• Home
  • History
  • Annotate
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright 2014 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  */
7 
8 #include "SkBBHFactory.h"
9 #include "SkRTree.h"
10 #include "SkTileGrid.h"
11 
12 
operator ()(int width,int height) const13 SkBBoxHierarchy* SkRTreeFactory::operator()(int width, int height) const {
14     // These values were empirically determined to produce reasonable
15     // performance in most cases.
16     static const int kRTreeMinChildren = 6;
17     static const int kRTreeMaxChildren = 11;
18 
19     SkScalar aspectRatio = SkScalarDiv(SkIntToScalar(width),
20                                        SkIntToScalar(height));
21     bool sortDraws = false;  // Do not sort draw calls when bulk loading.
22 
23     return SkRTree::Create(kRTreeMinChildren, kRTreeMaxChildren,
24                            aspectRatio, sortDraws);
25 }
26 
operator ()(int width,int height) const27 SkBBoxHierarchy* SkTileGridFactory::operator()(int width, int height) const {
28     SkASSERT(fInfo.fMargin.width() >= 0);
29     SkASSERT(fInfo.fMargin.height() >= 0);
30     // Note: SkIRects are non-inclusive of the right() column and bottom() row.
31     // For example, an SkIRect at 0,0 with a size of (1,1) will only have
32     // content at pixel (0,0) and will report left=0 and right=1, hence the
33     // "-1"s below.
34     int xTileCount = (width + fInfo.fTileInterval.width() - 1) / fInfo.fTileInterval.width();
35     int yTileCount = (height + fInfo.fTileInterval.height() - 1) / fInfo.fTileInterval.height();
36     return SkNEW_ARGS(SkTileGrid, (xTileCount, yTileCount, fInfo));
37 }
38