Add Z mirroring support for image blit.

Bug: b/157926124 Change-Id: Iba985aa82cbda2d2d9778909d47abda2f0a7322b Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/45489 Presubmit-Ready: Alexis Hétu <sugoi@google.com> Kokoro-Result: kokoro <noreply+kokoro@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com> Tested-by: Ari Suonpää <ari.suonpaa@siru.fi>

Add Z mirroring support for image blit.
0711869b · Ari Suonpaa · Ari Suonpää · 3ad285a6 · 0711869b
Commit 0711869b authored Jun 02, 2020 by Ari Suonpaa Committed by Ari Suonpää Jun 04, 2020
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Blitter.cpp src/Device/Blitter.cpp +6 -0

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--- a/src/Device/Blitter.cpp
+++ b/src/Device/Blitter.cpp
@@ -1853,6 +1853,12 @@ void Blitter::blit(const vk::Image *src, vk::Image *dst, VkImageBlit region, VkF
 		std::swap(region.dstOffsets[0].y, region.dstOffsets[1].y);
 	}
+	if(region.dstOffsets[0].z > region.dstOffsets[1].z)
+	{
+		std::swap(region.srcOffsets[0].z, region.srcOffsets[1].z);
+		std::swap(region.dstOffsets[0].z, region.dstOffsets[1].z);
+	}
 	VkImageAspectFlagBits srcAspect = static_cast<VkImageAspectFlagBits>(region.srcSubresource.aspectMask);
 	VkImageAspectFlagBits dstAspect = static_cast<VkImageAspectFlagBits>(region.dstSubresource.aspectMask);
 	VkExtent3D srcExtent = src->getMipLevelExtent(srcAspect, region.srcSubresource.mipLevel);