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SPV: Fix array strides by explicitly computing them in the getBaseAlignment() algorithm.

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This commit is contained in:
John Kessenich
2015-12-29 17:11:44 -07:00
parent e0b6cad44f
commit 4998789d4e
9 changed files with 83 additions and 61 deletions
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25
SPIRV/GlslangToSpv.cpp
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@@ -1707,25 +1707,25 @@ glslang::TLayoutPacking TGlslangToSpvTraverser::getExplicitLayout(const glslang:
int TGlslangToSpvTraverser::getArrayStride(const glslang::TType& arrayType, glslang::TLayoutPacking explicitLayout, glslang::TLayoutMatrix matrixLayout)
{
int size;
int stride = glslangIntermediate->getBaseAlignment(arrayType, size, explicitLayout == glslang::ElpStd140, matrixLayout == glslang::ElmRowMajor);
if (arrayType.isMatrix()) {
// GLSL strides are set to alignments of the matrix flattened to individual rows/cols,
// but SPV needs an array stride for the whole matrix, not the rows/cols
if (matrixLayout == glslang::ElmRowMajor)
stride *= arrayType.getMatrixRows();
else
stride *= arrayType.getMatrixCols();
}
int stride;
glslangIntermediate->getBaseAlignment(arrayType, size, stride, explicitLayout == glslang::ElpStd140, matrixLayout == glslang::ElmRowMajor);
return stride;
}
// Given a matrix type, returns the integer stride required for that matrix
// Given a matrix type, or array (of array) of matrixes type, returns the integer stride required for that matrix
// when used as a member of an interface block
int TGlslangToSpvTraverser::getMatrixStride(const glslang::TType& matrixType, glslang::TLayoutPacking explicitLayout, glslang::TLayoutMatrix matrixLayout)
{
glslang::TType elementType;
elementType.shallowCopy(matrixType);
elementType.clearArraySizes();
int size;
return glslangIntermediate->getBaseAlignment(matrixType, size, explicitLayout == glslang::ElpStd140, matrixLayout == glslang::ElmRowMajor);
int stride;
glslangIntermediate->getBaseAlignment(elementType, size, stride, explicitLayout == glslang::ElpStd140, matrixLayout == glslang::ElmRowMajor);
return stride;
}
// Given a member type of a struct, realign the current offset for it, and compute
@@ -1764,7 +1764,8 @@ void TGlslangToSpvTraverser::updateMemberOffset(const glslang::TType& structType
// but possibly not yet correctly aligned.
int memberSize;
int memberAlignment = glslangIntermediate->getBaseAlignment(memberType, memberSize, explicitLayout == glslang::ElpStd140, matrixLayout == glslang::ElmRowMajor);
int dummyStride;
int memberAlignment = glslangIntermediate->getBaseAlignment(memberType, memberSize, dummyStride, explicitLayout == glslang::ElpStd140, matrixLayout == glslang::ElmRowMajor);
glslang::RoundToPow2(currentOffset, memberAlignment);
nextOffset = currentOffset + memberSize;
}