Name

VK_EXT_sampler_filter_minmax - device extension

VK_EXT_sampler_filter_minmax

Name String

VK_EXT_sampler_filter_minmax

Extension Type

Device extension

Registered Extension Number

131

Revision

2

Extension and Version Dependencies

• Requires Vulkan 1.0
• Requires VK_KHR_get_physical_device_properties2

Deprecation state

• Promoted to Vulkan 1.2

Contact

• Jeff Bolz https://github.com/KhronosGroup/Vulkan-Docs/issues/new?title=VK_EXT_sampler_filter_minmax:%20&body=@jeffbolznv%20

Other Extension Metadata

Last Modified Date

2017-05-19

Interactions and External Dependencies

• Promoted to Vulkan 1.2 Core

IP Status

No known IP claims.

Contributors

• Jeff Bolz, NVIDIA
• Piers Daniell, NVIDIA

Description

In unextended Vulkan, minification and magnification filters such as LINEAR allow sampled image lookups to return a filtered texel value produced by computing a weighted average of a collection of texels in the neighborhood of the texture coordinate provided.

This extension provides a new sampler parameter which allows applications to produce a filtered texel value by computing a component-wise minimum (MIN) or maximum (MAX) of the texels that would normally be averaged. The reduction mode is orthogonal to the minification and magnification filter parameters. The filter parameters are used to identify the set of texels used to produce a final filtered value; the reduction mode identifies how these texels are combined.

Promotion to Vulkan 1.2

All functionality in this extension is included in core Vulkan 1.2, with the EXT suffix omitted. The original type, enum and command names are still available as aliases of the core functionality.

New Structures

• Extending PhysicalDeviceProperties2:

  • PhysicalDeviceSamplerFilterMinmaxPropertiesEXT

• Extending SamplerCreateInfo:

  • SamplerReductionModeCreateInfoEXT

New Enums

• SamplerReductionModeEXT

New Enum Constants

• EXT_SAMPLER_FILTER_MINMAX_EXTENSION_NAME

• EXT_SAMPLER_FILTER_MINMAX_SPEC_VERSION

• Extending FormatFeatureFlagBits:

  • FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_MINMAX_BIT_EXT

• Extending SamplerReductionMode:

  • SAMPLER_REDUCTION_MODE_MAX_EXT
  • SAMPLER_REDUCTION_MODE_MIN_EXT
  • SAMPLER_REDUCTION_MODE_WEIGHTED_AVERAGE_EXT

• Extending StructureType:

  • STRUCTURE_TYPE_PHYSICAL_DEVICE_SAMPLER_FILTER_MINMAX_PROPERTIES_EXT
  • STRUCTURE_TYPE_SAMPLER_REDUCTION_MODE_CREATE_INFO_EXT

Version History

• Revision 2, 2017-05-19 (Piers Daniell)

  • Renamed to EXT

• Revision 1, 2017-03-25 (Jeff Bolz)

  • Internal revisions

See Also

PhysicalDeviceSamplerFilterMinmaxPropertiesEXT, SamplerReductionModeCreateInfoEXT, SamplerReductionModeEXT

Document Notes

For more information, see the Vulkan Specification

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