X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Flibgame%2Fsdl.c;h=abb200fb97d5bb04366b835f42e43cc797b63a04;hb=36b0cfea2bb95eee88f24e21c85324dd87eb19f9;hp=4b44daa1c53d6ce82c6c59f62cc134800b671d61;hpb=b4a4b3e959ada7bae876a4a9d78f534e320a7b41;p=rocksndiamonds.git diff --git a/src/libgame/sdl.c b/src/libgame/sdl.c index 4b44daa1..abb200fb 100644 --- a/src/libgame/sdl.c +++ b/src/libgame/sdl.c @@ -226,6 +226,39 @@ static boolean equalSDLPixelFormat(SDL_PixelFormat *format1, format1->Bmask == format2->Bmask); } +static Pixel SDLGetColorKey(SDL_Surface *surface) +{ + Pixel color_key; + + if (SDL_GetColorKey(surface, &color_key) != 0) + return -1; + + return color_key; +} + +static boolean SDLHasColorKey(SDL_Surface *surface) +{ + return (SDLGetColorKey(surface) != -1); +} + +static boolean SDLHasAlpha(SDL_Surface *surface) +{ + SDL_BlendMode blend_mode; + + if (SDL_GetSurfaceBlendMode(surface, &blend_mode) != 0) + return FALSE; + + return (blend_mode == SDL_BLENDMODE_BLEND); +} + +static void SDLSetAlpha(SDL_Surface *surface, boolean set, int alpha) +{ + SDL_BlendMode blend_mode = (set ? SDL_BLENDMODE_BLEND : SDL_BLENDMODE_NONE); + + SDL_SetSurfaceBlendMode(surface, blend_mode); + SDL_SetSurfaceAlphaMod(surface, alpha); +} + SDL_Surface *SDLGetNativeSurface(SDL_Surface *surface) { SDL_PixelFormat format; @@ -277,6 +310,29 @@ boolean SDLSetNativeSurface(SDL_Surface **surface) #else +static Pixel SDLGetColorKey(SDL_Surface *surface) +{ + if ((surface->flags & SDL_SRCCOLORKEY) == 0) + return -1; + + return surface->format->colorkey; +} + +static boolean SDLHasColorKey(SDL_Surface *surface) +{ + return (SDLGetColorKey(surface) != -1); +} + +static boolean SDLHasAlpha(SDL_Surface *surface) +{ + return ((surface->flags & SDL_SRCALPHA) != 0); +} + +static void SDLSetAlpha(SDL_Surface *surface, boolean set, int alpha) +{ + SDL_SetAlpha(surface, (set ? SDL_SRCALPHA : 0), alpha); +} + SDL_Surface *SDLGetNativeSurface(SDL_Surface *surface) { SDL_Surface *new_surface; @@ -284,10 +340,12 @@ SDL_Surface *SDLGetNativeSurface(SDL_Surface *surface) 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", @@ -988,11 +1046,8 @@ void SDLFadeRectangle(int x, int y, int width, int height, int i; SDL_BlitSurface(surface_source, &src_rect, surface_screen, &dst_rect); -#if defined(TARGET_SDL2) - SDL_SetSurfaceBlendMode(surface_target, SDL_BLENDMODE_NONE); -#else - SDL_SetAlpha(surface_target, 0, 0); /* disable alpha blending */ -#endif + + SDLSetAlpha(surface_target, FALSE, 0); /* disable alpha blending */ ypos[0] = -GetSimpleRandom(16); @@ -1105,11 +1160,8 @@ void SDLFadeRectangle(int x, int y, int width, int height, int xx_size = width / 2; SDL_BlitSurface(surface_target, &src_rect, surface_screen, &dst_rect); -#if defined(TARGET_SDL2) - SDL_SetSurfaceBlendMode(surface_source, SDL_BLENDMODE_NONE); -#else - SDL_SetAlpha(surface_source, 0, 0); /* disable alpha blending */ -#endif + + SDLSetAlpha(surface_source, FALSE, 0); /* disable alpha blending */ for (xx = 0; xx < xx_size;) { @@ -1172,12 +1224,7 @@ void SDLFadeRectangle(int x, int y, int width, int height, SDL_BlitSurface(surface_source, &src_rect, surface_screen, &dst_rect); /* draw new (target) image to screen buffer using alpha blending */ -#if defined(TARGET_SDL2) - SDL_SetSurfaceAlphaMod(surface_target, alpha_final); - SDL_SetSurfaceBlendMode(surface_target, SDL_BLENDMODE_BLEND); -#else - SDL_SetAlpha(surface_target, SDL_SRCALPHA, alpha_final); -#endif + SDLSetAlpha(surface_target, TRUE, alpha_final); SDL_BlitSurface(surface_target, &src_rect, surface_screen, &dst_rect); if (draw_border_function != NULL) @@ -2077,7 +2124,8 @@ SDL_Surface *zoomSurface(SDL_Surface *src, int dst_width, int dst_height) { /* 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; @@ -2090,7 +2138,8 @@ SDL_Surface *zoomSurface(SDL_Surface *src, int dst_width, int dst_height) 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 { @@ -2131,10 +2180,29 @@ SDL_Surface *zoomSurface(SDL_Surface *src, int dst_width, int dst_height) 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, "SDL_DisplayFormat() 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 **dst_surface = &dst_bitmap->surface_masked; dst_width = MAX(1, dst_width); /* prevent zero bitmap width */ dst_height = MAX(1, dst_height); /* prevent zero bitmap height */ @@ -2143,11 +2211,19 @@ Bitmap *SDLZoomBitmap(Bitmap *src_bitmap, int dst_width, int dst_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_bitmap->surface_masked, dst_width, dst_height); /* create native format destination surface from zoomed temporary surface */ SDLSetNativeSurface(dst_surface); + /* set color key for zoomed surface from source surface, if defined */ + if (SDLHasColorKey(src_bitmap->surface_masked)) + SDL_SetColorKey(*dst_surface, SET_TRANSPARENT_PIXEL, + SDLGetColorKey(src_bitmap->surface_masked)); + + /* create native non-transparent surface for opaque blitting */ + dst_bitmap->surface = SDLGetOpaqueSurface(dst_bitmap->surface_masked); + return dst_bitmap; } @@ -2185,15 +2261,23 @@ Bitmap *SDLLoadImage(char *filename) return NULL; } + /* remove alpha channel from native non-transparent surface, if defined */ + SDLSetAlpha(new_bitmap->surface, FALSE, 0); + + /* remove transparent color from native non-transparent surface, if defined */ + SDL_SetColorKey(new_bitmap->surface, UNSET_TRANSPARENT_PIXEL, 0); + print_timestamp_time("SDL_DisplayFormat (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());