Vulkan-Docs/doc/specs/vulkan/appendices/VK_KHR_maintenance1.txt

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// Copyright (c) 2016-2017 Khronos Group. This work is licensed under a
// Creative Commons Attribution 4.0 International License; see
// http://creativecommons.org/licenses/by/4.0/
include::meta/VK_KHR_maintenance1.txt[]
*Last Modified Date*::
2016-10-26
*Contributors*::
- Dan Ginsburg, Valve
- Daniel Koch, NVIDIA
- Daniel Rakos, AMD
- Jan-Harald Fredriksen, ARM
- Jason Ekstrand, Intel
- Jeff Bolz, NVIDIA
- Jesse Hall, Google
- John Kessenich, Google
- Michael Worcester, Imagination Technologies
- Neil Henning, Codeplay Software Ltd.
- Piers Daniell, NVIDIA
- Slawomir Grajewski, Intel
- Tobias Hector, Imagination Technologies
- Tom Olson, ARM
+VK_KHR_maintenance1+ adds a collection of minor features that were
intentionally left out or overlooked from the original Vulkan 1.0 release.
The new features are as follows:
* Allow 2D and 2D array image views to be created from 3D images, which
can then be used as color framebuffer attachments.
This allows applications to render to slices of a 3D image.
* Support flink:vkCmdCopyImage between 2D array layers and 3D slices.
This extension allows copying from layers of a 2D array image to slices
of a 3D image and vice versa.
* Allow negative height to be specified in the
slink:VkViewport::pname:height field to perform y-inversion of the
clip-space to framebuffer-space transform.
This allows apps to avoid having to use `gl_Position.y = -gl_Position.y`
in shaders also targeting other APIs.
* Allow implementations to express support for doing just transfers and
clears of image formats that they otherwise support no other format
features for.
This is done by adding new format feature flags
ename:VK_FORMAT_FEATURE_TRANSFER_SRC_BIT_KHR and
ename:VK_FORMAT_FEATURE_TRANSFER_DST_BIT_KHR.
* Support flink:vkCmdFillBuffer on transfer-only queues.
Previously flink:vkCmdFillBuffer was defined to only work on command
buffers allocated from command pools which support graphics or compute
queues.
It is now allowed on queues that just support transfer operations.
* Fix the inconsistency of how error conditions are returned between the
flink:vkCreateGraphicsPipelines and flink:vkCreateComputePipelines
functions and the flink:vkAllocateDescriptorSets and
flink:vkAllocateCommandBuffers functions.
* Add new ename:VK_ERROR_OUT_OF_POOL_MEMORY_KHR error so implementations
can give a more precise reason for flink:vkAllocateDescriptorSets
failures.
* Add a new command flink:vkTrimCommandPoolKHR which gives the
implementation an opportunity to release any unused command pool memory
back to the system.
=== New Object Types
None.
=== New Enum Constants
* ename:VK_ERROR_OUT_OF_POOL_MEMORY_KHR
* ename:VK_FORMAT_FEATURE_TRANSFER_SRC_BIT_KHR
* ename:VK_FORMAT_FEATURE_TRANSFER_DST_BIT_KHR
* ename:VK_IMAGE_CREATE_2D_ARRAY_COMPATIBLE_BIT_KHR
=== New Enums
None.
=== New Structures
None.
=== New Functions
* flink:vkTrimCommandPoolKHR
=== Issues
None.
=== Version History
* Revision 1, 2016-10-26 (Piers Daniell)
- Internal revisions