jboolean saveToFile(JNIEnv* env, jobject thiz, jstring path, int w, int h, const char* filetype)
{
char const * filepath = env->GetStringUTFChars(path, NULL);
imginfo_t imginfo;
imginfo.pixwidth = w;
imginfo.pixheight = h;
initInfo(filetype);
calc_dimensions(&imginfo, s_state->plist);
FILE* f = fopen(filepath,"w+");
if(f)
{
struct backend_s * b = info.backend;
if (b->init_f) {
if(b->init_f(f) != 0)
{
fclose(f);
return JNI_FALSE;
}
}
b->page_f(f, s_state->plist, &imginfo);
if (b->term_f) {
if(b->term_f(f) != 0)
{
fclose(f);
return JNI_FALSE;
}
}
fclose(f);
return JNI_TRUE;
}
return JNI_FALSE;
}
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 */
}