Mercurial > sdl-ios-xcode
comparison test/testwin.c @ 2821:c4eccbd21d16
You can't use memset() on screen formats with an alpha channel
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 02 Dec 2008 16:09:58 +0000 |
parents | c121d94672cb |
children |
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2820:33ddad305f3d | 2821:c4eccbd21d16 |
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71 if (!SDL_SetColors(screen, colors, 0, ncolors) && | 71 if (!SDL_SetColors(screen, colors, 0, ncolors) && |
72 (screen->format->palette != NULL)) { | 72 (screen->format->palette != NULL)) { |
73 fprintf(stderr, | 73 fprintf(stderr, |
74 "Warning: Couldn't set all of the colors, but SDL will map the image\n" | 74 "Warning: Couldn't set all of the colors, but SDL will map the image\n" |
75 " (colormap fading will suffer - try the -warp option)\n"); | 75 " (colormap fading will suffer - try the -warp option)\n"); |
76 } | |
77 | |
78 /* Set the screen to black (not really necessary) */ | |
79 if (SDL_LockSurface(screen) == 0) { | |
80 Uint32 black; | |
81 Uint8 *pixels; | |
82 | |
83 black = SDL_MapRGB(screen->format, 0, 0, 0); | |
84 pixels = (Uint8 *) screen->pixels; | |
85 for (i = 0; i < screen->h; ++i) { | |
86 memset(pixels, black, screen->w * screen->format->BytesPerPixel); | |
87 pixels += screen->pitch; | |
88 } | |
89 SDL_UnlockSurface(screen); | |
90 SDL_UpdateRect(screen, 0, 0, 0, 0); | |
91 } | 76 } |
92 | 77 |
93 /* Display the picture */ | 78 /* Display the picture */ |
94 if (speedy) { | 79 if (speedy) { |
95 SDL_Surface *displayfmt; | 80 SDL_Surface *displayfmt; |