vkCmdSetViewportWithCountEXT(3)

# vkCmdSetViewportWithCountEXT(3) Manual Page

## Name

vkCmdSetViewportWithCountEXT - Set the viewport count and viewports

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## C Specification

If the bound graphics pipeline state was created with the `VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT` dynamic state enabled then the viewport count and viewport transformation parameters are set dynamically by calling:

    // Provided by VK_EXT_extended_dynamic_state
    void vkCmdSetViewportWithCountEXT(
        VkCommandBuffer                             commandBuffer,
        uint32_t                                    viewportCount,
        const VkViewport*                           pViewports);

## Parameters

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

- `viewportCount` specifies the viewport count.

- `pViewports` specifies the viewports to use for drawing.

## Description

Valid Usage

- VUID-vkCmdSetViewportWithCountEXT-None-03393
  The extendedDynamicState feature must be enabled

- VUID-vkCmdSetViewportWithCountEXT-viewportCount-03394
  `viewportCount` must be between `1` and `VkPhysicalDeviceLimits`::`maxViewports`, inclusive

- VUID-vkCmdSetViewportWithCountEXT-viewportCount-03395
  If the multiple viewports feature is not enabled, `viewportCount` must be `1`

Valid Usage (Implicit)

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

- VUID-vkCmdSetViewportWithCountEXT-pViewports-parameter
  `pViewports` must be a valid pointer to an array of `viewportCount` valid VkViewport structures

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

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

- VUID-vkCmdSetViewportWithCountEXT-viewportCount-arraylength
  `viewportCount` 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 | Pipeline Type
--- | --- | --- | ---
Primary Secondary | Both | Graphics |

## See Also

VkCommandBuffer, VkViewport

## 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 2014-2021 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0