| /* |
| * Copyright (C) 2006, 2008 Apple Inc. All rights reserved. |
| * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef CanvasStyle_h |
| #define CanvasStyle_h |
| |
| #include "Color.h" |
| #include "PlatformString.h" |
| #include <wtf/Assertions.h> |
| |
| namespace WebCore { |
| |
| class CanvasGradient; |
| class CanvasPattern; |
| class Document; |
| class GraphicsContext; |
| class HTMLCanvasElement; |
| |
| class CanvasStyle : public RefCounted<CanvasStyle> { |
| public: |
| static PassRefPtr<CanvasStyle> createFromRGBA(RGBA32 rgba) { return adoptRef(new CanvasStyle(rgba)); } |
| static PassRefPtr<CanvasStyle> createFromString(const String& color, Document* = 0); |
| static PassRefPtr<CanvasStyle> createFromStringWithOverrideAlpha(const String& color, float alpha); |
| static PassRefPtr<CanvasStyle> createFromGrayLevelWithAlpha(float grayLevel, float alpha) { return adoptRef(new CanvasStyle(grayLevel, alpha)); } |
| static PassRefPtr<CanvasStyle> createFromRGBAChannels(float r, float g, float b, float a) { return adoptRef(new CanvasStyle(r, g, b, a)); } |
| static PassRefPtr<CanvasStyle> createFromCMYKAChannels(float c, float m, float y, float k, float a) { return adoptRef(new CanvasStyle(c, m, y, k, a)); } |
| static PassRefPtr<CanvasStyle> createFromGradient(PassRefPtr<CanvasGradient>); |
| static PassRefPtr<CanvasStyle> createFromPattern(PassRefPtr<CanvasPattern>); |
| |
| bool isCurrentColor() const { return m_type == CurrentColor || m_type == CurrentColorWithOverrideAlpha; } |
| bool hasOverrideAlpha() const { return m_type == CurrentColorWithOverrideAlpha; } |
| float overrideAlpha() const { ASSERT(m_type == CurrentColorWithOverrideAlpha); return m_overrideAlpha; } |
| |
| String color() const { ASSERT(m_type == RGBA || m_type == CMYKA); return Color(m_rgba).serialized(); } |
| CanvasGradient* canvasGradient() const { return m_gradient.get(); } |
| CanvasPattern* canvasPattern() const { return m_pattern.get(); } |
| |
| void applyFillColor(GraphicsContext*); |
| void applyStrokeColor(GraphicsContext*); |
| |
| bool isEquivalentColor(const CanvasStyle&) const; |
| bool isEquivalentRGBA(float r, float g, float b, float a) const; |
| bool isEquivalentCMYKA(float c, float m, float y, float k, float a) const; |
| |
| private: |
| enum Type { RGBA, CMYKA, Gradient, ImagePattern, CurrentColor, CurrentColorWithOverrideAlpha }; |
| |
| CanvasStyle(Type, float overrideAlpha = 0); |
| CanvasStyle(RGBA32 rgba); |
| CanvasStyle(float grayLevel, float alpha); |
| CanvasStyle(float r, float g, float b, float a); |
| CanvasStyle(float c, float m, float y, float k, float a); |
| CanvasStyle(PassRefPtr<CanvasGradient>); |
| CanvasStyle(PassRefPtr<CanvasPattern>); |
| |
| Type m_type; |
| |
| union { |
| RGBA32 m_rgba; |
| float m_overrideAlpha; |
| }; |
| |
| RefPtr<CanvasGradient> m_gradient; |
| RefPtr<CanvasPattern> m_pattern; |
| |
| struct CMYKAValues { |
| CMYKAValues() {} |
| CMYKAValues(float cyan, float magenta, float yellow, float black, float alpha) : c(cyan), m(magenta), y(yellow), k(black), a(alpha) {} |
| float c; |
| float m; |
| float y; |
| float k; |
| float a; |
| } m_cmyka; |
| }; |
| |
| RGBA32 currentColor(HTMLCanvasElement*); |
| bool parseColorOrCurrentColor(RGBA32& parsedColor, const String& colorString, HTMLCanvasElement*); |
| |
| } // namespace WebCore |
| |
| #endif |