Contact
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Piers Daniell pdaniell-nv
Other Extension Metadata
- Last Modified Date
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2023-01-18
- Interactions and External Dependencies
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Interacts with
VK_KHR_device_group
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Interacts with Vulkan 1.1
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- Contributors
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Daniel Koch, NVIDIA
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Jeff Bolz, NVIDIA
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Description
This extension provides additional orthogonally aligned “discard rectangles” specified in framebuffer-space coordinates that restrict rasterization of all points, lines and triangles.
From zero to an implementation-dependent limit (specified by
maxDiscardRectangles
) number of discard rectangles can be operational
at once.
When one or more discard rectangles are active, rasterized fragments can
either survive if the fragment is within any of the operational discard
rectangles (VK_DISCARD_RECTANGLE_MODE_INCLUSIVE_EXT
mode) or be
rejected if the fragment is within any of the operational discard rectangles
(VK_DISCARD_RECTANGLE_MODE_EXCLUSIVE_EXT
mode).
These discard rectangles operate orthogonally to the existing scissor test functionality. The discard rectangles can be different for each physical device in a device group by specifying the device mask and setting discard rectangle dynamic state.
Version 2 of this extension introduces new dynamic states
VK_DYNAMIC_STATE_DISCARD_RECTANGLE_ENABLE_EXT
and
VK_DYNAMIC_STATE_DISCARD_RECTANGLE_MODE_EXT
, and the corresponding
functions vkCmdSetDiscardRectangleEnableEXT and
vkCmdSetDiscardRectangleModeEXT.
Applications that use these dynamic states must ensure the implementation
advertises at least specVersion
2
of this extension.
New Enum Constants
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VK_EXT_DISCARD_RECTANGLES_EXTENSION_NAME
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VK_EXT_DISCARD_RECTANGLES_SPEC_VERSION
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Extending VkDynamicState:
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VK_DYNAMIC_STATE_DISCARD_RECTANGLE_ENABLE_EXT
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VK_DYNAMIC_STATE_DISCARD_RECTANGLE_EXT
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VK_DYNAMIC_STATE_DISCARD_RECTANGLE_MODE_EXT
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Extending VkStructureType:
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DISCARD_RECTANGLE_PROPERTIES_EXT
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VK_STRUCTURE_TYPE_PIPELINE_DISCARD_RECTANGLE_STATE_CREATE_INFO_EXT
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Version History
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Revision 2, 2023-01-18 (Piers Daniell)
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Add dynamic states for discard rectangle enable/disable and mode.
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Revision 1, 2016-12-22 (Piers Daniell)
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Internal revisions
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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.