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
13SkBBoxHierarchy* 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
27SkBBoxHierarchy* 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