QRasterWindowSurface Class Reference

#include <qwindowsurface_raster_p.h>

Inheritance diagram for QRasterWindowSurface:

Public Functions
void	beginPaint (const QRegion &rgn)
	This function is called before painting onto the surface begins, with the region in which the painting will occur. More...
WindowSurfaceFeatures	features () const
void	flush (QWidget *widget, const QRegion &region, const QPoint &offset)
	Flushes the given region from the specified widget onto the screen. More...
QPaintDevice *	paintDevice ()
	Implement this function to return the appropriate paint device. More...
	QRasterWindowSurface (QWidget *widget, bool setDefaultSurface=true)
bool	scroll (const QRegion &area, int dx, int dy)
	Scrolls the given area dx pixels to the right and dy downward; both dx and dy may be negative. More...
void	setGeometry (const QRect &rect)
	Sets the currently allocated area to be the given rect. More...
	~QRasterWindowSurface ()
Public Functions inherited from QWindowSurface
virtual QImage *	buffer (const QWidget *widget)
	Returns a QImage pointer which represents the actual buffer the widget is drawn into or 0 if this is unavailable. More...
virtual void	endPaint (const QRegion &)
	This function is called after painting onto the surface has ended, with the region in which the painting was performed. More...
QRect	geometry () const
	Returns the currently allocated area on the screen. More...
virtual QPixmap	grabWidget (const QWidget *widget, const QRect &rectangle=QRect()) const
	Returns a QPixmap generated from the part of the backing store corresponding to widget. More...
bool	hasFeature (WindowSurfaceFeature feature) const
virtual QPoint	offset (const QWidget *widget) const
	Returns the offset of widget in the coordinates of this window surface. More...
	QWindowSurface (QWidget *window, bool setDefaultSurface=true)
	Constructs an empty surface for the given top-level window. More...
QRect	rect (const QWidget *widget) const
	Returns the rectangle for widget in the coordinates of this window surface. More...
void	setStaticContents (const QRegion &region)
QRegion	staticContents () const
QWidget *	window () const
	Returns a pointer to the top-level window associated with this surface. More...
virtual	~QWindowSurface ()
	Destroys this surface. More...

Private Functions
void	prepareBuffer (QImage::Format format, QWidget *widget)
void	syncX ()

Properties
QScopedPointer< QRasterWindowSurfacePrivate >	d_ptr

Additional Inherited Members
Public Types inherited from QWindowSurface
enum	WindowSurfaceFeature { PartialUpdates = 0x00000001, PreservedContents = 0x00000002, StaticContents = 0x00000004, AllFeatures = 0xffffffff }
Protected Functions inherited from QWindowSurface
bool	hasStaticContents () const

Detailed Description

Definition at line 101 of file qwindowsurface_raster_p.h.

Constructors and Destructors

QRasterWindowSurface()

QRasterWindowSurface::QRasterWindowSurface	(	QWidget *	widget,
		bool	setDefaultSurface = true
	)

Definition at line 91 of file qwindowsurface_raster.cpp.

    : QWindowSurface(window, setDefaultSurface), d_ptr(new QRasterWindowSurfacePrivate)
{
#ifdef Q_WS_X11
    d_ptr->gc = XCreateGC(X11->display, window->handle(), 0, 0);
#ifndef QT_NO_XRENDER
    d_ptr->translucentBackground = X11->use_xrender
        && window->x11Info().depth() == 32;
#endif
#ifndef QT_NO_MITSHM
    d_ptr->needsSync = false;
#endif
#endif
    d_ptr->image = 0;
    d_ptr->inSetGeometry = false;

#ifdef QT_MAC_USE_COCOA
    needsFlush = false;
    regionToFlush = QRegion();
#endif // QT_MAC_USE_COCOA
}

~QRasterWindowSurface()

QRasterWindowSurface::~QRasterWindowSurface

(

)

Definition at line 114 of file qwindowsurface_raster.cpp.

{
#ifdef Q_WS_X11
    XFreeGC(X11->display, d_ptr->gc);
#endif
    if (d_ptr->image)
        delete d_ptr->image;
}

Functions

beginPaint()

void QRasterWindowSurface::beginPaint ( const QRegion &  region )

virtual

This function is called before painting onto the surface begins, with the region in which the painting will occur.

See also

endPaint(), paintDevice()

Reimplemented from QWindowSurface.

Reimplemented in QTraceWindowSurface.

Definition at line 140 of file qwindowsurface_raster.cpp.

Referenced by QTraceWindowSurface::beginPaint().

{
#if defined(Q_WS_X11) && !defined(QT_NO_MITSHM)
    syncX();
#endif

#if (defined(Q_WS_X11) && !defined(QT_NO_XRENDER)) || (defined(Q_WS_WIN) && !defined(Q_WS_WINCE))
    if (!qt_widget_private(window())->isOpaque && window()->testAttribute(Qt::WA_TranslucentBackground)) {
#if defined(Q_WS_WIN) && !defined(Q_WS_WINCE)
        if (d_ptr->image->image.format() != QImage::Format_ARGB32_Premultiplied)
            prepareBuffer(QImage::Format_ARGB32_Premultiplied, window());
#endif
        QPainter p(&d_ptr->image->image);
        p.setCompositionMode(QPainter::CompositionMode_Source);
        const QVector<QRect> rects = rgn.rects();
        const QColor blank = Qt::transparent;
        for (QVector<QRect>::const_iterator it = rects.begin(); it != rects.end(); ++it) {
            p.fillRect(*it, blank);
        }
    }
#else
    Q_UNUSED(rgn);
#endif
}

features()

QWindowSurface::WindowSurfaceFeatures QRasterWindowSurface::features ( ) const

virtual

Reimplemented from QWindowSurface.

Definition at line 415 of file qwindowsurface_raster.cpp.

{
    return QWindowSurface::AllFeatures;
}

flush()

void QRasterWindowSurface::flush ( QWidget *  widget, const QRegion &  region, const QPoint &  offset  )

virtual

Flushes the given region from the specified widget onto the screen.

Note that the offset parameter is currently unused.

Implements QWindowSurface.

Definition at line 165 of file qwindowsurface_raster.cpp.

{
    Q_D(QRasterWindowSurface);

    // Not ready for painting yet, bail out. This can happen in
    // QWidget::create_sys()
    if (!d->image || rgn.rectCount() == 0)
        return;

#ifdef Q_WS_WIN
    QRect br = rgn.boundingRect();

#ifndef Q_WS_WINCE
    if (!qt_widget_private(window())->isOpaque
        && window()->testAttribute(Qt::WA_TranslucentBackground)
        && (qt_widget_private(window())->data.window_flags & Qt::FramelessWindowHint))
    {
        QRect r = window()->frameGeometry();
        QPoint frameOffset = qt_widget_private(window())->frameStrut().topLeft();
        QRect dirtyRect = br.translated(offset + frameOffset);

        SIZE size = {r.width(), r.height()};
        POINT ptDst = {r.x(), r.y()};
        POINT ptSrc = {0, 0};
        BLENDFUNCTION blend = {AC_SRC_OVER, 0, (BYTE)(255.0 * window()->windowOpacity()), Q_AC_SRC_ALPHA};
        RECT dirty = {dirtyRect.x(), dirtyRect.y(),
            dirtyRect.x() + dirtyRect.width(), dirtyRect.y() + dirtyRect.height()};
        Q_UPDATELAYEREDWINDOWINFO info = {sizeof(info), NULL, &ptDst, &size, d->image->hdc, &ptSrc, 0, &blend, Q_ULW_ALPHA, &dirty};
        ptrUpdateLayeredWindowIndirect(window()->internalWinId(), &info);
    } else
#endif
    {
        QPoint wOffset = qt_qwidget_data(widget)->wrect.topLeft();

        HDC widget_dc = widget->getDC();

        QRect wbr = br.translated(-wOffset);
        BitBlt(widget_dc, wbr.x(), wbr.y(), wbr.width(), wbr.height(),
               d->image->hdc, br.x() + offset.x(), br.y() + offset.y(), SRCCOPY);
        widget->releaseDC(widget_dc);
    }

#ifndef QT_NO_DEBUG
    static bool flush = !qgetenv("QT_FLUSH_WINDOWSURFACE").isEmpty();
    if (flush) {
        SelectObject(qt_win_display_dc(), GetStockObject(BLACK_BRUSH));
        Rectangle(qt_win_display_dc(), 0, 0, d->image->width() + 2, d->image->height() + 2);
        BitBlt(qt_win_display_dc(), 1, 1, d->image->width(), d->image->height(),
               d->image->hdc, 0, 0, SRCCOPY);
    }
#endif

#endif

#ifdef Q_WS_X11
    extern void *qt_getClipRects(const QRegion &r, int &num); // in qpaintengine_x11.cpp
    extern QWidgetData* qt_widget_data(QWidget *);
    QPoint wOffset = qt_qwidget_data(widget)->wrect.topLeft();

    if (widget->window() != window()) {
        XFreeGC(X11->display, d_ptr->gc);
        d_ptr->gc = XCreateGC(X11->display, widget->handle(), 0, 0);
    }

    QRegion wrgn(rgn);
    if (!wOffset.isNull())
        wrgn.translate(-wOffset);

    if (wrgn.rectCount() != 1) {
        int num;
        XRectangle *rects = (XRectangle *)qt_getClipRects(wrgn, num);
        XSetClipRectangles(X11->display, d_ptr->gc, 0, 0, rects, num, YXBanded);
    }

    QPoint widgetOffset = offset + wOffset;
    QRect clipRect = widget->rect().translated(widgetOffset).intersected(d_ptr->image->image.rect());

    QRect br = rgn.boundingRect().translated(offset).intersected(clipRect);
    QPoint wpos = br.topLeft() - widgetOffset;

#ifndef QT_NO_MITSHM
    if (d_ptr->image->xshmpm) {
        XCopyArea(X11->display, d_ptr->image->xshmpm, widget->handle(), d_ptr->gc,
                  br.x(), br.y(), br.width(), br.height(), wpos.x(), wpos.y());
        d_ptr->needsSync = true;
    } else if (d_ptr->image->xshmimg) {
        XShmPutImage(X11->display, widget->handle(), d_ptr->gc, d_ptr->image->xshmimg,
                     br.x(), br.y(), wpos.x(), wpos.y(), br.width(), br.height(), False);
        d_ptr->needsSync = true;
    } else
#endif
    {
        int depth = widget->x11Info().depth();
        const QImage &src = d->image->image;
        if (src.format() != QImage::Format_RGB32 || depth < 24 || X11->bppForDepth.value(depth) != 32) {
            Q_ASSERT(src.depth() >= 16);
            const QImage sub_src(src.scanLine(br.y()) + br.x() * (uint(src.depth()) / 8),
                                 br.width(), br.height(), src.bytesPerLine(), src.format());
            QX11PixmapData *data = new QX11PixmapData(QPixmapData::PixmapType);
            data->xinfo = widget->x11Info();
            data->fromImage(sub_src, Qt::NoOpaqueDetection);
            QPixmap pm = QPixmap(data);
            XCopyArea(X11->display, pm.handle(), widget->handle(), d_ptr->gc, 0 , 0 , br.width(), br.height(), wpos.x(), wpos.y());
        } else {
            // qpaintengine_x11.cpp
            extern void qt_x11_drawImage(const QRect &rect, const QPoint &pos, const QImage &image, Drawable hd, GC gc, Display *dpy, Visual *visual, int depth);
            qt_x11_drawImage(br, wpos, src, widget->handle(), d_ptr->gc, X11->display, (Visual *)widget->x11Info().visual(), depth);
        }
    }

    if (wrgn.rectCount() != 1)
        XSetClipMask(X11->display, d_ptr->gc, XNone);
#endif // FALCON

#ifdef Q_WS_MAC

    Q_UNUSED(offset);

    // This is mainly done for native components like native "open file" dialog.
    if (widget->testAttribute(Qt::WA_DontShowOnScreen)) {
        return;
    }

#ifdef QT_MAC_USE_COCOA

    this->needsFlush = true;
    this->regionToFlush += rgn;

    // The actual flushing will be processed in [view drawRect:rect]
    qt_mac_setNeedsDisplay(widget);

#else
    // Get a context for the widget.
    CGContextRef context;
    CGrafPtr port = GetWindowPort(qt_mac_window_for(widget));
    QDBeginCGContext(port, &context);
    CGContextRetain(context);
    CGContextSaveGState(context);

    // Flip context.
    CGContextTranslateCTM(context, 0, widget->height());
    CGContextScaleCTM(context, 1, -1);

    // Clip to region.
    const QVector<QRect> &rects = rgn.rects();
    for (int i = 0; i < rects.size(); ++i) {
        const QRect &rect = rects.at(i);
        CGContextAddRect(context, CGRectMake(rect.x(), rect.y(), rect.width(), rect.height()));
    }
    CGContextClip(context);

    QRect r = rgn.boundingRect().intersected(d->image->image.rect());
    const CGRect area = CGRectMake(r.x(), r.y(), r.width(), r.height());
    CGImageRef image = CGBitmapContextCreateImage(d->image->cg);
    CGImageRef subImage = CGImageCreateWithImageInRect(image, area);

    qt_mac_drawCGImage(context, &area, subImage);

    CGImageRelease(subImage);
    CGImageRelease(image);

    QDEndCGContext(port, &context);

    // Restore context.
    CGContextRestoreGState(context);
    CGContextRelease(context);
#endif // QT_MAC_USE_COCOA

#endif // Q_WS_MAC

#ifdef Q_OS_SYMBIAN
    Q_UNUSED(widget);
    Q_UNUSED(rgn);
    Q_UNUSED(offset);
#endif
}

paintDevice()

QPaintDevice * QRasterWindowSurface::paintDevice ( )

virtual

Implement this function to return the appropriate paint device.

Implements QWindowSurface.

Reimplemented in QTraceWindowSurface.

Definition at line 124 of file qwindowsurface_raster.cpp.

Referenced by QTraceWindowSurface::endPaint().

{
    return &d_ptr->image->image;
}

prepareBuffer()

void QRasterWindowSurface::prepareBuffer ( QImage::Format  format, QWidget *  widget  )

private

Definition at line 420 of file qwindowsurface_raster.cpp.

Referenced by beginPaint(), and setGeometry().

{
    Q_D(QRasterWindowSurface);

    int width = window()->width();
    int height = window()->height();
    if (d->image) {
        width = qMax(d->image->width(), width);
        height = qMax(d->image->height(), height);
    }

    if (width == 0 || height == 0) {
        delete d->image;
        d->image = 0;
        return;
    }

    QNativeImage *oldImage = d->image;

    d->image = new QNativeImage(width, height, format, false, widget);

    if (oldImage && d->inSetGeometry && hasStaticContents()) {
        // Make sure we use the const version of bits() (no detach).
        const uchar *src = const_cast<const QImage &>(oldImage->image).bits();
        uchar *dst = d->image->image.bits();

        const int srcBytesPerLine = oldImage->image.bytesPerLine();
        const int dstBytesPerLine = d->image->image.bytesPerLine();
        const int bytesPerPixel = oldImage->image.depth() >> 3;

        QRegion staticRegion(staticContents());
        // Make sure we're inside the boundaries of the old image.
        staticRegion &= QRect(0, 0, oldImage->image.width(), oldImage->image.height());
        const QVector<QRect> &rects = staticRegion.rects();
        const QRect *srcRect = rects.constData();

        // Copy the static content of the old image into the new one.
        int numRectsLeft = rects.size();
        do {
            const int bytesOffset = srcRect->x() * bytesPerPixel;
            const int dy = srcRect->y();

            // Adjust src and dst to point to the right offset.
            const uchar *s = src + dy * srcBytesPerLine + bytesOffset;
            uchar *d = dst + dy * dstBytesPerLine + bytesOffset;
            const int numBytes = srcRect->width() * bytesPerPixel;

            int numScanLinesLeft = srcRect->height();
            do {
                ::memcpy(d, s, numBytes);
                d += dstBytesPerLine;
                s += srcBytesPerLine;
            } while (--numScanLinesLeft);

            ++srcRect;
        } while (--numRectsLeft);
    }

    delete oldImage;
}

scroll()

bool QRasterWindowSurface::scroll ( const QRegion &  area, int  dx, int  dy  )

virtual

Scrolls the given area dx pixels to the right and dy downward; both dx and dy may be negative.

Returns true if the area was scrolled successfully; false otherwise.

Reimplemented from QWindowSurface.

Reimplemented in QTraceWindowSurface.

Definition at line 384 of file qwindowsurface_raster.cpp.

{
#ifdef Q_WS_WIN
    Q_D(QRasterWindowSurface);

    if (!d->image || !d->image->hdc)
        return false;

    QRect rect = area.boundingRect();
    BitBlt(d->image->hdc, rect.x()+dx, rect.y()+dy, rect.width(), rect.height(),
           d->image->hdc, rect.x(), rect.y(), SRCCOPY);

    return true;
#else
    Q_D(QRasterWindowSurface);

    if (!d->image || d->image->image.isNull())
        return false;

#if defined(Q_WS_X11) && !defined(QT_NO_MITSHM)
    syncX();
#endif

    const QVector<QRect> rects = area.rects();
    for (int i = 0; i < rects.size(); ++i)
        qt_scrollRectInImage(d->image->image, rects.at(i), QPoint(dx, dy));

    return true;
#endif
}

setGeometry()

void QRasterWindowSurface::setGeometry ( const QRect &  rect )

virtual

Sets the currently allocated area to be the given rect.

This function is called whenever area covered by the top-level window changes.

See also

geometry()

Reimplemented from QWindowSurface.

Definition at line 342 of file qwindowsurface_raster.cpp.

{
    QWindowSurface::setGeometry(rect);
    Q_D(QRasterWindowSurface);
    d->inSetGeometry = true;
    if (d->image == 0 || d->image->width() < rect.width() || d->image->height() < rect.height()) {
#if (defined(Q_WS_X11) && !defined(QT_NO_XRENDER)) || (defined(Q_WS_WIN) && !defined(Q_WS_WINCE))
#ifndef Q_WS_WIN
        if (d_ptr->translucentBackground)
#else
        if (!qt_widget_private(window())->isOpaque)
#endif
            prepareBuffer(QImage::Format_ARGB32_Premultiplied, window());
        else
#endif
            prepareBuffer(QNativeImage::systemFormat(), window());
    }
    d->inSetGeometry = false;

#if defined(Q_WS_MAC) && defined(QT_MAC_USE_COCOA)
    QMainWindow* mWindow = qobject_cast<QMainWindow*>(window());
    if (mWindow) {
        QMainWindowLayout *mLayout = qobject_cast<QMainWindowLayout*>(mWindow->layout());
        QList<QToolBar *> toolbarList = mLayout->qtoolbarsInUnifiedToolbarList;

        for (int i = 0; i < toolbarList.size(); ++i) {
            QToolBar* toolbar = toolbarList.at(i);
            if (mLayout->toolBarArea(toolbar) == Qt::TopToolBarArea) {
                QWidget* tbWidget = (QWidget*) toolbar;
                if (tbWidget->d_func()->unifiedSurface) {
                    tbWidget->d_func()->unifiedSurface->setGeometry(rect);
                }
            }
        }
    }
#endif // Q_WS_MAC && QT_MAC_USE_COCOA

}

syncX()

void QRasterWindowSurface::syncX ( )

private

Definition at line 130 of file qwindowsurface_raster.cpp.

Referenced by beginPaint(), and scroll().

{
    // delay writing to the backbuffer until we know for sure X is done reading from it
    if (d_ptr->needsSync) {
        XSync(X11->display, false);
        d_ptr->needsSync = false;
    }
}

Properties

d_ptr

QScopedPointer<QRasterWindowSurfacePrivate> QRasterWindowSurface::d_ptr

private

Definition at line 127 of file qwindowsurface_raster_p.h.

Referenced by beginPaint(), flush(), paintDevice(), QRasterWindowSurface(), setGeometry(), syncX(), and ~QRasterWindowSurface().

---

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

• /src/gui/painting/qwindowsurface_raster_p.h
• /src/gui/painting/qwindowsurface_raster.cpp