| /* |
| * Copyright (C) 2003, 2004, 2005, 2006, 2010 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 COMPUTER, INC. ``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 COMPUTER, INC. OR |
| * 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. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_COLOR_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_COLOR_H_ |
| |
| #include "third_party/blink/renderer/platform/platform_export.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/forward.h" |
| #include "third_party/blink/renderer/platform/wtf/text/unicode.h" |
| |
| typedef uint32_t SkColor; |
| |
| namespace blink { |
| |
| class Color; |
| |
| typedef unsigned RGBA32; // RGBA quadruplet |
| |
| PLATFORM_EXPORT RGBA32 MakeRGB(int r, int g, int b); |
| PLATFORM_EXPORT RGBA32 MakeRGBA(int r, int g, int b, int a); |
| |
| PLATFORM_EXPORT RGBA32 MakeRGBA32FromFloats(float r, float g, float b, float a); |
| PLATFORM_EXPORT RGBA32 MakeRGBAFromHSLA(double h, double s, double l, double a); |
| PLATFORM_EXPORT RGBA32 |
| MakeRGBAFromCMYKA(float c, float m, float y, float k, float a); |
| |
| PLATFORM_EXPORT int DifferenceSquared(const Color&, const Color&); |
| |
| inline int RedChannel(RGBA32 color) { |
| return (color >> 16) & 0xFF; |
| } |
| inline int GreenChannel(RGBA32 color) { |
| return (color >> 8) & 0xFF; |
| } |
| inline int BlueChannel(RGBA32 color) { |
| return color & 0xFF; |
| } |
| inline int AlphaChannel(RGBA32 color) { |
| return (color >> 24) & 0xFF; |
| } |
| |
| struct NamedColor { |
| DISALLOW_NEW(); |
| const char* name; |
| unsigned argb_value; |
| }; |
| |
| PLATFORM_EXPORT const NamedColor* FindColor(const char* str, unsigned len); |
| |
| class PLATFORM_EXPORT Color { |
| DISALLOW_NEW(); |
| |
| public: |
| constexpr Color() : color_(Color::kTransparent) {} |
| constexpr Color(RGBA32 color) : color_(color) {} |
| Color(int r, int g, int b) : color_(MakeRGB(r, g, b)) {} |
| Color(int r, int g, int b, int a) : color_(MakeRGBA(r, g, b, a)) {} |
| // Color is currently limited to 32bit RGBA. Perhaps some day we'll support |
| // better colors. |
| Color(float r, float g, float b, float a) |
| : color_(MakeRGBA32FromFloats(r, g, b, a)) {} |
| // Creates a new color from the specific CMYK and alpha values. |
| Color(float c, float m, float y, float k, float a) |
| : color_(MakeRGBAFromCMYKA(c, m, y, k, a)) {} |
| |
| static constexpr Color CreateUnchecked(int r, int g, int b) { |
| RGBA32 color = 0xFF000000 | r << 16 | g << 8 | b; |
| return Color(color); |
| } |
| static constexpr Color CreateUnchecked(int r, int g, int b, int a) { |
| RGBA32 color = a << 24 | r << 16 | g << 8 | b; |
| return Color(color); |
| } |
| |
| // Returns the color serialized according to HTML5: |
| // http://www.whatwg.org/specs/web-apps/current-work/#serialization-of-a-color |
| String Serialized() const; |
| |
| // Returns the color serialized as either #RRGGBB or #RRGGBBAA. The latter |
| // format is not a valid CSS color, and should only be seen in DRT dumps. |
| String NameForLayoutTreeAsText() const; |
| |
| // Returns whether parsing succeeded. The resulting Color is arbitrary |
| // if parsing fails. |
| bool SetFromString(const String&); |
| bool SetNamedColor(const String&); |
| |
| bool HasAlpha() const { return Alpha() < 255; } |
| |
| int Red() const { return RedChannel(color_); } |
| int Green() const { return GreenChannel(color_); } |
| int Blue() const { return BlueChannel(color_); } |
| int Alpha() const { return AlphaChannel(color_); } |
| |
| RGBA32 Rgb() const { return color_; } // Preserve the alpha. |
| void SetRGB(int r, int g, int b) { color_ = MakeRGB(r, g, b); } |
| void SetRGB(RGBA32 rgb) { color_ = rgb; } |
| void GetRGBA(float& r, float& g, float& b, float& a) const; |
| void GetRGBA(double& r, double& g, double& b, double& a) const; |
| void GetHSL(double& h, double& s, double& l) const; |
| |
| explicit operator SkColor() const; |
| |
| Color Light() const; |
| Color Dark() const; |
| |
| Color CombineWithAlpha(float other_alpha) const; |
| |
| // This is an implementation of Porter-Duff's "source-over" equation |
| Color Blend(const Color&) const; |
| Color BlendWithWhite() const; |
| |
| static bool ParseHexColor(const StringView&, RGBA32&); |
| static bool ParseHexColor(const LChar*, unsigned, RGBA32&); |
| static bool ParseHexColor(const UChar*, unsigned, RGBA32&); |
| |
| static const RGBA32 kBlack = 0xFF000000; |
| static const RGBA32 kWhite = 0xFFFFFFFF; |
| static const RGBA32 kDarkGray = 0xFF808080; |
| static const RGBA32 kGray = 0xFFA0A0A0; |
| static const RGBA32 kLightGray = 0xFFC0C0C0; |
| static const RGBA32 kTransparent = 0x00000000; |
| |
| private: |
| RGBA32 color_; |
| }; |
| |
| inline bool operator==(const Color& a, const Color& b) { |
| return a.Rgb() == b.Rgb(); |
| } |
| |
| inline bool operator!=(const Color& a, const Color& b) { |
| return !(a == b); |
| } |
| |
| PLATFORM_EXPORT Color ColorFromPremultipliedARGB(RGBA32); |
| PLATFORM_EXPORT RGBA32 PremultipliedARGBFromColor(const Color&); |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_COLOR_H_ |