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SPV: RelaxedPrecision: use the result precision for texture sampling.

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Fix #2298.

The AST has two precisions, an operation precision and a result precision.
Actual use of GLSL with mediump samplers wants the result precision, so
pick that up instead of the operation precision.
This commit is contained in:
John Kessenich 2020-06-30 07:52:05 -06:00
parent 90f1d6ab58
commit 12c155f303
5 changed files with 147 additions and 2 deletions
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2
SPIRV/GlslangToSpv.cpp
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@ -4730,7 +4730,7 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
translateArguments(*node->getAsAggregate(), arguments, lvalueCoherentFlags);
else
translateArguments(*node->getAsUnaryNode(), arguments);
spv::Decoration precision = TranslatePrecisionDecoration(node->getOperationPrecision());
spv::Decoration precision = TranslatePrecisionDecoration(node->getType());
spv::Builder::TextureParameters params = { };
params.sampler = arguments[0];