Implement the extension GL_AMD_texture_gather_bias_lod
diff --git a/SPIRV/GlslangToSpv.cpp b/SPIRV/GlslangToSpv.cpp
index e175bfc..f6c3e5d 100755
--- a/SPIRV/GlslangToSpv.cpp
+++ b/SPIRV/GlslangToSpv.cpp
@@ -3044,7 +3044,7 @@
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 @@
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 @@
// 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 @@
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 @@
++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)