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| 1 /* | |
| 2 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved. | |
| 3 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions | |
| 7 * are met: | |
| 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. | |
| 13 * | |
| 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 | |
| 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 25 */ | |
| 26 | |
| 27 #ifndef SKY_ENGINE_CORE_HTML_CANVAS_CANVASSTYLE_H_ | |
| 28 #define SKY_ENGINE_CORE_HTML_CANVAS_CANVASSTYLE_H_ | |
| 29 | |
| 30 #include "sky/engine/platform/graphics/Color.h" | |
| 31 #include "sky/engine/platform/heap/Handle.h" | |
| 32 #include "sky/engine/wtf/Assertions.h" | |
| 33 #include "sky/engine/wtf/RefCounted.h" | |
| 34 #include "sky/engine/wtf/text/WTFString.h" | |
| 35 | |
| 36 namespace blink { | |
| 37 | |
| 38 class CanvasGradient; | |
| 39 class CanvasPattern; | |
| 40 class GraphicsContext; | |
| 41 class HTMLCanvasElement; | |
| 42 | |
| 43 class CanvasStyle final : public RefCounted<CanvasStyle> { | |
| 44 public: | |
| 45 static PassRefPtr<CanvasStyle> createFromRGBA(RGBA32 rgba) { return adop
tRef(new CanvasStyle(rgba)); } | |
| 46 static PassRefPtr<CanvasStyle> createFromString(const String& color); | |
| 47 static PassRefPtr<CanvasStyle> createFromStringWithOverrideAlpha(const S
tring& color, float alpha); | |
| 48 static PassRefPtr<CanvasStyle> createFromGrayLevelWithAlpha(float grayLe
vel, 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<CanvasGradi
ent>); | |
| 52 static PassRefPtr<CanvasStyle> createFromPattern(PassRefPtr<CanvasPatter
n>); | |
| 53 | |
| 54 bool isCurrentColor() const { return m_type == CurrentColor || m_type ==
CurrentColorWithOverrideAlpha; } | |
| 55 bool hasOverrideAlpha() const { return m_type == CurrentColorWithOverrid
eAlpha; } | |
| 56 float overrideAlpha() const { ASSERT(m_type == CurrentColorWithOverrideA
lpha); return m_overrideAlpha; } | |
| 57 | |
| 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(); } | |
| 61 | |
| 62 void applyFillColor(GraphicsContext*); | |
| 63 void applyStrokeColor(GraphicsContext*); | |
| 64 | |
| 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) cons
t; | |
| 68 | |
| 69 private: | |
| 70 enum Type { RGBA, CMYKA, Gradient, ImagePattern, CurrentColor, CurrentCo
lorWithOverrideAlpha }; | |
| 71 | |
| 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>); | |
| 79 | |
| 80 Type m_type; | |
| 81 | |
| 82 union { | |
| 83 RGBA32 m_rgba; | |
| 84 float m_overrideAlpha; | |
| 85 }; | |
| 86 | |
| 87 RefPtr<CanvasGradient> m_gradient; | |
| 88 RefPtr<CanvasPattern> m_pattern; | |
| 89 | |
| 90 struct CMYKAValues { | |
| 91 CMYKAValues() : c(0), m(0), y(0), k(0), a(0) { } | |
| 92 CMYKAValues(float cyan, float magenta, float yellow, float black, fl
oat alpha) : c(cyan), m(magenta), y(yellow), k(black), a(alpha) { } | |
| 93 float c; | |
| 94 float m; | |
| 95 float y; | |
| 96 float k; | |
| 97 float a; | |
| 98 } m_cmyka; | |
| 99 }; | |
| 100 | |
| 101 RGBA32 currentColor(HTMLCanvasElement*); | |
| 102 bool parseColorOrCurrentColor(RGBA32& parsedColor, const String& colorString
, HTMLCanvasElement*); | |
| 103 | |
| 104 } // namespace blink | |
| 105 | |
| 106 #endif // SKY_ENGINE_CORE_HTML_CANVAS_CANVASSTYLE_H_ | |
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