1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/GrRectanizer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,53 @@
1.4 +/*
1.5 + * Copyright 2010 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef GrRectanizer_DEFINED
1.12 +#define GrRectanizer_DEFINED
1.13 +
1.14 +#include "GrPoint.h"
1.15 +
1.16 +class GrRectanizerPurgeListener {
1.17 +public:
1.18 + virtual ~GrRectanizerPurgeListener() {}
1.19 +
1.20 + virtual void notifyPurgeStrip(void*, int yCoord) = 0;
1.21 +};
1.22 +
1.23 +class GrRectanizer {
1.24 +public:
1.25 + GrRectanizer(int width, int height) : fWidth(width), fHeight(height) {
1.26 + SkASSERT(width >= 0);
1.27 + SkASSERT(height >= 0);
1.28 + }
1.29 +
1.30 + virtual ~GrRectanizer() {}
1.31 +
1.32 + virtual void reset() = 0;
1.33 +
1.34 + int width() const { return fWidth; }
1.35 + int height() const { return fHeight; }
1.36 +
1.37 + virtual bool addRect(int width, int height, GrIPoint16* loc) = 0;
1.38 + virtual float percentFull() const = 0;
1.39 +
1.40 + // return the Y-coordinate of a strip that should be purged, given height
1.41 + // i.e. return the oldest such strip, or some other criteria. Return -1
1.42 + // if there is no candidate
1.43 + virtual int stripToPurge(int height) const = 0;
1.44 + virtual void purgeStripAtY(int yCoord) = 0;
1.45 +
1.46 + /**
1.47 + * Our factory, which returns the subclass du jour
1.48 + */
1.49 + static GrRectanizer* Factory(int width, int height);
1.50 +
1.51 +private:
1.52 + int fWidth;
1.53 + int fHeight;
1.54 +};
1.55 +
1.56 +#endif
