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Implement the extension GL_AMD_texture_gather_bias_lod

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This commit is contained in:
Rex Xu
2016-11-17 17:47:59 +08:00
parent 94c18a84cd
commit 225e0fcadd
12 changed files with 770 additions and 11 deletions
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51
SPIRV/GlslangToSpv.cpp
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@@ -3044,7 +3044,7 @@ void TGlslangToSpvTraverser::translateArguments(const glslang::TIntermAggregate&
if (i == 6)
lvalue = true;
break;
case glslang::EOpSparseTextureGather:
case glslang::EOpSparseTextureGather:
if ((sampler.shadow && i == 3) || (! sampler.shadow && i == 2))
lvalue = true;
break;
@@ -3053,6 +3053,17 @@ void TGlslangToSpvTraverser::translateArguments(const glslang::TIntermAggregate&
if ((sampler.shadow && i == 4) || (! sampler.shadow && i == 3))
lvalue = true;
break;
#ifdef AMD_EXTENSIONS
case glslang::EOpSparseTextureGatherLod:
if (i == 3)
lvalue = true;
break;
case glslang::EOpSparseTextureGatherLodOffset:
case glslang::EOpSparseTextureGatherLodOffsets:
if (i == 4)
lvalue = true;
break;
#endif
default:
break;
}
@@ -3219,10 +3230,22 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
// check for bias argument
bool bias = false;
#ifdef AMD_EXTENSIONS
if (! cracked.lod && ! cracked.grad && ! cracked.fetch && ! cubeCompare) {
#else
if (! cracked.lod && ! cracked.gather && ! cracked.grad && ! cracked.fetch && ! cubeCompare) {
#endif
int nonBiasArgCount = 2;
#ifdef AMD_EXTENSIONS
if (cracked.gather)
++nonBiasArgCount; // comp argument should be present when bias argument is present
#endif
if (cracked.offset)
++nonBiasArgCount;
#ifdef AMD_EXTENSIONS
else if (cracked.offsets)
++nonBiasArgCount;
#endif
if (cracked.grad)
nonBiasArgCount += 2;
if (cracked.lodClamp)
@@ -3241,6 +3264,17 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
params.sampler = builder.createUnaryOp(spv::OpImage, builder.getImageType(params.sampler), params.sampler);
}
#ifdef AMD_EXTENSIONS
if (cracked.gather) {
const auto& sourceExtensions = glslangIntermediate->getRequestedExtensions();
if (bias || cracked.lod ||
sourceExtensions.find(glslang::E_GL_AMD_texture_gather_bias_lod) != sourceExtensions.end()) {
builder.addExtension(spv::E_SPV_AMD_texture_gather_bias_lod);
builder.addCapability(spv::OpCapabilityImageGatherBiasLodAMD);
}
}
#endif
// set the rest of the arguments
params.coords = arguments[1];
@@ -3308,21 +3342,20 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
++extraArgs;
}
// bias
if (bias) {
params.bias = arguments[2 + extraArgs];
++extraArgs;
}
// gather component
if (cracked.gather && ! sampler.shadow) {
// default component is 0, if missing, otherwise an argument
if (2 + extraArgs < (int)arguments.size()) {
params.component = arguments[2 + extraArgs];
++extraArgs;
} else {
} else
params.component = builder.makeIntConstant(0);
}
}
// bias
if (bias) {
params.bias = arguments[2 + extraArgs];
++extraArgs;
}
// projective component (might not to move)