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HLSL: Add GatherRed/Green/Blue/Alpha methods, inc 4-offset forms

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This commit is contained in:
steve-lunarg 2016-07-31 10:37:02 -06:00
parent 98a2e92f0c
commit 7dfcf4d1ad
16 changed files with 5046 additions and 11 deletions
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137
hlsl/hlslParseHelper.cpp
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@ -581,6 +581,15 @@ TIntermTyped* HlslParseContext::handleDotDereference(const TSourceLoc& loc, TInt
} else if (field == "CalculateLevelOfDetail" ||
field == "CalculateLevelOfDetailUnclamped" ||
field == "Gather" ||
field == "GatherRed" ||
field == "GatherGreen" ||
field == "GatherBlue" ||
field == "GatherAlpha" ||
field == "GatherCmp" ||
field == "GatherCmpRed" ||
field == "GatherCmpGreen" ||
field == "GatherCmpBlue" ||
field == "GatherCmpAlpha" ||
field == "GetDimensions" ||
field == "GetSamplePosition" ||
field == "Load" ||
@ -1251,7 +1260,7 @@ void HlslParseContext::decomposeSampleMethods(const TSourceLoc& loc, TIntermType
TIntermTyped* argOffset = nullptr;
// Offset is optional
if (argAggregate->getSequence().size() == 4)
if (argAggregate->getSequence().size() > 3)
argOffset = argAggregate->getSequence()[3]->getAsTyped();
const TOperator textureOp = (argOffset == nullptr ? EOpTextureGather : EOpTextureGatherOffset);
@ -1261,6 +1270,7 @@ void HlslParseContext::decomposeSampleMethods(const TSourceLoc& loc, TIntermType
txgather->getSequence().push_back(txcombine);
txgather->getSequence().push_back(argCoord);
// Offset if not given is implicitly channel 0 (red)
if (argOffset != nullptr)
txgather->getSequence().push_back(argOffset);
@ -1272,6 +1282,131 @@ void HlslParseContext::decomposeSampleMethods(const TSourceLoc& loc, TIntermType
break;
}
case EOpMethodGatherRed: // fall through...
case EOpMethodGatherGreen: // ...
case EOpMethodGatherBlue: // ...
case EOpMethodGatherAlpha: // ...
case EOpMethodGatherCmpRed: // ...
case EOpMethodGatherCmpGreen: // ...
case EOpMethodGatherCmpBlue: // ...
case EOpMethodGatherCmpAlpha: // ...
{
int channel = 0; // the channel we are gathering
int cmpValues = 0; // 1 if there is a compare value (handier than a bool below)
switch (op) {
case EOpMethodGatherCmpRed: cmpValues = 1; // fall through
case EOpMethodGatherRed: channel = 0; break;
case EOpMethodGatherCmpGreen: cmpValues = 1; // fall through
case EOpMethodGatherGreen: channel = 1; break;
case EOpMethodGatherCmpBlue: cmpValues = 1; // fall through
case EOpMethodGatherBlue: channel = 2; break;
case EOpMethodGatherCmpAlpha: cmpValues = 1; // fall through
case EOpMethodGatherAlpha: channel = 3; break;
default: assert(0); break;
}
// For now, we have nothing to map the component-wise comparison forms
// to, because neither GLSL nor SPIR-V has such an opcode. Issue an
// unimplemented error instead. Most of the machinery is here if that
// should ever become available.
if (cmpValues) {
error(loc, "unimplemented: component-level gather compare", "", "");
return;
}
int arg = 0;
TIntermTyped* argTex = argAggregate->getSequence()[arg++]->getAsTyped();
TIntermTyped* argSamp = argAggregate->getSequence()[arg++]->getAsTyped();
TIntermTyped* argCoord = argAggregate->getSequence()[arg++]->getAsTyped();
TIntermTyped* argOffset = nullptr;
TIntermTyped* argOffsets[4] = { nullptr, nullptr, nullptr, nullptr };
// TIntermTyped* argStatus = nullptr; // TODO: residency
TIntermTyped* argCmp = nullptr;
const TSamplerDim dim = argTex->getType().getSampler().dim;
const int argSize = argAggregate->getSequence().size();
bool hasStatus = (argSize == (5+cmpValues) || argSize == (8+cmpValues));
bool hasOffset1 = false;
bool hasOffset4 = false;
// Only 2D forms can have offsets. Discover if we have 0, 1 or 4 offsets.
if (dim == Esd2D) {
hasOffset1 = (argSize == (4+cmpValues) || argSize == (5+cmpValues));
hasOffset4 = (argSize == (7+cmpValues) || argSize == (8+cmpValues));
}
assert(!(hasOffset1 && hasOffset4));
TOperator textureOp = EOpTextureGather;
// Compare forms have compare value
if (cmpValues != 0)
argCmp = argOffset = argAggregate->getSequence()[arg++]->getAsTyped();
// Some forms have single offset
if (hasOffset1) {
textureOp = EOpTextureGatherOffset; // single offset form
argOffset = argAggregate->getSequence()[arg++]->getAsTyped();
}
// Some forms have 4 gather offsets
if (hasOffset4) {
textureOp = EOpTextureGatherOffsets; // note plural, for 4 offset form
for (int offsetNum = 0; offsetNum < 4; ++offsetNum)
argOffsets[offsetNum] = argAggregate->getSequence()[arg++]->getAsTyped();
}
// Residency status
if (hasStatus) {
// argStatus = argAggregate->getSequence()[arg++]->getAsTyped();
error(loc, "unimplemented: residency status", "", "");
return;
}
TIntermAggregate* txgather = new TIntermAggregate(textureOp);
TIntermAggregate* txcombine = handleSamplerTextureCombine(loc, argTex, argSamp);
TIntermTyped* argChannel = intermediate.addConstantUnion(channel, loc, true);
txgather->getSequence().push_back(txcombine);
txgather->getSequence().push_back(argCoord);
// AST wants an array of 4 offsets, where HLSL has separate args. Here
// we construct an array from the separate args.
if (hasOffset4) {
TType arrayType(EbtInt, EvqTemporary, 2);
TArraySizes arraySizes;
arraySizes.addInnerSize(4);
arrayType.newArraySizes(arraySizes);
TIntermAggregate* initList = new TIntermAggregate(EOpNull);
for (int offsetNum = 0; offsetNum < 4; ++offsetNum)
initList->getSequence().push_back(argOffsets[offsetNum]);
argOffset = addConstructor(loc, initList, arrayType);
}
// Add comparison value if we have one
if (argTex->getType().getSampler().isShadow())
txgather->getSequence().push_back(argCmp);
// Add offset (either 1, or an array of 4) if we have one
if (argOffset != nullptr)
txgather->getSequence().push_back(argOffset);
txgather->getSequence().push_back(argChannel);
txgather->setType(node->getType());
txgather->setLoc(loc);
node = txgather;
break;
}
case EOpMethodCalculateLevelOfDetail:
case EOpMethodCalculateLevelOfDetailUnclamped:
{