--- src/render/opengl/SDL_render_gl.c	2014-09-25 08:49:32.124062188 +0200
+++ src/render/opengl/SDL_render_gl.c.orig	2014-09-24 22:22:09.890435986 +0200
@@ -1364,20 +1364,20 @@
         return -1;
     }
 
-    /* /\* Flip the rows to be top-down *\/ */
-    /* length = rect->w * SDL_BYTESPERPIXEL(temp_format); */
-    /* src = (Uint8*)temp_pixels + (rect->h-1)*temp_pitch; */
-    /* dst = (Uint8*)temp_pixels; */
-    /* tmp = SDL_stack_alloc(Uint8, length); */
-    /* rows = rect->h / 2; */
-    /* while (rows--) { */
-    /*     SDL_memcpy(tmp, dst, length); */
-    /*     SDL_memcpy(dst, src, length); */
-    /*     SDL_memcpy(src, tmp, length); */
-    /*     dst += temp_pitch; */
-    /*     src -= temp_pitch; */
-    /* } */
-    /* SDL_stack_free(tmp); */
+    /* Flip the rows to be top-down */
+    length = rect->w * SDL_BYTESPERPIXEL(temp_format);
+    src = (Uint8*)temp_pixels + (rect->h-1)*temp_pitch;
+    dst = (Uint8*)temp_pixels;
+    tmp = SDL_stack_alloc(Uint8, length);
+    rows = rect->h / 2;
+    while (rows--) {
+        SDL_memcpy(tmp, dst, length);
+        SDL_memcpy(dst, src, length);
+        SDL_memcpy(src, tmp, length);
+        dst += temp_pitch;
+        src -= temp_pitch;
+    }
+    SDL_stack_free(tmp);
 
     status = SDL_ConvertPixels(rect->w, rect->h,
                                temp_format, temp_pixels, temp_pitch,