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Diffstat (limited to 'Build/source/libs/potrace/potrace-1.12/src/potracelib_demo.c')
-rw-r--r--Build/source/libs/potrace/potrace-1.12/src/potracelib_demo.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/Build/source/libs/potrace/potrace-1.12/src/potracelib_demo.c b/Build/source/libs/potrace/potrace-1.12/src/potracelib_demo.c
new file mode 100644
index 00000000000..ea8e8935fcb
--- /dev/null
+++ b/Build/source/libs/potrace/potrace-1.12/src/potracelib_demo.c
@@ -0,0 +1,144 @@
+/* Copyright (C) 2001-2015 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 */
+
+#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;
+}