C Specification

The VkFragmentShadingRateAttachmentInfoKHR structure is defined as:

// Provided by VK_KHR_fragment_shading_rate
typedef struct VkFragmentShadingRateAttachmentInfoKHR {
    VkStructureType                  sType;
    const void*                      pNext;
    const VkAttachmentReference2*    pFragmentShadingRateAttachment;
    VkExtent2D                       shadingRateAttachmentTexelSize;
} VkFragmentShadingRateAttachmentInfoKHR;

Members

  • sType is the type of this structure.

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

  • pFragmentShadingRateAttachment is an optional VkAttachmentReference2KHR structure defining the fragment shading rate attachment for this subpass.

  • shadingRateAttachmentTexelSize specifies the size of the portion of the framebuffer corresponding to each texel in pFragmentShadingRateAttachment.

Description

If no shading rate attachment is specified, or if this structure isn’t specified, the implementation behaves as if a valid shading rate attachment was specified with all texels specifying a single pixel per fragment.

Valid Usage

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04524
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, its layout member must be equal to VK_IMAGE_LAYOUT_GENERAL or VK_IMAGE_LAYOUT_FRAGMENT_SHADING_RATE_ATTACHMENT_OPTIMAL_KHR

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04525
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, shadingRateAttachmentTexelSize.width must be a power of two value

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04526
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, shadingRateAttachmentTexelSize.width must be less than or equal to maxFragmentShadingRateAttachmentTexelSize.width

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04527
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, shadingRateAttachmentTexelSize.width must be greater than or equal to minFragmentShadingRateAttachmentTexelSize.width

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04528
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, shadingRateAttachmentTexelSize.height must be a power of two value

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04529
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, shadingRateAttachmentTexelSize.height must be less than or equal to maxFragmentShadingRateAttachmentTexelSize.height

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04530
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, shadingRateAttachmentTexelSize.height must be greater than or equal to minFragmentShadingRateAttachmentTexelSize.height

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04531
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, the quotient of shadingRateAttachmentTexelSize.width and shadingRateAttachmentTexelSize.height must be less than or equal to maxFragmentShadingRateAttachmentTexelSizeAspectRatio

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-04532
    If pFragmentShadingRateAttachment is not NULL and its attachment member is not VK_ATTACHMENT_UNUSED, the quotient of shadingRateAttachmentTexelSize.height and shadingRateAttachmentTexelSize.width must be less than or equal to maxFragmentShadingRateAttachmentTexelSizeAspectRatio

Valid Usage (Implicit)

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-sType-sType
    sType must be VK_STRUCTURE_TYPE_FRAGMENT_SHADING_RATE_ATTACHMENT_INFO_KHR

  • VUID-VkFragmentShadingRateAttachmentInfoKHR-pFragmentShadingRateAttachment-parameter
    pFragmentShadingRateAttachment must be a valid pointer to a valid VkAttachmentReference2 structure

See Also

VkAttachmentReference2, VkExtent2D, 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 2014-2021 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0