diff options
Diffstat (limited to 'Build/source/libs/potrace/potrace-src/src')
54 files changed, 14101 insertions, 0 deletions
diff --git a/Build/source/libs/potrace/potrace-src/src/Makefile.am b/Build/source/libs/potrace/potrace-src/src/Makefile.am new file mode 100644 index 00000000000..1a925725860 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/Makefile.am @@ -0,0 +1,61 @@ +## Copyright (C) 2001-2019 Peter Selinger. +## This file is part of Potrace. It is free software and it is covered +## by the GNU General Public License. See the file COPYING for details. + +## Process this file with automake to produce Makefile.in + +AM_CFLAGS = $(CADD) + +#---------------------------------------------------------------------- +# programs: + +bin_PROGRAMS = potrace mkbitmap +EXTRA_PROGRAMS = potracelib_demo + +potrace_SOURCES = main.c main.h bitmap_io.c bitmap_io.h backend_eps.c \ + backend_eps.h flate.c flate.h lists.h greymap.c greymap.h render.c \ + render.h backend_pgm.c backend_pgm.h backend_svg.c backend_svg.h \ + backend_xfig.c backend_xfig.h backend_dxf.c backend_dxf.h \ + backend_pdf.c backend_pdf.h backend_geojson.c backend_geojson.h \ + lzw.c lzw.h bitops.h auxiliary.h potracelib.h bitmap.h curve.h \ + platform.h progress.h progress_bar.c progress_bar.h bbox.c bbox.h \ + trans.c trans.h +EXTRA_potrace_SOURCES = getopt.c getopt1.c include/getopt/getopt.h +potrace_LDADD = libpotrace.la @EXTRA_OBJS@ -lm @EXTRA_LIBS@ +potrace_DEPENDENCIES = libpotrace.la @EXTRA_OBJS@ + +mkbitmap_SOURCES = mkbitmap.c bitmap_io.c bitmap_io.h greymap.c \ + greymap.h platform.h bitmap.h potracelib.h bitops.h +EXTRA_mkbitmap_SOURCES = getopt.c getopt1.c include/getopt/getopt.h +mkbitmap_LDADD = @EXTRA_OBJS@ -lm +mkbitmap_DEPENDENCIES = @EXTRA_OBJS@ + +potracelib_demo_SOURCES = potracelib_demo.c +potracelib_demo_LDADD = libpotrace.la -lm +potracelib_demo_DEPENDENCIES = libpotrace.la + +AM_CPPFLAGS = @EXTRA_INCLUDES@ + +#---------------------------------------------------------------------- +# Potrace library: + +libsources = curve.c curve.h trace.c trace.h decompose.c \ + decompose.h potracelib.c potracelib.h lists.h auxiliary.h bitmap.h \ + progress.h + +lib_LTLIBRARIES = $(INSTLIBS) +EXTRA_LTLIBRARIES = libpotrace.la +libpotrace_la_SOURCES = $(libsources) +libpotrace_la_LDFLAGS = -version-info 0:6:0 -rpath '$(libdir)' \ + -export-symbols $(srcdir)/libpotrace-export.sym -no-undefined +libpotrace_la_LIBADD = -lm +MOSTLYCLEANFILES = libpotrace.la + +# header files to install +include_HEADERS = $(INSTHEADERS) +EXTRA_HEADERS = potracelib.h + +#---------------------------------------------------------------------- +# other stuff to distribute + +EXTRA_DIST = libpotrace-export.sym diff --git a/Build/source/libs/potrace/potrace-src/src/Makefile.in b/Build/source/libs/potrace/potrace-src/src/Makefile.in new file mode 100644 index 00000000000..51932fa1a2c --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/Makefile.in @@ -0,0 +1,901 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + + + +VPATH = @srcdir@ +am__is_gnu_make = { \ + if test -z '$(MAKELEVEL)'; then \ + false; \ + elif test -n '$(MAKE_HOST)'; then \ + true; \ + elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \ + true; \ + else \ + false; \ + fi; \ +} +am__make_running_with_option = \ + case $${target_option-} in \ + ?) ;; \ + *) echo "am__make_running_with_option: internal error: invalid" \ + "target option '$${target_option-}' specified" >&2; \ + exit 1;; \ + esac; \ + has_opt=no; \ + sane_makeflags=$$MAKEFLAGS; \ + if $(am__is_gnu_make); then \ + sane_makeflags=$$MFLAGS; \ + else \ + case $$MAKEFLAGS in \ + *\\[\ \ ]*) \ + bs=\\; 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It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* This header file collects some general-purpose macros (and static + inline functions) that are used in various places. */ + +#ifndef AUXILIARY_H +#define AUXILIARY_H + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdlib.h> + +/* ---------------------------------------------------------------------- */ +/* point arithmetic */ + +#include "potracelib.h" + +struct point_s { + long x; + long y; +}; +typedef struct point_s point_t; + +typedef potrace_dpoint_t dpoint_t; + +/* convert point_t to dpoint_t */ +static inline dpoint_t dpoint(point_t p) { + dpoint_t res; + res.x = p.x; + res.y = p.y; + return res; +} + +/* range over the straight line segment [a,b] when lambda ranges over [0,1] */ +static inline dpoint_t interval(double lambda, dpoint_t a, dpoint_t b) { + dpoint_t res; + + res.x = a.x + lambda * (b.x - a.x); + res.y = a.y + lambda * (b.y - a.y); + return res; +} + +/* ---------------------------------------------------------------------- */ +/* some useful macros. Note: the "mod" macro works correctly for + negative a. Also note that the test for a>=n, while redundant, + speeds up the mod function by 70% in the average case (significant + since the program spends about 16% of its time here - or 40% + without the test). The "floordiv" macro returns the largest integer + <= a/n, and again this works correctly for negative a, as long as + a,n are integers and n>0. */ + +/* integer arithmetic */ + +static inline int mod(int a, int n) { + return a>=n ? a%n : a>=0 ? a : n-1-(-1-a)%n; +} + +static inline int floordiv(int a, int n) { + return a>=0 ? a/n : -1-(-1-a)/n; +} + +/* Note: the following work for integers and other numeric types. */ +#undef sign +#undef abs +#undef min +#undef max +#undef sq +#undef cu +#define sign(x) ((x)>0 ? 1 : (x)<0 ? -1 : 0) +#define abs(a) ((a)>0 ? (a) : -(a)) +#define min(a,b) ((a)<(b) ? (a) : (b)) +#define max(a,b) ((a)>(b) ? (a) : (b)) +#define sq(a) ((a)*(a)) +#define cu(a) ((a)*(a)*(a)) + +#endif /* AUXILIARY_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/backend_dxf.c b/Build/source/libs/potrace/potrace-src/src/backend_dxf.c new file mode 100644 index 00000000000..3e42b95f533 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_dxf.c @@ -0,0 +1,278 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* The DXF backend of Potrace. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdarg.h> +#include <string.h> +#include <math.h> + +#include "main.h" +#include "backend_dxf.h" +#include "potracelib.h" +#include "lists.h" +#include "auxiliary.h" +#include "trans.h" + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +/* ---------------------------------------------------------------------- */ +/* auxiliary linear algebra functions */ + +/* subtract two vectors */ +static dpoint_t sub(dpoint_t v, dpoint_t w) { + dpoint_t r; + + r.x = v.x - w.x; + r.y = v.y - w.y; + return r; +} + +/* inner product */ +static double iprod(dpoint_t v, dpoint_t w) { + return v.x * w.x + v.y * w.y; +} + +/* cross product */ +static double xprod(dpoint_t v, dpoint_t w) { + return v.x * w.y - v.y * w.x; +} + +/* calculate the DXF polyline "bulge" value corresponding to the angle + between two vectors. In case of "infinity" return 0.0. */ +static double bulge(dpoint_t v, dpoint_t w) { + double v2, w2, vw, vxw, nvw; + + v2 = iprod(v, v); + w2 = iprod(w, w); + vw = iprod(v, w); + vxw = xprod(v, w); + nvw = sqrt(v2 * w2); + + if (vxw == 0.0) { + return 0.0; + } + + return (nvw - vw) / vxw; +} + +/* ---------------------------------------------------------------------- */ +/* DXF output synthesis */ + +/* print with group code: the low-level DXF file format */ +static int ship(FILE *fout, int gc, const char *fmt, ...) { + va_list args; + int r; + int c; + + r = fprintf(fout, "%3d\n", gc); + if (r < 0) { + return r; + } + c = r; + va_start(args, fmt); + r = vfprintf(fout, fmt, args); + va_end(args); + if (r < 0) { + return r; + } + c += r; + r = fprintf(fout, "\n"); + if (r < 0) { + return r; + } + c += r; + return c; +} + +/* output the start of a polyline */ +static void ship_polyline(FILE *fout, const char *layer, int closed) { + ship(fout, 0, "POLYLINE"); + ship(fout, 8, "%s", layer); + ship(fout, 66, "%d", 1); + ship(fout, 70, "%d", closed ? 1 : 0); +} + +/* output a vertex */ +static void ship_vertex(FILE *fout, const char *layer, dpoint_t v, double bulge) { + ship(fout, 0, "VERTEX"); + ship(fout, 8, "%s", layer); + ship(fout, 10, "%f", v.x); + ship(fout, 20, "%f", v.y); + ship(fout, 42, "%f", bulge); +} + +/* output the end of a polyline */ +static void ship_seqend(FILE *fout) { + ship(fout, 0, "SEQEND"); +} + +/* output a comment */ +static void ship_comment(FILE *fout, const char *comment) { + ship(fout, 999, "%s", comment); +} + +/* output the start of a section */ +static void ship_section(FILE *fout, const char *name) { + ship(fout, 0, "SECTION"); + ship(fout, 2, "%s", name); +} + +static void ship_endsec(FILE *fout) { + ship(fout, 0, "ENDSEC"); +} + +static void ship_eof(FILE *fout) { + ship(fout, 0, "EOF"); +} + +/* ---------------------------------------------------------------------- */ +/* Simulated quadratic and bezier curves */ + +/* Output vertices (with bulges) corresponding to a smooth pair of + circular arcs from A to B, tangent to AC at A and to CB at + B. Segments are meant to be concatenated, so don't output the final + vertex. */ +static void pseudo_quad(FILE *fout, const char *layer, dpoint_t A, dpoint_t C, dpoint_t B) { + dpoint_t v, w; + double v2, w2, vw, vxw, nvw; + double a, b, c, y; + dpoint_t G; + double bulge1, bulge2; + + v = sub(A, C); + w = sub(B, C); + + v2 = iprod(v, v); + w2 = iprod(w, w); + vw = iprod(v, w); + vxw = xprod(v, w); + nvw = sqrt(v2 * w2); + + a = v2 + 2*vw + w2; + b = v2 + 2*nvw + w2; + c = 4*nvw; + if (vxw == 0 || a == 0) { + goto degenerate; + } + /* assert: a,b,c >= 0, b*b - a*c >= 0, and 0 <= b - sqrt(b*b - a*c) <= a */ + y = (b - sqrt(b*b - a*c)) / a; + G = interval(y, C, interval(0.5, A, B)); + + bulge1 = bulge(sub(A,G), v); + bulge2 = bulge(w, sub(B,G)); + + ship_vertex(fout, layer, A, -bulge1); + ship_vertex(fout, layer, G, -bulge2); + return; + + degenerate: + ship_vertex(fout, layer, A, 0); + + return; +} + +/* produce a smooth from A to D, tangent to AB at A and to CD at D. + This is similar to a Bezier curve, except that our curve will be + made up of up to 4 circular arcs. This is particularly intended for + the case when AD and BC are parallel. Like arcs(), don't output the + final vertex. */ +static void pseudo_bezier(FILE *fout, const char *layer, dpoint_t A, dpoint_t B, dpoint_t C, dpoint_t D) { + dpoint_t E = interval(0.75, A, B); + dpoint_t G = interval(0.75, D, C); + dpoint_t F = interval(0.5, E, G); + + pseudo_quad(fout, layer, A, E, F); + pseudo_quad(fout, layer, F, G, D); + return; +} + +/* ---------------------------------------------------------------------- */ +/* functions for converting a path to a DXF polyline */ + +/* do one path. */ +static int dxf_path(FILE *fout, const char *layer, potrace_curve_t *curve, trans_t t) { + int i; + dpoint_t *c, *c1; + int n = curve->n; + + ship_polyline(fout, layer, 1); + + for (i=0; i<n; i++) { + c = curve->c[i]; + c1 = curve->c[mod(i-1,n)]; + switch (curve->tag[i]) { + case POTRACE_CORNER: + ship_vertex(fout, layer, trans(c1[2], t), 0); + ship_vertex(fout, layer, trans(c[1], t), 0); + break; + case POTRACE_CURVETO: + pseudo_bezier(fout, layer, trans(c1[2], t), trans(c[0], t), trans(c[1], t), trans(c[2], t)); + break; + } + } + ship_seqend(fout); + return 0; +} + +/* ---------------------------------------------------------------------- */ +/* Backend. */ + +/* public interface for DXF */ +int page_dxf(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) { + potrace_path_t *p; + trans_t t; + const char *layer = "0"; + + /* set up the coordinate transform (rotation) */ + t.bb[0] = imginfo->trans.bb[0]+imginfo->lmar+imginfo->rmar; + t.bb[1] = imginfo->trans.bb[1]+imginfo->tmar+imginfo->bmar; + t.orig[0] = imginfo->trans.orig[0]+imginfo->lmar; + t.orig[1] = imginfo->trans.orig[1]+imginfo->bmar; + t.x[0] = imginfo->trans.x[0]; + t.x[1] = imginfo->trans.x[1]; + t.y[0] = imginfo->trans.y[0]; + t.y[1] = imginfo->trans.y[1]; + + ship_comment(fout, "DXF data, created by " POTRACE " " VERSION ", written by Peter Selinger 2001-2019"); + + /* header section */ + ship_section(fout, "HEADER"); + + /* variables */ + ship(fout, 9, "$ACADVER"); + ship(fout, 1, "AC1006"); + ship(fout, 9, "$EXTMIN"); + ship(fout, 10, "%f", 0.0); + ship(fout, 20, "%f", 0.0); + ship(fout, 30, "%f", 0.0); + ship(fout, 9, "$EXTMAX"); + ship(fout, 10, "%f", t.bb[0]); + ship(fout, 20, "%f", t.bb[1]); + ship(fout, 30, "%f", 0.0); + + ship_endsec(fout); + + /* entities section */ + ship_section(fout, "ENTITIES"); + + /* write paths */ + list_forall (p, plist) { + dxf_path(fout, layer, &p->curve, t); + } + + ship_endsec(fout); + ship_eof(fout); + + fflush(fout); + return 0; +} + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_dxf.h b/Build/source/libs/potrace/potrace-src/src/backend_dxf.h new file mode 100644 index 00000000000..be7424f7f51 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_dxf.h @@ -0,0 +1,15 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef BACKEND_DXF_H +#define BACKEND_DXF_H + +#include "potracelib.h" +#include "main.h" + +int page_dxf(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); + +#endif /* BACKEND_DXF_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_eps.c b/Build/source/libs/potrace/potrace-src/src/backend_eps.c new file mode 100644 index 00000000000..fe2878132e1 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_eps.c @@ -0,0 +1,855 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* The Postscript backend of Potrace. This can produce "ps" or "eps" + output, and different kinds of graphical debugging + output. Postscript compression is optionally supplied via the + functions in flate.c. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdarg.h> +#include <string.h> +#include <math.h> +#include <stdlib.h> + +#include "potracelib.h" +#include "curve.h" +#include "main.h" +#include "backend_eps.h" +#include "flate.h" +#include "lists.h" +#include "auxiliary.h" + +#define SAFE_CALLOC(var, n, typ) \ + if ((var = (typ *)calloc(n, sizeof(typ))) == NULL) goto calloc_error + +typedef int color_t; + +#define black 0x000000 +#define red 0xff0000 +#define green 0x008000 +#define blue 0x0000ff + +#define TRY(x) if (x) goto try_error + +/* ---------------------------------------------------------------------- */ +/* functions for interfacing with compression backend */ + +/* xship: callback function that must be initialized before calling + any other functions of the "ship" family. xship_file must be + initialized too. */ + +/* print the token to f, but filtered through a compression + filter in case filter!=0 */ +static int (*xship)(FILE *f, int filter, const char *s, int len); +static FILE *xship_file; + +/* ship postscript code, filtered */ +static int ship(const char *fmt, ...) { + va_list args; + static char buf[4096]; /* static string limit is okay here because + we only use constant format strings - for + the same reason, it is okay to use + vsprintf instead of vsnprintf below. */ + va_start(args, fmt); + vsprintf(buf, fmt, args); + buf[4095] = 0; + va_end(args); + + xship(xship_file, 1, buf, strlen(buf)); + return 0; +} + +/* ship a postscript comment, unfiltered */ +static int shipcom(const char *fmt, ...) { + static char buf[4096]; + va_list args; + + va_start(args, fmt); + vsprintf(buf, fmt, args); + buf[4095] = 0; + va_end(args); + + xship(xship_file, 0, buf, strlen(buf)); + return 0; +} + +/* set all callback functions */ +static void eps_callbacks(FILE *fout) { + if (info.compress && info.pslevel==2) { + xship = lzw_xship; + } else if (info.compress && info.pslevel==3) { + xship = flate_xship; + } else { + xship = dummy_xship; + } + xship_file = fout; +} + +/* ---------------------------------------------------------------------- */ +/* postscript path-drawing auxiliary functions */ + +/* coordinate quantization */ +static inline point_t unit(dpoint_t p) { + point_t q; + + q.x = (long)(floor(p.x*info.unit+.5)); + q.y = (long)(floor(p.y*info.unit+.5)); + return q; +} + +/* current point */ +static point_t cur; + +static void eps_coords(dpoint_t p) { + cur = unit(p); + ship("%ld %ld ", cur.x, cur.y); +} + +static void eps_rcoords(dpoint_t p) { + point_t q; + + q = unit(p); + ship("%ld %ld ", q.x-cur.x, q.y-cur.y); + cur = q; +} + +static void eps_moveto(dpoint_t p) { + eps_coords(p); + ship("moveto\n"); +} + +/* move to point + offset */ +static void eps_moveto_offs(dpoint_t p, double xoffs, double yoffs) { + /* note: structs are passed by value, so the following assignment + does not modify the original struct in the caller */ + p.x += xoffs; + p.y += yoffs; + eps_coords(p); + ship("moveto\n"); +} + +static void eps_lineto(dpoint_t p) { + eps_rcoords(p); + ship("rlineto\n"); +} + +static void eps_curveto(dpoint_t p1, dpoint_t p2, dpoint_t p3) { + point_t q1, q2, q3; + + q1 = unit(p1); + q2 = unit(p2); + q3 = unit(p3); + + ship("%ld %ld %ld %ld %ld %ld rcurveto\n", q1.x-cur.x, q1.y-cur.y, q2.x-cur.x, q2.y-cur.y, q3.x-cur.x, q3.y-cur.y); + + cur = q3; +} + +/* this procedure returns a statically allocated string */ +static const char *eps_colorstring(const color_t col) { + double r, g, b; + static char buf[100]; + + r = (col & 0xff0000) >> 16; + g = (col & 0x00ff00) >> 8; + b = (col & 0x0000ff) >> 0; + + if (r==0 && g==0 && b==0) { + return "0 setgray"; + } else if (r==255 && g==255 && b==255) { + return "1 setgray"; + } else if (r == g && g == b) { + sprintf(buf, "%.3f setgray", r/255.0); + return buf; + } else { + sprintf(buf, "%.3f %.3f %.3f setrgbcolor", r/255.0, g/255.0, b/255.0); + return buf; + } +} + +static color_t eps_color = -1; +static double eps_width = -1; + +static void eps_setcolor(const color_t col) { + if (col == eps_color) { + return; + } + eps_color = col; + + ship("%s\n", eps_colorstring(col)); +} + +static void eps_linewidth(double w) { + if (w == eps_width) { + return; + } + eps_width = w; + ship("%f setlinewidth\n", w * info.unit); +} + +/* ---------------------------------------------------------------------- */ +/* functions for converting a path to postscript code */ + +/* ---------------------------------------------------------------------- */ +/* ASCII encoding */ + +/* explicit encoding, does not use special macros */ +static int eps_path_long(privcurve_t *curve) { + int i; + dpoint_t *c; + int m = curve->n; + + c = curve->c[m-1]; + eps_moveto(c[2]); + + for (i=0; i<m; i++) { + c = curve->c[i]; + switch (curve->tag[i]) { + case POTRACE_CORNER: + eps_lineto(c[1]); + eps_lineto(c[2]); + break; + case POTRACE_CURVETO: + eps_curveto(c[0], c[1], c[2]); + break; + } + } + return 0; +} + +/* size-optimized encoding relies on special macros */ +static int eps_path_short(privcurve_t *curve) { + int i, i1; + long int *bq = NULL; /* bq[m] */ + long int *aq = NULL; /* aq[m] */ + point_t *v = NULL; /* v[m] */ + dpoint_t *q = NULL; /* q[m] */ + double M; + int m = curve->n; + + SAFE_CALLOC(bq, m, long int); + SAFE_CALLOC(aq, m, long int); + SAFE_CALLOC(v, m, point_t); + SAFE_CALLOC(q, m, dpoint_t); + + /* quantize vertices */ + for (i=0; i<m; i++) { + v[i] = unit(curve->vertex[i]); + } + + /* quantize beta */ + for (i=0; i<m; i++) { + i1 = mod(i+1,m); + M = max(10, max(abs(v[i1].x-v[i].x), abs(v[i1].y-v[i].y))); + bq[i] = (int)(M * curve->beta[i] + 0.5); + if (curve->beta[i] != 0.5) { + q[i1] = interval(bq[i]/M, dpoint(v[i]), dpoint(v[i1])); + } else { + q[i1] = interval(0.5, dpoint(v[i]), dpoint(v[i1])); + } + } + + /* quantize alpha */ + for (i=0; i<m; i++) { + i1 = mod(i+1,m); + M = max(10, max(max(abs(q[i].x-v[i].x), abs(q[i].y-v[i].y)), + max(abs(v[i].x-q[i1].x), abs(v[i].y-q[i1].y)))); + if (curve->tag[i] == POTRACE_CURVETO) { + aq[i] = (int)(M * curve->alpha[i] + 0.5); + if (aq[i] > M) { + aq[i]--; + } + } + } + + /* generate output */ + ship("%ld %ld ", v[m-1].x, v[m-1].y); + ship("%ld %ld ", v[0].x - v[m-1].x, v[0].y - v[m-1].y); + if (curve->beta[m-1] == 0.5) { + ship("i\n"); + } else { + ship("%ld I\n", bq[m-1]); + } + for (i=0; i<m; i++) { + if (i<m-1) { + ship("%ld %ld ", v[i+1].x - v[i].x, v[i+1].y - v[i].y); + if (curve->beta[i] != 0.5) { + ship("%ld ", bq[i]); + } + } + if (curve->tag[i] == POTRACE_CURVETO) { + ship(curve->beta[i] == 0.5 ? "%ld c\n" : "%ld C\n", aq[i]); + } else { + ship(curve->beta[i] == 0.5 ? "v\n" : "V\n"); + } + } + + free(bq); + free(aq); + free(v); + free(q); + return 0; + + calloc_error: + free(bq); + free(aq); + free(v); + free(q); + return 1; +} + +static int eps_path(privcurve_t *curve) { + if (info.longcoding==0 && curve->alphacurve) { + return eps_path_short(curve); + } else { + return eps_path_long(curve); + } +} + +/* ---------------------------------------------------------------------- */ +/* functions for rendering various internal data structures, used to + generate debugging output */ + +/* output jaggie curve in grey */ +static void eps_jaggy(potrace_path_t *plist) { + potrace_path_t *p; + int i; + + ship(".9 setgray\n"); + list_forall (p, plist) { + point_t *pt = p->priv->pt; + point_t cur, prev; + + if (p->sign == '+') { + cur = prev = pt[p->priv->len-1]; + eps_moveto(dpoint(cur)); + for (i=0; i<p->priv->len; i++) { + if (pt[i].x != cur.x && pt[i].y != cur.y) { + cur = prev; + eps_lineto(dpoint(cur)); + } + prev = pt[i]; + } + eps_lineto(dpoint(pt[p->priv->len-1])); + } else { + cur = prev = pt[0]; + eps_moveto(dpoint(cur)); + for (i=p->priv->len-1; i>=0; i--) { + if (pt[i].x != cur.x && pt[i].y != cur.y) { + cur = prev; + eps_lineto(dpoint(cur)); + } + prev = pt[i]; + } + eps_lineto(dpoint(pt[0])); + } + if (p->next == NULL || p->next->sign == '+') { + ship("fill\n"); + } + } +} + +/* output polygon */ +static void eps_polygon(privcurve_t *curve, const color_t col) { + int i; + int m = curve->n; + + eps_linewidth(.02); + eps_setcolor(col); + eps_moveto(curve->vertex[m-1]); + for (i=0; i<m; i++) { + eps_lineto(curve->vertex[i]); + } + ship("stroke\n"); +} + +/* output lines L and parameter alpha */ +static void eps_L(privcurve_t *curve, const color_t col) { + int i, i1; + double gamma; + dpoint_t p1, p4, p1l, p4l; + int m = curve->n; + + for (i=0; i<m; i++) { + i1 = mod(i+1, m); + gamma = curve->alpha0[i1] * 0.75; + + p1 = curve->c[i][2]; + p4 = curve->c[i1][2]; + p1l = interval(gamma, p1, curve->vertex[i1]); + p4l = interval(gamma, p4, curve->vertex[i1]); + eps_linewidth(.02); + eps_setcolor(col); + eps_moveto(p1l); + eps_lineto(p4l); + ship("stroke\n"); + eps_moveto_offs(curve->vertex[i1], -.4, -.4); + ship("times (%.2f) show\n", curve->alpha0[i1]); + } +} + +/* ---------------------------------------------------------------------- */ +/* postscript macros */ + +/* special macros for size-optimized rendering of Bezier curves */ +static const char *optimacros = + "/D{bind def}def\n" + "/R{roll}D\n" + "/K{copy}D\n" + "/P{pop}D\n" + "/p{3 2 R add 3 1 R add exch}D\n" + "/t{dup 4 3 R mul 3 1 R mul}D\n" + "/a{dup 1 sub neg 4 1 R t 5 2 R t p}D\n" + "/m{2 K le{exch}if P}D\n" + "/n{abs exch abs m}D\n" + "/d{-1 t p n}D\n" + "/s{[4 2 R] cvx def}D\n" + "/g{7 K P 4 K P P d 5 1 R d 10 m m div 5 K 12 8 R 5 4 R a 9 4 R 3 2 R a 6 4 R curveto}D\n" + "/e{4 2 R lineto lineto P P}D\n" + "/q{3 K P n 10 m div}D\n" + "/f{x y 7 4 R 5 1 R 4 K p /y s 7 2 R 2 K 9 7 R 7 6 R t p 2 K /x s}D\n" + "/C{4 1 R q f 7 6 R g}D\n" + "/V{q f e}D\n" + "/c{3 1 R .5 f 7 6 R g}D\n" + "/v{.5 f e}D\n" + "/j{5 K P p /y s 3 K t 7 5 R p /x s x moveto P}D\n" + "/i{.5 j}D\n" + "/I{dup 6 1 R q j 3 2 R}D\n" + "/z{closepath}D\n" + "/b{%s z fill}D\n" + "/w{%s z fill}D\n"; + +/* special macros for debug output */ +static const char *debugmacros = + "/unit { %f } def\n" + "/box { newpath 0 0 moveto 0 1 lineto 1 1 lineto 1 0 lineto closepath } def\n" + "/circ { newpath 0 0 1 0 360 arc closepath } def\n" + "/dot { gsave .15 mul dup scale circ fill grestore } def\n" + "/sq { gsave unit unit scale -.5 -.5 translate box .02 setlinewidth stroke grestore } def\n" + "/sq1 { gsave translate sq unit .6 mul dot grestore } def\n" + "/dot2 { gsave translate unit dot grestore } def\n" + "/usq { gsave unit unit scale -.5 -.5 rmoveto 0 1 rlineto 1 0 rlineto 0 -1 rlineto closepath .02 setlinewidth stroke grestore } def\n" + "/dot1 { gsave translate unit .3 mul dup scale circ fill grestore } def\n" + "/times { /Times-Roman findfont unit .3 mul scalefont setfont } def\n" + "/times1 { /Times-Roman findfont unit 10 mul scalefont setfont 0 0 0 setrgbcolor } def\n" + "/times2 { /Times-Roman findfont unit 2 mul scalefont setfont 0 0 0 setrgbcolor } def\n"; + +/* ---------------------------------------------------------------------- */ +/* Backends for various types of output. */ + +/* Normal output: black on transparent */ +static int render0(potrace_path_t *plist) { + potrace_path_t *p; + + if (info.longcoding) { + eps_setcolor(info.color); + list_forall (p, plist) { + TRY(eps_path(p->priv->fcurve)); + ship("closepath\n"); + if (p->next == NULL || p->next->sign == '+') { + ship("fill\n"); + } + } + } else { + list_forall (p, plist) { + TRY(eps_path(p->priv->fcurve)); + if (p->next == NULL || p->next->sign == '+') { + ship("b\n"); + } else { + ship("z\n"); + } + } + } + return 0; + + try_error: + return 1; +} + +/* Opaque output: alternating black and white */ +static int render0_opaque(potrace_path_t *plist) { + potrace_path_t *p; + + if (info.longcoding) { + list_forall (p, plist) { + TRY(eps_path(p->priv->fcurve)); + ship("closepath\n"); + eps_setcolor(p->sign=='+' ? info.color : info.fillcolor); + ship("fill\n"); + } + } else { + list_forall (p, plist) { + TRY(eps_path(p->priv->fcurve)); + ship(p->sign=='+' ? "b\n" : "w\n"); + } + } + return 0; + + try_error: + return 1; +} + +/* Debug output type 1 (show optimal polygon) */ +static int render1(potrace_path_t *plist) { + potrace_path_t *p; + int i; + + eps_jaggy(plist); + + list_forall (p, plist) { + + point_t *pt = p->priv->pt; + int n = p->priv->len; + int m = p->priv->m; + int *po = p->priv->po; + + eps_linewidth(.02); + eps_setcolor(black); + /* output jaggie curve in boxed style */ + for (i=1; i<n; i++) { + eps_moveto(dpoint(pt[i-1])); + eps_lineto(dpoint(pt[i])); + ship("stroke\n"); + eps_coords(dpoint(pt[i])); + ship("sq1\n"); + } + eps_moveto(dpoint(pt[n-1])); + eps_lineto(dpoint(pt[0])); + ship("stroke\n"); + eps_coords(dpoint(pt[0])); + ship("sq1\n"); + + /* output the uncorrected polygon */ + eps_linewidth(.1); + eps_setcolor(blue); + eps_moveto(dpoint(pt[po[0]])); + for (i=1; i<m; i++) { + eps_lineto(dpoint(pt[po[i]])); + } + eps_lineto(dpoint(pt[po[0]])); + ship("stroke\n"); + for (i=0; i<m; i++) { + eps_coords(dpoint(pt[po[i]])); + ship("dot2\n"); + } + } + return 0; +} + +/* Debug output type 2 (show corrected polygon and edge detection) */ +static int render2(potrace_path_t *plist) { + potrace_path_t *p; + int i; + + /* output original bitmap in grey */ + eps_jaggy(plist); + + list_forall (p, plist) { + /* output polygon with corrected edges, lines L, and parameter alpha */ + eps_polygon(&p->priv->curve, black); + eps_L(&p->priv->curve, black); + + /* output the vertex unit squares */ + for (i=0; i<p->priv->curve.n; i++) { + eps_moveto(p->priv->curve.vertex[i]); + ship("usq\n"); + } + + /* output the path */ + eps_linewidth(.1); + eps_setcolor(blue); + TRY(eps_path(&p->priv->curve)); + ship("closepath\n"); + ship("stroke\n"); + + if (info.param->opticurve && info.debug == 3) { + + /* output opticurve */ + eps_linewidth(.05); + eps_setcolor(red); + TRY(eps_path(&p->priv->ocurve)); + ship("closepath\n"); + ship("stroke\n"); + + /* output dots */ + for (i=0; i<p->priv->ocurve.n; i++) { + eps_coords(p->priv->ocurve.c[i][2]); + ship("dot1\n"); + } + } + } + return 0; + + try_error: + return 1; +} + +/* Free-style debug output */ +static int render_debug(potrace_path_t *plist) { + potrace_path_t *p; + int count; + int i; + + /* output original bitmap in grey */ + eps_jaggy(plist); + + count = -1; + list_forall (p, plist) { + count++; + + /* output path numbers */ + eps_moveto_offs(p->priv->curve.vertex[0], 0, 5); + ship("times1 (%d) show\n", count); + + /* output polygon with corrected edges, lines L, and parameter alpha */ + eps_polygon(&p->priv->curve, black); + eps_L(&p->priv->curve, black); + + /* output the vertex unit squares */ + for (i=0; i<p->priv->curve.n; i++) { + eps_moveto(p->priv->curve.vertex[i]); + ship("usq\n"); + } + + /* output the vertex numbers */ + for (i=0; i<p->priv->curve.n; i++) { + eps_moveto_offs(p->priv->curve.vertex[i], +1, +1); + ship("times2 (%d) show\n", i); + } + + /* output the path */ + eps_linewidth(.1); + eps_setcolor(blue); + TRY(eps_path(&p->priv->curve)); + ship("closepath\n"); + ship("stroke\n"); + + if (info.param->opticurve) { + + /* output the opti-verteces polygon */ + eps_polygon(&p->priv->ocurve, green); + + /* output opticurve */ + eps_linewidth(.05); + eps_setcolor(red); + TRY(eps_path(&p->priv->ocurve)); + ship("closepath\n"); + ship("stroke\n"); + + /* output dots */ + for (i=0; i<p->priv->ocurve.n; i++) { + eps_coords(p->priv->ocurve.c[i][2]); + ship("dot1\n"); + } + + /* output beta parameters */ + for (i=0; i<p->priv->ocurve.n; i++) { + eps_moveto_offs(p->priv->ocurve.c[i][2], +.4, -.4); + ship("times (%.2f) show\n", p->priv->ocurve.beta[i]); + } + } + } + return 0; + + try_error: + return 1; +} + +/* select the appropriate rendering function from above */ +static int eps_render(potrace_path_t *plist) { + int r; + + switch (info.debug) { + case 0: + if (info.opaque) { + r = render0_opaque(plist); + } else { + r = render0(plist); + } + break; + case 1: + r = render1(plist); + break; + case 2: case 3: + r = render2(plist); + break; + default: + r = render_debug(plist); + break; + } + return r; +} + +/* ---------------------------------------------------------------------- */ +/* EPS header and footer */ + +static int eps_init(imginfo_t *imginfo) { + double origx = imginfo->trans.orig[0] + imginfo->lmar; + double origy = imginfo->trans.orig[1] + imginfo->bmar; + double scalex = imginfo->trans.scalex / info.unit; + double scaley = imginfo->trans.scaley / info.unit; + char *c0, *c1; + + shipcom("%%!PS-Adobe-3.0 EPSF-3.0\n"); + shipcom("%%%%Creator: " POTRACE " " VERSION ", written by Peter Selinger 2001-2019\n"); + shipcom("%%%%LanguageLevel: %d\n", info.pslevel); + shipcom("%%%%BoundingBox: 0 0 %.0f %.0f\n", + ceil(imginfo->trans.bb[0]+imginfo->lmar+imginfo->rmar), + ceil(imginfo->trans.bb[1]+imginfo->tmar+imginfo->bmar)); + shipcom("%%%%HiResBoundingBox: 0 0 %f %f\n", + imginfo->trans.bb[0]+imginfo->lmar+imginfo->rmar, + imginfo->trans.bb[1]+imginfo->tmar+imginfo->bmar); + shipcom("%%%%Pages: 1\n"); + shipcom("%%%%EndComments\n"); + + shipcom("%%%%Page: 1 1\n"); + ship("save\n"); + if (!info.longcoding) { + c0 = strdup(eps_colorstring(info.color)); + c1 = strdup(eps_colorstring(info.fillcolor)); + if (!c0 || !c1) { + free(c0); + free(c1); + return 1; + } + ship(optimacros, c0, c1); + free(c0); + free(c1); + } + if (info.debug) { + ship(debugmacros, info.unit); + } + if (origx != 0 || origy != 0) { + ship("%f %f translate\n", origx, origy); + } + if (info.angle != 0) { + ship("%.2f rotate\n", info.angle); + } + ship("%f %f scale\n", scalex, scaley); + + return 0; +} + +static void eps_term(void) { + ship("restore\n"); + shipcom("%%%%EOF\n"); +} + +/* public interface for EPS */ +int page_eps(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) { + eps_callbacks(fout); + + TRY(eps_init(imginfo)); + TRY(eps_render(plist)); + eps_term(); + return 0; + + try_error: + return 1; +} + +/* ---------------------------------------------------------------------- */ +/* PostScript header and footer */ + +static int eps_pagenumber; + +int init_ps(FILE *fout) { + char *c0, *c1; + + /* set callback functions for shipping routines */ + eps_callbacks(fout); + + shipcom("%%!PS-Adobe-3.0\n"); + shipcom("%%%%Creator: " POTRACE " " VERSION ", written by Peter Selinger 2001-2019\n"); + shipcom("%%%%LanguageLevel: %d\n", info.pslevel); + shipcom("%%%%BoundingBox: 0 0 %d %d\n", info.paperwidth, info.paperheight); + shipcom("%%%%Pages: (atend)\n"); + shipcom("%%%%EndComments\n"); + if (!info.longcoding || info.debug) { + shipcom("%%%%BeginSetup\n"); + if (!info.longcoding) { + c0 = strdup(eps_colorstring(info.color)); + c1 = strdup(eps_colorstring(info.fillcolor)); + if (!c0 || !c1) { + free(c0); + free(c1); + return 1; + } + ship(optimacros, c0, c1); + free(c0); + free(c1); + } + if (info.debug) { + ship(debugmacros, info.unit); + } + shipcom("%%%%EndSetup\n"); + } + eps_pagenumber = 0; + fflush(fout); + return 0; +} + +int term_ps(FILE *fout) { + eps_callbacks(fout); + + shipcom("%%%%Trailer\n"); + shipcom("%%%%Pages: %d\n", eps_pagenumber); + shipcom("%%%%EOF\n"); + fflush(fout); + + return 0; +} + +static void eps_pageinit_ps(imginfo_t *imginfo) { + double origx = imginfo->trans.orig[0] + imginfo->lmar; + double origy = imginfo->trans.orig[1] + imginfo->bmar; + double scalex = imginfo->trans.scalex / info.unit; + double scaley = imginfo->trans.scaley / info.unit; + + eps_pagenumber++; + eps_color = -1; + eps_width = -1; + + shipcom("%%%%Page: %d %d\n", eps_pagenumber, eps_pagenumber); + ship("save\n"); + if (origx != 0 || origy != 0) { + ship("%f %f translate\n", origx, origy); + } + if (info.angle != 0) { + ship("%.2f rotate\n", info.angle); + } + ship("%f %f scale\n", scalex, scaley); +} + +static void eps_pageterm_ps(void) { + ship("restore\n"); + ship("showpage\n"); +} + +int page_ps(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) { + int r; + + eps_callbacks(fout); + + eps_pageinit_ps(imginfo); + + r = eps_render(plist); + if (r) { + return r; + } + + eps_pageterm_ps(); + + shipcom(""); + + fflush(fout); + + return 0; +} diff --git a/Build/source/libs/potrace/potrace-src/src/backend_eps.h b/Build/source/libs/potrace/potrace-src/src/backend_eps.h new file mode 100644 index 00000000000..254a6c54818 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_eps.h @@ -0,0 +1,19 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef BACKEND_EPS_H +#define BACKEND_EPS_H + +#include "potracelib.h" +#include "main.h" + +int init_ps(FILE *fout); +int page_ps(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); +int term_ps(FILE *fout); + +int page_eps(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); + +#endif /* BACKEND_EPS_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_geojson.c b/Build/source/libs/potrace/potrace-src/src/backend_geojson.c new file mode 100644 index 00000000000..8ac226b8969 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_geojson.c @@ -0,0 +1,223 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* The GeoJSON backend of Potrace. */ +/* Written 2012 by Christoph Hormann <chris_hormann@gmx.de> */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdarg.h> +#include <string.h> +#include <math.h> + +#include "potracelib.h" +#include "curve.h" +#include "main.h" +#include "backend_geojson.h" +#include "lists.h" +#include "auxiliary.h" + +/* ---------------------------------------------------------------------- */ +/* auxiliary */ + +/* return a point on a 1-dimensional Bezier segment */ +static inline double bezier(double t, double x0, double x1, double x2, double x3) { + double s = 1-t; + return s*s*s*x0 + 3*(s*s*t)*x1 + 3*(t*t*s)*x2 + t*t*t*x3; +} + +static const char *format = "%f"; + +/* Convert a floating-point number to a string, using a pre-determined + format. The format must be previously set with set_format(). + Returns one of a small number of statically allocated strings. */ +static char *round_to_unit(double x) { + static int n = 0; + static char buf[4][100]; + + n++; + if (n >= 4) { + n = 0; + } + sprintf(buf[n], format, x); + return buf[n]; +} + +/* Select a print format for floating point numbers, appropriate for + the given scaling and info.unit. Note: the format must be so that + the resulting number fits into a buffer of size 100. */ +static void set_format(trans_t tr) { + double s; + int d; + static char buf[10]; + + s = min(fabs(tr.scalex), fabs(tr.scaley)); + if (info.unit != 0.0 && s != 0.0) { + d = (int)ceil(log(info.unit/s) / log(10)); + } else { + d = 0; + } + if (d <= 0) { + format = "%.0f"; + } else if (d <= 20) { + sprintf(buf, "%%.%df", d); + format = buf; + } else { + format = "%e"; + } +} + +/* ---------------------------------------------------------------------- */ +/* path-drawing auxiliary functions */ + +static dpoint_t cur; + +static void geojson_moveto(FILE *fout, dpoint_t p, trans_t tr) { + dpoint_t q; + + q = trans(p, tr); + + fprintf(fout, "[%s, %s]", round_to_unit(q.x), round_to_unit(q.y)); + + cur = q; +} + +static void geojson_lineto(FILE *fout, dpoint_t p, trans_t tr) { + dpoint_t q; + + q = trans(p, tr); + + fprintf(fout, ", [%s, %s]", round_to_unit(q.x), round_to_unit(q.y)); + + cur = q; +} + +static void geojson_curveto(FILE *fout, dpoint_t p1, dpoint_t p2, dpoint_t p3, trans_t tr) { + dpoint_t q1; + dpoint_t q2; + dpoint_t q3; + double step, t; + int i; + double x, y; + + q1 = trans(p1, tr); + q2 = trans(p2, tr); + q3 = trans(p3, tr); + + step = 1.0 / 8.0; + + for (i=0, t=step; i<8; i++, t+=step) { + x = bezier(t, cur.x, q1.x, q2.x, q3.x); + y = bezier(t, cur.y, q1.y, q2.y, q3.y); + + fprintf(fout, ", [%s, %s]", round_to_unit(x), round_to_unit(y)); + } + + cur = q3; +} + +/* ---------------------------------------------------------------------- */ +/* functions for converting a path to an SVG path element */ + +static int geojson_path(FILE *fout, potrace_curve_t *curve, trans_t tr) { + int i; + dpoint_t *c; + int m = curve->n; + + fprintf(fout, " ["); + + c = curve->c[m-1]; + geojson_moveto(fout, c[2], tr); + + for (i=0; i<m; i++) { + c = curve->c[i]; + switch (curve->tag[i]) { + case POTRACE_CORNER: + geojson_lineto(fout, c[1], tr); + geojson_lineto(fout, c[2], tr); + break; + case POTRACE_CURVETO: + geojson_curveto(fout, c[0], c[1], c[2], tr); + break; + } + } + + fprintf(fout, " ]"); + + return 0; +} + + +static void write_polygons(FILE *fout, potrace_path_t *tree, trans_t tr, int first) { + potrace_path_t *p, *q; + + for (p=tree; p; p=p->sibling) { + + if (!first) fprintf(fout, ",\n"); + + fprintf(fout, "{ \"type\": \"Feature\",\n"); + fprintf(fout, " \"properties\": { },\n"); + fprintf(fout, " \"geometry\": {\n"); + fprintf(fout, " \"type\": \"Polygon\",\n"); + fprintf(fout, " \"coordinates\": [\n"); + + geojson_path(fout, &p->curve, tr); + + for (q=p->childlist; q; q=q->sibling) { + fprintf(fout, ",\n"); + geojson_path(fout, &q->curve, tr); + } + + fprintf(fout, " ]\n"); + fprintf(fout, " }\n"); + fprintf(fout, "}"); + + for (q=p->childlist; q; q=q->sibling) { + write_polygons(fout, q->childlist, tr, 0); + } + + first = 0; + } +} + +/* ---------------------------------------------------------------------- */ +/* Backend. */ + +/* public interface for GeoJSON */ +int page_geojson(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) { + + trans_t tr; + + /* set up the coordinate transform (rotation) */ + tr.bb[0] = imginfo->trans.bb[0]+imginfo->lmar+imginfo->rmar; + tr.bb[1] = imginfo->trans.bb[1]+imginfo->tmar+imginfo->bmar; + tr.orig[0] = imginfo->trans.orig[0]+imginfo->lmar; + tr.orig[1] = imginfo->trans.orig[1]+imginfo->bmar; + tr.x[0] = imginfo->trans.x[0]; + tr.x[1] = imginfo->trans.x[1]; + tr.y[0] = imginfo->trans.y[0]; + tr.y[1] = imginfo->trans.y[1]; + + /* set the print format for floating point numbers */ + set_format(imginfo->trans); + + /* header */ + fprintf(fout, "{\n"); + fprintf(fout, "\"type\": \"FeatureCollection\",\n"); + fprintf(fout, "\"features\": [\n"); + + write_polygons(fout, plist, tr, 1); + + /* write footer */ + fprintf(fout, "\n]\n"); + fprintf(fout, "}\n"); + + fflush(fout); + + return 0; +} + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_geojson.h b/Build/source/libs/potrace/potrace-src/src/backend_geojson.h new file mode 100644 index 00000000000..1290bef0708 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_geojson.h @@ -0,0 +1,15 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef BACKEND_GEO_H +#define BACKEND_GEO_H + +#include "potracelib.h" +#include "main.h" + +int page_geojson(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); + +#endif /* BACKEND_GEO_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_pdf.c b/Build/source/libs/potrace/potrace-src/src/backend_pdf.c new file mode 100644 index 00000000000..c623426586e --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_pdf.c @@ -0,0 +1,441 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* The PDF backend of Potrace. Stream compression is optionally + supplied via the functions in flate.c. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdarg.h> +#include <string.h> +#include <math.h> +#include <stdlib.h> + +#include "main.h" +#include "backend_pdf.h" +#include "flate.h" +#include "lists.h" +#include "potracelib.h" +#include "auxiliary.h" + +typedef int color_t; + +#define TRY(x) if (x) goto try_error + +/* ---------------------------------------------------------------------- */ +/* auxiliary: growing arrays */ + +struct intarray_s { + int size; + int *data; +}; +typedef struct intarray_s intarray_t; + +static inline void intarray_init(intarray_t *ar) { + ar->size = 0; + ar->data = NULL; +} + +static inline void intarray_term(intarray_t *ar) { + free(ar->data); + ar->size = 0; + ar->data = NULL; +} + +/* Set ar[n]=val. Expects n>=0. Grows array if necessary. Return 0 on + success and -1 on error with errno set. */ +static inline int intarray_set(intarray_t *ar, int n, int val) { + int *p; + int s; + + if (n >= ar->size) { + s = n+1024; + p = (int *)realloc(ar->data, s * sizeof(int)); + if (!p) { + return -1; + } + ar->data = p; + ar->size = s; + } + ar->data[n] = val; + return 0; +} + +/* ---------------------------------------------------------------------- */ +/* some global variables */ + +static intarray_t xref; +static int nxref = 0; +static intarray_t pages; +static int npages; +static int streamofs; +static size_t outcount; /* output file position */ + +/* ---------------------------------------------------------------------- */ +/* functions for interfacing with compression backend */ + +/* xship: callback function that must be initialized before calling + any other functions of the "ship" family. xship_file must be + initialized too. */ + +/* print the token to f, but filtered through a compression + filter in case filter!=0 */ +static int (*xship)(FILE *f, int filter, const char *s, int len); +static FILE *xship_file; + +/* ship PDF code, filtered */ +static int ship(const char *fmt, ...) { + va_list args; + static char buf[4096]; /* static string limit is okay here because + we only use constant format strings - for + the same reason, it is okay to use + vsprintf instead of vsnprintf below. */ + va_start(args, fmt); + vsprintf(buf, fmt, args); + buf[4095] = 0; + va_end(args); + + outcount += xship(xship_file, 1, buf, strlen(buf)); + return 0; +} + +/* ship PDF code, unfiltered */ +static int shipclear(const char *fmt, ...) { + static char buf[4096]; + va_list args; + + va_start(args, fmt); + vsprintf(buf, fmt, args); + buf[4095] = 0; + va_end(args); + + outcount += xship(xship_file, 0, buf, strlen(buf)); + return 0; +} + +/* set all callback functions */ +static void pdf_callbacks(FILE *fout) { + + if (info.compress) { + xship = pdf_xship; + } else { + xship = dummy_xship; + } + xship_file = fout; +} + +/* ---------------------------------------------------------------------- */ +/* PDF path-drawing auxiliary functions */ + +/* coordinate quantization */ +static inline point_t unit(dpoint_t p) { + point_t q; + + q.x = (long)(floor(p.x*info.unit+.5)); + q.y = (long)(floor(p.y*info.unit+.5)); + return q; +} + +static void pdf_coords(dpoint_t p) { + point_t cur = unit(p); + ship("%ld %ld ", cur.x, cur.y); +} + +static void pdf_moveto(dpoint_t p) { + pdf_coords(p); + ship("m\n"); +} + +static void pdf_lineto(dpoint_t p) { + pdf_coords(p); + ship("l\n"); +} + +static void pdf_curveto(dpoint_t p1, dpoint_t p2, dpoint_t p3) { + point_t q1, q2, q3; + + q1 = unit(p1); + q2 = unit(p2); + q3 = unit(p3); + + ship("%ld %ld %ld %ld %ld %ld c\n", q1.x, q1.y, q2.x, q2.y, q3.x, q3.y); +} + +/* this procedure returns a statically allocated string */ +static const char *pdf_colorstring(const color_t col) { + double r, g, b; + static char buf[100]; + + r = (col & 0xff0000) >> 16; + g = (col & 0x00ff00) >> 8; + b = (col & 0x0000ff) >> 0; + + if (r==0 && g==0 && b==0) { + return "0 g"; + } else if (r==255 && g==255 && b==255) { + return "1 g"; + } else if (r == g && g == b) { + sprintf(buf, "%.3f g", r/255.0); + return buf; + } else { + sprintf(buf, "%.3f %.3f %.3f rg", r/255.0, g/255.0, b/255.0); + return buf; + } +} + +static color_t pdf_color = -1; + +static void pdf_setcolor(const color_t col) { + if (col == pdf_color) { + return; + } + pdf_color = col; + + ship("%s\n", pdf_colorstring(col)); +} + +/* explicit encoding, does not use special macros */ +static int pdf_path(potrace_curve_t *curve) { + int i; + dpoint_t *c; + int m = curve->n; + + c = curve->c[m-1]; + pdf_moveto(c[2]); + + for (i=0; i<m; i++) { + c = curve->c[i]; + switch (curve->tag[i]) { + case POTRACE_CORNER: + pdf_lineto(c[1]); + pdf_lineto(c[2]); + break; + case POTRACE_CURVETO: + pdf_curveto(c[0], c[1], c[2]); + break; + } + } + return 0; +} + +/* ---------------------------------------------------------------------- */ +/* Backends for various types of output. */ + +/* Normal output: black on transparent */ +static int render0(potrace_path_t *plist) { + potrace_path_t *p; + + pdf_setcolor(info.color); + list_forall (p, plist) { + pdf_path(&p->curve); + ship("h\n"); + if (p->next == NULL || p->next->sign == '+') { + ship("f\n"); + } + } + return 0; +} + +/* Opaque output: alternating black and white */ +static int render0_opaque(potrace_path_t *plist) { + potrace_path_t *p; + + list_forall (p, plist) { + pdf_path(&p->curve); + ship("h\n"); + pdf_setcolor(p->sign=='+' ? info.color : info.fillcolor); + ship("f\n"); + } + return 0; +} + +/* select the appropriate rendering function from above */ +static int pdf_render(potrace_path_t *plist) +{ + if (info.opaque) { + return render0_opaque(plist); + } + return render0(plist); +} + +/* ---------------------------------------------------------------------- */ +/* PDF header and footer */ + +int init_pdf(FILE *fout) +{ + intarray_init(&xref); + intarray_init(&pages); + nxref = 0; + npages = 0; + + /* set callback functions for shipping routines */ + pdf_callbacks(fout); + outcount = 0; + + shipclear("%%PDF-1.3\n"); + + TRY(intarray_set(&xref, nxref++, outcount)); + shipclear("1 0 obj\n<</Type/Catalog/Pages 3 0 R>>\nendobj\n"); + + TRY(intarray_set(&xref, nxref++, outcount)); + shipclear("2 0 obj\n" + "<</Creator" + "(" POTRACE " " VERSION ", written by Peter Selinger 2001-2019)>>\n" + "endobj\n"); + + /* delay obj #3 (pages) until end */ + nxref++; + + fflush(fout); + return 0; + + try_error: + return 1; +} + +int term_pdf(FILE *fout) +{ + int startxref; + int i; + + pdf_callbacks(fout); + + TRY(intarray_set(&xref, 2, outcount)); + shipclear("3 0 obj\n" + "<</Type/Pages/Count %d/Kids[\n", npages); + for (i = 0; i < npages; i++) + shipclear("%d 0 R\n", pages.data[i]); + shipclear("]>>\nendobj\n"); + + startxref = outcount; + + shipclear("xref\n0 %d\n", nxref + 1); + shipclear("0000000000 65535 f \n"); + for (i = 0; i < nxref; i++) + shipclear("%0.10d 00000 n \n", xref.data[i]); + + shipclear("trailer\n<</Size %d/Root 1 0 R/Info 2 0 R>>\n", nxref + 1); + shipclear("startxref\n%d\n%%%%EOF\n", startxref); + + fflush(fout); + intarray_term(&xref); + intarray_term(&pages); + return 0; + + try_error: + return 1; +} + +/* if largebbox is set, set bounding box to pagesize. Return 0 on + success or 1 on error with errno set. */ +static int pdf_pageinit(imginfo_t *imginfo, int largebbox) +{ + double origx = imginfo->trans.orig[0] + imginfo->lmar; + double origy = imginfo->trans.orig[1] + imginfo->bmar; + double dxx = imginfo->trans.x[0] / info.unit; + double dxy = imginfo->trans.x[1] / info.unit; + double dyx = imginfo->trans.y[0] / info.unit; + double dyy = imginfo->trans.y[1] / info.unit; + + double pagew = imginfo->trans.bb[0]+imginfo->lmar+imginfo->rmar; + double pageh = imginfo->trans.bb[1]+imginfo->tmar+imginfo->bmar; + + pdf_color = -1; + + TRY(intarray_set(&xref, nxref++, outcount)); + shipclear("%d 0 obj\n", nxref); + shipclear("<</Type/Page/Parent 3 0 R/Resources<</ProcSet[/PDF]>>"); + if (largebbox) { + shipclear("/MediaBox[0 0 %d %d]", info.paperwidth, info.paperheight); + } else { + shipclear("/MediaBox[0 0 %f %f]", pagew, pageh); + } + shipclear("/Contents %d 0 R>>\n", nxref + 1); + shipclear("endobj\n"); + + TRY(intarray_set(&pages, npages++, nxref)); + + TRY(intarray_set(&xref, nxref++, outcount)); + shipclear("%d 0 obj\n", nxref); + if (info.compress) + shipclear("<</Filter/FlateDecode/Length %d 0 R>>\n", nxref + 1); + else + shipclear("<</Length %d 0 R>>\n", nxref + 1); + shipclear("stream\n"); + + streamofs = outcount; + + ship("%f %f %f %f %f %f cm\n", dxx, dxy, dyx, dyy, origx, origy); + return 0; + + try_error: + return 1; +} + +/* Return 0 on success or 1 on error with errno set. */ +static int pdf_pageterm(void) +{ + int streamlen; + + shipclear(""); + + streamlen = outcount - streamofs; + shipclear("endstream\nendobj\n"); + + TRY(intarray_set(&xref, nxref++, outcount)); + shipclear("%d 0 obj\n%d\nendobj\n", nxref, streamlen); + return 0; + + try_error: + return 1; +} + +int page_pdf(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) +{ + int r; + + pdf_callbacks(fout); + + TRY(pdf_pageinit(imginfo, 0)); + + r = pdf_render(plist); + if (r) { + return r; + } + + TRY(pdf_pageterm()); + + fflush(fout); + return 0; + + try_error: + return 1; +} + +int page_pdfpage(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) +{ + int r; + + pdf_callbacks(fout); + + TRY(pdf_pageinit(imginfo, 1)); + + r = pdf_render(plist); + if (r) { + return r; + } + + TRY(pdf_pageterm()); + + fflush(fout); + return 0; + + try_error: + return 1; +} + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_pdf.h b/Build/source/libs/potrace/potrace-src/src/backend_pdf.h new file mode 100644 index 00000000000..0886318991b --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_pdf.h @@ -0,0 +1,20 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef BACKEND_PDF_H +#define BACKEND_PDF_H + +#include "potracelib.h" +#include "main.h" + +int init_pdf(FILE *fout); +int page_pdf(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); +int term_pdf(FILE *fout); + +int page_pdf(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); +int page_pdfpage(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); + +#endif /* BACKEND_PDF_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_pgm.c b/Build/source/libs/potrace/potrace-src/src/backend_pgm.c new file mode 100644 index 00000000000..3f7632b1505 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_pgm.c @@ -0,0 +1,106 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* The PGM backend of Potrace. Here we custom-render a set of Bezier + curves and output the result as a greymap. This is merely a + convenience, as the same could be achieved by piping the EPS output + through ghostscript. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <math.h> + +#include "backend_pgm.h" +#include "potracelib.h" +#include "lists.h" +#include "greymap.h" +#include "render.h" +#include "main.h" +#include "auxiliary.h" +#include "trans.h" + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +static void pgm_path(potrace_curve_t *curve, trans_t t, render_t *rm) { + dpoint_t *c, c1[3]; + int i; + int m = curve->n; + + c = curve->c[m-1]; + c1[2] = trans(c[2], t); + render_moveto(rm, c1[2].x, c1[2].y); + + for (i=0; i<m; i++) { + c = curve->c[i]; + switch (curve->tag[i]) { + case POTRACE_CORNER: + c1[1] = trans(c[1], t); + c1[2] = trans(c[2], t); + render_lineto(rm, c1[1].x, c1[1].y); + render_lineto(rm, c1[2].x, c1[2].y); + break; + case POTRACE_CURVETO: + c1[0] = trans(c[0], t); + c1[1] = trans(c[1], t); + c1[2] = trans(c[2], t); + render_curveto(rm, c1[0].x, c1[0].y, c1[1].x, c1[1].y, c1[2].x, c1[2].y); + break; + } + } +} + +int page_pgm(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) { + potrace_path_t *p; + greymap_t *gm; + render_t *rm; + int w, h; + trans_t t; + int mode; + const char *comment = "created by " POTRACE " " VERSION ", written by Peter Selinger 2001-2019"; + + t.bb[0] = imginfo->trans.bb[0]+imginfo->lmar+imginfo->rmar; + t.bb[1] = imginfo->trans.bb[1]+imginfo->tmar+imginfo->bmar; + t.orig[0] = imginfo->trans.orig[0]+imginfo->lmar; + t.orig[1] = imginfo->trans.orig[1]+imginfo->bmar; + t.x[0] = imginfo->trans.x[0]; + t.x[1] = imginfo->trans.x[1]; + t.y[0] = imginfo->trans.y[0]; + t.y[1] = imginfo->trans.y[1]; + + w = (int)ceil(t.bb[0]); + h = (int)ceil(t.bb[1]); + + gm = gm_new(w, h); + if (!gm) { + return 1; + } + rm = render_new(gm); + if (!rm) { + return 1; + } + + gm_clear(gm, 255); /* white */ + + list_forall(p, plist) { + pgm_path(&p->curve, t, rm); + } + + render_close(rm); + + /* if negative orientation, make sure to invert effect of rendering */ + mode = imginfo->width * imginfo->height < 0 ? GM_MODE_NEGATIVE : GM_MODE_POSITIVE; + + gm_writepgm(fout, rm->gm, comment, 1, mode, info.gamma); + + render_free(rm); + gm_free(gm); + + return 0; +} + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_pgm.h b/Build/source/libs/potrace/potrace-src/src/backend_pgm.h new file mode 100644 index 00000000000..55d77771929 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_pgm.h @@ -0,0 +1,16 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef BACKEND_PGM_H +#define BACKEND_PGM_H + +#include <stdio.h> + +#include "potracelib.h" +#include "main.h" + +int page_pgm(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); + +#endif /* BACKEND_PGM_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/backend_svg.c b/Build/source/libs/potrace/potrace-src/src/backend_svg.c new file mode 100644 index 00000000000..7b1d3a3b010 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_svg.c @@ -0,0 +1,342 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* The SVG backend of Potrace. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdarg.h> +#include <string.h> +#include <math.h> + +#include "potracelib.h" +#include "curve.h" +#include "main.h" +#include "backend_svg.h" +#include "lists.h" +#include "auxiliary.h" + +/* ---------------------------------------------------------------------- */ +/* path-drawing auxiliary functions */ + +/* coordinate quantization */ +static inline point_t unit(dpoint_t p) { + point_t q; + + q.x = (long)(floor(p.x*info.unit+.5)); + q.y = (long)(floor(p.y*info.unit+.5)); + return q; +} + +static point_t cur; +static char lastop = 0; +static int column = 0; +static int newline = 1; + +static void shiptoken(FILE *fout, const char *token) { + int c = strlen(token); + if (!newline && column+c+1 > 75) { + fprintf(fout, "\n"); + column = 0; + newline = 1; + } else if (!newline) { + fprintf(fout, " "); + column++; + } + fprintf(fout, "%s", token); + column += c; + newline = 0; +} + +static void ship(FILE *fout, const char *fmt, ...) { + va_list args; + static char buf[4096]; /* static string limit is okay here because + we only use constant format strings - for + the same reason, it is okay to use + vsprintf instead of vsnprintf below. */ + char *p, *q; + + va_start(args, fmt); + vsprintf(buf, fmt, args); + buf[4095] = 0; + va_end(args); + + p = buf; + while ((q = strchr(p, ' ')) != NULL) { + *q = 0; + shiptoken(fout, p); + p = q+1; + } + shiptoken(fout, p); +} + +static void svg_moveto(FILE *fout, dpoint_t p) { + cur = unit(p); + + ship(fout, "M%ld %ld", cur.x, cur.y); + lastop = 'M'; +} + +static void svg_rmoveto(FILE *fout, dpoint_t p) { + point_t q; + + q = unit(p); + ship(fout, "m%ld %ld", q.x-cur.x, q.y-cur.y); + cur = q; + lastop = 'm'; +} + +static void svg_lineto(FILE *fout, dpoint_t p) { + point_t q; + + q = unit(p); + + if (lastop != 'l') { + ship(fout, "l%ld %ld", q.x-cur.x, q.y-cur.y); + } else { + ship(fout, "%ld %ld", q.x-cur.x, q.y-cur.y); + } + cur = q; + lastop = 'l'; +} + +static void svg_curveto(FILE *fout, dpoint_t p1, dpoint_t p2, dpoint_t p3) { + point_t q1, q2, q3; + + q1 = unit(p1); + q2 = unit(p2); + q3 = unit(p3); + + if (lastop != 'c') { + ship(fout, "c%ld %ld %ld %ld %ld %ld", q1.x-cur.x, q1.y-cur.y, q2.x-cur.x, q2.y-cur.y, q3.x-cur.x, q3.y-cur.y); + } else { + ship(fout, "%ld %ld %ld %ld %ld %ld", q1.x-cur.x, q1.y-cur.y, q2.x-cur.x, q2.y-cur.y, q3.x-cur.x, q3.y-cur.y); + } + cur = q3; + lastop = 'c'; +} + +/* ---------------------------------------------------------------------- */ +/* functions for converting a path to an SVG path element */ + +/* Explicit encoding. If abs is set, move to first coordinate + absolutely. */ +static int svg_path(FILE *fout, potrace_curve_t *curve, int abs) { + int i; + dpoint_t *c; + int m = curve->n; + + c = curve->c[m-1]; + if (abs) { + svg_moveto(fout, c[2]); + } else { + svg_rmoveto(fout, c[2]); + } + + for (i=0; i<m; i++) { + c = curve->c[i]; + switch (curve->tag[i]) { + case POTRACE_CORNER: + svg_lineto(fout, c[1]); + svg_lineto(fout, c[2]); + break; + case POTRACE_CURVETO: + svg_curveto(fout, c[0], c[1], c[2]); + break; + } + } + newline = 1; + shiptoken(fout, "z"); + return 0; +} + +/* produce a jaggy path - for debugging. If abs is set, move to first + coordinate absolutely. If abs is not set, move to first coordinate + relatively, and traverse path in the opposite direction. */ +static int svg_jaggy_path(FILE *fout, point_t *pt, int n, int abs) { + int i; + point_t cur, prev; + + if (abs) { + cur = prev = pt[n-1]; + svg_moveto(fout, dpoint(cur)); + for (i=0; i<n; i++) { + if (pt[i].x != cur.x && pt[i].y != cur.y) { + cur = prev; + svg_lineto(fout, dpoint(cur)); + } + prev = pt[i]; + } + svg_lineto(fout, dpoint(pt[n-1])); + } else { + cur = prev = pt[0]; + svg_rmoveto(fout, dpoint(cur)); + for (i=n-1; i>=0; i--) { + if (pt[i].x != cur.x && pt[i].y != cur.y) { + cur = prev; + svg_lineto(fout, dpoint(cur)); + } + prev = pt[i]; + } + svg_lineto(fout, dpoint(pt[0])); + } + newline = 1; + shiptoken(fout, "z"); + return 0; +} + +static void write_paths_opaque(FILE *fout, potrace_path_t *tree) { + potrace_path_t *p, *q; + + for (p=tree; p; p=p->sibling) { + if (info.grouping == 2) { + fprintf(fout, "<g>\n"); + fprintf(fout, "<g>\n"); + } + column = fprintf(fout, "<path fill=\"#%06x\" stroke=\"none\" d=\"", info.color); + newline = 1; + lastop = 0; + if (info.debug == 1) { + svg_jaggy_path(fout, p->priv->pt, p->priv->len, 1); + } else { + svg_path(fout, &p->curve, 1); + } + fprintf(fout, "\"/>\n"); + for (q=p->childlist; q; q=q->sibling) { + column = fprintf(fout, "<path fill=\"#%06x\" stroke=\"none\" d=\"", info.fillcolor); + newline = 1; + lastop = 0; + if (info.debug == 1) { + svg_jaggy_path(fout, q->priv->pt, q->priv->len, 1); + } else { + svg_path(fout, &q->curve, 1); + } + fprintf(fout, "\"/>\n"); + } + if (info.grouping == 2) { + fprintf(fout, "</g>\n"); + } + for (q=p->childlist; q; q=q->sibling) { + write_paths_opaque(fout, q->childlist); + } + if (info.grouping == 2) { + fprintf(fout, "</g>\n"); + } + } +} + +static void write_paths_transparent_rec(FILE *fout, potrace_path_t *tree) { + potrace_path_t *p, *q; + + for (p=tree; p; p=p->sibling) { + if (info.grouping == 2) { + fprintf(fout, "<g>\n"); + } + if (info.grouping != 0) { + column = fprintf(fout, "<path d=\""); + newline = 1; + lastop = 0; + } + if (info.debug == 1) { + svg_jaggy_path(fout, p->priv->pt, p->priv->len, 1); + } else { + svg_path(fout, &p->curve, 1); + } + for (q=p->childlist; q; q=q->sibling) { + if (info.debug == 1) { + svg_jaggy_path(fout, q->priv->pt, q->priv->len, 0); + } else { + svg_path(fout, &q->curve, 0); + } + } + if (info.grouping != 0) { + fprintf(fout, "\"/>\n"); + } + for (q=p->childlist; q; q=q->sibling) { + write_paths_transparent_rec(fout, q->childlist); + } + if (info.grouping == 2) { + fprintf(fout, "</g>\n"); + } + } +} + +static void write_paths_transparent(FILE *fout, potrace_path_t *tree) { + if (info.grouping == 0) { + column = fprintf(fout, "<path d=\""); + newline = 1; + lastop = 0; + } + write_paths_transparent_rec(fout, tree); + if (info.grouping == 0) { + fprintf(fout, "\"/>\n"); + } +} + +/* ---------------------------------------------------------------------- */ +/* Backend. */ + +/* public interface for SVG */ +int page_svg(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) { + + double bboxx = imginfo->trans.bb[0]+imginfo->lmar+imginfo->rmar; + double bboxy = imginfo->trans.bb[1]+imginfo->tmar+imginfo->bmar; + double origx = imginfo->trans.orig[0] + imginfo->lmar; + double origy = bboxy - imginfo->trans.orig[1] - imginfo->bmar; + double scalex = imginfo->trans.scalex / info.unit; + double scaley = -imginfo->trans.scaley / info.unit; + + /* header */ + fprintf(fout, "<?xml version=\"1.0\" standalone=\"no\"?>\n"); + fprintf(fout, "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n"); + fprintf(fout, " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"); + + /* set bounding box and namespace */ + fprintf(fout, "<svg version=\"1.0\" xmlns=\"http://www.w3.org/2000/svg\"\n"); + fprintf(fout, " width=\"%fpt\" height=\"%fpt\" viewBox=\"0 0 %f %f\"\n", + bboxx, bboxy, bboxx, bboxy); + fprintf(fout, " preserveAspectRatio=\"xMidYMid meet\">\n"); + + /* metadata: creator */ + fprintf(fout, "<metadata>\n"); + fprintf(fout, "Created by " POTRACE " " VERSION ", written by Peter Selinger 2001-2019\n"); + fprintf(fout, "</metadata>\n"); + + /* use a "group" tag to establish coordinate system and style */ + fprintf(fout, "<g transform=\""); + if (origx != 0 || origy != 0) { + fprintf(fout, "translate(%f,%f) ", origx, origy); + } + if (info.angle != 0) { + fprintf(fout, "rotate(%.2f) ", -info.angle); + } + fprintf(fout, "scale(%f,%f)", scalex, scaley); + fprintf(fout, "\"\n"); + fprintf(fout, "fill=\"#%06x\" stroke=\"none\">\n", info.color); + + if (info.opaque) { + write_paths_opaque(fout, plist); + } else { + write_paths_transparent(fout, plist); + } + + /* write footer */ + fprintf(fout, "</g>\n"); + fprintf(fout, "</svg>\n"); + fflush(fout); + + return 0; +} + +/* the Gimppath backend is identical, except that it disables + --opaque, enables --flat, and the dimensions are pixel-based */ +int page_gimp(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) { + info.opaque = 0; + info.grouping = 0; + return page_svg(fout, plist, imginfo); +} diff --git a/Build/source/libs/potrace/potrace-src/src/backend_svg.h b/Build/source/libs/potrace/potrace-src/src/backend_svg.h new file mode 100644 index 00000000000..29ae6f0abb5 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_svg.h @@ -0,0 +1,16 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef BACKEND_SVG_H +#define BACKEND_SVG_H + +#include "potracelib.h" +#include "main.h" + +int page_svg(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); +int page_gimp(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); + +#endif /* BACKEND_SVG_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/backend_xfig.c b/Build/source/libs/potrace/potrace-src/src/backend_xfig.c new file mode 100644 index 00000000000..e0a5f2eb8b8 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_xfig.c @@ -0,0 +1,252 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* The xfig backend of Potrace. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdarg.h> +#include <string.h> +#include <math.h> + +#include "main.h" +#include "backend_xfig.h" +#include "potracelib.h" +#include "lists.h" +#include "auxiliary.h" +#include "trans.h" + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +struct pageformat_s { + const char *name; + int w, h; +}; +typedef struct pageformat_s pageformat_t; + +/* page formats known by xfig, and their dimensions in postscript points */ +static pageformat_t pageformat[] = { + { "A9", 105, 149 }, + { "A8", 149, 211 }, + { "A7", 211, 298 }, + { "A6", 298, 421 }, + { "A5", 421, 595 }, + { "A4", 595, 842 }, + { "A3", 842, 1191 }, + { "A2", 1191, 1685 }, + { "A1", 1685, 2383 }, + { "A0", 2383, 3370 }, + + { "B10", 91, 129 }, + { "B9", 129, 182 }, + { "B8", 182, 258 }, + { "B7", 258, 365 }, + { "B6", 365, 516 }, + { "B5", 516, 730 }, + { "B4", 730, 1032 }, + { "B3", 1032, 1460 }, + { "B2", 1460, 2064 }, + { "B1", 2064, 2920 }, + { "B0", 2920, 4127 }, + + { "Letter", 612, 792 }, + { "Legal", 612, 1008 }, + { "Tabloid", 792, 1224 }, + { "A", 612, 792 }, + { "B", 792, 1224 }, + { "C", 1224, 1584 }, + { "D", 1584, 2448 }, + { "E", 2448, 3168 }, + + { NULL, 0, 0 }, +}; + +/* ---------------------------------------------------------------------- */ +/* path-drawing auxiliary functions */ + +/* coordinate quantization */ +static inline point_t unit(dpoint_t p) { + point_t q; + + q.x = (long)(floor(p.x+.5)); + q.y = (long)(floor(p.y+.5)); + return q; +} + +static void xfig_point(FILE *fout, dpoint_t p, trans_t t) { + point_t q; + + q = unit(trans(p, t)); + + fprintf(fout, "%ld %ld\n", q.x, q.y); +} + +/* ---------------------------------------------------------------------- */ +/* functions for converting a path to a xfig */ + +/* calculate number of xfig control points in this path */ +static int npoints(potrace_curve_t *curve, int m) { + int i; + int n=0; + + for (i=0; i<m; i++) { + switch (curve->tag[i]) { + case POTRACE_CORNER: + n += 1; + break; + case POTRACE_CURVETO: + n += 2; + break; + } + } + return n; +} + +/* do one path. */ +static void xfig_path(FILE *fout, potrace_curve_t *curve, trans_t t, int sign, int depth) { + int i; + dpoint_t *c; + int m = curve->n; + + fprintf(fout, "3 1 0 0 0 %d %d 0 20 0.000 0 0 0 %d\n", sign=='+' ? 32 : 33, depth, npoints(curve, m)); + + for (i=0; i<m; i++) { + c = curve->c[i]; + switch (curve->tag[i]) { + case POTRACE_CORNER: + xfig_point(fout, c[1], t); + break; + case POTRACE_CURVETO: + xfig_point(fout, c[0], t); + xfig_point(fout, c[1], t); + break; + } + } + for (i=0; i<m; i++) { + switch (curve->tag[i]) { + case POTRACE_CORNER: + fprintf(fout, "0\n"); + break; + case POTRACE_CURVETO: + fprintf(fout, "1 1\n"); + break; + } + } +} + +/* render a whole tree */ +static void xfig_write_paths(FILE *fout, potrace_path_t *plist, trans_t t, int depth) { + potrace_path_t *p, *q; + + for (p=plist; p; p=p->sibling) { + xfig_path(fout, &p->curve, t, p->sign, depth); + for (q=p->childlist; q; q=q->sibling) { + xfig_path(fout, &q->curve, t, q->sign, depth >= 1 ? depth-1 : 0); + } + for (q=p->childlist; q; q=q->sibling) { + xfig_write_paths(fout, q->childlist, t, depth >= 2 ? depth-2 : 0); + } + } +} + +/* calculate the depth of a tree. Call with d=0. */ +static int xfig_get_depth(potrace_path_t *plist) { + potrace_path_t *p; + int max =0; + int d; + + for (p=plist; p; p=p->sibling) { + d = xfig_get_depth(p->childlist); + if (d > max) { + max = d; + } + } + return max + 1; +} + +/* ---------------------------------------------------------------------- */ +/* Backend. */ + +/* public interface for XFIG */ +int page_xfig(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo) { + trans_t t; + double origx = imginfo->trans.orig[0] + imginfo->lmar; + double origy = - imginfo->trans.orig[1] - imginfo->bmar + info.paperheight; + const char *formatname; + int best, penalty; + pageformat_t *f; + int i; + int x0, y0, x1, y1; /* in xfig's coordinates */ + int depth; + + t.orig[0] = 1200/72.0 * origx; + t.orig[1] = 1200/72.0 * origy; + t.x[0] = 1200/72.0 * imginfo->trans.x[0]; + t.x[1] = -1200/72.0 * imginfo->trans.x[1]; + t.y[0] = 1200/72.0 * imginfo->trans.y[0]; + t.y[1] = -1200/72.0 * imginfo->trans.y[1]; + + x0 = (int)(1200/72.0 * (origx - imginfo->trans.orig[0])); + y0 = (int)(1200/72.0 * (origy + imginfo->trans.orig[1])); + x1 = x0 + (int)(1200/72.0 * imginfo->trans.bb[0]); + y1 = y0 - (int)(1200/72.0 * imginfo->trans.bb[1]); + + best = -1; + formatname = "Letter"; + + /* find closest page format */ + for (i=0; pageformat[i].name; i++) { + f = &pageformat[i]; + if (f->w >= info.paperwidth-1 && f->h >= info.paperheight-1) { + penalty = f->w + f->h; + if (best == -1 || penalty < best) { + best = penalty; + formatname = f->name; + } + } + } + + /* header */ + fprintf(fout, "#FIG 3.2\n"); + fprintf(fout, "#created by " POTRACE " " VERSION ", written by Peter Selinger 2001-2019\n"); + fprintf(fout, "Portrait\n"); + fprintf(fout, "Center\n"); + fprintf(fout, "Inches\n"); + fprintf(fout, "%s\n", formatname); + fprintf(fout, "100.0\n"); + fprintf(fout, "Single\n"); + fprintf(fout, "-2\n"); + fprintf(fout, "1200 2\n"); /* 1200 pixels per inch */ + fprintf(fout, "0 32 #%06x\n", info.color); + fprintf(fout, "0 33 #%06x\n", info.fillcolor); + fprintf(fout, "6 %d %d %d %d\n", x0-75, y1-35, x1+75, y0+35); /* bounding box */ + + /* determine depth of the tree */ + depth = xfig_get_depth(plist); + + /* figure out appropriate xfig starting depth. Note: xfig only has 1000 depths available */ + if (depth <= 40) { + depth = 50; + } else if (depth < 990) { + depth += 10; + } else { + depth = 999; + } + + /* write paths. Note: can never use "opticurve" with this backend - + it just does not approximate Bezier curves closely enough. */ + xfig_write_paths(fout, plist, t, depth); + + fprintf(fout, "-6\n"); /* end bounding box */ + + fflush(fout); + + return 0; +} diff --git a/Build/source/libs/potrace/potrace-src/src/backend_xfig.h b/Build/source/libs/potrace/potrace-src/src/backend_xfig.h new file mode 100644 index 00000000000..c29de281481 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/backend_xfig.h @@ -0,0 +1,15 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef BACKEND_XFIG_H +#define BACKEND_XFIG_H + +#include "potracelib.h" +#include "main.h" + +int page_xfig(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); + +#endif /* BACKEND_XFIG_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/bbox.c b/Build/source/libs/potrace/potrace-src/src/bbox.c new file mode 100644 index 00000000000..5cc889192e4 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/bbox.c @@ -0,0 +1,154 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* figure out the true bounding box of a vector image */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <math.h> +#include <stdlib.h> + +#include "bbox.h" +#include "potracelib.h" +#include "lists.h" + +/* ---------------------------------------------------------------------- */ +/* intervals */ + +/* initialize the interval to [min, max] */ +static void interval(interval_t *i, double min, double max) { + i->min = min; + i->max = max; +} + +/* initialize the interval to [x, x] */ +static inline void singleton(interval_t *i, double x) { + interval(i, x, x); +} + +/* extend the interval to include the number x */ +static inline void extend(interval_t *i, double x) { + if (x < i->min) { + i->min = x; + } else if (x > i->max) { + i->max = x; + } +} + +static inline int in_interval(interval_t *i, double x) { + return i->min <= x && x <= i->max; +} + +/* ---------------------------------------------------------------------- */ +/* inner product */ + +typedef potrace_dpoint_t dpoint_t; + +static double iprod(dpoint_t a, dpoint_t b) { + return a.x * b.x + a.y * b.y; +} + +/* ---------------------------------------------------------------------- */ +/* linear Bezier segments */ + +/* return a point on a 1-dimensional Bezier segment */ +static inline double bezier(double t, double x0, double x1, double x2, double x3) { + double s = 1-t; + return s*s*s*x0 + 3*(s*s*t)*x1 + 3*(t*t*s)*x2 + t*t*t*x3; +} + +/* Extend the interval i to include the minimum and maximum of a + 1-dimensional Bezier segment given by control points x0..x3. For + efficiency, x0 in i is assumed as a precondition. */ +static void bezier_limits(double x0, double x1, double x2, double x3, interval_t *i) { + double a, b, c, d, r; + double t, x; + + /* the min and max of a cubic curve segment are attained at one of + at most 4 critical points: the 2 endpoints and at most 2 local + extrema. We don't check the first endpoint, because all our + curves are cyclic so it's more efficient not to check endpoints + twice. */ + + /* endpoint */ + extend(i, x3); + + /* optimization: don't bother calculating extrema if all control + points are already in i */ + if (in_interval(i, x1) && in_interval(i, x2)) { + return; + } + + /* solve for extrema. at^2 + bt + c = 0 */ + a = -3*x0 + 9*x1 - 9*x2 + 3*x3; + b = 6*x0 - 12*x1 + 6*x2; + c = -3*x0 + 3*x1; + d = b*b - 4*a*c; + if (d > 0) { + r = sqrt(d); + t = (-b-r)/(2*a); + if (t > 0 && t < 1) { + x = bezier(t, x0, x1, x2, x3); + extend(i, x); + } + t = (-b+r)/(2*a); + if (t > 0 && t < 1) { + x = bezier(t, x0, x1, x2, x3); + extend(i, x); + } + } + return; +} + +/* ---------------------------------------------------------------------- */ +/* Potrace segments, curves, and pathlists */ + +/* extend the interval i to include the inner product <v | dir> for + all points v on the segment. Assume precondition a in i. */ +static inline void segment_limits(int tag, dpoint_t a, dpoint_t c[3], dpoint_t dir, interval_t *i) { + switch (tag) { + case POTRACE_CORNER: + extend(i, iprod(c[1], dir)); + extend(i, iprod(c[2], dir)); + break; + case POTRACE_CURVETO: + bezier_limits(iprod(a, dir), iprod(c[0], dir), iprod(c[1], dir), iprod(c[2], dir), i); + break; + } +} + +/* extend the interval i to include <v | dir> for all points v on the + curve. */ +static void curve_limits(potrace_curve_t *curve, dpoint_t dir, interval_t *i) { + int k; + int n = curve->n; + + segment_limits(curve->tag[0], curve->c[n-1][2], curve->c[0], dir, i); + for (k=1; k<n; k++) { + segment_limits(curve->tag[k], curve->c[k-1][2], curve->c[k], dir, i); + } +} + +/* compute the interval i to be the smallest interval including all <v + | dir> for points in the pathlist. If the pathlist is empty, return + the singleton interval [0,0]. */ +void path_limits(potrace_path_t *path, dpoint_t dir, interval_t *i) { + potrace_path_t *p; + + /* empty image? */ + if (path == NULL) { + interval(i, 0, 0); + return; + } + + /* initialize interval to a point on the first curve */ + singleton(i, iprod(path->curve.c[0][2], dir)); + + /* iterate */ + list_forall(p, path) { + curve_limits(&p->curve, dir, i); + } +} diff --git a/Build/source/libs/potrace/potrace-src/src/bbox.h b/Build/source/libs/potrace/potrace-src/src/bbox.h new file mode 100644 index 00000000000..739a5775010 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/bbox.h @@ -0,0 +1,18 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +#ifndef BBOX_H +#define BBOX_H + +#include "potracelib.h" + +/* an interval [min, max] */ +struct interval_s { + double min, max; +}; +typedef struct interval_s interval_t; + +void path_limits(potrace_path_t *path, potrace_dpoint_t dir, interval_t *i); + +#endif /* BBOX_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/bitmap.h b/Build/source/libs/potrace/potrace-src/src/bitmap.h new file mode 100644 index 00000000000..c5685746896 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/bitmap.h @@ -0,0 +1,228 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +#ifndef BITMAP_H +#define BITMAP_H + +#include <string.h> +#include <stdlib.h> +#include <errno.h> +#include <stddef.h> + +/* The bitmap type is defined in potracelib.h */ +#include "potracelib.h" + +/* The present file defines some convenient macros and static inline + functions for accessing bitmaps. Since they only produce inline + code, they can be conveniently shared by the library and frontends, + if desired */ + +/* ---------------------------------------------------------------------- */ +/* some measurements */ + +#define BM_WORDSIZE ((int)sizeof(potrace_word)) +#define BM_WORDBITS (8*BM_WORDSIZE) +#define BM_HIBIT (((potrace_word)1)<<(BM_WORDBITS-1)) +#define BM_ALLBITS (~(potrace_word)0) + +/* macros for accessing pixel at index (x,y). U* macros omit the + bounds check. */ + +#define bm_scanline(bm, y) ((bm)->map + (ptrdiff_t)(y)*(ptrdiff_t)(bm)->dy) +#define bm_index(bm, x, y) (&bm_scanline(bm, y)[(x)/BM_WORDBITS]) +#define bm_mask(x) (BM_HIBIT >> ((x) & (BM_WORDBITS-1))) +#define bm_range(x, a) ((int)(x) >= 0 && (int)(x) < (a)) +#define bm_safe(bm, x, y) (bm_range(x, (bm)->w) && bm_range(y, (bm)->h)) +#define BM_UGET(bm, x, y) ((*bm_index(bm, x, y) & bm_mask(x)) != 0) +#define BM_USET(bm, x, y) (*bm_index(bm, x, y) |= bm_mask(x)) +#define BM_UCLR(bm, x, y) (*bm_index(bm, x, y) &= ~bm_mask(x)) +#define BM_UINV(bm, x, y) (*bm_index(bm, x, y) ^= bm_mask(x)) +#define BM_UPUT(bm, x, y, b) ((b) ? BM_USET(bm, x, y) : BM_UCLR(bm, x, y)) +#define BM_GET(bm, x, y) (bm_safe(bm, x, y) ? BM_UGET(bm, x, y) : 0) +#define BM_SET(bm, x, y) (bm_safe(bm, x, y) ? BM_USET(bm, x, y) : 0) +#define BM_CLR(bm, x, y) (bm_safe(bm, x, y) ? BM_UCLR(bm, x, y) : 0) +#define BM_INV(bm, x, y) (bm_safe(bm, x, y) ? BM_UINV(bm, x, y) : 0) +#define BM_PUT(bm, x, y, b) (bm_safe(bm, x, y) ? BM_UPUT(bm, x, y, b) : 0) + +/* calculate the size, in bytes, required for the data area of a + bitmap of the given dy and h. Assume h >= 0. Return -1 if the size + does not fit into the ptrdiff_t type. */ +static inline ptrdiff_t getsize(int dy, int h) { + ptrdiff_t size; + + if (dy < 0) { + dy = -dy; + } + + size = (ptrdiff_t)dy * (ptrdiff_t)h * (ptrdiff_t)BM_WORDSIZE; + + /* check for overflow error */ + if (size < 0 || (h != 0 && dy != 0 && size / h / dy != BM_WORDSIZE)) { + return -1; + } + + return size; +} + +/* return the size, in bytes, of the data area of the bitmap. Return + -1 if the size does not fit into the ptrdiff_t type; however, this + cannot happen if the bitmap is well-formed, i.e., if created with + bm_new or bm_dup. */ +static inline ptrdiff_t bm_size(const potrace_bitmap_t *bm) { + return getsize(bm->dy, bm->h); +} + +/* calculate the base address of the bitmap data. Assume that the + bitmap is well-formed, i.e., its size fits into the ptrdiff_t type. + This is the case if created with bm_new or bm_dup. The base address + may differ from bm->map if dy is negative */ +static inline potrace_word *bm_base(const potrace_bitmap_t *bm) { + int dy = bm->dy; + + if (dy >= 0 || bm->h == 0) { + return bm->map; + } else { + return bm_scanline(bm, bm->h - 1); + } +} + +/* free the given bitmap. Leaves errno untouched. */ +static inline void bm_free(potrace_bitmap_t *bm) { + if (bm && bm->map) { + free(bm_base(bm)); + } + free(bm); +} + +/* return new bitmap initialized to 0. NULL with errno on error. + Assumes w, h >= 0. */ +static inline potrace_bitmap_t *bm_new(int w, int h) { + potrace_bitmap_t *bm; + int dy = w == 0 ? 0 : (w - 1) / BM_WORDBITS + 1; + ptrdiff_t size; + + size = getsize(dy, h); + if (size < 0) { + errno = ENOMEM; + return NULL; + } + if (size == 0) { + size = BM_WORDSIZE; /* make sure calloc() doesn't return NULL */ + } + + bm = (potrace_bitmap_t *) malloc(sizeof(potrace_bitmap_t)); + if (!bm) { + return NULL; + } + bm->w = w; + bm->h = h; + bm->dy = dy; + bm->map = (potrace_word *) calloc(1, size); + if (!bm->map) { + free(bm); + return NULL; + } + return bm; +} + +/* clear the given bitmap. Set all bits to c. Assumes a well-formed + bitmap. */ +static inline void bm_clear(potrace_bitmap_t *bm, int c) { + /* Note: if the bitmap was created with bm_new, then it is + guaranteed that size will fit into the ptrdiff_t type. */ + ptrdiff_t size = bm_size(bm); + memset(bm_base(bm), c ? -1 : 0, size); +} + +/* duplicate the given bitmap. Return NULL on error with errno + set. Assumes a well-formed bitmap. */ +static inline potrace_bitmap_t *bm_dup(const potrace_bitmap_t *bm) { + potrace_bitmap_t *bm1 = bm_new(bm->w, bm->h); + int y; + + if (!bm1) { + return NULL; + } + for (y=0; y < bm->h; y++) { + memcpy(bm_scanline(bm1, y), bm_scanline(bm, y), (size_t)bm1->dy * (size_t)BM_WORDSIZE); + } + return bm1; +} + +/* invert the given bitmap. */ +static inline void bm_invert(potrace_bitmap_t *bm) { + int dy = bm->dy; + int y; + int i; + potrace_word *p; + + if (dy < 0) { + dy = -dy; + } + + for (y=0; y < bm->h; y++) { + p = bm_scanline(bm, y); + for (i=0; i < dy; i++) { + p[i] ^= BM_ALLBITS; + } + } +} + +/* turn the given bitmap upside down. This does not move the bitmap + data or change the bm_base() address. */ +static inline void bm_flip(potrace_bitmap_t *bm) { + int dy = bm->dy; + + if (bm->h == 0 || bm->h == 1) { + return; + } + + bm->map = bm_scanline(bm, bm->h - 1); + bm->dy = -dy; +} + +/* resize the bitmap to the given new height. The bitmap data remains + bottom-aligned (truncated at the top) when dy >= 0 and top-aligned + (truncated at the bottom) when dy < 0. Return 0 on success, or 1 on + error with errno set. If the new height is <= the old one, no error + should occur. If the new height is larger, the additional bitmap + data is *not* initialized. */ +static inline int bm_resize(potrace_bitmap_t *bm, int h) { + int dy = bm->dy; + ptrdiff_t newsize; + potrace_word *newmap; + + if (dy < 0) { + bm_flip(bm); + } + + newsize = getsize(dy, h); + if (newsize < 0) { + errno = ENOMEM; + goto error; + } + if (newsize == 0) { + newsize = BM_WORDSIZE; /* make sure realloc() doesn't return NULL */ + } + + newmap = (potrace_word *)realloc(bm->map, newsize); + if (newmap == NULL) { + goto error; + } + bm->map = newmap; + bm->h = h; + + if (dy < 0) { + bm_flip(bm); + } + return 0; + + error: + if (dy < 0) { + bm_flip(bm); + } + return 1; +} + +#endif /* BITMAP_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/bitmap_io.c b/Build/source/libs/potrace/potrace-src/src/bitmap_io.c new file mode 100644 index 00000000000..3e04c2b5e79 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/bitmap_io.c @@ -0,0 +1,886 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* Routines for manipulating bitmaps, including reading pbm files. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#ifdef HAVE_INTTYPES_H +#include <inttypes.h> +#endif + +#include "bitmap.h" +#include "bitops.h" +#include "bitmap_io.h" + +#define INTBITS (8*sizeof(int)) + +static int bm_readbody_bmp(FILE *f, double threshold, potrace_bitmap_t **bmp); +static int bm_readbody_pnm(FILE *f, double threshold, potrace_bitmap_t **bmp, int magic); + +#define TRY(x) if (x) goto try_error +#define TRY_EOF(x) if (x) goto eof +#define TRY_STD(x) if (x) goto std_error + +/* ---------------------------------------------------------------------- */ +/* routines for reading pnm streams */ + +/* read next character after whitespace and comments. Return EOF on + end of file or error. */ +static int fgetc_ws(FILE *f) { + int c; + + while (1) { + c = fgetc(f); + if (c=='#') { + while (1) { + c = fgetc(f); + if (c=='\n' || c==EOF) { + break; + } + } + } + /* space, tab, line feed, carriage return, form-feed */ + if (c!=' ' && c!='\t' && c!='\r' && c!='\n' && c!=12) { + return c; + } + } +} + +/* skip whitespace and comments, then read a non-negative decimal + number from a stream. Return -1 on EOF. Tolerate other errors (skip + bad characters). Do not the read any characters following the + number (put next character back into the stream) */ + +static int readnum(FILE *f) { + int c; + uint64_t acc; + + /* skip whitespace and comments */ + while (1) { + c = fgetc_ws(f); + if (c==EOF) { + return -1; + } + if (c>='0' && c<='9') { + break; + } + } + + /* first digit is already in c */ + acc = c-'0'; + while (1) { + c = fgetc(f); + if (c==EOF) { + break; + } + if (c<'0' || c>'9') { + ungetc(c, f); + break; + } + acc *= 10; + acc += c-'0'; + if (acc > 0x7fffffff) { + return -1; + } + } + return acc; +} + +/* similar to readnum, but read only a single 0 or 1, and do not read + any characters after it. */ + +static int readbit(FILE *f) { + int c; + + /* skip whitespace and comments */ + while (1) { + c = fgetc_ws(f); + if (c==EOF) { + return -1; + } + if (c>='0' && c<='1') { + break; + } + } + + return c-'0'; +} + +/* ---------------------------------------------------------------------- */ + +/* read a PNM stream: P1-P6 format (see pnm(5)), or a BMP stream, and + convert the output to a bitmap. Return bitmap in *bmp. Return 0 on + success, -1 on error with errno set, -2 on bad file format (with + error message in bm_read_error), and 1 on premature end of file, -3 + on empty file (including files which contain only whitespace and + comments), -4 if wrong magic number. If the return value is >=0, + *bmp is valid. */ + +const char *bm_read_error = NULL; + +int bm_read(FILE *f, double threshold, potrace_bitmap_t **bmp) { + int magic[2]; + + /* read magic number. We ignore whitespace and comments before the + magic, for the benefit of concatenated files in P1-P3 format. + Multiple P1-P3 images in a single file are not formally allowed + by the PNM standard, but there is no harm in being lenient. */ + + magic[0] = fgetc_ws(f); + if (magic[0] == EOF) { + return -3; + } + magic[1] = fgetc(f); + if (magic[0] == 'P' && magic[1] >= '1' && magic[1] <= '6') { + return bm_readbody_pnm(f, threshold, bmp, magic[1]); + } + if (magic[0] == 'B' && magic[1] == 'M') { + return bm_readbody_bmp(f, threshold, bmp); + } + return -4; +} + +/* ---------------------------------------------------------------------- */ +/* read PNM format */ + +/* read PNM stream after magic number. Return values as for bm_read */ +static int bm_readbody_pnm(FILE *f, double threshold, potrace_bitmap_t **bmp, int magic) { + potrace_bitmap_t *bm; + int x, y, i, b, b1, sum; + int bpr; /* bytes per row (as opposed to 4*bm->c) */ + int w, h, max; + int realheight; /* in case of incomplete file, keeps track of how + many scan lines actually contain data */ + + bm = NULL; + + w = readnum(f); + if (w<0) { + goto format_error; + } + + h = readnum(f); + if (h<0) { + goto format_error; + } + + /* allocate bitmap */ + bm = bm_new(w, h); + if (!bm) { + goto std_error; + } + + realheight = 0; + + switch (magic) { + default: + /* not reached */ + goto format_error; + + case '1': + /* read P1 format: PBM ascii */ + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + b = readbit(f); + if (b<0) { + goto eof; + } + BM_UPUT(bm, x, y, b); + } + } + break; + + case '2': + /* read P2 format: PGM ascii */ + + max = readnum(f); + if (max<1) { + goto format_error; + } + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + b = readnum(f); + if (b<0) { + goto eof; + } + BM_UPUT(bm, x, y, b > threshold * max ? 0 : 1); + } + } + break; + + case '3': + /* read P3 format: PPM ascii */ + + max = readnum(f); + if (max<1) { + goto format_error; + } + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + sum = 0; + for (i=0; i<3; i++) { + b = readnum(f); + if (b<0) { + goto eof; + } + sum += b; + } + BM_UPUT(bm, x, y, sum > 3 * threshold * max ? 0 : 1); + } + } + break; + + case '4': + /* read P4 format: PBM raw */ + + b = fgetc(f); /* read single white-space character after height */ + if (b==EOF) { + goto format_error; + } + + bpr = (w+7)/8; + + for (y=0; y<h; y++) { + realheight = y+1; + for (i=0; i<bpr; i++) { + b = fgetc(f); + if (b==EOF) { + goto eof; + } + *bm_index(bm, i*8, y) |= ((potrace_word)b) << (8*(BM_WORDSIZE-1-(i % BM_WORDSIZE))); + } + } + break; + + case '5': + /* read P5 format: PGM raw */ + + max = readnum(f); + if (max<1) { + goto format_error; + } + + b = fgetc(f); /* read single white-space character after max */ + if (b==EOF) { + goto format_error; + } + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + b = fgetc(f); + if (b==EOF) + goto eof; + if (max>=256) { + b <<= 8; + b1 = fgetc(f); + if (b1==EOF) + goto eof; + b |= b1; + } + BM_UPUT(bm, x, y, b > threshold * max ? 0 : 1); + } + } + break; + + case '6': + /* read P6 format: PPM raw */ + + max = readnum(f); + if (max<1) { + goto format_error; + } + + b = fgetc(f); /* read single white-space character after max */ + if (b==EOF) { + goto format_error; + } + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + sum = 0; + for (i=0; i<3; i++) { + b = fgetc(f); + if (b==EOF) { + goto eof; + } + if (max>=256) { + b <<= 8; + b1 = fgetc(f); + if (b1==EOF) + goto eof; + b |= b1; + } + sum += b; + } + BM_UPUT(bm, x, y, sum > 3 * threshold * max ? 0 : 1); + } + } + break; + } + + bm_flip(bm); + *bmp = bm; + return 0; + + eof: + TRY_STD(bm_resize(bm, realheight)); + bm_flip(bm); + *bmp = bm; + return 1; + + format_error: + bm_free(bm); + if (magic == '1' || magic == '4') { + bm_read_error = "invalid pbm file"; + } else if (magic == '2' || magic == '5') { + bm_read_error = "invalid pgm file"; + } else { + bm_read_error = "invalid ppm file"; + } + return -2; + + std_error: + bm_free(bm); + return -1; +} + +/* ---------------------------------------------------------------------- */ +/* read BMP format */ + +struct bmp_info_s { + unsigned int FileSize; + unsigned int reserved; + unsigned int DataOffset; + unsigned int InfoSize; + unsigned int w; /* width */ + unsigned int h; /* height */ + unsigned int Planes; + unsigned int bits; /* bits per sample */ + unsigned int comp; /* compression mode */ + unsigned int ImageSize; + unsigned int XpixelsPerM; + unsigned int YpixelsPerM; + unsigned int ncolors; /* number of colors in palette */ + unsigned int ColorsImportant; + unsigned int RedMask; + unsigned int GreenMask; + unsigned int BlueMask; + unsigned int AlphaMask; + unsigned int ctbits; /* sample size for color table */ + int topdown; /* top-down mode? */ +}; +typedef struct bmp_info_s bmp_info_t; + +/* auxiliary */ + +static int bmp_count = 0; /* counter for byte padding */ +static int bmp_pos = 0; /* counter from start of BMP data */ + +/* read n-byte little-endian integer. Return 1 on EOF or error, else + 0. Assume n<=4. */ +static int bmp_readint(FILE *f, int n, unsigned int *p) { + int i; + unsigned int sum = 0; + int b; + + for (i=0; i<n; i++) { + b = fgetc(f); + if (b==EOF) { + return 1; + } + sum += (unsigned)b << (8*i); + } + bmp_count += n; + bmp_pos += n; + *p = sum; + return 0; +} + +/* reset padding boundary */ +static void bmp_pad_reset(void) { + bmp_count = 0; +} + +/* read padding bytes to 4-byte boundary. Return 1 on EOF or error, + else 0. */ +static int bmp_pad(FILE *f) { + int c, i, b; + + c = (-bmp_count) & 3; + for (i=0; i<c; i++) { + b = fgetc(f); + if (b==EOF) { + return 1; + } + } + bmp_pos += c; + bmp_count = 0; + return 0; +} + +/* forward to the new file position. Return 1 on EOF or error, else 0 */ +static int bmp_forward(FILE *f, int pos) { + int b; + + while (bmp_pos < pos) { + b = fgetc(f); + if (b==EOF) { + return 1; + } + bmp_pos++; + bmp_count++; + } + return 0; +} + +/* safe colortable access */ +#define COLTABLE(c) ((c) < bmpinfo.ncolors ? coltable[(c)] : 0) + +/* read BMP stream after magic number. Return values as for bm_read. + We choose to be as permissive as possible, since there are many + programs out there which produce BMP. For instance, ppmtobmp can + produce codings with anywhere from 1-8 or 24 bits per sample, + although most specifications only allow 1,4,8,24,32. We can also + read both the old and new OS/2 BMP formats in addition to the + Windows BMP format. */ +static int bm_readbody_bmp(FILE *f, double threshold, potrace_bitmap_t **bmp) { + bmp_info_t bmpinfo; + int *coltable; + unsigned int b, c; + unsigned int i; + potrace_bitmap_t *bm; + int mask; + unsigned int x, y; + int col[2]; + unsigned int bitbuf; + unsigned int n; + unsigned int redshift, greenshift, blueshift; + int col1[2]; + int realheight; /* in case of incomplete file, keeps track of how + many scan lines actually contain data */ + + bm_read_error = NULL; + bm = NULL; + coltable = NULL; + + bmp_pos = 2; /* set file position */ + + /* file header (minus magic number) */ + TRY(bmp_readint(f, 4, &bmpinfo.FileSize)); + TRY(bmp_readint(f, 4, &bmpinfo.reserved)); + TRY(bmp_readint(f, 4, &bmpinfo.DataOffset)); + + /* info header */ + TRY(bmp_readint(f, 4, &bmpinfo.InfoSize)); + if (bmpinfo.InfoSize == 40 || bmpinfo.InfoSize == 64 + || bmpinfo.InfoSize == 108 || bmpinfo.InfoSize == 124) { + /* Windows or new OS/2 format */ + bmpinfo.ctbits = 32; /* sample size in color table */ + TRY(bmp_readint(f, 4, &bmpinfo.w)); + TRY(bmp_readint(f, 4, &bmpinfo.h)); + TRY(bmp_readint(f, 2, &bmpinfo.Planes)); + TRY(bmp_readint(f, 2, &bmpinfo.bits)); + TRY(bmp_readint(f, 4, &bmpinfo.comp)); + TRY(bmp_readint(f, 4, &bmpinfo.ImageSize)); + TRY(bmp_readint(f, 4, &bmpinfo.XpixelsPerM)); + TRY(bmp_readint(f, 4, &bmpinfo.YpixelsPerM)); + TRY(bmp_readint(f, 4, &bmpinfo.ncolors)); + TRY(bmp_readint(f, 4, &bmpinfo.ColorsImportant)); + if (bmpinfo.InfoSize >= 108) { /* V4 and V5 bitmaps */ + TRY(bmp_readint(f, 4, &bmpinfo.RedMask)); + TRY(bmp_readint(f, 4, &bmpinfo.GreenMask)); + TRY(bmp_readint(f, 4, &bmpinfo.BlueMask)); + TRY(bmp_readint(f, 4, &bmpinfo.AlphaMask)); + } + if (bmpinfo.w > 0x7fffffff) { + goto format_error; + } + if (bmpinfo.h > 0x7fffffff) { + bmpinfo.h = (-bmpinfo.h) & 0xffffffff; + bmpinfo.topdown = 1; + } else { + bmpinfo.topdown = 0; + } + if (bmpinfo.h > 0x7fffffff) { + goto format_error; + } + } else if (bmpinfo.InfoSize == 12) { + /* old OS/2 format */ + bmpinfo.ctbits = 24; /* sample size in color table */ + TRY(bmp_readint(f, 2, &bmpinfo.w)); + TRY(bmp_readint(f, 2, &bmpinfo.h)); + TRY(bmp_readint(f, 2, &bmpinfo.Planes)); + TRY(bmp_readint(f, 2, &bmpinfo.bits)); + bmpinfo.comp = 0; + bmpinfo.ncolors = 0; + bmpinfo.topdown = 0; + } else { + goto format_error; + } + + if (bmpinfo.comp == 3 && bmpinfo.InfoSize < 108) { + /* bitfield feature is only understood with V4 and V5 format */ + goto format_error; + } + + if (bmpinfo.comp > 3 || bmpinfo.bits > 32) { + goto format_error; + } + + /* forward to color table (e.g., if bmpinfo.InfoSize == 64) */ + TRY(bmp_forward(f, 14+bmpinfo.InfoSize)); + + if (bmpinfo.Planes != 1) { + bm_read_error = "cannot handle bmp planes"; + goto format_error; /* can't handle planes */ + } + + if (bmpinfo.ncolors == 0 && bmpinfo.bits <= 8) { + bmpinfo.ncolors = 1 << bmpinfo.bits; + } + + /* color table, present only if bmpinfo.bits <= 8. */ + if (bmpinfo.bits <= 8) { + coltable = (int *) calloc(bmpinfo.ncolors, sizeof(int)); + if (!coltable) { + goto std_error; + } + /* NOTE: since we are reading a bitmap, we can immediately convert + the color table entries to bits. */ + for (i=0; i<bmpinfo.ncolors; i++) { + TRY(bmp_readint(f, bmpinfo.ctbits/8, &c)); + c = ((c>>16) & 0xff) + ((c>>8) & 0xff) + (c & 0xff); + coltable[i] = (c > 3 * threshold * 255 ? 0 : 1); + if (i<2) { + col1[i] = c; + } + } + } + + /* forward to data */ + if (bmpinfo.InfoSize != 12) { /* not old OS/2 format */ + TRY(bmp_forward(f, bmpinfo.DataOffset)); + } + + /* allocate bitmap */ + bm = bm_new(bmpinfo.w, bmpinfo.h); + if (!bm) { + goto std_error; + } + + realheight = 0; + + switch (bmpinfo.bits + 0x100*bmpinfo.comp) { + + default: + goto format_error; + break; + + case 0x001: /* monochrome palette */ + if (col1[0] < col1[1]) { /* make the darker color black */ + mask = 0xff; + } else { + mask = 0; + } + + /* raster data */ + for (y=0; y<bmpinfo.h; y++) { + realheight = y+1; + bmp_pad_reset(); + for (i=0; 8*i<bmpinfo.w; i++) { + TRY_EOF(bmp_readint(f, 1, &b)); + b ^= mask; + *bm_index(bm, i*8, y) |= ((potrace_word)b) << (8*(BM_WORDSIZE-1-(i % BM_WORDSIZE))); + } + TRY(bmp_pad(f)); + } + break; + + case 0x002: /* 2-bit to 8-bit palettes */ + case 0x003: + case 0x004: + case 0x005: + case 0x006: + case 0x007: + case 0x008: + for (y=0; y<bmpinfo.h; y++) { + realheight = y+1; + bmp_pad_reset(); + bitbuf = 0; /* bit buffer: bits in buffer are high-aligned */ + n = 0; /* number of bits currently in bitbuffer */ + for (x=0; x<bmpinfo.w; x++) { + if (n < bmpinfo.bits) { + TRY_EOF(bmp_readint(f, 1, &b)); + bitbuf |= b << (INTBITS - 8 - n); + n += 8; + } + b = bitbuf >> (INTBITS - bmpinfo.bits); + bitbuf <<= bmpinfo.bits; + n -= bmpinfo.bits; + BM_UPUT(bm, x, y, COLTABLE(b)); + } + TRY(bmp_pad(f)); + } + break; + + case 0x010: /* 16-bit encoding */ + /* can't do this format because it is not well-documented and I + don't have any samples */ + bm_read_error = "cannot handle bmp 16-bit coding"; + goto format_error; + break; + + case 0x018: /* 24-bit encoding */ + case 0x020: /* 32-bit encoding */ + for (y=0; y<bmpinfo.h; y++) { + realheight = y+1; + bmp_pad_reset(); + for (x=0; x<bmpinfo.w; x++) { + TRY_EOF(bmp_readint(f, bmpinfo.bits/8, &c)); + c = ((c>>16) & 0xff) + ((c>>8) & 0xff) + (c & 0xff); + BM_UPUT(bm, x, y, c > 3 * threshold * 255 ? 0 : 1); + } + TRY(bmp_pad(f)); + } + break; + + case 0x320: /* 32-bit encoding with bitfields */ + if (bmpinfo.RedMask == 0 || bmpinfo.GreenMask == 0 || bmpinfo.BlueMask == 0) { + goto format_error; + } + + redshift = lobit(bmpinfo.RedMask); + greenshift = lobit(bmpinfo.GreenMask); + blueshift = lobit(bmpinfo.BlueMask); + + for (y=0; y<bmpinfo.h; y++) { + realheight = y+1; + bmp_pad_reset(); + for (x=0; x<bmpinfo.w; x++) { + TRY_EOF(bmp_readint(f, bmpinfo.bits/8, &c)); + c = ((c & bmpinfo.RedMask) >> redshift) + ((c & bmpinfo.GreenMask) >> greenshift) + ((c & bmpinfo.BlueMask) >> blueshift); + BM_UPUT(bm, x, y, c > 3 * threshold * 255 ? 0 : 1); + } + TRY(bmp_pad(f)); + } + break; + + case 0x204: /* 4-bit runlength compressed encoding (RLE4) */ + x = 0; + y = 0; + + while (1) { + TRY_EOF(bmp_readint(f, 1, &b)); /* opcode */ + TRY_EOF(bmp_readint(f, 1, &c)); /* argument */ + if (b>0) { + /* repeat count */ + col[0] = COLTABLE((c>>4) & 0xf); + col[1] = COLTABLE(c & 0xf); + for (i=0; i<b && x<bmpinfo.w; i++) { + if (x>=bmpinfo.w) { + x=0; + y++; + } + if (x>=bmpinfo.w || y>=bmpinfo.h) { + break; + } + realheight = y+1; + BM_PUT(bm, x, y, col[i&1]); + x++; + } + } else if (c == 0) { + /* end of line */ + y++; + x = 0; + } else if (c == 1) { + /* end of bitmap */ + break; + } else if (c == 2) { + /* "delta": skip pixels in x and y directions */ + TRY_EOF(bmp_readint(f, 1, &b)); /* x offset */ + TRY_EOF(bmp_readint(f, 1, &c)); /* y offset */ + x += b; + y += c; + } else { + /* verbatim segment */ + for (i=0; i<c; i++) { + if ((i&1)==0) { + TRY_EOF(bmp_readint(f, 1, &b)); + } + if (x>=bmpinfo.w) { + x=0; + y++; + } + if (x>=bmpinfo.w || y>=bmpinfo.h) { + break; + } + realheight = y+1; + BM_PUT(bm, x, y, COLTABLE((b>>(4-4*(i&1))) & 0xf)); + x++; + } + if ((c+1) & 2) { + /* pad to 16-bit boundary */ + TRY_EOF(bmp_readint(f, 1, &b)); + } + } + } + break; + + case 0x108: /* 8-bit runlength compressed encoding (RLE8) */ + x = 0; + y = 0; + while (1) { + TRY_EOF(bmp_readint(f, 1, &b)); /* opcode */ + TRY_EOF(bmp_readint(f, 1, &c)); /* argument */ + if (b>0) { + /* repeat count */ + for (i=0; i<b; i++) { + if (x>=bmpinfo.w) { + x=0; + y++; + } + if (x>=bmpinfo.w || y>=bmpinfo.h) { + break; + } + realheight = y+1; + BM_PUT(bm, x, y, COLTABLE(c)); + x++; + } + } else if (c == 0) { + /* end of line */ + y++; + x = 0; + } else if (c == 1) { + /* end of bitmap */ + break; + } else if (c == 2) { + /* "delta": skip pixels in x and y directions */ + TRY_EOF(bmp_readint(f, 1, &b)); /* x offset */ + TRY_EOF(bmp_readint(f, 1, &c)); /* y offset */ + x += b; + y += c; + } else { + /* verbatim segment */ + for (i=0; i<c; i++) { + TRY_EOF(bmp_readint(f, 1, &b)); + if (x>=bmpinfo.w) { + x=0; + y++; + } + if (x>=bmpinfo.w || y>=bmpinfo.h) { + break; + } + realheight = y+1; + BM_PUT(bm, x, y, COLTABLE(b)); + x++; + } + if (c & 1) { + /* pad input to 16-bit boundary */ + TRY_EOF(bmp_readint(f, 1, &b)); + } + } + } + break; + + } /* switch */ + + /* skip any potential junk after the data section, but don't + complain in case EOF is encountered */ + bmp_forward(f, bmpinfo.FileSize); + + free(coltable); + if (bmpinfo.topdown) { + bm_flip(bm); + } + *bmp = bm; + return 0; + + eof: + TRY_STD(bm_resize(bm, realheight)); + free(coltable); + if (bmpinfo.topdown) { + bm_flip(bm); + } + *bmp = bm; + return 1; + + format_error: + try_error: + free(coltable); + bm_free(bm); + if (!bm_read_error) { + bm_read_error = "invalid bmp file"; + } + return -2; + + std_error: + free(coltable); + bm_free(bm); + return -1; +} + +/* ---------------------------------------------------------------------- */ +/* output pbm format */ + +void bm_writepbm(FILE *f, potrace_bitmap_t *bm) { + int w, h, bpr, y, i, c; + + w = bm->w; + h = bm->h; + + bpr = (w+7)/8; + + fprintf(f, "P4\n%d %d\n", w, h); + for (y=h-1; y>=0; y--) { + for (i=0; i<bpr; i++) { + c = (*bm_index(bm, i*8, y) >> (8*(BM_WORDSIZE-1-(i % BM_WORDSIZE)))) & 0xff; + fputc(c, f); + } + } + return; +} + +/* ---------------------------------------------------------------------- */ +/* output - for primitive debugging purposes only! */ + +/* print bitmap to screen */ +int bm_print(FILE *f, potrace_bitmap_t *bm) { + int x, y; + int xx, yy; + int d; + int sw, sh; + + sw = bm->w < 79 ? bm->w : 79; + sh = bm->w < 79 ? bm->h : bm->h*sw*44/(79*bm->w); + + for (yy=sh-1; yy>=0; yy--) { + for (xx=0; xx<sw; xx++) { + d=0; + for (x=xx*bm->w/sw; x<(xx+1)*bm->w/sw; x++) { + for (y=yy*bm->h/sh; y<(yy+1)*bm->h/sh; y++) { + if (BM_GET(bm, x, y)) { + d++; + } + } + } + fputc(d ? '*' : ' ', f); + } + fputc('\n', f); + } + return 0; +} + diff --git a/Build/source/libs/potrace/potrace-src/src/bitmap_io.h b/Build/source/libs/potrace/potrace-src/src/bitmap_io.h new file mode 100644 index 00000000000..603dbff032b --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/bitmap_io.h @@ -0,0 +1,23 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* bitmap input/output functions */ + +#ifndef BITMAP_IO_H +#define BITMAP_IO_H + +#include <stdio.h> +#include "bitmap.h" + +/* Note that bitmaps are stored bottom to top, i.e., the first + scanline is the bottom-most one */ + +extern const char *bm_read_error; + +int bm_read(FILE *f, double blacklevel, potrace_bitmap_t **bmp); +void bm_writepbm(FILE *f, potrace_bitmap_t *bm); +int bm_print(FILE *f, potrace_bitmap_t *bm); + +#endif /* BITMAP_IO_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/bitops.h b/Build/source/libs/potrace/potrace-src/src/bitops.h new file mode 100644 index 00000000000..96cf6cc8d47 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/bitops.h @@ -0,0 +1,83 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* bits.h: this file defines some macros for bit manipulations. We + provide a generic implementation, as well as machine- and + compiler-specific fast implementations */ + +/* lobit: return the position of the rightmost "1" bit of an int, or + 32 if none. hibit: return 1 + the position of the leftmost "1" bit + of an int, or 0 if none. Note: these functions work on 32-bit + integers. */ + +#ifndef BITOPS_H +#define BITOPS_H + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +/* ---------------------------------------------------------------------- */ +/* machine specific macros */ + +#if defined(HAVE_I386) + +static inline unsigned int lobit(unsigned int x) { + unsigned int res; + asm ("bsf %1,%0\n\t" + "jnz 0f\n\t" + "movl $32,%0\n" + "0:" + : "=r" (res) + : "r" (x) + : "cc"); + return res; +} + +static inline unsigned int hibit(unsigned int x) { + unsigned int res; + + asm ("bsr %1,%0\n\t" + "jnz 0f\n\t" + "movl $-1,%0\n" + "0:" + : "=r" (res) + : "r" (x) + : "cc"); + return res+1; +} + +/* ---------------------------------------------------------------------- */ +#else /* generic macros */ + +static inline unsigned int lobit(unsigned int x) { + unsigned int res = 32; + while (x & 0xffffff) { + x <<= 8; + res -= 8; + } + while (x) { + x <<= 1; + res -= 1; + } + return res; +} + +static inline unsigned int hibit(unsigned int x) { + unsigned int res = 0; + while (x > 0xff) { + x >>= 8; + res += 8; + } + while (x) { + x >>= 1; + res += 1; + } + return res; +} + +#endif + +#endif /* BITOPS_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/curve.c b/Build/source/libs/potrace/potrace-src/src/curve.c new file mode 100644 index 00000000000..81e02bb7d2a --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/curve.c @@ -0,0 +1,112 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* private part of the path and curve data structures */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "potracelib.h" +#include "lists.h" +#include "curve.h" + +#define SAFE_CALLOC(var, n, typ) \ + if ((var = (typ *)calloc(n, sizeof(typ))) == NULL) goto calloc_error + +/* ---------------------------------------------------------------------- */ +/* allocate and free path objects */ + +path_t *path_new(void) { + path_t *p = NULL; + privpath_t *priv = NULL; + + SAFE_CALLOC(p, 1, path_t); + memset(p, 0, sizeof(path_t)); + SAFE_CALLOC(priv, 1, privpath_t); + memset(priv, 0, sizeof(privpath_t)); + p->priv = priv; + return p; + + calloc_error: + free(p); + free(priv); + return NULL; +} + +/* free the members of the given curve structure. Leave errno unchanged. */ +static void privcurve_free_members(privcurve_t *curve) { + free(curve->tag); + free(curve->c); + free(curve->vertex); + free(curve->alpha); + free(curve->alpha0); + free(curve->beta); +} + +/* free a path. Leave errno untouched. */ +void path_free(path_t *p) { + if (p) { + if (p->priv) { + free(p->priv->pt); + free(p->priv->lon); + free(p->priv->sums); + free(p->priv->po); + privcurve_free_members(&p->priv->curve); + privcurve_free_members(&p->priv->ocurve); + } + free(p->priv); + /* do not free p->fcurve ! */ + } + free(p); +} + +/* free a pathlist, leaving errno untouched. */ +void pathlist_free(path_t *plist) { + path_t *p; + + list_forall_unlink(p, plist) { + path_free(p); + } +} + +/* ---------------------------------------------------------------------- */ +/* initialize and finalize curve structures */ + +typedef dpoint_t dpoint3_t[3]; + +/* initialize the members of the given curve structure to size m. + Return 0 on success, 1 on error with errno set. */ +int privcurve_init(privcurve_t *curve, int n) { + memset(curve, 0, sizeof(privcurve_t)); + curve->n = n; + SAFE_CALLOC(curve->tag, n, int); + SAFE_CALLOC(curve->c, n, dpoint3_t); + SAFE_CALLOC(curve->vertex, n, dpoint_t); + SAFE_CALLOC(curve->alpha, n, double); + SAFE_CALLOC(curve->alpha0, n, double); + SAFE_CALLOC(curve->beta, n, double); + return 0; + + calloc_error: + free(curve->tag); + free(curve->c); + free(curve->vertex); + free(curve->alpha); + free(curve->alpha0); + free(curve->beta); + return 1; +} + +/* copy private to public curve structure */ +void privcurve_to_curve(privcurve_t *pc, potrace_curve_t *c) { + c->n = pc->n; + c->tag = pc->tag; + c->c = pc->c; +} + diff --git a/Build/source/libs/potrace/potrace-src/src/curve.h b/Build/source/libs/potrace/potrace-src/src/curve.h new file mode 100644 index 00000000000..fa18a93d216 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/curve.h @@ -0,0 +1,77 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +#ifndef CURVE_H +#define CURVE_H + +#include "auxiliary.h" + +/* vertex is c[1] for tag=POTRACE_CORNER, and the intersection of + .c[-1][2]..c[0] and c[1]..c[2] for tag=POTRACE_CURVETO. alpha is only + defined for tag=POTRACE_CURVETO and is the alpha parameter of the curve: + .c[-1][2]..c[0] = alpha*(.c[-1][2]..vertex), and + c[2]..c[1] = alpha*(c[2]..vertex). + Beta is so that (.beta[i])[.vertex[i],.vertex[i+1]] = .c[i][2]. +*/ + +struct privcurve_s { + int n; /* number of segments */ + int *tag; /* tag[n]: POTRACE_CORNER or POTRACE_CURVETO */ + dpoint_t (*c)[3]; /* c[n][i]: control points. + c[n][0] is unused for tag[n]=POTRACE_CORNER */ + /* the remainder of this structure is special to privcurve, and is + used in EPS debug output and special EPS "short coding". These + fields are valid only if "alphacurve" is set. */ + int alphacurve; /* have the following fields been initialized? */ + dpoint_t *vertex; /* for POTRACE_CORNER, this equals c[1] */ + double *alpha; /* only for POTRACE_CURVETO */ + double *alpha0; /* "uncropped" alpha parameter - for debug output only */ + double *beta; +}; +typedef struct privcurve_s privcurve_t; + +struct sums_s { + double x; + double y; + double x2; + double xy; + double y2; +}; +typedef struct sums_s sums_t; + +/* the path structure is filled in with information about a given path + as it is accumulated and passed through the different stages of the + Potrace algorithm. Backends only need to read the fcurve and fm + fields of this data structure, but debugging backends may read + other fields. */ +struct potrace_privpath_s { + int len; + point_t *pt; /* pt[len]: path as extracted from bitmap */ + int *lon; /* lon[len]: (i,lon[i]) = longest straight line from i */ + + int x0, y0; /* origin for sums */ + sums_t *sums; /* sums[len+1]: cache for fast summing */ + + int m; /* length of optimal polygon */ + int *po; /* po[m]: optimal polygon */ + + privcurve_t curve; /* curve[m]: array of curve elements */ + privcurve_t ocurve; /* ocurve[om]: array of curve elements */ + privcurve_t *fcurve; /* final curve: this points to either curve or + ocurve. Do not free this separately. */ +}; +typedef struct potrace_privpath_s potrace_privpath_t; + +/* shorter names */ +typedef potrace_privpath_t privpath_t; +typedef potrace_path_t path_t; + +path_t *path_new(void); +void path_free(path_t *p); +void pathlist_free(path_t *plist); +int privcurve_init(privcurve_t *curve, int n); +void privcurve_to_curve(privcurve_t *pc, potrace_curve_t *c); + +#endif /* CURVE_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/decompose.c b/Build/source/libs/potrace/potrace-src/src/decompose.c new file mode 100644 index 00000000000..ae72850efb2 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/decompose.c @@ -0,0 +1,521 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <limits.h> +#ifdef HAVE_INTTYPES_H +#include <inttypes.h> +#endif + +#include "potracelib.h" +#include "curve.h" +#include "lists.h" +#include "bitmap.h" +#include "decompose.h" +#include "progress.h" + +/* ---------------------------------------------------------------------- */ +/* deterministically and efficiently hash (x,y) into a pseudo-random bit */ + +static inline int detrand(int x, int y) { + unsigned int z; + static const unsigned char t[256] = { + /* non-linear sequence: constant term of inverse in GF(8), + mod x^8+x^4+x^3+x+1 */ + 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, + 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, + 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, + 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, + 0, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, + 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, + 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, + 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, + 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, + 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, + 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, + }; + + /* 0x04b3e375 and 0x05a8ef93 are chosen to contain every possible + 5-bit sequence */ + z = ((0x04b3e375 * x) ^ y) * 0x05a8ef93; + z = t[z & 0xff] ^ t[(z>>8) & 0xff] ^ t[(z>>16) & 0xff] ^ t[(z>>24) & 0xff]; + return z; +} + +/* ---------------------------------------------------------------------- */ +/* auxiliary bitmap manipulations */ + +/* set the excess padding to 0 */ +static void bm_clearexcess(potrace_bitmap_t *bm) { + potrace_word mask; + int y; + + if (bm->w % BM_WORDBITS != 0) { + mask = BM_ALLBITS << (BM_WORDBITS - (bm->w % BM_WORDBITS)); + for (y=0; y<bm->h; y++) { + *bm_index(bm, bm->w, y) &= mask; + } + } +} + +struct bbox_s { + int x0, x1, y0, y1; /* bounding box */ +}; +typedef struct bbox_s bbox_t; + +/* clear the bm, assuming the bounding box is set correctly (faster + than clearing the whole bitmap) */ +static void clear_bm_with_bbox(potrace_bitmap_t *bm, bbox_t *bbox) { + int imin = (bbox->x0 / BM_WORDBITS); + int imax = ((bbox->x1 + BM_WORDBITS-1) / BM_WORDBITS); + int i, y; + + for (y=bbox->y0; y<bbox->y1; y++) { + for (i=imin; i<imax; i++) { + bm_scanline(bm, y)[i] = 0; + } + } +} + +/* ---------------------------------------------------------------------- */ +/* auxiliary functions */ + +/* return the "majority" value of bitmap bm at intersection (x,y). We + assume that the bitmap is balanced at "radius" 1. */ +static int majority(potrace_bitmap_t *bm, int x, int y) { + int i, a, ct; + + for (i=2; i<5; i++) { /* check at "radius" i */ + ct = 0; + for (a=-i+1; a<=i-1; a++) { + ct += BM_GET(bm, x+a, y+i-1) ? 1 : -1; + ct += BM_GET(bm, x+i-1, y+a-1) ? 1 : -1; + ct += BM_GET(bm, x+a-1, y-i) ? 1 : -1; + ct += BM_GET(bm, x-i, y+a) ? 1 : -1; + } + if (ct>0) { + return 1; + } else if (ct<0) { + return 0; + } + } + return 0; +} + +/* ---------------------------------------------------------------------- */ +/* decompose image into paths */ + +/* efficiently invert bits [x,infty) and [xa,infty) in line y. Here xa + must be a multiple of BM_WORDBITS. */ +static void xor_to_ref(potrace_bitmap_t *bm, int x, int y, int xa) { + int xhi = x & -BM_WORDBITS; + int xlo = x & (BM_WORDBITS-1); /* = x % BM_WORDBITS */ + int i; + + if (xhi<xa) { + for (i = xhi; i < xa; i+=BM_WORDBITS) { + *bm_index(bm, i, y) ^= BM_ALLBITS; + } + } else { + for (i = xa; i < xhi; i+=BM_WORDBITS) { + *bm_index(bm, i, y) ^= BM_ALLBITS; + } + } + /* note: the following "if" is needed because x86 treats a<<b as + a<<(b&31). I spent hours looking for this bug. */ + if (xlo) { + *bm_index(bm, xhi, y) ^= (BM_ALLBITS << (BM_WORDBITS - xlo)); + } +} + +/* a path is represented as an array of points, which are thought to + lie on the corners of pixels (not on their centers). The path point + (x,y) is the lower left corner of the pixel (x,y). Paths are + represented by the len/pt components of a path_t object (which + also stores other information about the path) */ + +/* xor the given pixmap with the interior of the given path. Note: the + path must be within the dimensions of the pixmap. */ +static void xor_path(potrace_bitmap_t *bm, path_t *p) { + int xa, x, y, k, y1; + + if (p->priv->len <= 0) { /* a path of length 0 is silly, but legal */ + return; + } + + y1 = p->priv->pt[p->priv->len-1].y; + + xa = p->priv->pt[0].x & -BM_WORDBITS; + for (k=0; k<p->priv->len; k++) { + x = p->priv->pt[k].x; + y = p->priv->pt[k].y; + + if (y != y1) { + /* efficiently invert the rectangle [x,xa] x [y,y1] */ + xor_to_ref(bm, x, min(y,y1), xa); + y1 = y; + } + } +} + +/* Find the bounding box of a given path. Path is assumed to be of + non-zero length. */ +static void setbbox_path(bbox_t *bbox, path_t *p) { + int x, y; + int k; + + bbox->y0 = INT_MAX; + bbox->y1 = 0; + bbox->x0 = INT_MAX; + bbox->x1 = 0; + + for (k=0; k<p->priv->len; k++) { + x = p->priv->pt[k].x; + y = p->priv->pt[k].y; + + if (x < bbox->x0) { + bbox->x0 = x; + } + if (x > bbox->x1) { + bbox->x1 = x; + } + if (y < bbox->y0) { + bbox->y0 = y; + } + if (y > bbox->y1) { + bbox->y1 = y; + } + } +} + +/* compute a path in the given pixmap, separating black from white. + Start path at the point (x0,x1), which must be an upper left corner + of the path. Also compute the area enclosed by the path. Return a + new path_t object, or NULL on error (note that a legitimate path + cannot have length 0). Sign is required for correct interpretation + of turnpolicies. */ +static path_t *findpath(potrace_bitmap_t *bm, int x0, int y0, int sign, int turnpolicy) { + int x, y, dirx, diry, len, size; + uint64_t area; + int c, d, tmp; + point_t *pt, *pt1; + path_t *p = NULL; + + x = x0; + y = y0; + dirx = 0; + diry = -1; + + len = size = 0; + pt = NULL; + area = 0; + + while (1) { + /* add point to path */ + if (len>=size) { + size += 100; + size = (int)(1.3 * size); + pt1 = (point_t *)realloc(pt, size * sizeof(point_t)); + if (!pt1) { + goto error; + } + pt = pt1; + } + pt[len].x = x; + pt[len].y = y; + len++; + + /* move to next point */ + x += dirx; + y += diry; + area += x*diry; + + /* path complete? */ + if (x==x0 && y==y0) { + break; + } + + /* determine next direction */ + c = BM_GET(bm, x + (dirx+diry-1)/2, y + (diry-dirx-1)/2); + d = BM_GET(bm, x + (dirx-diry-1)/2, y + (diry+dirx-1)/2); + + if (c && !d) { /* ambiguous turn */ + if (turnpolicy == POTRACE_TURNPOLICY_RIGHT + || (turnpolicy == POTRACE_TURNPOLICY_BLACK && sign == '+') + || (turnpolicy == POTRACE_TURNPOLICY_WHITE && sign == '-') + || (turnpolicy == POTRACE_TURNPOLICY_RANDOM && detrand(x,y)) + || (turnpolicy == POTRACE_TURNPOLICY_MAJORITY && majority(bm, x, y)) + || (turnpolicy == POTRACE_TURNPOLICY_MINORITY && !majority(bm, x, y))) { + tmp = dirx; /* right turn */ + dirx = diry; + diry = -tmp; + } else { + tmp = dirx; /* left turn */ + dirx = -diry; + diry = tmp; + } + } else if (c) { /* right turn */ + tmp = dirx; + dirx = diry; + diry = -tmp; + } else if (!d) { /* left turn */ + tmp = dirx; + dirx = -diry; + diry = tmp; + } + } /* while this path */ + + /* allocate new path object */ + p = path_new(); + if (!p) { + goto error; + } + + p->priv->pt = pt; + p->priv->len = len; + p->area = area <= INT_MAX ? area : INT_MAX; /* avoid overflow */ + p->sign = sign; + + return p; + + error: + free(pt); + return NULL; +} + +/* Give a tree structure to the given path list, based on "insideness" + testing. I.e., path A is considered "below" path B if it is inside + path B. The input pathlist is assumed to be ordered so that "outer" + paths occur before "inner" paths. The tree structure is stored in + the "childlist" and "sibling" components of the path_t + structure. The linked list structure is also changed so that + negative path components are listed immediately after their + positive parent. Note: some backends may ignore the tree + structure, others may use it e.g. to group path components. We + assume that in the input, point 0 of each path is an "upper left" + corner of the path, as returned by bm_to_pathlist. This makes it + easy to find an "interior" point. The bm argument should be a + bitmap of the correct size (large enough to hold all the paths), + and will be used as scratch space. Return 0 on success or -1 on + error with errno set. */ + +static void pathlist_to_tree(path_t *plist, potrace_bitmap_t *bm) { + path_t *p, *p1; + path_t *heap, *heap1; + path_t *cur; + path_t *head; + path_t **plist_hook; /* for fast appending to linked list */ + path_t **hook_in, **hook_out; /* for fast appending to linked list */ + bbox_t bbox; + + bm_clear(bm, 0); + + /* save original "next" pointers */ + list_forall(p, plist) { + p->sibling = p->next; + p->childlist = NULL; + } + + heap = plist; + + /* the heap holds a list of lists of paths. Use "childlist" field + for outer list, "next" field for inner list. Each of the sublists + is to be turned into a tree. This code is messy, but it is + actually fast. Each path is rendered exactly once. We use the + heap to get a tail recursive algorithm: the heap holds a list of + pathlists which still need to be transformed. */ + + while (heap) { + /* unlink first sublist */ + cur = heap; + heap = heap->childlist; + cur->childlist = NULL; + + /* unlink first path */ + head = cur; + cur = cur->next; + head->next = NULL; + + /* render path */ + xor_path(bm, head); + setbbox_path(&bbox, head); + + /* now do insideness test for each element of cur; append it to + head->childlist if it's inside head, else append it to + head->next. */ + hook_in=&head->childlist; + hook_out=&head->next; + list_forall_unlink(p, cur) { + if (p->priv->pt[0].y <= bbox.y0) { + list_insert_beforehook(p, hook_out); + /* append the remainder of the list to hook_out */ + *hook_out = cur; + break; + } + if (BM_GET(bm, p->priv->pt[0].x, p->priv->pt[0].y-1)) { + list_insert_beforehook(p, hook_in); + } else { + list_insert_beforehook(p, hook_out); + } + } + + /* clear bm */ + clear_bm_with_bbox(bm, &bbox); + + /* now schedule head->childlist and head->next for further + processing */ + if (head->next) { + head->next->childlist = heap; + heap = head->next; + } + if (head->childlist) { + head->childlist->childlist = heap; + heap = head->childlist; + } + } + + /* copy sibling structure from "next" to "sibling" component */ + p = plist; + while (p) { + p1 = p->sibling; + p->sibling = p->next; + p = p1; + } + + /* reconstruct a new linked list ("next") structure from tree + ("childlist", "sibling") structure. This code is slightly messy, + because we use a heap to make it tail recursive: the heap + contains a list of childlists which still need to be + processed. */ + heap = plist; + if (heap) { + heap->next = NULL; /* heap is a linked list of childlists */ + } + plist = NULL; + plist_hook = &plist; + while (heap) { + heap1 = heap->next; + for (p=heap; p; p=p->sibling) { + /* p is a positive path */ + /* append to linked list */ + list_insert_beforehook(p, plist_hook); + + /* go through its children */ + for (p1=p->childlist; p1; p1=p1->sibling) { + /* append to linked list */ + list_insert_beforehook(p1, plist_hook); + /* append its childlist to heap, if non-empty */ + if (p1->childlist) { + list_append(path_t, heap1, p1->childlist); + } + } + } + heap = heap1; + } + + return; +} + +/* find the next set pixel in a row <= y. Pixels are searched first + left-to-right, then top-down. In other words, (x,y)<(x',y') if y>y' + or y=y' and x<x'. If found, return 0 and store pixel in + (*xp,*yp). Else return 1. Note that this function assumes that + excess bytes have been cleared with bm_clearexcess. */ +static int findnext(potrace_bitmap_t *bm, int *xp, int *yp) { + int x; + int y; + int x0; + + x0 = (*xp) & ~(BM_WORDBITS-1); + + for (y=*yp; y>=0; y--) { + for (x=x0; x<bm->w && x>=0; x+=(unsigned)BM_WORDBITS) { + if (*bm_index(bm, x, y)) { + while (!BM_GET(bm, x, y)) { + x++; + } + /* found */ + *xp = x; + *yp = y; + return 0; + } + } + x0 = 0; + } + /* not found */ + return 1; +} + +/* Decompose the given bitmap into paths. Returns a linked list of + path_t objects with the fields len, pt, area, sign filled + in. Returns 0 on success with plistp set, or -1 on error with errno + set. */ + +int bm_to_pathlist(const potrace_bitmap_t *bm, path_t **plistp, const potrace_param_t *param, progress_t *progress) { + int x; + int y; + path_t *p; + path_t *plist = NULL; /* linked list of path objects */ + path_t **plist_hook = &plist; /* used to speed up appending to linked list */ + potrace_bitmap_t *bm1 = NULL; + int sign; + + bm1 = bm_dup(bm); + if (!bm1) { + goto error; + } + + /* be sure the byte padding on the right is set to 0, as the fast + pixel search below relies on it */ + bm_clearexcess(bm1); + + /* iterate through components */ + x = 0; + y = bm1->h - 1; + while (findnext(bm1, &x, &y) == 0) { + /* calculate the sign by looking at the original */ + sign = BM_GET(bm, x, y) ? '+' : '-'; + + /* calculate the path */ + p = findpath(bm1, x, y+1, sign, param->turnpolicy); + if (p==NULL) { + goto error; + } + + /* update buffered image */ + xor_path(bm1, p); + + /* if it's a turd, eliminate it, else append it to the list */ + if (p->area <= param->turdsize) { + path_free(p); + } else { + list_insert_beforehook(p, plist_hook); + } + + if (bm1->h > 0) { /* to be sure */ + progress_update(1-y/(double)bm1->h, progress); + } + } + + pathlist_to_tree(plist, bm1); + bm_free(bm1); + *plistp = plist; + + progress_update(1.0, progress); + + return 0; + + error: + bm_free(bm1); + list_forall_unlink(p, plist) { + path_free(p); + } + return -1; +} diff --git a/Build/source/libs/potrace/potrace-src/src/decompose.h b/Build/source/libs/potrace/potrace-src/src/decompose.h new file mode 100644 index 00000000000..584b383ef90 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/decompose.h @@ -0,0 +1,16 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef DECOMPOSE_H +#define DECOMPOSE_H + +#include "potracelib.h" +#include "progress.h" +#include "curve.h" + +int bm_to_pathlist(const potrace_bitmap_t *bm, path_t **plistp, const potrace_param_t *param, progress_t *progress); + +#endif /* DECOMPOSE_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/flate.c b/Build/source/libs/potrace/potrace-src/src/flate.c new file mode 100644 index 00000000000..0df9759569f --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/flate.c @@ -0,0 +1,380 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* the PostScript compression module of Potrace. The basic interface + is through the *_xship function, which processes a byte array and + outputs it in compressed or verbatim form, depending on whether + filter is 1 or 0. To flush the output, simply call with the empty + string and filter=0. filter=2 is used to output encoded text but + without the PostScript header to turn on the encoding. Each + function has variants for shipping a single character, a + null-terminated string, or a byte array. */ + +/* different compression algorithms are available. There is + dummy_xship, which is just the identity, and flate_xship, which + uses zlib compression. Also, lzw_xship provides LZW compression + from the file lzw.c/h. a85_xship provides a85-encoding without + compression. Each function returns the actual number of characters + written. */ + +/* note: the functions provided here have global state and are not + reentrant */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <errno.h> + +#ifdef HAVE_ZLIB +#include <zlib.h> +#endif + +#include "flate.h" +#include "lzw.h" + +#define OUTSIZE 1000 + +static int a85init(FILE *f); +static int a85finish(FILE *f); +static int a85write(FILE *f, const char *buf, int n); +static int a85out(FILE *f, int n); +static int a85spool(FILE *f, char c); + +/* ---------------------------------------------------------------------- */ +/* dummy interface: no encoding */ + +int dummy_xship(FILE *f, int filter, const char *s, int len) { + fwrite(s, 1, len, f); + return len; +} + +/* ---------------------------------------------------------------------- */ +/* flate interface: zlib (=postscript level 3) compression and a85 */ + +#ifdef HAVE_ZLIB + +int pdf_xship(FILE *f, int filter, const char *s, int len) { + static int fstate = 0; + static z_stream c_stream; + char outbuf[OUTSIZE]; + int err; + int n=0; + + if (filter && !fstate) { + /* switch on filtering */ + c_stream.zalloc = Z_NULL; + c_stream.zfree = Z_NULL; + c_stream.opaque = Z_NULL; + err = deflateInit(&c_stream, 9); + if (err != Z_OK) { + fprintf(stderr, "deflateInit: %s (%d)\n", c_stream.msg, err); + exit(2); + } + c_stream.avail_in = 0; + fstate = 1; + } else if (!filter && fstate) { + /* switch off filtering */ + /* flush stream */ + do { + c_stream.next_out = (Bytef*)outbuf; + c_stream.avail_out = OUTSIZE; + + err = deflate(&c_stream, Z_FINISH); + if (err != Z_OK && err != Z_STREAM_END) { + fprintf(stderr, "deflate: %s (%d)\n", c_stream.msg, err); + exit(2); + } + n += fwrite(outbuf, 1, OUTSIZE-c_stream.avail_out, f); + } while (err != Z_STREAM_END); + + fstate = 0; + } + if (!fstate) { + fwrite(s, 1, len, f); + return n+len; + } + + /* do the actual compression */ + c_stream.next_in = (Bytef*) s; + c_stream.avail_in = len; + + do { + c_stream.next_out = (Bytef*) outbuf; + c_stream.avail_out = OUTSIZE; + + err = deflate(&c_stream, Z_NO_FLUSH); + if (err != Z_OK) { + fprintf(stderr, "deflate: %s (%d)\n", c_stream.msg, err); + exit(2); + } + n += fwrite(outbuf, 1, OUTSIZE-c_stream.avail_out, f); + } while (!c_stream.avail_out); + + return n; +} + +/* ship len bytes from s using zlib compression. */ +int flate_xship(FILE *f, int filter, const char *s, int len) { + static int fstate = 0; + static z_stream c_stream; + char outbuf[OUTSIZE]; + int err; + int n=0; + + if (filter && !fstate) { + /* switch on filtering */ + if (filter == 1) { + n += fprintf(f, "currentfile /ASCII85Decode filter /FlateDecode filter cvx exec\n"); + } + c_stream.zalloc = Z_NULL; + c_stream.zfree = Z_NULL; + c_stream.opaque = Z_NULL; + err = deflateInit(&c_stream, 9); + if (err != Z_OK) { + fprintf(stderr, "deflateInit: %s (%d)\n", c_stream.msg, err); + exit(2); + } + c_stream.avail_in = 0; + n += a85init(f); + fstate = 1; + } else if (!filter && fstate) { + /* switch off filtering */ + /* flush stream */ + do { + c_stream.next_out = (Bytef*)outbuf; + c_stream.avail_out = OUTSIZE; + + err = deflate(&c_stream, Z_FINISH); + if (err != Z_OK && err != Z_STREAM_END) { + fprintf(stderr, "deflate: %s (%d)\n", c_stream.msg, err); + exit(2); + } + n += a85write(f, outbuf, OUTSIZE-c_stream.avail_out); + } while (err != Z_STREAM_END); + + n += a85finish(f); + + fstate = 0; + } + if (!fstate) { + fwrite(s, 1, len, f); + return n+len; + } + + /* do the actual compression */ + c_stream.next_in = (Bytef*) s; + c_stream.avail_in = len; + + do { + c_stream.next_out = (Bytef*) outbuf; + c_stream.avail_out = OUTSIZE; + + err = deflate(&c_stream, Z_NO_FLUSH); + if (err != Z_OK) { + fprintf(stderr, "deflate: %s (%d)\n", c_stream.msg, err); + exit(2); + } + n += a85write(f, outbuf, OUTSIZE-c_stream.avail_out); + } while (!c_stream.avail_out); + + return n; +} + +#else /* HAVE_ZLIB */ + +int pdf_xship(FILE *f, int filter, const char *s, int len) { + return dummy_xship(f, filter, s, len); +} + +int flate_xship(FILE *f, int filter, const char *s, int len) { + return dummy_xship(f, filter, s, len); +} + +#endif /* HAVE_ZLIB */ + +/* ---------------------------------------------------------------------- */ +/* lzw interface: LZW (=postscript level 2) compression with a85. + This relies on lzw.c/h to do the actual compression. */ + +/* use Postscript level 2 compression. Ship len bytes from str. */ +int lzw_xship(FILE *f, int filter, const char *str, int len) { + static int fstate = 0; + static lzw_stream_t *s = NULL; + char outbuf[OUTSIZE]; + int err; + int n=0; + + if (filter && !fstate) { + /* switch on filtering */ + if (filter == 1) { + n += fprintf(f, "currentfile /ASCII85Decode filter /LZWDecode filter cvx exec\n"); + } + s = lzw_init(); + if (s == NULL) { + fprintf(stderr, "lzw_init: %s\n", strerror(errno)); + exit(2); + } + n += a85init(f); + fstate = 1; + } else if (!filter && fstate) { + /* switch off filtering */ + /* flush stream */ + s->next_in = 0; + s->avail_in = 0; + do { + s->next_out = outbuf; + s->avail_out = OUTSIZE; + + err = lzw_compress(s, LZW_EOD); + if (err) { + fprintf(stderr, "lzw_compress: %s\n", strerror(errno)); + exit(2); + } + n += a85write(f, outbuf, OUTSIZE - s->avail_out); + } while (s->avail_out == 0); + + n += a85finish(f); + + lzw_free(s); + s = NULL; + + fstate = 0; + } + if (!fstate) { + fwrite(str, 1, len, f); + return n+len; + } + + /* do the actual compression */ + s->next_in = str; + s->avail_in = len; + + do { + s->next_out = outbuf; + s->avail_out = OUTSIZE; + + err = lzw_compress(s, LZW_NORMAL); + if (err) { + fprintf(stderr, "lzw_compress: %s\n", strerror(errno)); + exit(2); + } + n += a85write(f, outbuf, OUTSIZE - s->avail_out); + } while (s->avail_out == 0); + + return n; +} + +/* ---------------------------------------------------------------------- */ +/* a85 interface: a85 encoding without compression */ + +/* ship len bytes from s using a85 encoding only. */ +int a85_xship(FILE *f, int filter, const char *s, int len) { + static int fstate = 0; + int n=0; + + if (filter && !fstate) { + /* switch on filtering */ + if (filter == 1) { + n += fprintf(f, "currentfile /ASCII85Decode filter cvx exec\n"); + } + n += a85init(f); + fstate = 1; + } else if (!filter && fstate) { + /* switch off filtering */ + /* flush stream */ + n += a85finish(f); + fstate = 0; + } + if (!fstate) { + fwrite(s, 1, len, f); + return n+len; + } + + n += a85write(f, s, len); + + return n; +} + +/* ---------------------------------------------------------------------- */ +/* low-level a85 backend */ + +static unsigned long a85buf[4]; +static int a85n; +static int a85col; + +static int a85init(FILE *f) { + a85n = 0; + a85col = 0; + return 0; +} + +static int a85finish(FILE *f) { + int r=0; + + if (a85n) { + r+=a85out(f, a85n); + } + fputs("~>\n", f); + return r+2; +} + +static int a85write(FILE *f, const char *buf, int n) { + int i; + int r=0; + + for (i=0; i<n; i++) { + a85buf[a85n] = (unsigned char)buf[i]; + a85n++; + + if (a85n == 4) { + r+=a85out(f, 4); + a85n = 0; + } + } + return r; +} + +static int a85out(FILE *f, int n) { + char out[5]; + unsigned long s; + int r=0; + int i; + + for (i=n; i<4; i++) { + a85buf[i] = 0; + } + + s = (a85buf[0]<<24) + (a85buf[1]<<16) + (a85buf[2]<<8) + (a85buf[3]<<0); + + if (!s) { + r+=a85spool(f, 'z'); + } else { + for (i=4; i>=0; i--) { + out[i] = s % 85; + s /= 85; + } + for (i=0; i<n+1; i++) { + r+=a85spool(f, out[i]+33); + } + } + return r; +} + +static int a85spool(FILE *f, char c) { + fputc(c, f); + + a85col++; + if (a85col>70) { + fputc('\n', f); + a85col=0; + return 2; + } + + return 1; +} diff --git a/Build/source/libs/potrace/potrace-src/src/flate.h b/Build/source/libs/potrace/potrace-src/src/flate.h new file mode 100644 index 00000000000..47cea3a77f9 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/flate.h @@ -0,0 +1,15 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef FLATE_H +#define FLATE_H + +int dummy_xship(FILE *f, int filter, const char *s, int len); +int flate_xship(FILE *f, int filter, const char *s, int len); +int pdf_xship(FILE *f, int filter, const char *s, int len); +int lzw_xship(FILE *f, int filter, const char *s, int len); +int a85_xship(FILE *f, int filter, const char *s, int len); + +#endif /* FLATE_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/getopt.c b/Build/source/libs/potrace/potrace-src/src/getopt.c new file mode 100644 index 00000000000..d889c3c8686 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/getopt.c @@ -0,0 +1,1041 @@ +/* Getopt for GNU. + NOTE: getopt is now part of the C library, so if you don't know what + "Keep this file name-space clean" means, talk to drepper@gnu.org + before changing it! + + Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 + Free Software Foundation, Inc. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. */ + +/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. + Ditto for AIX 3.2 and <stdlib.h>. */ +#ifndef _NO_PROTO +# define _NO_PROTO +#endif + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#if !defined __STDC__ || !__STDC__ +/* This is a separate conditional since some stdc systems + reject `defined (const)'. */ +# ifndef const +# define const +# endif +#endif + +#include <stdio.h> + +/* This needs to come after some library #include + to get __GNU_LIBRARY__ defined. */ +#ifdef __GNU_LIBRARY__ +/* Don't include stdlib.h for non-GNU C libraries because some of them + contain conflicting prototypes for getopt. */ +# include <stdlib.h> +# include <unistd.h> +#endif /* GNU C library. */ + +#ifdef VMS +# include <unixlib.h> +# if HAVE_STRING_H - 0 +# include <string.h> +# endif +#endif + +#ifndef _ +/* This is for other GNU distributions with internationalized messages. */ +# if defined HAVE_LIBINTL_H || defined _LIBC +# include <libintl.h> +# ifndef _ +# define _(msgid) gettext (msgid) +# endif +# else +# define _(msgid) (msgid) +# endif +#endif + +/* This version of `getopt' appears to the caller like standard Unix `getopt' + but it behaves differently for the user, since it allows the user + to intersperse the options with the other arguments. + + As `getopt' works, it permutes the elements of ARGV so that, + when it is done, all the options precede everything else. Thus + all application programs are extended to handle flexible argument order. + + Setting the environment variable POSIXLY_CORRECT disables permutation. + Then the behavior is completely standard. + + GNU application programs can use a third alternative mode in which + they can distinguish the relative order of options and other arguments. */ + +#include "getopt.h" + +/* For communication from `getopt' to the caller. + When `getopt' finds an option that takes an argument, + the argument value is returned here. + Also, when `ordering' is RETURN_IN_ORDER, + each non-option ARGV-element is returned here. */ + +char *optarg; + +/* Index in ARGV of the next element to be scanned. + This is used for communication to and from the caller + and for communication between successive calls to `getopt'. + + On entry to `getopt', zero means this is the first call; initialize. + + When `getopt' returns -1, this is the index of the first of the + non-option elements that the caller should itself scan. + + Otherwise, `optind' communicates from one call to the next + how much of ARGV has been scanned so far. */ + +/* 1003.2 says this must be 1 before any call. */ +int optind = 1; + +/* Formerly, initialization of getopt depended on optind==0, which + causes problems with re-calling getopt as programs generally don't + know that. */ + +int __getopt_initialized; + +/* The next char to be scanned in the option-element + in which the last option character we returned was found. + This allows us to pick up the scan where we left off. + + If this is zero, or a null string, it means resume the scan + by advancing to the next ARGV-element. */ + +static char *nextchar; + +/* Callers store zero here to inhibit the error message + for unrecognized options. */ + +int opterr = 1; + +/* Set to an option character which was unrecognized. + This must be initialized on some systems to avoid linking in the + system's own getopt implementation. */ + +int optopt = '?'; + +/* Describe how to deal with options that follow non-option ARGV-elements. + + If the caller did not specify anything, + the default is REQUIRE_ORDER if the environment variable + POSIXLY_CORRECT is defined, PERMUTE otherwise. + + REQUIRE_ORDER means don't recognize them as options; + stop option processing when the first non-option is seen. + This is what Unix does. + This mode of operation is selected by either setting the environment + variable POSIXLY_CORRECT, or using `+' as the first character + of the list of option characters. + + PERMUTE is the default. We permute the contents of ARGV as we scan, + so that eventually all the non-options are at the end. This allows options + to be given in any order, even with programs that were not written to + expect this. + + RETURN_IN_ORDER is an option available to programs that were written + to expect options and other ARGV-elements in any order and that care about + the ordering of the two. We describe each non-option ARGV-element + as if it were the argument of an option with character code 1. + Using `-' as the first character of the list of option characters + selects this mode of operation. + + The special argument `--' forces an end of option-scanning regardless + of the value of `ordering'. In the case of RETURN_IN_ORDER, only + `--' can cause `getopt' to return -1 with `optind' != ARGC. */ + +static enum +{ + REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER +} ordering; + +/* Value of POSIXLY_CORRECT environment variable. */ +static char *posixly_correct; + +#ifdef __GNU_LIBRARY__ +/* We want to avoid inclusion of string.h with non-GNU libraries + because there are many ways it can cause trouble. + On some systems, it contains special magic macros that don't work + in GCC. */ +# include <string.h> +# define my_index strchr +#else + +# if HAVE_STRING_H +# include <string.h> +# else +# include <strings.h> +# endif + +/* Avoid depending on library functions or files + whose names are inconsistent. */ + +#ifndef getenv +extern char *getenv (); +#endif + +static char * +my_index (str, chr) + const char *str; + int chr; +{ + while (*str) + { + if (*str == chr) + return (char *) str; + str++; + } + return 0; +} + +/* If using GCC, we can safely declare strlen this way. + If not using GCC, it is ok not to declare it. */ +#ifdef __GNUC__ +/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. + That was relevant to code that was here before. */ +# if (!defined __STDC__ || !__STDC__) && !defined strlen +/* gcc with -traditional declares the built-in strlen to return int, + and has done so at least since version 2.4.5. -- rms. */ +extern int strlen (const char *); +# endif /* not __STDC__ */ +#endif /* __GNUC__ */ + +#endif /* not __GNU_LIBRARY__ */ + +/* Handle permutation of arguments. */ + +/* Describe the part of ARGV that contains non-options that have + been skipped. `first_nonopt' is the index in ARGV of the first of them; + `last_nonopt' is the index after the last of them. */ + +static int first_nonopt; +static int last_nonopt; + +#ifdef _LIBC +/* Bash 2.0 gives us an environment variable containing flags + indicating ARGV elements that should not be considered arguments. */ + +/* Defined in getopt_init.c */ +extern char *__getopt_nonoption_flags; + +static int nonoption_flags_max_len; +static int nonoption_flags_len; + +static int original_argc; +static char *const *original_argv; + +/* Make sure the environment variable bash 2.0 puts in the environment + is valid for the getopt call we must make sure that the ARGV passed + to getopt is that one passed to the process. */ +static void +__attribute__ ((unused)) +store_args_and_env (int argc, char *const *argv) +{ + /* XXX This is no good solution. We should rather copy the args so + that we can compare them later. But we must not use malloc(3). */ + original_argc = argc; + original_argv = argv; +} +# ifdef text_set_element +text_set_element (__libc_subinit, store_args_and_env); +# endif /* text_set_element */ + +# define SWAP_FLAGS(ch1, ch2) \ + if (nonoption_flags_len > 0) \ + { \ + char __tmp = __getopt_nonoption_flags[ch1]; \ + __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ + __getopt_nonoption_flags[ch2] = __tmp; \ + } +#else /* !_LIBC */ +# define SWAP_FLAGS(ch1, ch2) +#endif /* _LIBC */ + +/* Exchange two adjacent subsequences of ARGV. + One subsequence is elements [first_nonopt,last_nonopt) + which contains all the non-options that have been skipped so far. + The other is elements [last_nonopt,optind), which contains all + the options processed since those non-options were skipped. + + `first_nonopt' and `last_nonopt' are relocated so that they describe + the new indices of the non-options in ARGV after they are moved. */ + +#if defined __STDC__ && __STDC__ +static void exchange (char **); +#endif + +static void +exchange (argv) + char **argv; +{ + int bottom = first_nonopt; + int middle = last_nonopt; + int top = optind; + char *tem; + + /* Exchange the shorter segment with the far end of the longer segment. + That puts the shorter segment into the right place. + It leaves the longer segment in the right place overall, + but it consists of two parts that need to be swapped next. */ + +#ifdef _LIBC + /* First make sure the handling of the `__getopt_nonoption_flags' + string can work normally. Our top argument must be in the range + of the string. */ + if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) + { + /* We must extend the array. The user plays games with us and + presents new arguments. */ + char *new_str = malloc (top + 1); + if (new_str == NULL) + nonoption_flags_len = nonoption_flags_max_len = 0; + else + { + memset (__mempcpy (new_str, __getopt_nonoption_flags, + nonoption_flags_max_len), + '\0', top + 1 - nonoption_flags_max_len); + nonoption_flags_max_len = top + 1; + __getopt_nonoption_flags = new_str; + } + } +#endif + + while (top > middle && middle > bottom) + { + if (top - middle > middle - bottom) + { + /* Bottom segment is the short one. */ + int len = middle - bottom; + register int i; + + /* Swap it with the top part of the top segment. */ + for (i = 0; i < len; i++) + { + tem = argv[bottom + i]; + argv[bottom + i] = argv[top - (middle - bottom) + i]; + argv[top - (middle - bottom) + i] = tem; + SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); + } + /* Exclude the moved bottom segment from further swapping. */ + top -= len; + } + else + { + /* Top segment is the short one. */ + int len = top - middle; + register int i; + + /* Swap it with the bottom part of the bottom segment. */ + for (i = 0; i < len; i++) + { + tem = argv[bottom + i]; + argv[bottom + i] = argv[middle + i]; + argv[middle + i] = tem; + SWAP_FLAGS (bottom + i, middle + i); + } + /* Exclude the moved top segment from further swapping. */ + bottom += len; + } + } + + /* Update records for the slots the non-options now occupy. */ + + first_nonopt += (optind - last_nonopt); + last_nonopt = optind; +} + +/* Initialize the internal data when the first call is made. */ + +#if defined __STDC__ && __STDC__ +static const char *_getopt_initialize (int, char *const *, const char *); +#endif +static const char * +_getopt_initialize (argc, argv, optstring) + int argc; + char *const *argv; + const char *optstring; +{ + /* Start processing options with ARGV-element 1 (since ARGV-element 0 + is the program name); the sequence of previously skipped + non-option ARGV-elements is empty. */ + + first_nonopt = last_nonopt = optind; + + nextchar = NULL; + + posixly_correct = getenv ("POSIXLY_CORRECT"); + + /* Determine how to handle the ordering of options and nonoptions. */ + + if (optstring[0] == '-') + { + ordering = RETURN_IN_ORDER; + ++optstring; + } + else if (optstring[0] == '+') + { + ordering = REQUIRE_ORDER; + ++optstring; + } + else if (posixly_correct != NULL) + ordering = REQUIRE_ORDER; + else + ordering = PERMUTE; + +#ifdef _LIBC + if (posixly_correct == NULL + && argc == original_argc && argv == original_argv) + { + if (nonoption_flags_max_len == 0) + { + if (__getopt_nonoption_flags == NULL + || __getopt_nonoption_flags[0] == '\0') + nonoption_flags_max_len = -1; + else + { + const char *orig_str = __getopt_nonoption_flags; + int len = nonoption_flags_max_len = strlen (orig_str); + if (nonoption_flags_max_len < argc) + nonoption_flags_max_len = argc; + __getopt_nonoption_flags = + (char *) malloc (nonoption_flags_max_len); + if (__getopt_nonoption_flags == NULL) + nonoption_flags_max_len = -1; + else + memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), + '\0', nonoption_flags_max_len - len); + } + } + nonoption_flags_len = nonoption_flags_max_len; + } + else + nonoption_flags_len = 0; +#endif + + return optstring; +} + +/* Scan elements of ARGV (whose length is ARGC) for option characters + given in OPTSTRING. + + If an element of ARGV starts with '-', and is not exactly "-" or "--", + then it is an option element. The characters of this element + (aside from the initial '-') are option characters. If `getopt' + is called repeatedly, it returns successively each of the option characters + from each of the option elements. + + If `getopt' finds another option character, it returns that character, + updating `optind' and `nextchar' so that the next call to `getopt' can + resume the scan with the following option character or ARGV-element. + + If there are no more option characters, `getopt' returns -1. + Then `optind' is the index in ARGV of the first ARGV-element + that is not an option. (The ARGV-elements have been permuted + so that those that are not options now come last.) + + OPTSTRING is a string containing the legitimate option characters. + If an option character is seen that is not listed in OPTSTRING, + return '?' after printing an error message. If you set `opterr' to + zero, the error message is suppressed but we still return '?'. + + If a char in OPTSTRING is followed by a colon, that means it wants an arg, + so the following text in the same ARGV-element, or the text of the following + ARGV-element, is returned in `optarg'. Two colons mean an option that + wants an optional arg; if there is text in the current ARGV-element, + it is returned in `optarg', otherwise `optarg' is set to zero. + + If OPTSTRING starts with `-' or `+', it requests different methods of + handling the non-option ARGV-elements. + See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. + + Long-named options begin with `--' instead of `-'. + Their names may be abbreviated as long as the abbreviation is unique + or is an exact match for some defined option. If they have an + argument, it follows the option name in the same ARGV-element, separated + from the option name by a `=', or else the in next ARGV-element. + When `getopt' finds a long-named option, it returns 0 if that option's + `flag' field is nonzero, the value of the option's `val' field + if the `flag' field is zero. + + The elements of ARGV aren't really const, because we permute them. + But we pretend they're const in the prototype to be compatible + with other systems. + + LONGOPTS is a vector of `struct option' terminated by an + element containing a name which is zero. + + LONGIND returns the index in LONGOPT of the long-named option found. + It is only valid when a long-named option has been found by the most + recent call. + + If LONG_ONLY is nonzero, '-' as well as '--' can introduce + long-named options. */ + +int +_getopt_internal (argc, argv, optstring, longopts, longind, long_only) + int argc; + char *const *argv; + const char *optstring; + const struct option *longopts; + int *longind; + int long_only; +{ + int print_errors = opterr; + if (optstring[0] == ':') + print_errors = 0; + + if (argc < 1) + return -1; + + optarg = NULL; + + if (optind == 0 || !__getopt_initialized) + { + if (optind == 0) + optind = 1; /* Don't scan ARGV[0], the program name. */ + optstring = _getopt_initialize (argc, argv, optstring); + __getopt_initialized = 1; + } + + /* Test whether ARGV[optind] points to a non-option argument. + Either it does not have option syntax, or there is an environment flag + from the shell indicating it is not an option. The later information + is only used when the used in the GNU libc. */ +#ifdef _LIBC +# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ + || (optind < nonoption_flags_len \ + && __getopt_nonoption_flags[optind] == '1')) +#else +# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') +#endif + + if (nextchar == NULL || *nextchar == '\0') + { + /* Advance to the next ARGV-element. */ + + /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been + moved back by the user (who may also have changed the arguments). */ + if (last_nonopt > optind) + last_nonopt = optind; + if (first_nonopt > optind) + first_nonopt = optind; + + if (ordering == PERMUTE) + { + /* If we have just processed some options following some non-options, + exchange them so that the options come first. */ + + if (first_nonopt != last_nonopt && last_nonopt != optind) + exchange ((char **) argv); + else if (last_nonopt != optind) + first_nonopt = optind; + + /* Skip any additional non-options + and extend the range of non-options previously skipped. */ + + while (optind < argc && NONOPTION_P) + optind++; + last_nonopt = optind; + } + + /* The special ARGV-element `--' means premature end of options. + Skip it like a null option, + then exchange with previous non-options as if it were an option, + then skip everything else like a non-option. */ + + if (optind != argc && !strcmp (argv[optind], "--")) + { + optind++; + + if (first_nonopt != last_nonopt && last_nonopt != optind) + exchange ((char **) argv); + else if (first_nonopt == last_nonopt) + first_nonopt = optind; + last_nonopt = argc; + + optind = argc; + } + + /* If we have done all the ARGV-elements, stop the scan + and back over any non-options that we skipped and permuted. */ + + if (optind == argc) + { + /* Set the next-arg-index to point at the non-options + that we previously skipped, so the caller will digest them. */ + if (first_nonopt != last_nonopt) + optind = first_nonopt; + return -1; + } + + /* If we have come to a non-option and did not permute it, + either stop the scan or describe it to the caller and pass it by. */ + + if (NONOPTION_P) + { + if (ordering == REQUIRE_ORDER) + return -1; + optarg = argv[optind++]; + return 1; + } + + /* We have found another option-ARGV-element. + Skip the initial punctuation. */ + + nextchar = (argv[optind] + 1 + + (longopts != NULL && argv[optind][1] == '-')); + } + + /* Decode the current option-ARGV-element. */ + + /* Check whether the ARGV-element is a long option. + + If long_only and the ARGV-element has the form "-f", where f is + a valid short option, don't consider it an abbreviated form of + a long option that starts with f. Otherwise there would be no + way to give the -f short option. + + On the other hand, if there's a long option "fubar" and + the ARGV-element is "-fu", do consider that an abbreviation of + the long option, just like "--fu", and not "-f" with arg "u". + + This distinction seems to be the most useful approach. */ + + if (longopts != NULL + && (argv[optind][1] == '-' + || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) + { + char *nameend; + const struct option *p; + const struct option *pfound = NULL; + int exact = 0; + int ambig = 0; + int indfound = -1; + int option_index; + + for (nameend = nextchar; *nameend && *nameend != '='; nameend++) + /* Do nothing. */ ; + + /* Test all long options for either exact match + or abbreviated matches. */ + for (p = longopts, option_index = 0; p->name; p++, option_index++) + if (!strncmp (p->name, nextchar, nameend - nextchar)) + { + if ((unsigned int) (nameend - nextchar) + == (unsigned int) strlen (p->name)) + { + /* Exact match found. */ + pfound = p; + indfound = option_index; + exact = 1; + break; + } + else if (pfound == NULL) + { + /* First nonexact match found. */ + pfound = p; + indfound = option_index; + } + else if (long_only + || pfound->has_arg != p->has_arg + || pfound->flag != p->flag + || pfound->val != p->val) + /* Second or later nonexact match found. */ + ambig = 1; + } + + if (ambig && !exact) + { + if (print_errors) + fprintf (stderr, _("%s: option `%s' is ambiguous\n"), + argv[0], argv[optind]); + nextchar += strlen (nextchar); + optind++; + optopt = 0; + return '?'; + } + + if (pfound != NULL) + { + option_index = indfound; + optind++; + if (*nameend) + { + /* Don't test has_arg with >, because some C compilers don't + allow it to be used on enums. */ + if (pfound->has_arg) + optarg = nameend + 1; + else + { + if (print_errors) + { + if (argv[optind - 1][1] == '-') + /* --option */ + fprintf (stderr, + _("%s: option `--%s' doesn't allow an argument\n"), + argv[0], pfound->name); + else + /* +option or -option */ + fprintf (stderr, + _("%s: option `%c%s' doesn't allow an argument\n"), + argv[0], argv[optind - 1][0], pfound->name); + } + + nextchar += strlen (nextchar); + + optopt = pfound->val; + return '?'; + } + } + else if (pfound->has_arg == 1) + { + if (optind < argc) + optarg = argv[optind++]; + else + { + if (print_errors) + fprintf (stderr, + _("%s: option `%s' requires an argument\n"), + argv[0], argv[optind - 1]); + nextchar += strlen (nextchar); + optopt = pfound->val; + return optstring[0] == ':' ? ':' : '?'; + } + } + nextchar += strlen (nextchar); + if (longind != NULL) + *longind = option_index; + if (pfound->flag) + { + *(pfound->flag) = pfound->val; + return 0; + } + return pfound->val; + } + + /* Can't find it as a long option. If this is not getopt_long_only, + or the option starts with '--' or is not a valid short + option, then it's an error. + Otherwise interpret it as a short option. */ + if (!long_only || argv[optind][1] == '-' + || my_index (optstring, *nextchar) == NULL) + { + if (print_errors) + { + if (argv[optind][1] == '-') + /* --option */ + fprintf (stderr, _("%s: unrecognized option `--%s'\n"), + argv[0], nextchar); + else + /* +option or -option */ + fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), + argv[0], argv[optind][0], nextchar); + } + nextchar = (char *) ""; + optind++; + optopt = 0; + return '?'; + } + } + + /* Look at and handle the next short option-character. */ + + { + char c = *nextchar++; + char *temp = my_index (optstring, c); + + /* Increment `optind' when we start to process its last character. */ + if (*nextchar == '\0') + ++optind; + + if (temp == NULL || c == ':') + { + if (print_errors) + { + if (posixly_correct) + /* 1003.2 specifies the format of this message. */ + fprintf (stderr, _("%s: illegal option -- %c\n"), + argv[0], c); + else + fprintf (stderr, _("%s: invalid option -- %c\n"), + argv[0], c); + } + optopt = c; + return '?'; + } + /* Convenience. Treat POSIX -W foo same as long option --foo */ + if (temp[0] == 'W' && temp[1] == ';') + { + char *nameend; + const struct option *p; + const struct option *pfound = NULL; + int exact = 0; + int ambig = 0; + int indfound = 0; + int option_index; + + /* This is an option that requires an argument. */ + if (*nextchar != '\0') + { + optarg = nextchar; + /* If we end this ARGV-element by taking the rest as an arg, + we must advance to the next element now. */ + optind++; + } + else if (optind == argc) + { + if (print_errors) + { + /* 1003.2 specifies the format of this message. */ + fprintf (stderr, _("%s: option requires an argument -- %c\n"), + argv[0], c); + } + optopt = c; + if (optstring[0] == ':') + c = ':'; + else + c = '?'; + return c; + } + else + /* We already incremented `optind' once; + increment it again when taking next ARGV-elt as argument. */ + optarg = argv[optind++]; + + /* optarg is now the argument, see if it's in the + table of longopts. */ + + for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) + /* Do nothing. */ ; + + /* Test all long options for either exact match + or abbreviated matches. */ + for (p = longopts, option_index = 0; p->name; p++, option_index++) + if (!strncmp (p->name, nextchar, nameend - nextchar)) + { + if ((unsigned int) (nameend - nextchar) == strlen (p->name)) + { + /* Exact match found. */ + pfound = p; + indfound = option_index; + exact = 1; + break; + } + else if (pfound == NULL) + { + /* First nonexact match found. */ + pfound = p; + indfound = option_index; + } + else + /* Second or later nonexact match found. */ + ambig = 1; + } + if (ambig && !exact) + { + if (print_errors) + fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), + argv[0], argv[optind]); + nextchar += strlen (nextchar); + optind++; + return '?'; + } + if (pfound != NULL) + { + option_index = indfound; + if (*nameend) + { + /* Don't test has_arg with >, because some C compilers don't + allow it to be used on enums. */ + if (pfound->has_arg) + optarg = nameend + 1; + else + { + if (print_errors) + fprintf (stderr, _("%s: option `-W %s' doesn't allow an argument\n"), + argv[0], pfound->name); + + nextchar += strlen (nextchar); + return '?'; + } + } + else if (pfound->has_arg == 1) + { + if (optind < argc) + optarg = argv[optind++]; + else + { + if (print_errors) + fprintf (stderr, + _("%s: option `%s' requires an argument\n"), + argv[0], argv[optind - 1]); + nextchar += strlen (nextchar); + return optstring[0] == ':' ? ':' : '?'; + } + } + nextchar += strlen (nextchar); + if (longind != NULL) + *longind = option_index; + if (pfound->flag) + { + *(pfound->flag) = pfound->val; + return 0; + } + return pfound->val; + } + nextchar = NULL; + return 'W'; /* Let the application handle it. */ + } + if (temp[1] == ':') + { + if (temp[2] == ':') + { + /* This is an option that accepts an argument optionally. */ + if (*nextchar != '\0') + { + optarg = nextchar; + optind++; + } + else + optarg = NULL; + nextchar = NULL; + } + else + { + /* This is an option that requires an argument. */ + if (*nextchar != '\0') + { + optarg = nextchar; + /* If we end this ARGV-element by taking the rest as an arg, + we must advance to the next element now. */ + optind++; + } + else if (optind == argc) + { + if (print_errors) + { + /* 1003.2 specifies the format of this message. */ + fprintf (stderr, + _("%s: option requires an argument -- %c\n"), + argv[0], c); + } + optopt = c; + if (optstring[0] == ':') + c = ':'; + else + c = '?'; + } + else + /* We already incremented `optind' once; + increment it again when taking next ARGV-elt as argument. */ + optarg = argv[optind++]; + nextchar = NULL; + } + } + return c; + } +} + +int +getopt (argc, argv, optstring) + int argc; + char *const *argv; + const char *optstring; +{ + return _getopt_internal (argc, argv, optstring, + (const struct option *) 0, + (int *) 0, + 0); +} + + +#ifdef TEST + +/* Compile with -DTEST to make an executable for use in testing + the above definition of `getopt'. */ + +int +main (argc, argv) + int argc; + char **argv; +{ + int c; + int digit_optind = 0; + + while (1) + { + int this_option_optind = optind ? optind : 1; + + c = getopt (argc, argv, "abc:d:0123456789"); + if (c == -1) + break; + + switch (c) + { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + if (digit_optind != 0 && digit_optind != this_option_optind) + printf ("digits occur in two different argv-elements.\n"); + digit_optind = this_option_optind; + printf ("option %c\n", c); + break; + + case 'a': + printf ("option a\n"); + break; + + case 'b': + printf ("option b\n"); + break; + + case 'c': + printf ("option c with value `%s'\n", optarg); + break; + + case '?': + break; + + default: + printf ("?? getopt returned character code 0%o ??\n", c); + } + } + + if (optind < argc) + { + printf ("non-option ARGV-elements: "); + while (optind < argc) + printf ("%s ", argv[optind++]); + printf ("\n"); + } + + exit (0); +} + +#endif /* TEST */ diff --git a/Build/source/libs/potrace/potrace-src/src/getopt1.c b/Build/source/libs/potrace/potrace-src/src/getopt1.c new file mode 100644 index 00000000000..d983d120ac0 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/getopt1.c @@ -0,0 +1,168 @@ +/* getopt_long and getopt_long_only entry points for GNU getopt. + Copyright (C) 1987,88,89,90,91,92,93,94,96,97,98 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "getopt.h" + +#if !defined __STDC__ || !__STDC__ +/* This is a separate conditional since some stdc systems + reject `defined (const)'. */ +#ifndef const +#define const +#endif +#endif + +#include <stdio.h> + +/* This needs to come after some library #include + to get __GNU_LIBRARY__ defined. */ +#ifdef __GNU_LIBRARY__ +#include <stdlib.h> +#endif + +#ifndef NULL +#define NULL 0 +#endif + +int +getopt_long (argc, argv, options, long_options, opt_index) + int argc; + char *const *argv; + const char *options; + const struct option *long_options; + int *opt_index; +{ + return _getopt_internal (argc, argv, options, long_options, opt_index, 0); +} + +/* Like getopt_long, but '-' as well as '--' can indicate a long option. + If an option that starts with '-' (not '--') doesn't match a long option, + but does match a short option, it is parsed as a short option + instead. */ + +int +getopt_long_only (argc, argv, options, long_options, opt_index) + int argc; + char *const *argv; + const char *options; + const struct option *long_options; + int *opt_index; +{ + return _getopt_internal (argc, argv, options, long_options, opt_index, 1); +} + + + +#ifdef TEST + +#include <stdio.h> + +int +main (argc, argv) + int argc; + char **argv; +{ + int c; + int digit_optind = 0; + + while (1) + { + int this_option_optind = optind ? optind : 1; + int option_index = 0; + static struct option long_options[] = + { + {"add", 1, 0, 0}, + {"append", 0, 0, 0}, + {"delete", 1, 0, 0}, + {"verbose", 0, 0, 0}, + {"create", 0, 0, 0}, + {"file", 1, 0, 0}, + {0, 0, 0, 0} + }; + + c = getopt_long (argc, argv, "abc:d:0123456789", + long_options, &option_index); + if (c == -1) + break; + + switch (c) + { + case 0: + printf ("option %s", long_options[option_index].name); + if (optarg) + printf (" with arg %s", optarg); + printf ("\n"); + break; + + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + if (digit_optind != 0 && digit_optind != this_option_optind) + printf ("digits occur in two different argv-elements.\n"); + digit_optind = this_option_optind; + printf ("option %c\n", c); + break; + + case 'a': + printf ("option a\n"); + break; + + case 'b': + printf ("option b\n"); + break; + + case 'c': + printf ("option c with value `%s'\n", optarg); + break; + + case 'd': + printf ("option d with value `%s'\n", optarg); + break; + + case '?': + break; + + default: + printf ("?? getopt returned character code 0%o ??\n", c); + } + } + + if (optind < argc) + { + printf ("non-option ARGV-elements: "); + while (optind < argc) + printf ("%s ", argv[optind++]); + printf ("\n"); + } + + exit (0); +} + +#endif /* TEST */ diff --git a/Build/source/libs/potrace/potrace-src/src/greymap.c b/Build/source/libs/potrace/potrace-src/src/greymap.c new file mode 100644 index 00000000000..756f207486b --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/greymap.c @@ -0,0 +1,1090 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* Routines for manipulating greymaps, including reading pgm files. We + only deal with greymaps of depth 8 bits. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdlib.h> +#include <string.h> +#include <math.h> +#include <errno.h> +#include <stddef.h> +#ifdef HAVE_INTTYPES_H +#include <inttypes.h> +#endif + +#include "greymap.h" +#include "bitops.h" + +#define INTBITS (8*sizeof(int)) + +#define mod(a,n) ((a)>=(n) ? (a)%(n) : (a)>=0 ? (a) : (n)-1-(-1-(a))%(n)) + +static int gm_readbody_pnm(FILE *f, greymap_t **gmp, int magic); +static int gm_readbody_bmp(FILE *f, greymap_t **gmp); + +#define TRY(x) if (x) goto try_error +#define TRY_EOF(x) if (x) goto eof +#define TRY_STD(x) if (x) goto std_error + +/* ---------------------------------------------------------------------- */ +/* basic greymap routines */ + +/* calculate the size, in bytes, required for the data area of a + greymap of the given dy and h. Assume h >= 0. Return -1 if the size + does not fit into the ptrdiff_t type. */ +static inline ptrdiff_t getsize(int dy, int h) { + ptrdiff_t size; + + if (dy < 0) { + dy = -dy; + } + + size = (ptrdiff_t)dy * (ptrdiff_t)h * (ptrdiff_t)GM_SAMPLESIZE; + + /* check for overflow error */ + if (size < 0 || (h != 0 && dy != 0 && size / h / dy != GM_SAMPLESIZE)) { + return -1; + } + + return size; +} + +/* return the size, in bytes, of the data area of the greymap. Return + -1 if the size does not fit into the ptrdiff_t type; however, this + cannot happen if the bitmap is well-formed, i.e., if created with + gm_new or gm_dup. */ +static inline ptrdiff_t gm_size(const greymap_t *gm) { + return getsize(gm->dy, gm->h); +} + + + +/* return new greymap initialized to 0. NULL with errno on error. + Assumes w, h >= 0. */ +greymap_t *gm_new(int w, int h) { + greymap_t *gm; + int dy = w; + ptrdiff_t size; + + size = getsize(dy, h); + if (size < 0) { + errno = ENOMEM; + return NULL; + } + if (size == 0) { + size = GM_SAMPLESIZE; /* make sure calloc() doesn't return NULL */ + } + + gm = (greymap_t *) malloc(sizeof(greymap_t)); + if (!gm) { + return NULL; + } + gm->w = w; + gm->h = h; + gm->dy = dy; + gm->base = (gm_sample_t *) calloc(1, size); + if (!gm->base) { + free(gm); + return NULL; + } + gm->map = gm->base; + return gm; +} + +/* free the given greymap */ +void gm_free(greymap_t *gm) { + if (gm) { + free(gm->base); + } + free(gm); +} + +/* duplicate the given greymap. Return NULL on error with errno set. */ +greymap_t *gm_dup(greymap_t *gm) { + greymap_t *gm1 = gm_new(gm->w, gm->h); + int y; + + if (!gm1) { + return NULL; + } + for (y=0; y<gm->h; y++) { + memcpy(gm_scanline(gm1, y), gm_scanline(gm, y), (size_t)gm1->dy * GM_SAMPLESIZE); + } + return gm1; +} + +/* clear the given greymap to color b. */ +void gm_clear(greymap_t *gm, int b) { + ptrdiff_t size = gm_size(gm); + int x, y; + + if (b==0) { + memset(gm->base, 0, size); + } else { + for (y=0; y<gm->h; y++) { + for (x=0; x<gm->w; x++) { + GM_UPUT(gm, x, y, b); + } + } + } +} + +/* turn the given greymap upside down. This does not move the pixel + data or change the base address. */ +static inline void gm_flip(greymap_t *gm) { + int dy = gm->dy; + + if (gm->h == 0 || gm->h == 1) { + return; + } + + gm->map = gm_scanline(gm, gm->h - 1); + gm->dy = -dy; +} + +/* resize the greymap to the given new height. The pixel data remains + bottom-aligned (truncated at the top) when dy >= 0 and top-aligned + (truncated at the bottom) when dy < 0. Return 0 on success, or 1 on + error with errno set. If the new height is <= the old one, no error + should occur. If the new height is larger, the additional pixel + data is *not* initialized. */ +static inline int gm_resize(greymap_t *gm, int h) { + int dy = gm->dy; + ptrdiff_t newsize; + gm_sample_t *newbase; + + if (dy < 0) { + gm_flip(gm); + } + + newsize = getsize(dy, h); + if (newsize < 0) { + errno = ENOMEM; + goto error; + } + if (newsize == 0) { + newsize = GM_SAMPLESIZE; /* make sure realloc() doesn't return NULL */ + } + + newbase = (gm_sample_t *)realloc(gm->base, newsize); + if (newbase == NULL) { + goto error; + } + gm->base = newbase; + gm->map = newbase; + gm->h = h; + + if (dy < 0) { + gm_flip(gm); + } + return 0; + + error: + if (dy < 0) { + gm_flip(gm); + } + return 1; +} + + +/* ---------------------------------------------------------------------- */ +/* routines for reading pnm streams */ + +/* read next character after whitespace and comments. Return EOF on + end of file or error. */ +static int fgetc_ws(FILE *f) { + int c; + + while (1) { + c = fgetc(f); + if (c=='#') { + while (1) { + c = fgetc(f); + if (c=='\n' || c==EOF) { + break; + } + } + } + /* space, tab, line feed, carriage return, form-feed */ + if (c!=' ' && c!='\t' && c!='\r' && c!='\n' && c!=12) { + return c; + } + } +} + +/* skip whitespace and comments, then read a non-negative decimal + number from a stream. Return -1 on EOF. Tolerate other errors (skip + bad characters). Do not the read any characters following the + number (put next character back into the stream) */ + +static int readnum(FILE *f) { + int c; + uint64_t acc; + + /* skip whitespace and comments */ + while (1) { + c = fgetc_ws(f); + if (c==EOF) { + return -1; + } + if (c>='0' && c<='9') { + break; + } + } + + /* first digit is already in c */ + acc = c-'0'; + while (1) { + c = fgetc(f); + if (c==EOF) { + break; + } + if (c<'0' || c>'9') { + ungetc(c, f); + break; + } + acc *= 10; + acc += c-'0'; + if (acc > 0x7fffffff) { + return -1; + } + } + return acc; +} + +/* similar to readnum, but read only a single 0 or 1, and do not read + any characters after it. */ + +static int readbit(FILE *f) { + int c; + + /* skip whitespace and comments */ + while (1) { + c = fgetc_ws(f); + if (c==EOF) { + return -1; + } + if (c>='0' && c<='1') { + break; + } + } + + return c-'0'; +} + +/* ---------------------------------------------------------------------- */ + +/* read a PNM stream: P1-P6 format (see pnm(5)), or a BMP stream, and + convert the output to a greymap. Return greymap in *gmp. Return 0 + on success, -1 on error with errno set, -2 on bad file format (with + error message in gm_read_error), and 1 on premature end of file, -3 + on empty file (including files with only whitespace and comments), + -4 if wrong magic number. If the return value is >=0, *gmp is + valid. */ + +const char *gm_read_error = NULL; + +int gm_read(FILE *f, greymap_t **gmp) { + int magic[2]; + + /* read magic number. We ignore whitespace and comments before the + magic, for the benefit of concatenated files in P1-P3 format. + Multiple P1-P3 images in a single file are not formally allowed + by the PNM standard, but there is no harm in being lenient. */ + + magic[0] = fgetc_ws(f); + if (magic[0] == EOF) { + /* files which contain only comments and whitespace count as "empty" */ + return -3; + } + magic[1] = fgetc(f); + if (magic[0] == 'P' && magic[1] >= '1' && magic[1] <= '6') { + return gm_readbody_pnm(f, gmp, magic[1]); + } + if (magic[0] == 'B' && magic[1] == 'M') { + return gm_readbody_bmp(f, gmp); + } + return -4; +} + +/* ---------------------------------------------------------------------- */ +/* read PNM format */ + +/* read PNM stream after magic number. Return values as for gm_read */ +static int gm_readbody_pnm(FILE *f, greymap_t **gmp, int magic) { + greymap_t *gm; + int x, y, i, j, b, b1, sum; + int bpr; /* bytes per row (as opposed to 4*gm->c) */ + int w, h, max; + int realheight; /* in case of incomplete file, keeps track of how + many scan lines actually contain data */ + + gm = NULL; + + w = readnum(f); + if (w<0) { + goto format_error; + } + + h = readnum(f); + if (h<0) { + goto format_error; + } + + /* allocate greymap */ + gm = gm_new(w, h); + if (!gm) { + goto std_error; + } + + realheight = 0; + + switch (magic) { + default: + /* not reached */ + goto format_error; + + case '1': + /* read P1 format: PBM ascii */ + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + b = readbit(f); + if (b<0) { + goto eof; + } + GM_UPUT(gm, x, y, b ? 0 : 255); + } + } + break; + + case '2': + /* read P2 format: PGM ascii */ + + max = readnum(f); + if (max<1) { + goto format_error; + } + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + b = readnum(f); + if (b<0) { + goto eof; + } + GM_UPUT(gm, x, y, b*255/max); + } + } + break; + + case '3': + /* read P3 format: PPM ascii */ + + max = readnum(f); + if (max<1) { + goto format_error; + } + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + sum = 0; + for (i=0; i<3; i++) { + b = readnum(f); + if (b<0) { + goto eof; + } + sum += b; + } + GM_UPUT(gm, x, y, sum*(255/3)/max); + } + } + break; + + case '4': + /* read P4 format: PBM raw */ + + b = fgetc(f); /* read single white-space character after height */ + if (b==EOF) { + goto format_error; + } + + bpr = (w+7)/8; + + for (y=0; y<h; y++) { + realheight = y+1; + for (i=0; i<bpr; i++) { + b = fgetc(f); + if (b==EOF) { + goto eof; + } + for (j=0; j<8; j++) { + GM_PUT(gm, i*8+j, y, b & (0x80 >> j) ? 0 : 255); + } + } + } + break; + + case '5': + /* read P5 format: PGM raw */ + + max = readnum(f); + if (max<1) { + goto format_error; + } + + b = fgetc(f); /* read single white-space character after max */ + if (b==EOF) { + goto format_error; + } + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + b = fgetc(f); + if (b==EOF) + goto eof; + if (max>=256) { + b <<= 8; + b1 = fgetc(f); + if (b1==EOF) + goto eof; + b |= b1; + } + GM_UPUT(gm, x, y, b*255/max); + } + } + break; + + case '6': + /* read P6 format: PPM raw */ + + max = readnum(f); + if (max<1) { + goto format_error; + } + + b = fgetc(f); /* read single white-space character after max */ + if (b==EOF) { + goto format_error; + } + + for (y=0; y<h; y++) { + realheight = y+1; + for (x=0; x<w; x++) { + sum = 0; + for (i=0; i<3; i++) { + b = fgetc(f); + if (b==EOF) { + goto eof; + } + if (max>=256) { + b <<= 8; + b1 = fgetc(f); + if (b1==EOF) + goto eof; + b |= b1; + } + sum += b; + } + GM_UPUT(gm, x, y, sum*(255/3)/max); + } + } + break; + } + + gm_flip(gm); + *gmp = gm; + return 0; + + eof: + TRY_STD(gm_resize(gm, realheight)); + gm_flip(gm); + *gmp = gm; + return 1; + + format_error: + gm_free(gm); + if (magic == '1' || magic == '4') { + gm_read_error = "invalid pbm file"; + } else if (magic == '2' || magic == '5') { + gm_read_error = "invalid pgm file"; + } else { + gm_read_error = "invalid ppm file"; + } + return -2; + + std_error: + gm_free(gm); + return -1; +} + +/* ---------------------------------------------------------------------- */ +/* read BMP format */ + +struct bmp_info_s { + unsigned int FileSize; + unsigned int reserved; + unsigned int DataOffset; + unsigned int InfoSize; + unsigned int w; /* width */ + unsigned int h; /* height */ + unsigned int Planes; + unsigned int bits; /* bits per sample */ + unsigned int comp; /* compression mode */ + unsigned int ImageSize; + unsigned int XpixelsPerM; + unsigned int YpixelsPerM; + unsigned int ncolors; /* number of colors in palette */ + unsigned int ColorsImportant; + unsigned int RedMask; + unsigned int GreenMask; + unsigned int BlueMask; + unsigned int AlphaMask; + unsigned int ctbits; /* sample size for color table */ + int topdown; /* top-down mode? */ +}; +typedef struct bmp_info_s bmp_info_t; + +/* auxiliary */ + +static int bmp_count = 0; /* counter for byte padding */ +static int bmp_pos = 0; /* counter from start of BMP data */ + +/* read n-byte little-endian integer. Return 1 on EOF or error, else + 0. Assume n<=4. */ +static int bmp_readint(FILE *f, int n, unsigned int *p) { + int i; + unsigned int sum = 0; + int b; + + for (i=0; i<n; i++) { + b = fgetc(f); + if (b==EOF) { + return 1; + } + sum += (unsigned)b << (8*i); + } + bmp_count += n; + bmp_pos += n; + *p = sum; + return 0; +} + +/* reset padding boundary */ +static void bmp_pad_reset(void) { + bmp_count = 0; +} + +/* read padding bytes to 4-byte boundary. Return 1 on EOF or error, + else 0. */ +static int bmp_pad(FILE *f) { + int c, i, b; + + c = (-bmp_count) & 3; + for (i=0; i<c; i++) { + b = fgetc(f); + if (b==EOF) { + return 1; + } + } + bmp_pos += c; + bmp_count = 0; + return 0; +} + +/* forward to the new file position. Return 1 on EOF or error, else 0 */ +static int bmp_forward(FILE *f, int pos) { + int b; + + while (bmp_pos < pos) { + b = fgetc(f); + if (b==EOF) { + return 1; + } + bmp_pos++; + bmp_count++; + } + return 0; +} + +/* safe colortable access */ +#define COLTABLE(c) ((c) < bmpinfo.ncolors ? coltable[(c)] : 0) + +/* read BMP stream after magic number. Return values as for gm_read. + We choose to be as permissive as possible, since there are many + programs out there which produce BMP. For instance, ppmtobmp can + produce codings with anywhere from 1-8 or 24 bits per sample, + although most specifications only allow 1,4,8,24,32. We can also + read both the old and new OS/2 BMP formats in addition to the + Windows BMP format. */ +static int gm_readbody_bmp(FILE *f, greymap_t **gmp) { + bmp_info_t bmpinfo; + int *coltable; + unsigned int b, c; + unsigned int i, j; + greymap_t *gm; + unsigned int x, y; + int col[2]; + unsigned int bitbuf; + unsigned int n; + unsigned int redshift, greenshift, blueshift; + int realheight; /* in case of incomplete file, keeps track of how + many scan lines actually contain data */ + + gm_read_error = NULL; + gm = NULL; + coltable = NULL; + + bmp_pos = 2; /* set file position */ + + /* file header (minus magic number) */ + TRY(bmp_readint(f, 4, &bmpinfo.FileSize)); + TRY(bmp_readint(f, 4, &bmpinfo.reserved)); + TRY(bmp_readint(f, 4, &bmpinfo.DataOffset)); + + /* info header */ + TRY(bmp_readint(f, 4, &bmpinfo.InfoSize)); + if (bmpinfo.InfoSize == 40 || bmpinfo.InfoSize == 64 + || bmpinfo.InfoSize == 108 || bmpinfo.InfoSize == 124) { + /* Windows or new OS/2 format */ + bmpinfo.ctbits = 32; /* sample size in color table */ + TRY(bmp_readint(f, 4, &bmpinfo.w)); + TRY(bmp_readint(f, 4, &bmpinfo.h)); + TRY(bmp_readint(f, 2, &bmpinfo.Planes)); + TRY(bmp_readint(f, 2, &bmpinfo.bits)); + TRY(bmp_readint(f, 4, &bmpinfo.comp)); + TRY(bmp_readint(f, 4, &bmpinfo.ImageSize)); + TRY(bmp_readint(f, 4, &bmpinfo.XpixelsPerM)); + TRY(bmp_readint(f, 4, &bmpinfo.YpixelsPerM)); + TRY(bmp_readint(f, 4, &bmpinfo.ncolors)); + TRY(bmp_readint(f, 4, &bmpinfo.ColorsImportant)); + if (bmpinfo.InfoSize >= 108) { /* V4 and V5 bitmaps */ + TRY(bmp_readint(f, 4, &bmpinfo.RedMask)); + TRY(bmp_readint(f, 4, &bmpinfo.GreenMask)); + TRY(bmp_readint(f, 4, &bmpinfo.BlueMask)); + TRY(bmp_readint(f, 4, &bmpinfo.AlphaMask)); + } + if (bmpinfo.w > 0x7fffffff) { + goto format_error; + } + if (bmpinfo.h > 0x7fffffff) { + bmpinfo.h = (-bmpinfo.h) & 0xffffffff; + bmpinfo.topdown = 1; + } else { + bmpinfo.topdown = 0; + } + if (bmpinfo.h > 0x7fffffff) { + goto format_error; + } + } else if (bmpinfo.InfoSize == 12) { + /* old OS/2 format */ + bmpinfo.ctbits = 24; /* sample size in color table */ + TRY(bmp_readint(f, 2, &bmpinfo.w)); + TRY(bmp_readint(f, 2, &bmpinfo.h)); + TRY(bmp_readint(f, 2, &bmpinfo.Planes)); + TRY(bmp_readint(f, 2, &bmpinfo.bits)); + bmpinfo.comp = 0; + bmpinfo.ncolors = 0; + bmpinfo.topdown = 0; + } else { + goto format_error; + } + + if (bmpinfo.comp == 3 && bmpinfo.InfoSize < 108) { + /* bitfield feature is only understood with V4 and V5 format */ + goto format_error; + } + + if (bmpinfo.comp > 3 || bmpinfo.bits > 32) { + goto format_error; + } + + /* forward to color table (e.g., if bmpinfo.InfoSize == 64) */ + TRY(bmp_forward(f, 14+bmpinfo.InfoSize)); + + if (bmpinfo.Planes != 1) { + gm_read_error = "cannot handle bmp planes"; + goto format_error; /* can't handle planes */ + } + + if (bmpinfo.ncolors == 0 && bmpinfo.bits <= 8) { + bmpinfo.ncolors = 1 << bmpinfo.bits; + } + + /* color table, present only if bmpinfo.bits <= 8. */ + if (bmpinfo.bits <= 8) { + coltable = (int *) calloc(bmpinfo.ncolors, sizeof(int)); + if (!coltable) { + goto std_error; + } + /* NOTE: since we are reading a greymap, we can immediately convert + the color table entries to grey values. */ + for (i=0; i<bmpinfo.ncolors; i++) { + TRY(bmp_readint(f, bmpinfo.ctbits/8, &c)); + c = ((c>>16) & 0xff) + ((c>>8) & 0xff) + (c & 0xff); + coltable[i] = c/3; + } + } + + /* forward to data */ + if (bmpinfo.InfoSize != 12) { /* not old OS/2 format */ + TRY(bmp_forward(f, bmpinfo.DataOffset)); + } + + /* allocate greymap */ + gm = gm_new(bmpinfo.w, bmpinfo.h); + if (!gm) { + goto std_error; + } + + realheight = 0; + + switch (bmpinfo.bits + 0x100*bmpinfo.comp) { + + default: + goto format_error; + break; + + case 0x001: /* monochrome palette */ + + /* raster data */ + for (y=0; y<bmpinfo.h; y++) { + realheight = y+1; + bmp_pad_reset(); + for (i=0; 8*i<bmpinfo.w; i++) { + TRY_EOF(bmp_readint(f, 1, &b)); + for (j=0; j<8; j++) { + GM_PUT(gm, i*8+j, y, b & (0x80 >> j) ? COLTABLE(1) : COLTABLE(0)); + } + } + TRY(bmp_pad(f)); + } + break; + + case 0x002: /* 2-bit to 8-bit palettes */ + case 0x003: + case 0x004: + case 0x005: + case 0x006: + case 0x007: + case 0x008: + for (y=0; y<bmpinfo.h; y++) { + realheight = y+1; + bmp_pad_reset(); + bitbuf = 0; /* bit buffer: bits in buffer are high-aligned */ + n = 0; /* number of bits currently in bitbuffer */ + for (x=0; x<bmpinfo.w; x++) { + if (n < bmpinfo.bits) { + TRY_EOF(bmp_readint(f, 1, &b)); + bitbuf |= b << (INTBITS - 8 - n); + n += 8; + } + b = bitbuf >> (INTBITS - bmpinfo.bits); + bitbuf <<= bmpinfo.bits; + n -= bmpinfo.bits; + GM_UPUT(gm, x, y, COLTABLE(b)); + } + TRY(bmp_pad(f)); + } + break; + + case 0x010: /* 16-bit encoding */ + /* can't do this format because it is not well-documented and I + don't have any samples */ + gm_read_error = "cannot handle bmp 16-bit coding"; + goto format_error; + break; + + case 0x018: /* 24-bit encoding */ + case 0x020: /* 32-bit encoding */ + for (y=0; y<bmpinfo.h; y++) { + realheight = y+1; + bmp_pad_reset(); + for (x=0; x<bmpinfo.w; x++) { + TRY_EOF(bmp_readint(f, bmpinfo.bits/8, &c)); + c = ((c>>16) & 0xff) + ((c>>8) & 0xff) + (c & 0xff); + GM_UPUT(gm, x, y, c/3); + } + TRY(bmp_pad(f)); + } + break; + + case 0x320: /* 32-bit encoding with bitfields */ + redshift = lobit(bmpinfo.RedMask); + greenshift = lobit(bmpinfo.GreenMask); + blueshift = lobit(bmpinfo.BlueMask); + + for (y=0; y<bmpinfo.h; y++) { + realheight = y+1; + bmp_pad_reset(); + for (x=0; x<bmpinfo.w; x++) { + TRY_EOF(bmp_readint(f, bmpinfo.bits/8, &c)); + c = ((c & bmpinfo.RedMask) >> redshift) + ((c & bmpinfo.GreenMask) >> greenshift) + ((c & bmpinfo.BlueMask) >> blueshift); + GM_UPUT(gm, x, y, c/3); + } + TRY(bmp_pad(f)); + } + break; + + case 0x204: /* 4-bit runlength compressed encoding (RLE4) */ + x = 0; + y = 0; + while (1) { + TRY_EOF(bmp_readint(f, 1, &b)); /* opcode */ + TRY_EOF(bmp_readint(f, 1, &c)); /* argument */ + if (b>0) { + /* repeat count */ + col[0] = COLTABLE((c>>4) & 0xf); + col[1] = COLTABLE(c & 0xf); + for (i=0; i<b && x<bmpinfo.w; i++) { + if (x>=bmpinfo.w) { + x=0; + y++; + } + if (x>=bmpinfo.w || y>=bmpinfo.h) { + break; + } + realheight = y+1; + GM_PUT(gm, x, y, col[i&1]); + x++; + } + } else if (c == 0) { + /* end of line */ + y++; + x = 0; + } else if (c == 1) { + /* end of greymap */ + break; + } else if (c == 2) { + /* "delta": skip pixels in x and y directions */ + TRY_EOF(bmp_readint(f, 1, &b)); /* x offset */ + TRY_EOF(bmp_readint(f, 1, &c)); /* y offset */ + x += b; + y += c; + } else { + /* verbatim segment */ + for (i=0; i<c; i++) { + if ((i&1)==0) { + TRY_EOF(bmp_readint(f, 1, &b)); + } + if (x>=bmpinfo.w) { + x=0; + y++; + } + if (x>=bmpinfo.w || y>=bmpinfo.h) { + break; + } + realheight = y+1; + GM_PUT(gm, x, y, COLTABLE((b>>(4-4*(i&1))) & 0xf)); + x++; + } + if ((c+1) & 2) { + /* pad to 16-bit boundary */ + TRY_EOF(bmp_readint(f, 1, &b)); + } + } + } + break; + + case 0x108: /* 8-bit runlength compressed encoding (RLE8) */ + x = 0; + y = 0; + while (1) { + TRY_EOF(bmp_readint(f, 1, &b)); /* opcode */ + TRY_EOF(bmp_readint(f, 1, &c)); /* argument */ + if (b>0) { + /* repeat count */ + for (i=0; i<b; i++) { + if (x>=bmpinfo.w) { + x=0; + y++; + } + if (x>=bmpinfo.w || y>=bmpinfo.h) { + break; + } + realheight = y+1; + GM_PUT(gm, x, y, COLTABLE(c)); + x++; + } + } else if (c == 0) { + /* end of line */ + y++; + x = 0; + } else if (c == 1) { + /* end of greymap */ + break; + } else if (c == 2) { + /* "delta": skip pixels in x and y directions */ + TRY_EOF(bmp_readint(f, 1, &b)); /* x offset */ + TRY_EOF(bmp_readint(f, 1, &c)); /* y offset */ + x += b; + y += c; + } else { + /* verbatim segment */ + for (i=0; i<c; i++) { + TRY_EOF(bmp_readint(f, 1, &b)); + if (x>=bmpinfo.w) { + x=0; + y++; + } + if (x>=bmpinfo.w || y>=bmpinfo.h) { + break; + } + realheight = y+1; + GM_PUT(gm, x, y, COLTABLE(b)); + x++; + } + if (c & 1) { + /* pad input to 16-bit boundary */ + TRY_EOF(bmp_readint(f, 1, &b)); + } + } + } + break; + + } /* switch */ + + /* skip any potential junk after the data section, but don't + complain in case EOF is encountered */ + bmp_forward(f, bmpinfo.FileSize); + + free(coltable); + if (bmpinfo.topdown) { + gm_flip(gm); + } + *gmp = gm; + return 0; + + eof: + TRY_STD(gm_resize(gm, realheight)); + free(coltable); + if (bmpinfo.topdown) { + gm_flip(gm); + } + *gmp = gm; + return 1; + + format_error: + try_error: + free(coltable); + gm_free(gm); + if (!gm_read_error) { + gm_read_error = "invalid bmp file"; + } + return -2; + + std_error: + free(coltable); + gm_free(gm); + return -1; +} + +/* ---------------------------------------------------------------------- */ + +/* write a pgm stream, either P2 or (if raw != 0) P5 format. Include + one-line comment if non-NULL. Mode determines how out-of-range + color values are converted. Gamma is the desired gamma correction, + if any (set to 2.2 if the image is to look optimal on a CRT monitor, + 2.8 for LCD). Set to 1.0 for no gamma correction */ + +int gm_writepgm(FILE *f, greymap_t *gm, const char *comment, int raw, int mode, double gamma) { + int x, y, v; + int gammatable[256]; + + /* prepare gamma correction lookup table */ + if (gamma != 1.0) { + gammatable[0] = 0; + for (v=1; v<256; v++) { + gammatable[v] = (int)(255 * exp(log(v/255.0)/gamma) + 0.5); + } + } else { + for (v=0; v<256; v++) { + gammatable[v] = v; + } + } + + fprintf(f, raw ? "P5\n" : "P2\n"); + if (comment && *comment) { + fprintf(f, "# %s\n", comment); + } + fprintf(f, "%d %d 255\n", gm->w, gm->h); + for (y=gm->h-1; y>=0; y--) { + for (x=0; x<gm->w; x++) { + v = GM_UGET(gm, x, y); + if (mode == GM_MODE_NONZERO) { + if (v > 255) { + v = 510 - v; + } + if (v < 0) { + v = 0; + } + } else if (mode == GM_MODE_ODD) { + v = mod(v, 510); + if (v > 255) { + v = 510 - v; + } + } else if (mode == GM_MODE_POSITIVE) { + if (v < 0) { + v = 0; + } else if (v > 255) { + v = 255; + } + } else if (mode == GM_MODE_NEGATIVE) { + v = 510 - v; + if (v < 0) { + v = 0; + } else if (v > 255) { + v = 255; + } + } + v = gammatable[v]; + + if (raw) { + fputc(v, f); + } else { + fprintf(f, x == gm->w-1 ? "%d\n" : "%d ", v); + } + } + } + return 0; +} + +/* ---------------------------------------------------------------------- */ +/* output - for primitive debugging purposes only! */ + +/* print greymap to screen */ +int gm_print(FILE *f, greymap_t *gm) { + int x, y; + int xx, yy; + int d, t; + int sw, sh; + + sw = gm->w < 79 ? gm->w : 79; + sh = gm->w < 79 ? gm->h : gm->h*sw*44/(79*gm->w); + + for (yy=sh-1; yy>=0; yy--) { + for (xx=0; xx<sw; xx++) { + d=0; + t=0; + for (x=xx*gm->w/sw; x<(xx+1)*gm->w/sw; x++) { + for (y=yy*gm->h/sh; y<(yy+1)*gm->h/sh; y++) { + d += GM_GET(gm, x, y); + t += 256; + } + } + fputc("*#=- "[5*d/t], f); /* what a cute trick :) */ + } + fputc('\n', f); + } + return 0; +} diff --git a/Build/source/libs/potrace/potrace-src/src/greymap.h b/Build/source/libs/potrace/potrace-src/src/greymap.h new file mode 100644 index 00000000000..619ae6c7549 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/greymap.h @@ -0,0 +1,67 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef GREYMAP_H +#define GREYMAP_H + +#include <stdio.h> +#include <stdlib.h> +#include <stddef.h> + +/* type for greymap samples */ +typedef signed short int gm_sample_t; + +#define GM_SAMPLESIZE (sizeof(gm_sample_t)) + +/* internal format for greymaps. Note: in this format, rows are + ordered from bottom to top. The pixels in each row are given from + left to right. */ +struct greymap_s { + int w; /* width, in pixels */ + int h; /* height, in pixels */ + int dy; /* offset between scanlines (in samples); + can be negative */ + gm_sample_t *base; /* root of allocated data */ + gm_sample_t *map; /* points to the lower left pixel */ +}; +typedef struct greymap_s greymap_t; + +/* macros for accessing pixel at index (x,y). Note that the origin is + in the *lower* left corner. U* macros omit the bounds check. */ + +#define gm_scanline(gm, y) ((gm)->map + (ptrdiff_t)(y)*(ptrdiff_t)(gm)->dy) +#define gm_index(gm, x, y) (gm_scanline(gm, y) + (x)) +#define gm_safe(gm, x, y) ((int)(x)>=0 && (int)(x)<(gm)->w && (int)(y)>=0 && (int)(y)<(gm)->h) +#define gm_bound(x, m) ((x)<0 ? 0 : (x)>=(m) ? (m)-1 : (x)) +#define GM_UGET(gm, x, y) (*gm_index(gm, x, y)) +#define GM_UINC(gm, x, y, b) (*gm_index(gm, x, y) += (gm_sample_t)(b)) +#define GM_UINV(gm, x, y) (*gm_index(gm, x, y) = 255 - *gm_index(gm, x, y)) +#define GM_UPUT(gm, x, y, b) (*gm_index(gm, x, y) = (gm_sample_t)(b)) +#define GM_GET(gm, x, y) (gm_safe(gm, x, y) ? GM_UGET(gm, x, y) : 0) +#define GM_INC(gm, x, y, b) (gm_safe(gm, x, y) ? GM_UINC(gm, x, y, b) : 0) +#define GM_INV(gm, x, y) (gm_safe(gm, x, y) ? GM_UINV(gm, x, y) : 0) +#define GM_PUT(gm, x, y, b) (gm_safe(gm, x, y) ? GM_UPUT(gm, x, y, b) : 0) +#define GM_BGET(gm, x, y) ((gm)->w == 0 || (gm)->h == 0 ? 0 : GM_UGET(gm, gm_bound(x, (gm)->w), gm_bound(y, (gm)->h))) + +/* modes for cutting off out-of-range values. The following names + refer to winding numbers. I.e., make a pixel black if winding + number is nonzero, odd, or positive, respectively. We assume that 0 + winding number corresponds to white (255). */ +#define GM_MODE_NONZERO 1 +#define GM_MODE_ODD 2 +#define GM_MODE_POSITIVE 3 +#define GM_MODE_NEGATIVE 4 + +extern const char *gm_read_error; + +greymap_t *gm_new(int w, int h); +greymap_t *gm_dup(greymap_t *gm); +void gm_free(greymap_t *gm); +void gm_clear(greymap_t *gm, int b); +int gm_read(FILE *f, greymap_t **gmp); +int gm_writepgm(FILE *f, greymap_t *gm, const char *comment, int raw, int mode, double gamma); +int gm_print(FILE *f, greymap_t *gm); + +#endif /* GREYMAP_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/include/getopt/getopt.h b/Build/source/libs/potrace/potrace-src/src/include/getopt/getopt.h new file mode 100644 index 00000000000..20daef6168b --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/include/getopt/getopt.h @@ -0,0 +1,180 @@ +/* Declarations for getopt. + Copyright (C) 1989,90,91,92,93,94,96,97,98,99 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. */ + +#ifndef _GETOPT_H + +#ifndef __need_getopt +# define _GETOPT_H 1 +#endif + +/* If __GNU_LIBRARY__ is not already defined, either we are being used + standalone, or this is the first header included in the source file. + If we are being used with glibc, we need to include <features.h>, but + that does not exist if we are standalone. So: if __GNU_LIBRARY__ is + not defined, include <ctype.h>, which will pull in <features.h> for us + if it's from glibc. (Why ctype.h? It's guaranteed to exist and it + doesn't flood the namespace with stuff the way some other headers do.) */ +#if !defined __GNU_LIBRARY__ +# include <ctype.h> +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/* For communication from `getopt' to the caller. + When `getopt' finds an option that takes an argument, + the argument value is returned here. + Also, when `ordering' is RETURN_IN_ORDER, + each non-option ARGV-element is returned here. */ + +extern char *optarg; + +/* Index in ARGV of the next element to be scanned. + This is used for communication to and from the caller + and for communication between successive calls to `getopt'. + + On entry to `getopt', zero means this is the first call; initialize. + + When `getopt' returns -1, this is the index of the first of the + non-option elements that the caller should itself scan. + + Otherwise, `optind' communicates from one call to the next + how much of ARGV has been scanned so far. */ + +extern int optind; + +/* Callers store zero here to inhibit the error message `getopt' prints + for unrecognized options. */ + +extern int opterr; + +/* Set to an option character which was unrecognized. */ + +extern int optopt; + +#ifndef __need_getopt +/* Describe the long-named options requested by the application. + The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector + of `struct option' terminated by an element containing a name which is + zero. + + The field `has_arg' is: + no_argument (or 0) if the option does not take an argument, + required_argument (or 1) if the option requires an argument, + optional_argument (or 2) if the option takes an optional argument. + + If the field `flag' is not NULL, it points to a variable that is set + to the value given in the field `val' when the option is found, but + left unchanged if the option is not found. + + To have a long-named option do something other than set an `int' to + a compiled-in constant, such as set a value from `optarg', set the + option's `flag' field to zero and its `val' field to a nonzero + value (the equivalent single-letter option character, if there is + one). For long options that have a zero `flag' field, `getopt' + returns the contents of the `val' field. */ + +struct option +{ +# if defined __STDC__ && __STDC__ + const char *name; +# else + char *name; +# endif + /* has_arg can't be an enum because some compilers complain about + type mismatches in all the code that assumes it is an int. */ + int has_arg; + int *flag; + int val; +}; + +/* Names for the values of the `has_arg' field of `struct option'. */ + +# define no_argument 0 +# define required_argument 1 +# define optional_argument 2 +#endif /* need getopt */ + + +/* Get definitions and prototypes for functions to process the + arguments in ARGV (ARGC of them, minus the program name) for + options given in OPTS. + + Return the option character from OPTS just read. Return -1 when + there are no more options. For unrecognized options, or options + missing arguments, `optopt' is set to the option letter, and '?' is + returned. + + The OPTS string is a list of characters which are recognized option + letters, optionally followed by colons, specifying that that letter + takes an argument, to be placed in `optarg'. + + If a letter in OPTS is followed by two colons, its argument is + optional. This behavior is specific to the GNU `getopt'. + + The argument `--' causes premature termination of argument + scanning, explicitly telling `getopt' that there are no more + options. + + If OPTS begins with `--', then non-option arguments are treated as + arguments to the option '\0'. This behavior is specific to the GNU + `getopt'. */ + +#if defined __STDC__ && __STDC__ +# ifdef __GNU_LIBRARY__ +/* Many other libraries have conflicting prototypes for getopt, with + differences in the consts, in stdlib.h. To avoid compilation + errors, only prototype getopt for the GNU C library. */ +extern int getopt (int argc, char *const *argv, const char *shortopts); +# else /* not __GNU_LIBRARY__ */ +extern int getopt (); +# endif /* __GNU_LIBRARY__ */ + +# ifndef __need_getopt +extern int getopt_long (int argc, char *const *argv, const char *shortopts, + const struct option *longopts, int *longind); +extern int getopt_long_only (int argc, char *const *argv, + const char *shortopts, + const struct option *longopts, int *longind); + +/* Internal only. Users should not call this directly. */ +extern int _getopt_internal (int argc, char *const *argv, + const char *shortopts, + const struct option *longopts, int *longind, + int long_only); +# endif +#else /* not __STDC__ */ +extern int getopt (); +# ifndef __need_getopt +extern int getopt_long (); +extern int getopt_long_only (); + +extern int _getopt_internal (); +# endif +#endif /* __STDC__ */ + +#ifdef __cplusplus +} +#endif + +/* Make sure we later can get all the definitions and declarations. */ +#undef __need_getopt + +#endif /* getopt.h */ diff --git a/Build/source/libs/potrace/potrace-src/src/libpotrace-export.sym b/Build/source/libs/potrace/potrace-src/src/libpotrace-export.sym new file mode 100644 index 00000000000..74d55c87482 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/libpotrace-export.sym @@ -0,0 +1,5 @@ +potrace_state_free +potrace_param_default +potrace_trace +potrace_param_free +potrace_version diff --git a/Build/source/libs/potrace/potrace-src/src/lists.h b/Build/source/libs/potrace/potrace-src/src/lists.h new file mode 100644 index 00000000000..507cf15bdfb --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/lists.h @@ -0,0 +1,285 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef _PS_LISTS_H +#define _PS_LISTS_H + +/* here we define some general list macros. Because they are macros, + they should work on any datatype with a "->next" component. Some of + them use a "hook". If elt and list are of type t* then hook is of + type t**. A hook stands for an insertion point in the list, i.e., + either before the first element, or between two elements, or after + the last element. If an operation "sets the hook" for an element, + then the hook is set to just before the element. One can insert + something at a hook. One can also unlink at a hook: this means, + unlink the element just after the hook. By "to unlink", we mean the + element is removed from the list, but not deleted. Thus, it and its + components still need to be freed. */ + +/* Note: these macros are somewhat experimental. Only the ones that + are actually *used* have been tested. So be careful to test any + that you use. Looking at the output of the preprocessor, "gcc -E" + (possibly piped though "indent"), might help too. Also: these + macros define some internal (local) variables that start with + "_". */ + +/* we enclose macro definitions whose body consists of more than one + statement in MACRO_BEGIN and MACRO_END, rather than '{' and '}'. The + reason is that we want to be able to use the macro in a context + such as "if (...) macro(...); else ...". If we didn't use this obscure + trick, we'd have to omit the ";" in such cases. */ + +#define MACRO_BEGIN do { +#define MACRO_END } while (0) + +/* ---------------------------------------------------------------------- */ +/* macros for singly-linked lists */ + +/* traverse list. At the end, elt is set to NULL. */ +#define list_forall(elt, list) for (elt=list; elt!=NULL; elt=elt->next) + +/* set elt to the first element of list satisfying boolean condition + c, or NULL if not found */ +#define list_find(elt, list, c) \ + MACRO_BEGIN list_forall(elt, list) if (c) break; MACRO_END + +/* like forall, except also set hook for elt. */ +#define list_forall2(elt, list, hook) \ + for (elt=list, hook=&list; elt!=NULL; hook=&elt->next, elt=elt->next) + +/* same as list_find, except also set hook for elt. */ +#define list_find2(elt, list, c, hook) \ + MACRO_BEGIN list_forall2(elt, list, hook) if (c) break; MACRO_END + +/* same, except only use hook. */ +#define _list_forall_hook(list, hook) \ + for (hook=&list; *hook!=NULL; hook=&(*hook)->next) + +/* same, except only use hook. Note: c may only refer to *hook, not elt. */ +#define _list_find_hook(list, c, hook) \ + MACRO_BEGIN _list_forall_hook(list, hook) if (c) break; MACRO_END + +/* insert element after hook */ +#define list_insert_athook(elt, hook) \ + MACRO_BEGIN elt->next = *hook; *hook = elt; MACRO_END + +/* insert element before hook */ +#define list_insert_beforehook(elt, hook) \ + MACRO_BEGIN elt->next = *hook; *hook = elt; hook=&elt->next; MACRO_END + +/* unlink element after hook, let elt be unlinked element, or NULL. + hook remains. */ +#define list_unlink_athook(list, elt, hook) \ + MACRO_BEGIN \ + elt = hook ? *hook : NULL; if (elt) { *hook = elt->next; elt->next = NULL; }\ + MACRO_END + +/* unlink the specific element, if it is in the list. Otherwise, set + elt to NULL */ +#define list_unlink(listtype, list, elt) \ + MACRO_BEGIN \ + listtype **_hook; \ + _list_find_hook(list, *_hook==elt, _hook); \ + list_unlink_athook(list, elt, _hook); \ + MACRO_END + +/* prepend elt to list */ +#define list_prepend(list, elt) \ + MACRO_BEGIN elt->next = list; list = elt; MACRO_END + +/* append elt to list. */ +#define list_append(listtype, list, elt) \ + MACRO_BEGIN \ + listtype **_hook; \ + _list_forall_hook(list, _hook) {} \ + list_insert_athook(elt, _hook); \ + MACRO_END + +/* unlink the first element that satisfies the condition. */ +#define list_unlink_cond(listtype, list, elt, c) \ + MACRO_BEGIN \ + listtype **_hook; \ + list_find2(elt, list, c, _hook); \ + list_unlink_athook(list, elt, _hook); \ + MACRO_END + +/* let elt be the nth element of the list, starting to count from 0. + Return NULL if out of bounds. */ +#define list_nth(elt, list, n) \ + MACRO_BEGIN \ + int _x; /* only evaluate n once */ \ + for (_x=(n), elt=list; _x && elt; _x--, elt=elt->next) {} \ + MACRO_END + +/* let elt be the nth element of the list, starting to count from 0. + Return NULL if out of bounds. */ +#define list_nth_hook(elt, list, n, hook) \ + MACRO_BEGIN \ + int _x; /* only evaluate n once */ \ + for (_x=(n), elt=list, hook=&list; _x && elt; _x--, hook=&elt->next, elt=elt->next) {} \ + MACRO_END + +/* set n to the length of the list */ +#define list_length(listtype, list, n) \ + MACRO_BEGIN \ + listtype *_elt; \ + n=0; \ + list_forall(_elt, list) \ + n++; \ + MACRO_END + +/* set n to the index of the first element satisfying cond, or -1 if + none found. Also set elt to the element, or NULL if none found. */ +#define list_index(list, n, elt, c) \ + MACRO_BEGIN \ + n=0; \ + list_forall(elt, list) { \ + if (c) break; \ + n++; \ + } \ + if (!elt) \ + n=-1; \ + MACRO_END + +/* set n to the number of elements in the list that satisfy condition c */ +#define list_count(list, n, elt, c) \ + MACRO_BEGIN \ + n=0; \ + list_forall(elt, list) { \ + if (c) n++; \ + } \ + MACRO_END + +/* let elt be each element of the list, unlinked. At the end, set list=NULL. */ +#define list_forall_unlink(elt, list) \ + for (elt=list; elt ? (list=elt->next, elt->next=NULL), 1 : 0; elt=list) + +/* reverse a list (efficient) */ +#define list_reverse(listtype, list) \ + MACRO_BEGIN \ + listtype *_list1=NULL, *elt; \ + list_forall_unlink(elt, list) \ + list_prepend(_list1, elt); \ + list = _list1; \ + MACRO_END + +/* insert the element ELT just before the first element TMP of the + list for which COND holds. Here COND must be a condition of ELT and + TMP. Typical usage is to insert an element into an ordered list: + for instance, list_insert_ordered(listtype, list, elt, tmp, + elt->size <= tmp->size). Note: if we give a "less than or equal" + condition, the new element will be inserted just before a sequence + of equal elements. If we give a "less than" condition, the new + element will be inserted just after a list of equal elements. + Note: it is much more efficient to construct a list with + list_prepend and then order it with list_merge_sort, than to + construct it with list_insert_ordered. */ +#define list_insert_ordered(listtype, list, elt, tmp, cond) \ + MACRO_BEGIN \ + listtype **_hook; \ + _list_find_hook(list, (tmp=*_hook, (cond)), _hook); \ + list_insert_athook(elt, _hook); \ + MACRO_END + +/* sort the given list, according to the comparison condition. + Typical usage is list_sort(listtype, list, a, b, a->size < + b->size). Note: if we give "less than or equal" condition, each + segment of equal elements will be reversed in order. If we give a + "less than" condition, each segment of equal elements will retain + the original order. The latter is slower but sometimes + prettier. Average running time: n*n/2. */ +#define list_sort(listtype, list, a, b, cond) \ + MACRO_BEGIN \ + listtype *_newlist=NULL; \ + list_forall_unlink(a, list) \ + list_insert_ordered(listtype, _newlist, a, b, cond); \ + list = _newlist; \ + MACRO_END + +/* a much faster sort algorithm (merge sort, n log n worst case). It + is required that the list type has an additional, unused next1 + component. Note there is no curious reversal of order of equal + elements as for list_sort. */ + +#define list_mergesort(listtype, list, a, b, cond) \ + MACRO_BEGIN \ + listtype *_elt, **_hook1; \ + \ + for (_elt=list; _elt; _elt=_elt->next1) { \ + _elt->next1 = _elt->next; \ + _elt->next = NULL; \ + } \ + do { \ + _hook1 = &(list); \ + while ((a = *_hook1) != NULL && (b = a->next1) != NULL ) { \ + _elt = b->next1; \ + _list_merge_cond(listtype, a, b, cond, *_hook1); \ + _hook1 = &((*_hook1)->next1); \ + *_hook1 = _elt; \ + } \ + } while (_hook1 != &(list)); \ + MACRO_END + +/* merge two sorted lists. Store result at &result */ +#define _list_merge_cond(listtype, a, b, cond, result) \ + MACRO_BEGIN \ + listtype **_hook; \ + _hook = &(result); \ + while (1) { \ + if (a==NULL) { \ + *_hook = b; \ + break; \ + } else if (b==NULL) { \ + *_hook = a; \ + break; \ + } else if (cond) { \ + *_hook = a; \ + _hook = &(a->next); \ + a = a->next; \ + } else { \ + *_hook = b; \ + _hook = &(b->next); \ + b = b->next; \ + } \ + } \ + MACRO_END + +/* ---------------------------------------------------------------------- */ +/* macros for doubly-linked lists */ + +#define dlist_append(head, end, elt) \ + MACRO_BEGIN \ + elt->prev = end; \ + elt->next = NULL; \ + if (end) { \ + end->next = elt; \ + } else { \ + head = elt; \ + } \ + end = elt; \ + MACRO_END + +/* let elt be each element of the list, unlinked. At the end, set list=NULL. */ +#define dlist_forall_unlink(elt, head, end) \ + for (elt=head; elt ? (head=elt->next, elt->next=NULL, elt->prev=NULL), 1 : (end=NULL, 0); elt=head) + +/* unlink the first element of the list */ +#define dlist_unlink_first(head, end, elt) \ + MACRO_BEGIN \ + elt = head; \ + if (head) { \ + head = head->next; \ + if (head) { \ + head->prev = NULL; \ + } else { \ + end = NULL; \ + } \ + elt->prev = NULL; \ + elt->next = NULL; \ + } \ + MACRO_END + +#endif /* _PS_LISTS_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/lzw.c b/Build/source/libs/potrace/potrace-src/src/lzw.c new file mode 100644 index 00000000000..2c90d6b2d76 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/lzw.c @@ -0,0 +1,415 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +/* code for adaptive LZW compression, as used in PostScript. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdlib.h> +#include <stdio.h> +#include <errno.h> +#include <string.h> + +#include "lists.h" +#include "bitops.h" +#include "lzw.h" + +/* ---------------------------------------------------------------------- */ +/* compression state specification */ + +/* The compression algorithm follows the following specification, + expressed as a state machine. A state is a triple {s,d,n}, where s + is a string of input symbols, d is a dictionary, which is a + function from strings to output symbols, and n is the dictionary + size, or equivalently, the next unused output symbol. There are + also special states init and stop. emit[b, code] is a function + which emits the code 'code' as a b-bit value into the output + bitstream. hibit(n) returns the least number of binary digits + required to represent n. + + init ---> {[], newdict, 258} + + where [] is the empty string, and newdict maps each of the 256 + singleton strings to itself. (Note that there are two special + output symbols 256 and 257, so that the next available one is + 258). Note: hibit(258)=9. + + {[], d, n} (input c) ---> (emit[hibit(n), 256]) {c, d, n} + + {s,d,n} (input c) ---> {s*c,d,n} + + if s!=[], s*c is in the domain of d. Here s*c is the strings s + extended by the character c. + + {s,d,n} (input c) ---> (emit[hibit(n), d(s)]) {c,d',n+1} + + if s!=[], s*c is not in the domain of d, and hibit(n+2) <= 12. + Here d'=d+{s*c->n}. + + {s,d,n} (input c) ---> + (emit[hibit(n), d(s)]) (emit[hibit(n+1), 256]) {c, newdict, 258} + + if s!=[], s*c is not in the domain of d, and hibit(n+2) > 12. + + {s,d,n} (input EOD) ---> (emit[hibit(n), d(s)]) (emit[hibit(n+1), 257]) stop + + where s != []. Here, EOD stands for end-of-data. + + {[],d,n} (input EOD) ---> (emit[hibit(n), 256]) (emit[hibit(n), 257]) stop + + Notes: + + * Each reachable state {s,d,n} satisfies hibit(n+1) <= 12. + * Only codes of 12 or fewer bits are emitted. + * Each reachable state {s,d,n} satisfies s=[] or s is in the domain of d. + * The domain of d is always prefix closed (except for the empty prefix) + * The state machine is deterministic and non-blocking. + +*/ + + +/* ---------------------------------------------------------------------- */ +/* private state */ + +#define BITBUF_TYPE unsigned int + +/* the dictionary is implemented as a tree of strings under the prefix + order. The tree is in turns represented as a linked list of + lzw_dict_t structures, with "children" pointing to a node's first + child, and "next" pointing to a node's next sibling. As an + optimization, the top-level nodes (singleton strings) are + implemented lazily, i.e., the corresponding entry is not actually + created until it is accessed. */ + +struct lzw_dict_s { + char c; /* last character of string represented by this entry */ + unsigned int code; /* code for the string represented by this entry */ + int freq; /* how often searched? For optimization only */ + struct lzw_dict_s *children; /* list of sub-entries */ + struct lzw_dict_s *next; /* for making a linked list */ +}; +typedef struct lzw_dict_s lzw_dict_t; + +/* A state {s,d,n} is represented by the "dictionary state" part of + the lzw_state_t structure. Here, s is a pointer directly to the node + of the dictionary structure corresponding to the string s, or NULL + if s=[]. Further, the lzw_state_t structure contains a buffer of + pending output bits, and a flag indicating whether the EOD (end of + data) has been reached in the input. */ + +struct lzw_state_s { + /* dictionary state */ + int n; /* current size of the dictionary */ + lzw_dict_t *d; /* pointer to dictionary */ + lzw_dict_t *s; /* pointer to current string, or NULL at beginning */ + + /* buffers for pending output */ + BITBUF_TYPE buf; /* bits scheduled for output - left aligned, 0 padded */ + int bufsize; /* number of bits scheduled for output. */ + int eod; /* flush buffer? */ +}; +typedef struct lzw_state_s lzw_state_t; + +/* ---------------------------------------------------------------------- */ +/* auxiliary functions which operate on dictionary states */ + +/* recursively free an lzw_dict_t object */ +static void lzw_free_dict(lzw_dict_t *s) { + lzw_dict_t *e; + + list_forall_unlink(e, s) { + lzw_free_dict(e->children); + free(e); + } +} + +/* re-initialize the lzw state's dictionary state to "newdict", + freeing any old dictionary. */ +static void lzw_clear_table(lzw_state_t *st) { + + lzw_free_dict(st->d); + st->d = NULL; + st->n = 258; + st->s = NULL; +} + +/* ---------------------------------------------------------------------- */ +/* auxiliary functions for reading/writing the bit buffer */ + +/* write the code to the bit buffer. Precondition st->bufsize <= 7. + Note: this does not change the dictionary state; in particular, + n must be updated between consecutive calls. */ +static inline void lzw_emit(unsigned int code, lzw_state_t *st) { + BITBUF_TYPE mask; + int bits = hibit(st->n); + + /* fill bit buffer */ + mask = (1 << bits) - 1; + code &= mask; + + st->buf |= code << (8*sizeof(BITBUF_TYPE) - st->bufsize - bits); + st->bufsize += bits; +} + +/* transfer one byte from bit buffer to output. Precondition: + s->avail_out > 0. */ +static inline void lzw_read_bitbuf(lzw_stream_t *s) { + int ch; + lzw_state_t *st = (lzw_state_t *)s->internal; + + ch = st->buf >> (8*sizeof(BITBUF_TYPE)-8); + st->buf <<= 8; + st->bufsize -= 8; + + s->next_out[0] = ch; + s->next_out++; + s->avail_out--; +} + +/* ---------------------------------------------------------------------- */ +/* The following functions implement the state machine. */ + +/* perform state transition of the state st on input character + ch. This updates the dictionary state and/or writes to the bit + buffer. Precondition: st->bufsize <= 7. Return 0 on success, or 1 + on error with errno set. */ +static int lzw_encode_char(lzw_state_t *st, char c) { + lzw_dict_t *e; + + /* st = {s,d,n}. hibit(n+1)<=12. */ + + /* {[], d, n} (input c) ---> (emit[hibit(n), 256]) {c, d, n} */ + if (st->s == NULL) { + lzw_emit(256, st); + goto singleton; /* enter singleton state c */ + } + + /* {s,d,n} (input c) ---> {s*c,d,n} */ + list_find(e, st->s->children, e->c == c); + if (e) { + e->freq++; + st->s = e; + return 0; + } + + /* {s,d,n} (input c) ---> (emit[hibit(n), d(s)]) {c,d',n+1} */ + /* {s,d,n} (input c) ---> + (emit[hibit(n), d(s)]) (emit[hibit(n+1), 256]) {c, newdict, 258} */ + + lzw_emit(st->s->code, st); /* 9-12 bits */ + if (st->n >= 4094) { /* hibit(n+2) > 12 */ + st->n++; + lzw_emit(256, st); + goto dictfull; /* reset dictionary and enter singleton state c */ + } + + /* insert new code in dictionary, if possible */ + e = (lzw_dict_t *)malloc(sizeof(lzw_dict_t)); + if (!e) { + return 1; + } + e->c = c; + e->code = st->n; + e->freq = 1; + e->children = NULL; + list_prepend(st->s->children, e); + st->n++; + goto singleton; /* enter singleton state c */ + + dictfull: /* reset dictionary and enter singleton state c */ + lzw_clear_table(st); + /* fall through */ + + singleton: /* enter singleton state c */ + list_find(e, st->d, e->c == c); + if (!e) { /* not found: lazily add it */ + e = (lzw_dict_t *)malloc(sizeof(lzw_dict_t)); + if (!e) { + return 1; + } + e->c = c; + e->code = (unsigned char)c; + e->freq = 0; + e->children = NULL; + list_prepend(st->d, e); + } + e->freq++; + st->s = e; + return 0; +} + +/* perform state transition of the state st on input EOD. The leaves + the dictionary state undefined and writes to the bit buffer. + Precondition: st->bufsize <= 7. This function must be called + exactly once, at the end of the stream. */ +static void lzw_encode_eod(lzw_state_t *st) { + + /* {[],d,n} (input EOD) ---> + (emit[hibit(n), 256]) (emit[hibit(n), 257]) stop */ + if (st->s == NULL) { + lzw_emit(256, st); /* 9 bits */ + st->n=258; + lzw_emit(257, st); /* 9 bits */ + return; + } + + /* {s,d,n} (input EOD) ---> + (emit[hibit(n), code]) (emit[hibit(n+1), 257]) stop */ + + lzw_emit(st->s->code, st); /* 9-12 bits */ + st->n++; + lzw_emit(257, st); /* 9-12 bits */ + return; +} + +/* ---------------------------------------------------------------------- */ +/* User visible functions. These implement a buffer interface. See + lzw.h for the API description. */ + +lzw_stream_t *lzw_init(void) { + lzw_stream_t *s = NULL; + lzw_state_t *st = NULL; + + s = (lzw_stream_t *)malloc(sizeof(lzw_stream_t)); + if (s==NULL) { + goto fail; + } + st = (lzw_state_t *)malloc(sizeof(lzw_state_t)); + if (st==NULL) { + goto fail; + } + st->buf = 0; + st->bufsize = 0; + st->eod = 0; + st->d = NULL; + lzw_clear_table(st); + s->internal = (void *) st; + return s; + + fail: + free(s); + free(st); + return NULL; +} + +int lzw_compress(lzw_stream_t *s, int mode) { + int r; + lzw_state_t *st = (lzw_state_t *)s->internal; + + while (st->eod == 0) { + /* empty bit buffer */ + while (st->bufsize > 7) { + if (s->avail_out == 0) { + return 0; + } else { + lzw_read_bitbuf(s); + } + } + /* fill bit buffer */ + if (s->avail_in == 0) { + break; + } else { + r = lzw_encode_char(st, s->next_in[0]); + if (r) { + if (r==2) { + errno = EINVAL; + } + return 1; + } + s->next_in++; + s->avail_in--; + } + } + + if (mode==LZW_EOD && st->eod == 0) { + st->eod = 1; + lzw_encode_eod(st); + } + + /* flush bit buffer */ + if (st->eod) { + while (st->bufsize > 0) { + if (s->avail_out == 0) { + return 0; + } else { + lzw_read_bitbuf(s); + } + } + } + + return 0; +} + +void lzw_free(lzw_stream_t *s) { + lzw_state_t *st = (lzw_state_t *)s->internal; + + lzw_free_dict(st->d); + free(st); + free(s); +} + +/* ---------------------------------------------------------------------- */ +/* main function for testing and illustration purposes */ + +#ifdef LZW_MAIN + +int main() { + lzw_stream_t *s; + int ch; + char inbuf[100]; + char outbuf[100]; + int i, r; + int mode; + + s = lzw_init(); + if (!s) { + goto error; + } + mode = LZW_NORMAL; + + while (1) { + /* fill inbuf */ + for (i=0; i<100; i++) { + ch = fgetc(stdin); + if (ch==EOF) { + break; + } + inbuf[i] = ch; + } + if (i<100) { /* end of input */ + mode = LZW_EOD; + } + + /* compress */ + s->next_in = inbuf; + s->avail_in = i; + do { + s->next_out = outbuf; + s->avail_out = 100; + r = lzw_compress(s, mode); + if (r) { + goto error; + } + fwrite(outbuf, 1, 100-s->avail_out, stdout); + } while (s->avail_out==0); + if (mode == LZW_EOD) { + break; + } + } + fflush(stdout); + lzw_free(s); + + return 0; + + error: + fprintf(stderr, "lzw: %s\n", strerror(errno)); + lzw_free(s); + return 1; + +} +#endif + diff --git a/Build/source/libs/potrace/potrace-src/src/lzw.h b/Build/source/libs/potrace/potrace-src/src/lzw.h new file mode 100644 index 00000000000..695a0c81023 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/lzw.h @@ -0,0 +1,50 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#define LZW_NORMAL 0 +#define LZW_EOD 1 + +/* user visible state */ + +struct lzw_stream_s { + const char *next_in; /* pointer to next input character */ + int avail_in; /* number of input chars available */ + char *next_out; /* pointer to next free byte in output buffer */ + int avail_out; /* remaining size of output buffer */ + + void *internal; /* internal state, not user accessible */ +}; +typedef struct lzw_stream_s lzw_stream_t; + +/* user visible functions */ + +/* The interface for compression and decompression is the same. The + application must first call lzw_init to create and initialize a + compression object. Then it calls lzw_compress on this object + repeatedly, as follows: next_in and next_out must point to valid, + non-overlapping regions of memory of size at least avail_in and + avail_out, respectively. The lzw_compress function will read and + process as many input bytes as possible as long as there is room in + the output buffer. It will update next_in, avail_in, next_out, and + avail_out accordingly. Some input may be consumed without producing + any output, or some output may be produced without consuming any + input. However, the lzw_compress function makes progress in the + sense that, after calling this function, at least one of avail_in + or avail_out is guaranteed to be 0. The mode flag is normally set + to LZW_NORMAL. It can be set to LZW_EOD (end of data) to indicate + that the current input buffer represents the entire remaining input + data stream. When called with mode=LZW_EOD, and avail_out is + non-zero after the call, then the application may conclude that the + end of output has been reached. (However, if avail_out==0 after the + call, then lzw_compress should be called again with the remaining + input, if any). Finally, lzw_free should be called to deallocate + the lzw_stream. Lzw_init returns NULL on error, with errno + set. Lzw_compress returns 0 on success, and 1 on error with errno + set. EINVAL is used to indicate an internal error, which should not + happen. */ + +lzw_stream_t *lzw_init(void); +int lzw_compress(lzw_stream_t *s, int mode); +void lzw_free(lzw_stream_t *s); diff --git a/Build/source/libs/potrace/potrace-src/src/main.c b/Build/source/libs/potrace/potrace-src/src/main.c new file mode 100644 index 00000000000..2785b19bb6e --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/main.c @@ -0,0 +1,1269 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <strings.h> +#include <getopt.h> +#include <math.h> + +#include "main.h" +#include "potracelib.h" +#include "backend_pdf.h" +#include "backend_eps.h" +#include "backend_pgm.h" +#include "backend_svg.h" +#include "backend_xfig.h" +#include "backend_dxf.h" +#include "backend_geojson.h" +#include "potracelib.h" +#include "bitmap_io.h" +#include "bitmap.h" +#include "platform.h" +#include "auxiliary.h" +#include "progress_bar.h" +#include "trans.h" + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +#define UNDEF ((double)(1e30)) /* a value to represent "undefined" */ + +struct info_s info; + +/* ---------------------------------------------------------------------- */ +/* some data structures for option processing */ + +struct pageformat_s { + const char *name; + int w, h; +}; +typedef struct pageformat_s pageformat_t; + +/* dimensions of the various page formats, in postscript points */ +static pageformat_t pageformat[] = { + { "a4", 595, 842 }, + { "a3", 842, 1191 }, + { "a5", 421, 595 }, + { "b5", 516, 729 }, + { "letter", 612, 792 }, + { "legal", 612, 1008 }, + { "tabloid", 792, 1224 }, + { "statement", 396, 612 }, + { "executive", 540, 720 }, + { "folio", 612, 936 }, + { "quarto", 610, 780 }, + { "10x14", 720, 1008 }, + { NULL, 0, 0 }, +}; + +struct turnpolicy_s { + const char *name; + int n; +}; +typedef struct turnpolicy_s turnpolicy_t; + +/* names of turn policies */ +static turnpolicy_t turnpolicy[] = { + {"black", POTRACE_TURNPOLICY_BLACK}, + {"white", POTRACE_TURNPOLICY_WHITE}, + {"left", POTRACE_TURNPOLICY_LEFT}, + {"right", POTRACE_TURNPOLICY_RIGHT}, + {"minority", POTRACE_TURNPOLICY_MINORITY}, + {"majority", POTRACE_TURNPOLICY_MAJORITY}, + {"random", POTRACE_TURNPOLICY_RANDOM}, + {NULL, 0}, +}; + +/* backends and their characteristics */ +struct backend_s { + const char *name; /* name of this backend */ + const char *ext; /* file extension */ + int fixed; /* fixed page size backend? */ + int pixel; /* pixel-based backend? */ + int multi; /* multi-page backend? */ + int (*init_f)(FILE *fout); /* initialization function */ + int (*page_f)(FILE *fout, potrace_path_t *plist, imginfo_t *imginfo); + /* per-bitmap function */ + int (*term_f)(FILE *fout); /* finalization function */ + int opticurve; /* opticurve capable (true Bezier curves?) */ +}; +typedef struct backend_s backend_t; + +static backend_t backend[] = { + { "svg", ".svg", 0, 0, 0, NULL, page_svg, NULL, 1 }, + { "pdf", ".pdf", 0, 0, 1, init_pdf, page_pdf, term_pdf, 1 }, + { "pdfpage", ".pdf", 1, 0, 1, init_pdf, page_pdfpage, term_pdf, 1 }, + { "eps", ".eps", 0, 0, 0, NULL, page_eps, NULL, 1 }, + { "postscript", ".ps", 1, 0, 1, init_ps, page_ps, term_ps, 1 }, + { "ps", ".ps", 1, 0, 1, init_ps, page_ps, term_ps, 1 }, + { "dxf", ".dxf", 0, 1, 0, NULL, page_dxf, NULL, 1 }, + { "geojson", ".json",0, 1, 0, NULL, page_geojson, NULL, 1 }, + { "pgm", ".pgm", 0, 1, 1, NULL, page_pgm, NULL, 1 }, + { "gimppath", ".svg", 0, 1, 0, NULL, page_gimp, NULL, 1 }, + { "xfig", ".fig", 1, 0, 0, NULL, page_xfig, NULL, 0 }, + { NULL, NULL, 0, 0, 0, NULL, NULL, NULL, 0 }, +}; + +/* look up a backend by name. If found, return 0 and set *bp. If not + found leave *bp unchanged and return 1, or 2 on ambiguous + prefix. */ +static int backend_lookup(const char *name, backend_t **bp) { + int i; + int m=0; /* prefix matches */ + backend_t *b = NULL; + + for (i=0; backend[i].name; i++) { + if (strcasecmp(backend[i].name, name)==0) { + *bp = &backend[i]; + return 0; + } else if (strncasecmp(backend[i].name, name, strlen(name))==0) { + m++; + b = &backend[i]; + } + } + /* if there was no exact match, and exactly one prefix match, use that */ + if (m==1) { + *bp = b; + return 0; + } else if (m) { + return 2; + } else { + return 1; + } +} + +/* list all available backends by name, in a comma separated list. + Assume the cursor starts in column j, and break lines at length + linelen. Do not output any trailing punctuation. Return the column + the cursor is in. */ +static int backend_list(FILE *fout, int j, int linelen) { + int i; + + for (i=0; backend[i].name; i++) { + if (j + (int)strlen(backend[i].name) > linelen) { + fprintf(fout, "\n"); + j = 0; + } + j += fprintf(fout, "%s", backend[i].name); + if (backend[i+1].name) { + j += fprintf(fout, ", "); + } + } + return j; +} + +/* ---------------------------------------------------------------------- */ +/* some info functions */ + +static void license(FILE *f) { + fprintf(f, + "This program is free software; you can redistribute it and/or modify\n" + "it under the terms of the GNU General Public License as published by\n" + "the Free Software Foundation; either version 2 of the License, or\n" + "(at your option) any later version.\n" + "\n" + "This program is distributed in the hope that it will be useful,\n" + "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" + "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" + "GNU General Public License for more details.\n" + "\n" + "You should have received a copy of the GNU General Public License\n" + "along with this program; if not, write to the Free Software Foundation\n" + "Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\n" + ); +} + +static void show_defaults(FILE *f) { + fprintf(f, "Default unit: " DEFAULT_DIM_NAME "\n"); + fprintf(f, "Default page size: " DEFAULT_PAPERFORMAT "\n"); +} + +static void usage(FILE *f) { + int j; + + fprintf(f, "Usage: " POTRACE " [options] [filename...]\n"); + fprintf(f, "General options:\n"); + fprintf(f, " -h, --help - print this help message and exit\n"); + fprintf(f, " -v, --version - print version info and exit\n"); + fprintf(f, " -l, --license - print license info and exit\n"); + fprintf(f, "File selection:\n"); + fprintf(f, " <filename> - an input file\n"); + fprintf(f, " -o, --output <filename> - write all output to this file\n"); + fprintf(f, " -- - end of options; 0 or more input filenames follow\n"); + fprintf(f, "Backend selection:\n"); + fprintf(f, " -b, --backend <name> - select backend by name\n"); + fprintf(f, " -b svg, -s, --svg - SVG backend (scalable vector graphics)\n"); + fprintf(f, " -b pdf - PDF backend (portable document format)\n"); + fprintf(f, " -b pdfpage - fixed page-size PDF backend\n"); + fprintf(f, " -b eps, -e, --eps - EPS backend (encapsulated PostScript) (default)\n"); + fprintf(f, " -b ps, -p, --postscript - PostScript backend\n"); + fprintf(f, " -b pgm, -g, --pgm - PGM backend (portable greymap)\n"); + fprintf(f, " -b dxf - DXF backend (drawing interchange format)\n"); + fprintf(f, " -b geojson - GeoJSON backend\n"); + fprintf(f, " -b gimppath - Gimppath backend (GNU Gimp)\n"); + fprintf(f, " -b xfig - XFig backend\n"); + fprintf(f, "Algorithm options:\n"); + fprintf(f, " -z, --turnpolicy <policy> - how to resolve ambiguities in path decomposition\n"); + fprintf(f, " -t, --turdsize <n> - suppress speckles of up to this size (default 2)\n"); + fprintf(f, " -a, --alphamax <n> - corner threshold parameter (default 1)\n"); + fprintf(f, " -n, --longcurve - turn off curve optimization\n"); + fprintf(f, " -O, --opttolerance <n> - curve optimization tolerance (default 0.2)\n"); + fprintf(f, " -u, --unit <n> - quantize output to 1/unit pixels (default 10)\n"); + fprintf(f, " -d, --debug <n> - produce debugging output of type n (n=1,2,3)\n"); + fprintf(f, "Scaling and placement options:\n"); + fprintf(f, " -P, --pagesize <format> - page size (default is " DEFAULT_PAPERFORMAT ")\n"); + fprintf(f, " -W, --width <dim> - width of output image\n"); + fprintf(f, " -H, --height <dim> - height of output image\n"); + fprintf(f, " -r, --resolution <n>[x<n>] - resolution (in dpi) (dimension-based backends)\n"); + fprintf(f, " -x, --scale <n>[x<n>] - scaling factor (pixel-based backends)\n"); + fprintf(f, " -S, --stretch <n> - yresolution/xresolution\n"); + fprintf(f, " -A, --rotate <angle> - rotate counterclockwise by angle\n"); + fprintf(f, " -M, --margin <dim> - margin\n"); + fprintf(f, " -L, --leftmargin <dim> - left margin\n"); + fprintf(f, " -R, --rightmargin <dim> - right margin\n"); + fprintf(f, " -T, --topmargin <dim> - top margin\n"); + fprintf(f, " -B, --bottommargin <dim> - bottom margin\n"); + fprintf(f, " --tight - remove whitespace around the input image\n"); + fprintf(f, "Color options, supported by some backends:\n"); + fprintf(f, " -C, --color #rrggbb - set foreground color (default black)\n"); + fprintf(f, " --fillcolor #rrggbb - set fill color (default transparent)\n"); + fprintf(f, " --opaque - make white shapes opaque\n"); + fprintf(f, "SVG options:\n"); + fprintf(f, " --group - group related paths together\n"); + fprintf(f, " --flat - whole image as a single path\n"); + fprintf(f, "Postscript/EPS/PDF options:\n"); + fprintf(f, " -c, --cleartext - do not compress the output\n"); + fprintf(f, " -2, --level2 - use postscript level 2 compression (default)\n"); +#ifdef HAVE_ZLIB + fprintf(f, " -3, --level3 - use postscript level 3 compression\n"); +#endif + fprintf(f, " -q, --longcoding - do not optimize for file size\n"); + fprintf(f, "PGM options:\n"); + fprintf(f, " -G, --gamma <n> - gamma value for anti-aliasing (default 2.2)\n"); + fprintf(f, "Frontend options:\n"); + fprintf(f, " -k, --blacklevel <n> - black/white cutoff in input file (default 0.5)\n"); + fprintf(f, " -i, --invert - invert bitmap\n"); + fprintf(f, "Progress bar options:\n"); + fprintf(f, " --progress - show progress bar\n"); + fprintf(f, " --tty <mode> - progress bar rendering: vt100 or dumb\n"); + fprintf(f, "\n"); + fprintf(f, "Dimensions can have optional units, e.g. 6.5in, 15cm, 100pt.\n"); + fprintf(f, "Default is " DEFAULT_DIM_NAME " (or pixels for pgm, dxf, and gimppath backends).\n"); + fprintf(f, "Possible input file formats are: pnm (pbm, pgm, ppm), bmp.\n"); + j = fprintf(f, "Backends are: "); + backend_list(f, j, 78); + fprintf(f, ".\n"); +} + +/* ---------------------------------------------------------------------- */ +/* auxiliary functions for parameter parsing */ + +/* parse a dimension of the kind "1.5in", "7cm", etc. Return result in + postscript points (=1/72 in). If endptr!=NULL, store pointer to + next character in *endptr in the manner of strtod(3). */ +static dim_t parse_dimension(char *s, char **endptr) { + char *p; + dim_t res; + + res.x = strtod(s, &p); + res.d = 0; + if (p!=s) { + if (!strncasecmp(p, "in", 2)) { + res.d = DIM_IN; + p += 2; + } else if (!strncasecmp(p, "cm", 2)) { + res.d = DIM_CM; + p += 2; + } else if (!strncasecmp(p, "mm", 2)) { + res.d = DIM_MM; + p += 2; + } else if (!strncasecmp(p, "pt", 2)) { + res.d = DIM_PT; + p += 2; + } + } + if (endptr!=NULL) { + *endptr = p; + } + return res; +} + +/* parse a pair of dimensions, such as "8.5x11in", "30mmx4cm" */ +static void parse_dimensions(char *s, char **endptr, dim_t *dxp, dim_t *dyp) { + char *p, *q; + dim_t dx, dy; + + dx = parse_dimension(s, &p); + if (p==s) { + goto fail; + } + if (*p != 'x') { + goto fail; + } + p++; + dy = parse_dimension(p, &q); + if (q==p) { + goto fail; + } + if (dx.d && !dy.d) { + dy.d = dx.d; + } else if (!dx.d && dy.d) { + dx.d = dy.d; + } + *dxp = dx; + *dyp = dy; + if (endptr != NULL) { + *endptr = q; + } + return; + + fail: + dx.x = dx.d = dy.x = dy.d = 0; + *dxp = dx; + *dyp = dy; + if (endptr != NULL) { + *endptr = s; + } + return; +} + +static inline double double_of_dim(dim_t d, double def) { + if (d.d) { + return d.x * d.d; + } else { + return d.x * def; + } +} + +static int parse_color(char *s) { + int i, d; + int col = 0; + + if (s[0] != '#' || strlen(s) != 7) { + return -1; + } + for (i=0; i<6; i++) { + d = s[6-i]; + if (d >= '0' && d <= '9') { + col |= (d-'0') << (4*i); + } else if (d >= 'a' && d <= 'f') { + col |= (d-'a'+10) << (4*i); + } else if (d >= 'A' && d <= 'F') { + col |= (d-'A'+10) << (4*i); + } else { + return -1; + } + } + return col; +} + +/* ---------------------------------------------------------------------- */ +/* option processing */ + +/* codes for options that don't have short form */ +enum { + OPT_TIGHT = 300, + OPT_FILLCOLOR, + OPT_OPAQUE, + OPT_GROUP, + OPT_FLAT, + OPT_PROGRESS, + OPT_TTY +}; + +static struct option longopts[] = { + {"help", 0, 0, 'h'}, + {"version", 0, 0, 'v'}, + {"show-defaults", 0, 0, 'V'}, /* undocumented option for compatibility */ + {"license", 0, 0, 'l'}, + {"width", 1, 0, 'W'}, + {"height", 1, 0, 'H'}, + {"resolution", 1, 0, 'r'}, + {"scale", 1, 0, 'x'}, + {"stretch", 1, 0, 'S'}, + {"margin", 1, 0, 'M'}, + {"leftmargin", 1, 0, 'L'}, + {"rightmargin", 1, 0, 'R'}, + {"topmargin", 1, 0, 'T'}, + {"bottommargin", 1, 0, 'B'}, + {"tight", 0, 0, OPT_TIGHT}, + {"rotate", 1, 0, 'A'}, + {"pagesize", 1, 0, 'P'}, + {"turdsize", 1, 0, 't'}, + {"unit", 1, 0, 'u'}, + {"cleartext", 0, 0, 'c'}, + {"level2", 0, 0, '2'}, + {"level3", 0, 0, '3'}, + {"eps", 0, 0, 'e'}, + {"postscript", 0, 0, 'p'}, + {"svg", 0, 0, 's'}, + {"pgm", 0, 0, 'g'}, + {"backend", 1, 0, 'b'}, + {"debug", 1, 0, 'd'}, + {"color", 1, 0, 'C'}, + {"fillcolor", 1, 0, OPT_FILLCOLOR}, + {"turnpolicy", 1, 0, 'z'}, + {"gamma", 1, 0, 'G'}, + {"longcurve", 0, 0, 'n'}, + {"longcoding", 0, 0, 'q'}, + {"alphamax", 1, 0, 'a'}, + {"opttolerance", 1, 0, 'O'}, + {"output", 1, 0, 'o'}, + {"blacklevel", 1, 0, 'k'}, + {"invert", 0, 0, 'i'}, + {"opaque", 0, 0, OPT_OPAQUE}, + {"group", 0, 0, OPT_GROUP}, + {"flat", 0, 0, OPT_FLAT}, + {"progress", 0, 0, OPT_PROGRESS}, + {"tty", 1, 0, OPT_TTY}, + + {0, 0, 0, 0} +}; + +static const char *shortopts = "hvVlW:H:r:x:S:M:L:R:T:B:A:P:t:u:c23epsgb:d:C:z:G:nqa:O:o:k:i"; + +static void dopts(int ac, char *av[]) { + int c; + char *p; + int i, j, r; + dim_t dim, dimx, dimy; + int matches, bestmatch; + + /* defaults */ + backend_lookup("eps", &info.backend); + info.debug = 0; + info.width_d.x = UNDEF; + info.height_d.x = UNDEF; + info.rx = UNDEF; + info.ry = UNDEF; + info.sx = UNDEF; + info.sy = UNDEF; + info.stretch = 1; + info.lmar_d.x = UNDEF; + info.rmar_d.x = UNDEF; + info.tmar_d.x = UNDEF; + info.bmar_d.x = UNDEF; + info.angle = 0; + info.paperwidth = DEFAULT_PAPERWIDTH; + info.paperheight = DEFAULT_PAPERHEIGHT; + info.tight = 0; + info.unit = 10; + info.compress = 1; + info.pslevel = 2; + info.color = 0x000000; + info.gamma = 2.2; + info.param = potrace_param_default(); + if (!info.param) { + fprintf(stderr, "" POTRACE ": %s\n", strerror(errno)); + exit(2); + } + info.longcoding = 0; + info.outfile = NULL; + info.blacklevel = 0.5; + info.invert = 0; + info.opaque = 0; + info.grouping = 1; + info.fillcolor = 0xffffff; + info.progress = 0; + info.progress_bar = DEFAULT_PROGRESS_BAR; + + while ((c = getopt_long(ac, av, shortopts, longopts, NULL)) != -1) { + switch (c) { + case 'h': + fprintf(stdout, "" POTRACE " " VERSION ". Transforms bitmaps into vector graphics.\n\n"); + usage(stdout); + exit(0); + break; + case 'v': + case 'V': + fprintf(stdout, "" POTRACE " " VERSION ". Copyright (C) 2001-2019 Peter Selinger.\n"); + fprintf(stdout, "Library version: %s\n", potrace_version()); + show_defaults(stdout); + exit(0); + break; + case 'l': + fprintf(stdout, "" POTRACE " " VERSION ". Copyright (C) 2001-2019 Peter Selinger.\n\n"); + license(stdout); + exit(0); + break; + case 'W': + info.width_d = parse_dimension(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid dimension -- %s\n", optarg); + exit(1); + } + break; + case 'H': + info.height_d = parse_dimension(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid dimension -- %s\n", optarg); + exit(1); + } + break; + case 'r': + parse_dimensions(optarg, &p, &dimx, &dimy); + if (*p == 0 && dimx.d == 0 && dimy.d == 0 && dimx.x != 0.0 && dimy.x != 0.0) { + info.rx = dimx.x; + info.ry = dimy.x; + break; + } + dim = parse_dimension(optarg, &p); + if (*p == 0 && dim.d == 0 && dim.x != 0.0) { + info.rx = info.ry = dim.x; + break; + } + fprintf(stderr, "" POTRACE ": invalid resolution -- %s\n", optarg); + exit(1); + break; + case 'x': + parse_dimensions(optarg, &p, &dimx, &dimy); + if (*p == 0 && dimx.d == 0 && dimy.d == 0) { + info.sx = dimx.x; + info.sy = dimy.x; + break; + } + dim = parse_dimension(optarg, &p); + if (*p == 0 && dim.d == 0) { + info.sx = info.sy = dim.x; + break; + } + fprintf(stderr, "" POTRACE ": invalid scaling factor -- %s\n", optarg); + exit(1); + break; + case 'S': + info.stretch = atof(optarg); + break; + case 'M': + info.lmar_d = parse_dimension(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid dimension -- %s\n", optarg); + exit(1); + } + info.rmar_d = info.tmar_d = info.bmar_d = info.lmar_d; + break; + case 'L': + info.lmar_d = parse_dimension(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid dimension -- %s\n", optarg); + exit(1); + } + break; + case 'R': + info.rmar_d = parse_dimension(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid dimension -- %s\n", optarg); + exit(1); + } + break; + case 'T': + info.tmar_d = parse_dimension(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid dimension -- %s\n", optarg); + exit(1); + } + break; + case 'B': + info.bmar_d = parse_dimension(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid dimension -- %s\n", optarg); + exit(1); + } + break; + case OPT_TIGHT: + info.tight = 1; + break; + case 'A': + info.angle = strtod(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid angle -- %s\n", optarg); + exit(1); + } + if (info.angle <= -180 || info.angle > 180) { + info.angle -= 360 * ceil(info.angle / 360 - 0.5); + } + break; + case 'P': + matches = 0; + bestmatch = 0; + for (i=0; pageformat[i].name!=NULL; i++) { + if (strcasecmp(pageformat[i].name, optarg)==0) { + matches = 1; + bestmatch = i; + break; + } else if (strncasecmp(pageformat[i].name, optarg, strlen(optarg))==0) { + /* don't allow partial match on "10x14" */ + if (optarg[0] != '1') { + matches++; + bestmatch = i; + } + } + } + if (matches == 1) { + info.paperwidth = pageformat[bestmatch].w; + info.paperheight = pageformat[bestmatch].h; + break; + } + parse_dimensions(optarg, &p, &dimx, &dimy); + if (*p == 0) { + info.paperwidth = (int)round(double_of_dim(dimx, DEFAULT_DIM)); + info.paperheight = (int)round(double_of_dim(dimy, DEFAULT_DIM)); + break; + } + if (matches == 0) { + fprintf(stderr, "" POTRACE ": unrecognized page format -- %s\n", optarg); + } else { + fprintf(stderr, "" POTRACE ": ambiguous page format -- %s\n", optarg); + } + j = fprintf(stderr, "Use one of: "); + for (i=0; pageformat[i].name!=NULL; i++) { + if (j + strlen(pageformat[i].name) > 75) { + fprintf(stderr, "\n"); + j = 0; + } + j += fprintf(stderr, "%s, ", pageformat[i].name); + } + fprintf(stderr, "or specify <dim>x<dim>.\n"); + exit(1); + break; + case 't': + info.param->turdsize = atoi(optarg); + break; + case 'u': + info.unit = strtod(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid unit -- %s\n", optarg); + exit(1); + } + break; + case 'c': + info.pslevel = 2; + info.compress = 0; + break; + case '2': + info.pslevel = 2; + info.compress = 1; + break; + case '3': +#ifdef HAVE_ZLIB + info.pslevel = 3; + info.compress = 1; +#else + fprintf(stderr, "" POTRACE ": option -3 not supported, using -2 instead.\n"); + fflush(stderr); + info.pslevel = 2; + info.compress = 1; +#endif + break; + case 'e': + backend_lookup("eps", &info.backend); + break; + case 'p': + backend_lookup("postscript", &info.backend); + break; + case 's': + backend_lookup("svg", &info.backend); + break; + case 'g': + backend_lookup("pgm", &info.backend); + break; + case 'b': + r = backend_lookup(optarg, &info.backend); + if (r==1 || r==2) { + if (r==1) { + fprintf(stderr, "" POTRACE ": unrecognized backend -- %s\n", optarg); + } else { + fprintf(stderr, "" POTRACE ": ambiguous backend -- %s\n", optarg); + } + j = fprintf(stderr, "Use one of: "); + backend_list(stderr, j, 70); + fprintf(stderr, ".\n"); + exit(1); + } + break; + case 'd': + info.debug = atoi(optarg); + break; + case 'C': + info.color = parse_color(optarg); + if (info.color == -1) { + fprintf(stderr, "" POTRACE ": invalid color -- %s\n", optarg); + exit(1); + } + break; + case OPT_FILLCOLOR: + info.fillcolor = parse_color(optarg); + if (info.fillcolor == -1) { + fprintf(stderr, "" POTRACE ": invalid color -- %s\n", optarg); + exit(1); + } + info.opaque = 1; + break; + case 'z': + matches = 0; + bestmatch = 0; + for (i=0; turnpolicy[i].name!=NULL; i++) { + if (strcasecmp(turnpolicy[i].name, optarg)==0) { + matches = 1; + bestmatch = i; + break; + } else if (strncasecmp(turnpolicy[i].name, optarg, strlen(optarg))==0) { + matches++; + bestmatch = i; + } + } + if (matches == 1) { + info.param->turnpolicy = turnpolicy[bestmatch].n; + break; + } + if (matches == 0) { + fprintf(stderr, "" POTRACE ": unrecognized turnpolicy -- %s\n", optarg); + } else { + fprintf(stderr, "" POTRACE ": ambiguous turnpolicy -- %s\n", optarg); + } + j = fprintf(stderr, "Use one of: "); + for (i=0; turnpolicy[i].name!=NULL; i++) { + if (j + strlen(turnpolicy[i].name) > 75) { + fprintf(stderr, "\n"); + j = 0; + } + j += fprintf(stderr, "%s%s", turnpolicy[i].name, turnpolicy[i+1].name ? ", " : ""); + } + fprintf(stderr, ".\n"); + exit(1); + break; + case 'G': + info.gamma = atof(optarg); + break; + case 'n': + info.param->opticurve = 0; + break; + case 'q': + info.longcoding = 1; + break; + case 'a': + info.param->alphamax = strtod(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid alphamax -- %s\n", optarg); + exit(1); + } + break; + case 'O': + info.param->opttolerance = strtod(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid opttolerance -- %s\n", optarg); + exit(1); + } + break; + case 'o': + free(info.outfile); + info.outfile = strdup(optarg); + if (!info.outfile) { + fprintf(stderr, "" POTRACE ": %s\n", strerror(errno)); + exit(2); + } + break; + case 'k': + info.blacklevel = strtod(optarg, &p); + if (*p) { + fprintf(stderr, "" POTRACE ": invalid blacklevel -- %s\n", optarg); + exit(1); + } + break; + case 'i': + info.invert = 1; + break; + case OPT_OPAQUE: + info.opaque = 1; + break; + case OPT_GROUP: + info.grouping = 2; + break; + case OPT_FLAT: + info.grouping = 0; + break; + case OPT_PROGRESS: + info.progress = 1; + break; + case OPT_TTY: + if (strcmp(optarg, "dumb") == 0) { + info.progress_bar = progress_bar_simplified; + } else if (strcmp(optarg, "vt100") == 0) { + info.progress_bar = progress_bar_vt100; + } else { + fprintf(stderr, "" POTRACE ": invalid tty mode -- %s. Try --help for more info\n", optarg); + exit(1); + } + break; + case '?': + fprintf(stderr, "Try --help for more info\n"); + exit(1); + break; + default: + fprintf(stderr, "" POTRACE ": Unimplemented option -- %c\n", c); + exit(1); + } + } + info.infiles = &av[optind]; + info.infilecount = ac-optind; + info.some_infiles = info.infilecount ? 1 : 0; + + /* if "--" was used, even an empty list of filenames is considered + "some" filenames. */ + if (strcmp(av[optind-1], "--") == 0) { + info.some_infiles = 1; + } +} + +/* ---------------------------------------------------------------------- */ +/* calculations with bitmap dimensions, positioning etc */ + +/* determine the dimensions of the output based on command line and + image dimensions, and optionally, based on the actual image outline. */ +static void calc_dimensions(imginfo_t *imginfo, potrace_path_t *plist) { + double dim_def; + double maxwidth, maxheight, sc; + int default_scaling = 0; + + /* we take care of a special case: if one of the image dimensions is + 0, we change it to 1. Such an image is empty anyway, so there + will be 0 paths in it. Changing the dimensions avoids division by + 0 error in calculating scaling factors, bounding boxes and + such. This doesn't quite do the right thing in all cases, but it + is better than causing overflow errors or "nan" output in + backends. Human users don't tend to process images of size 0 + anyway; they might occur in some pipelines. */ + if (imginfo->pixwidth == 0) { + imginfo->pixwidth = 1; + } + if (imginfo->pixheight == 0) { + imginfo->pixheight = 1; + } + + /* set the default dimension for width, height, margins */ + if (info.backend->pixel) { + dim_def = DIM_PT; + } else { + dim_def = DEFAULT_DIM; + } + + /* apply default dimension to width, height, margins */ + imginfo->width = info.width_d.x == UNDEF ? UNDEF : double_of_dim(info.width_d, dim_def); + imginfo->height = info.height_d.x == UNDEF ? UNDEF : double_of_dim(info.height_d, dim_def); + imginfo->lmar = info.lmar_d.x == UNDEF ? UNDEF : double_of_dim(info.lmar_d, dim_def); + imginfo->rmar = info.rmar_d.x == UNDEF ? UNDEF : double_of_dim(info.rmar_d, dim_def); + imginfo->tmar = info.tmar_d.x == UNDEF ? UNDEF : double_of_dim(info.tmar_d, dim_def); + imginfo->bmar = info.bmar_d.x == UNDEF ? UNDEF : double_of_dim(info.bmar_d, dim_def); + + /* start with a standard rectangle */ + trans_from_rect(&imginfo->trans, imginfo->pixwidth, imginfo->pixheight); + + /* if info.tight is set, tighten the bounding box */ + if (info.tight) { + trans_tighten(&imginfo->trans, plist); + } + + /* sx/rx is just an alternate way to specify width; sy/ry is just an + alternate way to specify height. */ + if (info.backend->pixel) { + if (imginfo->width == UNDEF && info.sx != UNDEF) { + imginfo->width = imginfo->trans.bb[0] * info.sx; + } + if (imginfo->height == UNDEF && info.sy != UNDEF) { + imginfo->height = imginfo->trans.bb[1] * info.sy; + } + } else { + if (imginfo->width == UNDEF && info.rx != UNDEF) { + imginfo->width = imginfo->trans.bb[0] / info.rx * 72; + } + if (imginfo->height == UNDEF && info.ry != UNDEF) { + imginfo->height = imginfo->trans.bb[1] / info.ry * 72; + } + } + + /* if one of width/height is specified, use stretch to determine the + other */ + if (imginfo->width == UNDEF && imginfo->height != UNDEF) { + imginfo->width = imginfo->height / imginfo->trans.bb[1] * imginfo->trans.bb[0] / info.stretch; + } else if (imginfo->width != UNDEF && imginfo->height == UNDEF) { + imginfo->height = imginfo->width / imginfo->trans.bb[0] * imginfo->trans.bb[1] * info.stretch; + } + + /* if width and height are still variable, tenatively use the + default scaling factor of 72dpi (for dimension-based backends) or + 1 (for pixel-based backends). For fixed-size backends, this will + be adjusted later to fit the page. */ + if (imginfo->width == UNDEF && imginfo->height == UNDEF) { + imginfo->width = imginfo->trans.bb[0]; + imginfo->height = imginfo->trans.bb[1] * info.stretch; + default_scaling = 1; + } + + /* apply scaling */ + trans_scale_to_size(&imginfo->trans, imginfo->width, imginfo->height); + + /* apply rotation, and tighten the bounding box again, if necessary */ + if (info.angle != 0.0) { + trans_rotate(&imginfo->trans, info.angle); + if (info.tight) { + trans_tighten(&imginfo->trans, plist); + } + } + + /* for fixed-size backends, if default scaling was in effect, + further adjust the scaling to be the "best fit" for the given + page size and margins. */ + if (default_scaling && info.backend->fixed) { + + /* try to squeeze it between margins */ + maxwidth = UNDEF; + maxheight = UNDEF; + + if (imginfo->lmar != UNDEF && imginfo->rmar != UNDEF) { + maxwidth = info.paperwidth - imginfo->lmar - imginfo->rmar; + } + if (imginfo->bmar != UNDEF && imginfo->tmar != UNDEF) { + maxheight = info.paperheight - imginfo->bmar - imginfo->tmar; + } + if (maxwidth == UNDEF && maxheight == UNDEF) { + maxwidth = max(info.paperwidth - 144, info.paperwidth * 0.75); + maxheight = max(info.paperheight - 144, info.paperheight * 0.75); + } + + if (maxwidth == UNDEF) { + sc = maxheight / imginfo->trans.bb[1]; + } else if (maxheight == UNDEF) { + sc = maxwidth / imginfo->trans.bb[0]; + } else { + sc = min(maxwidth / imginfo->trans.bb[0], maxheight / imginfo->trans.bb[1]); + } + + /* re-scale coordinate system */ + imginfo->width *= sc; + imginfo->height *= sc; + trans_rescale(&imginfo->trans, sc); + } + + /* adjust margins */ + if (info.backend->fixed) { + if (imginfo->lmar == UNDEF && imginfo->rmar == UNDEF) { + imginfo->lmar = (info.paperwidth-imginfo->trans.bb[0])/2; + } else if (imginfo->lmar == UNDEF) { + imginfo->lmar = (info.paperwidth-imginfo->trans.bb[0]-imginfo->rmar); + } else if (imginfo->lmar != UNDEF && imginfo->rmar != UNDEF) { + imginfo->lmar += (info.paperwidth-imginfo->trans.bb[0]-imginfo->lmar-imginfo->rmar)/2; + } + if (imginfo->bmar == UNDEF && imginfo->tmar == UNDEF) { + imginfo->bmar = (info.paperheight-imginfo->trans.bb[1])/2; + } else if (imginfo->bmar == UNDEF) { + imginfo->bmar = (info.paperheight-imginfo->trans.bb[1]-imginfo->tmar); + } else if (imginfo->bmar != UNDEF && imginfo->tmar != UNDEF) { + imginfo->bmar += (info.paperheight-imginfo->trans.bb[1]-imginfo->bmar-imginfo->tmar)/2; + } + } else { + if (imginfo->lmar == UNDEF) { + imginfo->lmar = 0; + } + if (imginfo->rmar == UNDEF) { + imginfo->rmar = 0; + } + if (imginfo->bmar == UNDEF) { + imginfo->bmar = 0; + } + if (imginfo->tmar == UNDEF) { + imginfo->tmar = 0; + } + } +} + +/* ---------------------------------------------------------------------- */ +/* auxiliary functions for file handling */ + +/* open a file for reading. Return stdin if filename is NULL or "-" */ +static FILE *my_fopen_read(const char *filename) { + if (filename == NULL || strcmp(filename, "-") == 0) { + return stdin; + } + return fopen(filename, "rb"); +} + +/* open a file for writing. Return stdout if filename is NULL or "-" */ +static FILE *my_fopen_write(const char *filename) { + if (filename == NULL || strcmp(filename, "-") == 0) { + return stdout; + } + return fopen(filename, "wb"); +} + +/* close a file, but do nothing is filename is NULL or "-" */ +static void my_fclose(FILE *f, const char *filename) { + if (filename == NULL || strcmp(filename, "-") == 0) { + return; + } + fclose(f); +} + +/* make output filename from input filename. Return an allocated value. */ +static char *make_outfilename(const char *infile, const char *ext) { + char *outfile; + char *p; + + if (strcmp(infile, "-") == 0) { + return strdup("-"); + } + + outfile = (char *) malloc(strlen(infile)+strlen(ext)+5); + if (!outfile) { + return NULL; + } + strcpy(outfile, infile); + p = strrchr(outfile, '.'); + if (p) { + *p = 0; + } + strcat(outfile, ext); + + /* check that input and output filenames are different */ + if (strcmp(infile, outfile) == 0) { + strcpy(outfile, infile); + strcat(outfile, "-out"); + } + + return outfile; +} + +/* ---------------------------------------------------------------------- */ +/* Process one infile */ + +/* Process one or more bitmaps from fin, and write the results to fout + using the page_f function of the appropriate backend. */ + +static void process_file(backend_t *b, const char *infile, const char *outfile, FILE *fin, FILE *fout) { + int r; + potrace_bitmap_t *bm = NULL; + imginfo_t imginfo; + int eof_flag = 0; /* to indicate premature eof */ + int count; /* number of bitmaps successfully processed, this file */ + potrace_state_t *st; + + for (count=0; ; count++) { + /* read a bitmap */ + r = bm_read(fin, info.blacklevel, &bm); + switch (r) { + case -1: /* system error */ + fprintf(stderr, "" POTRACE ": %s: %s\n", infile, strerror(errno)); + exit(2); + case -2: /* corrupt file format */ + fprintf(stderr, "" POTRACE ": %s: file format error: %s\n", infile, bm_read_error); + exit(2); + case -3: /* empty file */ + if (count>0) { /* end of file */ + return; + } + fprintf(stderr, "" POTRACE ": %s: empty file\n", infile); + exit(2); + case -4: /* wrong magic */ + if (count>0) { + fprintf(stderr, "" POTRACE ": %s: warning: junk at end of file\n", infile); + return; + } + fprintf(stderr, "" POTRACE ": %s: file format not recognized\n", infile); + fprintf(stderr, "Possible input file formats are: pnm (pbm, pgm, ppm), bmp.\n"); + exit(2); + case 1: /* unexpected end of file */ + fprintf(stderr, "" POTRACE ": warning: %s: premature end of file\n", infile); + eof_flag = 1; + break; + } + + /* prepare progress bar, if requested */ + if (info.progress) { + r = info.progress_bar->init(&info.param->progress, infile, count); + if (r) { + fprintf(stderr, "" POTRACE ": %s\n", strerror(errno)); + exit(2); + } + } else { + info.param->progress.callback = NULL; + } + + if (info.invert) { + bm_invert(bm); + } + + /* process the image */ + st = potrace_trace(info.param, bm); + if (!st || st->status != POTRACE_STATUS_OK) { + fprintf(stderr, "" POTRACE ": %s: %s\n", infile, strerror(errno)); + exit(2); + } + + /* calculate image dimensions */ + imginfo.pixwidth = bm->w; + imginfo.pixheight = bm->h; + bm_free(bm); + + calc_dimensions(&imginfo, st->plist); + + r = b->page_f(fout, st->plist, &imginfo); + if (r) { + fprintf(stderr, "" POTRACE ": %s: %s\n", outfile, strerror(errno)); + exit(2); + } + + potrace_state_free(st); + + if (info.progress) { + info.progress_bar->term(&info.param->progress); + } + + if (eof_flag || !b->multi) { + return; + } + } + /* not reached */ +} + +/* ---------------------------------------------------------------------- */ +/* main: handle file i/o */ + +#define TRY(x) if (x) goto try_error + +int main(int ac, char *av[]) { + backend_t *b; /* backend info */ + FILE *fin, *fout; + int i; + char *outfile; + + /* platform-specific initializations, e.g., set file i/o to binary */ + platform_init(); + + /* process options */ + dopts(ac, av); + + b = info.backend; + if (b==NULL) { + fprintf(stderr, "" POTRACE ": internal error: selected backend not found\n"); + exit(1); + } + + /* fix some parameters */ + /* if backend cannot handle opticurve, disable it */ + if (b->opticurve == 0) { + info.param->opticurve = 0; + } + + /* there are several ways to call us: + potrace -- stdin to stdout + potrace -o outfile -- stdin to outfile + potrace file... -- encode each file and generate outfile names + potrace -o outfile file... -- concatenate files and write to outfile + + The latter form is only allowed one file for single-page + backends. For multi-page backends, each file must contain 0 or + more complete bitmaps. + */ + + if (!info.some_infiles) { /* read from stdin */ + + fout = my_fopen_write(info.outfile); + if (!fout) { + fprintf(stderr, "" POTRACE ": %s: %s\n", info.outfile ? info.outfile : "stdout", strerror(errno)); + exit(2); + } + if (b->init_f) { + TRY(b->init_f(fout)); + } + process_file(b, "stdin", info.outfile ? info.outfile : "stdout", stdin, fout); + if (b->term_f) { + TRY(b->term_f(fout)); + } + my_fclose(fout, info.outfile); + free(info.outfile); + potrace_param_free(info.param); + return 0; + + } else if (!info.outfile) { /* infiles -> multiple outfiles */ + + for (i=0; i<info.infilecount; i++) { + outfile = make_outfilename(info.infiles[i], b->ext); + if (!outfile) { + fprintf(stderr, "" POTRACE ": %s\n", strerror(errno)); + exit(2); + } + fin = my_fopen_read(info.infiles[i]); + if (!fin) { + fprintf(stderr, "" POTRACE ": %s: %s\n", info.infiles[i], strerror(errno)); + exit(2); + } + fout = my_fopen_write(outfile); + if (!fout) { + fprintf(stderr, "" POTRACE ": %s: %s\n", outfile, strerror(errno)); + exit(2); + } + if (b->init_f) { + TRY(b->init_f(fout)); + } + process_file(b, info.infiles[i], outfile, fin, fout); + if (b->term_f) { + TRY(b->term_f(fout)); + } + my_fclose(fin, info.infiles[i]); + my_fclose(fout, outfile); + free(outfile); + } + potrace_param_free(info.param); + return 0; + + } else { /* infiles to single outfile */ + + if (!b->multi && info.infilecount >= 2) { + fprintf(stderr, "" POTRACE ": cannot use multiple input files with -o in %s mode\n", b->name); + exit(1); + } + if (info.infilecount == 0) { + fprintf(stderr, "" POTRACE ": cannot use empty list of input files with -o\n"); + exit(1); + } + + fout = my_fopen_write(info.outfile); + if (!fout) { + fprintf(stderr, "" POTRACE ": %s: %s\n", info.outfile, strerror(errno)); + exit(2); + } + if (b->init_f) { + TRY(b->init_f(fout)); + } + for (i=0; i<info.infilecount; i++) { + fin = my_fopen_read(info.infiles[i]); + if (!fin) { + fprintf(stderr, "" POTRACE ": %s: %s\n", info.infiles[i], strerror(errno)); + exit(2); + } + process_file(b, info.infiles[i], info.outfile, fin, fout); + my_fclose(fin, info.infiles[i]); + } + if (b->term_f) { + TRY(b->term_f(fout)); + } + my_fclose(fout, info.outfile); + free(info.outfile); + potrace_param_free(info.param); + return 0; + + } + + /* not reached */ + + try_error: + fprintf(stderr, "" POTRACE ": %s\n", strerror(errno)); + exit(2); +} diff --git a/Build/source/libs/potrace/potrace-src/src/main.h b/Build/source/libs/potrace/potrace-src/src/main.h new file mode 100644 index 00000000000..b7f6805ce4d --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/main.h @@ -0,0 +1,109 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef MAIN_H +#define MAIN_H + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "potracelib.h" +#include "progress_bar.h" +#include "auxiliary.h" +#include "trans.h" + +/* structure to hold a dimensioned value */ +struct dim_s { + double x; /* value */ + double d; /* dimension (in pt), or 0 if not given */ +}; +typedef struct dim_s dim_t; + +#define DIM_IN (72) +#define DIM_CM (72 / 2.54) +#define DIM_MM (72 / 25.4) +#define DIM_PT (1) + +/* set some configurable defaults */ + +#ifdef USE_METRIC +#define DEFAULT_DIM DIM_CM +#define DEFAULT_DIM_NAME "centimeters" +#else +#define DEFAULT_DIM DIM_IN +#define DEFAULT_DIM_NAME "inches" +#endif + +#ifdef USE_A4 +#define DEFAULT_PAPERWIDTH 595 +#define DEFAULT_PAPERHEIGHT 842 +#define DEFAULT_PAPERFORMAT "a4" +#else +#define DEFAULT_PAPERWIDTH 612 +#define DEFAULT_PAPERHEIGHT 792 +#define DEFAULT_PAPERFORMAT "letter" +#endif + +#ifdef DUMB_TTY +#define DEFAULT_PROGRESS_BAR progress_bar_simplified +#else +#define DEFAULT_PROGRESS_BAR progress_bar_vt100 +#endif + + + +struct backend_s; + +/* structure to hold command line options */ +struct info_s { + struct backend_s *backend; /* type of backend (eps,ps,pgm etc) */ + potrace_param_t *param; /* tracing parameters, see potracelib.h */ + int debug; /* type of output (0-2) (for BACKEND_PS/EPS only) */ + dim_t width_d; /* desired width of image */ + dim_t height_d; /* desired height of image */ + double rx; /* desired x resolution (in dpi) */ + double ry; /* desired y resolution (in dpi) */ + double sx; /* desired x scaling factor */ + double sy; /* desired y scaling factor */ + double stretch; /* ry/rx, if not otherwise determined */ + dim_t lmar_d, rmar_d, tmar_d, bmar_d; /* margins */ + double angle; /* rotate by this many degrees */ + int paperwidth, paperheight; /* paper size for ps backend (in pt) */ + int tight; /* should bounding box follow actual vector outline? */ + double unit; /* granularity of output grid */ + int compress; /* apply compression? */ + int pslevel; /* postscript level to use: affects only compression */ + int color; /* rgb color code 0xrrggbb: line color */ + int fillcolor; /* rgb color code 0xrrggbb: fill color */ + double gamma; /* gamma value for pgm backend */ + int longcoding; /* do not optimize for file size? */ + char *outfile; /* output filename, if given */ + char **infiles; /* array of input filenames */ + int infilecount; /* number of input filenames */ + int some_infiles; /* do we process a list of input filenames? */ + double blacklevel; /* 0 to 1: black/white cutoff in input file */ + int invert; /* invert bitmap? */ + int opaque; /* paint white shapes opaquely? */ + int grouping; /* 0=flat; 1=connected components; 2=hierarchical */ + int progress; /* should we display a progress bar? */ + progress_bar_t *progress_bar; /* which progress bar to use */ +}; +typedef struct info_s info_t; + +extern info_t info; + +/* structure to hold per-image information, set e.g. by calc_dimensions */ +struct imginfo_s { + int pixwidth; /* width of input pixmap */ + int pixheight; /* height of input pixmap */ + double width; /* desired width of image (in pt or pixels) */ + double height; /* desired height of image (in pt or pixels) */ + double lmar, rmar, tmar, bmar; /* requested margins (in pt) */ + trans_t trans; /* specify relative position of a tilted rectangle */ +}; +typedef struct imginfo_s imginfo_t; + +#endif /* MAIN_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/mkbitmap.c b/Build/source/libs/potrace/potrace-src/src/mkbitmap.c new file mode 100644 index 00000000000..9b302c45a40 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/mkbitmap.c @@ -0,0 +1,794 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* mkbitmap.c: a standalone program for converting greymaps to bitmaps + while optionally applying the following enhancements: highpass + filter (evening out background gradients), lowpass filter + (smoothing foreground details), interpolated scaling, inversion. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <errno.h> +#include <string.h> +#include <stdlib.h> +#include <math.h> +#include <getopt.h> + +#include "greymap.h" +#include "bitmap_io.h" +#include "platform.h" + +#define SAFE_CALLOC(var, n, typ) \ + if ((var = (typ *)calloc(n, sizeof(typ))) == NULL) goto calloc_error + +/* structure to hold command line options */ +struct info_s { + char *outfile; /* output file */ + char **infiles; /* input files */ + int infilecount; /* how many input files? */ + int invert; /* invert input? */ + int highpass; /* use highpass filter? */ + double lambda; /* highpass filter radius */ + int lowpass; /* use lowpass filter? */ + double lambda1; /* lowpass filter radius */ + int scale; /* scaling factor */ + int linear; /* linear scaling? */ + int bilevel; /* convert to bilevel? */ + double level; /* cutoff grey level */ + const char *outext; /* default output file extension */ +}; +typedef struct info_s info_t; + +static info_t info; + +/* apply lowpass filter (an approximate Gaussian blur) to greymap. + Lambda is the standard deviation of the kernel of the filter (i.e., + the approximate filter radius). */ +static void lowpass(greymap_t *gm, double lambda) { + double f, g; + double c, d; + double B; + int x, y; + + if (gm->h == 0 || gm->w == 0) { + return; + } + + /* calculate filter coefficients from given lambda */ + B = 1+2/(lambda*lambda); + c = B-sqrt(B*B-1); + d = 1-c; + + for (y=0; y<gm->h; y++) { + /* apply low-pass filter to row y */ + /* left-to-right */ + f = g = 0; + for (x=0; x<gm->w; x++) { + f = f*c + GM_UGET(gm, x, y)*d; + g = g*c + f*d; + GM_UPUT(gm, x, y, g); + } + + /* right-to-left */ + for (x=gm->w-1; x>=0; x--) { + f = f*c + GM_UGET(gm, x, y)*d; + g = g*c + f*d; + GM_UPUT(gm, x, y, g); + } + + /* left-to-right mop-up */ + for (x=0; x<gm->w; x++) { + f = f*c; + g = g*c + f*d; + if (f+g < 1/255.0) { + break; + } + GM_UPUT(gm, x, y, GM_UGET(gm, x, y)+g); + } + } + + for (x=0; x<gm->w; x++) { + /* apply low-pass filter to column x */ + /* bottom-to-top */ + f = g = 0; + for (y=0; y<gm->h; y++) { + f = f*c + GM_UGET(gm, x, y)*d; + g = g*c + f*d; + GM_UPUT(gm, x, y, g); + } + + /* top-to-bottom */ + for (y=gm->h-1; y>=0; y--) { + f = f*c + GM_UGET(gm, x, y)*d; + g = g*c + f*d; + GM_UPUT(gm, x, y, g); + } + + /* bottom-to-top mop-up */ + for (y=0; y<gm->h; y++) { + f = f*c; + g = g*c + f*d; + if (f+g < 1/255.0) { + break; + } + GM_UPUT(gm, x, y, GM_UGET(gm, x, y)+g); + } + } +} + +/* apply highpass filter to greymap. Return 0 on success, 1 on error + with errno set. */ +static int highpass(greymap_t *gm, double lambda) { + greymap_t *gm1; + double f; + int x, y; + + if (gm->h == 0 || gm->w == 0) { + return 0; + } + + /* create a copy */ + gm1 = gm_dup(gm); + if (!gm1) { + return 1; + } + + /* apply lowpass filter to the copy */ + lowpass(gm1, lambda); + + /* subtract copy from original */ + for (y=0; y<gm->h; y++) { + for (x=0; x<gm->w; x++) { + f = GM_UGET(gm, x, y); + f -= GM_UGET(gm1, x, y); + f += 128; /* normalize! */ + GM_UPUT(gm, x, y, f); + } + } + gm_free(gm1); + return 0; +} + +/* Convert greymap to bitmap by using cutoff threshold c (0=black, + 1=white). On error, return NULL with errno set. */ +static potrace_bitmap_t *threshold(greymap_t *gm, double c) { + int w, h; + potrace_bitmap_t *bm_out = NULL; + double c1; + int x, y; + double p; + + w = gm->w; + h = gm->h; + + /* allocate output bitmap */ + bm_out = bm_new(w, h); + if (!bm_out) { + return NULL; + } + + /* thresholding */ + c1 = c * 255; + + for (y=0; y<h; y++) { + for (x=0; x<w; x++) { + p = GM_UGET(gm, x, y); + BM_UPUT(bm_out, x, y, p < c1); + } + } + return bm_out; +} + +/* scale greymap by factor s, using linear interpolation. If + bilevel=0, return a pointer to a greymap_t. If bilevel=1, return a + pointer to a potrace_bitmap_t and use cutoff threshold c (0=black, + 1=white). On error, return NULL with errno set. */ + +static void *interpolate_linear(greymap_t *gm, int s, int bilevel, double c) { + int p00, p01, p10, p11; + int i, j, x, y; + double xx, yy, av; + double c1 = 0; + int w, h; + double p0, p1; + greymap_t *gm_out = NULL; + potrace_bitmap_t *bm_out = NULL; + + w = gm->w; + h = gm->h; + + /* allocate output bitmap/greymap */ + if (bilevel) { + bm_out = bm_new(w*s, h*s); + if (!bm_out) { + return NULL; + } + c1 = c * 255; + } else { + gm_out = gm_new(w*s, h*s); + if (!gm_out) { + return NULL; + } + } + + /* interpolate */ + for (i=0; i<w; i++) { + for (j=0; j<h; j++) { + p00 = GM_BGET(gm, i, j); + p01 = GM_BGET(gm, i, j+1); + p10 = GM_BGET(gm, i+1, j); + p11 = GM_BGET(gm, i+1, j+1); + + if (bilevel) { + /* treat two special cases which are very common */ + if (p00 < c1 && p01 < c1 && p10 < c1 && p11 < c1) { + for (x=0; x<s; x++) { + for (y=0; y<s; y++) { + BM_UPUT(bm_out, i*s+x, j*s+y, 1); + } + } + continue; + } + if (p00 >= c1 && p01 >= c1 && p10 >= c1 && p11 >= c1) { + continue; + } + } + + /* the general case */ + for (x=0; x<s; x++) { + xx = x/(double)s; + p0 = p00*(1-xx) + p10*xx; + p1 = p01*(1-xx) + p11*xx; + for (y=0; y<s; y++) { + yy = y/(double)s; + av = p0*(1-yy) + p1*yy; + if (bilevel) { + BM_UPUT(bm_out, i*s+x, j*s+y, av < c1); + } else { + GM_UPUT(gm_out, i*s+x, j*s+y, av); + } + } + } + } + } + if (bilevel) { + return (void *)bm_out; + } else { + return (void *)gm_out; + } +} + +/* same as interpolate_linear, except use cubic interpolation (slower + and better). */ + +/* we need this typedef so that the SAFE_CALLOC macro will work */ +typedef double double4[4]; + +static void *interpolate_cubic(greymap_t *gm, int s, int bilevel, double c) { + int w, h; + double4 *poly = NULL; /* poly[s][4]: fixed interpolation polynomials */ + double p[4]; /* four current points */ + double4 *window = NULL; /* window[s][4]: current state */ + double t, v; + int k, l, i, j, x, y; + double c1 = 0; + greymap_t *gm_out = NULL; + potrace_bitmap_t *bm_out = NULL; + + SAFE_CALLOC(poly, s, double4); + SAFE_CALLOC(window, s, double4); + + w = gm->w; + h = gm->h; + + /* allocate output bitmap/greymap */ + if (bilevel) { + bm_out = bm_new(w*s, h*s); + if (!bm_out) { + goto calloc_error; + } + c1 = c * 255; + } else { + gm_out = gm_new(w*s, h*s); + if (!gm_out) { + goto calloc_error; + } + } + + /* pre-calculate interpolation polynomials */ + for (k=0; k<s; k++) { + t = k/(double)s; + poly[k][0] = 0.5 * t * (t-1) * (1-t); + poly[k][1] = -(t+1) * (t-1) * (1-t) + 0.5 * (t-1) * (t-2) * t; + poly[k][2] = 0.5 * (t+1) * t * (1-t) - t * (t-2) * t; + poly[k][3] = 0.5 * t * (t-1) * t; + } + + /* interpolate */ + for (y=0; y<h; y++) { + x=0; + for (i=0; i<4; i++) { + for (j=0; j<4; j++) { + p[j] = GM_BGET(gm, x+i-1, y+j-1); + } + for (k=0; k<s; k++) { + window[k][i] = 0.0; + for (j=0; j<4; j++) { + window[k][i] += poly[k][j] * p[j]; + } + } + } + while (1) { + for (l=0; l<s; l++) { + for (k=0; k<s; k++) { + v = 0.0; + for (i=0; i<4; i++) { + v += window[k][i] * poly[l][i]; + } + if (bilevel) { + BM_PUT(bm_out, x*s+l, y*s+k, v < c1); + } else { + GM_PUT(gm_out, x*s+l, y*s+k, v); + } + } + } + x++; + if (x>=w) { + break; + } + for (i=0; i<3; i++) { + for (k=0; k<s; k++) { + window[k][i] = window[k][i+1]; + } + } + i=3; + for (j=0; j<4; j++) { + p[j] = GM_BGET(gm, x+i-1, y+j-1); + } + for (k=0; k<s; k++) { + window[k][i] = 0.0; + for (j=0; j<4; j++) { + window[k][i] += poly[k][j] * p[j]; + } + } + } + } + + free(poly); + free(window); + + if (bilevel) { + return (void *)bm_out; + } else { + return (void *)gm_out; + } + + calloc_error: + free(poly); + free(window); + return NULL; +} + +/* ---------------------------------------------------------------------- */ + +/* process a single file, containing one or more images. On error, + print error message to stderr and exit with code 2. On warning, + print warning message to stderr. */ + +static void process_file(FILE *fin, FILE *fout, const char *infile, const char *outfile) { + int r; + greymap_t *gm; + potrace_bitmap_t *bm; + void *sm; + int x, y; + int count; + + for (count=0; ; count++) { + r = gm_read(fin, &gm); + switch (r) { + case -1: /* system error */ + fprintf(stderr, "" MKBITMAP ": %s: %s\n", infile, strerror(errno)); + exit(2); + case -2: /* corrupt file format */ + fprintf(stderr, "" MKBITMAP ": %s: file format error: %s\n", infile, gm_read_error); + exit(2); + case -3: /* empty file */ + if (count>0) { /* end of file */ + return; + } + fprintf(stderr, "" MKBITMAP ": %s: empty file\n", infile); + exit(2); + case -4: /* wrong magic */ + if (count>0) { + fprintf(stderr, "" MKBITMAP ": %s: warning: junk at end of file\n", infile); + return; + } + fprintf(stderr, "" MKBITMAP ": %s: file format not recognized\n", infile); + fprintf(stderr, "Possible input file formats are: pnm (pbm, pgm, ppm), bmp.\n"); + exit(2); + case 1: /* unexpected end of file */ + fprintf(stderr, "" MKBITMAP ": %s: warning: premature end of file\n", infile); + break; + } + + if (info.invert) { + for (y=0; y<gm->h; y++) { + for (x=0; x<gm->w; x++) { + GM_UPUT(gm, x, y, 255-GM_UGET(gm, x, y)); + } + } + } + + if (info.highpass) { + r = highpass(gm, info.lambda); + if (r) { + fprintf(stderr, "" MKBITMAP ": %s: %s\n", infile, strerror(errno)); + exit(2); + } + } + + if (info.lowpass) { + lowpass(gm, info.lambda1); + } + + if (info.scale == 1 && info.bilevel) { /* no interpolation necessary */ + sm = threshold(gm, info.level); + gm_free(gm); + } else if (info.scale == 1) { + sm = gm; + } else if (info.linear) { /* linear interpolation */ + sm = interpolate_linear(gm, info.scale, info.bilevel, info.level); + gm_free(gm); + } else { /* cubic interpolation */ + sm = interpolate_cubic(gm, info.scale, info.bilevel, info.level); + gm_free(gm); + } + if (!sm) { + fprintf(stderr, "" MKBITMAP ": %s: %s\n", infile, strerror(errno)); + exit(2); + } + + if (info.bilevel) { + bm = (potrace_bitmap_t *)sm; + bm_writepbm(fout, bm); + bm_free(bm); + } else { + gm = (greymap_t *)sm; + gm_writepgm(fout, gm, NULL, 1, GM_MODE_POSITIVE, 1.0); + gm_free(gm); + } + } +} + +/* ---------------------------------------------------------------------- */ +/* some info functions and option processing */ + +static int license(FILE *f) { + fprintf(f, + "This program is free software; you can redistribute it and/or modify\n" + "it under the terms of the GNU General Public License as published by\n" + "the Free Software Foundation; either version 2 of the License, or\n" + "(at your option) any later version.\n" + "\n" + "This program is distributed in the hope that it will be useful,\n" + "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" + "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" + "GNU General Public License for more details.\n" + "\n" + "You should have received a copy of the GNU General Public License\n" + "along with this program; if not, write to the Free Software Foundation\n" + "Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\n" + ); + return 0; +} + +static int usage(FILE *f) { + fprintf(f, "Usage: " MKBITMAP " [options] [file...]\n"); + fprintf(f, "Options:\n"); + fprintf(f, " -h, --help - print this help message and exit\n"); + fprintf(f, " -v, --version - print version info and exit\n"); + fprintf(f, " -l, --license - print license info and exit\n"); + fprintf(f, " -o, --output <file> - output to file\n"); + fprintf(f, " -x, --nodefaults - turn off default options\n"); + fprintf(f, "Inversion:\n"); + fprintf(f, " -i, --invert - invert the input (undo 'blackboard' effect)\n"); + fprintf(f, "Highpass filtering:\n"); + fprintf(f, " -f, --filter <n> - apply highpass filter with radius n (default 4)\n"); + fprintf(f, " -n, --nofilter - no highpass filtering\n"); + fprintf(f, " -b, --blur <n> - apply lowpass filter with radius n (default: none)\n"); + fprintf(f, "Scaling:\n"); + fprintf(f, " -s, --scale <n> - scale by integer factor n (default 2)\n"); + fprintf(f, " -1, --linear - use linear interpolation\n"); + fprintf(f, " -3, --cubic - use cubic interpolation (default)\n"); + fprintf(f, "Thresholding:\n"); + fprintf(f, " -t, --threshold <n> - set threshold for bilevel conversion (default 0.45)\n"); + fprintf(f, " -g, --grey - no bilevel conversion, output a greymap\n"); + + fprintf(f, "\n"); + fprintf(f, "Possible input file formats are: pnm (pbm, pgm, ppm), bmp.\n"); + fprintf(f, "The default options are: -f 4 -s 2 -3 -t 0.45\n"); + + return 0; +} + +static struct option longopts[] = { + {"help", 0, 0, 'h'}, + {"version", 0, 0, 'v'}, + {"license", 0, 0, 'l'}, + {"output", 1, 0, 'o'}, + {"reset", 0, 0, 'x'}, + {"invert", 0, 0, 'i'}, + {"filter", 1, 0, 'f'}, + {"nofilter", 0, 0, 'n'}, + {"blur", 1, 0, 'b'}, + {"scale", 1, 0, 's'}, + {"linear", 0, 0, '1'}, + {"cubic", 0, 0, '3'}, + {"grey", 0, 0, 'g'}, + {"threshold", 1, 0, 't'}, + {0, 0, 0, 0} +}; + +static const char *shortopts = "hvlo:xif:nb:s:13gt:"; + +/* process options. On error, print error message to stderr and exit + with code 1 */ +static void dopts(int ac, char *av[]) { + int c; + char *p; + + /* set defaults for command line parameters */ + info.outfile = NULL; /* output file */ + info.infiles = NULL; /* input files */ + info.infilecount = 0; /* how many input files? */ + info.invert = 0; /* invert input? */ + info.highpass = 1; /* use highpass filter? */ + info.lambda = 4; /* highpass filter radius */ + info.lowpass = 0; /* use lowpass filter? */ + info.lambda1 = 0; /* lowpass filter radius */ + info.scale = 2; /* scaling factor */ + info.linear = 0; /* linear scaling? */ + info.bilevel = 1; /* convert to bilevel? */ + info.level = 0.45; /* cutoff grey level */ + info.outext = ".pbm"; /* output file extension */ + + while ((c = getopt_long(ac, av, shortopts, longopts, NULL)) != -1) { + switch (c) { + case 'h': + fprintf(stdout, "" MKBITMAP " " VERSION ". Transforms images into bitmaps with scaling and filtering.\n\n"); + usage(stdout); + exit(0); + break; + case 'v': + fprintf(stdout, "" MKBITMAP " " VERSION ". Copyright (C) 2001-2019 Peter Selinger.\n"); + exit(0); + break; + case 'l': + fprintf(stdout, "" MKBITMAP " " VERSION ". Copyright (C) 2001-2019 Peter Selinger.\n\n"); + license(stdout); + exit(0); + break; + case 'o': + free(info.outfile); + info.outfile = strdup(optarg); + if (!info.outfile) { + fprintf(stderr, "" MKBITMAP ": %s\n", strerror(errno)); + exit(2); + } + break; + case 'x': + info.invert = 0; + info.highpass = 0; + info.scale = 1; + info.bilevel = 0; + info.outext = ".pgm"; + break; + case 'i': + info.invert = 1; + break; + case 'f': + info.highpass = 1; + info.lambda = strtod(optarg, &p); + if (*p || info.lambda<0) { + fprintf(stderr, "" MKBITMAP ": invalid filter radius -- %s\n", optarg); + exit(1); + } + break; + case 'n': + info.highpass = 0; + break; + case 'b': + info.lowpass = 1; + info.lambda1 = strtod(optarg, &p); + if (*p || info.lambda1<0) { + fprintf(stderr, "" MKBITMAP ": invalid filter radius -- %s\n", optarg); + exit(1); + } + break; + case 's': + info.scale = strtol(optarg, &p, 0); + if (*p || info.scale<=0) { + fprintf(stderr, "" MKBITMAP ": invalid scaling factor -- %s\n", optarg); + exit(1); + } + break; + case '1': + info.linear = 1; + break; + case '3': + info.linear = 0; + break; + case 'g': + info.bilevel = 0; + info.outext = ".pgm"; + break; + case 't': + info.bilevel = 1; + info.outext = ".pbm"; + info.level = strtod(optarg, &p); + if (*p || info.level<0) { + fprintf(stderr, "" MKBITMAP ": invalid threshold -- %s\n", optarg); + exit(1); + } + break; + case '?': + fprintf(stderr, "Try --help for more info\n"); + exit(1); + break; + default: + fprintf(stderr, "" MKBITMAP ": Unimplemented option -- %c\n", c); + exit(1); + } + } + info.infiles = &av[optind]; + info.infilecount = ac-optind; + return; +} + +/* ---------------------------------------------------------------------- */ +/* auxiliary functions for file handling */ + +/* open a file for reading. Return stdin if filename is NULL or "-" */ +static FILE *my_fopen_read(const char *filename) { + if (filename == NULL || strcmp(filename, "-") == 0) { + return stdin; + } + return fopen(filename, "rb"); +} + +/* open a file for writing. Return stdout if filename is NULL or "-" */ +static FILE *my_fopen_write(const char *filename) { + if (filename == NULL || strcmp(filename, "-") == 0) { + return stdout; + } + return fopen(filename, "wb"); +} + +/* close a file, but do nothing is filename is NULL or "-" */ +static void my_fclose(FILE *f, const char *filename) { + if (filename == NULL || strcmp(filename, "-") == 0) { + return; + } + fclose(f); +} + +/* make output filename from input filename. Return an allocated value. */ +static char *make_outfilename(const char *infile, const char *ext) { + char *outfile; + char *p; + + if (strcmp(infile, "-") == 0) { + return strdup("-"); + } + + outfile = (char *) malloc(strlen(infile)+strlen(ext)+5); + if (!outfile) { + return NULL; + } + strcpy(outfile, infile); + p = strrchr(outfile, '.'); + if (p) { + *p = 0; + } + strcat(outfile, ext); + + /* check that input and output filenames are different */ + if (strcmp(infile, outfile) == 0) { + strcpy(outfile, infile); + strcat(outfile, "-out"); + } + + return outfile; +} + +/* ---------------------------------------------------------------------- */ +/* Main function */ + +int main(int ac, char *av[]) { + FILE *fin, *fout; + int i; + char *outfile; + + /* platform-specific initializations, e.g., set file i/o to binary */ + platform_init(); + + /* process options */ + dopts(ac, av); + + /* there are several ways to call us: + mkbitmap -- stdin to stdout + mkbitmap -o outfile -- stdin to outfile + mkbitmap file... -- encode each file and generate outfile names + mkbitmap file... -o outfile -- concatenate files and write to outfile + */ + + if (info.infilecount == 0 && info.outfile == NULL) { /* stdin to stdout */ + + process_file(stdin, stdout, "stdin", "stdout"); + return 0; + + } else if (info.infilecount == 0) { /* stdin to outfile */ + + fout = my_fopen_write(info.outfile); + if (!fout) { + fprintf(stderr, "" MKBITMAP ": %s: %s\n", info.outfile, strerror(errno)); + exit(2); + } + process_file(stdin, fout, "stdin", info.outfile); + my_fclose(fout, info.outfile); + free(info.outfile); + return 0; + + } else if (info.outfile == NULL) { /* infiles -> multiple outfiles */ + + for (i=0; i<info.infilecount; i++) { + outfile = make_outfilename(info.infiles[i], info.outext); + if (!outfile) { + fprintf(stderr, "" MKBITMAP ": %s\n", strerror(errno)); + exit(2); + } + fin = my_fopen_read(info.infiles[i]); + if (!fin) { + fprintf(stderr, "" MKBITMAP ": %s: %s\n", info.infiles[i], strerror(errno)); + exit(2); + } + fout = my_fopen_write(outfile); + if (!fout) { + fprintf(stderr, "" MKBITMAP ": %s: %s\n", outfile, strerror(errno)); + exit(2); + } + process_file(fin, fout, info.infiles[i], outfile); + my_fclose(fin, info.infiles[i]); + my_fclose(fout, outfile); + free(outfile); + } + return 0; + + } else { /* infiles to single outfile */ + + fout = my_fopen_write(info.outfile); + if (!fout) { + fprintf(stderr, "" MKBITMAP ": %s: %s\n", info.outfile, strerror(errno)); + exit(2); + } + for (i=0; i<info.infilecount; i++) { + fin = my_fopen_read(info.infiles[i]); + if (!fin) { + fprintf(stderr, "" MKBITMAP ": %s: %s\n", info.infiles[i], strerror(errno)); + exit(2); + } + process_file(fin, fout, info.infiles[i], info.outfile); + my_fclose(fin, info.infiles[i]); + } + my_fclose(fout, info.outfile); + free(info.outfile); + return 0; + + } + + /* not reached */ +} diff --git a/Build/source/libs/potrace/potrace-src/src/platform.h b/Build/source/libs/potrace/potrace-src/src/platform.h new file mode 100644 index 00000000000..f58bcc0d7ec --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/platform.h @@ -0,0 +1,48 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* this header file contains some platform dependent stuff */ + +#ifndef PLATFORM_H +#define PLATFORM_H + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +/* in Windows and OS/2, set all file i/o to binary */ +#ifdef __MINGW32__ +#include <fcntl.h> +unsigned int _CRT_fmode = _O_BINARY; +static inline void platform_init(void) { + _setmode(_fileno(stdin), _O_BINARY); + _setmode(_fileno(stdout), _O_BINARY); +} +#else + +#ifdef __CYGWIN__ +#include <fcntl.h> +#include <io.h> +static inline void platform_init(void) { + setmode(0, O_BINARY); + setmode(1, O_BINARY); +} +#else + +#ifdef __OS2__ +#include <fcntl.h> +static inline void platform_init(void) { + setmode(fileno(stdin), O_BINARY); + setmode(fileno(stdout), O_BINARY); +} +#else + +static inline void platform_init(void) { + /* NOP */ +} +#endif +#endif +#endif + +#endif /* PLATFORM_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/potracelib.c b/Build/source/libs/potrace/potrace-src/src/potracelib.c new file mode 100644 index 00000000000..bf16e3f1747 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/potracelib.c @@ -0,0 +1,114 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdlib.h> +#include <string.h> + +#include "potracelib.h" +#include "curve.h" +#include "decompose.h" +#include "trace.h" +#include "progress.h" + +/* default parameters */ +static const potrace_param_t param_default = { + 2, /* turdsize */ + POTRACE_TURNPOLICY_MINORITY, /* turnpolicy */ + 1.0, /* alphamax */ + 1, /* opticurve */ + 0.2, /* opttolerance */ + { + NULL, /* callback function */ + NULL, /* callback data */ + 0.0, 1.0, /* progress range */ + 0.0, /* granularity */ + }, +}; + +/* Return a fresh copy of the set of default parameters, or NULL on + failure with errno set. */ +potrace_param_t *potrace_param_default(void) { + potrace_param_t *p; + + p = (potrace_param_t *) malloc(sizeof(potrace_param_t)); + if (!p) { + return NULL; + } + memcpy(p, ¶m_default, sizeof(potrace_param_t)); + return p; +} + +/* On success, returns a Potrace state st with st->status == + POTRACE_STATUS_OK. On failure, returns NULL if no Potrace state + could be created (with errno set), or returns an incomplete Potrace + state (with st->status == POTRACE_STATUS_INCOMPLETE, and with errno + set). Complete or incomplete Potrace state can be freed with + potrace_state_free(). */ +potrace_state_t *potrace_trace(const potrace_param_t *param, const potrace_bitmap_t *bm) { + int r; + path_t *plist = NULL; + potrace_state_t *st; + progress_t prog; + progress_t subprog; + + /* prepare private progress bar state */ + prog.callback = param->progress.callback; + prog.data = param->progress.data; + prog.min = param->progress.min; + prog.max = param->progress.max; + prog.epsilon = param->progress.epsilon; + prog.d_prev = param->progress.min; + + /* allocate state object */ + st = (potrace_state_t *)malloc(sizeof(potrace_state_t)); + if (!st) { + return NULL; + } + + progress_subrange_start(0.0, 0.1, &prog, &subprog); + + /* process the image */ + r = bm_to_pathlist(bm, &plist, param, &subprog); + if (r) { + free(st); + return NULL; + } + + st->status = POTRACE_STATUS_OK; + st->plist = plist; + st->priv = NULL; /* private state currently unused */ + + progress_subrange_end(&prog, &subprog); + + progress_subrange_start(0.1, 1.0, &prog, &subprog); + + /* partial success. */ + r = process_path(plist, param, &subprog); + if (r) { + st->status = POTRACE_STATUS_INCOMPLETE; + } + + progress_subrange_end(&prog, &subprog); + + return st; +} + +/* free a Potrace state, without disturbing errno. */ +void potrace_state_free(potrace_state_t *st) { + pathlist_free(st->plist); + free(st); +} + +/* free a parameter list, without disturbing errno. */ +void potrace_param_free(potrace_param_t *p) { + free(p); +} + +const char *potrace_version(void) { + return "potracelib " VERSION ""; +} diff --git a/Build/source/libs/potrace/potrace-src/src/potracelib.h b/Build/source/libs/potrace/potrace-src/src/potracelib.h new file mode 100644 index 00000000000..ae2f18c7ebc --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/potracelib.h @@ -0,0 +1,139 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +#ifndef POTRACELIB_H +#define POTRACELIB_H + +/* this file defines the API for the core Potrace library. For a more + detailed description of the API, see potracelib.pdf */ + +#ifdef __cplusplus +extern "C" { +#endif + +/* ---------------------------------------------------------------------- */ +/* tracing parameters */ + +/* turn policies */ +#define POTRACE_TURNPOLICY_BLACK 0 +#define POTRACE_TURNPOLICY_WHITE 1 +#define POTRACE_TURNPOLICY_LEFT 2 +#define POTRACE_TURNPOLICY_RIGHT 3 +#define POTRACE_TURNPOLICY_MINORITY 4 +#define POTRACE_TURNPOLICY_MAJORITY 5 +#define POTRACE_TURNPOLICY_RANDOM 6 + +/* structure to hold progress bar callback data */ +struct potrace_progress_s { + void (*callback)(double progress, void *privdata); /* callback fn */ + void *data; /* callback function's private data */ + double min, max; /* desired range of progress, e.g. 0.0 to 1.0 */ + double epsilon; /* granularity: can skip smaller increments */ +}; +typedef struct potrace_progress_s potrace_progress_t; + +/* structure to hold tracing parameters */ +struct potrace_param_s { + int turdsize; /* area of largest path to be ignored */ + int turnpolicy; /* resolves ambiguous turns in path decomposition */ + double alphamax; /* corner threshold */ + int opticurve; /* use curve optimization? */ + double opttolerance; /* curve optimization tolerance */ + potrace_progress_t progress; /* progress callback function */ +}; +typedef struct potrace_param_s potrace_param_t; + +/* ---------------------------------------------------------------------- */ +/* bitmaps */ + +/* native word size */ +typedef unsigned long potrace_word; + +/* Internal bitmap format. The n-th scanline starts at scanline(n) = + (map + n*dy). Raster data is stored as a sequence of potrace_words + (NOT bytes). The leftmost bit of scanline n is the most significant + bit of scanline(n)[0]. */ +struct potrace_bitmap_s { + int w, h; /* width and height, in pixels */ + int dy; /* words per scanline (not bytes) */ + potrace_word *map; /* raw data, dy*h words */ +}; +typedef struct potrace_bitmap_s potrace_bitmap_t; + +/* ---------------------------------------------------------------------- */ +/* curves */ + +/* point */ +struct potrace_dpoint_s { + double x, y; +}; +typedef struct potrace_dpoint_s potrace_dpoint_t; + +/* segment tags */ +#define POTRACE_CURVETO 1 +#define POTRACE_CORNER 2 + +/* closed curve segment */ +struct potrace_curve_s { + int n; /* number of segments */ + int *tag; /* tag[n]: POTRACE_CURVETO or POTRACE_CORNER */ + potrace_dpoint_t (*c)[3]; /* c[n][3]: control points. + c[n][0] is unused for tag[n]=POTRACE_CORNER */ +}; +typedef struct potrace_curve_s potrace_curve_t; + +/* Linked list of signed curve segments. Also carries a tree structure. */ +struct potrace_path_s { + int area; /* area of the bitmap path */ + int sign; /* '+' or '-', depending on orientation */ + potrace_curve_t curve; /* this path's vector data */ + + struct potrace_path_s *next; /* linked list structure */ + + struct potrace_path_s *childlist; /* tree structure */ + struct potrace_path_s *sibling; /* tree structure */ + + struct potrace_privpath_s *priv; /* private state */ +}; +typedef struct potrace_path_s potrace_path_t; + +/* ---------------------------------------------------------------------- */ +/* Potrace state */ + +#define POTRACE_STATUS_OK 0 +#define POTRACE_STATUS_INCOMPLETE 1 + +struct potrace_state_s { + int status; + potrace_path_t *plist; /* vector data */ + + struct potrace_privstate_s *priv; /* private state */ +}; +typedef struct potrace_state_s potrace_state_t; + +/* ---------------------------------------------------------------------- */ +/* API functions */ + +/* get default parameters */ +potrace_param_t *potrace_param_default(void); + +/* free parameter set */ +void potrace_param_free(potrace_param_t *p); + +/* trace a bitmap */ +potrace_state_t *potrace_trace(const potrace_param_t *param, + const potrace_bitmap_t *bm); + +/* free a Potrace state */ +void potrace_state_free(potrace_state_t *st); + +/* return a static plain text version string identifying this version + of potracelib */ +const char *potrace_version(void); + +#ifdef __cplusplus +} /* end of extern "C" */ +#endif + +#endif /* POTRACELIB_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/potracelib_demo.c b/Build/source/libs/potrace/potrace-src/src/potracelib_demo.c new file mode 100644 index 00000000000..295c6ee1c6c --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/potracelib_demo.c @@ -0,0 +1,148 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* A simple and self-contained demo of the potracelib API */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <stdlib.h> + +#include "potracelib.h" + +#define WIDTH 250 +#define HEIGHT 250 + +/* ---------------------------------------------------------------------- */ +/* auxiliary bitmap functions */ + +/* macros for writing individual bitmap pixels */ +#define BM_WORDSIZE ((int)sizeof(potrace_word)) +#define BM_WORDBITS (8*BM_WORDSIZE) +#define BM_HIBIT (((potrace_word)1)<<(BM_WORDBITS-1)) +#define bm_scanline(bm, y) ((bm)->map + (y)*(bm)->dy) +#define bm_index(bm, x, y) (&bm_scanline(bm, y)[(x)/BM_WORDBITS]) +#define bm_mask(x) (BM_HIBIT >> ((x) & (BM_WORDBITS-1))) +#define bm_range(x, a) ((int)(x) >= 0 && (int)(x) < (a)) +#define bm_safe(bm, x, y) (bm_range(x, (bm)->w) && bm_range(y, (bm)->h)) +#define BM_USET(bm, x, y) (*bm_index(bm, x, y) |= bm_mask(x)) +#define BM_UCLR(bm, x, y) (*bm_index(bm, x, y) &= ~bm_mask(x)) +#define BM_UPUT(bm, x, y, b) ((b) ? BM_USET(bm, x, y) : BM_UCLR(bm, x, y)) +#define BM_PUT(bm, x, y, b) (bm_safe(bm, x, y) ? BM_UPUT(bm, x, y, b) : 0) + +/* return new un-initialized bitmap. NULL with errno on error */ +static potrace_bitmap_t *bm_new(int w, int h) { + potrace_bitmap_t *bm; + int dy = (w + BM_WORDBITS - 1) / BM_WORDBITS; + + bm = (potrace_bitmap_t *) malloc(sizeof(potrace_bitmap_t)); + if (!bm) { + return NULL; + } + bm->w = w; + bm->h = h; + bm->dy = dy; + bm->map = (potrace_word *) calloc(h, dy * BM_WORDSIZE); + if (!bm->map) { + free(bm); + return NULL; + } + return bm; +} + +/* free a bitmap */ +static void bm_free(potrace_bitmap_t *bm) { + if (bm != NULL) { + free(bm->map); + } + free(bm); +} + +/* ---------------------------------------------------------------------- */ +/* demo */ + +int main() { + int x, y, i; + potrace_bitmap_t *bm; + potrace_param_t *param; + potrace_path_t *p; + potrace_state_t *st; + int n, *tag; + potrace_dpoint_t (*c)[3]; + + /* create a bitmap */ + bm = bm_new(WIDTH, HEIGHT); + if (!bm) { + fprintf(stderr, "Error allocating bitmap: %s\n", strerror(errno)); + return 1; + } + + /* fill the bitmap with some pattern */ + for (y=0; y<HEIGHT; y++) { + for (x=0; x<WIDTH; x++) { + BM_PUT(bm, x, y, ((x*x + y*y*y) % 10000 < 5000) ? 1 : 0); + } + } + + /* set tracing parameters, starting from defaults */ + param = potrace_param_default(); + if (!param) { + fprintf(stderr, "Error allocating parameters: %s\n", strerror(errno)); + return 1; + } + param->turdsize = 0; + + /* trace the bitmap */ + st = potrace_trace(param, bm); + if (!st || st->status != POTRACE_STATUS_OK) { + fprintf(stderr, "Error tracing bitmap: %s\n", strerror(errno)); + return 1; + } + bm_free(bm); + + /* output vector data, e.g. as a rudimentary EPS file */ + printf("%%!PS-Adobe-3.0 EPSF-3.0\n"); + printf("%%%%BoundingBox: 0 0 %d %d\n", WIDTH, HEIGHT); + printf("gsave\n"); + + /* draw each curve */ + p = st->plist; + while (p != NULL) { + n = p->curve.n; + tag = p->curve.tag; + c = p->curve.c; + printf("%f %f moveto\n", c[n-1][2].x, c[n-1][2].y); + for (i=0; i<n; i++) { + switch (tag[i]) { + case POTRACE_CORNER: + printf("%f %f lineto\n", c[i][1].x, c[i][1].y); + printf("%f %f lineto\n", c[i][2].x, c[i][2].y); + break; + case POTRACE_CURVETO: + printf("%f %f %f %f %f %f curveto\n", + c[i][0].x, c[i][0].y, + c[i][1].x, c[i][1].y, + c[i][2].x, c[i][2].y); + break; + } + } + /* at the end of a group of a positive path and its negative + children, fill. */ + if (p->next == NULL || p->next->sign == '+') { + printf("0 setgray fill\n"); + } + p = p->next; + } + printf("grestore\n"); + printf("%%EOF\n"); + + potrace_state_free(st); + potrace_param_free(param); + + return 0; +} diff --git a/Build/source/libs/potrace/potrace-src/src/progress.h b/Build/source/libs/potrace/potrace-src/src/progress.h new file mode 100644 index 00000000000..5123368a7e8 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/progress.h @@ -0,0 +1,79 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* operations on potrace_progress_t objects, which are defined in + potracelib.h. Note: the code attempts to minimize runtime overhead + when no progress monitoring was requested. It also tries to + minimize excessive progress calculations beneath the "epsilon" + threshold. */ + +#ifndef PROGRESS_H +#define PROGRESS_H + +/* structure to hold progress bar callback data */ +struct progress_s { + void (*callback)(double progress, void *privdata); /* callback fn */ + void *data; /* callback function's private data */ + double min, max; /* desired range of progress, e.g. 0.0 to 1.0 */ + double epsilon; /* granularity: can skip smaller increments */ + double b; /* upper limit of subrange in superrange units */ + double d_prev; /* previous value of d */ +}; +typedef struct progress_s progress_t; + +/* notify given progress object of current progress. Note that d is + given in the 0.0-1.0 range, which will be scaled and translated to + the progress object's range. */ +static inline void progress_update(double d, progress_t *prog) { + double d_scaled; + + if (prog != NULL && prog->callback != NULL) { + d_scaled = prog->min * (1-d) + prog->max * d; + if (d == 1.0 || d_scaled >= prog->d_prev + prog->epsilon) { + prog->callback(prog->min * (1-d) + prog->max * d, prog->data); + prog->d_prev = d_scaled; + } + } +} + +/* start a subrange of the given progress object. The range is + narrowed to [a..b], relative to 0.0-1.0 coordinates. If new range + is below granularity threshold, disable further subdivisions. */ +static inline void progress_subrange_start(double a, double b, const progress_t *prog, progress_t *sub) { + double min, max; + + if (prog == NULL || prog->callback == NULL) { + sub->callback = NULL; + return; + } + + min = prog->min * (1-a) + prog->max * a; + max = prog->min * (1-b) + prog->max * b; + + if (max - min < prog->epsilon) { + sub->callback = NULL; /* no further progress info in subrange */ + sub->b = b; + return; + } + sub->callback = prog->callback; + sub->data = prog->data; + sub->epsilon = prog->epsilon; + sub->min = min; + sub->max = max; + sub->d_prev = prog->d_prev; + return; +} + +static inline void progress_subrange_end(progress_t *prog, progress_t *sub) { + if (prog != NULL && prog->callback != NULL) { + if (sub->callback == NULL) { + progress_update(sub->b, prog); + } else { + prog->d_prev = sub->d_prev; + } + } +} + +#endif /* PROGRESS_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/progress_bar.c b/Build/source/libs/potrace/potrace-src/src/progress_bar.c new file mode 100644 index 00000000000..4307f08234c --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/progress_bar.c @@ -0,0 +1,207 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* functions to render a progress bar for main.c. We provide a + standard and a simplified progress bar. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <math.h> +#include <stdlib.h> +#include <string.h> + +#include "potracelib.h" +#include "progress_bar.h" + +/* ---------------------------------------------------------------------- */ +/* vt100 progress bar */ + +#define COL0 "\033[G" /* reset cursor to column 0 */ + +struct vt100_progress_s { + char name[22]; /* filename for status bar */ + double dnext; /* threshold value for next tick */ +}; +typedef struct vt100_progress_s vt100_progress_t; + +/* print a progress bar using vt100 control characters. This is a + callback function that is potentially called often; thus, it has + been optimized for the typical case, which is when the progress bar + does not need updating. */ +static void vt100_progress(double d, void *data) { + vt100_progress_t *p = (vt100_progress_t *)data; + static char b[] = "========================================"; + int tick; /* number of visible tickmarks, 0..40 */ + int perc; /* visible percentage, 0..100 */ + + /* note: the 0.01 and 0.025 ensure that we always end on 40 + tickmarks and 100%, despite any rounding errors. The 0.995 + ensures that tick always increases when d >= p->dnext. */ + if (d >= p->dnext) { + tick = (int) floor(d*40+0.01); + perc = (int) floor(d*100+0.025); + fprintf(stderr, "%-21s |%-40s| %d%% " COL0 "", p->name, b+40-tick, perc); + fflush(stderr); + p->dnext = (tick+0.995) / 40.0; + } +} + +/* Initialize progress bar. Return 0 on success or 1 on failure with + errno set. */ +static int init_vt100_progress(potrace_progress_t *prog, const char *filename, int count) { + vt100_progress_t *p; + const char *q, *s; + int len; + + p = (vt100_progress_t *) malloc(sizeof(vt100_progress_t)); + if (!p) { + return 1; + } + + /* initialize callback function's data */ + p->dnext = 0; + + if (count != 0) { + sprintf(p->name, " (p.%d):", count+1); + } else { + s = filename; + if ((q = strrchr(s, '/')) != NULL) { + s = q+1; + } + len = strlen(s); + strncpy(p->name, s, 21); + p->name[20] = 0; + if (len > 20) { + p->name[17] = '.'; + p->name[18] = '.'; + p->name[19] = '.'; + } + strcat(p->name, ":"); + } + + /* initialize progress parameters */ + prog->callback = &vt100_progress; + prog->data = (void *)p; + prog->min = 0.0; + prog->max = 1.0; + prog->epsilon = 0.0; + + /* draw first progress bar */ + vt100_progress(0.0, prog->data); + return 0; +} + +/* Finalize the progress bar. */ +static void term_vt100_progress(potrace_progress_t *prog) { + fprintf(stderr, "\n"); + fflush(stderr); + free(prog->data); + return; +} + +/* progress bar interface structure */ +static progress_bar_t progress_bar_vt100_struct = { + init_vt100_progress, + term_vt100_progress, +}; +progress_bar_t *progress_bar_vt100 = &progress_bar_vt100_struct; + +/* ---------------------------------------------------------------------- */ +/* another progress bar for dumb terminals */ + +struct simplified_progress_s { + int n; /* number of ticks displayed so far */ + double dnext; /* threshold value for next tick */ +}; +typedef struct simplified_progress_s simplified_progress_t; + +/* print a simplified progress bar, not using any special tty control + codes. Optimized for frequent calling. */ +static void simplified_progress(double d, void *data) { + simplified_progress_t *p = (simplified_progress_t *)data; + int tick; /* number of visible tickmarks, 0..40 */ + + /* note: the 0.01 and 0.025 ensure that we always end on 40 + tickmarks and 100%, despite any rounding errors. The 0.995 + ensures that tick always increases when d >= p->dnext. */ + if (d >= p->dnext) { + tick = (int) floor(d*40+0.01); + while (p->n < tick) { + fputc('=', stderr); + p->n++; + } + fflush(stderr); + p->dnext = (tick+0.995) / 40.0; + } +} + +/* Initialize parameters for simplified progress bar. Return 0 on + success or 1 on error with errno set. */ +static int init_simplified_progress(potrace_progress_t *prog, const char *filename, int count) { + simplified_progress_t *p; + const char *q, *s; + int len; + char buf[22]; + + p = (simplified_progress_t *) malloc(sizeof(simplified_progress_t)); + if (!p) { + return 1; + } + + /* initialize callback function's data */ + p->n = 0; + p->dnext = 0; + + if (count != 0) { + sprintf(buf, " (p.%d):", count+1); + } else { + s = filename; + if ((q = strrchr(s, '/')) != NULL) { + s = q+1; + } + len = strlen(s); + strncpy(buf, s, 21); + buf[20] = 0; + if (len > 20) { + buf[17] = '.'; + buf[18] = '.'; + buf[19] = '.'; + } + strcat(buf, ":"); + } + + fprintf(stderr, "%-21s |", buf); + + /* initialize progress parameters */ + prog->callback = &simplified_progress; + prog->data = (void *)p; + prog->min = 0.0; + prog->max = 1.0; + prog->epsilon = 0.0; + + /* draw first progress bar */ + simplified_progress(0.0, prog->data); + return 0; +} + +static void term_simplified_progress(potrace_progress_t *prog) { + simplified_progress_t *p = (simplified_progress_t *)prog->data; + + simplified_progress(1.0, (void *)p); + fprintf(stderr, "| 100%%\n"); + fflush(stderr); + free(p); + return; +} + +/* progress bar interface structure */ +static progress_bar_t progress_bar_simplified_struct = { + init_simplified_progress, + term_simplified_progress, +}; +progress_bar_t *progress_bar_simplified = &progress_bar_simplified_struct; + diff --git a/Build/source/libs/potrace/potrace-src/src/progress_bar.h b/Build/source/libs/potrace/potrace-src/src/progress_bar.h new file mode 100644 index 00000000000..e98af14c388 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/progress_bar.h @@ -0,0 +1,26 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* functions to render a progress bar for main.c. We provide a + standard and a simplified progress bar. */ + +#ifndef PROGRESS_BAR_H +#define PROGRESS_BAR_H + +#include "potracelib.h" + +/* structure to hold a progress bar interface */ +struct progress_bar_s { + int (*init)(potrace_progress_t *prog, const char *filename, int count); + void (*term)(potrace_progress_t *prog); +}; +typedef struct progress_bar_s progress_bar_t; + +extern progress_bar_t *progress_bar_vt100; +extern progress_bar_t *progress_bar_simplified; + + + +#endif /* PROGRESS_BAR_H */ + diff --git a/Build/source/libs/potrace/potrace-src/src/render.c b/Build/source/libs/potrace/potrace-src/src/render.c new file mode 100644 index 00000000000..7bf9b8a8e89 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/render.c @@ -0,0 +1,245 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <math.h> +#include <string.h> + +#include "render.h" +#include "greymap.h" +#include "auxiliary.h" + +/* ---------------------------------------------------------------------- */ +/* routines for anti-aliased rendering of curves */ + +/* we use the following method. Given a point (x,y) (with real-valued + coordinates) in the plane, let (xi,yi) be the integer part of the + coordinates, i.e., xi=floor(x), yi=floor(y). Define a path from + (x,y) to infinity as follows: path(x,y) = + (x,y)--(xi+1,y)--(xi+1,yi)--(+infty,yi). Now as the point (x,y) + moves smoothly across the plane, the path path(x,y) sweeps + (non-smoothly) across a certain area. We proportionately blacken + the area as the path moves "downward", and we whiten the area as + the path moves "upward". This way, after the point has traversed a + closed curve, the interior of the curve has been darkened + (counterclockwise movement) or lightened (clockwise movement). (The + "grey shift" is actually proportional to the winding number). By + choosing the above path with mostly integer coordinates, we achieve + that only pixels close to (x,y) receive grey values and are subject + to round-off errors. The grey value of pixels far away from (x,y) + is always in "integer" (where 0=black, 1=white). As a special + trick, we keep an accumulator rm->a1, which holds a double value to + be added to the grey value to be added to the current pixel + (xi,yi). Only when changing "current" pixels, we convert this + double value to an integer. This way we avoid round-off errors at + the meeting points of line segments. Another speedup measure is + that we sometimes use the rm->incrow_buf array to postpone + incrementing or decrementing an entire row. If incrow_buf[y]=x+1!=0, + then all the pixels (x,y),(x+1,y),(x+2,y),... are scheduled to be + incremented/decremented (which one is the case will be clear from + context). This keeps the greymap operations reasonably local. */ + +/* allocate a new rendering state */ +render_t *render_new(greymap_t *gm) { + render_t *rm; + + rm = (render_t *) malloc(sizeof(render_t)); + if (!rm) { + return NULL; + } + memset(rm, 0, sizeof(render_t)); + rm->gm = gm; + rm->incrow_buf = (int *) calloc(gm->h, sizeof(int)); + if (!rm->incrow_buf) { + free(rm); + return NULL; + } + return rm; +} + +/* free a given rendering state. Note: this does not free the + underlying greymap. */ +void render_free(render_t *rm) { + free(rm->incrow_buf); + free(rm); +} + +/* close path */ +void render_close(render_t *rm) { + if (rm->x0 != rm->x1 || rm->y0 != rm->y1) { + render_lineto(rm, rm->x0, rm->y0); + } + GM_INC(rm->gm, rm->x0i, rm->y0i, (rm->a0+rm->a1)*255); + + /* assert (rm->x0i != rm->x1i || rm->y0i != rm->y1i); */ + + /* the persistent state is now undefined */ +} + +/* move point */ +void render_moveto(render_t *rm, double x, double y) { + /* close the previous path */ + render_close(rm); + + rm->x0 = rm->x1 = x; + rm->y0 = rm->y1 = y; + rm->x0i = (int)floor(rm->x0); + rm->x1i = (int)floor(rm->x1); + rm->y0i = (int)floor(rm->y0); + rm->y1i = (int)floor(rm->y1); + rm->a0 = rm->a1 = 0; +} + +/* add b to pixels (x,y) and all pixels to the right of it. However, + use rm->incrow_buf as a buffer to economize on multiple calls */ +static void incrow(render_t *rm, int x, int y, int b) { + int i, x0; + + if (y < 0 || y >= rm->gm->h) { + return; + } + + if (x < 0) { + x = 0; + } else if (x > rm->gm->w) { + x = rm->gm->w; + } + if (rm->incrow_buf[y] == 0) { + rm->incrow_buf[y] = x+1; /* store x+1 so that we can use 0 for "vacant" */ + return; + } + x0 = rm->incrow_buf[y]-1; + rm->incrow_buf[y] = 0; + if (x0 < x) { + for (i=x0; i<x; i++) { + GM_INC(rm->gm, i, y, -b); + } + } else { + for (i=x; i<x0; i++) { + GM_INC(rm->gm, i, y, b); + } + } +} + +/* render a straight line */ +void render_lineto(render_t *rm, double x2, double y2) { + int x2i, y2i; + double t0=2, s0=2; + int sn, tn; + double ss=2, ts=2; + double r0, r1; + int i, j; + int rxi, ryi; + int s; + + x2i = (int)floor(x2); + y2i = (int)floor(y2); + + sn = abs(x2i - rm->x1i); + tn = abs(y2i - rm->y1i); + + if (sn) { + s0 = ((x2>rm->x1 ? rm->x1i+1 : rm->x1i) - rm->x1)/(x2-rm->x1); + ss = fabs(1.0/(x2-rm->x1)); + } + if (tn) { + t0 = ((y2>rm->y1 ? rm->y1i+1 : rm->y1i) - rm->y1)/(y2-rm->y1); + ts = fabs(1.0/(y2-rm->y1)); + } + + r0 = 0; + + i = 0; + j = 0; + + rxi = rm->x1i; + ryi = rm->y1i; + + while (i<sn || j<tn) { + if (j>=tn || (i<sn && s0+i*ss < t0+j*ts)) { + r1 = s0+i*ss; + i++; + s = 1; + } else { + r1 = t0+j*ts; + j++; + s = 0; + } + /* render line from r0 to r1 segment of (rm->x1,rm->y1)..(x2,y2) */ + + /* move point to r1 */ + rm->a1 += (r1-r0)*(y2-rm->y1)*(rxi+1-((r0+r1)/2.0*(x2-rm->x1)+rm->x1)); + + /* move point across pixel boundary */ + if (s && x2>rm->x1) { + GM_INC(rm->gm, rxi, ryi, rm->a1*255); + rm->a1 = 0; + rxi++; + rm->a1 += rm->y1+r1*(y2-rm->y1)-ryi; + } else if (!s && y2>rm->y1) { + GM_INC(rm->gm, rxi, ryi, rm->a1*255); + rm->a1 = 0; + incrow(rm, rxi+1, ryi, 255); + ryi++; + } else if (s && x2<=rm->x1) { + rm->a1 -= rm->y1+r1*(y2-rm->y1)-ryi; + GM_INC(rm->gm, rxi, ryi, rm->a1*255); + rm->a1 = 0; + rxi--; + } else if (!s && y2<=rm->y1) { + GM_INC(rm->gm, rxi, ryi, rm->a1*255); + rm->a1 = 0; + ryi--; + incrow(rm, rxi+1, ryi, -255); + } + + r0 = r1; + } + + /* move point to (x2,y2) */ + + r1 = 1; + rm->a1 += (r1-r0)*(y2-rm->y1)*(rxi+1-((r0+r1)/2.0*(x2-rm->x1)+rm->x1)); + + rm->x1i = x2i; + rm->y1i = y2i; + rm->x1 = x2; + rm->y1 = y2; + + /* assert (rxi != rm->x1i || ryi != rm->y1i); */ +} + +/* render a Bezier curve. */ +void render_curveto(render_t *rm, double x2, double y2, double x3, double y3, double x4, double y4) { + double x1, y1, dd0, dd1, dd, delta, e2, epsilon, t; + + x1 = rm->x1; /* starting point */ + y1 = rm->y1; + + /* we approximate the curve by small line segments. The interval + size, epsilon, is determined on the fly so that the distance + between the true curve and its approximation does not exceed the + desired accuracy delta. */ + + delta = .1; /* desired accuracy, in pixels */ + + /* let dd = maximal value of 2nd derivative over curve - this must + occur at an endpoint. */ + dd0 = sq(x1-2*x2+x3) + sq(y1-2*y2+y3); + dd1 = sq(x2-2*x3+x4) + sq(y2-2*y3+y4); + dd = 6*sqrt(max(dd0, dd1)); + e2 = 8*delta <= dd ? 8*delta/dd : 1; + epsilon = sqrt(e2); /* necessary interval size */ + + for (t=epsilon; t<1; t+=epsilon) { + render_lineto(rm, x1*cu(1-t)+3*x2*sq(1-t)*t+3*x3*(1-t)*sq(t)+x4*cu(t), + y1*cu(1-t)+3*y2*sq(1-t)*t+3*y3*(1-t)*sq(t)+y4*cu(t)); + } + render_lineto(rm, x4, y4); +} diff --git a/Build/source/libs/potrace/potrace-src/src/render.h b/Build/source/libs/potrace/potrace-src/src/render.h new file mode 100644 index 00000000000..3168eb39cfa --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/render.h @@ -0,0 +1,27 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef RENDER_H +#define RENDER_H + +#include "greymap.h" + +struct render_s { + greymap_t *gm; + double x0, y0, x1, y1; + int x0i, y0i, x1i, y1i; + double a0, a1; + int *incrow_buf; +}; +typedef struct render_s render_t; + +render_t *render_new(greymap_t *gm); +void render_free(render_t *rm); +void render_close(render_t *rm); +void render_moveto(render_t *rm, double x, double y); +void render_lineto(render_t *rm, double x, double y); +void render_curveto(render_t *rm, double x2, double y2, double x3, double y3, double x4, double y4); + +#endif /* RENDER_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/trace.c b/Build/source/libs/potrace/potrace-src/src/trace.c new file mode 100644 index 00000000000..b830764447b --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/trace.c @@ -0,0 +1,1249 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* transform jaggy paths into smooth curves */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <math.h> +#include <stdlib.h> +#include <string.h> + +#include "potracelib.h" +#include "curve.h" +#include "lists.h" +#include "auxiliary.h" +#include "trace.h" +#include "progress.h" + +#define INFTY 10000000 /* it suffices that this is longer than any + path; it need not be really infinite */ +#define COS179 -0.999847695156 /* the cosine of 179 degrees */ + +/* ---------------------------------------------------------------------- */ +#define SAFE_CALLOC(var, n, typ) \ + if ((var = (typ *)calloc(n, sizeof(typ))) == NULL) goto calloc_error + +/* ---------------------------------------------------------------------- */ +/* auxiliary functions */ + +/* return a direction that is 90 degrees counterclockwise from p2-p0, + but then restricted to one of the major wind directions (n, nw, w, etc) */ +static inline point_t dorth_infty(dpoint_t p0, dpoint_t p2) { + point_t r; + + r.y = sign(p2.x-p0.x); + r.x = -sign(p2.y-p0.y); + + return r; +} + +/* return (p1-p0)x(p2-p0), the area of the parallelogram */ +static inline double dpara(dpoint_t p0, dpoint_t p1, dpoint_t p2) { + double x1, y1, x2, y2; + + x1 = p1.x-p0.x; + y1 = p1.y-p0.y; + x2 = p2.x-p0.x; + y2 = p2.y-p0.y; + + return x1*y2 - x2*y1; +} + +/* ddenom/dpara have the property that the square of radius 1 centered + at p1 intersects the line p0p2 iff |dpara(p0,p1,p2)| <= ddenom(p0,p2) */ +static inline double ddenom(dpoint_t p0, dpoint_t p2) { + point_t r = dorth_infty(p0, p2); + + return r.y*(p2.x-p0.x) - r.x*(p2.y-p0.y); +} + +/* return 1 if a <= b < c < a, in a cyclic sense (mod n) */ +static inline int cyclic(int a, int b, int c) { + if (a<=c) { + return (a<=b && b<c); + } else { + return (a<=b || b<c); + } +} + +/* determine the center and slope of the line i..j. Assume i<j. Needs + "sum" components of p to be set. */ +static void pointslope(privpath_t *pp, int i, int j, dpoint_t *ctr, dpoint_t *dir) { + /* assume i<j */ + + int n = pp->len; + sums_t *sums = pp->sums; + + double x, y, x2, xy, y2; + double k; + double a, b, c, lambda2, l; + int r=0; /* rotations from i to j */ + + while (j>=n) { + j-=n; + r+=1; + } + while (i>=n) { + i-=n; + r-=1; + } + while (j<0) { + j+=n; + r-=1; + } + while (i<0) { + i+=n; + r+=1; + } + + x = sums[j+1].x-sums[i].x+r*sums[n].x; + y = sums[j+1].y-sums[i].y+r*sums[n].y; + x2 = sums[j+1].x2-sums[i].x2+r*sums[n].x2; + xy = sums[j+1].xy-sums[i].xy+r*sums[n].xy; + y2 = sums[j+1].y2-sums[i].y2+r*sums[n].y2; + k = j+1-i+r*n; + + ctr->x = x/k; + ctr->y = y/k; + + a = (x2-(double)x*x/k)/k; + b = (xy-(double)x*y/k)/k; + c = (y2-(double)y*y/k)/k; + + lambda2 = (a+c+sqrt((a-c)*(a-c)+4*b*b))/2; /* larger e.value */ + + /* now find e.vector for lambda2 */ + a -= lambda2; + c -= lambda2; + + if (fabs(a) >= fabs(c)) { + l = sqrt(a*a+b*b); + if (l!=0) { + dir->x = -b/l; + dir->y = a/l; + } + } else { + l = sqrt(c*c+b*b); + if (l!=0) { + dir->x = -c/l; + dir->y = b/l; + } + } + if (l==0) { + dir->x = dir->y = 0; /* sometimes this can happen when k=4: + the two eigenvalues coincide */ + } +} + +/* the type of (affine) quadratic forms, represented as symmetric 3x3 + matrices. The value of the quadratic form at a vector (x,y) is v^t + Q v, where v = (x,y,1)^t. */ +typedef double quadform_t[3][3]; + +/* Apply quadratic form Q to vector w = (w.x,w.y) */ +static inline double quadform(quadform_t Q, dpoint_t w) { + double v[3]; + int i, j; + double sum; + + v[0] = w.x; + v[1] = w.y; + v[2] = 1; + sum = 0.0; + + for (i=0; i<3; i++) { + for (j=0; j<3; j++) { + sum += v[i] * Q[i][j] * v[j]; + } + } + return sum; +} + +/* calculate p1 x p2 */ +static inline int xprod(point_t p1, point_t p2) { + return p1.x*p2.y - p1.y*p2.x; +} + +/* calculate (p1-p0)x(p3-p2) */ +static inline double cprod(dpoint_t p0, dpoint_t p1, dpoint_t p2, dpoint_t p3) { + double x1, y1, x2, y2; + + x1 = p1.x - p0.x; + y1 = p1.y - p0.y; + x2 = p3.x - p2.x; + y2 = p3.y - p2.y; + + return x1*y2 - x2*y1; +} + +/* calculate (p1-p0)*(p2-p0) */ +static inline double iprod(dpoint_t p0, dpoint_t p1, dpoint_t p2) { + double x1, y1, x2, y2; + + x1 = p1.x - p0.x; + y1 = p1.y - p0.y; + x2 = p2.x - p0.x; + y2 = p2.y - p0.y; + + return x1*x2 + y1*y2; +} + +/* calculate (p1-p0)*(p3-p2) */ +static inline double iprod1(dpoint_t p0, dpoint_t p1, dpoint_t p2, dpoint_t p3) { + double x1, y1, x2, y2; + + x1 = p1.x - p0.x; + y1 = p1.y - p0.y; + x2 = p3.x - p2.x; + y2 = p3.y - p2.y; + + return x1*x2 + y1*y2; +} + +/* calculate distance between two points */ +static inline double ddist(dpoint_t p, dpoint_t q) { + return sqrt(sq(p.x-q.x)+sq(p.y-q.y)); +} + +/* calculate point of a bezier curve */ +static inline dpoint_t bezier(double t, dpoint_t p0, dpoint_t p1, dpoint_t p2, dpoint_t p3) { + double s = 1-t; + dpoint_t res; + + /* Note: a good optimizing compiler (such as gcc-3) reduces the + following to 16 multiplications, using common subexpression + elimination. */ + + res.x = s*s*s*p0.x + 3*(s*s*t)*p1.x + 3*(t*t*s)*p2.x + t*t*t*p3.x; + res.y = s*s*s*p0.y + 3*(s*s*t)*p1.y + 3*(t*t*s)*p2.y + t*t*t*p3.y; + + return res; +} + +/* calculate the point t in [0..1] on the (convex) bezier curve + (p0,p1,p2,p3) which is tangent to q1-q0. Return -1.0 if there is no + solution in [0..1]. */ +static double tangent(dpoint_t p0, dpoint_t p1, dpoint_t p2, dpoint_t p3, dpoint_t q0, dpoint_t q1) { + double A, B, C; /* (1-t)^2 A + 2(1-t)t B + t^2 C = 0 */ + double a, b, c; /* a t^2 + b t + c = 0 */ + double d, s, r1, r2; + + A = cprod(p0, p1, q0, q1); + B = cprod(p1, p2, q0, q1); + C = cprod(p2, p3, q0, q1); + + a = A - 2*B + C; + b = -2*A + 2*B; + c = A; + + d = b*b - 4*a*c; + + if (a==0 || d<0) { + return -1.0; + } + + s = sqrt(d); + + r1 = (-b + s) / (2 * a); + r2 = (-b - s) / (2 * a); + + if (r1 >= 0 && r1 <= 1) { + return r1; + } else if (r2 >= 0 && r2 <= 1) { + return r2; + } else { + return -1.0; + } +} + +/* ---------------------------------------------------------------------- */ +/* Preparation: fill in the sum* fields of a path (used for later + rapid summing). Return 0 on success, 1 with errno set on + failure. */ +static int calc_sums(privpath_t *pp) { + int i, x, y; + int n = pp->len; + + SAFE_CALLOC(pp->sums, pp->len+1, sums_t); + + /* origin */ + pp->x0 = pp->pt[0].x; + pp->y0 = pp->pt[0].y; + + /* preparatory computation for later fast summing */ + pp->sums[0].x2 = pp->sums[0].xy = pp->sums[0].y2 = pp->sums[0].x = pp->sums[0].y = 0; + for (i=0; i<n; i++) { + x = pp->pt[i].x - pp->x0; + y = pp->pt[i].y - pp->y0; + pp->sums[i+1].x = pp->sums[i].x + x; + pp->sums[i+1].y = pp->sums[i].y + y; + pp->sums[i+1].x2 = pp->sums[i].x2 + (double)x*x; + pp->sums[i+1].xy = pp->sums[i].xy + (double)x*y; + pp->sums[i+1].y2 = pp->sums[i].y2 + (double)y*y; + } + return 0; + + calloc_error: + return 1; +} + +/* ---------------------------------------------------------------------- */ +/* Stage 1: determine the straight subpaths (Sec. 2.2.1). Fill in the + "lon" component of a path object (based on pt/len). For each i, + lon[i] is the furthest index such that a straight line can be drawn + from i to lon[i]. Return 1 on error with errno set, else 0. */ + +/* this algorithm depends on the fact that the existence of straight + subpaths is a triplewise property. I.e., there exists a straight + line through squares i0,...,in iff there exists a straight line + through i,j,k, for all i0<=i<j<k<=in. (Proof?) */ + +/* this implementation of calc_lon is O(n^2). It replaces an older + O(n^3) version. A "constraint" means that future points must + satisfy xprod(constraint[0], cur) >= 0 and xprod(constraint[1], + cur) <= 0. */ + +/* Remark for Potrace 1.1: the current implementation of calc_lon is + more complex than the implementation found in Potrace 1.0, but it + is considerably faster. The introduction of the "nc" data structure + means that we only have to test the constraints for "corner" + points. On a typical input file, this speeds up the calc_lon + function by a factor of 31.2, thereby decreasing its time share + within the overall Potrace algorithm from 72.6% to 7.82%, and + speeding up the overall algorithm by a factor of 3.36. On another + input file, calc_lon was sped up by a factor of 6.7, decreasing its + time share from 51.4% to 13.61%, and speeding up the overall + algorithm by a factor of 1.78. In any case, the savings are + substantial. */ + +/* returns 0 on success, 1 on error with errno set */ +static int calc_lon(privpath_t *pp) { + point_t *pt = pp->pt; + int n = pp->len; + int i, j, k, k1; + int ct[4], dir; + point_t constraint[2]; + point_t cur; + point_t off; + int *pivk = NULL; /* pivk[n] */ + int *nc = NULL; /* nc[n]: next corner */ + point_t dk; /* direction of k-k1 */ + int a, b, c, d; + + SAFE_CALLOC(pivk, n, int); + SAFE_CALLOC(nc, n, int); + + /* initialize the nc data structure. Point from each point to the + furthest future point to which it is connected by a vertical or + horizontal segment. We take advantage of the fact that there is + always a direction change at 0 (due to the path decomposition + algorithm). But even if this were not so, there is no harm, as + in practice, correctness does not depend on the word "furthest" + above. */ + k = 0; + for (i=n-1; i>=0; i--) { + if (pt[i].x != pt[k].x && pt[i].y != pt[k].y) { + k = i+1; /* necessarily i<n-1 in this case */ + } + nc[i] = k; + } + + SAFE_CALLOC(pp->lon, n, int); + + /* determine pivot points: for each i, let pivk[i] be the furthest k + such that all j with i<j<k lie on a line connecting i,k. */ + + for (i=n-1; i>=0; i--) { + ct[0] = ct[1] = ct[2] = ct[3] = 0; + + /* keep track of "directions" that have occurred */ + dir = (3+3*(pt[mod(i+1,n)].x-pt[i].x)+(pt[mod(i+1,n)].y-pt[i].y))/2; + ct[dir]++; + + constraint[0].x = 0; + constraint[0].y = 0; + constraint[1].x = 0; + constraint[1].y = 0; + + /* find the next k such that no straight line from i to k */ + k = nc[i]; + k1 = i; + while (1) { + + dir = (3+3*sign(pt[k].x-pt[k1].x)+sign(pt[k].y-pt[k1].y))/2; + ct[dir]++; + + /* if all four "directions" have occurred, cut this path */ + if (ct[0] && ct[1] && ct[2] && ct[3]) { + pivk[i] = k1; + goto foundk; + } + + cur.x = pt[k].x - pt[i].x; + cur.y = pt[k].y - pt[i].y; + + /* see if current constraint is violated */ + if (xprod(constraint[0], cur) < 0 || xprod(constraint[1], cur) > 0) { + goto constraint_viol; + } + + /* else, update constraint */ + if (abs(cur.x) <= 1 && abs(cur.y) <= 1) { + /* no constraint */ + } else { + off.x = cur.x + ((cur.y>=0 && (cur.y>0 || cur.x<0)) ? 1 : -1); + off.y = cur.y + ((cur.x<=0 && (cur.x<0 || cur.y<0)) ? 1 : -1); + if (xprod(constraint[0], off) >= 0) { + constraint[0] = off; + } + off.x = cur.x + ((cur.y<=0 && (cur.y<0 || cur.x<0)) ? 1 : -1); + off.y = cur.y + ((cur.x>=0 && (cur.x>0 || cur.y<0)) ? 1 : -1); + if (xprod(constraint[1], off) <= 0) { + constraint[1] = off; + } + } + k1 = k; + k = nc[k1]; + if (!cyclic(k,i,k1)) { + break; + } + } + constraint_viol: + /* k1 was the last "corner" satisfying the current constraint, and + k is the first one violating it. We now need to find the last + point along k1..k which satisfied the constraint. */ + dk.x = sign(pt[k].x-pt[k1].x); + dk.y = sign(pt[k].y-pt[k1].y); + cur.x = pt[k1].x - pt[i].x; + cur.y = pt[k1].y - pt[i].y; + /* find largest integer j such that xprod(constraint[0], cur+j*dk) + >= 0 and xprod(constraint[1], cur+j*dk) <= 0. Use bilinearity + of xprod. */ + a = xprod(constraint[0], cur); + b = xprod(constraint[0], dk); + c = xprod(constraint[1], cur); + d = xprod(constraint[1], dk); + /* find largest integer j such that a+j*b>=0 and c+j*d<=0. This + can be solved with integer arithmetic. */ + j = INFTY; + if (b<0) { + j = floordiv(a,-b); + } + if (d>0) { + j = min(j, floordiv(-c,d)); + } + pivk[i] = mod(k1+j,n); + foundk: + ; + } /* for i */ + + /* clean up: for each i, let lon[i] be the largest k such that for + all i' with i<=i'<k, i'<k<=pivk[i']. */ + + j=pivk[n-1]; + pp->lon[n-1]=j; + for (i=n-2; i>=0; i--) { + if (cyclic(i+1,pivk[i],j)) { + j=pivk[i]; + } + pp->lon[i]=j; + } + + for (i=n-1; cyclic(mod(i+1,n),j,pp->lon[i]); i--) { + pp->lon[i] = j; + } + + free(pivk); + free(nc); + return 0; + + calloc_error: + free(pivk); + free(nc); + return 1; +} + + +/* ---------------------------------------------------------------------- */ +/* Stage 2: calculate the optimal polygon (Sec. 2.2.2-2.2.4). */ + +/* Auxiliary function: calculate the penalty of an edge from i to j in + the given path. This needs the "lon" and "sum*" data. */ + +static double penalty3(privpath_t *pp, int i, int j) { + int n = pp->len; + point_t *pt = pp->pt; + sums_t *sums = pp->sums; + + /* assume 0<=i<j<=n */ + double x, y, x2, xy, y2; + double k; + double a, b, c, s; + double px, py, ex, ey; + + int r = 0; /* rotations from i to j */ + + if (j>=n) { + j -= n; + r = 1; + } + + /* critical inner loop: the "if" gives a 4.6 percent speedup */ + if (r == 0) { + x = sums[j+1].x - sums[i].x; + y = sums[j+1].y - sums[i].y; + x2 = sums[j+1].x2 - sums[i].x2; + xy = sums[j+1].xy - sums[i].xy; + y2 = sums[j+1].y2 - sums[i].y2; + k = j+1 - i; + } else { + x = sums[j+1].x - sums[i].x + sums[n].x; + y = sums[j+1].y - sums[i].y + sums[n].y; + x2 = sums[j+1].x2 - sums[i].x2 + sums[n].x2; + xy = sums[j+1].xy - sums[i].xy + sums[n].xy; + y2 = sums[j+1].y2 - sums[i].y2 + sums[n].y2; + k = j+1 - i + n; + } + + px = (pt[i].x + pt[j].x) / 2.0 - pt[0].x; + py = (pt[i].y + pt[j].y) / 2.0 - pt[0].y; + ey = (pt[j].x - pt[i].x); + ex = -(pt[j].y - pt[i].y); + + a = ((x2 - 2*x*px) / k + px*px); + b = ((xy - x*py - y*px) / k + px*py); + c = ((y2 - 2*y*py) / k + py*py); + + s = ex*ex*a + 2*ex*ey*b + ey*ey*c; + + return sqrt(s); +} + +/* find the optimal polygon. Fill in the m and po components. Return 1 + on failure with errno set, else 0. Non-cyclic version: assumes i=0 + is in the polygon. Fixme: implement cyclic version. */ +static int bestpolygon(privpath_t *pp) +{ + int i, j, m, k; + int n = pp->len; + double *pen = NULL; /* pen[n+1]: penalty vector */ + int *prev = NULL; /* prev[n+1]: best path pointer vector */ + int *clip0 = NULL; /* clip0[n]: longest segment pointer, non-cyclic */ + int *clip1 = NULL; /* clip1[n+1]: backwards segment pointer, non-cyclic */ + int *seg0 = NULL; /* seg0[m+1]: forward segment bounds, m<=n */ + int *seg1 = NULL; /* seg1[m+1]: backward segment bounds, m<=n */ + double thispen; + double best; + int c; + + SAFE_CALLOC(pen, n+1, double); + SAFE_CALLOC(prev, n+1, int); + SAFE_CALLOC(clip0, n, int); + SAFE_CALLOC(clip1, n+1, int); + SAFE_CALLOC(seg0, n+1, int); + SAFE_CALLOC(seg1, n+1, int); + + /* calculate clipped paths */ + for (i=0; i<n; i++) { + c = mod(pp->lon[mod(i-1,n)]-1,n); + if (c == i) { + c = mod(i+1,n); + } + if (c < i) { + clip0[i] = n; + } else { + clip0[i] = c; + } + } + + /* calculate backwards path clipping, non-cyclic. j <= clip0[i] iff + clip1[j] <= i, for i,j=0..n. */ + j = 1; + for (i=0; i<n; i++) { + while (j <= clip0[i]) { + clip1[j] = i; + j++; + } + } + + /* calculate seg0[j] = longest path from 0 with j segments */ + i = 0; + for (j=0; i<n; j++) { + seg0[j] = i; + i = clip0[i]; + } + seg0[j] = n; + m = j; + + /* calculate seg1[j] = longest path to n with m-j segments */ + i = n; + for (j=m; j>0; j--) { + seg1[j] = i; + i = clip1[i]; + } + seg1[0] = 0; + + /* now find the shortest path with m segments, based on penalty3 */ + /* note: the outer 2 loops jointly have at most n iterations, thus + the worst-case behavior here is quadratic. In practice, it is + close to linear since the inner loop tends to be short. */ + pen[0]=0; + for (j=1; j<=m; j++) { + for (i=seg1[j]; i<=seg0[j]; i++) { + best = -1; + for (k=seg0[j-1]; k>=clip1[i]; k--) { + thispen = penalty3(pp, k, i) + pen[k]; + if (best < 0 || thispen < best) { + prev[i] = k; + best = thispen; + } + } + pen[i] = best; + } + } + + pp->m = m; + SAFE_CALLOC(pp->po, m, int); + + /* read off shortest path */ + for (i=n, j=m-1; i>0; j--) { + i = prev[i]; + pp->po[j] = i; + } + + free(pen); + free(prev); + free(clip0); + free(clip1); + free(seg0); + free(seg1); + return 0; + + calloc_error: + free(pen); + free(prev); + free(clip0); + free(clip1); + free(seg0); + free(seg1); + return 1; +} + +/* ---------------------------------------------------------------------- */ +/* Stage 3: vertex adjustment (Sec. 2.3.1). */ + +/* Adjust vertices of optimal polygon: calculate the intersection of + the two "optimal" line segments, then move it into the unit square + if it lies outside. Return 1 with errno set on error; 0 on + success. */ + +static int adjust_vertices(privpath_t *pp) { + int m = pp->m; + int *po = pp->po; + int n = pp->len; + point_t *pt = pp->pt; + int x0 = pp->x0; + int y0 = pp->y0; + + dpoint_t *ctr = NULL; /* ctr[m] */ + dpoint_t *dir = NULL; /* dir[m] */ + quadform_t *q = NULL; /* q[m] */ + double v[3]; + double d; + int i, j, k, l; + dpoint_t s; + int r; + + SAFE_CALLOC(ctr, m, dpoint_t); + SAFE_CALLOC(dir, m, dpoint_t); + SAFE_CALLOC(q, m, quadform_t); + + r = privcurve_init(&pp->curve, m); + if (r) { + goto calloc_error; + } + + /* calculate "optimal" point-slope representation for each line + segment */ + for (i=0; i<m; i++) { + j = po[mod(i+1,m)]; + j = mod(j-po[i],n)+po[i]; + pointslope(pp, po[i], j, &ctr[i], &dir[i]); + } + + /* represent each line segment as a singular quadratic form; the + distance of a point (x,y) from the line segment will be + (x,y,1)Q(x,y,1)^t, where Q=q[i]. */ + for (i=0; i<m; i++) { + d = sq(dir[i].x) + sq(dir[i].y); + if (d == 0.0) { + for (j=0; j<3; j++) { + for (k=0; k<3; k++) { + q[i][j][k] = 0; + } + } + } else { + v[0] = dir[i].y; + v[1] = -dir[i].x; + v[2] = - v[1] * ctr[i].y - v[0] * ctr[i].x; + for (l=0; l<3; l++) { + for (k=0; k<3; k++) { + q[i][l][k] = v[l] * v[k] / d; + } + } + } + } + + /* now calculate the "intersections" of consecutive segments. + Instead of using the actual intersection, we find the point + within a given unit square which minimizes the square distance to + the two lines. */ + for (i=0; i<m; i++) { + quadform_t Q; + dpoint_t w; + double dx, dy; + double det; + double min, cand; /* minimum and candidate for minimum of quad. form */ + double xmin, ymin; /* coordinates of minimum */ + int z; + + /* let s be the vertex, in coordinates relative to x0/y0 */ + s.x = pt[po[i]].x-x0; + s.y = pt[po[i]].y-y0; + + /* intersect segments i-1 and i */ + + j = mod(i-1,m); + + /* add quadratic forms */ + for (l=0; l<3; l++) { + for (k=0; k<3; k++) { + Q[l][k] = q[j][l][k] + q[i][l][k]; + } + } + + while(1) { + /* minimize the quadratic form Q on the unit square */ + /* find intersection */ + +#ifdef HAVE_GCC_LOOP_BUG + /* work around gcc bug #12243 */ + free(NULL); +#endif + + det = Q[0][0]*Q[1][1] - Q[0][1]*Q[1][0]; + if (det != 0.0) { + w.x = (-Q[0][2]*Q[1][1] + Q[1][2]*Q[0][1]) / det; + w.y = ( Q[0][2]*Q[1][0] - Q[1][2]*Q[0][0]) / det; + break; + } + + /* matrix is singular - lines are parallel. Add another, + orthogonal axis, through the center of the unit square */ + if (Q[0][0]>Q[1][1]) { + v[0] = -Q[0][1]; + v[1] = Q[0][0]; + } else if (Q[1][1]) { + v[0] = -Q[1][1]; + v[1] = Q[1][0]; + } else { + v[0] = 1; + v[1] = 0; + } + d = sq(v[0]) + sq(v[1]); + v[2] = - v[1] * s.y - v[0] * s.x; + for (l=0; l<3; l++) { + for (k=0; k<3; k++) { + Q[l][k] += v[l] * v[k] / d; + } + } + } + dx = fabs(w.x-s.x); + dy = fabs(w.y-s.y); + if (dx <= .5 && dy <= .5) { + pp->curve.vertex[i].x = w.x+x0; + pp->curve.vertex[i].y = w.y+y0; + continue; + } + + /* the minimum was not in the unit square; now minimize quadratic + on boundary of square */ + min = quadform(Q, s); + xmin = s.x; + ymin = s.y; + + if (Q[0][0] == 0.0) { + goto fixx; + } + for (z=0; z<2; z++) { /* value of the y-coordinate */ + w.y = s.y-0.5+z; + w.x = - (Q[0][1] * w.y + Q[0][2]) / Q[0][0]; + dx = fabs(w.x-s.x); + cand = quadform(Q, w); + if (dx <= .5 && cand < min) { + min = cand; + xmin = w.x; + ymin = w.y; + } + } + fixx: + if (Q[1][1] == 0.0) { + goto corners; + } + for (z=0; z<2; z++) { /* value of the x-coordinate */ + w.x = s.x-0.5+z; + w.y = - (Q[1][0] * w.x + Q[1][2]) / Q[1][1]; + dy = fabs(w.y-s.y); + cand = quadform(Q, w); + if (dy <= .5 && cand < min) { + min = cand; + xmin = w.x; + ymin = w.y; + } + } + corners: + /* check four corners */ + for (l=0; l<2; l++) { + for (k=0; k<2; k++) { + w.x = s.x-0.5+l; + w.y = s.y-0.5+k; + cand = quadform(Q, w); + if (cand < min) { + min = cand; + xmin = w.x; + ymin = w.y; + } + } + } + + pp->curve.vertex[i].x = xmin + x0; + pp->curve.vertex[i].y = ymin + y0; + continue; + } + + free(ctr); + free(dir); + free(q); + return 0; + + calloc_error: + free(ctr); + free(dir); + free(q); + return 1; +} + +/* ---------------------------------------------------------------------- */ +/* Stage 4: smoothing and corner analysis (Sec. 2.3.3) */ + +/* reverse orientation of a path */ +static void reverse(privcurve_t *curve) { + int m = curve->n; + int i, j; + dpoint_t tmp; + + for (i=0, j=m-1; i<j; i++, j--) { + tmp = curve->vertex[i]; + curve->vertex[i] = curve->vertex[j]; + curve->vertex[j] = tmp; + } +} + +/* Always succeeds */ +static void smooth(privcurve_t *curve, double alphamax) { + int m = curve->n; + + int i, j, k; + double dd, denom, alpha; + dpoint_t p2, p3, p4; + + /* examine each vertex and find its best fit */ + for (i=0; i<m; i++) { + j = mod(i+1, m); + k = mod(i+2, m); + p4 = interval(1/2.0, curve->vertex[k], curve->vertex[j]); + + denom = ddenom(curve->vertex[i], curve->vertex[k]); + if (denom != 0.0) { + dd = dpara(curve->vertex[i], curve->vertex[j], curve->vertex[k]) / denom; + dd = fabs(dd); + alpha = dd>1 ? (1 - 1.0/dd) : 0; + alpha = alpha / 0.75; + } else { + alpha = 4/3.0; + } + curve->alpha0[j] = alpha; /* remember "original" value of alpha */ + + if (alpha >= alphamax) { /* pointed corner */ + curve->tag[j] = POTRACE_CORNER; + curve->c[j][1] = curve->vertex[j]; + curve->c[j][2] = p4; + } else { + if (alpha < 0.55) { + alpha = 0.55; + } else if (alpha > 1) { + alpha = 1; + } + p2 = interval(.5+.5*alpha, curve->vertex[i], curve->vertex[j]); + p3 = interval(.5+.5*alpha, curve->vertex[k], curve->vertex[j]); + curve->tag[j] = POTRACE_CURVETO; + curve->c[j][0] = p2; + curve->c[j][1] = p3; + curve->c[j][2] = p4; + } + curve->alpha[j] = alpha; /* store the "cropped" value of alpha */ + curve->beta[j] = 0.5; + } + curve->alphacurve = 1; + + return; +} + +/* ---------------------------------------------------------------------- */ +/* Stage 5: Curve optimization (Sec. 2.4) */ + +/* a private type for the result of opti_penalty */ +struct opti_s { + double pen; /* penalty */ + dpoint_t c[2]; /* curve parameters */ + double t, s; /* curve parameters */ + double alpha; /* curve parameter */ +}; +typedef struct opti_s opti_t; + +/* calculate best fit from i+.5 to j+.5. Assume i<j (cyclically). + Return 0 and set badness and parameters (alpha, beta), if + possible. Return 1 if impossible. */ +static int opti_penalty(privpath_t *pp, int i, int j, opti_t *res, double opttolerance, int *convc, double *areac) { + int m = pp->curve.n; + int k, k1, k2, conv, i1; + double area, alpha, d, d1, d2; + dpoint_t p0, p1, p2, p3, pt; + double A, R, A1, A2, A3, A4; + double s, t; + + /* check convexity, corner-freeness, and maximum bend < 179 degrees */ + + if (i==j) { /* sanity - a full loop can never be an opticurve */ + return 1; + } + + k = i; + i1 = mod(i+1, m); + k1 = mod(k+1, m); + conv = convc[k1]; + if (conv == 0) { + return 1; + } + d = ddist(pp->curve.vertex[i], pp->curve.vertex[i1]); + for (k=k1; k!=j; k=k1) { + k1 = mod(k+1, m); + k2 = mod(k+2, m); + if (convc[k1] != conv) { + return 1; + } + if (sign(cprod(pp->curve.vertex[i], pp->curve.vertex[i1], pp->curve.vertex[k1], pp->curve.vertex[k2])) != conv) { + return 1; + } + if (iprod1(pp->curve.vertex[i], pp->curve.vertex[i1], pp->curve.vertex[k1], pp->curve.vertex[k2]) < d * ddist(pp->curve.vertex[k1], pp->curve.vertex[k2]) * COS179) { + return 1; + } + } + + /* the curve we're working in: */ + p0 = pp->curve.c[mod(i,m)][2]; + p1 = pp->curve.vertex[mod(i+1,m)]; + p2 = pp->curve.vertex[mod(j,m)]; + p3 = pp->curve.c[mod(j,m)][2]; + + /* determine its area */ + area = areac[j] - areac[i]; + area -= dpara(pp->curve.vertex[0], pp->curve.c[i][2], pp->curve.c[j][2])/2; + if (i>=j) { + area += areac[m]; + } + + /* find intersection o of p0p1 and p2p3. Let t,s such that o = + interval(t,p0,p1) = interval(s,p3,p2). Let A be the area of the + triangle (p0,o,p3). */ + + A1 = dpara(p0, p1, p2); + A2 = dpara(p0, p1, p3); + A3 = dpara(p0, p2, p3); + /* A4 = dpara(p1, p2, p3); */ + A4 = A1+A3-A2; + + if (A2 == A1) { /* this should never happen */ + return 1; + } + + t = A3/(A3-A4); + s = A2/(A2-A1); + A = A2 * t / 2.0; + + if (A == 0.0) { /* this should never happen */ + return 1; + } + + R = area / A; /* relative area */ + alpha = 2 - sqrt(4 - R / 0.3); /* overall alpha for p0-o-p3 curve */ + + res->c[0] = interval(t * alpha, p0, p1); + res->c[1] = interval(s * alpha, p3, p2); + res->alpha = alpha; + res->t = t; + res->s = s; + + p1 = res->c[0]; + p2 = res->c[1]; /* the proposed curve is now (p0,p1,p2,p3) */ + + res->pen = 0; + + /* calculate penalty */ + /* check tangency with edges */ + for (k=mod(i+1,m); k!=j; k=k1) { + k1 = mod(k+1,m); + t = tangent(p0, p1, p2, p3, pp->curve.vertex[k], pp->curve.vertex[k1]); + if (t<-.5) { + return 1; + } + pt = bezier(t, p0, p1, p2, p3); + d = ddist(pp->curve.vertex[k], pp->curve.vertex[k1]); + if (d == 0.0) { /* this should never happen */ + return 1; + } + d1 = dpara(pp->curve.vertex[k], pp->curve.vertex[k1], pt) / d; + if (fabs(d1) > opttolerance) { + return 1; + } + if (iprod(pp->curve.vertex[k], pp->curve.vertex[k1], pt) < 0 || iprod(pp->curve.vertex[k1], pp->curve.vertex[k], pt) < 0) { + return 1; + } + res->pen += sq(d1); + } + + /* check corners */ + for (k=i; k!=j; k=k1) { + k1 = mod(k+1,m); + t = tangent(p0, p1, p2, p3, pp->curve.c[k][2], pp->curve.c[k1][2]); + if (t<-.5) { + return 1; + } + pt = bezier(t, p0, p1, p2, p3); + d = ddist(pp->curve.c[k][2], pp->curve.c[k1][2]); + if (d == 0.0) { /* this should never happen */ + return 1; + } + d1 = dpara(pp->curve.c[k][2], pp->curve.c[k1][2], pt) / d; + d2 = dpara(pp->curve.c[k][2], pp->curve.c[k1][2], pp->curve.vertex[k1]) / d; + d2 *= 0.75 * pp->curve.alpha[k1]; + if (d2 < 0) { + d1 = -d1; + d2 = -d2; + } + if (d1 < d2 - opttolerance) { + return 1; + } + if (d1 < d2) { + res->pen += sq(d1 - d2); + } + } + + return 0; +} + +/* optimize the path p, replacing sequences of Bezier segments by a + single segment when possible. Return 0 on success, 1 with errno set + on failure. */ +static int opticurve(privpath_t *pp, double opttolerance) { + int m = pp->curve.n; + int *pt = NULL; /* pt[m+1] */ + double *pen = NULL; /* pen[m+1] */ + int *len = NULL; /* len[m+1] */ + opti_t *opt = NULL; /* opt[m+1] */ + int om; + int i,j,r; + opti_t o; + dpoint_t p0; + int i1; + double area; + double alpha; + double *s = NULL; + double *t = NULL; + + int *convc = NULL; /* conv[m]: pre-computed convexities */ + double *areac = NULL; /* cumarea[m+1]: cache for fast area computation */ + + SAFE_CALLOC(pt, m+1, int); + SAFE_CALLOC(pen, m+1, double); + SAFE_CALLOC(len, m+1, int); + SAFE_CALLOC(opt, m+1, opti_t); + SAFE_CALLOC(convc, m, int); + SAFE_CALLOC(areac, m+1, double); + + /* pre-calculate convexity: +1 = right turn, -1 = left turn, 0 = corner */ + for (i=0; i<m; i++) { + if (pp->curve.tag[i] == POTRACE_CURVETO) { + convc[i] = sign(dpara(pp->curve.vertex[mod(i-1,m)], pp->curve.vertex[i], pp->curve.vertex[mod(i+1,m)])); + } else { + convc[i] = 0; + } + } + + /* pre-calculate areas */ + area = 0.0; + areac[0] = 0.0; + p0 = pp->curve.vertex[0]; + for (i=0; i<m; i++) { + i1 = mod(i+1, m); + if (pp->curve.tag[i1] == POTRACE_CURVETO) { + alpha = pp->curve.alpha[i1]; + area += 0.3*alpha*(4-alpha)*dpara(pp->curve.c[i][2], pp->curve.vertex[i1], pp->curve.c[i1][2])/2; + area += dpara(p0, pp->curve.c[i][2], pp->curve.c[i1][2])/2; + } + areac[i+1] = area; + } + + pt[0] = -1; + pen[0] = 0; + len[0] = 0; + + /* Fixme: we always start from a fixed point -- should find the best + curve cyclically */ + + for (j=1; j<=m; j++) { + /* calculate best path from 0 to j */ + pt[j] = j-1; + pen[j] = pen[j-1]; + len[j] = len[j-1]+1; + + for (i=j-2; i>=0; i--) { + r = opti_penalty(pp, i, mod(j,m), &o, opttolerance, convc, areac); + if (r) { + break; + } + if (len[j] > len[i]+1 || (len[j] == len[i]+1 && pen[j] > pen[i] + o.pen)) { + pt[j] = i; + pen[j] = pen[i] + o.pen; + len[j] = len[i] + 1; + opt[j] = o; + } + } + } + om = len[m]; + r = privcurve_init(&pp->ocurve, om); + if (r) { + goto calloc_error; + } + SAFE_CALLOC(s, om, double); + SAFE_CALLOC(t, om, double); + + j = m; + for (i=om-1; i>=0; i--) { + if (pt[j]==j-1) { + pp->ocurve.tag[i] = pp->curve.tag[mod(j,m)]; + pp->ocurve.c[i][0] = pp->curve.c[mod(j,m)][0]; + pp->ocurve.c[i][1] = pp->curve.c[mod(j,m)][1]; + pp->ocurve.c[i][2] = pp->curve.c[mod(j,m)][2]; + pp->ocurve.vertex[i] = pp->curve.vertex[mod(j,m)]; + pp->ocurve.alpha[i] = pp->curve.alpha[mod(j,m)]; + pp->ocurve.alpha0[i] = pp->curve.alpha0[mod(j,m)]; + pp->ocurve.beta[i] = pp->curve.beta[mod(j,m)]; + s[i] = t[i] = 1.0; + } else { + pp->ocurve.tag[i] = POTRACE_CURVETO; + pp->ocurve.c[i][0] = opt[j].c[0]; + pp->ocurve.c[i][1] = opt[j].c[1]; + pp->ocurve.c[i][2] = pp->curve.c[mod(j,m)][2]; + pp->ocurve.vertex[i] = interval(opt[j].s, pp->curve.c[mod(j,m)][2], pp->curve.vertex[mod(j,m)]); + pp->ocurve.alpha[i] = opt[j].alpha; + pp->ocurve.alpha0[i] = opt[j].alpha; + s[i] = opt[j].s; + t[i] = opt[j].t; + } + j = pt[j]; + } + + /* calculate beta parameters */ + for (i=0; i<om; i++) { + i1 = mod(i+1,om); + pp->ocurve.beta[i] = s[i] / (s[i] + t[i1]); + } + pp->ocurve.alphacurve = 1; + + free(pt); + free(pen); + free(len); + free(opt); + free(s); + free(t); + free(convc); + free(areac); + return 0; + + calloc_error: + free(pt); + free(pen); + free(len); + free(opt); + free(s); + free(t); + free(convc); + free(areac); + return 1; +} + +/* ---------------------------------------------------------------------- */ + +#define TRY(x) if (x) goto try_error + +/* return 0 on success, 1 on error with errno set. */ +int process_path(path_t *plist, const potrace_param_t *param, progress_t *progress) { + path_t *p; + double nn = 0, cn = 0; + + if (progress->callback) { + /* precompute task size for progress estimates */ + nn = 0; + list_forall (p, plist) { + nn += p->priv->len; + } + cn = 0; + } + + /* call downstream function with each path */ + list_forall (p, plist) { + TRY(calc_sums(p->priv)); + TRY(calc_lon(p->priv)); + TRY(bestpolygon(p->priv)); + TRY(adjust_vertices(p->priv)); + if (p->sign == '-') { /* reverse orientation of negative paths */ + reverse(&p->priv->curve); + } + smooth(&p->priv->curve, param->alphamax); + if (param->opticurve) { + TRY(opticurve(p->priv, param->opttolerance)); + p->priv->fcurve = &p->priv->ocurve; + } else { + p->priv->fcurve = &p->priv->curve; + } + privcurve_to_curve(p->priv->fcurve, &p->curve); + + if (progress->callback) { + cn += p->priv->len; + progress_update(cn/nn, progress); + } + } + + progress_update(1.0, progress); + + return 0; + + try_error: + return 1; +} diff --git a/Build/source/libs/potrace/potrace-src/src/trace.h b/Build/source/libs/potrace/potrace-src/src/trace.h new file mode 100644 index 00000000000..7ddcb89c7bc --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/trace.h @@ -0,0 +1,15 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef TRACE_H +#define TRACE_H + +#include "potracelib.h" +#include "progress.h" +#include "curve.h" + +int process_path(path_t *plist, const potrace_param_t *param, progress_t *progress); + +#endif /* TRACE_H */ diff --git a/Build/source/libs/potrace/potrace-src/src/trans.c b/Build/source/libs/potrace/potrace-src/src/trans.c new file mode 100644 index 00000000000..779feb55cd6 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/trans.c @@ -0,0 +1,127 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + +/* calculations with coordinate transformations and bounding boxes */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <math.h> +#include <string.h> + +#include "trans.h" +#include "bbox.h" + +/* rotate the coordinate system counterclockwise by alpha degrees. The + new bounding box will be the smallest box containing the rotated + old bounding box */ +void trans_rotate(trans_t *r, double alpha) { + double s, c, x0, x1, y0, y1, o0, o1; + trans_t t_struct; + trans_t *t = &t_struct; + + memcpy(t, r, sizeof(trans_t)); + + s = sin(alpha/180*M_PI); + c = cos(alpha/180*M_PI); + + /* apply the transformation matrix to the sides of the bounding box */ + x0 = c * t->bb[0]; + x1 = s * t->bb[0]; + y0 = -s * t->bb[1]; + y1 = c * t->bb[1]; + + /* determine new bounding box, and origin of old bb within new bb */ + r->bb[0] = fabs(x0) + fabs(y0); + r->bb[1] = fabs(x1) + fabs(y1); + o0 = - min(x0,0) - min(y0,0); + o1 = - min(x1,0) - min(y1,0); + + r->orig[0] = o0 + c * t->orig[0] - s * t->orig[1]; + r->orig[1] = o1 + s * t->orig[0] + c * t->orig[1]; + r->x[0] = c * t->x[0] - s * t->x[1]; + r->x[1] = s * t->x[0] + c * t->x[1]; + r->y[0] = c * t->y[0] - s * t->y[1]; + r->y[1] = s * t->y[0] + c * t->y[1]; +} + +/* return the standard cartesian coordinate system for an w x h rectangle. */ +void trans_from_rect(trans_t *r, double w, double h) { + r->bb[0] = w; + r->bb[1] = h; + r->orig[0] = 0.0; + r->orig[1] = 0.0; + r->x[0] = 1.0; + r->x[1] = 0.0; + r->y[0] = 0.0; + r->y[1] = 1.0; + r->scalex = 1.0; + r->scaley = 1.0; +} + +/* rescale the coordinate system r by factor sc >= 0. */ +void trans_rescale(trans_t *r, double sc) { + r->bb[0] *= sc; + r->bb[1] *= sc; + r->orig[0] *= sc; + r->orig[1] *= sc; + r->x[0] *= sc; + r->x[1] *= sc; + r->y[0] *= sc; + r->y[1] *= sc; + r->scalex *= sc; + r->scaley *= sc; +} + +/* rescale the coordinate system to size w x h */ +void trans_scale_to_size(trans_t *r, double w, double h) { + double xsc = w/r->bb[0]; + double ysc = h/r->bb[1]; + + r->bb[0] = w; + r->bb[1] = h; + r->orig[0] *= xsc; + r->orig[1] *= ysc; + r->x[0] *= xsc; + r->x[1] *= ysc; + r->y[0] *= xsc; + r->y[1] *= ysc; + r->scalex *= xsc; + r->scaley *= ysc; + + if (w<0) { + r->orig[0] -= w; + r->bb[0] = -w; + } + if (h<0) { + r->orig[1] -= h; + r->bb[1] = -h; + } +} + +/* adjust the bounding box to the actual vector outline */ +void trans_tighten(trans_t *r, potrace_path_t *plist) { + interval_t i; + dpoint_t dir; + int j; + + /* if pathlist is empty, do nothing */ + if (!plist) { + return; + } + + for (j=0; j<2; j++) { + dir.x = r->x[j]; + dir.y = r->y[j]; + path_limits(plist, dir, &i); + if (i.min == i.max) { + /* make the extent non-zero to avoid later division by zero errors */ + i.max = i.min+0.5; + i.min = i.min-0.5; + } + r->bb[j] = i.max - i.min; + r->orig[j] = -i.min; + } +} diff --git a/Build/source/libs/potrace/potrace-src/src/trans.h b/Build/source/libs/potrace/potrace-src/src/trans.h new file mode 100644 index 00000000000..1d4cd073005 --- /dev/null +++ b/Build/source/libs/potrace/potrace-src/src/trans.h @@ -0,0 +1,36 @@ +/* Copyright (C) 2001-2019 Peter Selinger. + This file is part of Potrace. It is free software and it is covered + by the GNU General Public License. See the file COPYING for details. */ + + +#ifndef TRANS_H +#define TRANS_H + +#include "auxiliary.h" + +/* structure to hold a coordinate transformation */ +struct trans_s { + double bb[2]; /* dimensions of bounding box */ + double orig[2]; /* origin relative to bounding box */ + double x[2]; /* basis vector for the "x" direction */ + double y[2]; /* basis vector for the "y" direction */ + double scalex, scaley; /* redundant info for some backends' benefit */ +}; +typedef struct trans_s trans_t; + +/* apply a coordinate transformation to a point */ +static inline dpoint_t trans(dpoint_t p, trans_t t) { + dpoint_t res; + + res.x = t.orig[0] + p.x * t.x[0] + p.y * t.y[0]; + res.y = t.orig[1] + p.x * t.x[1] + p.y * t.y[1]; + return res; +} + +void trans_rotate(trans_t *r, double alpha); +void trans_from_rect(trans_t *r, double w, double h); +void trans_rescale(trans_t *r, double sc); +void trans_scale_to_size(trans_t *r, double w, double h); +void trans_tighten(trans_t *r, potrace_path_t *plist); + +#endif /* TRANS_H */ |