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Registered Extension Number

131

Revision

2

Extension and Version Dependencies

Deprecation state

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 Enum Constants

  • VK_EXT_SAMPLER_FILTER_MINMAX_EXTENSION_NAME

  • VK_EXT_SAMPLER_FILTER_MINMAX_SPEC_VERSION

  • Extending VkFormatFeatureFlagBits:

    • VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_MINMAX_BIT_EXT

  • Extending VkSamplerReductionMode:

    • VK_SAMPLER_REDUCTION_MODE_MAX_EXT

    • VK_SAMPLER_REDUCTION_MODE_MIN_EXT

    • VK_SAMPLER_REDUCTION_MODE_WEIGHTED_AVERAGE_EXT

  • Extending VkStructureType:

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SAMPLER_FILTER_MINMAX_PROPERTIES_EXT

    • VK_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

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.

Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.