michael@0: /*
michael@0:  * Copyright 2010 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef GrRectanizer_DEFINED
michael@0: #define GrRectanizer_DEFINED
michael@0: 
michael@0: #include "GrPoint.h"
michael@0: 
michael@0: class GrRectanizerPurgeListener {
michael@0: public:
michael@0:     virtual ~GrRectanizerPurgeListener() {}
michael@0: 
michael@0:     virtual void notifyPurgeStrip(void*, int yCoord) = 0;
michael@0: };
michael@0: 
michael@0: class GrRectanizer {
michael@0: public:
michael@0:     GrRectanizer(int width, int height) : fWidth(width), fHeight(height) {
michael@0:         SkASSERT(width >= 0);
michael@0:         SkASSERT(height >= 0);
michael@0:     }
michael@0: 
michael@0:     virtual ~GrRectanizer() {}
michael@0: 
michael@0:     virtual void reset() = 0;
michael@0: 
michael@0:     int width() const { return fWidth; }
michael@0:     int height() const { return fHeight; }
michael@0: 
michael@0:     virtual bool addRect(int width, int height, GrIPoint16* loc) = 0;
michael@0:     virtual float percentFull() const = 0;
michael@0: 
michael@0:     // return the Y-coordinate of a strip that should be purged, given height
michael@0:     // i.e. return the oldest such strip, or some other criteria. Return -1
michael@0:     // if there is no candidate
michael@0:     virtual int stripToPurge(int height) const = 0;
michael@0:     virtual void purgeStripAtY(int yCoord) = 0;
michael@0: 
michael@0:     /**
michael@0:      *  Our factory, which returns the subclass du jour
michael@0:      */
michael@0:     static GrRectanizer* Factory(int width, int height);
michael@0: 
michael@0: private:
michael@0:     int fWidth;
michael@0:     int fHeight;
michael@0: };
michael@0: 
michael@0: #endif