# VkRenderPassFragmentDensityMapOffsetEndInfoEXT(3) Manual Page

## Name

VkRenderPassFragmentDensityMapOffsetEndInfoEXT - Structure specifying fragment density map offset subpass end information

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## C Specification

If the VkSubpassEndInfo::`pNext` chain or VkRenderingEndInfoEXT::`pNext` chain includes a `VkRenderPassFragmentDensityMapOffsetEndInfoEXT` structure, then that structure includes an array of fragment density map offsets per layer for the render pass.

The `VkRenderPassFragmentDensityMapOffsetEndInfoEXT` structure is defined as:

    // Provided by VK_EXT_fragment_density_map_offset
    typedef struct VkRenderPassFragmentDensityMapOffsetEndInfoEXT {
        VkStructureType      sType;
        const void*          pNext;
        uint32_t             fragmentDensityOffsetCount;
        const VkOffset2D*    pFragmentDensityOffsets;
    } VkRenderPassFragmentDensityMapOffsetEndInfoEXT;

or the equivalent:

    // Provided by VK_QCOM_fragment_density_map_offset
    typedef VkRenderPassFragmentDensityMapOffsetEndInfoEXT VkSubpassFragmentDensityMapOffsetEndInfoQCOM;

## Members

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

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

- `fragmentDensityOffsetCount` is the number of offsets being specified.

- `pFragmentDensityOffsets` is a pointer to an array of VkOffset2D structs, each of which describes the offset per layer.

## Description

The array elements are given per `layer` as defined by Fetch Density Value, where index = layer. Each (x,y) offset is in framebuffer pixels and shifts the fetch of the fragment density map by that amount. Offsets can be positive or negative.

If neither the VkSubpassEndInfo::`pNext` chain for the last subpass of a render pass nor the VkRenderingEndInfoEXT::`pNext` chain of a dynamic render pass include `VkRenderPassFragmentDensityMapOffsetEndInfoEXT`, or if `fragmentDensityOffsetCount` is zero, then the offset (0,0) is used for Fetch Density Value.

Valid Usage

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-fragmentDensityMapOffsets-06503
  If the `fragmentDensityMapOffset` feature is not enabled or fragment density map is not enabled in the render pass, `fragmentDensityOffsetCount` must equal `0`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-fragmentDensityMapAttachment-06504
  If VkRenderPassFragmentDensityMapCreateInfoEXT::`fragmentDensityMapAttachment` is not `VK_ATTACHMENT_UNUSED` and was not created with `VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSET_BIT_EXT`, `fragmentDensityOffsetCount` must equal `0`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-pDepthStencilAttachment-06505
  If the depth or stencil attachments for the render pass are used and were not created with `VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSET_BIT_EXT`, `fragmentDensityOffsetCount` must equal `0`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-pInputAttachments-06506
  If any used input attachments for the render pass were not created with `VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSET_BIT_EXT`, `fragmentDensityOffsetCount` must equal `0`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-pColorAttachments-06507
  If any used color attachments for the render pass were not created with `VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSET_BIT_EXT`, `fragmentDensityOffsetCount` must equal `0`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-pResolveAttachments-06508
  If any used resolve attachments for the render pass were not created with `VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSET_BIT_EXT`, `fragmentDensityOffsetCount` must equal `0`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-pPreserveAttachments-06509
  If any used preserve attachments for the render pass were not created with `VK_IMAGE_CREATE_FRAGMENT_DENSITY_MAP_OFFSET_BIT_EXT`, `fragmentDensityOffsetCount` must equal `0`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-fragmentDensityOffsetCount-06510
  If `fragmentDensityOffsetCount` is not `0` and multiview is enabled for the render pass, `fragmentDensityOffsetCount` must equal the `layerCount` that was specified in creating the fragment density map attachment view

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-fragmentDensityOffsetCount-06511
  If `fragmentDensityOffsetCount` is not `0` and multiview is not enabled for the render pass, `fragmentDensityOffsetCount` must equal `1`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-x-06512
  The `x` component of each element of `pFragmentDensityOffsets` must be an integer multiple of `fragmentDensityOffsetGranularity.width`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-y-06513
  The `y` component of each element of `pFragmentDensityOffsets` must be an integer multiple of `fragmentDensityOffsetGranularity.height`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-pFragmentDensityOffsets-10730
  Each element of `pFragmentDensityOffsets` must be identical for every vkCmdEndRendering2EXT call made in a render pass

Valid Usage (Implicit)

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_RENDER_PASS_FRAGMENT_DENSITY_MAP_OFFSET_END_INFO_EXT`

- VUID-VkRenderPassFragmentDensityMapOffsetEndInfoEXT-pFragmentDensityOffsets-parameter
  If `fragmentDensityOffsetCount` is not `0`, `pFragmentDensityOffsets` must be a valid pointer to an array of `fragmentDensityOffsetCount` VkOffset2D structures

## See Also

VK_EXT_fragment_density_map_offset, VkOffset2D, 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