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b9e9296cd8
* Bump API patch number and header version number to 53 for this update.
Github Issues:
Internal Issues:
* Clarify mappings of coordinates for mutable, compatible image views in
slink:VkImageViewCreateInfo (internal issue 815).
* Make ename:VK_BIND_SFR_BIT require a logical device with multiple
physical devices, so that standard sparse image block dimensions are
only required on systems that support multi-GPU (internal issue 835).
* Convert all files from use of // refBegin .. // refEnd comments to
delimit ref pages, to use of open blocks, and update style guide
accordingly (internal issue 839).
* Add valid usage for slink:VkWriteDescriptorSet when performing updates
to a ename:VK_STORAGE_IMAGE descriptor with layout
ename:VK_IMAGE_LAYOUT_GENERAL.
* Add a hack to the validity generator script to support an odd
interaction between flink:vkCmdFillBuffer and an extension (internal
issue 853).
* Remove redundant text describing slink:VkBufferCreateInfo::pname:usage,
which was already covered by implicit valid usage (internal issue 854).
* Update implicit validity generator script to properly handle the
pname:sType and pname:pNext members of "returnedonly" structures
(internal issue 874).
* Note that slink:VkApplicationInfo::pname:pApplicationName &
slink:VkApplicationInfo::pname:pEngineName are optional, and add missing
implicit valid usage statements for flink:vkDestroyInstance.
* Added missing valid usage for flink:vkCmdWriteTimestamp to require a
timestamp query pool.
* Simplify and/or split "`non-atomic`" valid usage statements.
New Extensions:
* `VK_AMD_gpu_shader_int16`
* `VK_EXT_blend_operation_advanced`
* `VK_EXT_sampler_filter_minmax`
* `VK_NV_framebuffer_mixed_samples`
-----------------------------------------------------
Note: the 1.0.52 spec wasn't published on github, so the 1.0.53 release
combines both change sets.
-----------------------------------------------------
Change log for June 13, 2017 Vulkan 1.0.52 spec update:
* Bump API patch number and header version number to 52 for this update.
Github Issues:
Internal Issues:
* Clarify behavior when non-coherent memory has
<<memory-device-unmap-does-not-flush, not been flushed before being
unmapped>> (internal issue 819).
* Fix description of code:WorkgroupSize builtin to note it decorates an
object, not a variable (internal issue 836).
* Fix asciidoc attributes so that trailing '{plus}' symbols in [eq] style
equations are rendered properly (internal issue 845).
* Add language to the "`Extension Handles, Objects, Enums, and Typedefs`"
section of the Procedures and Conventions document stating that any new
handle type requires a corresponding entry in the elink:VkObjectType
enumerated type (internal issue 856).
* Update style guide to use slink macro for Vulkan handle type names, and
define narrow conditions under which to use the *name and *text macros
instead of *link (internal issue 886).
* Add a dependency of the <<VK_KHX_device_group,VK_KHX_device_group>>
extension on VK_KHX_device_group_creation to +vk.xml+ and the extension
appendix.
* Change the copyright on Vulkan specification asciidoc *source* files to
CC-BY 4.0, and update the proprietary Khronos copyright applied to the
generated *output* formats (internal issue 327). This enables broader
re-use and modification of the Vulkan specification sources, while not
affecting the Reciprocal IP License between Vulkan Adopters and Working
Group Members.
New Extensions:
* `VK_NV_fill_rectangle`
* `VK_NV_fragment_coverage_to_color`
117 lines
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117 lines
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// Copyright (c) 2014-2017 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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[[VK_KHR_incremental_present]]
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== VK_KHR_incremental_present
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*Name String*::
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+VK_KHR_incremental_present+
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*Extension Type*::
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Device extension
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*Registered Extension Number*::
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85
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*Last Modified Date*::
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2016-11-02
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*Revision*::
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1
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*IP Status*::
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No known IP claims.
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*Dependencies*::
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- This extension is written against version 1.0 of the Vulkan API.
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- Requires +VK_KHR_swapchain+ (revision 68).
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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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*Contacts*::
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- Ian Elliott, Google
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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 of
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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, pRectangles and pLayers,
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where pRectangles[i] and pLayers[i] must be used 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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