108 lines
3.5 KiB
Plaintext
108 lines
3.5 KiB
Plaintext
// Copyright (c) 2014-2018 Khronos Group. This work is licensed under a
|
|
// Creative Commons Attribution 4.0 International License; see
|
|
// http://creativecommons.org/licenses/by/4.0/
|
|
|
|
include::meta/VK_KHR_wayland_surface.txt[]
|
|
|
|
*Last Modified Date*::
|
|
2015-11-28
|
|
*IP Status*::
|
|
No known IP claims.
|
|
*Contributors*::
|
|
- Patrick Doane, Blizzard
|
|
- Jason Ekstrand, Intel
|
|
- Ian Elliott, LunarG
|
|
- Courtney Goeltzenleuchter, LunarG
|
|
- Jesse Hall, Google
|
|
- James Jones, NVIDIA
|
|
- Antoine Labour, Google
|
|
- Jon Leech, Khronos
|
|
- David Mao, AMD
|
|
- Norbert Nopper, Freescale
|
|
- Alon Or-bach, Samsung
|
|
- Daniel Rakos, AMD
|
|
- Graham Sellers, AMD
|
|
- Ray Smith, ARM
|
|
- Jeff Vigil, Qualcomm
|
|
- Chia-I Wu, LunarG
|
|
|
|
The `VK_KHR_wayland_surface` extension is an instance extension.
|
|
It provides a mechanism to create a slink:VkSurfaceKHR object (defined by
|
|
the `<<VK_KHR_surface>>` extension) that refers to a Wayland
|
|
code:wl_surface, as well as a query to determine support for rendering to a
|
|
Wayland compositor.
|
|
|
|
=== New Object Types
|
|
|
|
None
|
|
|
|
=== New Enum Constants
|
|
|
|
* Extending elink:VkStructureType:
|
|
** ename:VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR
|
|
|
|
=== New Enums
|
|
|
|
None
|
|
|
|
=== New Structures
|
|
|
|
* slink:VkWaylandSurfaceCreateInfoKHR
|
|
|
|
=== New Functions
|
|
|
|
* flink:vkCreateWaylandSurfaceKHR
|
|
* flink:vkGetPhysicalDeviceWaylandPresentationSupportKHR
|
|
|
|
=== Issues
|
|
|
|
1) Does Wayland need a way to query for compatibility between a particular
|
|
physical device and a specific Wayland display? This would be a more general
|
|
query than flink:vkGetPhysicalDeviceSurfaceSupportKHR: if the
|
|
Wayland-specific query returned ename:VK_TRUE for a (slink:VkPhysicalDevice,
|
|
`struct wl_display*`) pair, then the physical device could be assumed to
|
|
support presentation to any slink:VkSurfaceKHR for surfaces on the display.
|
|
|
|
*RESOLVED*: Yes.
|
|
flink:vkGetPhysicalDeviceWaylandPresentationSupportKHR was added to address
|
|
this issue.
|
|
|
|
2) Should we require surfaces created with flink:vkCreateWaylandSurfaceKHR
|
|
to support the ename:VK_PRESENT_MODE_MAILBOX_KHR present mode?
|
|
|
|
*RESOLVED*: Yes.
|
|
Wayland is an inherently mailbox window system and mailbox support is
|
|
required for some Wayland compositor interactions to work as expected.
|
|
While handling these interactions may be possible with
|
|
ename:VK_PRESENT_MODE_FIFO_KHR, it is much more difficult to do without
|
|
deadlock and requiring all Wayland applications to be able to support
|
|
implementations which only support ename:VK_PRESENT_MODE_FIFO_KHR would be
|
|
an onerous restriction on application developers.
|
|
|
|
=== Version History
|
|
|
|
* Revision 1, 2015-09-23 (Jesse Hall)
|
|
- Initial draft, based on the previous contents of VK_EXT_KHR_swapchain
|
|
(later renamed VK_EXT_KHR_surface).
|
|
|
|
* Revision 2, 2015-10-02 (James Jones)
|
|
- Added vkGetPhysicalDeviceWaylandPresentationSupportKHR() to resolve
|
|
issue #1.
|
|
- Adjusted wording of issue #1 to match the agreed-upon solution.
|
|
- Renamed "window" parameters to "surface" to match Wayland conventions.
|
|
|
|
* Revision 3, 2015-10-26 (Ian Elliott)
|
|
- Renamed from VK_EXT_KHR_wayland_surface to VK_KHR_wayland_surface.
|
|
|
|
* Revision 4, 2015-11-03 (Daniel Rakos)
|
|
- Added allocation callbacks to vkCreateWaylandSurfaceKHR.
|
|
|
|
* Revision 5, 2015-11-28 (Daniel Rakos)
|
|
- Updated the surface create function to take a pCreateInfo structure.
|
|
|
|
* Revision 6, 2017-02-08 (Jason Ekstrand)
|
|
- Added the requirement that implementations support
|
|
ename:VK_PRESENT_MODE_MAILBOX_KHR.
|
|
- Added wording about interactions between flink:vkQueuePresentKHR and
|
|
the Wayland requests sent to the compositor.
|