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fix fog color bug

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This commit is contained in:
Brian Paul 2006-10-17 22:22:42 +00:00
parent c2074645cd
commit 32c3243e4d
1 changed files with 18 additions and 3 deletions
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21
src/mesa/swrast/s_fog.c
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@ -110,15 +110,30 @@ void
_swrast_fog_rgba_span( const GLcontext *ctx, SWspan *span )
{
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
const GLfloat rFog = ctx->Fog.Color[RCOMP] * CHAN_MAX;
const GLfloat gFog = ctx->Fog.Color[GCOMP] * CHAN_MAX;
const GLfloat bFog = ctx->Fog.Color[BCOMP] * CHAN_MAX;
GLfloat rFog, gFog, bFog;
const GLuint haveW = (span->interpMask & SPAN_W);
ASSERT(swrast->_FogEnabled);
ASSERT((span->interpMask | span->arrayMask) & SPAN_FOG);
ASSERT(span->arrayMask & SPAN_RGBA);
if (span->array->ChanType == GL_UNSIGNED_BYTE) {
rFog = ctx->Fog.Color[RCOMP] * 255.0;
gFog = ctx->Fog.Color[GCOMP] * 255.0;
bFog = ctx->Fog.Color[BCOMP] * 255.0;
}
else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
rFog = ctx->Fog.Color[RCOMP] * 65535.0;
gFog = ctx->Fog.Color[GCOMP] * 65535.0;
bFog = ctx->Fog.Color[BCOMP] * 65535.0;
}
else {
rFog = ctx->Fog.Color[RCOMP];
gFog = ctx->Fog.Color[GCOMP];
bFog = ctx->Fog.Color[BCOMP];
}
/* NOTE: if haveW is true, that means the fog start/step values are
* perspective-corrected and we have to divide each fog coord by W.
*/