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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_PALETTE_INTERPOLATION_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_PALETTE_INTERPOLATION_H_
#include <optional>
#include "third_party/blink/renderer/platform/fonts/font_palette.h"
#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/core/SkTypeface.h"
namespace blink {
class PLATFORM_EXPORT PaletteInterpolation {
public:
explicit PaletteInterpolation(sk_sp<SkTypeface> typeface)
: typeface_(typeface) {}
std::optional<uint16_t> RetrievePaletteIndex(
const FontPalette* palette) const;
Vector<FontPalette::FontPaletteOverride> ComputeInterpolableFontPalette(
const FontPalette* palette) const;
private:
Vector<FontPalette::FontPaletteOverride> RetrieveColorRecords(
const FontPalette* palette,
unsigned int palette_index) const;
static Vector<FontPalette::FontPaletteOverride> MixColorRecords(
Vector<FontPalette::FontPaletteOverride>&& start_color_records,
Vector<FontPalette::FontPaletteOverride>&& end_color_records,
double percentage,
double alpha_multiplier,
Color::ColorSpace color_interpolation_space,
std::optional<Color::HueInterpolationMethod> hue_interpolation_method);
sk_sp<SkTypeface> typeface_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_PALETTE_INTERPOLATION_H_
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