vkCmdSetLineWidth(3)

# vkCmdSetLineWidth(3) Manual Page

## Name

vkCmdSetLineWidth - Set line width dynamically for a command buffer

## C Specification

To dynamically set the line width, call:

    // Provided by VK_VERSION_1_0
    void vkCmdSetLineWidth(
        VkCommandBuffer                             commandBuffer,
        float                                       lineWidth);

## Parameters

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

- `lineWidth` is the width of rasterized line segments.

## Description

This command sets the line width for subsequent drawing commands when drawing using shader objects, or when the graphics pipeline is created with VK_DYNAMIC_STATE_LINE_WIDTH set in VkPipelineDynamicStateCreateInfo::`pDynamicStates`. Otherwise, this state is specified by the VkPipelineRasterizationStateCreateInfo::`lineWidth` value used to create the currently active pipeline.

Valid Usage

- VUID-vkCmdSetLineWidth-lineWidth-00788
  If the `wideLines` feature is not enabled, `lineWidth` must be `1.0`

Valid Usage (Implicit)

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

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

- VUID-vkCmdSetLineWidth-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support VK_QUEUE_GRAPHICS_BIT operations

- VUID-vkCmdSetLineWidth-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

Command Properties

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

Conditional Rendering

vkCmdSetLineWidth is not affected by conditional rendering

## See Also

VK_VERSION_1_0, 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 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0