# VkPhysicalDeviceProvokingVertexFeaturesEXT(3) Manual Page

## Name

VkPhysicalDeviceProvokingVertexFeaturesEXT - Structure describing the provoking vertex features that can be supported by an implementation

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## C Specification

The `VkPhysicalDeviceProvokingVertexFeaturesEXT` structure is defined as:

    // Provided by VK_EXT_provoking_vertex
    typedef struct VkPhysicalDeviceProvokingVertexFeaturesEXT {
        VkStructureType    sType;
        void*              pNext;
        VkBool32           provokingVertexLast;
        VkBool32           transformFeedbackPreservesProvokingVertex;
    } VkPhysicalDeviceProvokingVertexFeaturesEXT;

## Members

This structure describes the following features:

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `provokingVertexLast` indicates whether the implementation supports the `VK_PROVOKING_VERTEX_MODE_LAST_VERTEX_EXT` provoking vertex mode for flat shading.

- `transformFeedbackPreservesProvokingVertex` indicates that the order of vertices within each primitive written by transform feedback will preserve the provoking vertex. This does not apply to triangle fan primitives when `transformFeedbackPreservesTriangleFanProvokingVertex` is `VK_FALSE`. `transformFeedbackPreservesProvokingVertex` must be `VK_FALSE` when the `VK_EXT_transform_feedback` extension is not supported.

## Description

If the `VkPhysicalDeviceProvokingVertexFeaturesEXT` structure is included in the `pNext` chain of the VkPhysicalDeviceFeatures2 structure passed to vkGetPhysicalDeviceFeatures2, it is filled in to indicate whether each corresponding feature is supported. If the application wishes to use a VkDevice with any features described by `VkPhysicalDeviceProvokingVertexFeaturesEXT`, it must add an instance of the structure, with the desired feature members set to `VK_TRUE`, to the `pNext` chain of VkDeviceCreateInfo when creating the VkDevice.

When `VkPhysicalDeviceProvokingVertexFeaturesEXT` is in the `pNext` chain of VkDeviceCreateInfo but the `transformFeedback` feature is not enabled, the value of `transformFeedbackPreservesProvokingVertex` is ignored.

Valid Usage (Implicit)

- VUID-VkPhysicalDeviceProvokingVertexFeaturesEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROVOKING_VERTEX_FEATURES_EXT`

## See Also

VK_EXT_provoking_vertex, VkBool32, 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0