chromium/third_party/skia/src/shaders/SkGainmapShader.cpp

/*
 * Copyright 2023 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "include/private/SkGainmapShader.h"

#include "include/core/SkColor.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorSpace.h"
#include "include/core/SkImage.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkShader.h"
#include "include/core/SkString.h"
#include "include/effects/SkRuntimeEffect.h"
#include "include/private/SkGainmapInfo.h"
#include "include/private/base/SkAssert.h"
#include "src/core/SkColorFilterPriv.h"
#include "src/core/SkImageInfoPriv.h"

#include <cmath>
#include <cstdint>

static constexpr char gGainmapSKSL[] = …;

static sk_sp<SkRuntimeEffect> gainmap_apply_effect() { … }

static bool all_channels_equal(const SkColor4f& c) { … }

sk_sp<SkShader> SkGainmapShader::Make(const sk_sp<const SkImage>& baseImage,
                                      const SkRect& baseRect,
                                      const SkSamplingOptions& baseSamplingOptions,
                                      const sk_sp<const SkImage>& gainmapImage,
                                      const SkRect& gainmapRect,
                                      const SkSamplingOptions& gainmapSamplingOptions,
                                      const SkGainmapInfo& gainmapInfo,
                                      const SkRect& dstRect,
                                      float dstHdrRatio,
                                      sk_sp<SkColorSpace> dstColorSpace) { … }