displayer.hpp

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/*
  DISPLAYER.hpp  -  base class for displaying video

  Copyright (C)         Lumiera.org
    2000,               Arne Schirmacher <arne@schirmacher.de>
    2001-2007,          Dan Dennedy <dan@dennedy.org>
    2008,               Joel Holdsworth <joel@airwebreathe.org.uk>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 2 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef STAGE_OUTPUT_DISPLAYER_H
#define STAGE_OUTPUT_DISPLAYER_H


namespace stage {
namespace output {
  
  enum DisplayerInput {
      DISPLAY_NONE,
      DISPLAY_YUV,
      DISPLAY_RGB,
      DISPLAY_BGR,
      DISPLAY_BGR0,
      DISPLAY_RGB16
    };
  
  
  class Displayer
    {
    protected:
      int imageWidth;
      int imageHeight;
      
    public:
      virtual ~Displayer() { }
      
      
      virtual bool usable();
      
      virtual DisplayerInput format();
      
      virtual int preferredWidth();
      
      virtual int preferredHeight();
      
      virtual void put (void* const)  =0;
      
      
    protected:
      static void calculateVideoLayout(
          int widget_width, int widget_height,
          int image_width, int image_height,
          int &video_x, int &video_y, int &video_width, int &video_height );
    };
    
    
  
}} // namespace stage::output
#endif /*STAGE_OUTPUT_DISPLAYER_H*/