| /* |
| * 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 INC. 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 INC. 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 <array> |
| #include <limits> |
| |
| namespace WebCore { |
| |
| template<typename> struct AlphaTraits; |
| template<typename> struct ColorComponentInfo; |
| template<typename> struct ExtendedRGBModel; |
| template<typename> struct HSLModel; |
| template<typename> struct HWBModel; |
| template<typename> struct LCHModel; |
| template<typename> struct LabModel; |
| template<typename> struct RGBModel; |
| template<typename> struct XYZModel; |
| |
| |
| template<> struct AlphaTraits<float> { |
| static constexpr float transparent = 0.0f; |
| static constexpr float opaque = 1.0f; |
| }; |
| |
| template<> struct AlphaTraits<uint8_t> { |
| static constexpr uint8_t transparent = 0; |
| static constexpr uint8_t opaque = 255; |
| }; |
| |
| enum class ColorComponentType { |
| Angle, |
| Number, |
| Percentage |
| }; |
| |
| template<typename T> struct ColorComponentInfo { |
| T min; |
| T max; |
| ColorComponentType type; |
| }; |
| |
| template<> struct ExtendedRGBModel<float> { |
| static constexpr std::array<ColorComponentInfo<float>, 3> componentInfo { { |
| { -std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), ColorComponentType::Number }, |
| { -std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), ColorComponentType::Number }, |
| { -std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), ColorComponentType::Number } |
| } }; |
| static constexpr bool isInvertible = false; |
| }; |
| |
| template<typename ColorType> inline constexpr bool UsesExtendedRGBModel = std::is_same_v<typename ColorType::Model, ExtendedRGBModel<typename ColorType::ComponentType>>; |
| |
| template<> struct HSLModel<float> { |
| static constexpr std::array<ColorComponentInfo<float>, 3> componentInfo { { |
| { 0, 360, ColorComponentType::Angle }, |
| { 0, 100, ColorComponentType::Percentage }, |
| { 0, 100, ColorComponentType::Percentage } |
| } }; |
| static constexpr bool isInvertible = false; |
| }; |
| |
| template<typename ColorType> inline constexpr bool UsesHSLModel = std::is_same_v<typename ColorType::Model, HSLModel<typename ColorType::ComponentType>>; |
| |
| template<> struct HWBModel<float> { |
| static constexpr std::array<ColorComponentInfo<float>, 3> componentInfo { { |
| { 0, 360, ColorComponentType::Angle }, |
| { 0, 100, ColorComponentType::Percentage }, |
| { 0, 100, ColorComponentType::Percentage } |
| } }; |
| static constexpr bool isInvertible = false; |
| }; |
| |
| template<typename ColorType> inline constexpr bool UsesHWBModel = std::is_same_v<typename ColorType::Model, HWBModel<typename ColorType::ComponentType>>; |
| |
| template<> struct LabModel<float> { |
| static constexpr std::array<ColorComponentInfo<float>, 3> componentInfo { { |
| { 0, std::numeric_limits<float>::infinity(), ColorComponentType::Number }, |
| { -std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), ColorComponentType::Number }, |
| { -std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), ColorComponentType::Number } |
| } }; |
| static constexpr bool isInvertible = false; |
| }; |
| |
| template<typename ColorType> inline constexpr bool UsesLabModel = std::is_same_v<typename ColorType::Model, LabModel<typename ColorType::ComponentType>>; |
| |
| template<> struct LCHModel<float> { |
| static constexpr std::array<ColorComponentInfo<float>, 3> componentInfo { { |
| { 0, std::numeric_limits<float>::infinity(), ColorComponentType::Number }, |
| { 0, std::numeric_limits<float>::infinity(), ColorComponentType::Number }, |
| { 0, 360, ColorComponentType::Angle } |
| } }; |
| static constexpr bool isInvertible = false; |
| }; |
| |
| template<typename ColorType> inline constexpr bool UsesLCHModel = std::is_same_v<typename ColorType::Model, LCHModel<typename ColorType::ComponentType>>; |
| |
| template<> struct RGBModel<float> { |
| static constexpr std::array<ColorComponentInfo<float>, 3> componentInfo { { |
| { 0, 1, ColorComponentType::Number }, |
| { 0, 1, ColorComponentType::Number }, |
| { 0, 1, ColorComponentType::Number } |
| } }; |
| static constexpr bool isInvertible = true; |
| }; |
| |
| template<> struct RGBModel<uint8_t> { |
| static constexpr std::array<ColorComponentInfo<uint8_t>, 3> componentInfo { { |
| { 0, 255, ColorComponentType::Number }, |
| { 0, 255, ColorComponentType::Number }, |
| { 0, 255, ColorComponentType::Number } |
| } }; |
| static constexpr bool isInvertible = true; |
| }; |
| |
| template<typename ColorType> inline constexpr bool UsesRGBModel = std::is_same_v<typename ColorType::Model, RGBModel<typename ColorType::ComponentType>>; |
| |
| template<> struct XYZModel<float> { |
| static constexpr std::array<ColorComponentInfo<float>, 3> componentInfo { { |
| { -std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), ColorComponentType::Number }, |
| { -std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), ColorComponentType::Number }, |
| { -std::numeric_limits<float>::infinity(), std::numeric_limits<float>::infinity(), ColorComponentType::Number } |
| } }; |
| static constexpr bool isInvertible = false; |
| }; |
| |
| template<typename ColorType> inline constexpr bool UsesXYZModel = std::is_same_v<typename ColorType::Model, XYZModel<typename ColorType::ComponentType>>; |
| |
| } |