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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
107 lines
4.9 KiB
C++
107 lines
4.9 KiB
C++
/*
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* Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_HTML_CANVAS_CANVASSTYLE_H_
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#define SKY_ENGINE_CORE_HTML_CANVAS_CANVASSTYLE_H_
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#include "sky/engine/platform/graphics/Color.h"
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#include "sky/engine/platform/heap/Handle.h"
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#include "sky/engine/wtf/Assertions.h"
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#include "sky/engine/wtf/RefCounted.h"
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#include "sky/engine/wtf/text/WTFString.h"
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namespace blink {
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class CanvasGradient;
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class CanvasPattern;
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class GraphicsContext;
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class HTMLCanvasElement;
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class CanvasStyle final : public RefCounted<CanvasStyle> {
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public:
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static PassRefPtr<CanvasStyle> createFromRGBA(RGBA32 rgba) { return adoptRef(new CanvasStyle(rgba)); }
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static PassRefPtr<CanvasStyle> createFromString(const String& color);
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static PassRefPtr<CanvasStyle> createFromStringWithOverrideAlpha(const String& color, float alpha);
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static PassRefPtr<CanvasStyle> createFromGrayLevelWithAlpha(float grayLevel, float alpha) { return adoptRef(new CanvasStyle(grayLevel, alpha)); }
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static PassRefPtr<CanvasStyle> createFromRGBAChannels(float r, float g, float b, float a) { return adoptRef(new CanvasStyle(r, g, b, a)); }
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static PassRefPtr<CanvasStyle> createFromCMYKAChannels(float c, float m, float y, float k, float a) { return adoptRef(new CanvasStyle(c, m, y, k, a)); }
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static PassRefPtr<CanvasStyle> createFromGradient(PassRefPtr<CanvasGradient>);
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static PassRefPtr<CanvasStyle> createFromPattern(PassRefPtr<CanvasPattern>);
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bool isCurrentColor() const { return m_type == CurrentColor || m_type == CurrentColorWithOverrideAlpha; }
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bool hasOverrideAlpha() const { return m_type == CurrentColorWithOverrideAlpha; }
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float overrideAlpha() const { ASSERT(m_type == CurrentColorWithOverrideAlpha); return m_overrideAlpha; }
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String color() const { ASSERT(m_type == RGBA || m_type == CMYKA); return Color(m_rgba).serialized(); }
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CanvasGradient* canvasGradient() const { return m_gradient.get(); }
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CanvasPattern* canvasPattern() const { return m_pattern.get(); }
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void applyFillColor(GraphicsContext*);
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void applyStrokeColor(GraphicsContext*);
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bool isEquivalentColor(const CanvasStyle&) const;
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bool isEquivalentRGBA(float r, float g, float b, float a) const;
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bool isEquivalentCMYKA(float c, float m, float y, float k, float a) const;
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private:
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enum Type { RGBA, CMYKA, Gradient, ImagePattern, CurrentColor, CurrentColorWithOverrideAlpha };
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CanvasStyle(Type, float overrideAlpha = 0);
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CanvasStyle(RGBA32 rgba);
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CanvasStyle(float grayLevel, float alpha);
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CanvasStyle(float r, float g, float b, float a);
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CanvasStyle(float c, float m, float y, float k, float a);
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CanvasStyle(PassRefPtr<CanvasGradient>);
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CanvasStyle(PassRefPtr<CanvasPattern>);
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Type m_type;
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union {
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RGBA32 m_rgba;
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float m_overrideAlpha;
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};
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RefPtr<CanvasGradient> m_gradient;
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RefPtr<CanvasPattern> m_pattern;
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struct CMYKAValues {
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CMYKAValues() : c(0), m(0), y(0), k(0), a(0) { }
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CMYKAValues(float cyan, float magenta, float yellow, float black, float alpha) : c(cyan), m(magenta), y(yellow), k(black), a(alpha) { }
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float c;
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float m;
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float y;
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float k;
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float a;
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} m_cmyka;
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};
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RGBA32 currentColor(HTMLCanvasElement*);
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bool parseColorOrCurrentColor(RGBA32& parsedColor, const String& colorString, HTMLCanvasElement*);
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} // namespace blink
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#endif // SKY_ENGINE_CORE_HTML_CANVAS_CANVASSTYLE_H_
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