Vulkan.Extensions.VK_EXT_conservative_rasterization

primitiveOverestimationSize is the size in pixels the generating primitive is increased at each of its edges during conservative rasterization overestimation mode. Even with a size of 0.0, conservative rasterization overestimation rules still apply and if any part of the pixel rectangle is covered by the generating primitive, fragments are generated for the entire pixel. However implementations may make the pixel coverage area even more conservative by increasing the size of the generating primitive.

maxExtraPrimitiveOverestimationSize is the maximum size in pixels of extra overestimation the implementation supports in the pipeline state. A value of 0.0 means the implementation does not support any additional overestimation of the generating primitive during conservative rasterization. A value above 0.0 allows the application to further increase the size of the generating primitive during conservative rasterization overestimation.

extraPrimitiveOverestimationSizeGranularity is the granularity of extra overestimation that can be specified in the pipeline state between 0.0 and maxExtraPrimitiveOverestimationSize inclusive. A value of 0.0 means the implementation can use the smallest representable non-zero value in the screen space pixel fixed-point grid.

primitiveUnderestimation is TRUE if the implementation supports the CONSERVATIVE_RASTERIZATION_MODE_UNDERESTIMATE_EXT conservative rasterization mode in addition to CONSERVATIVE_RASTERIZATION_MODE_OVERESTIMATE_EXT. Otherwise the implementation only supports CONSERVATIVE_RASTERIZATION_MODE_OVERESTIMATE_EXT.

conservativePointAndLineRasterization is TRUE if the implementation supports conservative rasterization of point and line primitives as well as triangle primitives. Otherwise the implementation only supports triangle primitives.

degenerateTrianglesRasterized is FALSE if the implementation culls primitives generated from triangles that become zero area after they are quantized to the fixed-point rasterization pixel grid. degenerateTrianglesRasterized is TRUE if these primitives are not culled and the provoking vertex attributes and depth value are used for the fragments. The primitive area calculation is done on the primitive generated from the clipped triangle if applicable. Zero area primitives are backfacing and the application can enable backface culling if desired.

degenerateLinesRasterized is FALSE if the implementation culls lines that become zero length after they are quantized to the fixed-point rasterization pixel grid. degenerateLinesRasterized is TRUE if zero length lines are not culled and the provoking vertex attributes and depth value are used for the fragments.

fullyCoveredFragmentShaderInputVariable is TRUE if the implementation supports the SPIR-V builtin fragment shader input variable FullyCoveredEXT specifying that conservative rasterization is enabled and the fragment area is fully covered by the generating primitive.

conservativeRasterizationPostDepthCoverage is TRUE if the implementation supports conservative rasterization with the PostDepthCoverage execution mode enabled. Otherwise the PostDepthCoverage execution mode must not be used when conservative rasterization is enabled.

flags is reserved for future use.

flags must be 0

conservativeRasterizationMode is the conservative rasterization mode to use.

conservativeRasterizationMode must be a valid ConservativeRasterizationModeEXT value

extraPrimitiveOverestimationSize is the extra size in pixels to increase the generating primitive during conservative rasterization at each of its edges in X and Y equally in screen space beyond the base overestimation specified in PhysicalDeviceConservativeRasterizationPropertiesEXT::primitiveOverestimationSize. If conservativeRasterizationMode is not CONSERVATIVE_RASTERIZATION_MODE_OVERESTIMATE_EXT, this value is ignored.

extraPrimitiveOverestimationSize must be in the range of 0.0 to PhysicalDeviceConservativeRasterizationPropertiesEXT::maxExtraPrimitiveOverestimationSize inclusive