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Add alpha-to-coverage GL parameter to effects code.

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This commit is contained in:
Stuart Buchanan 2012-09-25 22:51:37 +01:00
parent dc463d1c2c
commit 25130e3c82
1 changed files with 19 additions and 0 deletions
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19
simgear/scene/material/Effect.cxx
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@ -602,6 +602,24 @@ struct StencilBuilder : public PassAttributeBuilder
InstallAttributeBuilder<StencilBuilder> installStencil("stencil"); InstallAttributeBuilder<StencilBuilder> installStencil("stencil");
struct AlphaToCoverageBuilder : public PassAttributeBuilder
{
void buildAttribute(Effect* effect, Pass* pass, const SGPropertyNode* prop,
const SGReaderWriterOptions* options);
};
void AlphaToCoverageBuilder::buildAttribute(Effect* effect, Pass* pass,
const SGPropertyNode* prop,
const SGReaderWriterOptions* options)
{
const SGPropertyNode* realProp = getEffectPropertyNode(effect, prop);
if (!realProp)
return;
pass->setMode(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB, (realProp->getValue<bool>() ?
StateAttribute::ON : StateAttribute::OFF));
}
InstallAttributeBuilder<AlphaToCoverageBuilder> installAlphaToCoverage("alpha-to-coverage");
EffectNameValue<AlphaFunc::ComparisonFunction> alphaComparisonInit[] = EffectNameValue<AlphaFunc::ComparisonFunction> alphaComparisonInit[] =
{ {
@ -648,6 +666,7 @@ struct AlphaTestBuilder : public PassAttributeBuilder
"comparison"); "comparison");
const SGPropertyNode* pRef = getEffectPropertyChild(effect, prop, const SGPropertyNode* pRef = getEffectPropertyChild(effect, prop,
"reference"); "reference");
AlphaFunc::ComparisonFunction func = AlphaFunc::ALWAYS; AlphaFunc::ComparisonFunction func = AlphaFunc::ALWAYS;
float refValue = 1.0f; float refValue = 1.0f;
if (pComp) if (pComp)