mirror of
https://github.com/status-im/Vulkan-Docs.git
synced 2025-01-12 06:54:14 +00:00
f985a50c1f
* Bump API patch number and header version number to 46 for this update.
Github Issues:
* Add language to the <<fundamentals-validusage-enums, Valid Usage for
Enumerated Types>> section allowing values to be returned from Vulkan
that are not present in extensions explicitly enabled by the
application, similar to existing language for bit flags in the
<<fundamentals-validusage-flags, Valid Usage for Flags>> section (public
issue 442).
* *Important*: run `gem update --pre asciidoctor-pdf` before trying to
build this version of the spec - 1.5.0.alpha15 is required for this
change. Removes the monkey patch currently used to draw valid usage
blocks across multiple pages which had numerous issues. A fixed version
was incorporated into Asciidoctor-PDF for the latest release, so the
monkey patch or any variant thereof is no longer required (public issue
465).
Internal Issues:
* Add ename:VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE_KHR_EXT
to `VK_EXT_debug_report` extension
* Fix ptext:pNext member of
slink:VkPhysicalDeviceDiscardRectanglePropertiesEXT to be a non-const
pointer. Properties structures return values, so the chain should be
non-const.
* Explicitly remove gl_NumSamples from the `GL_KHR_vulkan_glsl` extension,
against 1.0 (internal issue 612).
* Add Valid Usage statements requiring that each structure type valid in a
ptext:pNext chain must: not appear more than once in a chain (internal
issue 752).
* Use ename:VK_USE_PLATFORM_WIN32_KHX in the
`VK_KHX_external_memory_win32` extension, rather than etext:_KHR
(internal issue 754).
New Extensions:
* `VK_KHR_incremental_present`
116 lines
3.2 KiB
Plaintext
116 lines
3.2 KiB
Plaintext
// Copyright (c) 2014-2017 The Khronos Group Inc.
|
|
// Copyright notice at https://www.khronos.org/registry/speccopyright.html
|
|
|
|
[[VK_KHR_incremental_present]]
|
|
== VK_KHR_incremental_present
|
|
|
|
*Name String*::
|
|
+VK_KHR_incremental_present+
|
|
*Extension Type*::
|
|
Device extension
|
|
*Registered Extension Number*::
|
|
85
|
|
*Last Modified Date*::
|
|
2016-11-02
|
|
*Revision*::
|
|
1
|
|
*IP Status*::
|
|
No known IP claims.
|
|
*Dependencies*::
|
|
- This extension is written against version 1.0 of the Vulkan API.
|
|
- Requires +VK_KHR_swapchain+ (revision 68).
|
|
*Contributors*::
|
|
- Ian Elliott, Google
|
|
- Jesse Hall, Google
|
|
- Alon Or-bach, Samsung
|
|
- James Jones, NVIDIA
|
|
- Daniel Rakos, AMD
|
|
- Ray Smith, ARM
|
|
- Mika Isojarvi, Google
|
|
- Jeff Juliano, NVIDIA
|
|
- Jeff Bolz, NVIDIA
|
|
*Contacts*::
|
|
- Ian Elliott, Google
|
|
|
|
This device extension extends slink:vkQueuePresentKHR, from the
|
|
+VK_KHR_swapchain+ extension, allowing an application to specify a list of
|
|
rectangular, modified regions of each image to present.
|
|
This should be used in situations where an application is only changing a
|
|
small portion of the presentable images within a swapchain, since it enables
|
|
the presentation engine to avoid wasting time presenting parts of the
|
|
surface that haven't changed.
|
|
|
|
This extension is leveraged from the +EGL_KHR_swap_buffers_with_damage+
|
|
extension.
|
|
|
|
=== New Object Types
|
|
|
|
None.
|
|
|
|
=== New Enum Constants
|
|
|
|
* Extending ename:VkStructureType:
|
|
** ename:VK_STRUCTURE_TYPE_PRESENT_REGIONS_KHR
|
|
|
|
=== New Enums
|
|
|
|
None.
|
|
|
|
=== New Structures
|
|
|
|
* slink:VkRectLayerKHR
|
|
* slink:VkPresentRegionKHR
|
|
* slink:VkPresentRegionsKHR
|
|
|
|
=== New Functions
|
|
|
|
None.
|
|
|
|
=== Examples
|
|
|
|
None.
|
|
|
|
=== Issues
|
|
|
|
1) How should we handle steroescopic-3D swapchains? We need to add a layer
|
|
for each rectangle.
|
|
One approach is to create another struct that contains the slink:VkRect2D
|
|
plus layer, and have slink:VkPresentRegionsKHR point to an array of that
|
|
struct.
|
|
Another approach is to have two parallel arrays, pRectangles and pLayers,
|
|
where pRectangles[i] and pLayers[i] must be used together.
|
|
Which approach should we use, and if the array of a new structure, what
|
|
should that be called?
|
|
|
|
*RESOLVED*: Create a new structure, which is a slink:VkRect2D plus a layer,
|
|
and will be called slink:VkRectLayerKHR.
|
|
|
|
2) Where is the origin of the slink:VkRectLayerKHR?
|
|
|
|
*RESOLVED*: The upper left corner of the presentable image(s) of the
|
|
swapchain, per the definition of framebuffer coordinates.
|
|
|
|
3) Does the rectangular region, slink:VkRectLayerKHR, specify pixels of the
|
|
swapchain's image(s), or of the surface?
|
|
|
|
*RESOLVED*: Of the image(s).
|
|
Some presentation engines may scale the pixels of a swapchain's image(s) to
|
|
the size of the surface.
|
|
The size of the swapchain's image(s) will be consistent, where the size of
|
|
the surface may vary over time.
|
|
|
|
4) What if all of the rectangles for a given swapchain contain a width
|
|
and/or height of zero?
|
|
|
|
*RESOLVED*: The application is indicating that no pixels changed since the
|
|
last present.
|
|
The presentation engine may use such a hint and not update any pixels for
|
|
the swapchain.
|
|
However, all other semantics of flink:vkQueuePresentKHR must still be
|
|
honored, including waiting for semaphores to signal.
|
|
|
|
=== Version History
|
|
|
|
* Revision 1, 2016-11-02 (Ian Elliott)
|
|
- Internal revisions
|