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Fix alignment of small pages

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This commit is contained in:
Brad Davis 2016-09-06 13:22:27 -07:00
parent f18b8f80fe
commit a9ba92f16c
1 changed files with 7 additions and 1 deletions
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8
libraries/gpu-gl/src/gpu/gl45/GL45BackendTexture.cpp
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@ -118,11 +118,17 @@ bool TransferState::increment() {
return false;
}
#define DEFAULT_GL_PIXEL_ALIGNMENT 4
void TransferState::populatePage(uint8_t* dst) {
uvec3 pageSize = currentPageSize();
auto bytesPerPageLine = _bytesPerPixel * pageSize.x;
if (0 != (bytesPerPageLine % DEFAULT_GL_PIXEL_ALIGNMENT)) {
bytesPerPageLine += DEFAULT_GL_PIXEL_ALIGNMENT - (bytesPerPageLine % DEFAULT_GL_PIXEL_ALIGNMENT);
assert(0 == (bytesPerPageLine % DEFAULT_GL_PIXEL_ALIGNMENT));
}
for (uint32_t y = 0; y < pageSize.y; ++y) {
uint32_t srcOffset = (_bytesPerLine * (_mipOffset.y + y)) + (_bytesPerPixel * _mipOffset.x);
uint32_t dstOffset = (_bytesPerPixel * pageSize.x) * y;
uint32_t dstOffset = bytesPerPageLine * y;
memcpy(dst + dstOffset, _srcPointer + srcOffset, pageSize.x * _bytesPerPixel);
}
}