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Merge pull request #1019 from js6i/master

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MVKCmdCopyImage: adjust destination extent when it's compressed
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Bill Hollings 2020-09-10 10:05:16 -04:00 committed by GitHub
commit f3fd6986b6
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1 changed files with 7 additions and 0 deletions
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7
MoltenVK/MoltenVK/Commands/MVKCmdTransfer.mm
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@ -124,11 +124,18 @@ void MVKCmdCopyImage<N>::encode(MVKCommandEncoder* cmdEncoder, MVKCommandUse com
// Extent is provided in source texels. If the source is compressed but the
// destination is not, each destination pixel will consume an entire source block,
// so we must downscale the destination extent by the size of the source block.
// Likewise if the destination is compressed and source is not, each source pixel
// will map to a block of pixels in the destination texture, and we need to
// adjust destination's extent accordingly.
VkExtent3D dstExtent = vkIC.extent;
if (isSrcCompressed && !isDstCompressed) {
VkExtent2D srcBlockExtent = pixFmts->getBlockTexelSize(srcMTLPixFmt);
dstExtent.width /= srcBlockExtent.width;
dstExtent.height /= srcBlockExtent.height;
} else if (!isSrcCompressed && isDstCompressed) {
VkExtent2D dstBlockExtent = pixFmts->getBlockTexelSize(dstMTLPixFmt);
dstExtent.width *= dstBlockExtent.width;
dstExtent.height *= dstBlockExtent.height;
}
auto& dstCpy = vkDstCopies[copyIdx];
dstCpy.bufferOffset = tmpBuffSize;