C Specification

To dynamically set the discard rectangles, call:

// Provided by VK_EXT_discard_rectangles
void vkCmdSetDiscardRectangleEXT(
    VkCommandBuffer                             commandBuffer,
    uint32_t                                    firstDiscardRectangle,
    uint32_t                                    discardRectangleCount,
    const VkRect2D*                             pDiscardRectangles);


  • commandBuffer is the command buffer into which the command will be recorded.

  • firstDiscardRectangle is the index of the first discard rectangle whose state is updated by the command.

  • discardRectangleCount is the number of discard rectangles whose state are updated by the command.

  • pDiscardRectangles is a pointer to an array of VkRect2D structures specifying discard rectangles.


The discard rectangle taken from element i of pDiscardRectangles replace the current state for the discard rectangle at index firstDiscardRectangle + i, for i in [0, discardRectangleCount).

This command sets the discard rectangles for subsequent drawing commands when the graphics pipeline is created with VK_DYNAMIC_STATE_DISCARD_RECTANGLE_EXT set in VkPipelineDynamicStateCreateInfo::pDynamicStates. Otherwise, this state is specified by the VkPipelineDiscardRectangleStateCreateInfoEXT::pDiscardRectangles values used to create the currently active pipeline.

Valid Usage
  • VUID-vkCmdSetDiscardRectangleEXT-firstDiscardRectangle-00585
    The sum of firstDiscardRectangle and discardRectangleCount must be less than or equal to VkPhysicalDeviceDiscardRectanglePropertiesEXT::maxDiscardRectangles

  • VUID-vkCmdSetDiscardRectangleEXT-x-00587
    The x and y member of offset in each VkRect2D element of pDiscardRectangles must be greater than or equal to 0

  • VUID-vkCmdSetDiscardRectangleEXT-offset-00588
    Evaluation of (offset.x + extent.width) in each VkRect2D element of pDiscardRectangles must not cause a signed integer addition overflow

  • VUID-vkCmdSetDiscardRectangleEXT-offset-00589
    Evaluation of (offset.y + extent.height) in each VkRect2D element of pDiscardRectangles must not cause a signed integer addition overflow

Valid Usage (Implicit)
  • VUID-vkCmdSetDiscardRectangleEXT-commandBuffer-parameter
    commandBuffer must be a valid VkCommandBuffer handle

  • VUID-vkCmdSetDiscardRectangleEXT-pDiscardRectangles-parameter
    pDiscardRectangles must be a valid pointer to an array of discardRectangleCount VkRect2D structures

  • VUID-vkCmdSetDiscardRectangleEXT-commandBuffer-recording
    commandBuffer must be in the recording state

  • VUID-vkCmdSetDiscardRectangleEXT-commandBuffer-cmdpool
    The VkCommandPool that commandBuffer was allocated from must support graphics operations

  • VUID-vkCmdSetDiscardRectangleEXT-discardRectangleCount-arraylength
    discardRectangleCount 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 Supported Queue Types Command Type





See Also

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 2014-2023 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0