initial pocketsnes commit

1 files changed, 38 insertions, 0 deletions

diff --git a/src/png.c b/src/png.c
new file mode 100644
index 0000000..2d24c47
--- /dev/null
+++ b/src/png.c
@@ -0,0 +1,38 @@
+/*
+	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);
+}