VK_NV_scissor_exclusive
Other Extension Metadata
Last Modified Date
2023-01-18
IP Status
No known IP claims.
Interactions and External Dependencies
None
Contributors
- Pat Brown, NVIDIA
- Jeff Bolz, NVIDIA
- Piers Daniell, NVIDIA
- Daniel Koch, NVIDIA
Description
This extension adds support for an exclusive scissor test to Vulkan. The exclusive scissor test behaves like the scissor test, except that the exclusive scissor test fails for pixels inside the corresponding rectangle and passes for pixels outside the rectangle. If the same rectangle is used for both the scissor and exclusive scissor tests, the exclusive scissor test will pass if and only if the scissor test fails.
Version 2 of this extension introduces
VK_DYNAMIC_STATE_EXCLUSIVE_SCISSOR_ENABLE_NV
and
vkCmdSetExclusiveScissorEnableNV.
Applications that use this dynamic state must ensure the implementation
advertises at least specVersion
2
of this extension.
New Commands
New Structures
- Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
- Extending VkPipelineViewportStateCreateInfo:
New Enum Constants
VK_NV_SCISSOR_EXCLUSIVE_EXTENSION_NAME
VK_NV_SCISSOR_EXCLUSIVE_SPEC_VERSION
- Extending VkDynamicState:
VK_DYNAMIC_STATE_EXCLUSIVE_SCISSOR_ENABLE_NV
VK_DYNAMIC_STATE_EXCLUSIVE_SCISSOR_NV
- Extending VkStructureType:
VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXCLUSIVE_SCISSOR_FEATURES_NV
VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_EXCLUSIVE_SCISSOR_STATE_CREATE_INFO_NV
Issues
1) For the scissor test, the viewport state must be created with a matching number of scissor and viewport rectangles. Should we have the same requirement for exclusive scissors?
RESOLVED: For exclusive scissors, we relax this requirement and allow an exclusive scissor rectangle count that is either zero or equal to the number of viewport rectangles. If you pass in an exclusive scissor count of zero, the exclusive scissor test is treated as disabled.
Version History
- Revision 2, 2023-01-18 (Piers Daniell)
- Add dynamic state for explicit exclusive scissor enables
- Revision 1, 2018-07-31 (Pat Brown)
- Internal revisions