The Tor Browser: gfx/skia/trunk/src/gpu/GrRectanizer.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /*

     2  * Copyright 2010 Google Inc.

     3  *

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

     5  * found in the LICENSE file.

     6  */

     8 #ifndef GrRectanizer_DEFINED

     9 #define GrRectanizer_DEFINED

    11 #include "GrPoint.h"

    13 class GrRectanizerPurgeListener {

    14 public:

    15     virtual ~GrRectanizerPurgeListener() {}

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

    18 };

    20 class GrRectanizer {

    21 public:

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

    23         SkASSERT(width >= 0);

    24         SkASSERT(height >= 0);

    25     }

    27     virtual ~GrRectanizer() {}

    29     virtual void reset() = 0;

    31     int width() const { return fWidth; }

    32     int height() const { return fHeight; }

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

    35     virtual float percentFull() const = 0;

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

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

    39     // if there is no candidate

    40     virtual int stripToPurge(int height) const = 0;

    41     virtual void purgeStripAtY(int yCoord) = 0;

    43     /**

    44      *  Our factory, which returns the subclass du jour

    45      */

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

    48 private:

    49     int fWidth;

    50     int fHeight;

    51 };

    53 #endif

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