BlurImageFilterBench.cpp revision 9b051a375ba6d6b61cea98f35834cd032aaa5347 
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
24class BlurImageFilterBench : public SkBenchmark {
25public:
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
32protected:
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
50private:
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
84DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, true);)
85DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, false);)
86DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, true);)
87DEF_BENCH(return new BlurImageFilterBench(p, BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, false);)
88