Class EXTConservativeRasterization
- java.lang.Object
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- org.lwjgl.vulkan.EXTConservativeRasterization
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public final class EXTConservativeRasterization extends java.lang.Object
This extension adds a new rasterization mode called conservative rasterization. There are two modes of conservative rasterization; overestimation and underestimation.When overestimation is enabled, if any part of the primitive, including its edges, covers any part of the rectangular pixel area, including its sides, then a fragment is generated with all coverage samples turned on. This extension allows for some variation in implementations by accounting for differences in overestimation, where the generating primitive size is increased at each of its edges by some sub-pixel amount to further increase conservative pixel coverage. Implementations can allow the application to specify an extra overestimation beyond the base overestimation the implementation already does. It also allows implementations to either cull degenerate primitives or rasterize them.
When underestimation is enabled, fragments are only generated if the rectangular pixel area is fully covered by the generating primitive. If supported by the implementation, when a pixel rectangle is fully covered the fragment shader input variable builtin called FullyCoveredEXT is set to true. The shader variable works in either overestimation or underestimation mode.
Implementations can process degenerate triangles and lines by either discarding them or generating conservative fragments for them. Degenerate triangles are those that end up with zero area after the rasterizer quantizes them to the fixed-point pixel grid. Degenerate lines are those with zero length after quantization.
- Name String
VK_EXT_conservative_rasterization
- Extension Type
- Device extension
- Registered Extension Number
- 102
- Revision
- 1
- Extension and Version Dependencies
- Requires Vulkan 1.0
- Requires
VK_KHR_get_physical_device_properties2
- Contact
- Piers Daniell pdaniell-nv
- Last Modified Data
- 2017-08-28
- Contributors
- Daniel Koch, NVIDIA
- Daniel Rakos, AMD
- Jeff Bolz, NVIDIA
- Slawomir Grajewski, Intel
- Stu Smith, Imagination Technologies
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Field Summary
Fields Modifier and Type Field Description static int
VK_CONSERVATIVE_RASTERIZATION_MODE_DISABLED_EXT
VK_CONSERVATIVE_RASTERIZATION_MODE_OVERESTIMATE_EXT
VK_CONSERVATIVE_RASTERIZATION_MODE_UNDERESTIMATE_EXTVkConservativeRasterizationModeEXT - Specify the conservative rasterization modestatic java.lang.String
VK_EXT_CONSERVATIVE_RASTERIZATION_EXTENSION_NAME
The extension name.static int
VK_EXT_CONSERVATIVE_RASTERIZATION_SPEC_VERSION
The extension specification version.static int
VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CONSERVATIVE_RASTERIZATION_PROPERTIES_EXT
VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_CONSERVATIVE_STATE_CREATE_INFO_EXTExtendsVkStructureType
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Field Detail
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VK_EXT_CONSERVATIVE_RASTERIZATION_SPEC_VERSION
The extension specification version.
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VK_EXT_CONSERVATIVE_RASTERIZATION_EXTENSION_NAME
The extension name.
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CONSERVATIVE_RASTERIZATION_PROPERTIES_EXT, VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_CONSERVATIVE_STATE_CREATE_INFO_EXT
ExtendsVkStructureType
.Enum values:
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VK_CONSERVATIVE_RASTERIZATION_MODE_DISABLED_EXT, VK_CONSERVATIVE_RASTERIZATION_MODE_OVERESTIMATE_EXT, VK_CONSERVATIVE_RASTERIZATION_MODE_UNDERESTIMATE_EXT
VkConservativeRasterizationModeEXT - Specify the conservative rasterization modeDescription
CONSERVATIVE_RASTERIZATION_MODE_DISABLED_EXT
specifies that conservative rasterization is disabled and rasterization proceeds as normal.CONSERVATIVE_RASTERIZATION_MODE_OVERESTIMATE_EXT
specifies that conservative rasterization is enabled in overestimation mode.CONSERVATIVE_RASTERIZATION_MODE_UNDERESTIMATE_EXT
specifies that conservative rasterization is enabled in underestimation mode.
See Also
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