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Hash : 07c03b6d
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Date : 2020-09-11T14:43:37
Validate GLSL attribute location range The location index of a vertex shader input's layout qualifier must be less than GL_MAX_VERTEX_ATTRIBS to link successfully. We can check for this during shader compilation to not rely on other layers to handle pathological cases. While strictly speaking only 'active' attributes are considered during shader linking, this is merely intended to allow for 'uber' shaders to declare more inputs than GL_MAX_VERTEX_ATTRIBS but only use a subset of them. There is no known reasonable use case for a manually specified location to exceed the valid range. Note that according to http://opengl.gpuinfo.org, the highest GL_MAX_VERTEX_ATTRIBS value at the time of writing is 32. Also, D3D12_VS_INPUT_REGISTER_COUNT = 32. Hence the unit test's value of 1000 should be sufficiently future proof. Also address the case where the uniform location might be close to INT_MAX and not be detected as out-of-range due to numeric overflow. Bug: chromium:1110800 Change-Id: I9985c8eab3bb8a2a59b8f985e8f5b6884756383c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2405368 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Nicolas Capens <capn@chromium.org>
