2019-01-06 03:40:12 +00:00
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// Copyright (c) 2014-2019 Khronos Group. This work is licensed under a
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Change log for November 25, 2018 Vulkan 1.1.94 spec update:
* Update release number to 94.
Public Issues:
* Use the terms "`texel block`" and "`texel block size`" instead of "`data
element`" and "`element size`", and define "`element`" as an array slot.
In addition to the terminology changes, retitled the <<texel-block-size,
Representation and Texel Block Size>> section and added texel block size
/ no. of texels/block information to the
<<features-formats-compatibility, Compatible Formats>> table. There is
some additional work underway to make sure the compatibility language
makes sense for all of uncompressed, compressed, and multiplanar formats
(public issue 763).
* Cleanup `VK_NV_ray_tracing` language (public issues 858, 859).
Internal Issues:
* Specify in <<shaders-invocationgroups, Invocation and Derivative
Groups>> and <<textures-output-format-conversion, Texel Output Format
Conversion>> that derivative groups are quads when code:SubgroupSize >=
4 (internal issue 1390).
* Make the type of slink:VkDescriptorUpdateTemplateCreateInfo::pNext
`const` following pattern for the other stext:Vk*CreateInfo structures
(internal issue 1459).
* Specify that flink:vkCmdClearAttachments executes as a drawing command,
rather than a transfer command (internal issue 1463).
* Update `VK_NV_ray_tracing` to use code:InstanceId instead of
code:InstanceIndex.
New Extensions:
* `VK_KHR_swapchain_mutable_format`
* `VK_EXT_fragment_density_map`
2018-11-26 07:27:30 +00:00
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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_swapchain_mutable_format.txt[]
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*Last Modified Date*::
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2018-03-28
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*IP Status*::
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No known IP claims.
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*Contributors*::
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- Jason Ekstrand, Intel
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- Jan-Harald Fredriksen, ARM
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- Jesse Hall, Google
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- Daniel Rakos, AMD
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- Ray Smith, ARM
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=== Short Description
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Allows processing of swapchain images as different formats to that used by
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the window system, which is particularly useful for switching between sRGB
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and linear RGB formats.
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=== Description
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This extension adds a new swapchain creation flag that enables creating
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image views from presentable images with a different format than the one
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used to create the swapchain.
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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:VkSwapchainCreateFlagBitsKHR:
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** ename:VK_SWAPCHAIN_CREATE_MUTABLE_FORMAT_BIT_KHR
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=== New Enums
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None.
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=== New Structures
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None.
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=== New Functions
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None.
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=== Issues
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1) Are there any new capabilities needed?
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*RESOLVED*: No.
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It is expected that all implementations exposing this extension support
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swapchain image format mutability.
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2) Do we need a separate etext:VK_SWAPCHAIN_CREATE_EXTENDED_USAGE_BIT_KHR?
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*RESOLVED*: No.
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This extension requires `VK_KHR_maintenance2` and presentable images of
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swapchains created with ename:VK_SWAPCHAIN_CREATE_MUTABLE_FORMAT_BIT_KHR are
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created internally in a way equivalent to specifying both
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ename:VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT and
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ename:VK_IMAGE_CREATE_EXTENDED_USAGE_BIT_KHR.
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3) Do we need a separate structure to allow specifying an image format list
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for swapchains?
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*RESOLVED*: No.
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We simply use the same slink:VkImageFormatListCreateInfoKHR structure
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introduced by `VK_KHR_image_format_list`.
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The structure is required to be included in the pname:pNext chain of
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slink:VkSwapchainCreateInfoKHR for swapchains created with
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ename:VK_SWAPCHAIN_CREATE_MUTABLE_FORMAT_BIT_KHR.
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=== Version History
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* Revision 1, 2018-03-28 (Daniel Rakos)
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- Internal revisions.
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