text: /*
   * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
   * Copyright (C) 2014 Igalia S.L.
   *
   * 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 BitmapTexture_h
  #define BitmapTexture_h
  
  #include "IntPoint.h"
  #include "IntRect.h"
  #include "IntSize.h"
  #include <wtf/RefCounted.h>
  #include <wtf/RefPtr.h>
  
  namespace WebCore {
  
  class FilterOperations;
  class GraphicsLayer;
  class Image;
  class TextureMapper;
  
  // A 2D texture that can be the target of software or GL rendering.
  class BitmapTexture : public RefCounted<BitmapTexture> {
  public:
      enum Flag {
          NoFlag = 0,
          SupportsAlpha = 0x01,
          FBOAttachment = 0x02
      };
  
      enum UpdateContentsFlag {
          UpdateCanModifyOriginalImageData,
          UpdateCannotModifyOriginalImageData
      };
  
      typedef unsigned Flags;
  
      BitmapTexture()
          : m_flags(0)
      {
      }
  
      virtual ~BitmapTexture() = default;
      virtual bool isBackedByOpenGL() const { return false; }
  
      virtual IntSize size() const = 0;
      virtual void updateContents(Image*, const IntRect&, const IntPoint& offset, UpdateContentsFlag) = 0;
      virtual void updateContents(TextureMapper&, GraphicsLayer*, const IntRect& target, const IntPoint& offset, UpdateContentsFlag, float scale = 1);
      virtual void updateContents(const void*, const IntRect& target, const IntPoint& offset, int bytesPerLine, UpdateContentsFlag) = 0;
      virtual bool isValid() const = 0;
      inline Flags flags() const { return m_flags; }
  
      virtual int bpp() const { return 32; }
      void reset(const IntSize& size, Flags flags = 0)
      {
          m_flags = flags;
          m_contentSize = size;
          didReset();
      }
      virtual void didReset() { }
  
      inline IntSize contentSize() const { return m_contentSize; }
      inline int numberOfBytes() const { return size().width() * size().height() * bpp() >> 3; }
      inline bool isOpaque() const { return !(m_flags & SupportsAlpha); }
  
      virtual RefPtr<BitmapTexture> applyFilters(TextureMapper&, const FilterOperations&) { return this; }
  
  protected:
      IntSize m_contentSize;
  
  private:
      Flags m_flags;
  };
  
  }
  
  #endif // BitmapTexture_h
  