Contact
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Daniel Koch [GitHub]dgkoch 
Other Extension Metadata
- Last Modified Date
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2017-02-15 
- Interactions and External Dependencies
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This extension provides API support for GL_NV_viewport_array2
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This extension requires the geometryShaderandmultiViewportfeatures.
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This extension interacts with the tessellationShaderfeature.
 
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- Contributors
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Piers Daniell, NVIDIA 
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Jeff Bolz, NVIDIA 
 
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Description
This extension adds support for the following SPIR-V extension in Vulkan:
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SPV_NV_viewport_array2
which allows a single primitive to be broadcast to multiple viewports and/or
multiple layers.
A new shader built-in output ViewportMaskNV is provided, which allows a
single primitive to be output to multiple viewports simultaneously.
Also, a new SPIR-V decoration is added to control whether the effective
viewport index is added into the variable decorated with the Layer
built-in decoration.
These capabilities allow a single primitive to be output to multiple layers
simultaneously.
This extension allows variables decorated with the Layer and
ViewportIndex built-ins to be exported from vertex or tessellation
shaders, using the ShaderViewportIndexLayerNV capability.
This extension adds a new ViewportMaskNV built-in decoration that is
available for output variables in vertex, tessellation evaluation, and
geometry shaders, and a new ViewportRelativeNV decoration that can be
added on variables decorated with Layer when using the
ShaderViewportMaskNV capability.
When using GLSL source-based shading languages, the gl_ViewportMask[]
built-in output variable and viewport_relative layout qualifier from
GL_NV_viewport_array2 map to the ViewportMaskNV and
ViewportRelativeNV decorations, respectively.
Behavior is described in the GL_NV_viewport_array2 extension
specification.
| Note | The  | 
New Enum Constants
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VK_NV_VIEWPORT_ARRAY2_EXTENSION_NAME
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VK_NV_VIEWPORT_ARRAY2_SPEC_VERSION
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VK_NV_VIEWPORT_ARRAY_2_EXTENSION_NAME
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VK_NV_VIEWPORT_ARRAY_2_SPEC_VERSION
New or Modified Built-In Variables
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(modified) Layer
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(modified) ViewportIndex
Document Notes
For more information, see the Vulkan Specification
This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.