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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>>`
93 lines
2.7 KiB
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93 lines
2.7 KiB
Plaintext
include::{generated}/meta/VK_EXT_shader_viewport_index_layer.txt[]
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*Last Modified Date*::
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2017-08-08
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*Interactions and External Dependencies*::
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- This extension requires the
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{spirv}/EXT/SPV_EXT_shader_viewport_index_layer.html[`SPV_EXT_shader_viewport_index_layer`]
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SPIR-V extension.
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- This extension requires the
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https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_shader_viewport_layer_array.txt[`GL_ARB_shader_viewport_layer_array`],
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https://www.khronos.org/registry/OpenGL/extensions/AMD/AMD_vertex_shader_layer.txt[`GL_AMD_vertex_shader_layer`],
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https://www.khronos.org/registry/OpenGL/extensions/AMD/AMD_vertex_shader_viewport_index.txt[`GL_AMD_vertex_shader_viewport_index`],
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or
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https://www.khronos.org/registry/OpenGL/extensions/NV/NV_viewport_array2.txt[`GL_NV_viewport_array2`]
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extensions for GLSL source languages.
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- This extension requires the pname:multiViewport feature.
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- This extension interacts with the pname:tessellationShader feature.
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*Contributors*::
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- Piers Daniell, NVIDIA
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- Jeff Bolz, NVIDIA
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- Jan-Harald Fredriksen, ARM
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- Daniel Rakos, AMD
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- Slawomir Grajeswki, Intel
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This extension adds support for the code:ShaderViewportIndexLayerEXT
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capability from the `SPV_EXT_shader_viewport_index_layer` extension in
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Vulkan.
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This extension allows variables decorated with the code:Layer and
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code:ViewportIndex built-ins to be exported from vertex or tessellation
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shaders, using the code:ShaderViewportIndexLayerEXT capability.
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When using GLSL source-based shading languages, the code:gl_ViewportIndex
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and code:gl_Layer built-in variables map to the SPIR-V code:ViewportIndex
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and code:Layer built-in decorations, respectively.
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Behaviour of these variables is extended as described in the
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`GL_ARB_shader_viewport_layer_array` (or the precursor
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`GL_AMD_vertex_shader_layer`, `GL_AMD_vertex_shader_viewport_index`, and
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`GL_NV_viewport_array2` extensions).
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ifdef::VK_NV_viewport_array2[]
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[NOTE]
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.Note
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====
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The code:ShaderViewportIndexLayerEXT capability is equivalent to the
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code:ShaderViewportIndexLayerNV capability added by
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`<<VK_NV_viewport_array2>>`.
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====
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endif::VK_NV_viewport_array2[]
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=== New Object Types
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None.
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=== New Enum Constants
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None.
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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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=== New or Modified Built-In Variables
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* (modified) <<interfaces-builtin-variables-layer,code:Layer>>
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* (modified)
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<<interfaces-builtin-variables-viewportindex,code:ViewportIndex>>
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=== New Variable Decoration
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None.
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=== New SPIR-V Capabilities
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* <<spirvenv-capabilities-table-shader-viewport-index-layer,code:ShaderViewportIndexLayerEXT>>
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=== Issues
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None yet!
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=== Version History
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* Revision 1, 2017-08-08 (Daniel Koch)
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- Internal drafts
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