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Parser & SPV: Implement two extensions regarding GLSL sparse texture.

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Implement extension "GL_ARB_sparse_texture2".
Implement extension "GL_ARB_sparse_texture_clamp".
This commit is contained in:
Rex Xu
2015-12-31 16:11:41 +08:00
parent e23c9849c2
commit 48edadfd24
12 changed files with 1621 additions and 151 deletions
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84
SPIRV/SpvBuilder.cpp
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@@ -1222,7 +1222,7 @@ Id Builder::createBuiltinCall(Decoration /*precision*/, Id resultType, Id builti
// Accept all parameters needed to create a texture instruction.
// Create the correct instruction based on the inputs, and make the call.
Id Builder::createTextureCall(Decoration precision, Id resultType, bool fetch, bool proj, bool gather, const TextureParameters& parameters)
Id Builder::createTextureCall(Decoration precision, Id resultType, bool sparse, bool fetch, bool proj, bool gather, const TextureParameters& parameters)
{
static const int maxTextureArgs = 10;
Id texArgs[maxTextureArgs] = {};
@@ -1275,6 +1275,10 @@ Id Builder::createTextureCall(Decoration precision, Id resultType, bool fetch, b
mask = (ImageOperandsMask)(mask | ImageOperandsSampleMask);
texArgs[numArgs++] = parameters.sample;
}
if (parameters.lodClamp) {
mask = (ImageOperandsMask)(mask | ImageOperandsMinLodMask);
texArgs[numArgs++] = parameters.lodClamp;
}
if (mask == ImageOperandsMaskNone)
--numArgs; // undo speculative reservation for the mask argument
else
@@ -1286,35 +1290,68 @@ Id Builder::createTextureCall(Decoration precision, Id resultType, bool fetch, b
Op opCode;
opCode = OpImageSampleImplicitLod;
if (fetch) {
opCode = OpImageFetch;
if (sparse)
opCode = OpImageSparseFetch;
else
opCode = OpImageFetch;
} else if (gather) {
if (parameters.Dref)
opCode = OpImageDrefGather;
if (sparse)
opCode = OpImageSparseDrefGather;
else
opCode = OpImageDrefGather;
else
opCode = OpImageGather;
if (sparse)
opCode = OpImageSparseGather;
else
opCode = OpImageGather;
} else if (xplicit) {
if (parameters.Dref) {
if (proj)
opCode = OpImageSampleProjDrefExplicitLod;
if (sparse)
opCode = OpImageSparseSampleProjDrefExplicitLod;
else
opCode = OpImageSampleProjDrefExplicitLod;
else
opCode = OpImageSampleDrefExplicitLod;
if (sparse)
opCode = OpImageSparseSampleDrefExplicitLod;
else
opCode = OpImageSampleDrefExplicitLod;
} else {
if (proj)
opCode = OpImageSampleProjExplicitLod;
if (sparse)
opCode = OpImageSparseSampleProjExplicitLod;
else
opCode = OpImageSampleProjExplicitLod;
else
opCode = OpImageSampleExplicitLod;
if (sparse)
opCode = OpImageSparseSampleExplicitLod;
else
opCode = OpImageSampleExplicitLod;
}
} else {
if (parameters.Dref) {
if (proj)
opCode = OpImageSampleProjDrefImplicitLod;
if (sparse)
opCode = OpImageSparseSampleProjDrefImplicitLod;
else
opCode = OpImageSampleProjDrefImplicitLod;
else
opCode = OpImageSampleDrefImplicitLod;
if (sparse)
opCode = OpImageSparseSampleDrefImplicitLod;
else
opCode = OpImageSampleDrefImplicitLod;
} else {
if (proj)
opCode = OpImageSampleProjImplicitLod;
if (sparse)
opCode = OpImageSparseSampleProjImplicitLod;
else
opCode = OpImageSampleProjImplicitLod;
else
opCode = OpImageSampleImplicitLod;
if (sparse)
opCode = OpImageSparseSampleImplicitLod;
else
opCode = OpImageSampleImplicitLod;
}
}
@@ -1335,6 +1372,15 @@ Id Builder::createTextureCall(Decoration precision, Id resultType, bool fetch, b
}
}
Id typeId0 = 0;
Id typeId1 = 0;
if (sparse) {
typeId0 = resultType;
typeId1 = getDerefTypeId(parameters.texelOut);
resultType = makeStructResultType(typeId0, typeId1);
}
// Build the SPIR-V instruction
Instruction* textureInst = new Instruction(getUniqueId(), resultType, opCode);
for (int op = 0; op < optArgNum; ++op)
@@ -1348,10 +1394,16 @@ Id Builder::createTextureCall(Decoration precision, Id resultType, bool fetch, b
Id resultId = textureInst->getResultId();
// When a smear is needed, do it, as per what was computed
// above when resultType was changed to a scalar type.
if (resultType != smearedType)
resultId = smearScalar(precision, resultId, smearedType);
if (sparse) {
// Decode the return type that was a special structure
createStore(createCompositeExtract(resultId, typeId1, 1), parameters.texelOut);
resultId = createCompositeExtract(resultId, typeId0, 0);
} else {
// When a smear is needed, do it, as per what was computed
// above when resultType was changed to a scalar type.
if (resultType != smearedType)
resultId = smearScalar(precision, resultId, smearedType);
}
return resultId;
}