VkSubpassDescription2(3)

# VkSubpassDescription2(3) Manual Page

## Name

VkSubpassDescription2 - Structure specifying a subpass description

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## C Specification

The `VkSubpassDescription2` structure is defined as:

Warning | This functionality is superseded by Vulkan Version 1.4. See Legacy Functionality for more information.

    // Provided by VK_VERSION_1_2
    typedef struct VkSubpassDescription2 {
        VkStructureType                  sType;
        const void*                      pNext;
        VkSubpassDescriptionFlags        flags;
        VkPipelineBindPoint              pipelineBindPoint;
        uint32_t                         viewMask;
        uint32_t                         inputAttachmentCount;
        const VkAttachmentReference2*    pInputAttachments;
        uint32_t                         colorAttachmentCount;
        const VkAttachmentReference2*    pColorAttachments;
        const VkAttachmentReference2*    pResolveAttachments;
        const VkAttachmentReference2*    pDepthStencilAttachment;
        uint32_t                         preserveAttachmentCount;
        const uint32_t*                  pPreserveAttachments;
    } VkSubpassDescription2;

    // Provided by VK_KHR_create_renderpass2
    // Equivalent to VkSubpassDescription2
    typedef VkSubpassDescription2 VkSubpassDescription2KHR;

## Members

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

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

- `flags` is a bitmask of VkSubpassDescriptionFlagBits specifying usage of the subpass.

- `pipelineBindPoint` is a VkPipelineBindPoint value specifying the pipeline type supported for this subpass.

- `viewMask` is a bitfield of view indices describing which views rendering is broadcast to in this subpass, when multiview is enabled.

- `inputAttachmentCount` is the number of input attachments.

- `pInputAttachments` is a pointer to an array of VkAttachmentReference2 structures defining the input attachments for this subpass and their layouts.

- `colorAttachmentCount` is the number of color attachments.

- `pColorAttachments` is a pointer to an array of `colorAttachmentCount` VkAttachmentReference2 structures defining the color attachments for this subpass and their layouts.

- `pResolveAttachments` is `NULL` or a pointer to an array of `colorAttachmentCount` VkAttachmentReference2 structures defining the resolve attachments for this subpass and their layouts.

- `pDepthStencilAttachment` is a pointer to a VkAttachmentReference2 structure specifying the depth/stencil attachment for this subpass and its layout.

- `preserveAttachmentCount` is the number of preserved attachments.

- `pPreserveAttachments` is a pointer to an array of `preserveAttachmentCount` render pass attachment indices identifying attachments that are not used by this subpass, but whose contents must be preserved throughout the subpass.

## Description

Parameters defined by this structure with the same name as those in VkSubpassDescription have the identical effect to those parameters.

`viewMask` has the same effect for the described subpass as VkRenderPassMultiviewCreateInfo::`pViewMasks` has on each corresponding subpass.

If a VkFragmentShadingRateAttachmentInfoKHR structure is included in the `pNext` chain, `pFragmentShadingRateAttachment` is not `NULL`, and its `attachment` member is not VK_ATTACHMENT_UNUSED, the identified attachment defines a fragment shading rate attachment for that subpass.

If any element of `pResolveAttachments` is an image specified with an VkExternalFormatANDROID, values in the corresponding color attachment will be resolved to the resolve attachment in the same manner as specified for VK_RESOLVE_MODE_EXTERNAL_FORMAT_DOWNSAMPLE_BIT_ANDROID.

If the `nullColorAttachmentWithExternalFormatResolve` limit is VK_TRUE, values in the color attachment will be loaded from the resolve attachment at the start of rendering, and may also be reloaded any time after a resolve occurs or the resolve attachment is written to; if this occurs it must happen-before any writes to the color attachment are performed which happen-after the resolve that triggers this. If any color component in the external format is subsampled, values will be read from the nearest sample in the image when they are loaded. If the color attachment is also used as an input attachment, the same behavior applies.

Setting the color attachment to VK_ATTACHMENT_UNUSED when an external resolve attachment is used and the `nullColorAttachmentWithExternalFormatResolve` limit is VK_TRUE will not result in color attachment writes to be discarded for that attachment.

When `nullColorAttachmentWithExternalFormatResolve` is VK_TRUE, the color output from the subpass can still be read via an input attachment; but the application cannot bind an image view for the color attachment as there is no such image view bound. Instead to access the data as an input attachment applications can use the resolve attachment in its place - using the resolve attachment image for the descriptor, and setting the corresponding element of `pInputAttachments` to the index of the resolve attachment.

Loads or input attachment reads from the resolve attachment are performed as if using a VkSamplerYcbcrConversionCreateInfo with the following parameters:

    VkSamplerYcbcrConversionCreateInfo createInfo = {
        .sType = VK_STRUCTURE_TYPE_SAMPLER_YCBCR_CONVERSION_CREATE_INFO,
        .pNext = NULL,
        .format = VK_FORMAT_UNDEFINED,
        .ycbcrModel = VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY,
        .ycbcrRange = VK_SAMPLER_YCBCR_RANGE_ITU_FULL,
        .components = {
            .r = VK_COMPONENT_SWIZZLE_B
            .g = VK_COMPONENT_SWIZZLE_R
            .b = VK_COMPONENT_SWIZZLE_G
            .a = VK_COMPONENT_SWIZZLE_IDENTITY},
        .xChromaOffset = properties.chromaOffsetX,
        .yChromaOffset = properties.chromaOffsetY,
        .chromaFilter = VK_FILTER_NEAREST,
        .forceExplicitReconstruction = ... };

where `properties` is equal to VkPhysicalDeviceExternalFormatResolvePropertiesANDROID returned by the device and `forceExplicitReconstruction` is effectively ignored as the VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY model is used. The applied swizzle is the same effective swizzle that would be applied by the VK_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_IDENTITY model, but no range expansion is applied.

Valid Usage

- VUID-VkSubpassDescription2-attachment-06912
  If the `attachment` member of an element of `pInputAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL or VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06913
  If the `attachment` member of an element of `pColorAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL or VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06914
  If the `attachment` member of an element of `pResolveAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL or VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06915
  If the `attachment` member of `pDepthStencilAttachment` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL or VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06916
  If the `attachment` member of an element of `pColorAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL or VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06917
  If the `attachment` member of an element of `pResolveAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_READ_ONLY_OPTIMAL or VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06918
  If the `attachment` member of an element of `pInputAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL or VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06919
  If the `attachment` member of an element of `pColorAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL, VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL, VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06920
  If the `attachment` member of an element of `pResolveAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL, VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL, VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL, or VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL

- VUID-VkSubpassDescription2-attachment-06921
  If the `attachment` member of an element of `pInputAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_ATTACHMENT_OPTIMAL_KHR

- VUID-VkSubpassDescription2-attachment-06922
  If the `attachment` member of an element of `pColorAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_READ_ONLY_OPTIMAL_KHR

- VUID-VkSubpassDescription2-attachment-06923
  If the `attachment` member of an element of `pResolveAttachments` is not VK_ATTACHMENT_UNUSED, its `layout` member must not be VK_IMAGE_LAYOUT_READ_ONLY_OPTIMAL_KHR

- VUID-VkSubpassDescription2-flags-10683
  If `flags` includes VK_SUBPASS_DESCRIPTION_TILE_SHADING_APRON_BIT_QCOM, the render pass must have been created with a VkRenderPassTileShadingCreateInfoQCOM::`tileApronSize` greater than `(0,0)`

- VUID-VkSubpassDescription2-inputAttachmentCount-12293
  `inputAttachmentCount` must be less than or equal to `maxPerStageDescriptorInputAttachments`

- VUID-VkSubpassDescription2-colorAttachmentCount-00845
  `colorAttachmentCount` must be less than or equal to `maxColorAttachments`

- VUID-VkSubpassDescription2-loadOp-00846
  If the first use of an attachment in this render pass is as an input attachment, and the attachment is not also used as a color or depth/stencil attachment in the same subpass, then `loadOp` must not be VK_ATTACHMENT_LOAD_OP_CLEAR

- VUID-VkSubpassDescription2-attachment-06251
  If the `attachment` member of `pDepthStencilAttachment` is not VK_ATTACHMENT_UNUSED and its `pNext` chain includes a VkAttachmentReferenceStencilLayout structure, the `layout` member of `pDepthStencilAttachment` must not be VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL or VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL

- VUID-VkSubpassDescription2-pipelineBindPoint-04953
  `pipelineBindPoint` must be VK_PIPELINE_BIND_POINT_GRAPHICS or VK_PIPELINE_BIND_POINT_SUBPASS_SHADING_HUAWEI

- VUID-VkSubpassDescription2-pResolveAttachments-03067
  If `pResolveAttachments` is not `NULL`, each resolve attachment that is not VK_ATTACHMENT_UNUSED must have a sample count of VK_SAMPLE_COUNT_1_BIT

- VUID-VkSubpassDescription2-externalFormatResolve-09335
  If the `externalFormatResolve` feature is not enabled and `pResolveAttachments` is not `NULL`, for each resolve attachment that does not have the value VK_ATTACHMENT_UNUSED, the corresponding color attachment must not have the value VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-nullColorAttachmentWithExternalFormatResolve-09336
  If the `nullColorAttachmentWithExternalFormatResolve` property is VK_FALSE and `pResolveAttachments` is not `NULL`, for each resolve attachment that has a format of VK_FORMAT_UNDEFINED, the corresponding color attachment must not have the value VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-nullColorAttachmentWithExternalFormatResolve-09337
  If the `nullColorAttachmentWithExternalFormatResolve` property is VK_TRUE and `pResolveAttachments` is not `NULL`, for each resolve attachment that has a format of VK_FORMAT_UNDEFINED, the corresponding color attachment must have the value VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-externalFormatResolve-09338
  If the `externalFormatResolve` feature is not enabled and `pResolveAttachments` is not `NULL`, for each resolve attachment that is not VK_ATTACHMENT_UNUSED, the corresponding color attachment must not have a sample count of VK_SAMPLE_COUNT_1_BIT

- VUID-VkSubpassDescription2-externalFormatResolve-09339
  If the `externalFormatResolve` feature is not enabled, each element of `pResolveAttachments` must have the same VkFormat as its corresponding color attachment

- VUID-VkSubpassDescription2-multisampledRenderToSingleSampled-06869
  If the `multisampledRenderToSingleSampled` feature is not enabled, all attachments in `pColorAttachments` that are not VK_ATTACHMENT_UNUSED must have the same sample count

- VUID-VkSubpassDescription2-pInputAttachments-02897
  All attachments in `pInputAttachments` that are not VK_ATTACHMENT_UNUSED and any of the following is true:

  - the `externalFormatResolve` feature is not enabled

  - the `nullColorAttachmentWithExternalFormatResolve` property is VK_FALSE

  - does not have a non-zero value of VkExternalFormatANDROID::`externalFormat`

  must have image formats whose potential format features contain at least VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT or VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT

- VUID-VkSubpassDescription2-pColorAttachments-02898
  All attachments in `pColorAttachments` that are not VK_ATTACHMENT_UNUSED must have image formats whose potential format features contain VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT

- VUID-VkSubpassDescription2-pResolveAttachments-09343
  All attachments in `pResolveAttachments` that are not VK_ATTACHMENT_UNUSED and do not have an image format of VK_FORMAT_UNDEFINED must have image formats whose potential format features contain VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT

- VUID-VkSubpassDescription2-pDepthStencilAttachment-02900
  If `pDepthStencilAttachment` is not `NULL` and the attachment is not VK_ATTACHMENT_UNUSED then it must have an image format whose potential format features contain VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT

- VUID-VkSubpassDescription2-linearColorAttachment-06499
  If the `linearColorAttachment` feature is enabled and the image is created with VK_IMAGE_TILING_LINEAR, all attachments in `pInputAttachments` that are not VK_ATTACHMENT_UNUSED must have image formats whose potential format features must contain VK_FORMAT_FEATURE_2_LINEAR_COLOR_ATTACHMENT_BIT_NV

- VUID-VkSubpassDescription2-linearColorAttachment-06500
  If the `linearColorAttachment` feature is enabled and the image is created with VK_IMAGE_TILING_LINEAR, all attachments in `pColorAttachments` that are not VK_ATTACHMENT_UNUSED must have image formats whose potential format features must contain VK_FORMAT_FEATURE_2_LINEAR_COLOR_ATTACHMENT_BIT_NV

- VUID-VkSubpassDescription2-linearColorAttachment-06501
  If the `linearColorAttachment` feature is enabled and the image is created with VK_IMAGE_TILING_LINEAR, all attachments in `pResolveAttachments` that are not VK_ATTACHMENT_UNUSED must have image formats whose potential format features must contain VK_FORMAT_FEATURE_2_LINEAR_COLOR_ATTACHMENT_BIT_NV

- VUID-VkSubpassDescription2-None-09456
  If either of the following is enabled:

  - The `VK_AMD_mixed_attachment_samples` extension

  - The `VK_NV_framebuffer_mixed_samples` extension

  all attachments in `pColorAttachments` that are not VK_ATTACHMENT_UNUSED must have a sample count that is smaller than or equal to the sample count of `pDepthStencilAttachment` if it is not VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-pNext-06870
  If the `pNext` chain includes a VkMultisampledRenderToSingleSampledInfoEXT structure with `multisampledRenderToSingleSampledEnable` equal to VK_TRUE, then all attachments in `pColorAttachments` and `pDepthStencilAttachment` that are not VK_ATTACHMENT_UNUSED must have a sample count that is either VK_SAMPLE_COUNT_1_BIT or equal to VkMultisampledRenderToSingleSampledInfoEXT::`rasterizationSamples`

- VUID-VkSubpassDescription2-pNext-06871
  If the `pNext` chain includes a VkMultisampledRenderToSingleSampledInfoEXT structure with `multisampledRenderToSingleSampledEnable` equal to VK_TRUE, and `pDepthStencilAttachment` is not `NULL`, does not have the value VK_ATTACHMENT_UNUSED, and has a sample count of VK_SAMPLE_COUNT_1_BIT, the `pNext` chain must also include a VkSubpassDescriptionDepthStencilResolve structure with `pDepthStencilResolveAttachment` that is either `NULL` or has the value VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-multisampledRenderToSingleSampled-06872
  If none of the following are enabled:

  - The `VK_AMD_mixed_attachment_samples` extension

  - The `VK_NV_framebuffer_mixed_samples` extension

  - The `multisampledRenderToSingleSampled` feature

  all attachments in `pDepthStencilAttachment` and `pColorAttachments` that are not VK_ATTACHMENT_UNUSED must have the same sample count

- VUID-VkSubpassDescription2-attachment-03073
  Each element of `pPreserveAttachments` must not be VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-pPreserveAttachments-03074
  Each element of `pPreserveAttachments` must not also be an element of any other member of the subpass description

- VUID-VkSubpassDescription2-layout-02528
  If any attachment is used by more than one VkAttachmentReference2 member, then each use must use the same `layout`

- VUID-VkSubpassDescription2-flags-03076
  If `flags` includes VK_SUBPASS_DESCRIPTION_PER_VIEW_POSITION_X_ONLY_BIT_NVX, it must also include VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX

- VUID-VkSubpassDescription2-attachment-02799
  If the `attachment` member of any element of `pInputAttachments` is not VK_ATTACHMENT_UNUSED, then the `aspectMask` member must be a valid combination of VkImageAspectFlagBits

- VUID-VkSubpassDescription2-attachment-02800
  If the `attachment` member of any element of `pInputAttachments` is not VK_ATTACHMENT_UNUSED, then the `aspectMask` member must not be `0`

- VUID-VkSubpassDescription2-attachment-02801
  If the `attachment` member of any element of `pInputAttachments` is not VK_ATTACHMENT_UNUSED, then the `aspectMask` member must not include VK_IMAGE_ASPECT_METADATA_BIT

- VUID-VkSubpassDescription2-attachment-04563
  If the `attachment` member of any element of `pInputAttachments` is not VK_ATTACHMENT_UNUSED, then the `aspectMask` member must not include `VK_IMAGE_ASPECT_MEMORY_PLANE_i_BIT_EXT` for any index i

- VUID-VkSubpassDescription2-pDepthStencilAttachment-04440
  An attachment must not be used in both `pDepthStencilAttachment` and `pColorAttachments`

- VUID-VkSubpassDescription2-multiview-06558
  If the `multiview` feature is not enabled, `viewMask` must be `0`

- VUID-VkSubpassDescription2-viewMask-06706
  The index of the most significant bit in `viewMask` must be less than `maxMultiviewViewCount`

- VUID-VkSubpassDescription2-externalFormatResolve-09344
  If the `externalFormatResolve` feature is enabled, `pResolveAttachments` is not `NULL`, and `colorAttachmentCount` is not `1`, any element of `pResolveAttachments` that is not VK_ATTACHMENT_UNUSED, must not have a format of VK_FORMAT_UNDEFINED

- VUID-VkSubpassDescription2-externalFormatResolve-09345
  If the `externalFormatResolve` feature is enabled, `pResolveAttachments` is not `NULL`, any element of `pResolveAttachments` is not VK_ATTACHMENT_UNUSED and has a format of VK_FORMAT_UNDEFINED, and the corresponding element of `pColorAttachments` is not VK_ATTACHMENT_UNUSED, the color attachment must have a `samples` value of `1`

- VUID-VkSubpassDescription2-externalFormatResolve-09346
  If the `externalFormatResolve` feature is enabled, `pResolveAttachments` is not `NULL`, and any element of `pResolveAttachments` is not VK_ATTACHMENT_UNUSED and has a format of VK_FORMAT_UNDEFINED, `viewMask` must be `0`

- VUID-VkSubpassDescription2-externalFormatResolve-09347
  If the `externalFormatResolve` feature is enabled, `pResolveAttachments` is not `NULL`, and any element of `pResolveAttachments` is not VK_ATTACHMENT_UNUSED and has a format of VK_FORMAT_UNDEFINED, VkFragmentShadingRateAttachmentInfoKHR::`pFragmentShadingRateAttachment` must either be `NULL` or a VkAttachmentReference2 structure with an `attachment` value of VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-externalFormatResolve-09348
  If the `externalFormatResolve` feature is enabled, `pResolveAttachments` is not `NULL`, and any element of `pResolveAttachments` is not VK_ATTACHMENT_UNUSED and has a format of VK_FORMAT_UNDEFINED, elements of `pInputAttachments` referencing either a color attachment or resolve attachment used in this subpass must not include `VK_IMAGE_ASPECT_PLANE_i_BIT` for any index i in its `aspectMask`

- VUID-VkSubpassDescription2-flags-04907
  If `flags` includes VK_SUBPASS_DESCRIPTION_CUSTOM_RESOLVE_BIT_EXT, and if `pResolveAttachments` is not `NULL`, then each resolve attachment must be VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-flags-04908
  If `flags` includes VK_SUBPASS_DESCRIPTION_CUSTOM_RESOLVE_BIT_EXT, and if `pDepthStencilResolveAttachment` is not `NULL`, then the depth/stencil resolve attachment must be VK_ATTACHMENT_UNUSED

- VUID-VkSubpassDescription2-flags-04909
  If `flags` includes VK_SUBPASS_DESCRIPTION_CUSTOM_RESOLVE_BIT_EXT, then the subpass must be the last subpass in a subpass dependency chain

Valid Usage (Implicit)

- VUID-VkSubpassDescription2-sType-sType
  `sType` must be VK_STRUCTURE_TYPE_SUBPASS_DESCRIPTION_2

- VUID-VkSubpassDescription2-pNext-pNext
  Each `pNext` member of any structure (including this one) in the `pNext` chain must be either `NULL` or a pointer to a valid instance of VkFragmentShadingRateAttachmentInfoKHR, VkMultisampledRenderToSingleSampledInfoEXT, VkRenderPassCreationControlEXT, VkRenderPassSubpassFeedbackCreateInfoEXT, or VkSubpassDescriptionDepthStencilResolve

- VUID-VkSubpassDescription2-sType-unique
  The `sType` value of each structure in the `pNext` chain must be unique

- VUID-VkSubpassDescription2-flags-parameter
  `flags` must be a valid combination of VkSubpassDescriptionFlagBits values

- VUID-VkSubpassDescription2-pipelineBindPoint-parameter
  `pipelineBindPoint` must be a valid VkPipelineBindPoint value

- VUID-VkSubpassDescription2-pInputAttachments-parameter
  If `inputAttachmentCount` is not `0`, `pInputAttachments` must be a valid pointer to an array of `inputAttachmentCount` valid VkAttachmentReference2 structures

- VUID-VkSubpassDescription2-pColorAttachments-parameter
  If `colorAttachmentCount` is not `0`, `pColorAttachments` must be a valid pointer to an array of `colorAttachmentCount` valid VkAttachmentReference2 structures

- VUID-VkSubpassDescription2-pResolveAttachments-parameter
  If `colorAttachmentCount` is not `0`, and `pResolveAttachments` is not `NULL`, `pResolveAttachments` must be a valid pointer to an array of `colorAttachmentCount` valid VkAttachmentReference2 structures

- VUID-VkSubpassDescription2-pDepthStencilAttachment-parameter
  If `pDepthStencilAttachment` is not `NULL`, `pDepthStencilAttachment` must be a valid pointer to a valid VkAttachmentReference2 structure

- VUID-VkSubpassDescription2-pPreserveAttachments-parameter
  If `preserveAttachmentCount` is not `0`, `pPreserveAttachments` must be a valid pointer to an array of `preserveAttachmentCount` `uint32_t` values

## See Also

VK_KHR_create_renderpass2, VK_VERSION_1_2, VkAttachmentReference2, VkPipelineBindPoint, VkRenderPassCreateInfo2, VkStructureType, VkSubpassDescriptionFlags

## 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