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* Update release number to 77.
Public Issues:
* Remove redundant asciidoctor ifdef in slink:VkDeviceCreateInfo valid
usage statement (public pull request 718).
Internal Issues:
* Require that the returned slink:VkMemoryRequirements::pname:alignment
reflect the minimum alignment requirements for the buffer's usages, and
make dynamic offset alignment valid usage more explicit for
flink:vkBindBufferMemory and flink:vkCmdBindDescriptorSets (internal
issue 1170).
* Explicitly state that objects of type code:OpTypeImage,
code:OpTypeSampler, and code:OpTypeSampledImage must not be stored to in
the <<spirvenv-module-validation, Validation Rules within a Module>>
section (internal issue 1262).
* Clarify rules about validating descriptor set/binding against storage
class and descriptor type in the <<spirvenv-module-validation,
Validation Rules within a Module>> section, and add an anchor for and
references to the <<interfaces-resources-storage-class-correspondence,
Shader Resource and Storage Class Correspondence>> table (internal issue
1266).
* Use correct spelling of SPIR-V decoration code:NonWritable in several
places (internal issue 1298).
Other Issues:
* Update specification links to files in the old
KhronosGroup/Vulkan-LoaderAndValidationLayers repository with
corresponding links into the new repositories that replace it.
* Move validity requirement for slink:VkSamplerCreateInfo into the valid
usage block instead of the body text, and give it a VUID.
* Use the full name of the "`style guide`" in a reference in the
description of slink:vkGetPhysicalDeviceProperties, update the
<<vulkan-styleguide, link to that document>>, and use the the full name
in the registry index page.
82 lines
2.2 KiB
Plaintext
82 lines
2.2 KiB
Plaintext
// 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_GOOGLE_display_timing.txt[]
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*Last Modified Date*::
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2017-02-14
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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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This device extension allows an application that uses the
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`<<VK_KHR_swapchain>>` extension to obtain information about the
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presentation engine's display, to obtain timing information about each
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present, and to schedule a present to happen no earlier than a desired time.
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An application can use this to minimize various visual anomalies (e.g.
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stuttering).
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Traditional game and real-time animation applications need to correctly
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position their geometry for when the presentable image will be presented to
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the user.
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To accomplish this, applications need various timing information about the
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presentation engine's display.
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They need to know when presentable images were actually presented, and when
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they could have been presented.
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Applications also need to tell the presentation engine to display an image
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no sooner than a given time.
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This allows the application to avoid stuttering, so the animation looks
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smooth to the user.
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This extension treats variable-refresh-rate (VRR) displays as if they are
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fixed-refresh-rate (FRR) displays.
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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_TIMES_INFO_GOOGLE
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=== New Enums
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None.
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=== New Structures
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* slink:VkRefreshCycleDurationGOOGLE
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* slink:VkPastPresentationTimingGOOGLE
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* slink:VkPresentTimesInfoGOOGLE
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* slink:VkPresentTimeGOOGLE
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=== New Functions
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* flink:vkGetRefreshCycleDurationGOOGLE
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* flink:vkGetPastPresentationTimingGOOGLE
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=== Issues
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None.
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=== Examples
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[NOTE]
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.Note
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====
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The example code for the this extension (like the `<<VK_KHR_surface>>` and
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`VK_GOOGLE_display_timing` extensions) is contained in the cube demo that is
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shipped with the official Khronos SDK, and is being kept up-to-date in that
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location (see:
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https://github.com/KhronosGroup/Vulkan-Tools/blob/master/cube/cube.c ).
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====
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=== Version History
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* Revision 1, 2017-02-14 (Ian Elliott)
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- Internal revisions
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