pattern.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) 2006, 2007, 2008 Apple Computer, Inc.  All rights reserved.
 * Copyright (C) 2008 Eric Seidel <[e-mail]>
 *
 * 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 Pattern_h
#define Pattern_h

#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include "TransformationMatrix.h"

#if PLATFORM(CG)
typedef struct CGPattern* CGPatternRef;
typedef CGPatternRef PlatformPatternPtr;
#elif PLATFORM(CAIRO)
#include <cairo.h>
typedef cairo_pattern_t* PlatformPatternPtr;
#elif PLATFORM(SKIA)
class SkShader;
typedef SkShader* PlatformPatternPtr;
#elif PLATFORM(QT)
#include <QBrush>
typedef QBrush PlatformPatternPtr;
#elif PLATFORM(WX)
#if USE(WXGC)
class wxGraphicsBrush;
typedef wxGraphicsBrush* PlatformPatternPtr;
#else
class wxBrush;
typedef wxBrush* PlatformPatternPtr;
#endif // USE(WXGC)
#endif

namespace WebCore {
    class TransformationMatrix;
    class Image;

    class Pattern : public RefCounted<Pattern> {
    public:
        static PassRefPtr<Pattern> create(Image* tileImage, bool repeatX, bool repeatY)
        {
            return adoptRef(new Pattern(tileImage, repeatX, repeatY));
        }
        virtual ~Pattern();

        Image* tileImage() const { return m_tileImage.get(); }

        // Pattern space is an abstract space that maps to the default user space by the transformation 'userSpaceTransformation' 
        PlatformPatternPtr createPlatformPattern(const TransformationMatrix& userSpaceTransformation) const;
        void setPatternSpaceTransform(const TransformationMatrix& patternSpaceTransformation) { m_patternSpaceTransformation = patternSpaceTransformation; }

    private:
        Pattern(Image*, bool repeatX, bool repeatY);

        RefPtr<Image> m_tileImage;
        bool m_repeatX;
        bool m_repeatY;
        TransformationMatrix m_patternSpaceTransformation;
    };

} //namespace

#endif