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Fix overflow when texture size is smaller than block size #3501

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Fix overflow when texture size is smaller than block size #3501

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4 changes: 3 additions & 1 deletion renderdoc/driver/gl/wrappers/gl_texture_funcs.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3813,7 +3813,9 @@ void WrappedOpenGL::StoreCompressedTexData(ResourceId texId, GLenum target, GLin
// GetCompressedByteSize() will factor in the 'partial' blocks at image edges when the
// image size is not an integer multiple of the block size, so we need to take into
// account that in the loop
size_t roundedUpHeight = AlignUp((uint32_t)height, blockSize[1]);
size_t roundedUpHeight = (uint32_t)height < blockSize[1]
? (uint32_t)height
: AlignUp((uint32_t)height, blockSize[1]);
for(size_t y = 0; y < roundedUpHeight; y += blockSize[1])
{
memcpy(cdData.data() + dstOffset, srcPixels + srcOffset, srcRowSize);
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