| // Copyright 2016-2021 The Khronos Group Inc. |
| // |
| // SPDX-License-Identifier: CC-BY-4.0 |
| |
| include::{generated}/meta/{refprefix}VK_EXT_direct_mode_display.txt[] |
| |
| === Other Extension Metadata |
| |
| *Last Modified Date*:: |
| 2016-12-13 |
| *IP Status*:: |
| No known IP claims. |
| *Contributors*:: |
| - Pierre Boudier, NVIDIA |
| - James Jones, NVIDIA |
| - Damien Leone, NVIDIA |
| - Pierre-Loup Griffais, Valve |
| - Liam Middlebrook, NVIDIA |
| |
| === Description |
| |
| This is extension, along with related platform extensions, allows |
| applications to take exclusive control of displays associated with a native |
| windowing system. |
| This is especially useful for virtual reality applications that wish to hide |
| HMDs (head mounted displays) from the native platform's display management |
| system, desktop, and/or other applications. |
| |
| include::{generated}/interfaces/VK_EXT_direct_mode_display.txt[] |
| |
| === Issues |
| |
| 1) Should this extension and its related platform-specific extensions |
| leverage `apiext:VK_KHR_display`, or provide separate equivalent interfaces. |
| |
| *RESOLVED*: Use `apiext:VK_KHR_display` concepts and objects. |
| `apiext:VK_KHR_display` can be used to enumerate all displays on the system, |
| including those attached to/in use by a window system or native platform, |
| but `apiext:VK_KHR_display_swapchain` will fail to create a swapchain on |
| in-use displays. |
| This extension and its platform-specific children will allow applications to |
| grab in-use displays away from window systems and/or native platforms, |
| allowing them to be used with `apiext:VK_KHR_display_swapchain`. |
| |
| 2) Are separate calls needed to acquire displays and enable direct mode? |
| |
| *RESOLVED*: No, these operations happen in one combined command. |
| Acquiring a display puts it into direct mode. |
| |
| === Version History |
| |
| * Revision 1, 2016-12-13 (James Jones) |
| - Initial draft |
