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comparison src/SDL_compat.c @ 2838:00356f22195a

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Fixed SDL_SetAlpha compatibility function to match the documentation
author Sam Lantinga <slouken@libsdl.org>
date Sat, 06 Dec 2008 05:49:53 +0000
parents 7173fc5c7ef6
children 7046f9567045
comparison
equal deleted inserted replaced
2837:ff8db79a3cc9 2838:00356f22195a
684 } 684 }
685 685
686 int 686 int
687 SDL_SetAlpha(SDL_Surface * surface, Uint32 flag, Uint8 value) 687 SDL_SetAlpha(SDL_Surface * surface, Uint32 flag, Uint8 value)
688 { 688 {
689 if (flag & SDL_RLEACCEL) { 689 if (flag & SDL_SRCALPHA) {
690 SDL_SetSurfaceRLE(surface, 1); 690 /* According to the docs, value is ignored for alpha surfaces */
691 } 691 if (surface->format->Amask) {
692 if (flag) { 692 value = 0xFF;
693 }
693 SDL_SetSurfaceAlphaMod(surface, value); 694 SDL_SetSurfaceAlphaMod(surface, value);
694 SDL_SetSurfaceBlendMode(surface, SDL_TEXTUREBLENDMODE_BLEND); 695 SDL_SetSurfaceBlendMode(surface, SDL_TEXTUREBLENDMODE_BLEND);
695 } else { 696 } else {
696 SDL_SetSurfaceAlphaMod(surface, 0xFF); 697 SDL_SetSurfaceAlphaMod(surface, 0xFF);
697 SDL_SetSurfaceBlendMode(surface, SDL_TEXTUREBLENDMODE_NONE); 698 SDL_SetSurfaceBlendMode(surface, SDL_TEXTUREBLENDMODE_NONE);
698 } 699 }
700 SDL_SetSurfaceRLE(surface, (flag & SDL_RLEACCEL));
701
699 return 0; 702 return 0;
700 } 703 }
701 704
702 SDL_Surface * 705 SDL_Surface *
703 SDL_DisplayFormat(SDL_Surface * surface) 706 SDL_DisplayFormat(SDL_Surface * surface)