/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
  * ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  * for the specific language governing rights and limitations under the
  * License.
  *
  * The Original Code is Mozilla Corporation code.
  *
  * The Initial Developer of the Original Code is Mozilla Foundation.
  * Portions created by the Initial Developer are Copyright (C) 2011
  * the Initial Developer. All Rights Reserved.
  *
  * Contributor(s):
  *   Bas Schouten <bschouten@mozilla.com>
  *
  * Alternatively, the contents of this file may be used under the terms of
  * either the GNU General Public License Version 2 or later (the "GPL"), or
  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  * in which case the provisions of the GPL or the LGPL are applicable instead
  * of those above. If you wish to allow use of your version of this file only
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  * use your version of this file under the terms of the MPL, indicate your
  * decision by deleting the provisions above and replace them with the notice
  * and other provisions required by the GPL or the LGPL. If you do not delete
  * the provisions above, a recipient may use your version of this file under
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
     
#ifndef MOZILLA_GFX_SOURCESURFACEDUAL_H_
#define MOZILLA_GFX_SOURCESURFACEDUAL_H_
     
#include "2D.h"
     
namespace mozilla {
namespace gfx {

class DualSurface;
class DualPattern;

class SourceSurfaceDual : public SourceSurface
{
public:
  SourceSurfaceDual(DrawTarget *aDTA, DrawTarget *aDTB)
    : mA(aDTA->Snapshot())
    , mB(aDTB->Snapshot())
  { }

  virtual SurfaceType GetType() const { return SURFACE_DUAL_DT; }
  virtual IntSize GetSize() const { return mA->GetSize(); }
  virtual SurfaceFormat GetFormat() const { return mA->GetFormat(); }

  /* Readback from this surface type is not supported! */
  virtual TemporaryRef<DataSourceSurface> GetDataSurface() { return NULL; }
private:
  friend class DualSurface;
  friend class DualPattern;

  RefPtr<SourceSurface> mA;
  RefPtr<SourceSurface> mB;
};

}
}

#endif /* MOZILLA_GFX_SOURCESURFACEDUAL_H_ */
