chromium/third_party/material_color_utilities/src/cpp/quantize/wsmeans.cc

/*
 * Copyright 2022 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "cpp/quantize/wsmeans.h"

#include <algorithm>
#include <cmath>
#include <cstdint>
#include <cstdlib>
#include <map>
#include <set>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#include "absl/container/flat_hash_map.h"
#include "cpp/quantize/lab.h"

constexpr int kMaxIterations = …;
constexpr double kMinDeltaE = …;

namespace material_color_utilities {

struct Swatch { … };

struct DistanceToIndex { … };

QuantizerResult QuantizeWsmeans(const std::vector<Argb>& input_pixels,
                                const std::vector<Argb>& starting_clusters,
                                uint16_t max_colors) { … }

}  // namespace material_color_utilities