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      1 /*
      2  * Copyright 2013 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 "SkBenchmark.h"
      9 #include "SkBlurImageFilter.h"
     10 #include "SkCanvas.h"
     11 #include "SkDevice.h"
     12 #include "SkPaint.h"
     13 #include "SkRandom.h"
     14 #include "SkShader.h"
     15 #include "SkString.h"
     16 
     17 #define FILTER_WIDTH_SMALL  32
     18 #define FILTER_HEIGHT_SMALL 32
     19 #define FILTER_WIDTH_LARGE  256
     20 #define FILTER_HEIGHT_LARGE 256
     21 #define BLUR_SIGMA_SMALL    SkFloatToScalar(1.0f)
     22 #define BLUR_SIGMA_LARGE    SkFloatToScalar(10.0f)
     23 
     24 class BlurImageFilterBench : public SkBenchmark {
     25 public:
     26     BlurImageFilterBench(void* param, SkScalar sigmaX, SkScalar sigmaY,  bool small) :
     27         INHERITED(param), fIsSmall(small), fInitialized(false), fSigmaX(sigmaX), fSigmaY(sigmaY) {
     28         fName.printf("blur_image_filter_%s_%.2f_%.2f", fIsSmall ? "small" : "large",
     29             SkScalarToFloat(sigmaX), SkScalarToFloat(sigmaY));
     30     }
     31 
     32 protected:
     33     virtual const char* onGetName() SK_OVERRIDE {
     34         return fName.c_str();
     35     }
     36 
     37     virtual void onPreDraw() SK_OVERRIDE {
     38         if (!fInitialized) {
     39             make_checkerboard();
     40             fInitialized = true;
     41         }
     42     }
     43 
     44     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
     45         SkPaint paint;
     46         paint.setImageFilter(new SkBlurImageFilter(fSigmaX, fSigmaY))->unref();
     47         canvas->drawBitmap(fCheckerboard, 0, 0, &paint);
     48     }
     49 
     50 private:
     51     void make_checkerboard() {
     52         const int w = fIsSmall ? FILTER_WIDTH_SMALL : FILTER_WIDTH_LARGE;
     53         const int h = fIsSmall ? FILTER_HEIGHT_LARGE : FILTER_HEIGHT_LARGE;
     54         fCheckerboard.setConfig(SkBitmap::kARGB_8888_Config, w, h);
     55         fCheckerboard.allocPixels();
     56         SkDevice device(fCheckerboard);
     57         SkCanvas canvas(&device);
     58         canvas.clear(0x00000000);
     59         SkPaint darkPaint;
     60         darkPaint.setColor(0xFF804020);
     61         SkPaint lightPaint;
     62         lightPaint.setColor(0xFF244484);
     63         for (int y = 0; y < h; y += 16) {
     64             for (int x = 0; x < w; x += 16) {
     65                 canvas.save();
     66                 canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
     67                 canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
     68                 canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
     69                 canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
     70                 canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
     71                 canvas.restore();
     72             }
     73         }
     74     }
     75 
     76     SkString fName;
     77     bool fIsSmall;
     78     bool fInitialized;
     79     SkBitmap fCheckerboard;
     80     SkScalar fSigmaX, fSigmaY;
     81     typedef SkBenchmark INHERITED;
     82 };
     83 
     84 DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, true);)
     85 DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, false);)
     86 DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, true);)
     87 DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, false);)
     88