From 065527d46c5840f673e1a97c2ee25830798390f3 Mon Sep 17 00:00:00 2001 From: Ricardo Cruz Date: Sun, 9 May 2004 01:13:20 +0000 Subject: [PATCH] SDL draw() now supports alpha blitting. SVN-Revision: 1049 --- src/texture.cpp | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/src/texture.cpp b/src/texture.cpp index df33c74ff..942881546 100644 --- a/src/texture.cpp +++ b/src/texture.cpp @@ -652,16 +652,38 @@ SurfaceSDL::draw(float x, float y, Uint8 alpha, bool update) if(alpha != 255) { /* Copy the SDL surface, then make it using alpha and use it to blit into the screen */ +/* SDL_Surface* sdl_surface_copy = SDL_CreateRGBSurface (sdl_surface->flags, sdl_surface->w, sdl_surface->h, sdl_surface->format->BitsPerPixel, - sdl_surface->format->Rmask, sdl_surface->format->Gmask, sdl_surface->format->Bmask, + sdl_surface->format->Rmask, sdl_surface->format->Gmask, + sdl_surface->format->Bmask, sdl_surface->format->Amask); SDL_BlitSurface(sdl_surface, NULL, sdl_surface_copy, NULL); SDL_SetAlpha(sdl_surface_copy ,SDL_SRCALPHA,alpha); - int ret = SDL_BlitSurface(sdl_surface_copy, NULL, screen, &dest); + int ret = SDL_BlitSurface(sdl_surface_copy, NULL, screen, &dest); */ + +/* *TEST* Create a Surface, make it using colorkey, blit surface into temp, apply alpha +to temp sur, blit the temp into the screen */ + + SDL_Surface* sdl_surface_copy = SDL_CreateRGBSurface (sdl_surface->flags, + sdl_surface->w, sdl_surface->h, sdl_surface->format->BitsPerPixel, + sdl_surface->format->Rmask, sdl_surface->format->Gmask, + sdl_surface->format->Bmask, + 0); +int colorkey = SDL_MapRGB(sdl_surface_copy->format, 255, 0, 255); +SDL_FillRect(sdl_surface_copy, NULL, colorkey); +SDL_SetColorKey(sdl_surface_copy, SDL_SRCCOLORKEY, colorkey); + + +SDL_BlitSurface(sdl_surface, NULL, sdl_surface_copy, NULL); +SDL_SetAlpha(sdl_surface_copy ,SDL_SRCALPHA,alpha); + +int ret = SDL_BlitSurface(sdl_surface_copy, NULL, screen, &dest); + + if (update == UPDATE) SDL_UpdateRect(screen, dest.x, dest.y, dest.w, dest.h); -- 2.11.0