matthew/The-Powder-Toy
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Performance optimisation for blitting loops and depth3d

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This commit is contained in:
Simon Robertshaw 2016-07-12 19:48:58 +01:00
parent 0cf117a5f0
commit b66ca770da
1 changed files with 29 additions and 13 deletions
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38
src/PowderToySDL.cpp
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@ -279,11 +279,11 @@ void blit(pixel * vid)
unsigned int red, green, blue;
pixel px, lastpx, nextpx;
SDL_PixelFormat *fmt = sdl_scrn->format;
if(depth3d)
{
for (j=0; j<h; j++)
{
for (i=0; i<w; i++)
{
if (depth3d)
{
lastpx = i >= depth3d && i < w+depth3d ? src[i-depth3d] : 0;
nextpx = i >= -depth3d && i < w-depth3d ? src[i+depth3d] : 0;
@ -296,14 +296,6 @@ void blit(pixel * vid)
red = ((int)(PIXR(lastpx)*.69f+redshift*.3f)>>fmt->Rloss)<<fmt->Rshift;
green = ((int)(PIXG(nextpx)*.3f)>>fmt->Gloss)<<fmt->Gshift;
blue = ((int)(PIXB(nextpx)*.69f+blueshift*.3f)>>fmt->Bloss)<<fmt->Bshift;
}
else
{
px = src[i];
red = (PIXR(px)>>fmt->Rloss)<<fmt->Rshift;
green = (PIXG(px)>>fmt->Gloss)<<fmt->Gshift;
blue = (PIXB(px)>>fmt->Bloss)<<fmt->Bshift;
}
dst[i] = red|green|blue;
}
dst+=sdl_scrn->pitch/PIXELSIZE;
@ -312,12 +304,29 @@ void blit(pixel * vid)
}
else
{
int i;
for (j=0; j<h; j++)
{
for (i=0; i<w; i++)
{
px = src[i];
red = (PIXR(px)>>fmt->Rloss)<<fmt->Rshift;
green = (PIXG(px)>>fmt->Gloss)<<fmt->Gshift;
blue = (PIXB(px)>>fmt->Bloss)<<fmt->Bshift;
dst[i] = red|green|blue;
}
dst+=sdl_scrn->pitch/PIXELSIZE;
src+=pitch;
}
}
}
else
{
int i;
if(depth3d)
{
pixel lastpx, nextpx;
for (j=0; j<h; j++)
{
for (i=0; i<w; i++)
{
lastpx = i >= depth3d && i < w+depth3d ? src[i-depth3d] : 0;
@ -330,13 +339,20 @@ void blit(pixel * vid)
blueshift = 255;
dst[i] = PIXRGB((int)(PIXR(lastpx)*.69f+redshift*.3f), (int)(PIXG(nextpx)*.3f), (int)(PIXB(nextpx)*.69f+blueshift*.3f));
}
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);
SDL_UpdateRect(sdl_scrn,0,0,0,0);