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[d3d11] Optimized texture image layouts

This commit is contained in:
Philip Rebohle 2018-01-01 19:03:05 +01:00
parent 4fc2ea25b8
commit 5ceb041a49
1 changed files with 36 additions and 0 deletions
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36
src/d3d11/d3d11_texture.cpp
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@ -23,6 +23,39 @@ namespace dxvk {
}
/**
* \brief Optimizes image layout based on usage flags
*
* \param [in] flags Image usage flag
* \returns Optimized image layout
*/
static VkImageLayout OptimizeLayout(VkImageUsageFlags flags) {
// Filter out unnecessary flags. Transfer operations
// are handled by the backend in a transparent manner.
flags &= ~(VK_IMAGE_USAGE_TRANSFER_DST_BIT
| VK_IMAGE_USAGE_TRANSFER_SRC_BIT);
// If the image is used only as an attachment, we never
// have to transform the image back to a different layout
if (flags == VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT)
return VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
if (flags == VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT)
return VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
flags &= ~(VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
| VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT);
// If the image is used for reading but not as a storage
// image, we can optimize the image for texture access
if (flags == VK_IMAGE_USAGE_SAMPLED_BIT)
return VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
// Otherwise, we have to stick with the default layout
return VK_IMAGE_LAYOUT_GENERAL;
}
/**
* \brief Fills in image info stage and access flags
*
@ -83,6 +116,9 @@ namespace dxvk {
if (pImageInfo->mipLevels == 0)
pImageInfo->mipLevels = util::computeMipLevelCount(pImageInfo->extent);
if (pImageInfo->tiling == VK_IMAGE_TILING_OPTIMAL)
pImageInfo->layout = OptimizeLayout(pImageInfo->usage);
}