added close method. Fixed all known memory leaks

1 files changed, 8 insertions, 2 deletions

diff --git a/src/png.c b/src/png.c
index 659e935..fa6e9f7 100644
--- a/src/png.c
+++ b/src/png.c
@@ -96,14 +96,20 @@ int png_read(struct image *img){
 		row_pointers[y] = img->buf + y * img->width * 3;
 
     png_read_image(p->png_ptr, row_pointers);
+	free(row_pointers);
+	return 0;
+}
 
+void png_close(struct image *img){
+	struct png_t *p = (struct png_t *)img;
 	png_destroy_read_struct(&p->png_ptr, &p->info_ptr, &p->end_info);
-	return 0;
+	fclose(p->f);
 }
 
 struct imageformat libpng = {
 	png_open,
-	png_read
+	png_read,
+	png_close
 };