aseprite/third_party/loadpng/regpng.c

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/* loadpng, Allegro wrapper routines for libpng
* by Peter Wang (tjaden@users.sf.net).
*/
#include <allegro.h>
#include "loadpng.h"
/* register_png_file_type:
*/
void register_png_file_type(void)
{
register_bitmap_file_type("png", load_png, save_png);
}
/* register_png_datafile_object:
*/
static void *load_datafile_png(PACKFILE *f, long size)
{
BITMAP *bmp;
void *buffer;
buffer = malloc(size);
if (!buffer)
return NULL;
if (pack_fread(buffer, size, f) != size) {
free(buffer);
return NULL;
}
bmp = load_memory_png(buffer, size, NULL);
free(buffer);
return bmp;
}
static void destroy_datafile_png(void *data)
{
if (data) {
destroy_bitmap((BITMAP *)data);
}
}
void register_png_datafile_object(int id)
{
register_datafile_object(id, load_datafile_png, destroy_datafile_png);
}
/* loadpng_init:
* This is supposed to resemble jpgalleg_init in JPGalleg 2.0.
*/
int loadpng_init(void)
{
register_png_datafile_object(DAT_ID('P','N','G',' '));
register_png_file_type();
return 0;
}