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