QVFbScreen Class Reference

The QVFbScreen class implements a screen driver for the virtual framebuffer. More...

#include <qscreenvfb_qws.h>

Inheritance diagram for QVFbScreen:

Public Functions
virtual void	blank (bool)
	Prevents the screen driver form displaying any content on the screen. More...
virtual bool	connect (const QString &displaySpec)
	Reimplemented Function More...
int	depth () const
	Reimplement in subclass to return current depth of the screen. More...
virtual void	disconnect ()
	Reimplemented Function More...
QImage::Format	format () const
	Reimplement in subclass to return the image format which corresponds to the screen format. More...
QRect	geometry () const
	Reimplement in subclass to return the pixel geometry of the screen. More...
virtual bool	initDevice ()
	Reimplemented Function More...
QSize	physicalSize () const
	Reimplement this function in subclass to return the physical size of the screen. More...
	QVFbScreen (int id)
	QVFbScreen (int display_id)
	Constructs a QVNCScreen object. More...
virtual void	restore ()
	Reimplemented Function More...
virtual void	save ()
	Reimplemented Function More...
QImage *	screenImage ()
void	setDirty (const QRect &rect)
	Marks the given rectangle as dirty. More...
virtual void	setDirty (const QRect &r)
	Reimplemented Function More...
virtual void	setMode (int nw, int nh, int nd)
	Reimplemented Function More...
virtual void	shutdownDevice ()
	Reimplemented Function More...
	~QVFbScreen ()
virtual	~QVFbScreen ()
	Destroys this QVFbScreen object. More...
Public Functions inherited from QPlatformScreen
virtual QRect	availableGeometry () const
	Reimplement in subclass to return the pixel geometry of the available space This normally is the desktop screen minus the task manager, global menubar etc. More...
virtual QWidget *	topLevelAt (const QPoint &point) const
	Return the given top level widget for a given position. More...
virtual	~QPlatformScreen ()
Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...
const QObjectList &	children () const
	Returns a list of child objects. More...
bool	connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
bool	disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0)
bool	disconnect (const QObject *receiver, const char *member=0)
void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...
void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...
QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...
virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
virtual bool	eventFilter (QObject *, QEvent *)
	Filters events if this object has been installed as an event filter for the watched object. More...
template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...
template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...
template<typename T >
QList< T >	findChildren (const QRegExp &re) const
bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...
void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...
bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...
void	killTimer (int id)
	Kills the timer with timer identifier, id. More...
virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...
void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...
QString	objectName () const
QObject *	parent () const
	Returns a pointer to the parent object. More...
QVariant	property (const char *name) const
	Returns the value of the object's name property. More...
Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...
void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...
void	setObjectName (const QString &name)
void	setParent (QObject *)
	Makes the object a child of parent. More...
bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...
void	setUserData (uint id, QObjectUserData *data)
bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...
int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...
QThread *	thread () const
	Returns the thread in which the object lives. More...
QObjectUserData *	userData (uint id) const
virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...
Public Functions inherited from QScreen
virtual int	alloc (unsigned int, unsigned int, unsigned int)
	Returns the index in the screen's palette which is the closest match to the given RGB value (red, green, blue). More...
uchar *	base () const
	Returns a pointer to the beginning of the framebuffer. More...
virtual void	blit (const QImage &img, const QPoint &topLeft, const QRegion &region)
	Copies the given region in the given image to the point specified by topLeft using device coordinates. More...
void	blit (QWSWindow *bs, const QRegion &clip)
virtual uchar *	cache (int)
ClassId	classId () const
	Returns the class identifier for the screen object. More...
QRgb *	clut ()
	Returns a pointer to the screen's color lookup table (i. More...
int	colorCount ()
	Returns the number of entries in the screen's color lookup table (i. More...
virtual QWSWindowSurface *	createSurface (QWidget *widget) const
	Creates and returns a new window surface for the given widget. More...
virtual QWSWindowSurface *	createSurface (const QString &key) const
	Creates and returns a new window surface matching the given key. More...
int	depth () const
	Returns the depth of the framebuffer, in bits per pixel. More...
int	deviceHeight () const
	Returns the full height of the framebuffer device in pixels. More...
int	deviceWidth () const
	Returns the physical width of the framebuffer device in pixels. More...
virtual void	exposeRegion (QRegion r, int changing)
	This function is called by the Qt for Embedded Linux server whenever a screen update is required. More...
QGraphicsSystem *	graphicsSystem () const
virtual void	haltUpdates ()
int	height () const
	Returns the logical height of the framebuffer in pixels. More...
virtual bool	isInterlaced () const
	Returns true if the display is interlaced (i. More...
virtual bool	isTransformed () const
	Returns true if the screen is transformed (for instance, rotated 90 degrees); otherwise returns false. More...
int	linestep () const
	Returns the length of each scanline of the framebuffer in bytes. More...
virtual QSize	mapFromDevice (const QSize &) const
	Maps the given size from the framebuffer coordinate system to the coordinate space used by the application. More...
virtual QPoint	mapFromDevice (const QPoint &, const QSize &) const
	Maps the given point from the framebuffer coordinate system to the coordinate space used by the application, passing the device's screenSize as argument. More...
virtual QRect	mapFromDevice (const QRect &, const QSize &) const
	Maps the given rectangle from the framebuffer coordinate system to the coordinate space used by the application, passing the device's screenSize as argument. More...
virtual QImage	mapFromDevice (const QImage &) const
	Maps the given image from the framebuffer coordinate system to the coordinate space used by the application. More...
virtual QRegion	mapFromDevice (const QRegion &, const QSize &) const
	Maps the given region from the framebuffer coordinate system to the coordinate space used by the application, passing the device's screenSize as argument. More...
virtual QSize	mapToDevice (const QSize &) const
	Maps the given size from the coordinate space used by the application to the framebuffer coordinate system. More...
virtual QPoint	mapToDevice (const QPoint &, const QSize &) const
	Maps the given point from the coordinate space used by the application to the framebuffer coordinate system, passing the device's screenSize as argument. More...
virtual QRect	mapToDevice (const QRect &, const QSize &) const
	Maps the given rectangle from the coordinate space used by the application to the framebuffer coordinate system, passing the device's screenSize as argument. More...
virtual QImage	mapToDevice (const QImage &) const
	Maps the given image from the coordinate space used by the application to the framebuffer coordinate system. More...
virtual QRegion	mapToDevice (const QRegion &, const QSize &) const
	Maps the given region from the coordinate space used by the application to the framebuffer coordinate system, passing the device's screenSize as argument. More...
virtual int	memoryNeeded (const QString &)
QT_DEPRECATED int	numCols ()
QPoint	offset () const
	Returns the logical offset of the screen, i. More...
virtual bool	onCard (const unsigned char *) const
	Returns true if the specified buffer is within the graphics card's memory; otherwise returns false (i.e. More...
virtual bool	onCard (const unsigned char *, ulong &out_offset) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.If the specified buffer is within the graphics card's memory, this function stores the offset from the start of graphics card memory (in bytes), in the location specified by the offset parameter. More...
int	physicalHeight () const
	Returns the physical height of the screen in millimeters. More...
int	physicalWidth () const
	Returns the physical width of the screen in millimeters. More...
QImage::Format	pixelFormat () const
	Returns the pixel format of the screen, or QImage::Format_Invalid if the pixel format is not a supported image format. More...
PixelType	pixelType () const
	Returns the pixel storage format of the screen. More...
QPixmapDataFactory *	pixmapDataFactory () const
virtual int	pixmapDepth () const
	Returns the preferred depth for pixmaps, in bits per pixel. More...
virtual int	pixmapLinestepAlignment ()
	Returns the value (in bits) to which individual scanlines of pixmaps held in the graphics card's memory, should be aligned. More...
virtual int	pixmapOffsetAlignment ()
	Returns the value (in bits) to which the start address of pixmaps held in the graphics card's memory, should be aligned. More...
	QScreen (int display_id, ClassId classId)
	Constructs a new screen driver. More...
	QScreen (int display_id)
	Constructs a new screen driver. More...
virtual QRegion	region () const
	Returns the region covered by this screen driver. More...
virtual void	resumeUpdates ()
int	screenSize () const
	Returns the size of the screen in bytes. More...
virtual void	set (unsigned int, unsigned int, unsigned int, unsigned int)
void	setOffset (const QPoint &p)
virtual int	sharedRamSize (void *)
virtual void	solidFill (const QColor &color, const QRegion &region)
	Fills the given region of the screen with the specified color. More...
int	subScreenIndexAt (const QPoint &p) const
	Returns the index of the subscreen at the given position; returns -1 if no screen is found. More...
virtual QList< QScreen * >	subScreens () const
virtual bool	supportsDepth (int) const
	Returns true if the screen supports the specified color depth; otherwise returns false. More...
int	totalSize () const
	Returns the size of the available graphics card memory (including the screen) in bytes. More...
virtual int	transformOrientation () const
	Returns the current rotation as an integer value. More...
virtual void	uncache (uchar *)
int	width () const
	Returns the logical width of the framebuffer in pixels. More...
virtual	~QScreen ()
	Destroys this screen driver. More...

Properties
QVFbScreenPrivate *	d_ptr

Additional Inherited Members
Public Types inherited from QScreen
enum	ClassId {   LinuxFBClass, TransformedClass, VNCClass, MultiClass,   VFbClass, DirectFBClass, SvgalibClass, ProxyClass,   GLClass, IntfbClass, CustomClass = 1024 }
	This enum defines the class identifiers for the known screen subclasses. More...
enum	PixelType { NormalPixel, BGRPixel }
	This enum describes the pixel storage format of the screen, i. More...
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...
Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...
Static Public Functions inherited from QPlatformScreen
static QPlatformScreen *	platformScreenForWidget (const QWidget *widget)
Static Public Functions inherited from QObject
static bool	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...
static bool	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
static bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
	Disconnects signal in object sender from method in object receiver. More...
static bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
static uint	registerUserData ()
static QString	tr (const char *sourceText, const char *comment=0, int n=-1)
static QString	trUtf8 (const char *sourceText, const char *comment=0, int n=-1)
Static Public Functions inherited from QScreen
static QScreen *	instance ()
	Returns a pointer to the application's QScreen instance. More...
Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...
Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...
virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...
virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...
virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...
	QObject (QObjectPrivate &dd, QObject *parent=0)
int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...
int	senderSignalIndex () const
virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...
Protected Functions inherited from QScreen
void	setGraphicsSystem (QGraphicsSystem *system)
void	setPixelFormat (QImage::Format format)
	Sets the screen's pixel format to format. More...
void	setPixmapDataFactory (QPixmapDataFactory *factory)
Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr
Protected Variables inherited from QScreen
int	d
	the pixel depth More...
uchar *	data
	points to the first visible pixel in the frame buffer. More...
int	dh
	the device height More...
int	displayId
int	dw
	the device width More...
QPoolEntry *	entries
int *	entryp
bool	grayscale
	the gray scale screen mode flag More...
int	h
	the logical height of the screen. More...
unsigned int *	lowest
int	lstep
	the number of bytes representing a line in the frame buffer. More...
int	mapsize
	the total number of bytes in the frame buffer More...
int	physHeight
	the physical height of the screen in millimeters. More...
int	physWidth
	the physical width of the screen in millimeters. More...
PixelType	pixeltype
	set to BGRPixel More...
QRgb	screenclut [256]
	the color table More...
int	screencols
	the number of entries in the color table More...
int	size
	the number of bytes in the visible region of the frame buffer More...
int	w
	the logical width of the screen. More...
Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject
Static Protected Variables inherited from QScreen
static ClearCacheFunc	clearCacheFunc = 0
Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()
T *	qobject_cast (QObject *object)
	QObjectList
void *	qt_find_obj_child (QObject *parent, const char *type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...
Related Functions inherited from QScreen
void	setTransformation (int transformation, int screenNo)
	Here it is. More...

Detailed Description

The QVFbScreen class implements a screen driver for the virtual framebuffer.

Warning

This function is not part of the public interface.

Note that this class is only available in Qt for Embedded Linux. Custom screen drivers can be added by subclassing the QScreenDriverPlugin class, using the QScreenDriverFactory class to dynamically load the driver into the application, but there should only be one screen object per application.

The Qt for Embedded Linux platform provides a The Virtual Framebuffer{virtual framebuffer} for development and debugging; the virtual framebuffer allows Qt for Embedded Linux applications to be developed on a desktop machine, without switching between consoles and X11.

See also

QScreen, QScreenDriverPlugin, {Running Applications}

Definition at line 58 of file qscreenvfb_qws.h.

Constructors and Destructors

QVFbScreen() [1/2]

QVFbScreen::QVFbScreen ( int  displayId )

explicit

Constructs a QVNCScreen object.

The displayId argument identifies the Qt for Embedded Linux server to connect to.

Definition at line 181 of file qscreenvfb_qws.cpp.

Referenced by QVFbScreenPrivate::disconnect().

    : QScreen(display_id, VFbClass), d_ptr(new QVFbScreenPrivate)
{
    d_ptr->shmrgn = 0;
    d_ptr->hdr = 0;
    data = 0;
}

~QVFbScreen() [1/2]

QVFbScreen::~QVFbScreen ( )

virtual

Destroys this QVFbScreen object.

Definition at line 192 of file qscreenvfb_qws.cpp.

Referenced by QVFbScreenPrivate::disconnect().

{
    delete d_ptr;
}

QVFbScreen() [2/2]

QVFbScreen::QVFbScreen

(

int

id

)

~QVFbScreen() [2/2]

QVFbScreen::~QVFbScreen

(

)

Functions

blank()

void QVFbScreen::blank ( bool  on )

virtual

Prevents the screen driver form displaying any content on the screen.

Note that the default implementation does nothing.

Reimplement this function to prevent the screen driver from displaying any contents on the screen if on is true; otherwise the contents is expected to be shown.

See also

blit()

Reimplemented from QScreen.

Definition at line 443 of file qscreenvfb_qws.cpp.

{
    d_ptr->blank = on;
    setBrightness(connected->d_ptr->brightness);
}

connect()

bool QVFbScreen::connect ( const QString &  displaySpec )

virtual

Reimplemented Function

Implements QScreen.

Definition at line 199 of file qscreenvfb_qws.cpp.

{
    QStringList displayArgs = displaySpec.split(QLatin1Char(':'));
    if (displayArgs.contains(QLatin1String("Gray")))
        grayscale = true;

    key_t key = ftok(QT_VFB_MOUSE_PIPE(displayId).toLocal8Bit(), 'b');

    if (key == -1)
        return false;

#if Q_BYTE_ORDER == Q_BIG_ENDIAN
#ifndef QT_QWS_FRAMEBUFFER_LITTLE_ENDIAN
    if (displayArgs.contains(QLatin1String("littleendian")))
#endif
        QScreen::setFrameBufferLittleEndian(true);
#endif

    int shmId = shmget(key, 0, 0);
    if (shmId != -1)
        d_ptr->shmrgn = (unsigned char *)shmat(shmId, 0, 0);
    else
        return false;

    if ((long)d_ptr->shmrgn == -1 || d_ptr->shmrgn == 0) {
        qDebug("No shmrgn %ld", (long)d_ptr->shmrgn);
        return false;
    }

    d_ptr->hdr = (QVFbHeader *)d_ptr->shmrgn;
    data = d_ptr->shmrgn + d_ptr->hdr->dataoffset;

    dw = w = d_ptr->hdr->width;
    dh = h = d_ptr->hdr->height;
    d = d_ptr->hdr->depth;

    switch (d) {
    case 1:
        setPixelFormat(QImage::Format_Mono);
        break;
    case 8:
        setPixelFormat(QImage::Format_Indexed8);
        break;
    case 12:
        setPixelFormat(QImage::Format_RGB444);
        break;
    case 15:
        setPixelFormat(QImage::Format_RGB555);
        break;
    case 16:
        setPixelFormat(QImage::Format_RGB16);
        break;
    case 18:
        setPixelFormat(QImage::Format_RGB666);
        break;
    case 24:
        setPixelFormat(QImage::Format_RGB888);
        break;
    case 32:
        setPixelFormat(QImage::Format_ARGB32_Premultiplied);
        break;
    }

    lstep = d_ptr->hdr->linestep;

    // Handle display physical size spec.
    int dimIdxW = -1;
    int dimIdxH = -1;
    for (int i = 0; i < displayArgs.size(); ++i) {
        if (displayArgs.at(i).startsWith(QLatin1String("mmWidth"))) {
            dimIdxW = i;
            break;
        }
    }
    for (int i = 0; i < displayArgs.size(); ++i) {
        if (displayArgs.at(i).startsWith(QLatin1String("mmHeight"))) {
            dimIdxH = i;
            break;
        }
    }
    if (dimIdxW >= 0) {
        bool ok;
        int pos = 7;
        if (displayArgs.at(dimIdxW).at(pos) == QLatin1Char('='))
            ++pos;
        int pw = displayArgs.at(dimIdxW).mid(pos).toInt(&ok);
        if (ok) {
            physWidth = pw;
            if (dimIdxH < 0)
                physHeight = dh*physWidth/dw;
        }
    }
    if (dimIdxH >= 0) {
        bool ok;
        int pos = 8;
        if (displayArgs.at(dimIdxH).at(pos) == QLatin1Char('='))
            ++pos;
        int ph = displayArgs.at(dimIdxH).mid(pos).toInt(&ok);
        if (ok) {
            physHeight = ph;
            if (dimIdxW < 0)
                physWidth = dw*physHeight/dh;
        }
    }
    if (dimIdxW < 0 && dimIdxH < 0) {
        const int dpi = 72;
        physWidth = qRound(dw * 25.4 / dpi);
        physHeight = qRound(dh * 25.4 / dpi);
    }

    qDebug("Connected to VFB server %s: %d x %d x %d %dx%dmm (%dx%ddpi)", displaySpec.toLatin1().data(),
        w, h, d, physWidth, physHeight, qRound(dw*25.4/physWidth), qRound(dh*25.4/physHeight) );

    size = lstep * h;
    mapsize = size;
    screencols = d_ptr->hdr->numcols;
    memcpy(screenclut, d_ptr->hdr->clut, sizeof(QRgb) * screencols);

    connected = this;

    if (qgetenv("QT_QVFB_BGR").toInt())
        pixeltype = BGRPixel;

    return true;
}

depth()

int QVFbScreen::depth ( ) const

virtual

Reimplement in subclass to return current depth of the screen.

Implements QPlatformScreen.

Definition at line 384 of file qvfbintegration.cpp.

{
    return d_ptr->depth();
}

disconnect()

void QVFbScreen::disconnect ( )

virtual

Reimplemented Function

Implements QScreen.

Definition at line 325 of file qscreenvfb_qws.cpp.

{
    connected = 0;
    if ((long)d_ptr->shmrgn != -1 && d_ptr->shmrgn) {
        if (qApp->type() == QApplication::GuiServer && d_ptr->hdr->dataoffset >= (int)sizeof(QVFbHeader)) {
            d_ptr->hdr->serverVersion = 0;
        }
        shmdt((char*)d_ptr->shmrgn);
    }
}

format()

QImage::Format QVFbScreen::format ( ) const

virtual

Reimplement in subclass to return the image format which corresponds to the screen format.

Implements QPlatformScreen.

Definition at line 389 of file qvfbintegration.cpp.

{
    return d_ptr->format();
}

geometry()

QRect QVFbScreen::geometry ( ) const

virtual

Reimplement in subclass to return the pixel geometry of the screen.

Implements QPlatformScreen.

Definition at line 379 of file qvfbintegration.cpp.

                                 {
    return QRect(QPoint(), d_ptr->screenSize());
}

initDevice()

bool QVFbScreen::initDevice ( )

virtual

Reimplemented Function

Implements QScreen.

Definition at line 336 of file qscreenvfb_qws.cpp.

{
#ifndef QT_NO_QWS_MOUSE_QVFB
    const QString mouseDev = QT_VFB_MOUSE_PIPE(displayId);
    d_ptr->mouse = new QVFbMouseHandler(QLatin1String("QVFbMouse"), mouseDev);
    qwsServer->setDefaultMouse("None");
    if (d_ptr->mouse)
        d_ptr->mouse->setScreen(this);
#endif

#if !defined(QT_NO_QWS_KBD_QVFB) && !defined(QT_NO_QWS_KEYBOARD)
    const QString keyboardDev = QT_VFB_KEYBOARD_PIPE(displayId);
    d_ptr->keyboard = new QVFbKeyboardHandler(keyboardDev);
    qwsServer->setDefaultKeyboard("None");
#endif

    if (d_ptr->hdr->dataoffset >= (int)sizeof(QVFbHeader))
        d_ptr->hdr->serverVersion = QT_VERSION;

    if(d==8) {
        screencols=256;
        if (grayscale) {
            // Build grayscale palette
            for(int loopc=0;loopc<256;loopc++) {
                screenclut[loopc]=qRgb(loopc,loopc,loopc);
            }
        } else {
            // 6x6x6 216 color cube
            int idx = 0;
            for(int ir = 0x0; ir <= 0xff; ir+=0x33) {
                for(int ig = 0x0; ig <= 0xff; ig+=0x33) {
                    for(int ib = 0x0; ib <= 0xff; ib+=0x33) {
                        screenclut[idx]=qRgb(ir, ig, ib);
                        idx++;
                    }
                }
            }
            screencols=idx;
        }
        memcpy(d_ptr->hdr->clut, screenclut, sizeof(QRgb) * screencols);
        d_ptr->hdr->numcols = screencols;
    } else if (d == 4) {
        int val = 0;
        for (int idx = 0; idx < 16; idx++, val += 17) {
            screenclut[idx] = qRgb(val, val, val);
        }
        screencols = 16;
        memcpy(d_ptr->hdr->clut, screenclut, sizeof(QRgb) * screencols);
        d_ptr->hdr->numcols = screencols;
    } else if (d == 1) {
        screencols = 2;
        screenclut[1] = qRgb(0xff, 0xff, 0xff);
        screenclut[0] = qRgb(0, 0, 0);
        memcpy(d_ptr->hdr->clut, screenclut, sizeof(QRgb) * screencols);
        d_ptr->hdr->numcols = screencols;
    }

#ifndef QT_NO_QWS_CURSOR
    QScreenCursor::initSoftwareCursor();
#endif
    return true;
}

physicalSize()

QSize QVFbScreen::physicalSize ( ) const

virtual

Reimplement this function in subclass to return the physical size of the screen.

This function is used by QFont to convert point sizes to pixel sizes.

The default implementation takes the pixel size of the screen, considers a resolution of 100 dots per inch, and returns the calculated physical size. A device with a screen that has different resolutions will need to be supported by a suitable reimplementation of this function.

Reimplemented from QPlatformScreen.

Definition at line 394 of file qvfbintegration.cpp.

                                     {
    return (d_ptr->screenSize()*254)/720;
}

restore()

void QVFbScreen::restore ( )

virtual

Reimplemented Function

Reimplemented from QScreen.

Definition at line 416 of file qscreenvfb_qws.cpp.

{
}

save()

void QVFbScreen::save ( )

virtual

Reimplemented Function

Reimplemented from QScreen.

Definition at line 410 of file qscreenvfb_qws.cpp.

{
    // nothing to do.
}

screenImage()

QImage * QVFbScreen::screenImage

(

)

Definition at line 408 of file qvfbintegration.cpp.

Referenced by QVFbWindowSurface::paintDevice().

{
    return d_ptr->screenImage();
}

setDirty() [1/2]

void QVFbScreen::setDirty ( const QRect &  rectangle )

virtual

Marks the given rectangle as dirty.

Note that the default implementation does nothing; reimplement this function to indicate that the given rectangle has been altered.

Reimplemented from QScreen.

setDirty() [2/2]

void QVFbScreen::setDirty ( const QRect &  r )

virtual

Reimplemented Function

Reimplemented from QScreen.

Definition at line 419 of file qscreenvfb_qws.cpp.

Referenced by QVFbScreenPrivate::disconnect(), QVFbWindowSurface::flush(), and setDirty().

{
    const QRect r = rect.translated(-offset());
    d_ptr->hdr->dirty = true;
    d_ptr->hdr->update = d_ptr->hdr->update.united(r);
}

setMode()

void QVFbScreen::setMode ( int  nw, int  nh, int  nd  )

virtual

Reimplemented Function

Implements QScreen.

Definition at line 403 of file qscreenvfb_qws.cpp.

{
}

shutdownDevice()

void QVFbScreen::shutdownDevice ( )

virtual

Reimplemented Function

Reimplemented from QScreen.

Definition at line 399 of file qscreenvfb_qws.cpp.

{
}

Properties

d_ptr

QVFbScreenPrivate * QVFbScreen::d_ptr

private

Definition at line 77 of file qscreenvfb_qws.h.

Referenced by blank(), connect(), disconnect(), initDevice(), QVFbScreen(), setDirty(), and ~QVFbScreen().

---

The documentation for this class was generated from the following files:

• /src/gui/embedded/qscreenvfb_qws.h
• /src/plugins/platforms/qvfb/qvfbintegration.h
• /src/gui/embedded/qscreenvfb_qws.cpp
• /src/plugins/platforms/qvfb/qvfbintegration.cpp