qdirectpainter_qws.cpp

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#include "qdirectpainter_qws.h"

#include "qscreen_qws.h"
#include "private/qobject_p.h"
#include "private/qapplication_p.h"
#include "qwsdisplay_qws.h"
#include "qwidget.h"
#include "qimage.h"
#include <qwsevent_qws.h>
#include <private/qwindowsurface_qws_p.h>
#include <private/qwsdisplay_qws_p.h>

QT_BEGIN_NAMESPACE

#ifdef Q_WS_QWS
#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;
}

static inline QSize screenS()
{
    QScreen *screen = getPrimaryScreen();
    if (!screen)
        return QSize();
    return QSize(screen->width(), screen->height());
}

static inline QSize devS()
{
    QScreen *screen = getPrimaryScreen();
    if (!screen)
        return QSize();
    return QSize(screen->deviceWidth(), screen->deviceHeight());
}


class QDirectPainterPrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QDirectPainter);
public:

    QDirectPainterPrivate() : surface(0), seenRegion(false) {}

    ~QDirectPainterPrivate() {
        if (QPaintDevice::qwsDisplay()) { // make sure not in QApplication destructor
            qApp->d_func()->directPainters->remove(surface->windowId());
            surface->setGeometry(QRect());
        }
        delete surface;
    }

    QWSDirectPainterSurface *surface;
    QRegion requested_region;

    static QDirectPainter *staticPainter;
    bool seenRegion;
};

QDirectPainter *QDirectPainterPrivate::staticPainter = 0;

void qt_directpainter_region(QDirectPainter *dp, const QRegion &alloc, int type)
{
    QDirectPainterPrivate *d = dp->d_func();

    QRegion r = alloc;
    QScreen *screen = d->surface->screen();
    if (screen->isTransformed()) {
        const QSize screenSize(screen->width(), screen->height());
        r = screen->mapToDevice(r, screenSize);
    }
    if (type == QWSRegionEvent::Allocation) {
        d->surface->setClipRegion(alloc);
        d->seenRegion = true;
        if (dp != QDirectPainterPrivate::staticPainter) {
            if (!d->surface->flushingRegionEvents) // recursion guard
                dp->regionChanged(r);
        }
    }
}

#ifndef QT_NO_QWSEMBEDWIDGET
void qt_directpainter_embedevent(QDirectPainter *dp, const QWSEmbedEvent *event)
{
    if (event->type | QWSEmbedEvent::Region) {
        QScreen *screen = dp->d_func()->surface->screen();
        QRegion r = event->region;
        if (screen->isTransformed()) {
            const QSize screenSize(screen->width(), screen->height());
            r = screen->mapToDevice(r, screenSize);
        }
        dp->setRegion(r);
    }
}
#endif

QDirectPainter::QDirectPainter(QObject *parent, SurfaceFlag flag)
    :QObject(*new QDirectPainterPrivate, parent)
{
    Q_D(QDirectPainter);
    d->surface = new QWSDirectPainterSurface(true, flag);

    if (flag != NonReserved)
        d->surface->setReserved();

    QApplicationPrivate *ad = qApp->d_func();
    if (!ad->directPainters)
        ad->directPainters = new QMap<WId, QDirectPainter*>;
    ad->directPainters->insert(d->surface->windowId(), this);
}

QDirectPainter::~QDirectPainter()
{
    /* should not be necessary
    if (this == QDirectPainterPrivate::staticPainter)
        QDirectPainterPrivate::staticPainter = 0;
    */
}

void QDirectPainter::setGeometry(const QRect &rect)
{
    setRegion(rect);
}

QRect QDirectPainter::geometry() const
{
    Q_D(const QDirectPainter);
    return d->requested_region.boundingRect();
}

void QDirectPainter::setRegion(const QRegion &region)
{
    Q_D(QDirectPainter);
    d->requested_region = region;

    const QScreen *screen = d->surface->screen();
    if (screen->isTransformed()) {
        const QSize devSize(screen->deviceWidth(), screen->deviceHeight());
        const QRegion r = screen->mapFromDevice(region, devSize);
        d->surface->setRegion(r);
    } else {
        d->surface->setRegion(region);
    }
}

QRegion QDirectPainter::requestedRegion() const
{
    Q_D(const QDirectPainter);
    return d->requested_region;
}

QRegion QDirectPainter::allocatedRegion() const
{
    Q_D(const QDirectPainter);
    const QScreen *screen = d->surface->screen();
    if (screen->isTransformed()) {
        const QSize screenSize(screen->width(), screen->height());
        return screen->mapToDevice(d->surface->region(), screenSize);
    } else {
        return d->surface->region();
    }
}

WId QDirectPainter::winId() const
{
    Q_D(const QDirectPainter);
    return d->surface->windowId();
}

void QDirectPainter::regionChanged(const QRegion &region)
{
    Q_UNUSED(region);
}

void QDirectPainter::startPainting(bool lockDisplay)
{
    Q_D(QDirectPainter);
    d->surface->setLocking(lockDisplay);

    const QScreen *screen = d->surface->screen();
    if (screen->isTransformed()) {
        const QSize devSize(screen->deviceWidth(), screen->deviceHeight());
        const QRegion r = screen->mapFromDevice(d->surface->region(), devSize);
        d->surface->beginPaint(r);
    } else {
        d->surface->beginPaint(d->surface->region());
    }
}

void QDirectPainter::endPainting()
{
    Q_D(QDirectPainter);

    const QScreen *screen = d->surface->screen();
    if (screen->isTransformed()) {
        const QSize devSize(screen->deviceWidth(), screen->deviceHeight());
        const QRegion r = screen->mapFromDevice(d->surface->region(), devSize);
        d->surface->endPaint(r);
    } else {
        d->surface->endPaint(d->surface->region());
    }
}

void QDirectPainter::endPainting(const QRegion &region)
{
    endPainting();
    flush(region);
}

void QDirectPainter::flush(const QRegion &region)
{
    Q_D(QDirectPainter);

    const QScreen *screen = d->surface->screen();
    if (screen->isTransformed()) {
        const QSize devSize(screen->deviceWidth(), screen->deviceHeight());
        const QRegion r = screen->mapFromDevice(region, devSize);
        d->surface->flush(0, r, QPoint());
    } else {
        d->surface->flush(0, region, QPoint());
    }
}

void QDirectPainter::raise()
{
    QWidget::qwsDisplay()->setAltitude(winId(),QWSChangeAltitudeCommand::Raise);
}

void QDirectPainter::lower()
{
    QWidget::qwsDisplay()->setAltitude(winId(),QWSChangeAltitudeCommand::Lower);
}


QRegion QDirectPainter::reserveRegion(const QRegion &reg)
{
    if (!QDirectPainterPrivate::staticPainter)
        QDirectPainterPrivate::staticPainter = new QDirectPainter(qApp, ReservedSynchronous);

    QDirectPainter *dp = QDirectPainterPrivate::staticPainter;
    dp->setRegion(reg);

    return dp->allocatedRegion();
}

uchar* QDirectPainter::frameBuffer()
{
    QScreen *screen = getPrimaryScreen();
    if (!screen)
        return 0;
    return screen->base();
}

QRegion QDirectPainter::reservedRegion()
{
    return QDirectPainterPrivate::staticPainter
        ? QDirectPainterPrivate::staticPainter->allocatedRegion() : QRegion();
}

int QDirectPainter::screenDepth()
{
    QScreen *screen = getPrimaryScreen();
    if (!screen)
        return 0;
    return screen->depth();
}

int QDirectPainter::screenWidth()
{
    QScreen *screen = getPrimaryScreen();
    if (!screen)
        return 0;
    return screen->deviceWidth();
}

int QDirectPainter::screenHeight()
{
    QScreen *screen = getPrimaryScreen();
    if (!screen)
        return 0;
    return screen->deviceHeight();
}

int QDirectPainter::linestep()
{
    QScreen *screen = getPrimaryScreen();
    if (!screen)
        return 0;
    return screen->linestep();
}


void QDirectPainter::lock()
{
    QWSDisplay::grab(true);
}
void QDirectPainter::unlock()
{
    QWSDisplay::ungrab();
}

#endif //QT_NO_DIRECTPAINTER

#endif

QT_END_NAMESPACE