C Specification

To query the pipeline stack size of shaders in a shader group in the ray tracing pipeline, call:

// Provided by VK_KHR_ray_tracing_pipeline
VkDeviceSize vkGetRayTracingShaderGroupStackSizeKHR(
    VkDevice                                    device,
    VkPipeline                                  pipeline,
    uint32_t                                    group,
    VkShaderGroupShaderKHR                      groupShader);


  • device is the logical device containing the ray tracing pipeline.

  • pipeline is the ray tracing pipeline object containing the shaders groups.

  • group is the index of the shader group to query.

  • groupShader is the type of shader from the group to query.


The return value is the ray tracing pipeline stack size in bytes for the specified shader as called from the specified shader group.

Valid Usage
  • VUID-vkGetRayTracingShaderGroupStackSizeKHR-pipeline-04622
    pipeline must be a ray tracing pipeline

  • VUID-vkGetRayTracingShaderGroupStackSizeKHR-group-03608
    The value of group must be less than the number of shader groups in pipeline

  • VUID-vkGetRayTracingShaderGroupStackSizeKHR-groupShader-03609
    The shader identified by groupShader in group must not be VK_SHADER_UNUSED_KHR

Valid Usage (Implicit)
  • VUID-vkGetRayTracingShaderGroupStackSizeKHR-device-parameter
    device must be a valid VkDevice handle

  • VUID-vkGetRayTracingShaderGroupStackSizeKHR-pipeline-parameter
    pipeline must be a valid VkPipeline handle

  • VUID-vkGetRayTracingShaderGroupStackSizeKHR-groupShader-parameter
    groupShader must be a valid VkShaderGroupShaderKHR value

  • VUID-vkGetRayTracingShaderGroupStackSizeKHR-pipeline-parent
    pipeline must have been created, allocated, or retrieved from device

See Also

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 2014-2022 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0