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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Benchmark.h"
#include "SkCanvas.h"
#include "SkRTree.h"
#include "SkRandom.h"
#include "SkString.h"
// confine rectangles to a smallish area, so queries generally hit something, and overlap occurs:
static const SkScalar GENERATE_EXTENTS = 1000.0f;
static const int NUM_BUILD_RECTS = 500;
static const int NUM_QUERY_RECTS = 5000;
static const int GRID_WIDTH = 100;
typedef SkRect (*MakeRectProc)(SkRandom&, int, int);
// Time how long it takes to build an R-Tree.
class RTreeBuildBench : public Benchmark {
public:
RTreeBuildBench(const char* name, MakeRectProc proc) : fProc(proc) {
fName.printf("rtree_%s_build", name);
}
virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
return backend == kNonRendering_Backend;
}
protected:
virtual const char* onGetName() SK_OVERRIDE {
return fName.c_str();
}
virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
SkRandom rand;
SkAutoTMalloc<SkRect> rects(NUM_BUILD_RECTS);
for (int i = 0; i < NUM_BUILD_RECTS; ++i) {
rects[i] = fProc(rand, i, NUM_BUILD_RECTS);
}
for (int i = 0; i < loops; ++i) {
SkRTree tree;
tree.insert(&rects, NUM_BUILD_RECTS);
SkASSERT(rects != NULL); // It'd break this bench if the tree took ownership of rects.
}
}
private:
MakeRectProc fProc;
SkString fName;
typedef Benchmark INHERITED;
};
// Time how long it takes to perform queries on an R-Tree.
class RTreeQueryBench : public Benchmark {
public:
RTreeQueryBench(const char* name, MakeRectProc proc) : fProc(proc) {
fName.printf("rtree_%s_query", name);
}
virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
return backend == kNonRendering_Backend;
}
protected:
virtual const char* onGetName() SK_OVERRIDE {
return fName.c_str();
}
virtual void onPreDraw() SK_OVERRIDE {
SkRandom rand;
SkAutoTMalloc<SkRect> rects(NUM_QUERY_RECTS);
for (int i = 0; i < NUM_QUERY_RECTS; ++i) {
rects[i] = fProc(rand, i, NUM_QUERY_RECTS);
}
fTree.insert(&rects, NUM_QUERY_RECTS);
}
virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
SkRandom rand;
for (int i = 0; i < loops; ++i) {
SkTDArray<unsigned> hits;
SkRect query;
query.fLeft = rand.nextRangeF(0, GENERATE_EXTENTS);
query.fTop = rand.nextRangeF(0, GENERATE_EXTENTS);
query.fRight = query.fLeft + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/2);
query.fBottom = query.fTop + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/2);
fTree.search(query, &hits);
}
}
private:
SkRTree fTree;
MakeRectProc fProc;
SkString fName;
typedef Benchmark INHERITED;
};
static inline SkRect make_XYordered_rects(SkRandom& rand, int index, int numRects) {
SkRect out;
out.fLeft = SkIntToScalar(index % GRID_WIDTH);
out.fTop = SkIntToScalar(index / GRID_WIDTH);
out.fRight = out.fLeft + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/3);
out.fBottom = out.fTop + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/3);
return out;
}
static inline SkRect make_YXordered_rects(SkRandom& rand, int index, int numRects) {
SkRect out;
out.fLeft = SkIntToScalar(index / GRID_WIDTH);
out.fTop = SkIntToScalar(index % GRID_WIDTH);
out.fRight = out.fLeft + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/3);
out.fBottom = out.fTop + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/3);
return out;
}
static inline SkRect make_random_rects(SkRandom& rand, int index, int numRects) {
SkRect out;
out.fLeft = rand.nextRangeF(0, GENERATE_EXTENTS);
out.fTop = rand.nextRangeF(0, GENERATE_EXTENTS);
out.fRight = out.fLeft + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/5);
out.fBottom = out.fTop + 1 + rand.nextRangeF(0, GENERATE_EXTENTS/5);
return out;
}
static inline SkRect make_concentric_rects(SkRandom&, int index, int numRects) {
return SkRect::MakeWH(SkIntToScalar(index+1), SkIntToScalar(index+1));
}
///////////////////////////////////////////////////////////////////////////////
DEF_BENCH(return SkNEW_ARGS(RTreeBuildBench, ("XY", &make_XYordered_rects)));
DEF_BENCH(return SkNEW_ARGS(RTreeBuildBench, ("YX", &make_YXordered_rects)));
DEF_BENCH(return SkNEW_ARGS(RTreeBuildBench, ("random", &make_random_rects)));
DEF_BENCH(return SkNEW_ARGS(RTreeBuildBench, ("concentric", &make_concentric_rects)));
DEF_BENCH(return SkNEW_ARGS(RTreeQueryBench, ("XY", &make_XYordered_rects)));
DEF_BENCH(return SkNEW_ARGS(RTreeQueryBench, ("YX", &make_YXordered_rects)));
DEF_BENCH(return SkNEW_ARGS(RTreeQueryBench, ("random", &make_random_rects)));
DEF_BENCH(return SkNEW_ARGS(RTreeQueryBench, ("concentric", &make_concentric_rects)));
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