Class NVXMultiviewPerViewAttributes
- java.lang.Object
-
- org.lwjgl.vulkan.NVXMultiviewPerViewAttributes
-
public final class NVXMultiviewPerViewAttributes extends java.lang.Object
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 extensionsSPV_NVX_multiview_per_view_attributes
andGL_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 thatgl_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.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; }
- 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
- Jeff Bolz jeffbolznv
- Last Modified Date
- 2017-01-13
- IP Status
- No known IP claims.
- Interactions and External Dependencies
- This extension requires the
SPV_NVX_multiview_per_view_attributes
SPIR-V extension. - This extension requires the
GL_NVX_multiview_per_view_attributes
extension for GLSL source languages. - This extension interacts with
VK_NV_viewport_array2
.
- This extension requires the
- Contributors
- Jeff Bolz, NVIDIA
- Daniel Koch, NVIDIA
-
-
Field Summary
Fields Modifier and Type Field Description static java.lang.String
VK_NVX_MULTIVIEW_PER_VIEW_ATTRIBUTES_EXTENSION_NAME
The extension name.static int
VK_NVX_MULTIVIEW_PER_VIEW_ATTRIBUTES_SPEC_VERSION
The extension specification version.static int
VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTIVIEW_PER_VIEW_ATTRIBUTES_PROPERTIES_NVX
ExtendsVkStructureType
.static int
VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX
VK_SUBPASS_DESCRIPTION_PER_VIEW_POSITION_X_ONLY_BIT_NVXExtendsVkSubpassDescriptionFlagBits
.
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-
-
Field Detail
-
VK_NVX_MULTIVIEW_PER_VIEW_ATTRIBUTES_SPEC_VERSION
The extension specification version.
-
VK_NVX_MULTIVIEW_PER_VIEW_ATTRIBUTES_EXTENSION_NAME
The extension name.
-
VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTIVIEW_PER_VIEW_ATTRIBUTES_PROPERTIES_NVX
ExtendsVkStructureType
.
-
VK_SUBPASS_DESCRIPTION_PER_VIEW_ATTRIBUTES_BIT_NVX, VK_SUBPASS_DESCRIPTION_PER_VIEW_POSITION_X_ONLY_BIT_NVX
ExtendsVkSubpassDescriptionFlagBits
.Enum values:
-
-