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      1 /*
      2  * Copyright 2016 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 "Benchmark.h"
      9 #include "SkTileImageFilter.h"
     10 #include "SkCanvas.h"
     11 #include "SkPaint.h"
     12 #include "SkString.h"
     13 
     14 #define WIDTH 512
     15 #define HEIGHT 512
     16 
     17 // This bench exercises SkTileImageFilter drawn from a 50x50 source to
     18 // a 512x512 destination. It is drawn using a single rect, or "tiled"
     19 // rendering (using 32x32, 64x64 tiles). Tiled rendering is currently an order
     20 // of magnitude slower, since SkTileImageFilter does not clip the
     21 // source or destination rects.
     22 
     23 class TileImageFilterBench : public Benchmark {
     24 public:
     25     TileImageFilterBench(int tileSize) : fTileSize(tileSize) {
     26         if (tileSize > 0) {
     27             fName.printf("tile_image_filter_tiled_%d", tileSize);
     28         } else {
     29             fName.printf("tile_image_filter");
     30         }
     31     }
     32 
     33 protected:
     34     const char* onGetName() override {
     35         return fName.c_str();
     36     }
     37 
     38     void onDraw(int loops, SkCanvas* canvas) override {
     39         SkPaint paint;
     40         SkAutoTUnref<SkImageFilter> tile(SkTileImageFilter::Create(
     41             SkRect::MakeWH(50, 50),
     42             SkRect::MakeWH(WIDTH, HEIGHT),
     43             nullptr));
     44         paint.setImageFilter(tile);
     45 
     46         for (int i = 0; i < loops; i++) {
     47             if (fTileSize > 0) {
     48                 for (int y = 0; y < HEIGHT; y += fTileSize) {
     49                     for (int x = 0; x < WIDTH; x += fTileSize) {
     50                         canvas->save();
     51                         SkIRect clipIRect = SkIRect::MakeXYWH(x, y, fTileSize, fTileSize);
     52                         canvas->clipRect(SkRect::Make(clipIRect));
     53                         canvas->drawRect(SkRect::MakeWH(WIDTH, HEIGHT), paint);
     54                         canvas->restore();
     55                     }
     56                 }
     57             } else {
     58                 canvas->drawRect(SkRect::MakeWH(WIDTH, HEIGHT), paint);
     59             }
     60         }
     61     }
     62 
     63 private:
     64     SkString fName;
     65     // Note: this is the tile size used for tiled rendering, not for the size
     66     // of the SkTileImageFilter source rect.
     67     int fTileSize;
     68     typedef Benchmark INHERITED;
     69 };
     70 
     71 DEF_BENCH(return new TileImageFilterBench(0);)
     72 DEF_BENCH(return new TileImageFilterBench(32);)
     73 DEF_BENCH(return new TileImageFilterBench(64);)
     74