1 /* 2 * Copyright (C) 2003, 2004, 2005, 2006, 2010 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef Color_h 27 #define Color_h 28 29 #include <wtf/FastAllocBase.h> 30 #include <wtf/Forward.h> 31 #include <wtf/unicode/Unicode.h> 32 33 #if USE(CG) 34 #include "ColorSpace.h" 35 typedef struct CGColor* CGColorRef; 36 #endif 37 38 #if PLATFORM(QT) 39 #include <qglobal.h> 40 QT_BEGIN_NAMESPACE 41 class QColor; 42 QT_END_NAMESPACE 43 #endif 44 45 #if PLATFORM(GTK) 46 typedef struct _GdkColor GdkColor; 47 #ifndef GTK_API_VERSION_2 48 typedef struct _GdkRGBA GdkRGBA; 49 #endif 50 #endif 51 52 #if PLATFORM(WX) 53 class wxColour; 54 #endif 55 56 #if PLATFORM(HAIKU) 57 struct rgb_color; 58 #endif 59 60 namespace WebCore { 61 62 class Color; 63 64 typedef unsigned RGBA32; // RGBA quadruplet 65 66 RGBA32 makeRGB(int r, int g, int b); 67 RGBA32 makeRGBA(int r, int g, int b, int a); 68 69 RGBA32 colorWithOverrideAlpha(RGBA32 color, float overrideAlpha); 70 RGBA32 makeRGBA32FromFloats(float r, float g, float b, float a); 71 RGBA32 makeRGBAFromHSLA(double h, double s, double l, double a); 72 RGBA32 makeRGBAFromCMYKA(float c, float m, float y, float k, float a); 73 74 int differenceSquared(const Color&, const Color&); 75 76 inline int redChannel(RGBA32 color) { return (color >> 16) & 0xFF; } 77 inline int greenChannel(RGBA32 color) { return (color >> 8) & 0xFF; } 78 inline int blueChannel(RGBA32 color) { return color & 0xFF; } 79 inline int alphaChannel(RGBA32 color) { return (color >> 24) & 0xFF; } 80 81 class Color { 82 WTF_MAKE_FAST_ALLOCATED; 83 public: 84 Color() : m_color(0), m_valid(false) { } 85 Color(RGBA32 col) : m_color(col), m_valid(true) { } 86 Color(int r, int g, int b) : m_color(makeRGB(r, g, b)), m_valid(true) { } 87 Color(int r, int g, int b, int a) : m_color(makeRGBA(r, g, b, a)), m_valid(true) { } 88 // Color is currently limited to 32bit RGBA, perhaps some day we'll support better colors 89 Color(float r, float g, float b, float a) : m_color(makeRGBA32FromFloats(r, g, b, a)), m_valid(true) { } 90 // Creates a new color from the specific CMYK and alpha values. 91 Color(float c, float m, float y, float k, float a) : m_color(makeRGBAFromCMYKA(c, m, y, k, a)), m_valid(true) { } 92 explicit Color(const String&); 93 explicit Color(const char*); 94 95 // Returns the color serialized according to HTML5 96 // - http://www.whatwg.org/specs/web-apps/current-work/#serialization-of-a-color 97 String serialized() const; 98 99 // Returns the color serialized as either #RRGGBB or #RRGGBBAA 100 // The latter format is not a valid CSS color, and should only be seen in DRT dumps. 101 String nameForRenderTreeAsText() const; 102 103 void setNamedColor(const String&); 104 105 bool isValid() const { return m_valid; } 106 107 bool hasAlpha() const { return alpha() < 255; } 108 109 int red() const { return redChannel(m_color); } 110 int green() const { return greenChannel(m_color); } 111 int blue() const { return blueChannel(m_color); } 112 int alpha() const { return alphaChannel(m_color); } 113 114 RGBA32 rgb() const { return m_color; } // Preserve the alpha. 115 void setRGB(int r, int g, int b) { m_color = makeRGB(r, g, b); m_valid = true; } 116 void setRGB(RGBA32 rgb) { m_color = rgb; m_valid = true; } 117 void getRGBA(float& r, float& g, float& b, float& a) const; 118 void getRGBA(double& r, double& g, double& b, double& a) const; 119 void getHSL(double& h, double& s, double& l) const; 120 121 Color light() const; 122 Color dark() const; 123 124 Color blend(const Color&) const; 125 Color blendWithWhite() const; 126 127 #if PLATFORM(QT) 128 Color(const QColor&); 129 operator QColor() const; 130 #endif 131 132 #if PLATFORM(GTK) 133 Color(const GdkColor&); 134 // We can't sensibly go back to GdkColor without losing the alpha value 135 #ifndef GTK_API_VERSION_2 136 Color(const GdkRGBA&); 137 operator GdkRGBA() const; 138 #endif 139 #endif 140 141 #if PLATFORM(WX) 142 Color(const wxColour&); 143 operator wxColour() const; 144 #endif 145 146 #if USE(CG) 147 Color(CGColorRef); 148 #endif 149 150 #if PLATFORM(HAIKU) 151 Color(const rgb_color&); 152 operator rgb_color() const; 153 #endif 154 155 static bool parseHexColor(const String& name, RGBA32& rgb); 156 static bool parseHexColor(const UChar* name, unsigned length, RGBA32& rgb); 157 158 static const RGBA32 black = 0xFF000000; 159 static const RGBA32 white = 0xFFFFFFFF; 160 static const RGBA32 darkGray = 0xFF808080; 161 static const RGBA32 gray = 0xFFA0A0A0; 162 static const RGBA32 lightGray = 0xFFC0C0C0; 163 static const RGBA32 transparent = 0x00000000; 164 165 #ifdef ANDROID_CSS_TAP_HIGHLIGHT_COLOR 166 static const RGBA32 tap = 0x6633B5E5; 167 #endif 168 169 private: 170 RGBA32 m_color; 171 bool m_valid; 172 }; 173 174 inline bool operator==(const Color& a, const Color& b) 175 { 176 return a.rgb() == b.rgb() && a.isValid() == b.isValid(); 177 } 178 179 inline bool operator!=(const Color& a, const Color& b) 180 { 181 return !(a == b); 182 } 183 184 Color colorFromPremultipliedARGB(unsigned); 185 unsigned premultipliedARGBFromColor(const Color&); 186 187 #if USE(CG) 188 CGColorRef cachedCGColor(const Color&, ColorSpace); 189 #endif 190 191 } // namespace WebCore 192 193 #endif // Color_h 194
