graphicstypes.h

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
 *
 * 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 GraphicsTypes_h
#define GraphicsTypes_h

namespace WebCore {

    class String;

    // Note: These constants exactly match the NSCompositeOperator constants of
    // AppKit on Mac OS X Tiger. If these ever change, we'll need to change the
    // Mac OS X Tiger platform code to map one to the other.
    enum CompositeOperator {
        CompositeClear,
        CompositeCopy,
        CompositeSourceOver,
        CompositeSourceIn,
        CompositeSourceOut,
        CompositeSourceAtop,
        CompositeDestinationOver,
        CompositeDestinationIn,
        CompositeDestinationOut,
        CompositeDestinationAtop,
        CompositeXOR,
        CompositePlusDarker,
        CompositeHighlight,
        CompositePlusLighter
    };

    // FIXME: Currently these constants have to match the values used in the SVG
    // DOM API. That's a mistake. We need to make cut that dependency.
    enum GradientSpreadMethod {
        SpreadMethodPad = 1,
        SpreadMethodReflect = 2,
        SpreadMethodRepeat = 3
    };

    enum LineCap { ButtCap, RoundCap, SquareCap };

    enum LineJoin { MiterJoin, RoundJoin, BevelJoin };

    enum HorizontalAlignment { AlignLeft, AlignRight, AlignHCenter };

    enum TextBaseline { AlphabeticTextBaseline, TopTextBaseline, MiddleTextBaseline, BottomTextBaseline, IdeographicTextBaseline, HangingTextBaseline };
    
    enum TextAlign { StartTextAlign, EndTextAlign, LeftTextAlign, CenterTextAlign, RightTextAlign };

    String compositeOperatorName(CompositeOperator);
    bool parseCompositeOperator(const String&, CompositeOperator&);

    String lineCapName(LineCap);
    bool parseLineCap(const String&, LineCap&);

    String lineJoinName(LineJoin);
    bool parseLineJoin(const String&, LineJoin&);

    String textAlignName(TextAlign);
    bool parseTextAlign(const String&, TextAlign&);
    
    String textBaselineName(TextBaseline);
    bool parseTextBaseline(const String&, TextBaseline&);

} // namespace WebCore

#endif