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22a5a1459f
* Update release number to 124.
Github Issues:
* Fix Makefile SPECREMARK macro to work when not building in a git tree
(public issue 992).
* Ignore pname:aspectMask for unused attachments in
slink:VkSubpassDescription2KHR valid usage statements (public pull
request 1028).
* Minor markup / spelling fixes (public pull requests 1035, 1045).
Internal Issues:
* Fix markup in Valid Usage statement for slink:VkCreateFramebuffer
(internal issue 1823).
* Add a new <<synchronization-signal-operation-order, _signal operation
order_>> section to the synchronization chapter which describes in
detail the ordering guarantees provided by the API between fence and
semaphore signal operations (internal merge request 3368).
* Move generated `appendix/meta/` files into the Makefile GENERATED
directory (internal merge request 3381).
New Extensions
* `<<VK_KHR_shader_clock>>`
* `<<VK_KHR_timeline_semaphore>>`
63 lines
1.8 KiB
Plaintext
63 lines
1.8 KiB
Plaintext
// Copyright (c) 2017-2019 Khronos Group. This work is licensed under a
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// Creative Commons Attribution 4.0 International License; see
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// http://creativecommons.org/licenses/by/4.0/
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include::{generated}/meta/VK_EXT_headless_surface.txt[]
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*Last Modified Date*::
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2019-03-21
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*IP Status*::
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No known IP claims.
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*Contributors*::
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- Ray Smith, Arm
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The `VK_EXT_headless_surface` extension is an instance extension.
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It provides a mechanism to create slink:VkSurfaceKHR objects independently
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of any window system or display device.
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The presentation operation for a swapchain created from a headless surface
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is by default a no-op, resulting in no externally-visible result.
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Because there is no real presentation target, future extensions can layer on
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top of the headless surface to introduce arbitrary or customisable sets of
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restrictions or features.
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These could include features like saving to a file or restrictions to
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emulate a particular presentation target.
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This functionality is expected to be useful for application and driver
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development because it allows any platform to expose an arbitrary or
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customisable set of restrictions and features of a presentation engine.
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This makes it a useful portable test target for applications targeting a
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wide range of presentation engines where the actual target presentation
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engines might be scarce, unavailable or otherwise undesirable or
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inconvenient to use for general Vulkan application development.
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=== New Object Types
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None
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=== New Enum Constants
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* Extending elink:VkStructureType:
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** ename:VK_STRUCTURE_TYPE_HEADLESS_SURFACE_CREATE_INFO_EXT
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=== New Enums
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None
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=== New Structures
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* slink:VkHeadlessSurfaceCreateInfoEXT
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=== New Functions
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* flink:vkCreateHeadlessSurfaceEXT
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=== Issues
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None
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=== Version History
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* Revision 1, 2019-03-21 (Ray Smith)
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- Initial draft
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