# vkConvertCooperativeVectorMatrixNV(3) Manual Page

## Name

vkConvertCooperativeVectorMatrixNV - Convert a cooperative vector matrix from one layout and type to another

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## C Specification

To query the size of a cooperative vector matrix, or to convert a matrix to another layout and type, call:

    // Provided by VK_NV_cooperative_vector
    VkResult vkConvertCooperativeVectorMatrixNV(
        VkDevice                                    device,
        const VkConvertCooperativeVectorMatrixInfoNV* pInfo);

## Parameters

- `device` is the device.

- `pInfo` is a pointer to a VkConvertCooperativeVectorMatrixInfoNV structure containing information about the layout conversion.

## Description

If `pInfo->dstData` is `NULL`, then the number of bytes required to store the converted matrix is returned in `pDstSize`. Otherwise, `pInfo->pDstSize` must point to a variable set by the user to the number of bytes in `pInfo->dstData`, and on return the variable is overwritten with the number of bytes actually written to `pInfo->dstData`. `pInfo->srcData` can be `NULL` when `pInfo->dstData` is `NULL`. If `pInfo->pDstSize` is less than the number of bytes required to store the converted matrix, no bytes will be written, and `VK_INCOMPLETE` will be returned instead of `VK_SUCCESS`, to indicate that not enough space was provided.

Valid Usage

- VUID-vkConvertCooperativeVectorMatrixNV-pInfo-10073
  If `pInfo->srcData.hostAddress` is `NULL`, then `pInfo->dstData.hostAddress` must be `NULL`

- VUID-vkConvertCooperativeVectorMatrixNV-pInfo-10074
  If `pInfo->srcData.hostAddress` is not `NULL`, then `pInfo->srcSize` must be large enough to contain the source matrix, based either on the standard matrix layout or based on the size filled out by this command

- VUID-vkConvertCooperativeVectorMatrixNV-pInfo-10075
  If `pInfo->dstData.hostAddress` is not `NULL`, then the value pointed to by `pInfo->pDstSize` must be large enough to contain the destination matrix, based either on the standard matrix layout or based on the size filled out by this command

- VUID-vkConvertCooperativeVectorMatrixNV-pInfo-10076
  If `pInfo->dstData.hostAddress` is not `NULL`, the source and destination memory ranges must not overlap

Valid Usage (Implicit)

- VUID-vkConvertCooperativeVectorMatrixNV-device-parameter
  `device` must be a valid VkDevice handle

- VUID-vkConvertCooperativeVectorMatrixNV-pInfo-parameter
  `pInfo` must be a valid pointer to a valid VkConvertCooperativeVectorMatrixInfoNV structure

Return Codes

On success, this command returns

  - `VK_SUCCESS`

  - `VK_INCOMPLETE`

On failure, this command returns

  - `VK_ERROR_OUT_OF_HOST_MEMORY`

## See Also

VK_NV_cooperative_vector, VkConvertCooperativeVectorMatrixInfoNV, VkDevice

## 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