/**
 * Stone of Orthanc
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2019 Osimis S.A., Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#pragma once

#include "ICairoContextProvider.h"
#include "CompositorHelper.h"

namespace OrthancStone
{
  namespace Internals
  {
    class CairoBaseRenderer : public CompositorHelper::ILayerRenderer
    {
    private:
      ICairoContextProvider&      target_;
      std::auto_ptr<ISceneLayer>  layer_;

    protected:
      template<typename T>
      const T& GetLayer() const
      {
        return dynamic_cast<T&>(*layer_);
      }

      cairo_t* GetCairoContext() const
      {
        return target_.GetCairoContext();
      }
    
    public:
      CairoBaseRenderer(ICairoContextProvider& target,
                        const ISceneLayer& layer) :
        target_(target)
      {
        Update(layer);
      }

      virtual void Update(const ISceneLayer& layer)
      {
        layer_.reset(layer.Clone());
      }    
    };
  }
}