# VkRenderingInputAttachmentIndexInfo(3) Manual Page

## Name

VkRenderingInputAttachmentIndexInfo - Structure specifying input attachment indices

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## C Specification

The `VkRenderingInputAttachmentIndexInfo` structure is defined as:

    // Provided by VK_VERSION_1_4
    typedef struct VkRenderingInputAttachmentIndexInfo {
        VkStructureType    sType;
        const void*        pNext;
        uint32_t           colorAttachmentCount;
        const uint32_t*    pColorAttachmentInputIndices;
        const uint32_t*    pDepthInputAttachmentIndex;
        const uint32_t*    pStencilInputAttachmentIndex;
    } VkRenderingInputAttachmentIndexInfo;

    // Provided by VK_KHR_dynamic_rendering_local_read
    // Equivalent to VkRenderingInputAttachmentIndexInfo
    typedef VkRenderingInputAttachmentIndexInfo VkRenderingInputAttachmentIndexInfoKHR;

## Members

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

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

- `colorAttachmentCount` is the number of elements in `pColorAttachmentInputIndices`.

- `pColorAttachmentInputIndices` is a pointer to an array of `colorAttachmentCount` `uint32_t` values defining indices for color attachments to be used as input attachments.

- `pDepthInputAttachmentIndex` is either `NULL`, or a pointer to a `uint32_t` value defining the index for the depth attachment to be used as an input attachment.

- `pStencilInputAttachmentIndex` is either `NULL`, or a pointer to a `uint32_t` value defining the index for the stencil attachment to be used as an input attachment.

## Description

This structure allows applications to remap attachments to different input attachment indices.

Each element of `pColorAttachmentInputIndices` set to a value of VK_ATTACHMENT_UNUSED indicates that the corresponding attachment will not be used as an input attachment in this pipeline. Any other value in each of those elements will map the corresponding attachment to a `InputAttachmentIndex` value defined in shader code.

If `pColorAttachmentInputIndices` is `NULL`, it is equivalent to setting each element to its index within the array.

If `pDepthInputAttachmentIndex` or `pStencilInputAttachmentIndex` are set to `NULL`, they map to input attachments without a `InputAttachmentIndex` decoration. If they point to a value of VK_ATTACHMENT_UNUSED, it indicates that the corresponding attachment will not be used as an input attachment in this pipeline. If they point to any other value it maps the corresponding attachment to a `InputAttachmentIndex` value defined in shader code.

This structure can be included in the `pNext` chain of a VkGraphicsPipelineCreateInfo structure to set this state for a pipeline. If this structure is not included in the `pNext` chain of VkGraphicsPipelineCreateInfo, it is equivalent to specifying this structure with the following properties:

- `colorAttachmentCount` set to VkPipelineRenderingCreateInfo::`colorAttachmentCount`.

- `pColorAttachmentInputIndices` set to `NULL`.

- `pDepthInputAttachmentIndex` set to `NULL`.

- `pStencilInputAttachmentIndex` set to `NULL`.

This structure can be included in the `pNext` chain of a VkCommandBufferInheritanceInfo structure to specify inherited state from the primary command buffer. If this structure is not included in the `pNext` chain of VkCommandBufferInheritanceInfo, it is equivalent to specifying this structure with the following properties:

- `colorAttachmentCount` set to VkCommandBufferInheritanceRenderingInfo::`colorAttachmentCount`.

- `pColorAttachmentInputIndices` set to `NULL`.

- `pDepthInputAttachmentIndex` set to `NULL`.

- `pStencilInputAttachmentIndex` set to `NULL`.

Valid Usage

- VUID-VkRenderingInputAttachmentIndexInfo-dynamicRenderingLocalRead-09519
  If the `dynamicRenderingLocalRead` feature is not enabled, and `pColorAttachmentInputIndices` is not `NULL`, each element must be VK_ATTACHMENT_UNUSED

- VUID-VkRenderingInputAttachmentIndexInfo-dynamicRenderingLocalRead-09520
  If the `dynamicRenderingLocalRead` feature is not enabled, `pDepthInputAttachmentIndex` must be a valid pointer to a value of VK_ATTACHMENT_UNUSED

- VUID-VkRenderingInputAttachmentIndexInfo-dynamicRenderingLocalRead-09521
  If the `dynamicRenderingLocalRead` feature is not enabled, `pStencilInputAttachmentIndex` must be a valid pointer to a value of VK_ATTACHMENT_UNUSED

- VUID-VkRenderingInputAttachmentIndexInfo-pColorAttachmentInputIndices-09522
  Elements of `pColorAttachmentInputIndices` that are not VK_ATTACHMENT_UNUSED must each be unique

- VUID-VkRenderingInputAttachmentIndexInfo-pColorAttachmentInputIndices-09523
  Elements of `pColorAttachmentInputIndices` that are not VK_ATTACHMENT_UNUSED must not take the same value as the content of `pDepthInputAttachmentIndex`

- VUID-VkRenderingInputAttachmentIndexInfo-pColorAttachmentInputIndices-09524
  Elements of `pColorAttachmentInputIndices` that are not VK_ATTACHMENT_UNUSED must not take the same value as the content of `pStencilInputAttachmentIndex`

- VUID-VkRenderingInputAttachmentIndexInfo-colorAttachmentCount-09525
  `colorAttachmentCount` must be less than or equal to `maxColorAttachments`

- VUID-VkRenderingInputAttachmentIndexInfo-pDepthInputAttachmentIndex-12274
  Elements of `pDepthInputAttachmentIndex`, `pStencilInputAttachmentIndex`, and `pColorAttachmentInputIndices` that are not VK_ATTACHMENT_UNUSED must be less than `maxPerStageDescriptorInputAttachments`

Valid Usage (Implicit)

- VUID-VkRenderingInputAttachmentIndexInfo-sType-sType
  `sType` must be VK_STRUCTURE_TYPE_RENDERING_INPUT_ATTACHMENT_INDEX_INFO

- VUID-VkRenderingInputAttachmentIndexInfo-pColorAttachmentInputIndices-parameter
  If `colorAttachmentCount` is not `0`, and `pColorAttachmentInputIndices` is not `NULL`, `pColorAttachmentInputIndices` must be a valid pointer to an array of `colorAttachmentCount` `uint32_t` values

- VUID-VkRenderingInputAttachmentIndexInfo-pDepthInputAttachmentIndex-parameter
  If `pDepthInputAttachmentIndex` is not `NULL`, `pDepthInputAttachmentIndex` must be a valid pointer to a valid `uint32_t` value

- VUID-VkRenderingInputAttachmentIndexInfo-pStencilInputAttachmentIndex-parameter
  If `pStencilInputAttachmentIndex` is not `NULL`, `pStencilInputAttachmentIndex` must be a valid pointer to a valid `uint32_t` value

Structure Chaining

Extends the structures

  - VkCommandBufferInheritanceInfo

  - VkGraphicsPipelineCreateInfo

## See Also

VK_KHR_dynamic_rendering_local_read, VK_VERSION_1_4, VkStructureType, vkCmdSetRenderingInputAttachmentIndices, vkCmdSetRenderingInputAttachmentIndices

## 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 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0