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Implement GL_OES_shader_multisample_interpolation, as well as core desktop versions of it.

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This commit is contained in:
John Kessenich 2015-08-22 01:21:47 -06:00
parent ba01ebd5ba
commit 0fc4338f3e
17 changed files with 829 additions and 9 deletions
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28
glslang/MachineIndependent/ParseHelper.cpp
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@ -1485,6 +1485,30 @@ void TParseContext::builtInOpCheck(const TSourceLoc& loc, const TFunction& fnCan
break;
}
case EOpInterpolateAtCentroid:
case EOpInterpolateAtSample:
case EOpInterpolateAtOffset:
// "For the interpolateAt* functions, the call will return a precision
// qualification matching the precision of the 'interpolant' argument to
// the function call."
callNode.getQualifier().precision = arg0->getQualifier().precision;
// Make sure the first argument is an interpolant, or an array element of an interpolant
if (arg0->getType().getQualifier().storage != EvqVaryingIn) {
// It might still be an array element.
//
// We could check more, but the semantics of the first argument are already met; the
// only way to turn an array into a float/vec* is array dereference and swizzle.
//
// ES and desktop 4.3 and earlier: swizzles may not be used
// desktop 4.4 and later: swizzles may be used
bool swizzleOkay = (profile != EEsProfile) && (version >= 440);
const TIntermTyped* base = TIntermediate::findLValueBase(arg0, swizzleOkay);
if (base == nullptr || base->getType().getQualifier().storage != EvqVaryingIn)
error(loc, "first argument must be an interpolant, or interpolant-array element", fnCandidate.getName().c_str(), "");
}
break;
default:
break;
}
@ -2456,6 +2480,10 @@ void TParseContext::globalQualifierTypeCheck(const TSourceLoc& loc, const TQuali
error(loc, "cannot be a matrix", GetStorageQualifierString(qualifier.storage), "");
return;
}
if (qualifier.isAuxiliary())
error(loc, "can't use auxiliary qualifier on a fragment output", "centroid/sample/patch", "");
if (qualifier.isInterpolation())
error(loc, "can't use interpolation qualifier on a fragment output", "flat/smooth/noperspective", "");
break;
case EShLangCompute: