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;
}
Esempio n. 2
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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();

    SkRect clipR = SkRect::MakeWH(SkIntToScalar(bm->width()), SkIntToScalar(bm->height()));
    clipR.inset(SK_Scalar1/4, SK_Scalar1/4);

    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());
            canvas.clipRegion(update.dirty());
            canvas.drawColor(0, SkXfermode::kClear_Mode);
            canvas.clipRect(clipR, SkRegion::kIntersect_Op, true);

            canvas.drawOval(oval, paint);
        }
        bounce(&x, &dx, WIDTH-OVALW);
        bounce(&y, &dy, HEIGHT-OVALH);
    }
    return NULL;
}