if (surface == NULL)
return NULL;
- if (video.initialized)
- new_surface = SDL_DisplayFormat(surface);
- else
+ if (!video.initialized)
new_surface = SDL_ConvertSurface(surface, surface->format, SURFACE_FLAGS);
+ else if (SDLHasAlpha(surface))
+ new_surface = SDL_DisplayFormatAlpha(surface);
+ else
+ new_surface = SDL_DisplayFormat(surface);
if (new_surface == NULL)
Error(ERR_EXIT, "%s() failed: %s",
{
/* new source surface is 32 bit with a defined RGB ordering */
zoom_src = SDL_CreateRGBSurface(SURFACE_FLAGS, src->w, src->h, 32,
- 0x000000ff, 0x0000ff00, 0x00ff0000, 0);
+ 0x000000ff, 0x0000ff00, 0x00ff0000,
+ (src->format->Amask ? 0xff000000 : 0));
SDL_BlitSurface(src, NULL, zoom_src, NULL);
is_32bit = TRUE;
is_converted = TRUE;
zoom_dst = SDL_CreateRGBSurface(SURFACE_FLAGS, dst_width, dst_height, 32,
zoom_src->format->Rmask,
zoom_src->format->Gmask,
- zoom_src->format->Bmask, 0);
+ zoom_src->format->Bmask,
+ zoom_src->format->Amask);
}
else
{
return zoom_dst;
}
+static SDL_Surface *SDLGetOpaqueSurface(SDL_Surface *surface)
+{
+ SDL_Surface *new_surface;
+
+ if (surface == NULL)
+ return NULL;
+
+ if ((new_surface = SDLGetNativeSurface(surface)) == NULL)
+ Error(ERR_EXIT, "SDLGetNativeSurface() failed");
+
+ /* remove alpha channel from native non-transparent surface, if defined */
+ SDLSetAlpha(new_surface, FALSE, 0);
+
+ /* remove transparent color from native non-transparent surface, if defined */
+ SDL_SetColorKey(new_surface, UNSET_TRANSPARENT_PIXEL, 0);
+
+ return new_surface;
+}
+
Bitmap *SDLZoomBitmap(Bitmap *src_bitmap, int dst_width, int dst_height)
{
Bitmap *dst_bitmap = CreateBitmapStruct();
- SDL_Surface **dst_surface = &dst_bitmap->surface;
+ SDL_Surface *src_surface = src_bitmap->surface_masked;
+ SDL_Surface *dst_surface;
dst_width = MAX(1, dst_width); /* prevent zero bitmap width */
dst_height = MAX(1, dst_height); /* prevent zero bitmap height */
dst_bitmap->height = dst_height;
/* create zoomed temporary surface from source surface */
- *dst_surface = zoomSurface(src_bitmap->surface, dst_width, dst_height);
+ dst_surface = zoomSurface(src_surface, dst_width, dst_height);
/* create native format destination surface from zoomed temporary surface */
- SDLSetNativeSurface(dst_surface);
+ SDLSetNativeSurface(&dst_surface);
+
+ /* set color key for zoomed surface from source surface, if defined */
+ if (SDLHasColorKey(src_surface))
+ SDL_SetColorKey(dst_surface, SET_TRANSPARENT_PIXEL,
+ SDLGetColorKey(src_surface));
+
+ /* create native non-transparent surface for opaque blitting */
+ dst_bitmap->surface = SDLGetOpaqueSurface(dst_surface);
+
+ /* set native transparent surface for masked blitting */
+ dst_bitmap->surface_masked = dst_surface;
return dst_bitmap;
}
/* load image to temporary surface */
if ((sdl_image_tmp = IMG_Load(filename)) == NULL)
- {
- SetError("IMG_Load(): %s", SDL_GetError());
-
- return NULL;
- }
+ Error(ERR_EXIT, "IMG_Load() failed: %s", SDL_GetError());
print_timestamp_time("IMG_Load");
UPDATE_BUSY_STATE();
/* create native non-transparent surface for current image */
- if ((new_bitmap->surface = SDLGetNativeSurface(sdl_image_tmp)) == NULL)
- {
- SetError("SDL_DisplayFormat(): %s", SDL_GetError());
-
- return NULL;
- }
+ if ((new_bitmap->surface = SDLGetOpaqueSurface(sdl_image_tmp)) == NULL)
+ Error(ERR_EXIT, "SDLGetOpaqueSurface() failed");
- print_timestamp_time("SDL_DisplayFormat (opaque)");
+ print_timestamp_time("SDLGetNativeSurface (opaque)");
UPDATE_BUSY_STATE();
- /* create native transparent surface for current image */
- if (sdl_image_tmp->format->Amask == 0)
+ /* set black pixel to transparent if no alpha channel / transparent color */
+ if (!SDLHasAlpha(sdl_image_tmp) &&
+ !SDLHasColorKey(sdl_image_tmp))
SDL_SetColorKey(sdl_image_tmp, SET_TRANSPARENT_PIXEL,
SDL_MapRGB(sdl_image_tmp->format, 0x00, 0x00, 0x00));
+ /* create native transparent surface for current image */
if ((new_bitmap->surface_masked = SDLGetNativeSurface(sdl_image_tmp)) == NULL)
- {
- SetError("SDL_DisplayFormat(): %s", SDL_GetError());
-
- return NULL;
- }
+ Error(ERR_EXIT, "SDLGetNativeSurface() failed");
- print_timestamp_time("SDL_DisplayFormat (masked)");
+ print_timestamp_time("SDLGetNativeSurface (masked)");
UPDATE_BUSY_STATE();