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Disallow mat3 formats in shader storage buffers.

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GLSL's std430 layout rules make it really unintuitive for users to deal with.
This commit is contained in:
Alex Szpakowski
2021-11-06 18:30:08 -03:00
parent 5c98cbdabd
commit a3ff9999d1
1 changed files with 13 additions and 5 deletions
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src/modules/graphics/Buffer.cpp
+13 -5
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@@ -154,11 +154,19 @@ Buffer::Buffer(Graphics *gfx, const Settings &settings, const std::vector<DataDe
// with R components each".
// "If the member is a three-component vector with components
// consuming N basic machine units, the base alignment is 4N."
int components = info.isMatrix ? info.matrixRows : info.components;
if (components == 3)
alignment = 4 * info.componentSize;
else
alignment = components * info.componentSize;
int c = info.isMatrix ? info.matrixRows : info.components;
alignment = c == 3 ? 4 * info.componentSize : c * info.componentSize;
// std430 will effectively turn a floatmat3x3 into a floatmat4x3
// because of its vec3 padding rules. For now we'd rather not
// support those formats at all, because it's not easy for users to
// deal with.
if (alignment != c * info.componentSize && (decl.arrayLength > 0 || info.isMatrix))
{
const char *fstr = "unknown";
getConstant(decl.format, fstr);
throw love::Exception("Data format %s%s is not currently supported in shader storage buffers.", fstr, decl.arrayLength > 0 ? " array" : "");
}
// "If the member is a structure, the base alignment of the structure
// is N, where N is the largest base alignment value of any of its