Fixed bug setting colorkey for indexed PNG images

libsdl-org · Mar 23, 2013 · afa8d0d · afa8d0d
1 parent 29378f8
commit afa8d0d
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Showing 2 changed files with 9 additions and 4 deletions.
diff --git a/CHANGES b/CHANGES
@@ -1,4 +1,6 @@
 2.0.0:
+Sam Lantinga - Sat Mar 23 13:36:51 PDT 2013
+ * Fixed bug setting colorkey for indexed PNG images
 Torsten Stremlau - Sun Mar 10 10:19:25 PDT 2013
  * Added support for alpha and lossless WEBP images
 

diff --git a/IMG_png.c b/IMG_png.c
@@ -424,13 +424,16 @@ SDL_Surface *IMG_LoadPNG_RW(SDL_RWops *src)
 		if (color_type == PNG_COLOR_TYPE_PALETTE) {
 		    /* Check if all tRNS entries are opaque except one */
 		    int j, t = -1;
-		    for (j = 0; j < num_trans; j++)
+		    for (j = 0; j < num_trans; j++) {
 			if (trans[j] == 0) {
-			    if (t >= 0)
+			    if (t >= 0) {
 				break;
-			    t = i;
-			} else if (trans[j] != 255)
+                            }
+			    t = j;
+			} else if (trans[j] != 255) {
 			    break;
+                        }
+                    }
 		    if (j == num_trans) {
 			/* exactly one transparent index */
 			ckey = t;