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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?
     20 static void fillRandomBits( int chars, char* bits ){
     21     SkMWCRandom rand(SkTime::GetMSecs());
     22 
     23     for (int i = 0; i < chars; ++i){
     24         bits[i] = rand.nextU();
     25     }
     26 }
     27 
     28 static void path_proc(char* bits, SkPath* path) {
     29     SkPathUtils::BitsToPath_Path(path, bits, H, W, STRIDE);
     30 }
     31 
     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     enum { N = SkBENCHLOOP(20) };
     45 
     46 public:
     47     PathUtilsBench(void* param, Proc proc, const char name[]) : INHERITED(param) {
     48         fProc = proc;
     49         fName.printf("pathUtils_%s", name);
     50 
     51 
     52     }
     53 
     54 protected:
     55     virtual const char* onGetName() { return fName.c_str(); }
     56 
     57     virtual void onDraw(SkCanvas* canvas) {
     58 
     59         for (int i = 0; i < N; ++i){
     60             //create a random 16x16 bitmap
     61             fillRandomBits(H * STRIDE, (char*) &bits);
     62 
     63             //use passed function pointer to handle it
     64             SkPath path;
     65             fProc( (char*) &bits, &path);
     66         }
     67     }
     68 
     69 private:
     70     typedef SkBenchmark INHERITED;
     71 };
     72 
     73 static SkBenchmark* PU_path(void* p) { return SkNEW_ARGS(PathUtilsBench, (p, path_proc, "path")); }
     74 static SkBenchmark* PU_region(void* p) { return SkNEW_ARGS(PathUtilsBench, (p, region_proc, "region")); }
     75 
     76 static BenchRegistry PU_Path(PU_path);
     77 static BenchRegistry PU_Region(PU_region);
     78