# vkGetShaderModuleIdentifierEXT(3) Manual Page

## Name

vkGetShaderModuleIdentifierEXT - Query a unique identifier for a shader module

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## C Specification

Shader modules have unique identifiers associated with them. To query an implementation provided identifier, call:

    // Provided by VK_EXT_shader_module_identifier
    void vkGetShaderModuleIdentifierEXT(
        VkDevice                                    device,
        VkShaderModule                              shaderModule,
        VkShaderModuleIdentifierEXT*                pIdentifier);

## Parameters

- `device` is the logical device that created the shader module.

- `shaderModule` is the handle of the shader module.

- `pIdentifier` is a pointer to the returned VkShaderModuleIdentifierEXT.

## Description

The identifier returned by the implementation must only depend on `shaderIdentifierAlgorithmUUID` and information provided in the VkShaderModuleCreateInfo which created `shaderModule`. The implementation may return equal identifiers for two different VkShaderModuleCreateInfo structures if the difference does not affect pipeline compilation. Identifiers are only meaningful on different VkDevice objects if the device the identifier was queried from had the same `shaderModuleIdentifierAlgorithmUUID` as the device consuming the identifier.

Valid Usage

- VUID-vkGetShaderModuleIdentifierEXT-shaderModuleIdentifier-06884
  `shaderModuleIdentifier` feature must be enabled

Valid Usage (Implicit)

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

- VUID-vkGetShaderModuleIdentifierEXT-shaderModule-parameter
  `shaderModule` must be a valid VkShaderModule handle

- VUID-vkGetShaderModuleIdentifierEXT-pIdentifier-parameter
  `pIdentifier` must be a valid pointer to a VkShaderModuleIdentifierEXT structure

- VUID-vkGetShaderModuleIdentifierEXT-shaderModule-parent
  `shaderModule` must have been created, allocated, or retrieved from `device`

## See Also

VK_EXT_shader_module_identifier, VkDevice, VkShaderModule, VkShaderModuleIdentifierEXT

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0