Deprecation State
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Promoted to Vulkan 1.4
Contact
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Piers Daniell [GitHub]pdaniell-nv
Other Extension Metadata
- Last Modified Date
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2023-06-08
- IP Status
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No known IP claims.
- Contributors
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Jeff Bolz, NVIDIA
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Allen Jensen, NVIDIA
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Faith Ekstrand, Intel
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Description
This extension adds some line rasterization features that are commonly used in CAD applications and supported in other APIs like OpenGL. Bresenham-style line rasterization is supported, smooth rectangular lines (coverage to alpha) are supported, and stippled lines are supported for all three line rasterization modes.
New Enum Constants
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VK_KHR_LINE_RASTERIZATION_EXTENSION_NAME
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VK_KHR_LINE_RASTERIZATION_SPEC_VERSION
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Extending VkDynamicState:
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VK_DYNAMIC_STATE_LINE_STIPPLE_KHR
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Extending VkLineRasterizationMode:
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VK_LINE_RASTERIZATION_MODE_BRESENHAM_KHR
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VK_LINE_RASTERIZATION_MODE_DEFAULT_KHR
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VK_LINE_RASTERIZATION_MODE_RECTANGULAR_KHR
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VK_LINE_RASTERIZATION_MODE_RECTANGULAR_SMOOTH_KHR
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Extending VkStructureType:
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_LINE_RASTERIZATION_FEATURES_KHR
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_LINE_RASTERIZATION_PROPERTIES_KHR
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VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_LINE_STATE_CREATE_INFO_KHR
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Promotion to Vulkan 1.4
Functionality in this extension is included in core Vulkan 1.4 with the KHR suffix omitted. The original type, enum and command names are still available as aliases of the core functionality.
When Version 1.4 is supported, the
bresenhamLines
feature must be supported.
Issues
1) Do we need to support Bresenham-style and smooth lines with more than one rasterization sample? i.e. the equivalent of glDisable(GL_MULTISAMPLE) in OpenGL when the framebuffer has more than one sample?
RESOLVED: Yes. For simplicity, Bresenham line rasterization carries forward a few restrictions from OpenGL, such as not supporting per-sample shading, alpha to coverage, or alpha to one.
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.