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// Copyright 2023 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0
include::{generated}/meta/{refprefix}VK_QCOM_filter_cubic_weights.adoc[]
=== Other Extension Metadata
*Last Modified Date*::
2023-06-23
*Contributors*::
- Jeff Leger, Qualcomm Technologies, Inc.
- Jonathan Wicks, Qualcomm Technologies, Inc.
=== Description
This extension extends cubic filtering by adding the ability to select a set
of weights.
Without this extension, the weights used in cubic filtering are limited to
those corresponding to a Catmull-Rom spline.
This extension adds support for 3 additional spline weights.
This extension adds a new structure that can: be added to the pname:pNext
chain of slink:VkSamplerCreateInfo that can: be used to specify which set of
cubic weights are used in cubic filtering.
A similar structure can be added to the pname:pNext chain of
slink:VkBlitImageInfo2 to specify cubic weights used in a blit operation.
With this extension weights corresponding to the following additional
splines can be selected for cubic filtered sampling and blits:
* Zero Tangent Cardinal
* B-Spline
* Mitchell-Netravali
include::{generated}/interfaces/VK_QCOM_filter_cubic_weights.adoc[]
=== Version History
* Revision 1, 2023-06-23 (jleger)
** Initial version
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