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3 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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31 #include "PlatformString.h"
32 #include <wtf/Assertions.h>
33 #include <wtf/RefCounted.h>
40 class GraphicsContext;
41 class HTMLCanvasElement;
43 class CanvasStyle : public RefCounted<CanvasStyle> {
45 static PassRefPtr<CanvasStyle> createFromRGBA(RGBA32 rgba) { return adoptRef(new CanvasStyle(rgba)); }
46 static PassRefPtr<CanvasStyle> createFromString(const String& color, Document* = 0);
47 static PassRefPtr<CanvasStyle> createFromStringWithOverrideAlpha(const String& color, float alpha);
48 static PassRefPtr<CanvasStyle> createFromGrayLevelWithAlpha(float grayLevel, float alpha) { return adoptRef(new CanvasStyle(grayLevel, alpha)); }
49 static PassRefPtr<CanvasStyle> createFromRGBAChannels(float r, float g, float b, float a) { return adoptRef(new CanvasStyle(r, g, b, a)); }
50 static PassRefPtr<CanvasStyle> createFromCMYKAChannels(float c, float m, float y, float k, float a) { return adoptRef(new CanvasStyle(c, m, y, k, a)); }
51 static PassRefPtr<CanvasStyle> createFromGradient(PassRefPtr<CanvasGradient>);
52 static PassRefPtr<CanvasStyle> createFromPattern(PassRefPtr<CanvasPattern>);
54 bool isCurrentColor() const { return m_type == CurrentColor || m_type == CurrentColorWithOverrideAlpha; }
55 bool hasOverrideAlpha() const { return m_type == CurrentColorWithOverrideAlpha; }
56 float overrideAlpha() const { ASSERT(m_type == CurrentColorWithOverrideAlpha); return m_overrideAlpha; }
58 String color() const { ASSERT(m_type == RGBA || m_type == CMYKA); return Color(m_rgba).serialized(); }
59 CanvasGradient* canvasGradient() const { return m_gradient.get(); }
60 CanvasPattern* canvasPattern() const { return m_pattern.get(); }
62 void applyFillColor(GraphicsContext*);
63 void applyStrokeColor(GraphicsContext*);
65 bool isEquivalentColor(const CanvasStyle&) const;
66 bool isEquivalentRGBA(float r, float g, float b, float a) const;
67 bool isEquivalentCMYKA(float c, float m, float y, float k, float a) const;
70 enum Type { RGBA, CMYKA, Gradient, ImagePattern, CurrentColor, CurrentColorWithOverrideAlpha };
72 CanvasStyle(Type, float overrideAlpha = 0);
73 CanvasStyle(RGBA32 rgba);
74 CanvasStyle(float grayLevel, float alpha);
75 CanvasStyle(float r, float g, float b, float a);
76 CanvasStyle(float c, float m, float y, float k, float a);
77 CanvasStyle(PassRefPtr<CanvasGradient>);
78 CanvasStyle(PassRefPtr<CanvasPattern>);
84 float m_overrideAlpha;
87 RefPtr<CanvasGradient> m_gradient;
88 RefPtr<CanvasPattern> m_pattern;
92 CMYKAValues(float cyan, float magenta, float yellow, float black, float alpha) : c(cyan), m(magenta), y(yellow), k(black), a(alpha) {}
101 RGBA32 currentColor(HTMLCanvasElement*);
102 bool parseColorOrCurrentColor(RGBA32& parsedColor, const String& colorString, HTMLCanvasElement*);
104 } // namespace WebCore