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(svn r13602) -Codechange: little speedup for 8bpp-optimized blitter

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smatz 2008-06-21 20:58:34 +00:00
parent 2ca4b8b2e4
commit 37b8e87454
1 changed files with 16 additions and 12 deletions
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28
src/blitter/8bpp_optimized.cpp
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@ -71,24 +71,28 @@ void Blitter_8bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, Z
/* Skip transparent pixels */
dst += trans;
width -= trans;
if (width <= 0) continue;
if (width <= 0 || pixels == 0) continue;
pixels = min<uint>(pixels, (uint)width);
width -= pixels;
switch (mode) {
case BM_COLOUR_REMAP:
for (uint x = 0; x < pixels; x++) {
if (bp->remap[*src] != 0) *dst = bp->remap[*src];
case BM_COLOUR_REMAP: {
const uint8 *remap = bp->remap;
do {
uint m = remap[*src];
if (m != 0) *dst = m;
dst++; src++;
}
break;
} while (--pixels != 0);
} break;
case BM_TRANSPARENT:
for (uint x = 0; x < pixels; x++) {
*dst = bp->remap[*dst];
dst++; src++;
}
break;
case BM_TRANSPARENT: {
const uint8 *remap = bp->remap;
src += pixels;
do {
*dst = remap[*dst];
dst++;
} while (--pixels != 0);
} break;
default:
memcpy(dst, src, pixels);