vkCmdSetColorBlendEnableEXT(3)

# vkCmdSetColorBlendEnableEXT(3) Manual Page

## Name

vkCmdSetColorBlendEnableEXT - Specify the pname:blendEnable for each attachment dynamically for a command buffer

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## C Specification

To dynamically set `blendEnable`, call:

    // Provided by VK_EXT_extended_dynamic_state3, VK_EXT_shader_object
    void vkCmdSetColorBlendEnableEXT(
        VkCommandBuffer                             commandBuffer,
        uint32_t                                    firstAttachment,
        uint32_t                                    attachmentCount,
        const VkBool32*                             pColorBlendEnables);

## Parameters

- `commandBuffer` is the command buffer into which the command will be recorded.

- `firstAttachment` the first color attachment the color blending enable applies.

- `attachmentCount` the number of color blending enables in the `pColorBlendEnables` array.

- `pColorBlendEnables` an array of booleans to indicate whether color blending is enabled for the corresponding attachment.

## Description

This command sets the color blending enable of the specified color attachments for subsequent drawing commands when drawing using shader objects, or when the graphics pipeline is created with `VK_DYNAMIC_STATE_COLOR_BLEND_ENABLE_EXT` set in VkPipelineDynamicStateCreateInfo::`pDynamicStates`. Otherwise, this state is specified by the VkPipelineColorBlendAttachmentState::`blendEnable` values used to create the currently active pipeline.

Valid Usage

- VUID-vkCmdSetColorBlendEnableEXT-None-09423
  At least one of the following must be true:

  - The `extendedDynamicState3ColorBlendEnable` feature is enabled

  - The `shaderObject` feature is enabled

Valid Usage (Implicit)

- VUID-vkCmdSetColorBlendEnableEXT-commandBuffer-parameter
  `commandBuffer` must be a valid VkCommandBuffer handle

- VUID-vkCmdSetColorBlendEnableEXT-pColorBlendEnables-parameter
  `pColorBlendEnables` must be a valid pointer to an array of `attachmentCount` VkBool32 values

- VUID-vkCmdSetColorBlendEnableEXT-commandBuffer-recording
  `commandBuffer` must be in the recording state

- VUID-vkCmdSetColorBlendEnableEXT-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support graphics operations

- VUID-vkCmdSetColorBlendEnableEXT-videocoding
  This command must only be called outside of a video coding scope

- VUID-vkCmdSetColorBlendEnableEXT-attachmentCount-arraylength
  `attachmentCount` must be greater than `0`

Host Synchronization

- Host access to `commandBuffer` must be externally synchronized

- Host access to the `VkCommandPool` that `commandBuffer` was allocated from must be externally synchronized

Command Properties

Command Buffer Levels | Render Pass Scope | Video Coding Scope | Supported Queue Types | Command Type
--- | --- | --- | --- | ---
Primary Secondary | Both | Outside | Graphics | State

## See Also

VK_EXT_extended_dynamic_state3, VK_EXT_shader_object, VkBool32, VkCommandBuffer

## 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