added workaround for a bug in SDL 2.0.12 which prevents transparency

[rocksndiamonds.git] / src / libgame / sdl.c

diff --git a/src/libgame/sdl.c b/src/libgame/sdl.c
index 1184acd84a4b227af94424e920b8b201bdb42344..457f567ad59f461b3b90266785d9ec014bfa969d 100644 (file)
--- a/src/libgame/sdl.c
+++ b/src/libgame/sdl.c
@@ -273,7 +273,7 @@ static void SDLSetWindowIcon(char *basename)
 
   if ((surface = IMG_Load(filename)) == NULL)
   {
-    Error(ERR_WARN, "IMG_Load() failed: %s", SDL_GetError());
+    Error(ERR_WARN, "IMG_Load('%s') failed: %s", basename, SDL_GetError());
 
     return;
   }
@@ -353,6 +353,11 @@ SDL_Surface *SDLGetNativeSurface(SDL_Surface *surface)
   if (new_surface == NULL)
     Error(ERR_EXIT, "SDL_ConvertSurface() failed: %s", SDL_GetError());
 
+  // workaround for a bug in SDL 2.0.12 (which does not convert the color key)
+  if (SDLHasColorKey(surface) && !SDLHasColorKey(new_surface))
+    SDL_SetColorKey(new_surface, SET_TRANSPARENT_PIXEL,
+                   SDLGetColorKey(surface));
+
   return new_surface;
 }
 
@@ -2239,7 +2244,8 @@ Bitmap *SDLLoadImage(char *filename)
 
   // load image to temporary surface
   if ((sdl_image_tmp = IMG_Load(filename)) == NULL)
-    Error(ERR_EXIT, "IMG_Load() failed: %s", SDL_GetError());
+    Error(ERR_EXIT, "IMG_Load('%s') failed: %s", getBaseNamePtr(filename),
+         SDL_GetError());
 
   print_timestamp_time("IMG_Load");