+ surface_screen->format->BitsPerPixel,
+ surface_screen->format->Rmask,
+ surface_screen->format->Gmask,
+ surface_screen->format->Bmask,
+ surface_screen->format->Amask)) == NULL)
+ Error(ERR_EXIT, "SDL_CreateRGBSurface( ) failed: %s", SDL_GetError());
+
+ /* create black surface for fading from/to black */
+ if ((surface_black =
+ SDL_CreateRGBSurface(flags,
+#if 1
+ video.width,
+ video.height,
+#else
+ surface_screen->w,
+ surface_screen->h,
+#endif
+ surface_screen->format->BitsPerPixel,
+ surface_screen->format->Rmask,
+ surface_screen->format->Gmask,
+ surface_screen->format->Bmask,
+ surface_screen->format->Amask)) == NULL)
+ Error(ERR_EXIT, "SDL_CreateRGBSurface( ) failed: %s", SDL_GetError());
+
+ /* completely fill the surface with black color pixels */
+ SDL_FillRect(surface_black, NULL,
+ SDL_MapRGB(surface_screen->format, 0, 0, 0));
+
+ initialization_needed = FALSE;
+ }
+
+ /* copy the current screen backbuffer to the temporary screen copy buffer */
+ SDL_BlitSurface(surface_screen, &dst_rect, surface_screen_copy, &src_rect);
+
+ surface_cross = (fade_mode == FADE_MODE_CROSSFADE ? bitmap_cross->surface :
+ surface_black);
+
+ time_current = SDL_GetTicks();
+
+ for (alpha = 0.0; alpha < 255.0;)
+ {
+ time_last = time_current;
+ time_current = SDL_GetTicks();
+ alpha += 255 * ((float)(time_current - time_last) / fade_delay);
+ alpha_final = (int)(fade_reverse ? 255.0 - alpha : alpha);
+ alpha_final = MIN(MAX(0, alpha_final), 255);
+
+ /* draw existing image to screen buffer */
+ SDL_BlitSurface(surface_screen_copy, &src_rect, surface_screen, &dst_rect);
+
+ /* draw new image to screen buffer using alpha blending */
+ SDL_SetAlpha(surface_cross, SDL_SRCALPHA, alpha_final);
+ SDL_BlitSurface(surface_cross, &src_rect, surface_screen, &dst_rect);
+
+ /* draw screen buffer to visible display */
+ SDL_Flip(surface_screen);
+ }
+
+ Delay(post_delay);
+}
+
+void SDLDrawSimpleLine(Bitmap *dst_bitmap, int from_x, int from_y,
+ int to_x, int to_y, Uint32 color)
+{
+ SDL_Surface *surface = dst_bitmap->surface;
+ SDL_Rect rect;