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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>>`
64 lines
2.2 KiB
Plaintext
64 lines
2.2 KiB
Plaintext
include::{generated}/meta/VK_EXT_hdr_metadata.txt[]
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*Last Modified Date*::
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2018-12-19
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*IP Status*::
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No known IP claims.
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*Contributors*::
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- Courtney Goeltzenleuchter, Google
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This extension defines two new structures and a function to assign SMPTE
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(the Society of Motion Picture and Television Engineers) 2086 metadata and
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CTA (Consumer Technology Association) 861.3 metadata to a swapchain.
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The metadata includes the color primaries, white point, and luminance range
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of the mastering display, which all together define the color volume that
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contains all the possible colors the mastering display can produce.
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The mastering display is the display where creative work is done and
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creative intent is established.
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To preserve such creative intent as much as possible and achieve consistent
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color reproduction on different viewing displays, it is useful for the
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display pipeline to know the color volume of the original mastering display
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where content was created or tuned.
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This avoids performing unnecessary mapping of colors that are not
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displayable on the original mastering display.
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The metadata also includes the pname:maxContentLightLevel and
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pname:maxFrameAverageLightLevel as defined by CTA 861.3.
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While the general purpose of the metadata is to assist in the transformation
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between different color volumes of different displays and help achieve
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better color reproduction, it is not in the scope of this extension to
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define how exactly the metadata should be used in such a process.
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It is up to the implementation to determine how to make use of the metadata.
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=== New Enum Constants
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* Extending elink:VkStructureType:
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** ename:VK_STRUCTURE_TYPE_HDR_METADATA_EXT
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=== New Structures
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* slink:VkXYColorEXT
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* slink:VkHdrMetadataEXT
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=== New Functions
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* flink:vkSetHdrMetadataEXT
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=== Issues
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1) Do we need a query function?
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*PROPOSED*: No, Vulkan does not provide queries for state that the
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application can track on its own.
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2) Should we specify default if not specified by the application?
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*PROPOSED*: No, that leaves the default up to the display.
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=== Version History
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* Revision 1, 2016-12-27 (Courtney Goeltzenleuchter)
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- Initial version
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* Revision 2, 2018-12-19 (Courtney Goeltzenleuchter)
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- Correct implicit validity for VkHdrMetadataEXT structure
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