1// Copyright 2016-2022 The Khronos Group Inc. 2// 3// SPDX-License-Identifier: CC-BY-4.0 4 5include::{generated}/meta/{refprefix}VK_EXT_direct_mode_display.adoc[] 6 7=== Other Extension Metadata 8 9*Last Modified Date*:: 10 2016-12-13 11*IP Status*:: 12 No known IP claims. 13*Contributors*:: 14 - Pierre Boudier, NVIDIA 15 - James Jones, NVIDIA 16 - Damien Leone, NVIDIA 17 - Pierre-Loup Griffais, Valve 18 - Liam Middlebrook, NVIDIA 19 20=== Description 21 22This is extension, along with related platform extensions, allows 23applications to take exclusive control of displays associated with a native 24windowing system. 25This is especially useful for virtual reality applications that wish to hide 26HMDs (head mounted displays) from the native platform's display management 27system, desktop, and/or other applications. 28 29include::{generated}/interfaces/VK_EXT_direct_mode_display.adoc[] 30 31=== Issues 32 331) Should this extension and its related platform-specific extensions 34leverage `apiext:VK_KHR_display`, or provide separate equivalent interfaces. 35 36*RESOLVED*: Use `apiext:VK_KHR_display` concepts and objects. 37`apiext:VK_KHR_display` can be used to enumerate all displays on the system, 38including those attached to/in use by a window system or native platform, 39but `apiext:VK_KHR_display_swapchain` will fail to create a swapchain on 40in-use displays. 41This extension and its platform-specific children will allow applications to 42grab in-use displays away from window systems and/or native platforms, 43allowing them to be used with `apiext:VK_KHR_display_swapchain`. 44 452) Are separate calls needed to acquire displays and enable direct mode? 46 47*RESOLVED*: No, these operations happen in one combined command. 48Acquiring a display puts it into direct mode. 49 50=== Version History 51 52 * Revision 1, 2016-12-13 (James Jones) 53 ** Initial draft 54