vkCmdSetBlendConstants(3)

C Specification

To dynamically set and change the blend constants, call:

// Provided by VK_VERSION_1_0
void vkCmdSetBlendConstants(
    VkCommandBuffer                             commandBuffer,
    const float                                 blendConstants[4]);

Parameters

commandBuffer is the command buffer into which the command will be recorded.
blendConstants is a pointer to an array of four values specifying the R_c, G_c, B_c, and A_c components of the blend constant color used in blending, depending on the blend factor.

Description

This command sets blend constants for subsequent drawing commands when when drawing using shader objects, or the graphics pipeline is created with VK_DYNAMIC_STATE_BLEND_CONSTANTS set in VkPipelineDynamicStateCreateInfo::pDynamicStates. Otherwise, this state is specified by the VkPipelineColorBlendStateCreateInfo::blendConstants values used to create the currently active pipeline.

Valid Usage (Implicit)

VUID-vkCmdSetBlendConstants-commandBuffer-parameter
commandBuffer must be a valid VkCommandBuffer handle
VUID-vkCmdSetBlendConstants-commandBuffer-recording
commandBuffer must be in the recording state
VUID-vkCmdSetBlendConstants-commandBuffer-cmdpool
The VkCommandPool that commandBuffer was allocated from must support graphics operations
VUID-vkCmdSetBlendConstants-videocoding
This command must only be called outside of a video coding scope

Host Synchronization

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