chromium/third_party/skia/include/core/SkSamplingOptions.h

/*
 * Copyright 2020 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkImageSampling_DEFINED
#define SkImageSampling_DEFINED

#include "include/core/SkTypes.h"

#include <algorithm>
#include <new>

enum class SkFilterMode { … };
static constexpr int kSkFilterModeCount = …;

enum class SkMipmapMode { … };
static constexpr int kSkMipmapModeCount = …;

/*
 *  Specify B and C (each between 0...1) to create a shader that applies the corresponding
 *  cubic reconstruction filter to the image.
 *
 *  Example values:
 *      B = 1/3, C = 1/3        "Mitchell" filter
 *      B = 0,   C = 1/2        "Catmull-Rom" filter
 *
 *  See "Reconstruction Filters in Computer Graphics"
 *          Don P. Mitchell
 *          Arun N. Netravali
 *          1988
 *  https://www.cs.utexas.edu/~fussell/courses/cs384g-fall2013/lectures/mitchell/Mitchell.pdf
 *
 *  Desmos worksheet https://www.desmos.com/calculator/aghdpicrvr
 *  Nice overview https://entropymine.com/imageworsener/bicubic/
 */
struct SkCubicResampler { … };

struct SK_API SkSamplingOptions { … };

#endif