2 * Copyright 2012 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef SkTileGrid_DEFINED
9 #define SkTileGrid_DEFINED
11 #include "SkBBHFactory.h"
12 #include "SkBBoxHierarchy.h"
15 * Subclass of SkBBoxHierarchy that stores elements in buckets that correspond
16 * to tile regions, disposed in a regular grid. This is useful when the tile
17 * structure that will be use in search() calls is known prior to insertion.
19 class SkTileGrid : public SkBBoxHierarchy {
21 SkTileGrid(int xTiles, int yTiles, const SkTileGridFactory::TileGridInfo& info);
22 virtual ~SkTileGrid();
24 virtual void insert(SkAutoTMalloc<SkRect>* boundsArray, int N) SK_OVERRIDE;
25 virtual void search(const SkRect& query, SkTDArray<unsigned>* results) const SK_OVERRIDE;
28 int tileCount(int x, int y) { return fTiles[y * fXTiles + x].count(); }
34 void commonAdjust(SkRect*) const;
35 void userToGrid(const SkRect&, SkIRect* grid) const;
37 const int fXTiles, fYTiles;
38 const SkScalar fInvWidth, fInvHeight;
39 const SkScalar fMarginWidth, fMarginHeight;
40 const SkPoint fOffset;
41 const SkRect fGridBounds;
43 // (fXTiles * fYTiles) SkTDArrays, each listing ops overlapping that tile in order.
44 SkTDArray<unsigned>* fTiles;
46 typedef SkBBoxHierarchy INHERITED;