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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #include "SkBenchmark.h"
      9 #include "SkBitmap.h"
     10 #include "SkPaint.h"
     11 #include "SkCanvas.h"
     12 #include "SkColorPriv.h"
     13 #include "SkRandom.h"
     14 #include "SkString.h"
     15 
     16 static void draw_into_bitmap(const SkBitmap& bm) {
     17     const int w = bm.width();
     18     const int h = bm.height();
     19 
     20     SkCanvas canvas(bm);
     21     SkPaint p;
     22     p.setAntiAlias(true);
     23     p.setColor(SK_ColorRED);
     24     canvas.drawCircle(SkIntToScalar(w)/2, SkIntToScalar(h)/2,
     25                       SkIntToScalar(SkMin32(w, h))*3/8, p);
     26 
     27     SkRect r;
     28     r.set(0, 0, SkIntToScalar(w), SkIntToScalar(h));
     29     p.setStyle(SkPaint::kStroke_Style);
     30     p.setStrokeWidth(SkIntToScalar(4));
     31     p.setColor(SK_ColorBLUE);
     32     canvas.drawRect(r, p);
     33 }
     34 
     35 /*  Variants for bitmaprect
     36     src : entire bitmap, subset, fractional subset
     37     dst : same size as src, diff size
     38     paint : filter-p
     39  */
     40 
     41 class BitmapRectBench : public SkBenchmark {
     42     SkBitmap    fBitmap;
     43     bool        fDoFilter;
     44     bool        fSlightMatrix;
     45     uint8_t     fAlpha;
     46     SkString    fName;
     47     SkRect      fSrcR, fDstR;
     48     static const int kWidth = 128;
     49     static const int kHeight = 128;
     50     enum { N = SkBENCHLOOP(300) };
     51 public:
     52     BitmapRectBench(void* param, U8CPU alpha, bool doFilter, bool slightMatrix) : INHERITED(param) {
     53         fAlpha = SkToU8(alpha);
     54         fDoFilter = doFilter;
     55         fSlightMatrix = slightMatrix;
     56 
     57         fBitmap.setConfig(SkBitmap::kARGB_8888_Config, kWidth, kHeight);
     58     }
     59 
     60 protected:
     61     virtual const char* onGetName() SK_OVERRIDE {
     62         fName.printf("bitmaprect_%02X_%sfilter_%s",
     63                      fAlpha, fDoFilter ? "" : "no",
     64                      fSlightMatrix ? "trans" : "identity");
     65         return fName.c_str();
     66     }
     67 
     68     virtual void onPreDraw() SK_OVERRIDE {
     69         fBitmap.allocPixels();
     70         fBitmap.setIsOpaque(true);
     71         fBitmap.eraseColor(SK_ColorBLACK);
     72         draw_into_bitmap(fBitmap);
     73 
     74         fSrcR.iset(0, 0, kWidth, kHeight);
     75         fDstR.iset(0, 0, kWidth, kHeight);
     76 
     77         if (fSlightMatrix) {
     78             // want fractional translate
     79             fDstR.offset(SK_Scalar1 / 3, SK_Scalar1 * 5 / 7);
     80             // want enough to create a scale matrix, but not enough to scare
     81             // off our sniffer which tries to see if the matrix is "effectively"
     82             // translate-only.
     83             fDstR.fRight += SK_Scalar1 / (kWidth * 60);
     84         }
     85     }
     86 
     87 
     88     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
     89         SkRandom rand;
     90 
     91         SkPaint paint;
     92         this->setupPaint(&paint);
     93         paint.setFilterBitmap(fDoFilter);
     94         paint.setAlpha(fAlpha);
     95 
     96         for (int i = 0; i < N; i++) {
     97             canvas->drawBitmapRectToRect(fBitmap, &fSrcR, fDstR, &paint);
     98         }
     99     }
    100 
    101 private:
    102     typedef SkBenchmark INHERITED;
    103 };
    104 
    105 DEF_BENCH(return new BitmapRectBench(p, 0xFF, false, false))
    106 DEF_BENCH(return new BitmapRectBench(p, 0x80, false, false))
    107 DEF_BENCH(return new BitmapRectBench(p, 0xFF, true, false))
    108 DEF_BENCH(return new BitmapRectBench(p, 0x80, true, false))
    109 
    110 DEF_BENCH(return new BitmapRectBench(p, 0xFF, false, true))
    111 DEF_BENCH(return new BitmapRectBench(p, 0xFF, true, true))
    112