## C Specification

If the pNext chain of VkPipelineRasterizationStateCreateInfo includes a VkPipelineRasterizationConservativeStateCreateInfoEXT structure, then that structure includes parameters controlling conservative rasterization.

VkPipelineRasterizationConservativeStateCreateInfoEXT is defined as:

// Provided by VK_EXT_conservative_rasterization
typedef struct VkPipelineRasterizationConservativeStateCreateInfoEXT {
VkStructureType                                           sType;
const void*                                               pNext;
VkPipelineRasterizationConservativeStateCreateFlagsEXT    flags;
VkConservativeRasterizationModeEXT                        conservativeRasterizationMode;
float                                                     extraPrimitiveOverestimationSize;
} VkPipelineRasterizationConservativeStateCreateInfoEXT;

## Members

• sType is the type of this structure.

• pNext is NULL or a pointer to a structure extending this structure.

• flags is reserved for future use.

• conservativeRasterizationMode is the conservative rasterization mode to use.

• extraPrimitiveOverestimationSize is the extra size in pixels to increase the generating primitive during conservative rasterization at each of its edges in X and Y equally in screen space beyond the base overestimation specified in VkPhysicalDeviceConservativeRasterizationPropertiesEXT::primitiveOverestimationSize. If conservativeRasterizationMode is not VK_CONSERVATIVE_RASTERIZATION_MODE_OVERESTIMATE_EXT, this value is ignored.

## Description

If this structure is not included in the pNext chain, conservativeRasterizationMode is considered to be VK_CONSERVATIVE_RASTERIZATION_MODE_DISABLED_EXT, and and conservative rasterization is disabled.

Polygon rasterization can be made conservative by setting conservativeRasterizationMode to VK_CONSERVATIVE_RASTERIZATION_MODE_OVERESTIMATE_EXT or VK_CONSERVATIVE_RASTERIZATION_MODE_UNDERESTIMATE_EXT in VkPipelineRasterizationConservativeStateCreateInfoEXT.

 Note If conservativePointAndLineRasterization is supported, conservative rasterization can be applied to line and point primitives, otherwise it must be disabled.
Valid Usage
• VUID-VkPipelineRasterizationConservativeStateCreateInfoEXT-extraPrimitiveOverestimationSize-01769
extraPrimitiveOverestimationSize must be in the range of 0.0 to VkPhysicalDeviceConservativeRasterizationPropertiesEXT::maxExtraPrimitiveOverestimationSize inclusive

Valid Usage (Implicit)
• VUID-VkPipelineRasterizationConservativeStateCreateInfoEXT-sType-sType
sType must be VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_CONSERVATIVE_STATE_CREATE_INFO_EXT

flags must be 0

• VUID-VkPipelineRasterizationConservativeStateCreateInfoEXT-conservativeRasterizationMode-parameter
conservativeRasterizationMode must be a valid VkConservativeRasterizationModeEXT value

## 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.

Copyright 2014-2022 The Khronos Group Inc.