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HLSL: Add SampleCmp and SampleCmpLevelZero texture methods

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This commit is contained in:
LoopDawg 2016-07-19 14:28:05 -06:00
parent 934855a642
commit a78b02941b
21 changed files with 5143 additions and 49 deletions
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61
hlsl/hlslParseHelper.cpp
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@ -825,6 +825,7 @@ TIntermAggregate* HlslParseContext::handleSamplerTextureCombine(const TSourceLoc
TSampler samplerType = argTex->getType().getSampler();
samplerType.combined = true;
samplerType.shadow = argSampler->getType().getSampler().shadow;
txcombine->setType(TType(samplerType, EvqTemporary));
txcombine->setLoc(loc);
@ -1063,6 +1064,66 @@ void HlslParseContext::decomposeSampleMethods(const TSourceLoc& loc, TIntermType
break;
}
case EOpMethodSampleCmp: // fall through...
case EOpMethodSampleCmpLevelZero:
{
TIntermTyped* argTex = argAggregate->getSequence()[0]->getAsTyped();
TIntermTyped* argSamp = argAggregate->getSequence()[1]->getAsTyped();
TIntermTyped* argCoord = argAggregate->getSequence()[2]->getAsTyped();
TIntermTyped* argCmpVal = argAggregate->getSequence()[3]->getAsTyped();
TIntermTyped* argOffset = nullptr;
// optional offset value
if (argAggregate->getSequence().size() > 4)
argOffset = argAggregate->getSequence()[4]->getAsTyped();
const int coordDimWithCmpVal = argCoord->getType().getVectorSize() + 1; // +1 for cmp
// AST wants comparison value as one of the texture coordinates
TOperator constructOp = EOpNull;
switch (coordDimWithCmpVal) {
// 1D can't happen: there's always at least 1 coordinate dimension + 1 cmp val
case 2: constructOp = EOpConstructVec2; break;
case 3: constructOp = EOpConstructVec3; break;
case 4: constructOp = EOpConstructVec4; break;
case 5: constructOp = EOpConstructVec4; break; // cubeArrayShadow, cmp value is separate arg.
default: assert(0); break;
}
TIntermAggregate* coordWithCmp = new TIntermAggregate(constructOp);
coordWithCmp->getSequence().push_back(argCoord);
if (coordDimWithCmpVal != 5) // cube array shadow is special.
coordWithCmp->getSequence().push_back(argCmpVal);
coordWithCmp->setLoc(loc);
TOperator textureOp = (op == EOpMethodSampleCmpLevelZero ? EOpTextureLod : EOpTexture);
if (argOffset != nullptr)
textureOp = (op == EOpMethodSampleCmpLevelZero ? EOpTextureLodOffset : EOpTextureOffset);
// Create combined sampler & texture op
TIntermAggregate* txcombine = handleSamplerTextureCombine(loc, argTex, argSamp);
TIntermAggregate* txsample = new TIntermAggregate(textureOp);
txsample->getSequence().push_back(txcombine);
txsample->getSequence().push_back(coordWithCmp);
if (coordDimWithCmpVal == 5) // cube array shadow is special: cmp val follows coord.
txsample->getSequence().push_back(argCmpVal);
// the LevelZero form uses 0 as an explicit LOD
if (op == EOpMethodSampleCmpLevelZero)
txsample->getSequence().push_back(intermediate.addConstantUnion(0.0, EbtFloat, loc, true));
// Add offset if present
if (argOffset != nullptr)
txsample->getSequence().push_back(argOffset);
txsample->setType(node->getType());
txsample->setLoc(loc);
node = txsample;
break;
}
default:
break; // most pass through unchanged
}