# VkPipelineRasterizationConservativeStateCreateInfoEXT(3) Manual Page

## Name

VkPipelineRasterizationConservativeStateCreateInfoEXT - Structure specifying conservative raster state

## C Specification

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`. The `VkPipelineRasterizationConservativeStateCreateInfoEXT` state is set by adding this structure to the `pNext` chain of a `VkPipelineRasterizationStateCreateInfo` structure when creating the graphics pipeline. Enabling these modes also affects line and point rasterization if the implementation sets `VkPhysicalDeviceConservativeRasterizationPropertiesEXT`::`conservativePointAndLineRasterization` to `VK_TRUE`.

`VkPipelineRasterizationConservativeStateCreateInfoEXT` is defined as:

    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 an extension-specific 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`.

## Description

Valid Usage

- `extraPrimitiveOverestimationSize` must be in the range of `0.0` to `VkPhysicalDeviceConservativeRasterizationPropertiesEXT`::`maxExtraPrimitiveOverestimationSize` inclusive

Valid Usage (Implicit)

- `sType` must be `VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_CONSERVATIVE_STATE_CREATE_INFO_EXT`

- `flags` must be `0`

- `conservativeRasterizationMode` must be a valid VkConservativeRasterizationModeEXT value

## See Also

VkConservativeRasterizationModeEXT, VkPipelineRasterizationConservativeStateCreateFlagsEXT, VkStructureType

## 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

Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.