| /* |
| * Copyright (C) 2021 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include "AlphaPremultiplication.h" |
| #include "ColorTypes.h" |
| #include <optional> |
| #include <variant> |
| #include <wtf/EnumTraits.h> |
| #include <wtf/Hasher.h> |
| |
| namespace WebCore { |
| |
| enum class HueInterpolationMethod : uint8_t { |
| Shorter, |
| Longer, |
| Increasing, |
| Decreasing, |
| Specified |
| }; |
| |
| enum class ColorInterpolationColorSpace : uint8_t { |
| HSL, |
| HWB, |
| LCH, |
| Lab, |
| OKLCH, |
| OKLab, |
| SRGB, |
| SRGBLinear, |
| XYZD50, |
| XYZD65 |
| }; |
| |
| struct ColorInterpolationMethod { |
| struct HSL { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::HSL; |
| using ColorType = WebCore::HSLA<float>; |
| HueInterpolationMethod hueInterpolationMethod = HueInterpolationMethod::Shorter; |
| }; |
| struct HWB { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::HWB; |
| using ColorType = WebCore::HWBA<float>; |
| HueInterpolationMethod hueInterpolationMethod = HueInterpolationMethod::Shorter; |
| }; |
| struct LCH { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::LCH; |
| using ColorType = WebCore::LCHA<float>; |
| HueInterpolationMethod hueInterpolationMethod = HueInterpolationMethod::Shorter; |
| }; |
| struct Lab { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::Lab; |
| using ColorType = WebCore::Lab<float>; |
| }; |
| struct OKLCH { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::OKLCH; |
| using ColorType = WebCore::OKLCHA<float>; |
| HueInterpolationMethod hueInterpolationMethod = HueInterpolationMethod::Shorter; |
| }; |
| struct OKLab { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::OKLab; |
| using ColorType = WebCore::OKLab<float>; |
| }; |
| struct SRGB { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::SRGB; |
| using ColorType = WebCore::ExtendedSRGBA<float>; |
| }; |
| struct SRGBLinear { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::SRGBLinear; |
| using ColorType = WebCore::ExtendedLinearSRGBA<float>; |
| }; |
| struct XYZD50 { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::XYZD50; |
| using ColorType = WebCore::XYZA<float, WhitePoint::D50>; |
| }; |
| struct XYZD65 { |
| static constexpr auto interpolationColorSpace = ColorInterpolationColorSpace::XYZD65; |
| using ColorType = WebCore::XYZA<float, WhitePoint::D65>; |
| }; |
| |
| template<typename Encoder> void encode(Encoder&) const; |
| template<typename Decoder> static std::optional<ColorInterpolationMethod> decode(Decoder&); |
| |
| std::variant<HSL, HWB, LCH, Lab, OKLCH, OKLab, SRGB, SRGBLinear, XYZD50, XYZD65> colorSpace; |
| AlphaPremultiplication alphaPremultiplication; |
| }; |
| |
| template<typename Encoder> void ColorInterpolationMethod::encode(Encoder& encoder) const |
| { |
| encoder << alphaPremultiplication; |
| |
| WTF::switchOn(colorSpace, |
| [&] (auto& type) { |
| encoder << type.interpolationColorSpace; |
| if constexpr (std::remove_reference_t<decltype(type)>::ColorType::Model::coordinateSystem == ColorSpaceCoordinateSystem::CylindricalPolar) { |
| encoder << type.hueInterpolationMethod; |
| } |
| } |
| ); |
| } |
| |
| template<typename Decoder> std::optional<ColorInterpolationMethod> ColorInterpolationMethod::decode(Decoder& decoder) |
| { |
| std::optional<AlphaPremultiplication> alphaPremultiplication; |
| decoder >> alphaPremultiplication; |
| if (!alphaPremultiplication) |
| return std::nullopt; |
| |
| std::optional<ColorInterpolationColorSpace> interpolationColorSpace; |
| decoder >> interpolationColorSpace; |
| if (!interpolationColorSpace) |
| return std::nullopt; |
| |
| switch (*interpolationColorSpace) { |
| case ColorInterpolationColorSpace::HSL: { |
| std::optional<HueInterpolationMethod> hueInterpolationMethod; |
| decoder >> hueInterpolationMethod; |
| if (!hueInterpolationMethod) |
| return std::nullopt; |
| |
| return ColorInterpolationMethod { ColorInterpolationMethod::HSL { *hueInterpolationMethod }, *alphaPremultiplication }; |
| } |
| case ColorInterpolationColorSpace::HWB: { |
| std::optional<HueInterpolationMethod> hueInterpolationMethod; |
| decoder >> hueInterpolationMethod; |
| if (!hueInterpolationMethod) |
| return std::nullopt; |
| |
| return ColorInterpolationMethod { ColorInterpolationMethod::HWB { *hueInterpolationMethod }, *alphaPremultiplication }; |
| } |
| case ColorInterpolationColorSpace::LCH: { |
| std::optional<HueInterpolationMethod> hueInterpolationMethod; |
| decoder >> hueInterpolationMethod; |
| if (!hueInterpolationMethod) |
| return std::nullopt; |
| |
| return ColorInterpolationMethod { ColorInterpolationMethod::LCH { *hueInterpolationMethod }, *alphaPremultiplication }; |
| } |
| case ColorInterpolationColorSpace::OKLCH: { |
| std::optional<HueInterpolationMethod> hueInterpolationMethod; |
| decoder >> hueInterpolationMethod; |
| if (!hueInterpolationMethod) |
| return std::nullopt; |
| |
| return ColorInterpolationMethod { ColorInterpolationMethod::OKLCH { *hueInterpolationMethod }, *alphaPremultiplication }; |
| } |
| case ColorInterpolationColorSpace::Lab: |
| return ColorInterpolationMethod { ColorInterpolationMethod::Lab { }, *alphaPremultiplication }; |
| case ColorInterpolationColorSpace::OKLab: |
| return ColorInterpolationMethod { ColorInterpolationMethod::OKLab { }, *alphaPremultiplication }; |
| case ColorInterpolationColorSpace::SRGB: |
| return ColorInterpolationMethod { ColorInterpolationMethod::SRGB { }, *alphaPremultiplication }; |
| case ColorInterpolationColorSpace::SRGBLinear: |
| return ColorInterpolationMethod { ColorInterpolationMethod::SRGBLinear { }, *alphaPremultiplication }; |
| case ColorInterpolationColorSpace::XYZD50: |
| return ColorInterpolationMethod { ColorInterpolationMethod::XYZD50 { }, *alphaPremultiplication }; |
| case ColorInterpolationColorSpace::XYZD65: |
| return ColorInterpolationMethod { ColorInterpolationMethod::XYZD65 { }, *alphaPremultiplication }; |
| } |
| |
| RELEASE_ASSERT_NOT_REACHED(); |
| return std::nullopt; |
| } |
| |
| inline void add(Hasher& hasher, const ColorInterpolationMethod& colorInterpolationMethod) |
| { |
| add(hasher, colorInterpolationMethod.alphaPremultiplication); |
| WTF::switchOn(colorInterpolationMethod.colorSpace, |
| [&] (auto& type) { |
| add(hasher, type.interpolationColorSpace); |
| if constexpr (std::remove_reference_t<decltype(type)>::ColorType::Model::coordinateSystem == ColorSpaceCoordinateSystem::CylindricalPolar) { |
| add(hasher, type.hueInterpolationMethod); |
| } |
| } |
| ); |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::HSL& a, const ColorInterpolationMethod::HSL& b) |
| { |
| return a.hueInterpolationMethod == b.hueInterpolationMethod; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::HWB& a, const ColorInterpolationMethod::HWB& b) |
| { |
| return a.hueInterpolationMethod == b.hueInterpolationMethod; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::LCH& a, const ColorInterpolationMethod::LCH& b) |
| { |
| return a.hueInterpolationMethod == b.hueInterpolationMethod; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::OKLCH& a, const ColorInterpolationMethod::OKLCH& b) |
| { |
| return a.hueInterpolationMethod == b.hueInterpolationMethod; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::Lab&, const ColorInterpolationMethod::Lab&) |
| { |
| return true; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::OKLab&, const ColorInterpolationMethod::OKLab&) |
| { |
| return true; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::SRGB&, const ColorInterpolationMethod::SRGB&) |
| { |
| return true; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::SRGBLinear&, const ColorInterpolationMethod::SRGBLinear&) |
| { |
| return true; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::XYZD50&, const ColorInterpolationMethod::XYZD50&) |
| { |
| return true; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod::XYZD65&, const ColorInterpolationMethod::XYZD65&) |
| { |
| return true; |
| } |
| |
| inline constexpr bool operator==(const ColorInterpolationMethod& a, const ColorInterpolationMethod& b) |
| { |
| return a.alphaPremultiplication == b.alphaPremultiplication && a.colorSpace == b.colorSpace; |
| } |
| |
| } |
| |
| namespace WTF { |
| |
| template<> struct EnumTraits<WebCore::HueInterpolationMethod> { |
| using values = EnumValues< |
| WebCore::HueInterpolationMethod, |
| WebCore::HueInterpolationMethod::Shorter, |
| WebCore::HueInterpolationMethod::Longer, |
| WebCore::HueInterpolationMethod::Increasing, |
| WebCore::HueInterpolationMethod::Decreasing, |
| WebCore::HueInterpolationMethod::Specified |
| >; |
| }; |
| |
| template<> struct EnumTraits<WebCore::ColorInterpolationColorSpace> { |
| using values = EnumValues< |
| WebCore::ColorInterpolationColorSpace, |
| WebCore::ColorInterpolationColorSpace::HSL, |
| WebCore::ColorInterpolationColorSpace::HWB, |
| WebCore::ColorInterpolationColorSpace::LCH, |
| WebCore::ColorInterpolationColorSpace::Lab, |
| WebCore::ColorInterpolationColorSpace::OKLCH, |
| WebCore::ColorInterpolationColorSpace::OKLab, |
| WebCore::ColorInterpolationColorSpace::SRGB, |
| WebCore::ColorInterpolationColorSpace::SRGBLinear, |
| WebCore::ColorInterpolationColorSpace::XYZD50, |
| WebCore::ColorInterpolationColorSpace::XYZD65 |
| >; |
| }; |
| |
| } |