blob: 66db2eb93507ee25778e261bf03af9602ef0f480 [file] [log] [blame]
robertphillips@google.com6806bda2012-09-04 13:39:01 +00001
2/*
3 * Copyright 2012 The Android Open Source Project
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
9#include "SkBenchmark.h"
10#include "SkCanvas.h"
11
12
13/**
14 * This bench mark tests the use case where the user writes the a canvas
15 * and then reads small chunks from it repeatedly. This can cause trouble
16 * for the GPU as readbacks are very expensive.
17 */
18class ReadPixBench : public SkBenchmark {
19public:
20 ReadPixBench(void* param) : INHERITED(param) {}
21
22protected:
23 virtual const char* onGetName() SK_OVERRIDE {
24 return "readpix";
25 }
26
27 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
28 canvas->clear(SK_ColorBLACK);
29
30 SkISize size = canvas->getDeviceSize();
31
32 int offX = (size.width() - kWindowSize) / kNumStepsX;
33 int offY = (size.height() - kWindowSize) / kNumStepsY;
34
35 SkPaint paint;
36
37 paint.setColor(SK_ColorBLUE);
38
skia.committer@gmail.com73bb3be2012-09-05 02:01:29 +000039 canvas->drawCircle(SkIntToScalar(size.width()/2),
40 SkIntToScalar(size.height()/2),
robertphillips@google.com6806bda2012-09-04 13:39:01 +000041 SkIntToScalar(size.width()/2),
42 paint);
43
44 SkBitmap bitmap;
45
46 bitmap.setConfig(SkBitmap::kARGB_8888_Config, kWindowSize, kWindowSize);
47
48 for (int x = 0; x < kNumStepsX; ++x) {
49 for (int y = 0; y < kNumStepsY; ++y) {
50 canvas->readPixels(&bitmap, x * offX, y * offY);
51 }
52 }
53 }
54
55private:
56 static const int kNumStepsX = 30;
57 static const int kNumStepsY = 30;
58 static const int kWindowSize = 5;
59
60 typedef SkBenchmark INHERITED;
61};
62
63////////////////////////////////////////////////////////////////////////////////
64
65static SkBenchmark* fact(void* p) { return new ReadPixBench(p); }
66static BenchRegistry gReg(fact);