vulkan-3.8.1: Bindings to the Vulkan graphics API.
Safe HaskellNone
LanguageHaskell2010

Vulkan.Extensions.VK_NVX_multiview_per_view_attributes

Description

Name

VK_NVX_multiview_per_view_attributes - device extension

VK_NVX_multiview_per_view_attributes

Name String
VK_NVX_multiview_per_view_attributes
Extension Type
Device extension
Registered Extension Number
98
Revision
1
Extension and Version Dependencies
  • Requires Vulkan 1.0
  • Requires VK_KHR_multiview
Contact

Other Extension Metadata

Last Modified Date
2017-01-13
IP Status
No known IP claims.
Interactions and External Dependencies
Contributors
  • Jeff Bolz, NVIDIA
  • Daniel Koch, NVIDIA

Description

This extension adds a new way to write shaders to be used with multiview subpasses, where the attributes for all views are written out by a single invocation of the vertex processing stages. Related SPIR-V and GLSL extensions SPV_NVX_multiview_per_view_attributes and GL_NVX_multiview_per_view_attributes introduce per-view position and viewport mask attributes arrays, and this extension defines how those per-view attribute arrays are interpreted by Vulkan. Pipelines using per-view attributes may only execute the vertex processing stages once for all views rather than once per-view, which reduces redundant shading work.

A subpass creation flag controls whether the subpass uses this extension. A subpass must either exclusively use this extension or not use it at all.

Some Vulkan implementations only support the position attribute varying between views in the X component. A subpass can declare via a second creation flag whether all pipelines compiled for this subpass will obey this restriction.

Shaders that use the new per-view outputs (e.g. gl_PositionPerViewNV) must also write the non-per-view output (gl_Position), and the values written must be such that gl_Position = gl_PositionPerViewNV[gl_ViewIndex] for all views in the subpass. Implementations are free to either use the per-view outputs or the non-per-view outputs, whichever would be more efficient.

If VK_NV_viewport_array2 is not also supported and enabled, the per-view viewport mask must not be used.

New Structures

New Enum Constants

New Built-In Variables

New SPIR-V Capabilities

Examples

#version 450 core

#extension GL_KHX_multiview : enable
#extension GL_NVX_multiview_per_view_attributes : enable

layout(location = 0) in vec4 position;
layout(set = 0, binding = 0) uniform Block { mat4 mvpPerView[2]; } buf;

void main()
{
    // Output both per-view positions and gl_Position as a function
    // of gl_ViewIndex
    gl_PositionPerViewNV[0] = buf.mvpPerView[0] * position;
    gl_PositionPerViewNV[1] = buf.mvpPerView[1] * position;
    gl_Position = buf.mvpPerView[gl_ViewIndex] * position;
}

Version History

  • Revision 1, 2017-01-13 (Jeff Bolz)

    • Internal revisions

See Also

PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX

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.

Synopsis

Documentation

data PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX Source #

VkPhysicalDeviceMultiviewPerViewAttributesPropertiesNVX - Structure describing multiview limits that can be supported by an implementation

Members

The members of the PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX structure describe the following implementation-dependent limits:

Description

If the PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX structure is included in the pNext chain of PhysicalDeviceProperties2, it is filled with the implementation-dependent limits.

Valid Usage (Implicit)

See Also

Bool32, StructureType

Constructors

PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX 

Fields

  • perViewPositionAllComponents :: Bool

    perViewPositionAllComponents is TRUE if the implementation supports per-view position values that differ in components other than the X component.

Instances

Instances details
Eq PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX Source # 
Instance details

Defined in Vulkan.Extensions.VK_NVX_multiview_per_view_attributes

Show PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX Source # 
Instance details

Defined in Vulkan.Extensions.VK_NVX_multiview_per_view_attributes

Storable PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX Source # 
Instance details

Defined in Vulkan.Extensions.VK_NVX_multiview_per_view_attributes

FromCStruct PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX Source # 
Instance details

Defined in Vulkan.Extensions.VK_NVX_multiview_per_view_attributes

ToCStruct PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX Source # 
Instance details

Defined in Vulkan.Extensions.VK_NVX_multiview_per_view_attributes

Zero PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX Source # 
Instance details

Defined in Vulkan.Extensions.VK_NVX_multiview_per_view_attributes

type NVX_MULTIVIEW_PER_VIEW_ATTRIBUTES_EXTENSION_NAME = "VK_NVX_multiview_per_view_attributes" Source #