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/*
Simple PNG handling library
Under GPL v2 License
2011 by bitrider
*/
#include <stdlib.h>
#include "lodepng.h"
#include "png.h"
#define ERROR(err) {if (error) (*error) = PNG_ERROR_OPENING; return NULL;}
gBITMAP *load_png(char *filename, int *error) /* We need to open the file */
{
gBITMAP *img = NULL;
unsigned int e;
// allocate memory
img = malloc(sizeof(gBITMAP));
if (!img) ERROR(PNG_ERROR_MEMORY);
img->data = NULL;
e = LodePNG_decode32_file(&img->data, &img->w, &img->h, filename);
if (e) {
gDestroyBitmap(img);
ERROR(e);
}
img->bpp = 32;
if (error) (*error) = PNG_OK;
return img;
}
int save_png(gBITMAP *img, char *filename) {
if ((!img) || (!img->data) || (img->bpp != 32)) return PNG_ERROR_INVALID_INPUT;
return LodePNG_encode32_file(filename, img->data, img->w, img->h);
}
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