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authorsmatz <smatz@openttd.org>2008-06-21 20:58:34 +0000
committersmatz <smatz@openttd.org>2008-06-21 20:58:34 +0000
commit37b8e87454998049f8256bc76a9971202c828608 (patch)
treeb718988dd27389c460132e0db1f949cf4fae68eb /src
parent2ca4b8b2e4e51e174f149049298e5dd2d33c95e4 (diff)
downloadopenttd-37b8e87454998049f8256bc76a9971202c828608.tar.xz
(svn r13602) -Codechange: little speedup for 8bpp-optimized blitter
Diffstat (limited to 'src')
-rw-r--r--src/blitter/8bpp_optimized.cpp28
1 files changed, 16 insertions, 12 deletions
diff --git a/src/blitter/8bpp_optimized.cpp b/src/blitter/8bpp_optimized.cpp
index 3fb20e74b..656f910f2 100644
--- a/src/blitter/8bpp_optimized.cpp
+++ b/src/blitter/8bpp_optimized.cpp
@@ -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);