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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include <QtGui/QPaintDevice>

    43 #include <QtGui/QPainter>

    44 #include <QtGui/QPixmap>

    45 #include <QtGui/QWidget>

    46 

    47 #include "private/qt_x11_p.h"

    48 #include "private/qpixmap_x11_p.h"

    49 #include "private/qwidget_p.h"

    50 #include "qx11info_x11.h"

    51 #include "qwindowsurface_x11_p.h"

    52 

    53 QT_BEGIN_NAMESPACE

    54 

    55 extern void *qt_getClipRects(const QRegion &r, int &num); // in qpaintengine_x11.cpp

    56 

    57 struct QX11WindowSurfacePrivate

    58 {

    59     QWidget *widget;

    60     QPixmap device;

    61 #ifndef QT_NO_XRENDER

    62     bool translucentBackground;

    63 #endif

    64 };

    65 

    66 QX11WindowSurface::QX11WindowSurface(QWidget *widget)

    67     : QWindowSurface(widget), d_ptr(new QX11WindowSurfacePrivate), gc(0)

    68 {

    69     d_ptr->widget = widget;

    70 #ifndef QT_NO_XRENDER

    71     d_ptr->translucentBackground = X11->use_xrender

    72         && widget->x11Info().depth() == 32;

    73     setStaticContentsSupport(!d_ptr->translucentBackground);

    74 #else

    75     setStaticContentsSupport(true);

    76 #endif

    77 }

    78 

    79 

    80 QX11WindowSurface::~QX11WindowSurface()

    81 {

    82     delete d_ptr;

    83     if (gc) {

    84         XFreeGC(X11->display, gc);

    85         gc = 0;

    86     }

    87 }

    88 

    89 QPaintDevice *QX11WindowSurface::paintDevice()

    90 {

    91     return &d_ptr->device;

    92 }

    93 

    94 void QX11WindowSurface::beginPaint(const QRegion &rgn)

    95 {

    96 #ifndef QT_NO_XRENDER

    97     if (d_ptr->translucentBackground) {

    98         if (d_ptr->device.depth() != 32)

    99             static_cast<QX11PixmapData *>(d_ptr->device.data_ptr().data())->convertToARGB32();

   100         ::Picture src = X11->getSolidFill(d_ptr->device.x11Info().screen(), Qt::transparent);

   101         ::Picture dst = d_ptr->device.x11PictureHandle();

   102         const QVector<QRect> rects = rgn.rects();

   103         const int w = d_ptr->device.width();

   104         const int h = d_ptr->device.height();

   105         for (QVector<QRect>::const_iterator it = rects.begin(); it != rects.end(); ++it)

   106             XRenderComposite(X11->display, PictOpSrc, src, 0, dst,

   107                              0, 0, w, h, it->x(), it->y(),

   108                              it->width(), it->height());

   109     }

   110 #endif

   111 }

   112 

   113 void QX11WindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &offset)

   114 {

   115     if (d_ptr->device.isNull())

   116         return;

   117 

   118     QPoint wOffset = qt_qwidget_data(widget)->wrect.topLeft();

   119     QRegion wrgn(rgn);

   120     QRect br = rgn.boundingRect();

   121     if (!wOffset.isNull())

   122         wrgn.translate(-wOffset);

   123     QRect wbr = wrgn.boundingRect();

   124 

   125     int num;

   126     XRectangle *rects = (XRectangle *)qt_getClipRects(wrgn, num);

   127     if (num <= 0)

   128         return;

   129 //         qDebug() << "XSetClipRectangles";

   130 //         for  (int i = 0; i < num; ++i)

   131 //             qDebug() << ' ' << i << rects[i].x << rects[i].x << rects[i].y << rects[i].width << rects[i].height;

   132     if (num != 1)

   133         XSetClipRectangles(X11->display, gc, 0, 0, rects, num, YXBanded);

   134     XCopyArea(X11->display, d_ptr->device.handle(), widget->handle(), gc,

   135               br.x() + offset.x(), br.y() + offset.y(), br.width(), br.height(), wbr.x(), wbr.y());

   136     if (num != 1)

   137         XSetClipMask(X11->display, gc, XNone);

   138 }

   139 

   140 void QX11WindowSurface::setGeometry(const QRect &rect)

   141 {

   142     QWindowSurface::setGeometry(rect);

   143 

   144     const QSize size = rect.size();

   145 

   146     if (d_ptr->device.size() == size || size.width() <= 0 || size.height() <= 0)

   147         return;

   148 #ifndef QT_NO_XRENDER

   149     if (d_ptr->translucentBackground) {

   150         QX11PixmapData *data = new QX11PixmapData(QPixmapData::PixmapType);

   151         data->xinfo = d_ptr->widget->x11Info();

   152         data->resize(size.width(), size.height());

   153         d_ptr->device = QPixmap(data);

   154     } else

   155 #endif

   156     {

   157         QPixmap::x11SetDefaultScreen(d_ptr->widget->x11Info().screen());

   158 

   159         QX11PixmapData *oldData = static_cast<QX11PixmapData *>(d_ptr->device.pixmapData());

   160         Q_ASSERT(oldData);

   161         if (!(oldData->flags & QX11PixmapData::Uninitialized) && hasStaticContents()) {

   162             // Copy the content of the old pixmap into the new one.

   163             QX11PixmapData *newData = new QX11PixmapData(QPixmapData::PixmapType);

   164             newData->resize(size.width(), size.height());

   165             Q_ASSERT(oldData->d == newData->d);

   166 

   167             QRegion staticRegion(staticContents());

   168             // Make sure we're inside the boundaries of the old pixmap.

   169             staticRegion &= QRect(0, 0, oldData->w, oldData->h);

   170             const QRect boundingRect(staticRegion.boundingRect());

   171             const int dx = boundingRect.x();

   172             const int dy = boundingRect.y();

   173 

   174             int num;

   175             XRectangle *rects = (XRectangle *)qt_getClipRects(staticRegion, num);

   176             GC tmpGc = XCreateGC(X11->display, oldData->hd, 0, 0);

   177             XSetClipRectangles(X11->display, tmpGc, 0, 0, rects, num, YXBanded);

   178             XCopyArea(X11->display, oldData->hd, newData->hd, tmpGc,

   179                       dx, dy, qMin(boundingRect.width(), size.width()),

   180                       qMin(boundingRect.height(), size.height()), dx, dy);

   181             XFreeGC(X11->display, tmpGc);

   182             newData->flags &= ~QX11PixmapData::Uninitialized;

   183 

   184             d_ptr->device = QPixmap(newData);

   185         } else {

   186             d_ptr->device = QPixmap(size);

   187         }

   188     }

   189 

   190     if (gc) {

   191         XFreeGC(X11->display, gc);

   192         gc = 0;

   193     }

   194     if (!d_ptr->device.isNull()) {

   195         gc = XCreateGC(X11->display, d_ptr->device.handle(), 0, 0);

   196         XSetGraphicsExposures(X11->display, gc, False);

   197     }

   198 }

   199 

   200 bool QX11WindowSurface::scroll(const QRegion &area, int dx, int dy)

   201 {

   202     QRect rect = area.boundingRect();

   203 

   204     if (d_ptr->device.isNull())

   205         return false;

   206 

   207     GC gc = XCreateGC(X11->display, d_ptr->device.handle(), 0, 0);

   208     XCopyArea(X11->display, d_ptr->device.handle(), d_ptr->device.handle(), gc,

   209               rect.x(), rect.y(), rect.width(), rect.height(),

   210               rect.x()+dx, rect.y()+dy);

   211     XFreeGC(X11->display, gc);

   212 

   213     return true;

   214 }

   215 

   216 QPixmap QX11WindowSurface::grabWidget(const QWidget *widget,

   217                                       const QRect& rect) const

   218 {

   219     if (!widget || d_ptr->device.isNull())

   220         return QPixmap();

   221 

   222     QRect srcRect;

   223 

   224     // make sure the rect is inside the widget & clip to widget's rect

   225     if (!rect.isEmpty())

   226         srcRect = rect & widget->rect();

   227     else

   228         srcRect = widget->rect();

   229 

   230     if (srcRect.isEmpty())

   231         return QPixmap();

   232 

   233     // If it's a child widget we have to translate the coordinates

   234     if (widget != window())

   235         srcRect.translate(widget->mapTo(window(), QPoint(0, 0)));

   236 

   237     QPixmap::x11SetDefaultScreen(widget->x11Info().screen());

   238     QPixmap px(srcRect.width(), srcRect.height());

   239 

   240     GC tmpGc = XCreateGC(X11->display, d_ptr->device.handle(), 0, 0);

   241 

   242     // Copy srcRect from the backing store to the new pixmap

   243     XSetGraphicsExposures(X11->display, tmpGc, False);

   244     XCopyArea(X11->display, d_ptr->device.handle(), px.handle(), tmpGc,

   245               srcRect.x(), srcRect.y(), srcRect.width(), srcRect.height(), 0, 0);

   246 

   247     XFreeGC(X11->display, tmpGc);

   248 

   249     return px;

   250 }

   251 

   252 QT_END_NAMESPACE