# VkDependencyFlagBits(3) Manual Page

## Name

VkDependencyFlagBits - Bitmask specifying how execution and memory dependencies are formed

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## C Specification

Bits which can be set in `vkCmdPipelineBarrier`::`dependencyFlags`, specifying how execution and memory dependencies are formed, are:

    // Provided by VK_VERSION_1_0
    typedef enum VkDependencyFlagBits {
        VK_DEPENDENCY_BY_REGION_BIT = 0x00000001,
      // Provided by VK_VERSION_1_1
        VK_DEPENDENCY_DEVICE_GROUP_BIT = 0x00000004,
      // Provided by VK_VERSION_1_1
        VK_DEPENDENCY_VIEW_LOCAL_BIT = 0x00000002,
      // Provided by VK_EXT_attachment_feedback_loop_layout
        VK_DEPENDENCY_FEEDBACK_LOOP_BIT_EXT = 0x00000008,
      // Provided by VK_KHR_multiview
        VK_DEPENDENCY_VIEW_LOCAL_BIT_KHR = VK_DEPENDENCY_VIEW_LOCAL_BIT,
      // Provided by VK_KHR_device_group
        VK_DEPENDENCY_DEVICE_GROUP_BIT_KHR = VK_DEPENDENCY_DEVICE_GROUP_BIT,
    } VkDependencyFlagBits;

## Description

- `VK_DEPENDENCY_BY_REGION_BIT` specifies that dependencies will be framebuffer-local.

- `VK_DEPENDENCY_VIEW_LOCAL_BIT` specifies that dependencies will be view-local.

- `VK_DEPENDENCY_DEVICE_GROUP_BIT` specifies that dependencies are non-device-local.

- `VK_DEPENDENCY_FEEDBACK_LOOP_BIT_EXT` specifies that the render pass will write to and read from the same image using the `VK_IMAGE_LAYOUT_ATTACHMENT_FEEDBACK_LOOP_OPTIMAL_EXT` layout.

## See Also

VK_VERSION_1_0, VkDependencyFlags

## 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