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b7b1c3a65d
* Bump API patch number and header version number to 67 for this update.
* Update copyright dates to 2018
Github Issues:
* Fix texture lookup functions in `GL_KHR_vulkan_glsl` specification
(public pull request 363).
* Clarify the state waited semaphores are left in when a call to
flink:vkQueuePresentKHR fails (public issue 572).
* Cleanup descriptions of slink:VkObjectTablePushConstantEntryNVX and
slink:VkObjectTableDescriptorSetEntryNVX (public issue 583)
* Remove redundant flink:vkCmdSetDiscardRectangleEXT valid usage
statements (public pull 586).
* Make dynamic state array length valid usage statements implicit for
flink:vkCmdSetViewportWScalingNV, flink:vkCmdSetDiscardRectangleEXT, and
flink:vkCmdSetViewport (public pull 589).
* Clarify meaning of window extent (0,0) in slink:VkSwapchainKHR for the
Windows and X11 platforms, in their respective extensions (public issue
590).
* Allow flink:vkGetPastPresentationTimingGOOGLE to return
ename:VK_INCOMPLETE (public issue 604).
* Add synchronization valid usage statements to flink:vkAcquireNextImage
(public pull 611).
* Fix some broken external links and internal xrefs (public pull 613).
* Clean up slink:VkViewport valid usage statements in the presence or
absence of relevant extensions (public pull 623).
* Remove
ename:VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL_KHR
token from VK_KHR_maintenance2 from the non-extension VU path for
slink:VkGraphicsPipelineCreateInfo (public issue 628).
* Miscellaneous minor markup fixes - extension name strings (public pull
631), Notes (pull 633), queue names emitted by generator scripts (pull
634), block formatting in slink:VkDescriptorUpdateTemplateEntryKHR (pull
635), ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_CUBIC_BIT_IMG (pull
641), quotes and apostrophes (pull 643),
* Miscellaneous minor grammar fixes (public pull 644).
* Fix markup macros so usage like ptext:*Src* works (public pull 647).
Internal Issues:
* Clarify in the `VK_KHR_surface` and `VK_KHR_swapchain` extensions that
parameter combinations which aren't supported for normal images are also
unsupported for presentable images, even if the parameter values are
individually supported as reported by the surface capability queries
(internal issue 1029).
* Fixed XML typo in the valid value field of the pname:sType member of
slink:VkPhysicalDeviceExternalMemoryHostPropertiesEXT (internal issue
1100).
Other Issues:
* Add memory semantics validity rules to the <<spirvenv-module-validation,
Validation Rules within a Module>> section of the SPIR-V environment
appendix, and specify that sequentiality consistency is not supported.
This forbids certain cases like "`Load+Release`" that we don't expect to
ever be meaningful.
* Document mapping of OpenGL Shading Language barriers to SPIR-V scope and
semantics in the `GL_KHR_vulkan_glsl` specification.
New Extensions:
* `VK_EXT_conservative_rasterization`
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// Copyright (c) 2014-2018 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::meta/VK_KHR_incremental_present.txt[]
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*Last Modified Date*::
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2016-11-02
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*IP Status*::
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No known IP claims.
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*Contributors*::
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- Ian Elliott, Google
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- Jesse Hall, Google
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- Alon Or-bach, Samsung
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- James Jones, NVIDIA
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- Daniel Rakos, AMD
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- Ray Smith, ARM
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- Mika Isojarvi, Google
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- Jeff Juliano, NVIDIA
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- Jeff Bolz, NVIDIA
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This device extension extends slink:vkQueuePresentKHR, from the
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`<<VK_KHR_swapchain>>` extension, allowing an application to specify a list
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of rectangular, modified regions of each image to present.
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This should be used in situations where an application is only changing a
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small portion of the presentable images within a swapchain, since it enables
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the presentation engine to avoid wasting time presenting parts of the
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surface that haven't changed.
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This extension is leveraged from the +EGL_KHR_swap_buffers_with_damage+
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extension.
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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_PRESENT_REGIONS_KHR
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=== New Enums
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None.
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=== New Structures
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* slink:VkRectLayerKHR
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* slink:VkPresentRegionKHR
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* slink:VkPresentRegionsKHR
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=== New Functions
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None.
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=== Examples
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None.
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=== Issues
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1) How should we handle steroescopic-3D swapchains? We need to add a layer
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for each rectangle.
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One approach is to create another struct that contains the slink:VkRect2D
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plus layer, and have slink:VkPresentRegionsKHR point to an array of that
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struct.
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Another approach is to have two parallel arrays, ptext:pRectangles and
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ptext:pLayers, where ptext:pRectangles[i] and ptext:pLayers[i] must be used
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together.
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Which approach should we use, and if the array of a new structure, what
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should that be called?
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*RESOLVED*: Create a new structure, which is a slink:VkRect2D plus a layer,
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and will be called slink:VkRectLayerKHR.
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2) Where is the origin of the slink:VkRectLayerKHR?
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*RESOLVED*: The upper left corner of the presentable image(s) of the
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swapchain, per the definition of framebuffer coordinates.
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3) Does the rectangular region, slink:VkRectLayerKHR, specify pixels of the
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swapchain's image(s), or of the surface?
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*RESOLVED*: Of the image(s).
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Some presentation engines may scale the pixels of a swapchain's image(s) to
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the size of the surface.
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The size of the swapchain's image(s) will be consistent, where the size of
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the surface may vary over time.
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4) What if all of the rectangles for a given swapchain contain a width
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and/or height of zero?
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*RESOLVED*: The application is indicating that no pixels changed since the
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last present.
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The presentation engine may use such a hint and not update any pixels for
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the swapchain.
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However, all other semantics of flink:vkQueuePresentKHR must still be
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honored, including waiting for semaphores to signal.
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=== Version History
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* Revision 1, 2016-11-02 (Ian Elliott)
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- Internal revisions
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