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Some optimizations, use memset instead of for loop with *bl++=0.

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Uses almost 1% less CPU for me :-)
This commit is contained in:
Dabb 2001-02-20 16:52:24 +00:00
parent ea7e76fab7
commit 19c37bbcb3
1 changed files with 4 additions and 14 deletions
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18
source/gl_rsurf.c
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@ -235,29 +235,19 @@ R_BuildLightMap (msurface_t *surf, byte * dest, int stride)
// set to full bright if no light data // set to full bright if no light data
if (!cl.worldmodel->lightdata) { if (!cl.worldmodel->lightdata) {
bl = blocklights; memset (&blocklights[0], 255, size * 3 * sizeof (unsigned int));
for (i = 0; i < size; i++) {
*bl++ = 255 << 8;
*bl++ = 255 << 8;
*bl++ = 255 << 8;
}
goto store; goto store;
} }
// clear to no light // clear to no light
bl = blocklights;
for (i = 0; i < size; i++) { memset (&blocklights[0], 0, size * 3 * sizeof (unsigned int));
*bl++ = 0;
*bl++ = 0;
*bl++ = 0;
}
bl = blocklights;
// add all the lightmaps // add all the lightmaps
if (lightmap) { if (lightmap) {
for (maps = 0; maps < MAXLIGHTMAPS && surf->styles[maps] != 255; maps++) { for (maps = 0; maps < MAXLIGHTMAPS && surf->styles[maps] != 255; maps++) {
scale = d_lightstylevalue[surf->styles[maps]]; scale = d_lightstylevalue[surf->styles[maps]];
surf->cached_light[maps] = scale; // 8.8 fraction surf->cached_light[maps] = scale; // 8.8 fraction
bl = blocklights; bl=blocklights;
for (i = 0; i < size; i++) { for (i = 0; i < size; i++) {
*bl++ += *lightmap++ * scale; *bl++ += *lightmap++ * scale;
*bl++ += *lightmap++ * scale; *bl++ += *lightmap++ * scale;