C Specification
If the pipeline’s
VkPipelineMultisampleStateCreateInfo::rasterizationSamples is
greater than the VkAttachmentDescription::samples of the color
attachments in the subpass, then the fragment’s coverage is reduced from
rasterizationSamples bits to a color sample mask with
VkAttachmentDescription::samples bits.
When the VK_NV_coverage_reduction_mode extension is enabled, the pipeline
state controlling coverage reduction is specified through the members of the
VkPipelineCoverageReductionStateCreateInfoNV structure.
The VkPipelineCoverageReductionStateCreateInfoNV structure is defined
as:
// Provided by VK_NV_coverage_reduction_mode
typedef struct VkPipelineCoverageReductionStateCreateInfoNV {
VkStructureType sType;
const void* pNext;
VkPipelineCoverageReductionStateCreateFlagsNV flags;
VkCoverageReductionModeNV coverageReductionMode;
} VkPipelineCoverageReductionStateCreateInfoNV;
Members
-
sTypeis the type of this structure. -
pNextisNULLor a pointer to a structure extending this structure. -
flagsis reserved for future use. -
coverageReductionModeis a VkCoverageReductionModeNV value controlling how the color sample mask is generated from the coverage mask.
Description
If this structure is not present, the default coverage reduction mode is inferred as follows:
-
If the
VK_NV_framebuffer_mixed_samplesextension is enabled, then it is as if thecoverageReductionModeisVK_COVERAGE_REDUCTION_MODE_MERGE_NV. -
If the
VK_AMD_mixed_attachment_samplesextension is enabled, then it is as if thecoverageReductionModeisVK_COVERAGE_REDUCTION_MODE_TRUNCATE_NV. -
If both
VK_NV_framebuffer_mixed_samplesandVK_AMD_mixed_attachment_samplesare enabled, then the default coverage reduction mode is implementation-dependent.
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.