void
read_image(liq_attr *attr, FILE *source, png24_image *png, liq_image **image)
{
rwpng_read_image24(source, png);
*image = liq_image_create_rgba_rows(attr, (void **) png->row_pointers,
png->width, png->height, png->gamma);
}
/*
Reads image into png24_image struct. Returns non-zero on error
*/
static int read_image(const char *filename, png24_image *image)
{
FILE *fp = fopen(filename, "rb");
if (!fp) {
return 1;
}
int retval = rwpng_read_image24(fp, image, 0);
fclose(fp);
return retval;
}
static pngquant_error read_image(liq_attr *options, const char *filename, int using_stdin, png24_image *input_image_p, liq_image **liq_image_p, bool keep_input_pixels, bool verbose)
{
FILE *infile;
if (using_stdin) {
set_binary_mode(stdin);
infile = stdin;
} else if ((infile = fopen(filename, "rb")) == NULL) {
fprintf(stderr, " error: cannot open %s for reading\n", filename);
return READ_ERROR;
}
pngquant_error retval;
#pragma omp critical (libpng)
{
retval = rwpng_read_image24(infile, input_image_p, verbose);
}
if (!using_stdin) {
fclose(infile);
}
if (retval) {
fprintf(stderr, " error: cannot decode image %s\n", using_stdin ? "from stdin" : filename_part(filename));
return retval;
}
*liq_image_p = liq_image_create_rgba_rows(options, (void**)input_image_p->row_pointers, input_image_p->width, input_image_p->height, input_image_p->gamma);
if (!*liq_image_p) {
return OUT_OF_MEMORY_ERROR;
}
if (!keep_input_pixels) {
if (LIQ_OK != liq_image_set_memory_ownership(*liq_image_p, LIQ_OWN_ROWS | LIQ_OWN_PIXELS)) {
return OUT_OF_MEMORY_ERROR;
}
input_image_p->row_pointers = NULL;
input_image_p->rgba_data = NULL;
}
return SUCCESS;
}
static int read_image(const char *filename, png24_image *image)
{
int retval=1;
bool using_stdin = false;
FILE *fh;
unsigned char buffer[8];
if (0 == strcmp("-", filename)) {
using_stdin = true;
fh = stdin;
} else {
fh = fopen(filename, "rb");
if (!fh) {
return 1;
}
}
setvbuf(fh, (char *)buffer, _IOFBF, 8);
// the first read fills the buffer up, but put char back on after
int c = fgetc(fh);
ungetc(c, fh);
// the png number is not really precise but I guess the situation where this would falsely pass is almost equal to 0
if (png_check_sig(buffer, 8))
{
/*
Reads image into png24_image struct. Returns non-zero on error
*/
retval = rwpng_read_image24(fh, image, 0);
}
#ifdef USE_LIBJPEG
else
{
retval=read_image_jpeg(fh,image);
}
#endif
if(!using_stdin) {
fclose(fh);
}
return retval;
}
