VkIndirectCommandsLayoutUsageFlagBitsNV(3)

# VkIndirectCommandsLayoutUsageFlagBitsNV(3) Manual Page

## Name

VkIndirectCommandsLayoutUsageFlagBitsNV - Bitmask specifying allowed usage of an indirect commands layout

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## C Specification

Bits which can be set in VkIndirectCommandsLayoutCreateInfoNV::`flags`, specifying usage hints of an indirect command layout, are:

    // Provided by VK_NV_device_generated_commands
    typedef enum VkIndirectCommandsLayoutUsageFlagBitsNV {
        VK_INDIRECT_COMMANDS_LAYOUT_USAGE_EXPLICIT_PREPROCESS_BIT_NV = 0x00000001,
        VK_INDIRECT_COMMANDS_LAYOUT_USAGE_INDEXED_SEQUENCES_BIT_NV = 0x00000002,
        VK_INDIRECT_COMMANDS_LAYOUT_USAGE_UNORDERED_SEQUENCES_BIT_NV = 0x00000004,
    } VkIndirectCommandsLayoutUsageFlagBitsNV;

## Description

- `VK_INDIRECT_COMMANDS_LAYOUT_USAGE_EXPLICIT_PREPROCESS_BIT_NV` specifies that the layout is always used with the manual preprocessing step through calling vkCmdPreprocessGeneratedCommandsNV and executed by vkCmdExecuteGeneratedCommandsNV with `isPreprocessed` set to `VK_TRUE`.

- `VK_INDIRECT_COMMANDS_LAYOUT_USAGE_INDEXED_SEQUENCES_BIT_NV` specifies that the input data for the sequences is not implicitly indexed from 0..sequencesUsed but a user provided `VkBuffer` encoding the index is provided.

- `VK_INDIRECT_COMMANDS_LAYOUT_USAGE_UNORDERED_SEQUENCES_BIT_NV` specifies that the processing of sequences can happen at an implementation-dependent order, which is not: guaranteed to be coherent using the same input data. This flag is ignored when the `pipelineBindPoint` is `VK_PIPELINE_BIND_POINT_COMPUTE` as it is implied that the dispatch sequence is always unordered.

## See Also

VK_NV_device_generated_commands, VkIndirectCommandsLayoutUsageFlagsNV

## 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