2 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
3 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include "platform/graphics/Color.h"
31 #include "platform/heap/Handle.h"
32 #include "wtf/Assertions.h"
33 #include "wtf/RefCounted.h"
34 #include "wtf/text/WTFString.h"
40 class GraphicsContext;
41 class HTMLCanvasElement;
43 class CanvasStyle final : public RefCountedWillBeGarbageCollected<CanvasStyle> {
45 static PassRefPtrWillBeRawPtr<CanvasStyle> createFromRGBA(RGBA32 rgba) { return adoptRefWillBeNoop(new CanvasStyle(rgba)); }
46 static PassRefPtrWillBeRawPtr<CanvasStyle> createFromString(const String& color);
47 static PassRefPtrWillBeRawPtr<CanvasStyle> createFromStringWithOverrideAlpha(const String& color, float alpha);
48 static PassRefPtrWillBeRawPtr<CanvasStyle> createFromGrayLevelWithAlpha(float grayLevel, float alpha) { return adoptRefWillBeNoop(new CanvasStyle(grayLevel, alpha)); }
49 static PassRefPtrWillBeRawPtr<CanvasStyle> createFromRGBAChannels(float r, float g, float b, float a) { return adoptRefWillBeNoop(new CanvasStyle(r, g, b, a)); }
50 static PassRefPtrWillBeRawPtr<CanvasStyle> createFromCMYKAChannels(float c, float m, float y, float k, float a) { return adoptRefWillBeNoop(new CanvasStyle(c, m, y, k, a)); }
51 static PassRefPtrWillBeRawPtr<CanvasStyle> createFromGradient(PassRefPtrWillBeRawPtr<CanvasGradient>);
52 static PassRefPtrWillBeRawPtr<CanvasStyle> createFromPattern(PassRefPtrWillBeRawPtr<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;
72 enum Type { RGBA, CMYKA, Gradient, ImagePattern, CurrentColor, CurrentColorWithOverrideAlpha };
74 CanvasStyle(Type, float overrideAlpha = 0);
75 CanvasStyle(RGBA32 rgba);
76 CanvasStyle(float grayLevel, float alpha);
77 CanvasStyle(float r, float g, float b, float a);
78 CanvasStyle(float c, float m, float y, float k, float a);
79 CanvasStyle(PassRefPtrWillBeRawPtr<CanvasGradient>);
80 CanvasStyle(PassRefPtrWillBeRawPtr<CanvasPattern>);
86 float m_overrideAlpha;
89 RefPtrWillBeMember<CanvasGradient> m_gradient;
90 RefPtrWillBeMember<CanvasPattern> m_pattern;
93 CMYKAValues() : c(0), m(0), y(0), k(0), a(0) { }
94 CMYKAValues(float cyan, float magenta, float yellow, float black, float alpha) : c(cyan), m(magenta), y(yellow), k(black), a(alpha) { }
103 RGBA32 currentColor(HTMLCanvasElement*);
104 bool parseColorOrCurrentColor(RGBA32& parsedColor, const String& colorString, HTMLCanvasElement*);