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lock unlock

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This commit is contained in:
p.kosyh 2011-04-13 18:05:38 +00:00
parent 91a46a853f
commit ed1e26d151
1 changed files with 12 additions and 11 deletions
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23
src/sdl-instead/graphics.c
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@ -593,18 +593,19 @@ img_t gfx_alpha_img(img_t src, int alpha)
if (!img)
return NULL;
SDL_SetAlpha(img, SDL_SRCALPHA, SDL_ALPHA_OPAQUE);
SDL_LockSurface(img);
ptr = (Uint32*)img->pixels;
size = img->w * img->h;
while (size --) {
Uint8 r, g, b, a;
col = *ptr;
SDL_GetRGBA(col, img->format, &r, &g, &b, &a);
col = SDL_MapRGBA(img->format, r, g, b, a * alpha / 255);
*ptr = col;
ptr ++;
if (SDL_LockSurface(img) == 0) {
ptr = (Uint32*)img->pixels;
size = img->w * img->h;
while (size --) {
Uint8 r, g, b, a;
col = *ptr;
SDL_GetRGBA(col, img->format, &r, &g, &b, &a);
col = SDL_MapRGBA(img->format, r, g, b, a * alpha / 255);
*ptr = col;
ptr ++;
}
SDL_UnlockSurface(img);
}
SDL_UnlockSurface(img);
return img;
}