pandory500/SDL-mirror
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Added support for 32-bit BMP files with an alpha channel

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--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404238
This commit is contained in:
Sam Lantinga 2009-11-30 17:57:12 +00:00
parent 215689096f
commit a8a1831e74
1 changed files with 14 additions and 3 deletions
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17
src/video/SDL_bmp.c
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@ -57,6 +57,7 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
Uint32 Rmask;
Uint32 Gmask;
Uint32 Bmask;
Uint32 Amask;
SDL_Palette *palette;
Uint8 *bits;
Uint8 *top, *end;
@ -160,7 +161,7 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
}
/* We don't support any BMP compression right now */
Rmask = Gmask = Bmask = 0;
Rmask = Gmask = Bmask = Amask = 0;
switch (biCompression) {
case BI_RGB:
/* If there are no masks, use the defaults */
@ -178,9 +179,14 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
Rmask = 0x000000FF;
Gmask = 0x0000FF00;
Bmask = 0x00FF0000;
break;
#else
Rmask = 0x00FF0000;
Gmask = 0x0000FF00;
Bmask = 0x000000FF;
#endif
break;
case 32:
Amask = 0xFF000000;
Rmask = 0x00FF0000;
Gmask = 0x0000FF00;
Bmask = 0x000000FF;
@ -196,10 +202,15 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
switch (biBitCount) {
case 15:
case 16:
Rmask = SDL_ReadLE32(src);
Gmask = SDL_ReadLE32(src);
Bmask = SDL_ReadLE32(src);
break;
case 32:
Rmask = SDL_ReadLE32(src);
Gmask = SDL_ReadLE32(src);
Bmask = SDL_ReadLE32(src);
Amask = SDL_ReadLE32(src);
break;
default:
break;
@ -214,7 +225,7 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
/* Create a compatible surface, note that the colors are RGB ordered */
surface =
SDL_CreateRGBSurface(0, biWidth, biHeight, biBitCount, Rmask, Gmask,
Bmask, 0);
Bmask, Amask);
if (surface == NULL) {
was_error = SDL_TRUE;
goto done;