vkCmdSetColorBlendEquationEXT(3)

# vkCmdSetColorBlendEquationEXT(3) Manual Page

## Name

vkCmdSetColorBlendEquationEXT - Specify the blend factors and operations dynamically for a command buffer

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## C Specification

To dynamically set color blend factors and operations, call:

    // Provided by VK_EXT_extended_dynamic_state3
    void vkCmdSetColorBlendEquationEXT(
        VkCommandBuffer                             commandBuffer,
        uint32_t                                    firstAttachment,
        uint32_t                                    attachmentCount,
        const VkColorBlendEquationEXT*              pColorBlendEquations);

## Parameters

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

- `firstAttachment` the first color attachment the color blend factors and operations apply to.

- `attachmentCount` the number of VkColorBlendEquationEXT elements in the `pColorBlendEquations` array.

- `pColorBlendEquations` an array of VkColorBlendEquationEXT structs that specify the color blend factors and operations for the corresponding attachments.

## Description

This command sets the color blending factors and operations of the specified attachments for subsequent drawing commands when the graphics pipeline is created with `VK_DYNAMIC_STATE_COLOR_BLEND_EQUATION_EXT` set in VkPipelineDynamicStateCreateInfo::`pDynamicStates`. Otherwise, this state is specified by the VkPipelineColorBlendAttachmentState::`srcColorBlendFactor`, VkPipelineColorBlendAttachmentState::`dstColorBlendFactor`, VkPipelineColorBlendAttachmentState::`colorBlendOp`, VkPipelineColorBlendAttachmentState::`srcAlphaBlendFactor`, VkPipelineColorBlendAttachmentState::`dstAlphaBlendFactor`, and VkPipelineColorBlendAttachmentState::`alphaBlendOp` values used to create the currently active pipeline.

Valid Usage

- VUID-vkCmdSetColorBlendEquationEXT-extendedDynamicState3ColorBlendEquation-07356
  The `extendedDynamicState3ColorBlendEquation` feature must be enabled

Valid Usage (Implicit)

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

- VUID-vkCmdSetColorBlendEquationEXT-pColorBlendEquations-parameter
  `pColorBlendEquations` must be a valid pointer to an array of `attachmentCount` valid VkColorBlendEquationEXT structures

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

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

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

- VUID-vkCmdSetColorBlendEquationEXT-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, VkColorBlendEquationEXT, 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 2014-2022 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0