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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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129
glslang/MachineIndependent/Initialize.cpp
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@ -3844,6 +3844,7 @@ void TBuiltIns::add2ndGenerationSamplingImaging(int version, EProfile profile, c
else {
addSamplingFunctions(sampler, typeName, version, profile);
addGatherFunctions(sampler, typeName, version, profile);
if (spvVersion.vulkan > 0 && sampler.dim == EsdBuffer && sampler.isCombined()) {
// Vulkan wants a textureBuffer to allow texelFetch() --
// a sampled image with no sampler.
@ -4349,6 +4350,7 @@ void TBuiltIns::addGatherFunctions(TSampler sampler, const TString& typeName, in
default:
break;
}
if (sparse)
s.append("ARB");
s.append("(");
@ -4388,6 +4390,116 @@ void TBuiltIns::addGatherFunctions(TSampler sampler, const TString& typeName, in
}
}
}
#ifdef AMD_EXTENSIONS
if (sampler.dim == EsdRect || sampler.shadow)
return;
if (profile == EEsProfile || version < 450)
return;
for (int bias = 0; bias < 2; ++bias) { // loop over presence of bias argument
for (int lod = 0; lod < 2; ++lod) { // loop over presence of lod argument
if ((lod && bias) || (lod == 0 && bias == 0))
continue;
for (int offset = 0; offset < 3; ++offset) { // loop over three forms of offset in the call name: none, Offset, and Offsets
for (int comp = 0; comp < 2; ++comp) { // loop over presence of comp argument
if (comp == 0 && bias)
continue;
if (offset > 0 && sampler.dim == EsdCube)
continue;
for (int sparse = 0; sparse <= 1; ++sparse) { // loop over "bool" sparse or not
if (sparse && (profile == EEsProfile || version < 450))
continue;
TString s;
// return type
if (sparse)
s.append("int ");
else {
s.append(prefixes[sampler.type]);
s.append("vec4 ");
}
// name
if (sparse)
s.append("sparseTextureGather");
else
s.append("textureGather");
if (lod)
s.append("Lod");
switch (offset) {
case 1:
s.append("Offset");
break;
case 2:
s.append("Offsets");
default:
break;
}
if (lod)
s.append("AMD");
else if (sparse)
s.append("ARB");
s.append("(");
// sampler type argument
s.append(typeName);
// P coordinate argument
s.append(",vec");
int totalDims = dimMap[sampler.dim] + (sampler.arrayed ? 1 : 0);
s.append(postfixes[totalDims]);
// lod argument
if (lod)
s.append(",float");
// offset argument
if (offset > 0) {
s.append(",ivec2");
if (offset == 2)
s.append("[4]");
}
// texel out (for sparse texture)
if (sparse) {
s.append(",out ");
s.append(prefixes[sampler.type]);
s.append("vec4 ");
}
// comp argument
if (comp)
s.append(",int");
// bias argument
if (bias)
s.append(",float");
s.append(");\n");
if (bias)
stageBuiltins[EShLangFragment].append(s);
else
commonBuiltins.append(s);
}
}
}
}
}
#endif
}
//
@ -5366,6 +5478,16 @@ void TBuiltIns::identifyBuiltIns(int version, EProfile profile, const SpvVersion
BuiltInVariable("gl_BaryCoordSmoothSampleAMD", EbvBaryCoordSmoothSample, symbolTable);
BuiltInVariable("gl_BaryCoordPullModelAMD", EbvBaryCoordPullModel, symbolTable);
}
// E_GL_AMD_texture_gather_bias_lod
if (profile != EEsProfile) {
symbolTable.setFunctionExtensions("textureGatherLodAMD", 1, &E_GL_AMD_texture_gather_bias_lod);
symbolTable.setFunctionExtensions("textureGatherLodOffsetAMD", 1, &E_GL_AMD_texture_gather_bias_lod);
symbolTable.setFunctionExtensions("textureGatherLodOffsetsAMD", 1, &E_GL_AMD_texture_gather_bias_lod);
symbolTable.setFunctionExtensions("sparseTextureGatherLodAMD", 1, &E_GL_AMD_texture_gather_bias_lod);
symbolTable.setFunctionExtensions("sparseTextureGatherLodOffsetAMD", 1, &E_GL_AMD_texture_gather_bias_lod);
symbolTable.setFunctionExtensions("sparseTextureGatherLodOffsetsAMD", 1, &E_GL_AMD_texture_gather_bias_lod);
}
#endif
symbolTable.setVariableExtensions("gl_FragDepthEXT", 1, &E_GL_EXT_frag_depth);
@ -5752,6 +5874,13 @@ void TBuiltIns::identifyBuiltIns(int version, EProfile profile, const SpvVersion
symbolTable.relateToOperator("cubeFaceIndexAMD", EOpCubeFaceIndex);
symbolTable.relateToOperator("cubeFaceCoordAMD", EOpCubeFaceCoord);
symbolTable.relateToOperator("timeAMD", EOpTime);
symbolTable.relateToOperator("textureGatherLodAMD", EOpTextureGatherLod);
symbolTable.relateToOperator("textureGatherLodOffsetAMD", EOpTextureGatherLodOffset);
symbolTable.relateToOperator("textureGatherLodOffsetsAMD", EOpTextureGatherLodOffsets);
symbolTable.relateToOperator("sparseTextureGatherLodAMD", EOpSparseTextureGatherLod);
symbolTable.relateToOperator("sparseTextureGatherLodOffsetAMD", EOpSparseTextureGatherLodOffset);
symbolTable.relateToOperator("sparseTextureGatherLodOffsetsAMD", EOpSparseTextureGatherLodOffsets);
#endif
}
}