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29 #include "AnimationUtilities.h"
30 #include <wtf/FastAllocBase.h>
31 #include <wtf/Forward.h>
32 #include <wtf/unicode/Unicode.h>
35 #include "ColorSpace.h"
36 typedef struct CGColor* CGColorRef;
47 typedef struct _GdkColor GdkColor;
48 #ifndef GTK_API_VERSION_2
49 typedef struct _GdkRGBA GdkRGBA;
61 typedef unsigned RGBA32; // RGBA quadruplet
63 RGBA32 makeRGB(int r, int g, int b);
64 RGBA32 makeRGBA(int r, int g, int b, int a);
66 RGBA32 colorWithOverrideAlpha(RGBA32 color, float overrideAlpha);
67 RGBA32 makeRGBA32FromFloats(float r, float g, float b, float a);
68 RGBA32 makeRGBAFromHSLA(double h, double s, double l, double a);
69 RGBA32 makeRGBAFromCMYKA(float c, float m, float y, float k, float a);
71 int differenceSquared(const Color&, const Color&);
73 inline int redChannel(RGBA32 color) { return (color >> 16) & 0xFF; }
74 inline int greenChannel(RGBA32 color) { return (color >> 8) & 0xFF; }
75 inline int blueChannel(RGBA32 color) { return color & 0xFF; }
76 inline int alphaChannel(RGBA32 color) { return (color >> 24) & 0xFF; }
79 WTF_MAKE_FAST_ALLOCATED;
81 Color() : m_color(0), m_valid(false) { }
82 Color(RGBA32 color, bool valid = true) : m_color(color), m_valid(valid) { ASSERT(!m_color || m_valid); }
83 Color(int r, int g, int b) : m_color(makeRGB(r, g, b)), m_valid(true) { }
84 Color(int r, int g, int b, int a) : m_color(makeRGBA(r, g, b, a)), m_valid(true) { }
85 // Color is currently limited to 32bit RGBA, perhaps some day we'll support better colors
86 Color(float r, float g, float b, float a) : m_color(makeRGBA32FromFloats(r, g, b, a)), m_valid(true) { }
87 // Creates a new color from the specific CMYK and alpha values.
88 Color(float c, float m, float y, float k, float a) : m_color(makeRGBAFromCMYKA(c, m, y, k, a)), m_valid(true) { }
89 explicit Color(const String&);
90 explicit Color(const char*);
92 static Color createUnCheked(int r, int g, int b)
94 RGBA32 color = 0xFF000000 | r << 16 | g << 8 | b;
97 static Color createUnCheked(int r, int g, int b, int a)
99 RGBA32 color = a << 24 | r << 16 | g << 8 | b;
103 // Returns the color serialized according to HTML5
104 // - http://www.whatwg.org/specs/web-apps/current-work/#serialization-of-a-color
105 String serialized() const;
107 // Returns the color serialized as either #RRGGBB or #RRGGBBAA
108 // The latter format is not a valid CSS color, and should only be seen in DRT dumps.
109 String nameForRenderTreeAsText() const;
111 void setNamedColor(const String&);
113 bool isValid() const { return m_valid; }
115 bool hasAlpha() const { return alpha() < 255; }
117 int red() const { return redChannel(m_color); }
118 int green() const { return greenChannel(m_color); }
119 int blue() const { return blueChannel(m_color); }
120 int alpha() const { return alphaChannel(m_color); }
122 RGBA32 rgb() const { return m_color; } // Preserve the alpha.
123 void setRGB(int r, int g, int b) { m_color = makeRGB(r, g, b); m_valid = true; }
124 void setRGB(RGBA32 rgb) { m_color = rgb; m_valid = true; }
125 void getRGBA(float& r, float& g, float& b, float& a) const;
126 void getRGBA(double& r, double& g, double& b, double& a) const;
127 void getHSL(double& h, double& s, double& l) const;
132 // This is an implementation of Porter-Duff's "source-over" equation
133 Color blend(const Color&) const;
134 Color blendWithWhite() const;
137 Color(const QColor&);
138 operator QColor() const;
142 Color(const GdkColor&);
143 // We can't sensibly go back to GdkColor without losing the alpha value
144 #ifndef GTK_API_VERSION_2
145 Color(const GdkRGBA&);
146 operator GdkRGBA() const;
151 Color(const wxColour&);
152 operator wxColour() const;
159 static bool parseHexColor(const String& name, RGBA32& rgb);
160 static bool parseHexColor(const UChar* name, unsigned length, RGBA32& rgb);
162 static const RGBA32 black = 0xFF000000;
163 static const RGBA32 white = 0xFFFFFFFF;
164 static const RGBA32 darkGray = 0xFF808080;
165 static const RGBA32 gray = 0xFFA0A0A0;
166 static const RGBA32 lightGray = 0xFFC0C0C0;
167 static const RGBA32 transparent = 0x00000000;
174 inline bool operator==(const Color& a, const Color& b)
176 return a.rgb() == b.rgb() && a.isValid() == b.isValid();
179 inline bool operator!=(const Color& a, const Color& b)
184 Color colorFromPremultipliedARGB(unsigned);
185 #if ENABLE(TIZEN_CANVAS_CAIRO_GLES_RENDERING)
186 Color colorFromPremultipliedABGR(unsigned);
187 unsigned premultipliedABGRFromColor(const Color&);
189 unsigned premultipliedARGBFromColor(const Color&);
191 inline Color blend(const Color& from, const Color& to, double progress, bool blendPremultiplied = true)
193 // We need to preserve the state of the valid flag at the end of the animation
194 if (progress == 1 && !to.isValid())
197 if (blendPremultiplied) {
198 // Contrary to the name, RGBA32 actually stores ARGB, so we can initialize Color directly from premultipliedARGBFromColor().
199 // Also, premultipliedARGBFromColor() bails on zero alpha, so special-case that.
200 Color premultFrom = from.alpha() ? premultipliedARGBFromColor(from) : 0;
201 Color premultTo = to.alpha() ? premultipliedARGBFromColor(to) : 0;
203 Color premultBlended(blend(premultFrom.red(), premultTo.red(), progress),
204 blend(premultFrom.green(), premultTo.green(), progress),
205 blend(premultFrom.blue(), premultTo.blue(), progress),
206 blend(premultFrom.alpha(), premultTo.alpha(), progress));
208 return Color(colorFromPremultipliedARGB(premultBlended.rgb()));
211 return Color(blend(from.red(), to.red(), progress),
212 blend(from.green(), to.green(), progress),
213 blend(from.blue(), to.blue(), progress),
214 blend(from.alpha(), to.alpha(), progress));
218 CGColorRef cachedCGColor(const Color&, ColorSpace);
221 } // namespace WebCore