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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 "Benchmark.h"
      9 #include "SkCanvas.h"
     10 #include "SkPaint.h"
     11 #include "SkRandom.h"
     12 
     13 /**
     14  * Draws full screen opaque rectangles. It is designed to test any optimizations in the GPU backend
     15  * to turn such draws into clears.
     16  */
     17 class FSRectBench : public Benchmark {
     18 public:
     19     FSRectBench() : fInit(false) { }
     20 
     21 protected:
     22     const char* onGetName() override { return "fullscreen_rects"; }
     23 
     24     void onDelayedSetup() override {
     25         if (!fInit) {
     26             SkRandom rand;
     27             static const SkScalar kMinOffset = 0;
     28             static const SkScalar kMaxOffset = 100 * SK_Scalar1;
     29             static const SkScalar kOffsetRange = kMaxOffset - kMinOffset;
     30             for (int i = 0; i < N; ++i) {
     31                 fRects[i].fLeft = -kMinOffset - rand.nextUScalar1() * kOffsetRange;
     32                 fRects[i].fTop = -kMinOffset - rand.nextUScalar1() * kOffsetRange;
     33                 fRects[i].fRight = W + kMinOffset + rand.nextUScalar1() * kOffsetRange;
     34                 fRects[i].fBottom = H + kMinOffset + rand.nextUScalar1() * kOffsetRange;
     35                 fColors[i] = rand.nextU() | 0xFF000000;
     36             }
     37             fInit = true;
     38         }
     39     }
     40 
     41     void onDraw(int loops, SkCanvas* canvas) override {
     42         SkPaint paint;
     43         for (int i = 0; i < loops; ++i) {
     44             paint.setColor(fColors[i % N]);
     45             canvas->drawRect(fRects[i % N], paint);
     46         }
     47     }
     48 
     49 private:
     50     enum {
     51         W = 640,
     52         H = 480,
     53         N = 300,
     54     };
     55     SkRect  fRects[N];
     56     SkColor fColors[N];
     57     bool fInit;
     58 
     59     typedef Benchmark INHERITED;
     60 };
     61 
     62 DEF_BENCH(return new FSRectBench();)
     63