submodule/skia/bench/DrawBitmapAABench.cpp

   1 /*
   2  * Copyright 2015 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 "bench/Benchmark.h"
   8 #include "include/core/SkCanvas.h"
   9 #include "include/core/SkImage.h"
  10 #include "include/core/SkMatrix.h"
  11 #include "include/core/SkPaint.h"
  12 #include "include/core/SkString.h"
  13 #include "include/core/SkSurface.h"
  14
  15 /**
  16  * This bench measures the rendering time of SkCanvas::drawBitmap with different anti-aliasing /
  17  * matrix combinations.
  18  */
  19
  20 class DrawBitmapAABench : public Benchmark {
  21 public:
  22     DrawBitmapAABench(bool doAA, const SkMatrix& matrix, const char name[])
  23         : fMatrix(matrix)
  24         , fName("draw_bitmap_") {
  25
  26         fPaint.setAntiAlias(doAA);
  27         fName.appendf("%s_%s", doAA ? "aa" : "noaa", name);
  28     }
  29
  30 protected:
  31     const char* onGetName() override {
  32         return fName.c_str();
  33     }
  34
  35     void onDelayedSetup() override {
  36         auto surf = SkSurface::MakeRasterN32Premul(200, 200);
  37         surf->getCanvas()->clear(0xFF00FF00);
  38         fImage = surf->makeImageSnapshot();
  39     }
  40
  41     void onDraw(int loops, SkCanvas* canvas) override {
  42         SkSamplingOptions sampling(SkFilterMode::kLinear);
  43         canvas->concat(fMatrix);
  44         for (int i = 0; i < loops; i++) {
  45             canvas->drawImage(fImage.get(), 0, 0, sampling, &fPaint);
  46         }
  47     }
  48
  49 private:
  50     SkPaint  fPaint;
  51     SkMatrix fMatrix;
  52     SkString fName;
  53     sk_sp<SkImage> fImage;
  54
  55     using INHERITED = Benchmark;
  56 };
  57
  58 DEF_BENCH( return new DrawBitmapAABench(false, SkMatrix::I(), "ident"); )
  59
  60 DEF_BENCH( return new DrawBitmapAABench(false, SkMatrix::Scale(1.17f, 1.17f), "scale"); )
  61
  62 DEF_BENCH( return new DrawBitmapAABench(false, SkMatrix::Translate(17.5f, 17.5f), "translate"); )
  63
  64 DEF_BENCH(
  65     SkMatrix m;
  66     m.reset();
  67     m.preRotate(15);
  68     return new DrawBitmapAABench(false, m, "rotate");
  69 )
  70
  71 DEF_BENCH( return new DrawBitmapAABench(true, SkMatrix::I(), "ident"); )
  72
  73 DEF_BENCH( return new DrawBitmapAABench(true, SkMatrix::Scale(1.17f, 1.17f), "scale"); )
  74
  75 DEF_BENCH( return new DrawBitmapAABench(true, SkMatrix::Translate(17.5f, 17.5f), "translate"); )
  76
  77 DEF_BENCH(
  78     SkMatrix m;
  79     m.reset();
  80     m.preRotate(15);
  81     return new DrawBitmapAABench(true, m, "rotate");
  82 )