WebCore/GeneratedImage.h

   1 /*
   2  * Copyright (C) 2008 Apple Computer, Inc.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef GeneratedImage_h
  27 #define GeneratedImage_h
  28
  29 #include "Image.h"
  30
  31 #include "Generator.h"
  32 #include "IntSize.h"
  33 #include <wtf/RefPtr.h>
  34
  35 namespace WebCore {
  36
  37 class GeneratedImage : public Image {
  38 public:
  39     static PassRefPtr<GeneratedImage> create(PassRefPtr<Generator> generator, const IntSize& size)
  40     {
  41         return adoptRef(new GeneratedImage(generator, size));
  42     }
  43     virtual ~GeneratedImage() {}
  44
  45     virtual bool hasSingleSecurityOrigin() const { return true; }
  46
  47     // These are only used for SVGGeneratedImage right now
  48     virtual void setContainerSize(const IntSize& size) { m_size = size; }
  49     virtual bool usesContainerSize() const { return true; }
  50     virtual bool hasRelativeWidth() const { return true; }
  51     virtual bool hasRelativeHeight() const { return true; }
  52
  53     virtual IntSize size() const { return m_size; }
  54
  55     // Assume that generated content has no decoded data we need to worry about
  56     virtual void destroyDecodedData(bool /*destroyAll*/ = true) { }
  57     virtual unsigned decodedSize() const { return 0; }
  58
  59 protected:
  60     virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator);
  61     virtual void drawPattern(GraphicsContext*, const FloatRect& srcRect, const TransformationMatrix& patternTransform,
  62                              const FloatPoint& phase, CompositeOperator, const FloatRect& destRect);
  63
  64     GeneratedImage(PassRefPtr<Generator> generator, const IntSize& size)
  65         : m_generator(generator)
  66         , m_size(size)
  67     {
  68     }
  69
  70     RefPtr<Generator> m_generator;
  71     IntSize m_size;
  72 };
  73
  74 }
  75
  76 #endif