aboutsummaryrefslogtreecommitdiffstats
path: root/samplecode/SamplePageFlip.cpp
blob: 7c5bf480e843ac3e73351e3b692acb61e40202aa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGraphics.h"
#include "SkRandom.h"
#include "SkFlipPixelRef.h"
#include "SkPageFlipper.h"

#include <pthread.h>

#define WIDTH   200
#define HEIGHT  200

static bool gDone;

static void bounce(SkScalar* x, SkScalar* dx, const int max) {
    *x += *dx;
    if (*x < 0) {
        *x = 0;
        if (*dx < 0) {
            *dx = -*dx;
        }
    } else if (*x > SkIntToScalar(max)) {
        *x = SkIntToScalar(max);
        if (*dx > 0) {
            *dx = -*dx;
        }
    }
}

static void* draw_proc(void* context) {
    const int OVALW = 32;
    const int OVALH = 32;

    const SkBitmap* bm = static_cast<const SkBitmap*>(context);
    SkFlipPixelRef* ref = static_cast<SkFlipPixelRef*>(bm->pixelRef());

    const int DSCALE = 1;
    SkScalar    dx = SkIntToScalar(7) / DSCALE;
    SkScalar    dy = SkIntToScalar(5) / DSCALE;
    SkScalar    x = 0;
    SkScalar    y = 0;

    SkPaint paint;
    
    paint.setAntiAlias(true);
    paint.setColor(SK_ColorRED);
    
    SkRect oval;
    oval.setEmpty();

    while (!gDone) {
        ref->inval(oval, true);
        oval.set(x, y, x + SkIntToScalar(OVALW), y + SkIntToScalar(OVALH));
        ref->inval(oval, true);

        SkAutoFlipUpdate    update(ref);
        
        if (!update.dirty().isEmpty()) {
            // this must be local to the loop, since it needs to forget the pixels
            // its writing to after each iteration, since we do the swap
            SkCanvas    canvas(update.bitmap());

//            SkDebugf("----- dirty [%d %d %d %d]\n", dirty.getBounds().fLeft, dirty.getBounds().fTop, dirty.getBounds().width(), dirty.getBounds().height());
            canvas.clipRegion(update.dirty());
            
            canvas.drawColor(0, SkXfermode::kClear_Mode);            
            canvas.drawOval(oval, paint);
        }
        bounce(&x, &dx, WIDTH-OVALW);
        bounce(&y, &dy, HEIGHT-OVALH);
        
#if 1
        for (int i = 0; i < 1000; i++) {
            for (int j = 0; j < 10000; j++) {
                SkFixedMul(j, 10);
            }
        }
#endif
    }
    return NULL;
}

static const SkBitmap::Config gConfigs[] = {
    SkBitmap::kARGB_8888_Config,
#if 1
    SkBitmap::kRGB_565_Config,
    SkBitmap::kARGB_4444_Config,
    SkBitmap::kA8_Config
#endif
};

class PageFlipView : public SampleView {
public:
    
    enum { N = SK_ARRAY_COUNT(gConfigs) };
    
    pthread_t   fThreads[N];
    SkBitmap    fBitmaps[N];

	PageFlipView() {
        gDone = false;
        for (int i = 0; i < N; i++) {
            int             status;
            pthread_attr_t  attr;
            
            status = pthread_attr_init(&attr);
            SkASSERT(0 == status);

            fBitmaps[i].setConfig(gConfigs[i], WIDTH, HEIGHT);
            SkFlipPixelRef* pr = new SkFlipPixelRef(gConfigs[i], WIDTH, HEIGHT);
            fBitmaps[i].setPixelRef(pr)->unref();
            fBitmaps[i].eraseColor(0);

            status = pthread_create(&fThreads[i], &attr,  draw_proc, &fBitmaps[i]);
            SkASSERT(0 == status);
        }
        this->setBGColor(0xFFDDDDDD);
    }
    
    virtual ~PageFlipView() {
        gDone = true;
        for (int i = 0; i < N; i++) {
            void* ret;
            int status = pthread_join(fThreads[i], &ret);
            SkASSERT(0 == status);
        }
    }
    
protected:
    // overrides from SkEventSink
    virtual bool onQuery(SkEvent* evt) {
        if (SampleCode::TitleQ(*evt)) {
            SampleCode::TitleR(evt, "PageFlip");
            return true;
        }
        return this->INHERITED::onQuery(evt);
    }

    virtual void onDrawContent(SkCanvas* canvas) {
        SkScalar x = SkIntToScalar(10);
        SkScalar y = SkIntToScalar(10);
        for (int i = 0; i < N; i++) {
            canvas->drawBitmap(fBitmaps[i], x, y);
            x += SkIntToScalar(fBitmaps[i].width() + 20);
        }
        this->inval(NULL);
    }
    
    virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
        this->inval(NULL);
        return this->INHERITED::onFindClickHandler(x, y);
    }
    
    virtual bool onClick(Click* click) {
        return this->INHERITED::onClick(click);
    }
    
private:
    typedef SampleView INHERITED;
};

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory() { return new PageFlipView; }
static SkViewRegister reg(MyFactory);