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[dxvk] Add new helper function to compute mip level extent

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We're going to need this outside the DxvkImage class as well.
This commit is contained in:
Philip Rebohle 2019-05-20 14:27:00 +02:00
parent cdc5e93dac
commit a82dbf6200
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2 changed files with 15 additions and 5 deletions
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6
src/dxvk/dxvk_image.h
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@ -190,11 +190,7 @@ namespace dxvk {
* \returns Size of that level * \returns Size of that level
*/ */
VkExtent3D mipLevelExtent(uint32_t level) const { VkExtent3D mipLevelExtent(uint32_t level) const {
VkExtent3D size = m_info.extent; return util::computeMipLevelExtent(m_info.extent, level);
size.width = std::max(1u, size.width >> level);
size.height = std::max(1u, size.height >> level);
size.depth = std::max(1u, size.depth >> level);
return size;
} }
/** /**

14
src/dxvk/dxvk_util.h
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@ -87,6 +87,20 @@ namespace dxvk::util {
&& ((extent.depth % blockSize.depth == 0) || (uint32_t(offset.z + extent.depth) == imageSize.depth)); && ((extent.depth % blockSize.depth == 0) || (uint32_t(offset.z + extent.depth) == imageSize.depth));
} }
/**
* \brief Computes mip level extent
*
* \param [in] size Base mip level extent
* \param [in] level mip level to compute
* \returns Extent of the given mip level
*/
inline VkExtent3D computeMipLevelExtent(VkExtent3D size, uint32_t level) {
size.width = std::max(1u, size.width >> level);
size.height = std::max(1u, size.height >> level);
size.depth = std::max(1u, size.depth >> level);
return size;
}
/** /**
* \brief Computes block offset for compressed images * \brief Computes block offset for compressed images
* *