# vkGetRenderAreaGranularity(3) Manual Page

## Name

vkGetRenderAreaGranularity - Returns the granularity for optimal render area

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## C Specification

To query the render area granularity, call:

    // Provided by VK_VERSION_1_0
    void vkGetRenderAreaGranularity(
        VkDevice                                    device,
        VkRenderPass                                renderPass,
        VkExtent2D*                                 pGranularity);

## Parameters

- `device` is the logical device that owns the render pass.

- `renderPass` is a handle to a render pass.

- `pGranularity` is a pointer to a VkExtent2D structure in which the granularity is returned.

## Description

The conditions leading to an optimal `renderArea` are:

- the `offset.x` member in `renderArea` is a multiple of the `width` member of the returned VkExtent2D (the horizontal granularity).

- the `offset.y` member in `renderArea` is a multiple of the `height` member of the returned VkExtent2D (the vertical granularity).

- either the `extent.width` member in `renderArea` is a multiple of the horizontal granularity or `offset.x`+`extent.width` is equal to the `width` of the `framebuffer` in the VkRenderPassBeginInfo.

- either the `extent.height` member in `renderArea` is a multiple of the vertical granularity or `offset.y`+`extent.height` is equal to the `height` of the `framebuffer` in the VkRenderPassBeginInfo.

Subpass dependencies are not affected by the render area, and apply to the entire image subresources attached to the framebuffer as specified in the description of automatic layout transitions. Similarly, pipeline barriers are valid even if their effect extends outside the render area.

Valid Usage (Implicit)

- VUID-vkGetRenderAreaGranularity-device-parameter
  `device` must be a valid VkDevice handle

- VUID-vkGetRenderAreaGranularity-renderPass-parameter
  `renderPass` must be a valid VkRenderPass handle

- VUID-vkGetRenderAreaGranularity-pGranularity-parameter
  `pGranularity` must be a valid pointer to a VkExtent2D structure

- VUID-vkGetRenderAreaGranularity-renderPass-parent
  `renderPass` must have been created, allocated, or retrieved from `device`

## See Also

VK_VERSION_1_0, VkDevice, VkExtent2D, VkRenderPass

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0