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[dxvk] Add some component mapping helpers

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Philip Rebohle 2019-10-16 18:18:13 +02:00
parent 0d7f658f96
commit d998aaad12
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2 changed files with 69 additions and 0 deletions
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53
src/dxvk/dxvk_util.cpp
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@ -140,6 +140,59 @@ namespace dxvk::util {
} }
static VkComponentMapping normalizeComponentMapping(
VkComponentMapping mapping) {
mapping.r = mapping.r == VK_COMPONENT_SWIZZLE_IDENTITY ? VK_COMPONENT_SWIZZLE_R : mapping.r;
mapping.g = mapping.g == VK_COMPONENT_SWIZZLE_IDENTITY ? VK_COMPONENT_SWIZZLE_G : mapping.g;
mapping.b = mapping.b == VK_COMPONENT_SWIZZLE_IDENTITY ? VK_COMPONENT_SWIZZLE_B : mapping.b;
mapping.a = mapping.a == VK_COMPONENT_SWIZZLE_IDENTITY ? VK_COMPONENT_SWIZZLE_A : mapping.a;
return mapping;
}
static VkComponentSwizzle resolveComponentSwizzle(
VkComponentSwizzle swizzle,
VkComponentMapping dstMapping,
VkComponentMapping srcMapping) {
VkComponentSwizzle dstSwizzle = VK_COMPONENT_SWIZZLE_IDENTITY;
if (dstMapping.r == swizzle) dstSwizzle = VK_COMPONENT_SWIZZLE_R;
if (dstMapping.g == swizzle) dstSwizzle = VK_COMPONENT_SWIZZLE_G;
if (dstMapping.b == swizzle) dstSwizzle = VK_COMPONENT_SWIZZLE_B;
if (dstMapping.a == swizzle) dstSwizzle = VK_COMPONENT_SWIZZLE_A;
switch (dstSwizzle) {
case VK_COMPONENT_SWIZZLE_R: return srcMapping.r;
case VK_COMPONENT_SWIZZLE_G: return srcMapping.g;
case VK_COMPONENT_SWIZZLE_B: return srcMapping.b;
case VK_COMPONENT_SWIZZLE_A: return srcMapping.a;
default: return VK_COMPONENT_SWIZZLE_IDENTITY;
}
}
VkComponentMapping resolveSrcComponentMapping(
VkComponentMapping dstMapping,
VkComponentMapping srcMapping) {
dstMapping = normalizeComponentMapping(dstMapping);
VkComponentMapping result;
result.r = resolveComponentSwizzle(VK_COMPONENT_SWIZZLE_R, dstMapping, srcMapping);
result.g = resolveComponentSwizzle(VK_COMPONENT_SWIZZLE_G, dstMapping, srcMapping);
result.b = resolveComponentSwizzle(VK_COMPONENT_SWIZZLE_B, dstMapping, srcMapping);
result.a = resolveComponentSwizzle(VK_COMPONENT_SWIZZLE_A, dstMapping, srcMapping);
return result;
}
bool isIdentityMapping(
VkComponentMapping mapping) {
return (mapping.r == VK_COMPONENT_SWIZZLE_R || mapping.r == VK_COMPONENT_SWIZZLE_IDENTITY)
&& (mapping.g == VK_COMPONENT_SWIZZLE_G || mapping.g == VK_COMPONENT_SWIZZLE_IDENTITY)
&& (mapping.b == VK_COMPONENT_SWIZZLE_B || mapping.b == VK_COMPONENT_SWIZZLE_IDENTITY)
&& (mapping.a == VK_COMPONENT_SWIZZLE_A || mapping.a == VK_COMPONENT_SWIZZLE_IDENTITY);
}
uint32_t getComponentIndex( uint32_t getComponentIndex(
VkComponentSwizzle component, VkComponentSwizzle component,
uint32_t identity) { uint32_t identity) {

16
src/dxvk/dxvk_util.h
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@ -225,7 +225,23 @@ namespace dxvk::util {
*/ */
VkComponentMapping invertComponentMapping( VkComponentMapping invertComponentMapping(
VkComponentMapping mapping); VkComponentMapping mapping);
/**
* \brief Resolves source component mapping
*
* Returns the source component mapping after rearranging
* the destination mapping to be the identity mapping.
* \param [in] dstMapping Destination mapping
* \param [in] srcMapping Source mapping
* \returns Adjusted src component mapping
*/
VkComponentMapping resolveSrcComponentMapping(
VkComponentMapping dstMapping,
VkComponentMapping srcMapping);
bool isIdentityMapping(
VkComponentMapping mapping);
/** /**
* \brief Computes component index for a component swizzle * \brief Computes component index for a component swizzle
* *