DeferredCanvasBench.cpp revision bf3ef28f3bd86f2de488f03f1cd08b6e6203d479 
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(void* param, const char name[]) : INHERITED(param) {
15        fName.printf("deferred_canvas_%s", name);
16    }
17
18    enum {
19        N = SkBENCHLOOP(25), // number of times to create the picture
20        CANVAS_WIDTH = 200,
21        CANVAS_HEIGHT = 200,
22    };
23protected:
24    virtual const char* onGetName() {
25        return fName.c_str();
26    }
27
28    virtual void onDraw(SkCanvas* canvas) {
29        SkDevice *device = canvas->getDevice()->createCompatibleDevice(
30            SkBitmap::kARGB_8888_Config, CANVAS_WIDTH, CANVAS_HEIGHT, false);
31
32        SkDeferredCanvas deferredCanvas(device);
33
34        device->unref();
35
36        initDeferredCanvas(deferredCanvas);
37
38        for (int i = 0; i < N; i++) {
39            drawInDeferredCanvas(deferredCanvas);
40        }
41
42        finalizeDeferredCanvas(deferredCanvas);
43        deferredCanvas.flush();
44    }
45
46    virtual void initDeferredCanvas(SkDeferredCanvas& canvas) = 0;
47    virtual void drawInDeferredCanvas(SkDeferredCanvas& canvas) = 0;
48    virtual void finalizeDeferredCanvas(SkDeferredCanvas& canvas) = 0;
49
50    SkString fName;
51
52private:
53    typedef SkBenchmark INHERITED;
54};
55
56class SimpleNotificationClient : public SkDeferredCanvas::NotificationClient {
57public:
58    SimpleNotificationClient() : fDummy(false) {}
59
60    //bogus virtual implementations that just do something small
61    virtual void prepareForDraw() SK_OVERRIDE {fDummy = true;}
62    virtual void storageAllocatedForRecordingChanged(size_t) SK_OVERRIDE {fDummy = false;}
63    virtual void flushedDrawCommands() SK_OVERRIDE {fDummy = !fDummy;}
64private:
65    bool fDummy;
66};
67
68// Test that records very simple draw operations.
69// This benchmark aims to capture performance fluctuations in the recording
70// overhead of SkDeferredCanvas
71class DeferredRecordBench : public DeferredCanvasBench {
72public:
73    DeferredRecordBench(void* param)
74        : INHERITED(param, "record") {
75    }
76
77    enum {
78        M = SkBENCHLOOP(700),   // number of individual draws in each loop
79    };
80protected:
81
82    virtual void initDeferredCanvas(SkDeferredCanvas& canvas) SK_OVERRIDE {
83        canvas.setNotificationClient(&fNotificationClient);
84    }
85
86    virtual void drawInDeferredCanvas(SkDeferredCanvas& canvas) SK_OVERRIDE {
87        SkRect rect;
88        rect.setXYWH(0, 0, 10, 10);
89        SkPaint paint;
90        for (int i = 0; i < M; i++) {
91            canvas.save(SkCanvas::kMatrixClip_SaveFlag);
92            canvas.translate(SkIntToScalar(i * 27 % CANVAS_WIDTH), SkIntToScalar(i * 13 % CANVAS_HEIGHT));
93            canvas.drawRect(rect, paint);
94            canvas.restore();
95        }
96    }
97
98    virtual void finalizeDeferredCanvas(SkDeferredCanvas& canvas) SK_OVERRIDE {
99        canvas.clear(0x0);
100        canvas.setNotificationClient(NULL);
101    }
102
103private:
104    typedef DeferredCanvasBench INHERITED;
105    SimpleNotificationClient fNotificationClient;
106};
107
108
109///////////////////////////////////////////////////////////////////////////////
110
111static SkBenchmark* Fact0(void* p) { return new DeferredRecordBench(p); }
112
113static BenchRegistry gReg0(Fact0);
114