imgbuf.hh

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#ifndef __DW_IMGBUF_HH__
#define __DW_IMGBUF_HH__

#ifndef __INCLUDED_FROM_DW_CORE_HH__
#   error Do not include this file directly, use "core.hh" instead.
#endif

#include "../lout/debug.hh"

namespace dw {
namespace core {

class Imgbuf: public lout::object::Object, public lout::signal::ObservedObject
{
public:
   enum Type { RGB, RGBA, GRAY, INDEXED, INDEXED_ALPHA };

   inline Imgbuf () {
      DBG_OBJ_CREATE ("dw::core::Imgbuf");
      DBG_OBJ_BASECLASS (lout::object::Object);
      DBG_OBJ_BASECLASS (lout::signal::ObservedObject);
   }

   inline ~Imgbuf () {
      DBG_OBJ_DELETE ();
   }

   /*
    * Methods called from the image decoding
    */

   virtual void setCMap (int *colors, int num_colors) = 0;
   virtual void copyRow (int row, const byte *data) = 0;
   virtual void newScan () = 0;

   /*
    * Methods called from dw::Image
    */

   virtual Imgbuf* getScaledBuf (int width, int height) = 0;
   virtual void getRowArea (int row, dw::core::Rectangle *area) = 0;
   virtual int getRootWidth () = 0;
   virtual int getRootHeight () = 0;


   virtual Imgbuf *createSimilarBuf (int width, int height) = 0;

   virtual void copyTo (Imgbuf *dest, int xDestRoot, int yDestRoot,
                        int xSrc, int ySrc, int widthSrc, int heightSrc) = 0;

   /*
    * Reference counting.
    */

   virtual void ref () = 0;
   virtual void unref () = 0;

   virtual bool lastReference () = 0;


   virtual void setDeleteOnUnref (bool deleteOnUnref) = 0;

   virtual bool isReferred () = 0;
};

} // namespace core
} // namespace dw

#endif // __DW_IMGBUF_HH__