SPV: Use SampledImage with OpImageQueryLod

Khronos SPIR-V issue #74

1 files changed, 3 insertions, 2 deletions

diff --git a/SPIRV/GlslangToSpv.cpp b/SPIRV/GlslangToSpv.cpp
index 9c8b8b93..245715fc 100755
--- a/SPIRV/GlslangToSpv.cpp
+++ b/SPIRV/GlslangToSpv.cpp
@@ -2745,9 +2745,10 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
 
     // Check for queries
     if (cracked.query) {
-        // a sampled image needs to have the image extracted first
-        if (builder.isSampledImage(params.sampler))
+        // OpImageQueryLod works on a sampled image, for other queries the image has to be extracted first
+        if (node->getOp() != glslang::EOpTextureQueryLod && builder.isSampledImage(params.sampler))
             params.sampler = builder.createUnaryOp(spv::OpImage, builder.getImageType(params.sampler), params.sampler);
+
         switch (node->getOp()) {
         case glslang::EOpImageQuerySize:
         case glslang::EOpTextureQuerySize: