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-rw-r--r--Build/source/texk/dvipdf-x/src/dvi.c1967
1 files changed, 1967 insertions, 0 deletions
diff --git a/Build/source/texk/dvipdf-x/src/dvi.c b/Build/source/texk/dvipdf-x/src/dvi.c
new file mode 100644
index 00000000000..62a315f4831
--- /dev/null
+++ b/Build/source/texk/dvipdf-x/src/dvi.c
@@ -0,0 +1,1967 @@
+/*
+
+ This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
+
+ Copyright (C) 2002-2012 by Jin-Hwan Cho and Shunsaku Hirata,
+ the dvipdfmx project team.
+
+ Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+*/
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include "system.h"
+#include "mem.h"
+#include "error.h"
+#include "mfileio.h"
+#include "numbers.h"
+
+#include "pdfdev.h"
+#include "pdfdoc.h"
+#include "pdfparse.h"
+#include "pdfencrypt.h"
+
+#include "fontmap.h"
+
+#include "dvicodes.h"
+#include "tfm.h"
+#include "vf.h"
+#include "subfont.h"
+
+#include "spc_util.h"
+#include "specials.h"
+
+#include "dvi.h"
+
+#define DVI_STACK_DEPTH_MAX 256u
+#define TEX_FONTS_ALLOC_SIZE 16u
+#define VF_NESTING_MAX 16u
+
+/* UTF-32 over U+FFFF -> UTF-16 surrogate pair */
+#define UTF32toUTF16HS(x) (0xd800 + (((x-0x10000) >> 10) & 0x3ff))
+#define UTF32toUTF16LS(x) (0xdc00 + ( x & 0x3ff))
+
+/* Interal Variables */
+static FILE *dvi_file = NULL;
+
+static unsigned long *page_loc = NULL;
+static UNSIGNED_PAIR num_pages = 0;
+
+static unsigned long dvi_file_size = 0;
+
+static struct dvi_header
+{
+ UNSIGNED_QUAD unit_num;
+ UNSIGNED_QUAD unit_den;
+ UNSIGNED_QUAD mag;
+ UNSIGNED_QUAD media_width, media_height;
+ UNSIGNED_PAIR stackdepth;
+ char comment[257];
+} dvi_info = {
+ 25400000 , /* num */
+ 473628672, /* den */
+ 1000, /* mag */
+ 0, 0, /* media width and height */
+ 0, /* stackdepth */
+ {'\0'} /* comment */
+};
+
+static double dev_origin_x = 72.0, dev_origin_y = 770.0;
+
+#define PHYSICAL 1
+#define VIRTUAL 2
+#define SUBFONT 3
+#define DVI 1
+#define VF 2
+
+static struct loaded_font
+{
+ int type; /* Type is physical or virtual */
+ int font_id; /* id returned by dev (for PHYSICAL fonts)
+ * or by vf module for (VIRTUAL fonts)
+ */
+ int subfont_id; /* id returned by subfont_locate_font() */
+ int tfm_id;
+ spt_t size;
+ int source; /* Source is either DVI or VF */
+} *loaded_fonts = NULL;
+static int num_loaded_fonts = 0, max_loaded_fonts = 0;
+
+static void
+need_more_fonts (unsigned n)
+{
+ if (num_loaded_fonts + n > max_loaded_fonts) {
+ max_loaded_fonts += TEX_FONTS_ALLOC_SIZE;
+ loaded_fonts = RENEW (loaded_fonts, max_loaded_fonts, struct loaded_font);
+ }
+}
+
+static struct font_def
+{
+ long tex_id;
+ spt_t point_size;
+ spt_t design_size;
+ char *font_name;
+ int font_id; /* index of _loaded_ font in loaded_fonts array */
+ int used;
+} *def_fonts = NULL;
+
+static int num_def_fonts = 0, max_def_fonts = 0;
+static int compute_boxes = 0, link_annot = 1;
+static int verbose = 0;
+
+void
+dvi_set_verbose (void)
+{
+ verbose++;
+ subfont_set_verbose();
+ tfm_set_verbose();
+ vf_set_verbose ();
+ spc_set_verbose();
+}
+
+unsigned
+dvi_npages (void)
+{
+ return num_pages;
+}
+
+static const char invalid_signature[] =
+"Something is wrong. Are you sure this is a DVI file?";
+
+#define range_check_loc(loc) \
+ if ((loc) > dvi_file_size) {\
+ ERROR(invalid_signature); \
+ }
+
+static long
+find_post (void)
+{
+ long current;
+ int ch;
+
+ /* First find end of file */
+ dvi_file_size = file_size(dvi_file);
+ current = dvi_file_size;
+
+ /* Scan backwards through PADDING */
+ do {
+ current--;
+ seek_absolute(dvi_file, current);
+ } while ((ch = fgetc(dvi_file)) == PADDING &&
+ current > 0);
+
+ /* file_position now points to last non padding character or
+ * beginning of file */
+ if (dvi_file_size - current < 4 ||
+ current == 0 || !(ch == DVI_ID || ch == DVIV_ID)) {
+ MESG("DVI ID = %d\n", ch);
+ ERROR(invalid_signature);
+ }
+
+ /* Make sure post_post is really there */
+ current = current - 5;
+ seek_absolute(dvi_file, current);
+ if ((ch = fgetc(dvi_file)) != POST_POST) {
+ MESG("Found %d where post_post opcode should be\n", ch);
+ ERROR(invalid_signature);
+ }
+ current = get_signed_quad(dvi_file);
+ seek_absolute(dvi_file, current);
+ if ((ch = fgetc(dvi_file)) != POST) {
+ MESG("Found %d where post_post opcode should be\n", ch);
+ ERROR(invalid_signature);
+ }
+
+ return current;
+}
+
+static void
+get_page_info (long post_location)
+{
+ int i;
+
+ seek_absolute(dvi_file, post_location + 27);
+ num_pages = get_unsigned_pair(dvi_file);
+ if (num_pages == 0) {
+ ERROR("Page count is 0!");
+ }
+ if (verbose > 2) {
+ MESG("Page count:\t %4d\n", num_pages);
+ }
+
+ page_loc = NEW(num_pages, unsigned long);
+
+ seek_absolute(dvi_file, post_location + 1);
+ page_loc[num_pages-1] = get_unsigned_quad(dvi_file);
+ range_check_loc(page_loc[num_pages-1] + 41);
+ for (i = num_pages - 2; i >= 0; i--) {
+ seek_absolute(dvi_file, page_loc[i+1] + 41);
+ page_loc[i] = get_unsigned_quad(dvi_file);
+ range_check_loc(page_loc[num_pages-1] + 41);
+ }
+}
+
+/* Following are computed "constants" used for unit conversion */
+static double dvi2pts = 1.52018, total_mag = 1.0;
+
+double
+dvi_tell_mag (void)
+{
+ return total_mag;
+}
+
+static void
+do_scales (double mag)
+{
+ total_mag = (double) dvi_info.mag / 1000.0 * mag;
+ dvi2pts = (double) dvi_info.unit_num / (double) dvi_info.unit_den;
+ dvi2pts *= (72.0 / 254000.0);
+}
+
+static void
+get_dvi_info (long post_location)
+{
+ seek_absolute(dvi_file, post_location + 5);
+
+ dvi_info.unit_num = get_unsigned_quad(dvi_file);
+ dvi_info.unit_den = get_unsigned_quad(dvi_file);
+ dvi_info.mag = get_unsigned_quad(dvi_file);
+
+ dvi_info.media_height = get_unsigned_quad(dvi_file);
+ dvi_info.media_width = get_unsigned_quad(dvi_file);
+
+ dvi_info.stackdepth = get_unsigned_pair(dvi_file);
+
+ if (dvi_info.stackdepth > DVI_STACK_DEPTH_MAX) {
+ WARN("DVI need stack depth of %d,", dvi_info.stackdepth);
+ WARN("but DVI_STACK_DEPTH_MAX is %d.", DVI_STACK_DEPTH_MAX);
+ ERROR("Capacity exceeded.");
+ }
+
+ if (verbose > 2) {
+ MESG("DVI File Info\n");
+ MESG("Unit: %ld / %ld\n", dvi_info.unit_num, dvi_info.unit_den);
+ MESG("Magnification: %ld\n", dvi_info.mag);
+ MESG("Media Height: %ld\n", dvi_info.media_height);
+ MESG("Media Width: %ld\n", dvi_info.media_width);
+ MESG("Stack Depth: %d\n", dvi_info.stackdepth);
+ }
+}
+
+const char *
+dvi_comment (void)
+{
+ return dvi_info.comment;
+}
+
+static void
+read_font_record (SIGNED_QUAD tex_id)
+{
+ UNSIGNED_BYTE dir_length, name_length;
+ UNSIGNED_QUAD point_size, design_size;
+ char *directory, *font_name;
+
+ if (num_def_fonts >= max_def_fonts) {
+ max_def_fonts += TEX_FONTS_ALLOC_SIZE;
+ def_fonts = RENEW (def_fonts, max_def_fonts, struct font_def);
+ }
+ get_unsigned_quad(dvi_file);
+ point_size = get_unsigned_quad(dvi_file);
+ design_size = get_unsigned_quad(dvi_file);
+ dir_length = get_unsigned_byte(dvi_file);
+ name_length = get_unsigned_byte(dvi_file);
+
+ directory = NEW(dir_length + 1, char);
+ if (fread(directory, 1, dir_length, dvi_file) != dir_length) {
+ ERROR(invalid_signature);
+ }
+ directory[dir_length] = '\0';
+ RELEASE(directory); /* unused */
+
+ font_name = NEW(name_length + 1, char);
+ if (fread(font_name, 1, name_length, dvi_file) != name_length) {
+ ERROR(invalid_signature);
+ }
+ font_name[name_length] = '\0';
+ def_fonts[num_def_fonts].tex_id = tex_id;
+ def_fonts[num_def_fonts].font_name = font_name;
+ def_fonts[num_def_fonts].point_size = point_size;
+ def_fonts[num_def_fonts].design_size = design_size;
+ def_fonts[num_def_fonts].used = 0;
+ num_def_fonts++;
+
+ return;
+}
+
+static void
+get_dvi_fonts (long post_location)
+{
+ UNSIGNED_BYTE code;
+ SIGNED_QUAD tex_id = 0;
+
+ seek_absolute(dvi_file, post_location + 29);
+ while ((code = get_unsigned_byte(dvi_file)) != POST_POST) {
+ switch (code) {
+ case FNT_DEF1:
+ tex_id = get_unsigned_byte(dvi_file);
+ break;
+ case FNT_DEF2:
+ tex_id = get_unsigned_pair(dvi_file);
+ break;
+ case FNT_DEF3:
+ tex_id = get_unsigned_triple(dvi_file);
+ break;
+ case FNT_DEF4:
+ tex_id = get_signed_quad(dvi_file);
+ break;
+ default:
+ MESG("Unexpected op code: %3d\n", code);
+ ERROR(invalid_signature);
+ }
+ read_font_record(tex_id);
+ }
+ if (verbose > 2) {
+ unsigned i;
+
+ MESG("\n");
+ MESG("DVI file font info\n");
+ for (i = 0; i < num_def_fonts; i++) {
+ MESG("TeX Font: %10s loaded at ID=%5ld, ",
+ def_fonts[i].font_name, def_fonts[i].tex_id);
+ MESG("size=%5.2fpt (scaled %4.1f%%)",
+ def_fonts[i].point_size * dvi2pts,
+ 100.0 * ((double) def_fonts[i].point_size / def_fonts[i].design_size));
+ MESG("\n");
+ }
+ }
+}
+
+static void get_comment (void)
+{
+ UNSIGNED_BYTE length;
+
+ seek_absolute(dvi_file, 14);
+ length = get_unsigned_byte(dvi_file);
+ if (fread(dvi_info.comment,
+ 1, length, dvi_file) != length) {
+ ERROR(invalid_signature);
+ }
+ dvi_info.comment[length] = '\0';
+ if (verbose) {
+ MESG("DVI Comment: %s\n", dvi_info.comment);
+ }
+}
+
+/*
+ * The section below this line deals with the actual processing of the
+ * dvi file.
+ *
+ * The dvi file processor state is contained in the following variables:
+ */
+
+struct dvi_registers
+{
+ SIGNED_QUAD h, v, w, x, y, z, d;
+};
+
+static struct dvi_registers dvi_state;
+static struct dvi_registers dvi_stack[DVI_STACK_DEPTH_MAX];
+static unsigned dvi_stack_depth = 0 ;
+static int current_font = -1;
+static int processing_page = 0 ;
+
+static void
+clear_state (void)
+{
+ dvi_state.h = 0; dvi_state.v = 0; dvi_state.w = 0;
+ dvi_state.x = 0; dvi_state.y = 0; dvi_state.z = 0;
+ dvi_state.d = 0; /* direction */
+ dvi_stack_depth = 0;
+ current_font = -1;
+}
+
+/* Migrated from pdfdev.c:
+ * The following codes are originally put into pdfdev.c.
+ * But they are moved to here to make PDF output independent
+ * from DVI input.
+ * pdfdoc, pdfspecial and htex are also modified. pdfspecial
+ * and htex does tag/untag depth. pdfdev and pdfdoc now does
+ * not care about line-breaking at all.
+ */
+static unsigned marked_depth = 0;
+static int tagged_depth = -1;
+
+static void
+dvi_mark_depth (void)
+{
+ /* If decreasing below tagged_depth */
+ if (link_annot &&
+ marked_depth == tagged_depth &&
+ dvi_stack_depth == tagged_depth - 1) {
+ /*
+ * See if this appears to be the end of a "logical unit"
+ * that's been broken. If so, flush the logical unit.
+ */
+ pdf_doc_break_annot();
+ }
+ marked_depth = dvi_stack_depth;
+}
+
+/*
+ * The following routines setup and tear down a callback at a
+ * certain stack depth. This is used to handle broken (linewise)
+ * links.
+ */
+void
+dvi_tag_depth (void)
+{
+ tagged_depth = marked_depth;
+ dvi_compute_boxes(1);
+}
+
+void
+dvi_untag_depth (void)
+{
+ tagged_depth = -1;
+ dvi_compute_boxes(0);
+}
+
+void
+dvi_compute_boxes (int flag)
+{
+ compute_boxes = flag;
+}
+
+void
+dvi_link_annot (int flag)
+{
+ link_annot = flag;
+}
+
+void
+dvi_do_special (const void *buffer, UNSIGNED_QUAD size)
+{
+ double x_user, y_user, mag;
+ const char *p;
+
+ if (size > 0x7fffffffUL) {
+ WARN("Special more than %ul bytes???", size);
+ return;
+ }
+
+ graphics_mode();
+
+ p = (const char *) buffer;
+
+ x_user = dvi_state.h * dvi2pts;
+ y_user = -dvi_state.v * dvi2pts;
+ mag = dvi_tell_mag();
+
+ if (spc_exec_special(p, (long) size, x_user, y_user, mag) < 0) {
+ if (verbose) {
+ dump(p, p + size);
+ }
+ }
+
+ return;
+}
+
+#if 0
+double
+dvi_unit_size (void)
+{
+ return dvi2pts;
+}
+#endif
+
+
+int
+dvi_locate_font (const char *tfm_name, spt_t ptsize)
+{
+ int cur_id = -1;
+ const char *name = tfm_name;
+ int subfont_id = -1, font_id; /* VF or device font ID */
+ fontmap_rec *mrec;
+
+ if (verbose)
+ MESG("<%s@%.2fpt", tfm_name, ptsize * dvi2pts);
+
+ need_more_fonts(1);
+
+ /* This routine needs to be recursive/reentrant. Load current high water
+ * mark into an automatic variable.
+ */
+ cur_id = num_loaded_fonts++;
+
+ mrec = pdf_lookup_fontmap_record(tfm_name);
+ /* Load subfont mapping table */
+ if (mrec && mrec->charmap.sfd_name && mrec->charmap.subfont_id) {
+ subfont_id = sfd_load_record(mrec->charmap.sfd_name, mrec->charmap.subfont_id);
+ }
+
+ /* TFM must exist here. */
+ loaded_fonts[cur_id].tfm_id = tfm_open(tfm_name, 1);
+ loaded_fonts[cur_id].subfont_id = subfont_id;
+ loaded_fonts[cur_id].size = ptsize;
+ /* This will be reset later if it was really generated by the dvi file. */
+ loaded_fonts[cur_id].source = VF;
+
+ /* The order of searching fonts is as follows:
+ *
+ * 1. If mrec is null, that is, there is no map entry matching
+ * with tfm_name, then search a virtual font matching with
+ * tfm_name at first. If no virtual font is found, search a
+ * PK font matching with tfm_name.
+ *
+ * 2. If mrec is non-null, search a physical scalable font.
+ *
+ * 3. Notice that every subfont gets non-null mrec. In this case,
+ * enc_name corresponding to mrec will be used instead of mrec.
+ * That is enc_name is NULL, search a virtual font for Omega (.ovf)
+ * matching with the base name of the subfont. If no virtual font
+ * for Omega is found, it is a fatal error because there is no PK font
+ * for Omega.
+ */
+ if (!mrec) {
+ font_id = vf_locate_font(tfm_name, ptsize);
+ if (font_id >= 0) {
+ loaded_fonts[cur_id].type = VIRTUAL;
+ loaded_fonts[cur_id].font_id = font_id;
+ if (verbose)
+ MESG("(VF)>");
+ return cur_id;
+ }
+ }
+#if 1
+ /* Sorry, I don't understand this well... Please fix.
+ * The purpose of this seems to be:
+ *
+ * Map 8-bit char codes in subfont to 16-bit code with SFD mapping
+ * and map subfonts to single OVF font.
+ *
+ * But it apparently only does TFM -> OVF mapping but no character
+ * code mapping. Please see dvi_set(), you can't have both font->type
+ * VIRTUAL and font->subfont_id >= 0. Am I missing something?
+ */
+ else if (subfont_id >= 0 && mrec->map_name)
+ {
+ fontmap_rec *mrec1 = pdf_lookup_fontmap_record(mrec->map_name);
+ /* enc_name=NULL should be used only for 'built-in' encoding.
+ * Please fix this!
+ */
+ if (mrec1 && !mrec1->enc_name) {
+ font_id = vf_locate_font(mrec1->font_name, ptsize);
+ if (font_id < 0)
+ WARN("Could not locate Omega Virtual Font \"%s\" for \"%s\".",
+ mrec1->font_name, tfm_name);
+ else {
+ loaded_fonts[cur_id].type = VIRTUAL;
+ loaded_fonts[cur_id].font_id = font_id;
+ if (verbose)
+ MESG("(OVF)>");
+ return cur_id;
+ }
+ }
+ }
+#endif /* 1 */
+
+ /* Failed to load a virtual font so we try to load a physical font. */
+
+ /* If mrec->map_name is not NULL, font name identified in PDF output
+ * is different than tfm_name, this can happen for subfonts grouped
+ * into a single "intermediate" font foo@SFD@.
+ * This is necessary for optimal output; to avoid unnecessary creation
+ * of multiple instances of a same font, to avoid frequent font selection
+ * and break of string_mode.
+ */
+ if (mrec && mrec->map_name) {
+ name = mrec->map_name;
+ } else {
+ name = tfm_name;
+ }
+
+ /* We need ptsize for PK font creation. */
+ font_id = pdf_dev_locate_font(name, ptsize);
+ if (font_id < 0) {
+ WARN("Could not locate a virtual/physical font for TFM \"%s\".", tfm_name);
+ if (mrec && mrec->map_name) { /* has map_name */
+ fontmap_rec *mrec1 = pdf_lookup_fontmap_record(mrec->map_name);
+ WARN(">> This font is mapped to an intermediate 16-bit font \"%s\" with SFD charmap=<%s,%s>,",
+ mrec->map_name, mrec->charmap.sfd_name, mrec->charmap.subfont_id);
+ if (!mrec1)
+ WARN(">> but I couldn't find font mapping for \"%s\".", mrec->map_name);
+ else {
+ WARN(">> and then mapped to a physical font \"%s\" by fontmap.", mrec1->font_name);
+ WARN(">> Please check if kpathsea library can find this font: %s", mrec1->font_name);
+ }
+ } else if (mrec && !mrec->map_name) {
+ WARN(">> This font is mapped to a physical font \"%s\".", mrec->font_name);
+ WARN(">> Please check if kpathsea library can find this font: %s", mrec->font_name);
+ } else {
+ WARN(">> There are no valid font mapping entry for this font.");
+ WARN(">> Font file name \"%s\" was assumed but failed to locate that font.", tfm_name);
+ }
+ ERROR("Cannot proceed without .vf or \"physical\" font for PDF output...");
+ }
+ loaded_fonts[cur_id].type = PHYSICAL;
+ loaded_fonts[cur_id].font_id = font_id;
+
+ if (verbose)
+ MESG(">");
+
+ return cur_id;
+}
+
+double
+dvi_dev_xpos (void)
+{
+ return dvi_state.h * dvi2pts;
+}
+
+double
+dvi_dev_ypos (void)
+{
+ return -(dvi_state.v * dvi2pts);
+}
+
+static void do_moveto (SIGNED_QUAD x, SIGNED_QUAD y)
+{
+ dvi_state.h = x;
+ dvi_state.v = y;
+}
+
+void dvi_right (SIGNED_QUAD x)
+{
+ switch (dvi_state.d) {
+ case 0:
+ dvi_state.h += x; break;
+ case 1:
+ dvi_state.v += x; break;
+ case 3:
+ dvi_state.v -= x; break;
+ }
+}
+
+void dvi_down (SIGNED_QUAD y)
+{
+ switch (dvi_state.d) {
+ case 0:
+ dvi_state.v += y; break;
+ case 1:
+ dvi_state.h -= y; break;
+ case 3:
+ dvi_state.h += y; break;
+ }
+}
+
+/* Please remove this.
+ * Optimization for 8-bit encodings.
+ */
+static void
+do_string (unsigned char *s, int len)
+{
+ struct loaded_font *font;
+ spt_t width, height, depth;
+ int i;
+
+ if (current_font < 0)
+ ERROR("No font selected!");
+
+ font = &loaded_fonts[current_font];
+
+ width = tfm_string_width(font->tfm_id, s, len);
+ width = sqxfw(font->size, width);
+
+ switch (font->type) {
+ case PHYSICAL:
+ if (font->subfont_id < 0) {
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, s, len,
+ width, font->font_id, 1);
+ if (compute_boxes && link_annot &&
+ marked_depth >= tagged_depth) {
+ pdf_rect rect;
+
+ height = tfm_string_height(font->tfm_id, s, len);
+ depth = tfm_string_depth (font->tfm_id, s, len);
+ height = sqxfw(font->size, height);
+ depth = sqxfw(font->size, depth);
+
+ pdf_dev_set_rect (&rect, dvi_state.h, -dvi_state.v,
+ width, height, depth);
+ pdf_doc_expand_box(&rect);
+ }
+ } else { /* Subfonts */
+ dvi_push();
+ for (i = 0; i < len; i++) {
+ dvi_set(s[i]);
+ }
+ dvi_pop();
+ }
+ break;
+ case VIRTUAL:
+ dvi_push();
+ for (i = 0; i < len; i++) {
+ dvi_set(s[i]);
+ }
+ dvi_pop();
+ }
+ switch (dvi_state.d) {
+ case 0:
+ dvi_state.h += width; break;
+ case 1:
+ dvi_state.v += width; break;
+ case 3:
+ dvi_state.v -= width; break;
+ }
+}
+
+/* _FIXME_
+ * CMap decoder wants multibyte strings as input but
+ * how DVI char codes are converted to multibyte sting
+ * is not clear.
+ */
+void
+dvi_set (SIGNED_QUAD ch)
+{
+ struct loaded_font *font;
+ spt_t width, height, depth;
+ unsigned char wbuf[4];
+
+ if (current_font < 0) {
+ ERROR("No font selected!");
+ }
+ /* The division by dvi2pts seems strange since we actually know the
+ * "dvi" size of the fonts contained in the DVI file. In other
+ * words, we converted from DVI units to pts and back again!
+ * The problem comes from fonts defined in VF files where we don't know
+ * the DVI size. It's keeping me sane to keep *point sizes* of *all*
+ * fonts in the dev.c file and convert them back if necessary.
+ */
+ font = &loaded_fonts[current_font];
+
+ width = tfm_get_fw_width(font->tfm_id, ch);
+ width = sqxfw(font->size, width);
+
+ switch (font->type) {
+ case PHYSICAL:
+ if (ch > 65535) { /* _FIXME_ */
+ wbuf[0] = (UTF32toUTF16HS(ch) >> 8) & 0xff;
+ wbuf[1] = UTF32toUTF16HS(ch) & 0xff;
+ wbuf[2] = (UTF32toUTF16LS(ch) >> 8) & 0xff;
+ wbuf[3] = UTF32toUTF16LS(ch) & 0xff;
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 4,
+ width, font->font_id, 2);
+ } else if (ch > 255) { /* _FIXME_ */
+ wbuf[0] = (ch >> 8) & 0xff;
+ wbuf[1] = ch & 0xff;
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 2,
+ width, font->font_id, 2);
+ } else if (font->subfont_id >= 0) {
+ unsigned short uch = lookup_sfd_record(font->subfont_id, (unsigned char) ch);
+ wbuf[0] = (uch >> 8) & 0xff;
+ wbuf[1] = uch & 0xff;
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 2,
+ width, font->font_id, 2);
+ } else {
+ wbuf[0] = (unsigned char) ch;
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 1,
+ width, font->font_id, 1);
+ }
+ if (compute_boxes && link_annot &&
+ marked_depth >= tagged_depth) {
+ pdf_rect rect;
+
+ height = tfm_get_fw_height(font->tfm_id, ch);
+ depth = tfm_get_fw_depth (font->tfm_id, ch);
+ height = sqxfw(font->size, height);
+ depth = sqxfw(font->size, depth);
+
+ pdf_dev_set_rect (&rect, dvi_state.h, -dvi_state.v,
+ width, height, depth);
+ pdf_doc_expand_box(&rect);
+ }
+ break;
+ case VIRTUAL:
+#if 0
+ /* See comment in locate_font() */
+ if (font->subfont_id >= 0)
+ ch = lookup_sfd_record(font->subfont_id, (unsigned char) ch);
+#endif /* 0 */
+ vf_set_char(ch, font->font_id); /* push/pop invoked */
+ break;
+ }
+ switch (dvi_state.d) {
+ case 0:
+ dvi_state.h += width; break;
+ case 1:
+ dvi_state.v += width; break;
+ case 3:
+ dvi_state.v -= width; break;
+ }
+}
+
+void
+dvi_put (SIGNED_QUAD ch)
+{
+ struct loaded_font *font;
+ spt_t width, height, depth;
+ unsigned char wbuf[4];
+
+ if (current_font < 0) {
+ ERROR("No font selected!");
+ }
+
+ font = &loaded_fonts[current_font];
+
+ switch (font->type) {
+ case PHYSICAL:
+ width = tfm_get_fw_width(font->tfm_id, ch);
+ width = sqxfw(font->size, width);
+
+ /* Treat a single character as a one byte string and use the
+ * string routine.
+ */
+ if (ch > 65535) { /* _FIXME_ */
+ wbuf[0] = (UTF32toUTF16HS(ch) >> 8) & 0xff;
+ wbuf[1] = UTF32toUTF16HS(ch) & 0xff;
+ wbuf[2] = (UTF32toUTF16LS(ch) >> 8) & 0xff;
+ wbuf[3] = UTF32toUTF16LS(ch) & 0xff;
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 4,
+ width, font->font_id, 2);
+ } else if (ch > 255) { /* _FIXME_ */
+ wbuf[0] = (ch >> 8) & 0xff;
+ wbuf[1] = ch & 0xff;
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 2,
+ width, font->font_id, 2);
+ } else if (font->subfont_id >= 0) {
+ unsigned int uch;
+
+ uch = lookup_sfd_record(font->subfont_id, (unsigned char) ch);
+ wbuf[0] = (uch >> 8) & 0xff;
+ wbuf[1] = uch & 0xff;
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 2,
+ width, font->font_id, 2);
+ } else {
+ wbuf[0] = (unsigned char) ch;
+ pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 1,
+ width, font->font_id, 1);
+ }
+ if (compute_boxes && link_annot &&
+ marked_depth >= tagged_depth) {
+ pdf_rect rect;
+
+ height = tfm_get_fw_height(font->tfm_id, ch);
+ depth = tfm_get_fw_depth (font->tfm_id, ch);
+ height = sqxfw(font->size, height);
+ depth = sqxfw(font->size, depth);
+
+ pdf_dev_set_rect (&rect, dvi_state.h, -dvi_state.v,
+ width, height, depth);
+ pdf_doc_expand_box(&rect);
+ }
+ break;
+ case VIRTUAL:
+#if 0
+ /* See comment in locate_font() */
+ if (font->subfont_id >= 0)
+ ch = lookup_sfd_record(font->subfont_id, (unsigned char) ch);
+#endif /* 0 */
+ vf_set_char(ch, font->font_id);
+ break;
+ }
+
+ return;
+}
+
+
+void
+dvi_rule (SIGNED_QUAD width, SIGNED_QUAD height)
+{
+ do_moveto(dvi_state.h, dvi_state.v);
+
+ switch (dvi_state.d) {
+ case 0:
+ pdf_dev_set_rule(dvi_state.h, -dvi_state.v, width, height);
+ break;
+ case 1:
+ pdf_dev_set_rule(dvi_state.h, -dvi_state.v - width, height, width);
+ break;
+ case 3:
+ pdf_dev_set_rule(dvi_state.h - height, -dvi_state.v , height, width);
+ break;
+ }
+}
+
+void
+dvi_dir (UNSIGNED_BYTE dir) /* how? */
+{
+ fprintf(stderr, " > dvi_dir %d\n", dir);
+ dvi_state.d = dir;
+ pdf_dev_set_dirmode(dvi_state.d); /* 0: horizontal, 1: vertical */
+}
+
+static void
+do_set1 (void)
+{
+ dvi_set(get_unsigned_byte(dvi_file));
+}
+
+static void
+do_set2 (void)
+{
+ dvi_set(get_unsigned_pair(dvi_file));
+}
+
+static void
+do_set3 (void)
+{
+ dvi_set(get_unsigned_triple(dvi_file));
+}
+
+static void
+do_setrule (void)
+{
+ SIGNED_QUAD width, height;
+
+ height = get_signed_quad(dvi_file);
+ width = get_signed_quad(dvi_file);
+ if (width > 0 && height > 0) {
+ dvi_rule(width, height);
+ }
+ dvi_right(width);
+}
+
+static void
+do_putrule (void)
+{
+ SIGNED_QUAD width, height;
+
+ height = get_signed_quad (dvi_file);
+ width = get_signed_quad (dvi_file);
+ if (width > 0 && height > 0) {
+ dvi_rule(width, height);
+ }
+}
+
+static void
+do_put1 (void)
+{
+ dvi_put(get_unsigned_byte(dvi_file));
+}
+
+static void
+do_put2 (void)
+{
+ dvi_put(get_unsigned_pair(dvi_file));
+}
+
+static void
+do_put3 (void)
+{
+ dvi_put(get_unsigned_triple(dvi_file));
+}
+
+void
+dvi_push (void)
+{
+ if (dvi_stack_depth >= DVI_STACK_DEPTH_MAX)
+ ERROR("DVI stack exceeded limit.");
+
+ dvi_stack[dvi_stack_depth++] = dvi_state;
+}
+
+void
+dvi_pop (void)
+{
+ if (dvi_stack_depth <= 0)
+ ERROR ("Tried to pop an empty stack.");
+
+ dvi_state = dvi_stack[--dvi_stack_depth];
+ do_moveto(dvi_state.h, dvi_state.v);
+ pdf_dev_set_dirmode(dvi_state.d); /* 0: horizontal, 1: vertical */
+}
+
+
+static void
+do_right1 (void)
+{
+ dvi_right(get_signed_byte(dvi_file));
+}
+
+static void
+do_right2 (void)
+{
+ dvi_right(get_signed_pair(dvi_file));
+}
+
+static void
+do_right3 (void)
+{
+ dvi_right(get_signed_triple(dvi_file));
+}
+
+static void
+do_right4 (void)
+{
+ dvi_right(get_signed_quad(dvi_file));
+}
+
+void
+dvi_w (SIGNED_QUAD ch)
+{
+ dvi_state.w = ch;
+ dvi_right(ch);
+}
+
+void
+dvi_w0 (void)
+{
+ dvi_right(dvi_state.w);
+}
+
+static void
+do_w1 (void)
+{
+ dvi_w(get_signed_byte(dvi_file));
+}
+
+static void
+do_w2 (void)
+{
+ dvi_w(get_signed_pair(dvi_file));
+}
+
+static void
+do_w3 (void)
+{
+ dvi_w(get_signed_triple(dvi_file));
+}
+
+static void
+do_w4 (void)
+{
+ dvi_w(get_signed_quad(dvi_file));
+}
+
+void
+dvi_x (SIGNED_QUAD ch)
+{
+ dvi_state.x = ch;
+ dvi_right(ch);
+}
+
+void
+dvi_x0 (void)
+{
+ dvi_right(dvi_state.x);
+}
+
+static void
+do_x1 (void)
+{
+ dvi_x(get_signed_byte(dvi_file));
+}
+
+static void
+do_x2 (void)
+{
+ dvi_x(get_signed_pair(dvi_file));
+}
+
+static void
+do_x3 (void)
+{
+ dvi_x(get_signed_triple(dvi_file));
+}
+
+static void
+do_x4 (void)
+{
+ dvi_x(get_signed_quad(dvi_file));
+}
+
+static void
+do_down1 (void)
+{
+ dvi_down(get_signed_byte(dvi_file));
+}
+
+static void
+do_down2 (void)
+{
+ dvi_down(get_signed_pair(dvi_file));
+}
+
+static void
+do_down3 (void)
+{
+ dvi_down(get_signed_triple(dvi_file));
+}
+
+static void
+do_down4 (void)
+{
+ dvi_down(get_signed_quad(dvi_file));
+}
+
+void
+dvi_y (SIGNED_QUAD ch)
+{
+ dvi_state.y = ch;
+ dvi_down(ch);
+}
+
+void
+dvi_y0 (void)
+{
+ dvi_down(dvi_state.y);
+}
+
+static
+void do_y1 (void)
+{
+ dvi_y(get_signed_byte(dvi_file));
+}
+
+static
+void do_y2 (void)
+{
+ dvi_y(get_signed_pair(dvi_file));
+}
+
+static
+void do_y3 (void)
+{
+ dvi_y(get_signed_triple(dvi_file));
+}
+
+static
+void do_y4 (void)
+{
+ dvi_y(get_signed_quad(dvi_file));
+}
+
+void
+dvi_z (SIGNED_QUAD ch)
+{
+ dvi_state.z = ch;
+ dvi_down(ch);
+}
+
+void
+dvi_z0 (void)
+{
+ dvi_down(dvi_state.z);
+}
+
+static void
+do_z1 (void)
+{
+ dvi_z(get_signed_byte(dvi_file));
+}
+
+static void
+do_z2 (void)
+{
+ dvi_z(get_signed_pair(dvi_file));
+}
+
+static void
+do_z3 (void)
+{
+ dvi_z(get_signed_triple(dvi_file));
+}
+
+static void
+do_z4 (void)
+{
+ dvi_z(get_signed_quad(dvi_file));
+}
+
+static void
+do_fntdef (void)
+{
+ int area_len, name_len, i;
+
+ get_signed_quad(dvi_file);
+ get_signed_quad(dvi_file);
+ get_signed_quad(dvi_file);
+ area_len = get_unsigned_byte(dvi_file);
+ name_len = get_unsigned_byte(dvi_file);
+ for (i = 0; i < area_len + name_len; i++) {
+ get_unsigned_byte(dvi_file);
+ }
+}
+
+static void
+do_fntdef1 (void)
+{
+ get_unsigned_byte(dvi_file);
+ do_fntdef();
+}
+
+static void
+do_fntdef2 (void)
+{
+ get_unsigned_pair(dvi_file);
+ do_fntdef();
+}
+
+static void
+do_fntdef3 (void)
+{
+ get_unsigned_triple(dvi_file);
+ do_fntdef();
+}
+
+static void
+do_fntdef4 (void)
+{
+ get_signed_quad(dvi_file);
+ do_fntdef();
+}
+
+void
+dvi_set_font (int font_id)
+{
+ current_font = font_id;
+}
+
+static void
+do_fnt (SIGNED_QUAD tex_id)
+{
+ int i;
+
+ for (i = 0; i < num_def_fonts; i++) {
+ if (def_fonts[i].tex_id == tex_id)
+ break;
+ }
+
+ if (i == num_def_fonts) {
+ ERROR("Tried to select a font that hasn't been defined: id=%ld", tex_id);
+ }
+
+ if (!def_fonts[i].used) {
+ int font_id;
+
+ font_id = dvi_locate_font(def_fonts[i].font_name, def_fonts[i].point_size);
+ loaded_fonts[font_id].source = DVI;
+ def_fonts[i].used = 1;
+ def_fonts[i].font_id = font_id;
+ }
+ current_font = def_fonts[i].font_id;
+}
+
+static void
+do_fnt1 (void)
+{
+ SIGNED_QUAD tex_id;
+
+ tex_id = get_unsigned_byte(dvi_file);
+ do_fnt(tex_id);
+}
+
+static void
+do_fnt2 (void)
+{
+ SIGNED_QUAD tex_id;
+
+ tex_id = get_unsigned_pair(dvi_file);
+ do_fnt(tex_id);
+}
+
+static void
+do_fnt3 (void)
+{
+ SIGNED_QUAD tex_id;
+
+ tex_id = get_unsigned_triple(dvi_file);
+ do_fnt(tex_id);
+}
+
+static void
+do_fnt4 (void)
+{
+ SIGNED_QUAD tex_id;
+
+ tex_id = get_signed_quad(dvi_file);
+ do_fnt(tex_id);
+}
+
+static void
+do_xxx (UNSIGNED_QUAD size)
+{
+ UNSIGNED_QUAD i;
+ Ubyte *buffer;
+
+ buffer = NEW(size+1, Ubyte);
+ for (i = 0; i < size; i++) {
+ buffer[i] = get_unsigned_byte(dvi_file);
+ }
+ dvi_do_special(buffer, size);
+ RELEASE(buffer);
+}
+
+static void
+do_xxx1 (void)
+{
+ SIGNED_QUAD size;
+
+ size = get_unsigned_byte(dvi_file);
+ do_xxx(size);
+}
+
+static void
+do_xxx2 (void)
+{
+ SIGNED_QUAD size;
+
+ size = get_unsigned_pair(dvi_file);
+ do_xxx(size);
+}
+
+static void
+do_xxx3 (void)
+{
+ SIGNED_QUAD size;
+
+ size = get_unsigned_triple(dvi_file);
+ do_xxx(size);
+}
+
+static void
+do_xxx4 (void)
+{
+ SIGNED_QUAD size;
+
+ size = get_unsigned_quad(dvi_file);
+ do_xxx(size);
+}
+
+static void
+do_bop (void)
+{
+ int i;
+
+ if (processing_page)
+ ERROR("Got a bop in the middle of a page!");
+
+ /* For now, ignore TeX's count registers */
+ for (i = 0; i < 10; i++) {
+ get_signed_quad(dvi_file);
+ }
+ /* Ignore previous page pointer since we have already
+ * saved this information
+ */
+ get_signed_quad(dvi_file);
+ clear_state();
+ processing_page = 1;
+
+ pdf_doc_begin_page(dvi_tell_mag(), dev_origin_x, dev_origin_y);
+ spc_exec_at_begin_page();
+
+ return;
+}
+
+static void
+do_eop (void)
+{
+ processing_page = 0;
+
+ if (dvi_stack_depth != 0) {
+ ERROR("DVI stack depth is not zero at end of page");
+ }
+ spc_exec_at_end_page();
+
+ pdf_doc_end_page();
+
+ return;
+}
+
+static void
+do_dir (void)
+{
+ dvi_state.d = get_unsigned_byte(dvi_file);
+ pdf_dev_set_dirmode(dvi_state.d); /* 0: horizontal, 1: vertical */
+}
+
+/* Note to be absolutely certain that the string escape buffer doesn't
+ * hit its limit, FORMAT_BUF_SIZE should set to 4 times S_BUFFER_SIZE
+ * in pdfobj.c. Is there any application that genenerate words with
+ * 1k characters?
+ */
+
+#define SBUF_SIZE 1024
+
+/* Most of the work of actually interpreting
+ * the dvi file is here.
+ */
+void
+dvi_do_page (unsigned n,
+ double paper_width, double paper_height,
+ double hmargin, double vmargin)
+{
+ unsigned char opcode;
+ unsigned char sbuf[SBUF_SIZE];
+ unsigned int slen = 0;
+
+ if (!page_loc || n >= num_pages)
+ ERROR("Tried to process non-existent page: %ld", n);
+
+ /* DVI coordinate */
+ dev_origin_x = hmargin;
+ dev_origin_y = paper_height - vmargin;
+
+ seek_absolute(dvi_file, page_loc[n]);
+
+ dvi_stack_depth = 0;
+ for (;;) {
+ /* The most likely opcodes are individual setchars.
+ * These are buffered for speed. */
+ slen = 0;
+ while ((opcode = fgetc(dvi_file)) <= SET_CHAR_127 &&
+ slen < SBUF_SIZE) {
+ sbuf[slen++] = opcode;
+ }
+ if (slen > 0) {
+ do_string(sbuf, slen);
+ }
+ if (slen == SBUF_SIZE)
+ continue;
+
+ /* If we are here, we have an opcode that is something
+ * other than SET_CHAR.
+ */
+ if (opcode >= FNT_NUM_0 && opcode <= FNT_NUM_63) {
+ do_fnt(opcode - FNT_NUM_0);
+ continue;
+ }
+
+ switch (opcode) {
+ case SET1: do_set1(); break;
+ case SET2: do_set2(); break;
+ case SET3: do_set3(); break;
+ case SET4:
+ ERROR("Multibyte (>24 bits) character not supported!");
+ break;
+
+ case SET_RULE:
+ do_setrule();
+ break;
+
+ case PUT1: do_put1(); break;
+ case PUT2: do_put2(); break;
+ case PUT3: do_put3(); break;
+ case PUT4:
+ ERROR ("Multibyte character (>24 bits) not supported!");
+ break;
+
+ case PUT_RULE:
+ do_putrule();
+ break;
+
+ case NOP:
+ break;
+
+ case BOP:
+ do_bop();
+ break;
+ case EOP:
+ do_eop();
+ return;
+ break;
+
+ case PUSH:
+ dvi_push();
+ /* The following line needs to go here instead of in
+ * dvi_push() since logical structure of document is
+ * oblivous to virtual fonts. For example the last line on a
+ * page could be at stack level 3 and the page footer should
+ * be at stack level 3. However, if the page footer contains
+ * virtual fonts (or other nested constructions), it could
+ * fool the link breaker into thinking it was a continuation
+ * of the link */
+ dvi_mark_depth();
+ break;
+ case POP:
+ dvi_pop();
+ /* Above explanation holds for following line too */
+ dvi_mark_depth();
+ break;
+
+ case RIGHT1: do_right1(); break;
+ case RIGHT2: do_right2(); break;
+ case RIGHT3: do_right3(); break;
+ case RIGHT4: do_right4(); break;
+
+ case W0: dvi_w0(); break;
+ case W1: do_w1 (); break;
+ case W2: do_w2 (); break;
+ case W3: do_w3 (); break;
+ case W4: do_w4 (); break;
+
+ case X0: dvi_x0(); break;
+ case X1: do_x1 (); break;
+ case X2: do_x2 (); break;
+ case X3: do_x3 (); break;
+ case X4: do_x4 (); break;
+
+ case DOWN1: do_down1(); break;
+ case DOWN2: do_down2(); break;
+ case DOWN3: do_down3(); break;
+ case DOWN4: do_down4(); break;
+
+ case Y0: dvi_y0(); break;
+ case Y1: do_y1 (); break;
+ case Y2: do_y2 (); break;
+ case Y3: do_y3 (); break;
+ case Y4: do_y4 (); break;
+
+ case Z0: dvi_z0(); break;
+ case Z1: do_z1 (); break;
+ case Z2: do_z2 (); break;
+ case Z3: do_z3 (); break;
+ case Z4: do_z4 (); break;
+
+ case FNT1: do_fnt1(); break;
+ case FNT2: do_fnt2(); break;
+ case FNT3: do_fnt3(); break;
+ case FNT4: do_fnt4(); break;
+
+ /* Specials */
+ case XXX1: do_xxx1(); break;
+ case XXX2: do_xxx2(); break;
+ case XXX3: do_xxx3(); break;
+ case XXX4: do_xxx4(); break;
+
+ /* Font definition - skipped. */
+ case FNT_DEF1: do_fntdef1(); break;
+ case FNT_DEF2: do_fntdef2(); break;
+ case FNT_DEF3: do_fntdef3(); break;
+ case FNT_DEF4: do_fntdef4(); break;
+
+ /* pTeX extension */
+ case PTEXDIR:
+ do_dir();
+ break;
+
+ case PRE: case POST: case POST_POST:
+ ERROR("Unexpected preamble or postamble in dvi file");
+ break;
+ default:
+ ERROR("Unexpected opcode or DVI file ended prematurely");
+ }
+ }
+}
+
+double
+dvi_init (const char *dvi_filename, double mag)
+{
+ long post_location;
+
+ dvi_file = MFOPEN(dvi_filename, FOPEN_RBIN_MODE);
+ if (!dvi_file) {
+ ERROR("Could not open specified DVI file: %s", dvi_filename);
+ return 0.0;
+ }
+
+ /* DVI files are most easily read backwards by
+ * searching for post_post and then post opcode.
+ */
+ post_location = find_post();
+ get_dvi_info(post_location);
+ do_scales(mag);
+ get_page_info(post_location);
+ get_comment();
+ get_dvi_fonts(post_location);
+ clear_state();
+
+ return dvi2pts;
+}
+
+void
+dvi_close (void)
+{
+ int i;
+
+ /* We add comment in dvi_close instead of dvi_init so user
+ * has a change to overwrite it. The docinfo dictionary is
+ * treated as a write-once record.
+ */
+
+ /* Do some house cleaning */
+ MFCLOSE(dvi_file);
+ dvi_file = NULL;
+
+ if (def_fonts) {
+ for (i = 0; i < num_def_fonts; i++) {
+ if (def_fonts[i].font_name)
+ RELEASE(def_fonts[i].font_name);
+ def_fonts[i].font_name = NULL;
+ }
+ RELEASE(def_fonts);
+ }
+ def_fonts = NULL;
+
+ if (page_loc)
+ RELEASE(page_loc);
+ page_loc = NULL;
+ num_pages = 0;
+
+ if (loaded_fonts)
+ RELEASE(loaded_fonts);
+ loaded_fonts = NULL;
+ num_loaded_fonts = 0;
+
+ vf_close_all_fonts();
+ tfm_close_all ();
+}
+
+/* The following are need to implement virtual fonts
+ According to documentation, the vf "subroutine"
+ must have state pushed and must have
+ w,v,y, and z set to zero. The current font
+ is determined by the virtual font header, which
+ may be undefined */
+
+static int saved_dvi_font[VF_NESTING_MAX];
+static int num_saved_fonts = 0;
+
+void
+dvi_vf_init (int dev_font_id)
+{
+ dvi_push();
+
+ dvi_state.w = 0; dvi_state.x = 0;
+ dvi_state.y = 0; dvi_state.z = 0;
+
+ /* do not reset dvi_state.d. */
+ if (num_saved_fonts < VF_NESTING_MAX) {
+ saved_dvi_font[num_saved_fonts++] = current_font;
+ } else
+ ERROR("Virtual fonts nested too deeply!");
+ current_font = dev_font_id;
+}
+
+/* After VF subroutine is finished, we simply pop the DVI stack */
+void
+dvi_vf_finish (void)
+{
+ dvi_pop();
+ if (num_saved_fonts > 0)
+ current_font = saved_dvi_font[--num_saved_fonts];
+ else {
+ ERROR("Tried to pop an empty font stack");
+ }
+}
+
+
+/* Scan various specials */
+#include "dpxutil.h"
+
+/* This need to allow 'true' prefix for unit and
+ * length value must be divided by current magnification.
+ */
+static int
+read_length (double *vp, double mag, const char **pp, const char *endptr)
+{
+ char *q;
+ const char *p = *pp;
+ double v, u = 1.0;
+ const char *_ukeys[] = {
+#define K_UNIT__PT 0
+#define K_UNIT__IN 1
+#define K_UNIT__CM 2
+#define K_UNIT__MM 3
+#define K_UNIT__BP 4
+ "pt", "in", "cm", "mm", "bp",
+ NULL
+ };
+ int k, error = 0;
+
+ q = parse_float_decimal(&p, endptr);
+ if (!q) {
+ *vp = 0.0; *pp = p;
+ return -1;
+ }
+
+ v = atof(q);
+ RELEASE(q);
+
+ q = parse_c_ident(&p, endptr);
+ if (q) {
+ char *qq = q;
+ if (strlen(q) > strlen("true") &&
+ !memcmp(q, "true", strlen("true"))) {
+ u /= mag != 0.0 ? mag : 1.0; /* inverse magnify */
+ q += strlen("true");
+ }
+ for (k = 0; _ukeys[k] && strcmp(_ukeys[k], q); k++);
+ switch (k) {
+ case K_UNIT__PT: u *= 72.0 / 72.27; break;
+ case K_UNIT__IN: u *= 72.0; break;
+ case K_UNIT__CM: u *= 72.0 / 2.54 ; break;
+ case K_UNIT__MM: u *= 72.0 / 25.4 ; break;
+ case K_UNIT__BP: u *= 1.0 ; break;
+ default:
+ WARN("Unknown unit of measure: %s", qq);
+ error = -1;
+ break;
+ }
+ RELEASE(qq);
+ }
+
+ *vp = v * u; *pp = p;
+ return error;
+}
+
+
+static int
+scan_special (double *wd, double *ht, double *xo, double *yo, char *lm,
+ unsigned *minorversion,
+ int *do_enc, unsigned *key_bits, unsigned *permission, char *owner_pw, char *user_pw,
+ const char *buf, UNSIGNED_QUAD size)
+{
+ char *q;
+ const char *p = buf, *endptr;
+ int ns_pdf = 0, error = 0;
+
+ endptr = p + size;
+
+ skip_white(&p, endptr);
+
+ q = parse_c_ident(&p, endptr);
+ if (q && !strcmp(q, "pdf")) {
+ skip_white(&p, endptr);
+ if (p < endptr && *p == ':') {
+ p++;
+ skip_white(&p, endptr);
+ RELEASE(q);
+ q = parse_c_ident(&p, endptr); ns_pdf = 1;
+ }
+ }
+ skip_white(&p, endptr);
+
+ if (q) {
+ if (!strcmp(q, "landscape")) {
+ *lm = 1;
+ } else if (ns_pdf && !strcmp(q, "pagesize")) {
+ while (!error && p < endptr) {
+ char *kp = parse_c_ident(&p, endptr);
+ if (!kp)
+ break;
+ else {
+ skip_white(&p, endptr);
+ if (!strcmp(kp, "width")) {
+ error = read_length(wd, dvi_tell_mag(), &p, endptr);
+ if (!error)
+ *wd *= dvi_tell_mag();
+ } else if (!strcmp(kp, "height")) {
+ error = read_length(ht, dvi_tell_mag(), &p, endptr);
+ if (!error)
+ *ht *= dvi_tell_mag();
+ } else if (!strcmp(kp, "xoffset")) {
+ error = read_length(xo, dvi_tell_mag(), &p, endptr);
+ if (!error)
+ *xo *= dvi_tell_mag();
+ } else if (!strcmp(kp, "yoffset")) {
+ error = read_length(yo, dvi_tell_mag(), &p, endptr);
+ if (!error)
+ *yo *= dvi_tell_mag();
+ }
+ RELEASE(kp);
+ }
+ skip_white(&p, endptr);
+ }
+ } else if (!strcmp(q, "papersize")) {
+ char qchr = 0;
+ if (*p == '=') p++;
+ skip_white(&p, endptr);
+ if (p < endptr && (*p == '\'' || *p == '\"')) {
+ qchr = *p; p++;
+ skip_white(&p, endptr);
+ }
+ error = read_length(wd, 1.0, &p, endptr);
+ if (!error) {
+ skip_white(&p, endptr);
+ if (p < endptr && *p == ',') {
+ p++; skip_white(&p, endptr);
+ }
+ error = read_length(ht, 1.0, &p, endptr);
+ skip_white(&p, endptr);
+ }
+ if (!error && qchr) { /* Check if properly quoted */
+ if (p >= endptr || *p != qchr)
+ error = -1;
+ }
+ } else if (minorversion && ns_pdf && !strcmp(q, "minorversion")) {
+ char *kv;
+ if (*p == '=') p++;
+ skip_white(&p, endptr);
+ kv = parse_float_decimal(&p, endptr);
+ if (kv) {
+ *minorversion = (unsigned)strtol(kv, NULL, 10);
+ RELEASE(kv);
+ }
+ } else if (ns_pdf && !strcmp(q, "encrypt") && do_enc) {
+ *do_enc = 1;
+ *owner_pw = *user_pw = 0;
+ while (!error && p < endptr) {
+ char *kp = parse_c_ident(&p, endptr);
+ if (!kp)
+ break;
+ else {
+ pdf_obj *obj;
+ skip_white(&p, endptr);
+ if (!strcmp(kp, "ownerpw")) {
+ if ((obj = parse_pdf_string(&p, endptr))) {
+ strncpy(owner_pw, pdf_string_value(obj), MAX_PWD_LEN);
+ pdf_release_obj(obj);
+ } else
+ error = -1;
+ } else if (!strcmp(kp, "userpw")) {
+ if ((obj = parse_pdf_string(&p, endptr))) {
+ strncpy(user_pw, pdf_string_value(obj), MAX_PWD_LEN);
+ pdf_release_obj(obj);
+ } else
+ error = -1;
+ } else if (!strcmp(kp, "length")) {
+ if ((obj = parse_pdf_number(&p, endptr)) && PDF_OBJ_NUMBERTYPE(obj)) {
+ *key_bits = (unsigned) pdf_number_value(obj);
+ } else
+ error = -1;
+ if (obj)
+ pdf_release_obj(obj);
+ } else if (!strcmp(kp, "perm")) {
+ if ((obj = parse_pdf_number(&p, endptr)) && PDF_OBJ_NUMBERTYPE(obj)) {
+ *permission = (unsigned) pdf_number_value(obj);
+ } else
+ error = -1;
+ if (obj)
+ pdf_release_obj(obj);
+ } else
+ error = -1;
+ RELEASE(kp);
+ }
+ skip_white(&p, endptr);
+ }
+ }
+ RELEASE(q);
+ }
+
+ return error;
+}
+
+
+void
+dvi_scan_specials (unsigned page_no,
+ double *page_width, double *page_height,
+ double *x_offset, double *y_offset, char *landscape,
+ unsigned *minorversion,
+ int *do_enc, unsigned *key_bits, unsigned *permission, char *owner_pw, char *user_pw)
+{
+ FILE *fp = dvi_file;
+ long offset;
+ unsigned char opcode;
+
+ if (page_no >= num_pages)
+ ERROR("Invalid page number: %u", page_no);
+ offset = page_loc[page_no];
+
+ seek_absolute(fp, offset);
+ while ((opcode = fgetc(fp)) != EOP) {
+
+ if (opcode <= SET_CHAR_127 ||
+ (opcode >= FNT_NUM_0 && opcode <= FNT_NUM_63))
+ continue;
+ else if (opcode == XXX1 || opcode == XXX2 ||
+ opcode == XXX3 || opcode == XXX4) {
+ UNSIGNED_QUAD size = 0UL;
+ char buf[1024];
+ switch (opcode) {
+ case XXX1: size = get_unsigned_byte(fp); break;
+ case XXX2: size = get_unsigned_pair(fp); break;
+ case XXX3: size = get_unsigned_triple(fp); break;
+ case XXX4: size = get_unsigned_quad(fp); break;
+ }
+ size = MIN(size, 1024);
+ if (fread(buf, sizeof(char), size, fp) != size)
+ ERROR("Reading DVI file failed!");
+ if (scan_special(page_width, page_height, x_offset, y_offset, landscape,
+ minorversion, do_enc, key_bits, permission, owner_pw, user_pw, buf, size))
+ WARN("Reading special command failed: \"%.*s\"", size, buf);
+ continue;
+ }
+
+ /* Skipping... */
+ switch (opcode) {
+ case BOP:
+ seek_relative(fp, 44);
+ break;
+ case NOP: case PUSH: case POP:
+ case W0: case X0: case Y0: case Z0:
+ break;
+ case SET1: case PUT1: case RIGHT1: case DOWN1:
+ case W1: case X1: case Y1: case Z1: case FNT1:
+ get_unsigned_byte(fp);
+ break;
+
+ case SET2: case PUT2: case RIGHT2: case DOWN2:
+ case W2: case X2: case Y2: case Z2: case FNT2:
+ get_signed_pair(fp);
+ break;
+
+ case SET3: case PUT3: case RIGHT3: case DOWN3:
+ case W3: case X3: case Y3: case Z3: case FNT3:
+ get_signed_triple(fp);
+ break;
+
+ case SET4: case PUT4: case RIGHT4: case DOWN4:
+ case W4: case X4: case Y4: case Z4: case FNT4:
+ get_signed_quad(fp);
+ break;
+
+ case SET_RULE: case PUT_RULE:
+ seek_relative(fp, 8);
+ break;
+
+ case FNT_DEF1: do_fntdef1(); break;
+ case FNT_DEF2: do_fntdef2(); break;
+ case FNT_DEF3: do_fntdef3(); break;
+ case FNT_DEF4: do_fntdef4(); break;
+
+ case PTEXDIR:
+ get_unsigned_byte(fp);
+ break;
+
+ default: /* case PRE: case POST: case POST_POST: and others */
+ ERROR("Unexpected opcode %d at pos=0x%x", opcode, tell_position(fp));
+ break;
+ }
+ }
+
+ return;
+}
+