VkRayTracingPipelineCreateInfoKHR

The VkRayTracingPipelineCreateInfoKHR structure is defined as:

typedef struct VkRayTracingPipelineCreateInfoKHR {
    VkStructureType sType;
    const void* pNext;
    VkPipelineCreateFlags flags;
    uint32_t stageCount;
    const VkPipelineShaderStageCreateInfo* pStages;
    uint32_t groupCount;
    const VkRayTracingShaderGroupCreateInfoKHR* pGroups;
    uint32_t maxPipelineRayRecursionDepth;
    const VkPipelineLibraryCreateInfoKHR* pLibraryInfo;
    const VkRayTracingPipelineInterfaceCreateInfoKHR* pLibraryInterface;
    const VkPipelineDynamicStateCreateInfo* pDynamicState;
    VkPipelineLayout layout;
    VkPipeline basePipelineHandle;
    int32_t basePipelineIndex;
} VkRayTracingPipelineCreateInfoKHR;

• 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 VkPipelineCreateFlagBits specifying how the pipeline will be generated.
• stageCount is the number of entries in the pStages array.
• pStages is a pointer to an array of stageCount
  VkPipelineShaderStageCreateInfo structures describing the set of the shader stages to be included in the ray tracing pipeline.
• groupCount is the number of entries in the pGroups array.
• pGroups is a pointer to an array of groupCount
  VkRayTracingShaderGroupCreateInfoKHR structures describing the set of the shader stages to be included in each shader group in the ray tracing pipeline.
• maxPipelineRayRecursionDepth is the maximum recursion depth of shaders executed by this pipeline.
• pLibraryInfo is a pointer to a VkPipelineLibraryCreateInfoKHR structure defining pipeline libraries to include.
• pLibraryInterface is a pointer to a VkRayTracingPipelineInterfaceCreateInfoKHR structure defining additional information when using pipeline libraries.
• pDynamicState is a pointer to a VkPipelineDynamicStateCreateInfo structure, and is used to indicate which properties of the pipeline state object are dynamic and can be changed independently of the pipeline state. This can be NULL, which means no state in the pipeline is considered dynamic.
• layout is the description of binding locations used by both the pipeline and descriptor sets used with the pipeline.
• basePipelineHandle is a pipeline to derive from.
• basePipelineIndex is an index into the pCreateInfos parameter to use as a pipeline to derive from.

The parameters basePipelineHandle and basePipelineIndex are described in more detail in Pipeline Derivatives.

When VK_PIPELINE_CREATE_LIBRARY_BIT_KHR is specified, this pipeline defines a pipeline library which cannot be bound as a ray tracing pipeline directly. Instead, pipeline libraries define common shaders and shader groups which can be included in future pipeline creation.

If pipeline libraries are included in pLibraryInfo, shaders defined in those libraries are treated as if they were defined as additional entries in pStages, appended in the order they appear in the pLibraries array and in the pStages array when those libraries were defined.

When referencing shader groups in order to obtain a shader group handle, groups defined in those libraries are treated as if they were defined as additional entries in pGroups, appended in the order they appear in the pLibraries array and in the pGroups array when those libraries were defined. The shaders these groups reference are set when the pipeline library is created, referencing those specified in the pipeline library, not in the pipeline that includes it.

The default stack size for a pipeline if VK_DYNAMIC_STATE_RAY_TRACING_PIPELINE_STACK_SIZE_KHR is not provided is computed as described in Ray Tracing Pipeline Stack.

If the pNext chain includes a VkPipelineCreateFlags2CreateInfoKHR structure, VkPipelineCreateFlags2CreateInfoKHR::flags from that structure is used instead of flags from this structure.