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// Copyright 2019-2024 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0
include::{generated}/meta/{refprefix}VK_EXT_swapchain_maintenance1.adoc[]
=== Other Extension Metadata
*Last Modified Date*::
2022-10-28
*Contributors*::
- Jeff Juliano, NVIDIA
- Shahbaz Youssefi, Google
- Chris Forbes, Google
- Ian Elliott, Google
- Yiwei Zhang, Google
- Charlie Lao, Google
- Lina Versace, Google
- Ralph Potter, Samsung
- Igor Nazarov, Samsung
- Hyunchang Kim, Samsung
- Suenghwan Lee, Samsung
- Munseong Kang, Samsung
- Joonyong Park, Samsung
- Hans-Kristian Arntzen, Valve
- Lisa Wu, Arm
- Daniel Stone, Collabora
- Pan Gao, Huawei
=== Description
`apiext:VK_EXT_swapchain_maintenance1` adds a collection of window system
integration features that were intentionally left out or overlooked in the
original `apiext:VK_KHR_swapchain` extension.
The new features are as follows:
* Specify a fence that will be signaled when the resources associated with
a present operation can: be safely destroyed.
* Allow changing the present mode a swapchain is using at per-present
granularity.
* Allow applications to define the behavior when presenting a swapchain
image to a surface with different dimensions than the image.
Using this feature may: allow implementations to avoid returning
ename:VK_ERROR_OUT_OF_DATE_KHR in this situation.
* Allow applications to defer swapchain memory allocation for improved
startup time and memory footprint.
* Allow applications to release previously acquired images without
presenting them.
include::{generated}/interfaces/VK_EXT_swapchain_maintenance1.adoc[]
=== Version History
* Revision 0, 2019-05-28
** Initial revisions
* Revision 1, 2022-08-21 (Shahbaz Youssefi)
** Add functionality and complete spec
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