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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
glslang/MachineIndependent/ParseHelper.cpp
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@ -1295,7 +1295,7 @@ TIntermTyped* TParseContext::handleBuiltInFunctionCall(TSourceLoc loc, TIntermNo
TIntermTyped *result = intermediate.addBuiltInFunctionCall(loc, function.getBuiltInOp(),
function.getParamCount() == 1,
arguments, function.getType());
if (obeyPrecisionQualifiers())
if (result != nullptr && obeyPrecisionQualifiers())
computeBuiltinPrecisions(*result, function);
if (result == nullptr) {