qwindowsurface_qws.cpp

奇趣公司比较新的qt/emd版本

void QWSLocalMemSurface::setGeometry(const QRect &rect)
{
    QSize size = rect.size();

    QWidget *win = window();
    if (win && !win->mask().isEmpty()) {
        const QRegion region = win->mask()
                               & rect.translated(-win->geometry().topLeft());
        size = region.boundingRect().size();
    }

    if (img.size() != size) {
        QImage::Format imageFormat = preferredImageFormat(win);
        const int bytesPerPixel = imageFormat == QImage::Format_RGB16 ? 2 : 4;

        const int bpl = (size.width() * bytesPerPixel + 3) & ~3;
        memsize = bpl * size.height();

        delete[] mem;
        if (memsize == 0) {
            mem = 0;
            img = QImage();
        } else {
            mem = new uchar[memsize];
            img = QImage(mem, size.width(), size.height(), imageFormat);
            setImageMetrics(img, win);
        }
    }

    QWSWindowSurface::setGeometry(rect);
}

QByteArray QWSLocalMemSurface::permanentState() const
{
    QByteArray array;
    array.resize(sizeof(uchar*) + 3 * sizeof(int) +
                 sizeof(SurfaceFlags));

    char *ptr = array.data();

    *reinterpret_cast<uchar**>(ptr) = mem;
    ptr += sizeof(uchar*);

    reinterpret_cast<int*>(ptr)[0] = img.width();
    reinterpret_cast<int*>(ptr)[1] = img.height();
    ptr += 2 * sizeof(int);

    *reinterpret_cast<int *>(ptr) = img.format();
    ptr += sizeof(int);

    *reinterpret_cast<SurfaceFlags*>(ptr) = surfaceFlags();

    return array;
}

void QWSLocalMemSurface::setPermanentState(const QByteArray &data)
{
    int width;
    int height;
    QImage::Format format;
    SurfaceFlags flags;

    const char *ptr = data.constData();

    mem = *reinterpret_cast<uchar* const*>(ptr);
    ptr += sizeof(uchar*);

    width = reinterpret_cast<const int*>(ptr)[0];
    height = reinterpret_cast<const int*>(ptr)[1];
    ptr += 2 * sizeof(int);

    format = QImage::Format(*reinterpret_cast<const int*>(ptr));
    ptr += sizeof(int);

    flags = *reinterpret_cast<const SurfaceFlags*>(ptr);

    QWSMemorySurface::img = QImage(mem, width, height, format);
    setSurfaceFlags(flags);
}

#ifndef QT_NO_QWS_MULTIPROCESS

QWSSharedMemSurface::QWSSharedMemSurface()
    : QWSMemorySurface()
{
}

QWSSharedMemSurface::QWSSharedMemSurface(QWidget *widget)
    : QWSMemorySurface(widget)
{
}

QWSSharedMemSurface::~QWSSharedMemSurface()
{
    // mem.detach() is done automatically by ~QSharedMemory
}

bool QWSSharedMemSurface::setMemory(int memId)
{
    if (mem.id() == memId)
        return true;

    mem.detach();
    if (!mem.attach(memId)) {
        perror("QWSSharedMemSurface: attaching to shared memory");
        qCritical("QWSSharedMemSurface: Error attaching to"
                  " shared memory 0x%x", memId);
        return false;
    }

    return true;
}

void QWSSharedMemSurface::setPermanentState(const QByteArray &data)
{
    int memId;
    int width;
    int height;
    int lockId;
    QImage::Format format;
    SurfaceFlags flags;

    const char *ptr = data.constData();

    memId = reinterpret_cast<const int*>(ptr)[0];
    width = reinterpret_cast<const int*>(ptr)[1];
    height = reinterpret_cast<const int*>(ptr)[2];
    lockId = reinterpret_cast<const int*>(ptr)[3];
    ptr += 4 * sizeof(int);

    format = *reinterpret_cast<const QImage::Format*>(ptr);
    ptr += sizeof(QImage::Format);
    flags = *reinterpret_cast<const SurfaceFlags*>(ptr);

    setSurfaceFlags(flags);
    setMemory(memId);
    setLock(lockId);

    uchar *base = static_cast<uchar*>(mem.address());
    QWSMemorySurface::img = QImage(base, width, height, format);
}

void QWSSharedMemSurface::setGeometry(const QRect &rect)
{
    const QSize size = rect.size();
    if (img.size() != size) {
        QWidget *win = window();
        QImage::Format imageFormat = preferredImageFormat(win);
        const int bytesPerPixel = imageFormat == QImage::Format_RGB16 ? 2 : 4;

        const int bpl = (size.width() * bytesPerPixel + 3) & ~3;
        const int imagesize = bpl * size.height();

        if (imagesize == 0) {
            mem.detach();
            img = QImage();
        } else {
            mem.detach();
            if (!mem.create(imagesize)) {
                perror("QWSSharedMemSurface::setGeometry allocating shared memory");
                qFatal("Error creating shared memory of size %d", imagesize);
            }
            uchar *base = static_cast<uchar*>(mem.address());
            img = QImage(base, size.width(), size.height(), imageFormat);
            setImageMetrics(img, win);
        }
    }

    QWSWindowSurface::setGeometry(rect);
}

QByteArray QWSSharedMemSurface::permanentState() const
{
    QByteArray array;
    array.resize(4 * sizeof(int) + sizeof(QImage::Format) +
                 sizeof(SurfaceFlags));

    char *ptr = array.data();

    reinterpret_cast<int*>(ptr)[0] = mem.id();
    reinterpret_cast<int*>(ptr)[1] = img.width();
    reinterpret_cast<int*>(ptr)[2] = img.height();
    reinterpret_cast<int*>(ptr)[3] = (memlock ? memlock->id() : -1);
    ptr += 4 * sizeof(int);

    *reinterpret_cast<QImage::Format*>(ptr) = img.format();
    ptr += sizeof(QImage::Format);

    *reinterpret_cast<SurfaceFlags*>(ptr) = surfaceFlags();

    return array;
}

#endif // QT_NO_QWS_MULTIPROCESS

#ifndef QT_NO_PAINTONSCREEN

QWSOnScreenSurface::QWSOnScreenSurface(QWidget *w)
    : QWSMemorySurface(w)
{
    attachToScreen(getScreen(w));
    setSurfaceFlags(Opaque);
}

QWSOnScreenSurface::QWSOnScreenSurface()
    : QWSMemorySurface()
{
    setSurfaceFlags(Opaque);
}

void QWSOnScreenSurface::attachToScreen(const QScreen *s)
{
    screen = s;
    uchar *base = screen->base();
    QImage::Format format  = screen->pixelFormat();

    if (format == QImage::Format_Invalid || format == QImage::Format_Indexed8) {
        //### currently we have no paint engine for indexed image formats
        qFatal("QWSOnScreenSurface::attachToScreen(): screen depth %d "
               "not implemented", screen->depth());
        return;
    }
    QWSMemorySurface::img = QImage(base, screen->width(), screen->height(),
                                   screen->linestep(), format );
}

QWSOnScreenSurface::~QWSOnScreenSurface()
{
}

QPoint QWSOnScreenSurface::painterOffset() const
{
    return geometry().topLeft() + QWSWindowSurface::painterOffset();
}

bool QWSOnScreenSurface::isValid() const
{
    const QWidget *win = window();
    if (screen != getScreen(win))
        return false;
    if (img.isNull())
        return false;
    return QScreen::isWidgetPaintOnScreen(win);
}

QByteArray QWSOnScreenSurface::permanentState() const
{
    QByteArray array;
    array.resize(sizeof(int));
    int *ptr = reinterpret_cast<int*>(array.data());
    ptr[0] = QApplication::desktop()->screenNumber(window());
    return array;
}

void QWSOnScreenSurface::setPermanentState(const QByteArray &data)
{
    const int *ptr = reinterpret_cast<const int*>(data.constData());
    const int screenNo = ptr[0];

    QScreen *screen = qt_screen;
    if (screenNo > 0)
        screen = qt_screen->subScreens().at(screenNo);
    attachToScreen(screen);
}

#endif // QT_NO_PAINTONSCREEN

#ifndef QT_NO_PAINT_DEBUG

QWSYellowSurface::QWSYellowSurface(bool isClient)
    : QWSWindowSurface(), delay(10)
{
    if (isClient) {
        setWinId(QWidget::qwsDisplay()->takeId());
        QWidget::qwsDisplay()->nameRegion(winId(),
                                          QLatin1String("Debug flush paint"),
                                          QLatin1String("Silly yellow thing"));
        QWidget::qwsDisplay()->setAltitude(winId(), 1, true);
    }
    setSurfaceFlags(Buffered);
}

QWSYellowSurface::~QWSYellowSurface()
{
}

QByteArray QWSYellowSurface::permanentState() const
{
    QByteArray array;
    array.resize(2 * sizeof(int));

    int *ptr = reinterpret_cast<int*>(array.data());
    ptr[0] = surfaceSize.width();
    ptr[1] = surfaceSize.height();

    return array;
}

void QWSYellowSurface::setPermanentState(const QByteArray &data)
{
    const int *ptr = reinterpret_cast<const int*>(data.constData());

    const int width = ptr[0];
    const int height = ptr[1];

    img = QImage(width, height, QImage::Format_ARGB32);
    img.fill(qRgba(255,255,31,127));
}

void QWSYellowSurface::flush(QWidget *widget, const QRegion &region,
                             const QPoint &offset)
{
    Q_UNUSED(offset);

    QWSDisplay *display = QWidget::qwsDisplay();
    QRegion rgn = region;

    if (widget)
        rgn.translate(widget->mapToGlobal(QPoint(0, 0)));

    surfaceSize = region.boundingRect().size();

    const int id = winId();
    display->requestRegion(id, key(), permanentState(), rgn);
    display->setAltitude(id, 1, true);
    display->repaintRegion(id, 0, false, rgn);

    ::usleep(500 * delay);
    display->requestRegion(id, key(), permanentState(), QRegion());
    ::usleep(500 * delay);
}

#endif // QT_NO_PAINT_DEBUG

#ifndef QT_NO_DIRECTPAINTER

static inline QScreen *getPrimaryScreen()
{
    QScreen *screen = QScreen::instance();
    if (!screen->base()) {
        QList<QScreen*> subScreens = screen->subScreens();
        if (subScreens.size() < 1)
            return 0;
        screen = subScreens.at(0);
    }
    return screen;
}

QWSDirectPainterSurface::QWSDirectPainterSurface(bool isClient,
                                                 QDirectPainter::SurfaceFlag flags)
    : QWSWindowSurface(), flushingRegionEvents(false)
{
    setSurfaceFlags(Opaque);
    synchronous = (flags == QDirectPainter::ReservedSynchronous);

    if (isClient) {
        setWinId(QWidget::qwsDisplay()->takeId());
        QWidget::qwsDisplay()->nameRegion(winId(),
                                          QLatin1String("QDirectPainter reserved space"),
                                          QLatin1String("reserved"));
    } else {
        setWinId(0);
    }

    _screen = QScreen::instance();
    if (!_screen->base()) {
        QList<QScreen*> subScreens = _screen->subScreens();
        if (subScreens.size() < 1)
            _screen = 0;
        else
            _screen = subScreens.at(0);
    }
}

QWSDirectPainterSurface::~QWSDirectPainterSurface()
{
    if (winId() && QWSDisplay::instance()) // make sure not in QApplication destructor
        QWidget::qwsDisplay()->destroyRegion(winId());
}

void QWSDirectPainterSurface::setRegion(const QRegion &region)
{
    QRegion reg = region;

    if (_screen->isTransformed()) {
        const QSize devSize(_screen->deviceWidth(), _screen->deviceHeight());
        reg = _screen->mapFromDevice(region, devSize);
    }

    const int id = winId();
    QWidget::qwsDisplay()->requestRegion(id, key(), permanentState(), reg);
#ifndef QT_NO_QWS_MULTIPROCESS
    if (synchronous)
        QWSDisplay::instance()->d->waitForRegionAck(id);
#endif
}

void QWSDirectPainterSurface::flush(QWidget *, const QRegion &r, const QPoint &)
{
    QWSDisplay::instance()->repaintRegion(winId(), 0, true, r);
}

QByteArray QWSDirectPainterSurface::permanentState() const
{
    QByteArray res;
    if (isRegionReserved())
        res.append( 'r');
    return res;
}

void QWSDirectPainterSurface::setPermanentState(const QByteArray &ba)
{
    if (ba.size() > 0 && ba.at(0) == 'r')
        setReserved();
    setSurfaceFlags(surfaceFlags() | Opaque);
}

void QWSDirectPainterSurface::beginPaint(const QRegion &region)
{
    QWSWindowSurface::beginPaint(region);
#ifndef QT_NO_QWS_MULTIPROCESS
    if (!synchronous) {
        flushingRegionEvents = true;
        QWSDisplay::instance()->d->waitForRegionEvents(winId());
        flushingRegionEvents = false;
    }
#endif
}

bool QWSDirectPainterSurface::lock(int timeout)
{
    Q_UNUSED(timeout);
    if (QApplication::type() == QApplication::GuiClient)
        QWSDisplay::grab(true);
    return true;
}

void QWSDirectPainterSurface::unlock()
{
    if (QApplication::type() == QApplication::GuiClient)
        QWSDisplay::ungrab();
}

#endif // QT_NO_DIRECTPAINTER