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1 /*
2  * Copyright 2011 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 #include "SkBenchmark.h"
8 #include "SkCanvas.h"
9 #include "SkPathUtils.h"
10 #include "SkRandom.h"
11 #include "SkTime.h"
12 #include "SkString.h"
13 
14 #define H 16
15 #define W 16
16 #define STRIDE 2
17 
18 //this function is redefined for sample, test, and bench. is there anywhere
19 // I can put it to avoid code duplcation?
fillRandomBits(int chars,char * bits)20 static void fillRandomBits( int chars, char* bits ){
21     SkRandom rand(SkTime::GetMSecs());
22 
23     for (int i = 0; i < chars; ++i){
24         bits[i] = rand.nextU();
25     }
26 }
27 
path_proc(char * bits,SkPath * path)28 static void path_proc(char* bits, SkPath* path) {
29     SkPathUtils::BitsToPath_Path(path, bits, H, W, STRIDE);
30 }
31 
region_proc(char * bits,SkPath * path)32 static void region_proc(char* bits, SkPath* path) {
33     SkPathUtils::BitsToPath_Region(path, bits, H, W, STRIDE);
34 }
35 
36 /// Emulates the mix of rects blitted by gmail during scrolling
37 class PathUtilsBench : public SkBenchmark {
38     typedef void (*Proc)(char*, SkPath*);
39 
40     Proc fProc;
41     SkString fName;
42     char* bits[H * STRIDE];
43 
44 public:
PathUtilsBench(Proc proc,const char name[])45     PathUtilsBench(Proc proc, const char name[])  {
46         fProc = proc;
47         fName.printf("pathUtils_%s", name);
48 
49 
50     }
51 
52 protected:
onGetName()53     virtual const char* onGetName() { return fName.c_str(); }
54 
onDraw(const int loops,SkCanvas * canvas)55     virtual void onDraw(const int loops, SkCanvas* canvas) {
56 
57         for (int i = 0; i < loops; ++i){
58             //create a random 16x16 bitmap
59             fillRandomBits(H * STRIDE, (char*) &bits);
60 
61             //use passed function pointer to handle it
62             SkPath path;
63             fProc( (char*) &bits, &path);
64         }
65     }
66 
67 private:
68     typedef SkBenchmark INHERITED;
69 };
70 
71 DEF_BENCH( return SkNEW_ARGS(PathUtilsBench, (path_proc, "path")); )
72 DEF_BENCH( return SkNEW_ARGS(PathUtilsBench, (region_proc, "region")); )
73