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

This commit is contained in:
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 */ /* Skip transparent pixels */
dst += trans; dst += trans;
width -= trans; width -= trans;
if (width <= 0) continue; if (width <= 0 || pixels == 0) continue;
pixels = min<uint>(pixels, (uint)width); pixels = min<uint>(pixels, (uint)width);
width -= pixels; width -= pixels;
switch (mode) { switch (mode) {
case BM_COLOUR_REMAP: case BM_COLOUR_REMAP: {
for (uint x = 0; x < pixels; x++) { const uint8 *remap = bp->remap;
if (bp->remap[*src] != 0) *dst = bp->remap[*src]; do {
uint m = remap[*src];
if (m != 0) *dst = m;
dst++; src++; dst++; src++;
} } while (--pixels != 0);
break; } break;
case BM_TRANSPARENT: case BM_TRANSPARENT: {
for (uint x = 0; x < pixels; x++) { const uint8 *remap = bp->remap;
*dst = bp->remap[*dst]; src += pixels;
dst++; src++; do {
} *dst = remap[*dst];
break; dst++;
} while (--pixels != 0);
} break;
default: default:
memcpy(dst, src, pixels); memcpy(dst, src, pixels);