DeferredCanvasBench.cpp revision dbd41c885768f9fec3bd9e216518f9ea1b181a96 
1/*
2 * Copyright 2012 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 "SkBenchmark.h"
8#include "SkDeferredCanvas.h"
9#include "SkDevice.h"
10#include "SkString.h"
11
12class DeferredCanvasBench : public SkBenchmark {
13public:
14    DeferredCanvasBench(const char name[])  {
15        fName.printf("deferred_canvas_%s", name);
16    }
17
18    enum {
19        CANVAS_WIDTH = 200,
20        CANVAS_HEIGHT = 200,
21    };
22protected:
23    virtual const char* onGetName() {
24        return fName.c_str();
25    }
26
27    virtual void onDraw(SkCanvas* canvas) {
28        SkBaseDevice *device = canvas->getDevice()->createCompatibleDevice(
29            SkBitmap::kARGB_8888_Config, CANVAS_WIDTH, CANVAS_HEIGHT, false);
30
31        SkAutoTUnref<SkDeferredCanvas> deferredCanvas(SkDeferredCanvas::Create(device));
32        device->unref();
33
34        initDeferredCanvas(deferredCanvas);
35        drawInDeferredCanvas(deferredCanvas);
36        finalizeDeferredCanvas(deferredCanvas);
37        deferredCanvas->flush();
38    }
39
40    virtual void initDeferredCanvas(SkDeferredCanvas* canvas) = 0;
41    virtual void drawInDeferredCanvas(SkDeferredCanvas* canvas) = 0;
42    virtual void finalizeDeferredCanvas(SkDeferredCanvas* canvas) = 0;
43
44    SkString fName;
45
46private:
47    typedef SkBenchmark INHERITED;
48};
49
50class SimpleNotificationClient : public SkDeferredCanvas::NotificationClient {
51public:
52    SimpleNotificationClient() : fDummy(false) {}
53
54    //bogus virtual implementations that just do something small
55    virtual void prepareForDraw() SK_OVERRIDE {fDummy = true;}
56    virtual void storageAllocatedForRecordingChanged(size_t) SK_OVERRIDE {fDummy = false;}
57    virtual void flushedDrawCommands() SK_OVERRIDE {fDummy = !fDummy;}
58private:
59    bool fDummy;
60
61    typedef SkDeferredCanvas::NotificationClient INHERITED;
62};
63
64// Test that records very simple draw operations.
65// This benchmark aims to capture performance fluctuations in the recording
66// overhead of SkDeferredCanvas
67class DeferredRecordBench : public DeferredCanvasBench {
68public:
69    DeferredRecordBench()
70        : INHERITED("record") {
71    }
72
73protected:
74
75    virtual void initDeferredCanvas(SkDeferredCanvas* canvas) SK_OVERRIDE {
76        canvas->setNotificationClient(&fNotificationClient);
77    }
78
79    virtual void drawInDeferredCanvas(SkDeferredCanvas* canvas) SK_OVERRIDE {
80        SkRect rect;
81        rect.setXYWH(0, 0, 10, 10);
82        SkPaint paint;
83        for (int i = 0; i < this->getLoops(); i++) {
84            canvas->save(SkCanvas::kMatrixClip_SaveFlag);
85            canvas->translate(SkIntToScalar(i * 27 % CANVAS_WIDTH), SkIntToScalar(i * 13 % CANVAS_HEIGHT));
86            canvas->drawRect(rect, paint);
87            canvas->restore();
88        }
89    }
90
91    virtual void finalizeDeferredCanvas(SkDeferredCanvas* canvas) SK_OVERRIDE {
92        canvas->clear(0x0);
93        canvas->setNotificationClient(NULL);
94    }
95
96private:
97    typedef DeferredCanvasBench INHERITED;
98    SimpleNotificationClient fNotificationClient;
99};
100
101
102///////////////////////////////////////////////////////////////////////////////
103
104DEF_BENCH( return new DeferredRecordBench(); )
105