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Pixel format conversion

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This commit is contained in:
jacksonmj 2011-06-16 23:41:19 +01:00 committed by Simon Robertshaw
parent dbf6dcd35b
commit ad99287f8a
1 changed files with 59 additions and 11 deletions
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70
src/graphics.c
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@ -282,11 +282,33 @@ void sdl_blit_1(int x, int y, int w, int h, pixel *src, int pitch)
if (SDL_LockSurface(sdl_scrn)<0)
return;
dst=(pixel *)sdl_scrn->pixels+y*sdl_scrn->pitch/PIXELSIZE+x;
for (j=0; j<h; j++)
if (SDL_MapRGB(sdl_scrn->format,0x33,0x55,0x77)!=PIXPACK(0x335577))
{
memcpy(dst, src, w*PIXELSIZE);
dst+=sdl_scrn->pitch/PIXELSIZE;
src+=pitch;
//pixel format conversion
int i;
pixel px;
SDL_PixelFormat *fmt = sdl_scrn->format;
for (j=0; j<h; j++)
{
for (i=0; i<w; i++)
{
px = src[i];
dst[i] = ((PIXR(px)>>fmt->Rloss)<<fmt->Rshift)|
((PIXG(px)>>fmt->Gloss)<<fmt->Gshift)|
((PIXB(px)>>fmt->Bloss)<<fmt->Bshift);
}
dst+=sdl_scrn->pitch/PIXELSIZE;
src+=pitch;
}
}
else
{
for (j=0; j<h; j++)
{
memcpy(dst, src, w*PIXELSIZE);
dst+=sdl_scrn->pitch/PIXELSIZE;
src+=pitch;
}
}
if (SDL_MUSTLOCK(sdl_scrn))
SDL_UnlockSurface(sdl_scrn);
@ -302,18 +324,44 @@ void sdl_blit_2(int x, int y, int w, int h, pixel *src, int pitch)
if (SDL_LockSurface(sdl_scrn)<0)
return;
dst=(pixel *)sdl_scrn->pixels+y*sdl_scrn->pitch/PIXELSIZE+x;
for (j=0; j<h; j++)
if (SDL_MapRGB(sdl_scrn->format,0x33,0x55,0x77)!=PIXPACK(0x335577))
{
for (k=0; k<sdl_scale; k++)
//pixel format conversion
pixel px;
SDL_PixelFormat *fmt = sdl_scrn->format;
for (j=0; j<h; j++)
{
for (i=0; i<w; i++)
for (k=0; k<sdl_scale; k++)
{
dst[i*2]=src[i];
dst[i*2+1]=src[i];
for (i=0; i<w; i++)
{
px = src[i];
px = ((PIXR(px)>>fmt->Rloss)<<fmt->Rshift)|
((PIXG(px)>>fmt->Gloss)<<fmt->Gshift)|
((PIXB(px)>>fmt->Bloss)<<fmt->Bshift);
dst[i*2]=px;
dst[i*2+1]=px;
}
dst+=sdl_scrn->pitch/PIXELSIZE;
}
dst+=sdl_scrn->pitch/PIXELSIZE;
src+=pitch;
}
}
else
{
for (j=0; j<h; j++)
{
for (k=0; k<sdl_scale; k++)
{
for (i=0; i<w; i++)
{
dst[i*2]=src[i];
dst[i*2+1]=src[i];
}
dst+=sdl_scrn->pitch/PIXELSIZE;
}
src+=pitch;
}
src+=pitch;
}
if (SDL_MUSTLOCK(sdl_scrn))
SDL_UnlockSurface(sdl_scrn);