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.
14 // confine rectangles to a smallish area, so queries generally hit something, and overlap occurs:
15 static const SkScalar GENERATE_EXTENTS = 1000.0f;
16 static const int NUM_BUILD_RECTS = 500;
17 static const int NUM_QUERY_RECTS = 5000;
18 static const int GRID_WIDTH = 100;
20 typedef SkRect (*MakeRectProc)(SkRandom&, int, int);
22 // Time how long it takes to build an R-Tree.
23 class RTreeBuildBench : public Benchmark {
25 RTreeBuildBench(const char* name, MakeRectProc proc) : fProc(proc) {
26 fName.printf("rtree_%s_build", name);
29 bool isSuitableFor(Backend backend) SK_OVERRIDE {
30 return backend == kNonRendering_Backend;
34 const char* onGetName() SK_OVERRIDE {
37 void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
39 SkAutoTMalloc<SkRect> rects(NUM_BUILD_RECTS);
40 for (int i = 0; i < NUM_BUILD_RECTS; ++i) {
41 rects[i] = fProc(rand, i, NUM_BUILD_RECTS);
44 for (int i = 0; i < loops; ++i) {
46 tree.insert(rects.get(), NUM_BUILD_RECTS);
47 SkASSERT(rects != NULL); // It'd break this bench if the tree took ownership of rects.
53 typedef Benchmark INHERITED;
56 // Time how long it takes to perform queries on an R-Tree.
57 class RTreeQueryBench : public Benchmark {
59 RTreeQueryBench(const char* name, MakeRectProc proc) : fProc(proc) {
60 fName.printf("rtree_%s_query", name);
63 bool isSuitableFor(Backend backend) SK_OVERRIDE {
64 return backend == kNonRendering_Backend;
67 const char* onGetName() SK_OVERRIDE {
70 void onPreDraw() SK_OVERRIDE {
72 SkAutoTMalloc<SkRect> rects(NUM_QUERY_RECTS);
73 for (int i = 0; i < NUM_QUERY_RECTS; ++i) {
74 rects[i] = fProc(rand, i, NUM_QUERY_RECTS);
76 fTree.insert(rects.get(), NUM_QUERY_RECTS);
79 void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
81 for (int i = 0; i < loops; ++i) {
82 SkTDArray<unsigned> hits;
84 query.fLeft = rand.nextRangeF(0, GENERATE_EXTENTS);
85 query.fTop = rand.nextRangeF(0, GENERATE_EXTENTS);
86 query.fRight = query.fLeft + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/2);
87 query.fBottom = query.fTop + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/2);
88 fTree.search(query, &hits);
95 typedef Benchmark INHERITED;
98 static inline SkRect make_XYordered_rects(SkRandom& rand, int index, int numRects) {
100 out.fLeft = SkIntToScalar(index % GRID_WIDTH);
101 out.fTop = SkIntToScalar(index / GRID_WIDTH);
102 out.fRight = out.fLeft + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/3);
103 out.fBottom = out.fTop + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/3);
106 static inline SkRect make_YXordered_rects(SkRandom& rand, int index, int numRects) {
108 out.fLeft = SkIntToScalar(index / GRID_WIDTH);
109 out.fTop = SkIntToScalar(index % GRID_WIDTH);
110 out.fRight = out.fLeft + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/3);
111 out.fBottom = out.fTop + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/3);
115 static inline SkRect make_random_rects(SkRandom& rand, int index, int numRects) {
117 out.fLeft = rand.nextRangeF(0, GENERATE_EXTENTS);
118 out.fTop = rand.nextRangeF(0, GENERATE_EXTENTS);
119 out.fRight = out.fLeft + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/5);
120 out.fBottom = out.fTop + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/5);
124 static inline SkRect make_concentric_rects(SkRandom&, int index, int numRects) {
125 return SkRect::MakeWH(SkIntToScalar(index+1), SkIntToScalar(index+1));
128 ///////////////////////////////////////////////////////////////////////////////
130 DEF_BENCH(return SkNEW_ARGS(RTreeBuildBench, ("XY", &make_XYordered_rects)));
131 DEF_BENCH(return SkNEW_ARGS(RTreeBuildBench, ("YX", &make_YXordered_rects)));
132 DEF_BENCH(return SkNEW_ARGS(RTreeBuildBench, ("random", &make_random_rects)));
133 DEF_BENCH(return SkNEW_ARGS(RTreeBuildBench, ("concentric", &make_concentric_rects)));
135 DEF_BENCH(return SkNEW_ARGS(RTreeQueryBench, ("XY", &make_XYordered_rects)));
136 DEF_BENCH(return SkNEW_ARGS(RTreeQueryBench, ("YX", &make_YXordered_rects)));
137 DEF_BENCH(return SkNEW_ARGS(RTreeQueryBench, ("random", &make_random_rects)));
138 DEF_BENCH(return SkNEW_ARGS(RTreeQueryBench, ("concentric", &make_concentric_rects)));