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 /*

  * Copyright 2010 Google Inc.

  *

  * Use of this source code is governed by a BSD-style license that can be

  * found in the LICENSE file.

  */

 #ifndef GrRectanizer_DEFINED

 #define GrRectanizer_DEFINED

 #include "GrPoint.h"

 class GrRectanizerPurgeListener {

 public:

     virtual ~GrRectanizerPurgeListener() {}

     virtual void notifyPurgeStrip(void*, int yCoord) = 0;

 };

 class GrRectanizer {

 public:

     GrRectanizer(int width, int height) : fWidth(width), fHeight(height) {

         SkASSERT(width >= 0);

         SkASSERT(height >= 0);

     }

     virtual ~GrRectanizer() {}

     virtual void reset() = 0;

     int width() const { return fWidth; }

     int height() const { return fHeight; }

     virtual bool addRect(int width, int height, GrIPoint16* loc) = 0;

     virtual float percentFull() const = 0;

     // return the Y-coordinate of a strip that should be purged, given height

     // i.e. return the oldest such strip, or some other criteria. Return -1

     // if there is no candidate

     virtual int stripToPurge(int height) const = 0;

     virtual void purgeStripAtY(int yCoord) = 0;

     /**

      *  Our factory, which returns the subclass du jour

      */

     static GrRectanizer* Factory(int width, int height);

 private:

     int fWidth;

     int fHeight;

 };

 #endif