gui/output/displayer.hpp

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/*
  displayer.hpp  -  Defines the 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 DISPLAYER_HPP
#define DISPLAYER_HPP

namespace gui {
namespace output {

#define MAX_WIDTH       720
#define MAX_HEIGHT      576

  typedef enum {
      DISPLAY_NONE,
      DISPLAY_YUV,
      DISPLAY_RGB,
      DISPLAY_BGR,
      DISPLAY_BGR0,
      DISPLAY_RGB16
  }
  DisplayerInput;

  class Displayer
  {
  public:

    virtual bool usable();

    virtual DisplayerInput format();

      virtual int preferredWidth();

      virtual int preferredHeight();

      virtual void put( void * ) = 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 );
  
  protected:
      int imageWidth;
      int imageHeight;
  };

}   // namespace output
}   // namespace gui

#endif // DISPLAYER_HPP

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