void QRasterWindowSurface::prepareBuffer(QImage::Format format, QWidget *widget)
{
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;
}
void QX11WindowSurface::setGeometry(const QRect &rect)
{
QWindowSurface::setGeometry(rect);
const QSize size = rect.size();
if (d_ptr->device.size() == size || size.width() <= 0 || size.height() <= 0)
return;
#ifndef QT_NO_XRENDER
if (d_ptr->translucentBackground) {
QX11PixmapData *data = new QX11PixmapData(QPixmapData::PixmapType);
data->xinfo = d_ptr->widget->x11Info();
data->resize(size.width(), size.height());
d_ptr->device = QPixmap(data);
} else
#endif
{
QPixmap::x11SetDefaultScreen(d_ptr->widget->x11Info().screen());
QX11PixmapData *oldData = static_cast<QX11PixmapData *>(d_ptr->device.pixmapData());
if (oldData && !(oldData->flags & QX11PixmapData::Uninitialized) && hasStaticContents()) {
// Copy the content of the old pixmap into the new one.
QX11PixmapData *newData = new QX11PixmapData(QPixmapData::PixmapType);
newData->resize(size.width(), size.height());
Q_ASSERT(oldData->d == newData->d);
QRegion staticRegion(staticContents());
// Make sure we're inside the boundaries of the old pixmap.
staticRegion &= QRect(0, 0, oldData->w, oldData->h);
const QRect boundingRect(staticRegion.boundingRect());
const int dx = boundingRect.x();
const int dy = boundingRect.y();
int num;
XRectangle *rects = (XRectangle *)qt_getClipRects(staticRegion, num);
GC tmpGc = XCreateGC(X11->display, oldData->hd, 0, 0);
XSetClipRectangles(X11->display, tmpGc, 0, 0, rects, num, YXBanded);
XCopyArea(X11->display, oldData->hd, newData->hd, tmpGc,
dx, dy, qMin(boundingRect.width(), size.width()),
qMin(boundingRect.height(), size.height()), dx, dy);
XFreeGC(X11->display, tmpGc);
newData->flags &= ~QX11PixmapData::Uninitialized;
d_ptr->device = QPixmap(newData);
} else {
d_ptr->device = QPixmap(size);
}
}
if (gc) {
XFreeGC(X11->display, gc);
gc = 0;
}
if (!d_ptr->device.isNull()) {
gc = XCreateGC(X11->display, d_ptr->device.handle(), 0, 0);
XSetGraphicsExposures(X11->display, gc, False);
}
}
/*!
Synchronizes the backing store, i.e. dirty areas are repainted and flushed.
*/
void QWidgetBackingStore::sync()
{
QTLWExtra *tlwExtra = tlw->d_func()->maybeTopData();
if (discardSyncRequest(tlw, tlwExtra)) {
// If the top-level is minimized, it's not visible on the screen so we can delay the
// update until it's shown again. In order to do that we must keep the dirty states.
// These will be cleared when we receive the first expose after showNormal().
// However, if the widget is not visible (isVisible() returns false), everything will
// be invalidated once the widget is shown again, so clear all dirty states.
if (!tlw->isVisible()) {
dirty = QRegion();
for (int i = 0; i < dirtyWidgets.size(); ++i)
resetWidget(dirtyWidgets.at(i));
dirtyWidgets.clear();
fullUpdatePending = false;
}
return;
}
const bool updatesDisabled = !tlw->updatesEnabled();
bool repaintAllWidgets = false;
const bool inTopLevelResize = tlwExtra->inTopLevelResize;
const QRect tlwRect(tlw->data->crect);
const QRect surfaceGeometry(windowSurface->geometry());
if ((fullUpdatePending || inTopLevelResize || surfaceGeometry.size() != tlwRect.size()) && !updatesDisabled) {
if (hasStaticContents()) {
// Repaint existing dirty area and newly visible area.
const QRect clipRect(0, 0, surfaceGeometry.width(), surfaceGeometry.height());
const QRegion staticRegion(staticContents(0, clipRect));
QRegion newVisible(0, 0, tlwRect.width(), tlwRect.height());
newVisible -= staticRegion;
dirty += newVisible;
windowSurface->setStaticContents(staticRegion);
} else {
// Repaint everything.
dirty = QRegion(0, 0, tlwRect.width(), tlwRect.height());
for (int i = 0; i < dirtyWidgets.size(); ++i)
resetWidget(dirtyWidgets.at(i));
dirtyWidgets.clear();
repaintAllWidgets = true;
}
}
if (inTopLevelResize || surfaceGeometry != tlwRect)
windowSurface->setGeometry(tlwRect);
if (updatesDisabled)
return;
if (hasDirtyFromPreviousSync)
dirty += dirtyFromPreviousSync;
// Contains everything that needs repaint.
QRegion toClean(dirty);
// Loop through all update() widgets and remove them from the list before they are
// painted (in case someone calls update() in paintEvent). If the widget is opaque
// and does not have transparent overlapping siblings, append it to the
// opaqueNonOverlappedWidgets list and paint it directly without composition.
QVarLengthArray<QWidget *, 32> opaqueNonOverlappedWidgets;
for (int i = 0; i < dirtyWidgets.size(); ++i) {
QWidget *w = dirtyWidgets.at(i);
QWidgetPrivate *wd = w->d_func();
if (wd->data.in_destructor)
continue;
// Clip with mask() and clipRect().
wd->dirty &= wd->clipRect();
wd->clipToEffectiveMask(wd->dirty);
// Subtract opaque siblings and children.
bool hasDirtySiblingsAbove = false;
// We know for sure that the widget isn't overlapped if 'isMoved' is true.
if (!wd->isMoved)
wd->subtractOpaqueSiblings(wd->dirty, &hasDirtySiblingsAbove);
// Scrolled and moved widgets must draw all children.
if (!wd->isScrolled && !wd->isMoved)
wd->subtractOpaqueChildren(wd->dirty, w->rect());
if (wd->dirty.isEmpty()) {
resetWidget(w);
continue;
}
const QRegion widgetDirty(w != tlw ? wd->dirty.translated(w->mapTo(tlw, QPoint()))
: wd->dirty);
toClean += widgetDirty;
#ifndef QT_NO_GRAPHICSVIEW
if (tlw->d_func()->extra->proxyWidget) {
resetWidget(w);
continue;
}
#endif
if (!hasDirtySiblingsAbove && wd->isOpaque && !dirty.intersects(widgetDirty.boundingRect())) {
opaqueNonOverlappedWidgets.append(w);
} else {
resetWidget(w);
dirty += widgetDirty;
}
}
dirtyWidgets.clear();
fullUpdatePending = false;
if (toClean.isEmpty()) {
// Nothing to repaint. However, we might have newly exposed areas on the
// screen if this function was called from sync(QWidget *, QRegion)), so
// we have to make sure those are flushed.
flush();
return;
}
#ifndef QT_NO_GRAPHICSVIEW
if (tlw->d_func()->extra->proxyWidget) {
updateStaticContentsSize();
dirty = QRegion();
const QVector<QRect> rects(toClean.rects());
for (int i = 0; i < rects.size(); ++i)
tlw->d_func()->extra->proxyWidget->update(rects.at(i));
return;
}
#endif
#ifndef Q_BACKINGSTORE_SUBSURFACES
BeginPaintInfo beginPaintInfo;
beginPaint(toClean, tlw, windowSurface, &beginPaintInfo);
if (beginPaintInfo.nothingToPaint) {
for (int i = 0; i < opaqueNonOverlappedWidgets.size(); ++i)
resetWidget(opaqueNonOverlappedWidgets[i]);
dirty = QRegion();
return;
}
#endif
// Must do this before sending any paint events because
// the size may change in the paint event.
updateStaticContentsSize();
const QRegion dirtyCopy(dirty);
dirty = QRegion();
// Paint opaque non overlapped widgets.
for (int i = 0; i < opaqueNonOverlappedWidgets.size(); ++i) {
QWidget *w = opaqueNonOverlappedWidgets[i];
QWidgetPrivate *wd = w->d_func();
int flags = QWidgetPrivate::DrawRecursive;
// Scrolled and moved widgets must draw all children.
if (!wd->isScrolled && !wd->isMoved)
flags |= QWidgetPrivate::DontDrawOpaqueChildren;
if (w == tlw)
flags |= QWidgetPrivate::DrawAsRoot;
QRegion toBePainted(wd->dirty);
resetWidget(w);
#ifdef Q_BACKINGSTORE_SUBSURFACES
QWindowSurface *subSurface = w->windowSurface();
BeginPaintInfo beginPaintInfo;
QPoint off = w->mapTo(tlw, QPoint());
toBePainted.translate(off);
beginPaint(toBePainted, w, subSurface, &beginPaintInfo, true);
toBePainted.translate(-off);
if (beginPaintInfo.nothingToPaint)
continue;
if (beginPaintInfo.windowSurfaceRecreated) {
// Eep the window surface has changed. The old one may have been
// deleted, in which case we will segfault on the call to
// painterOffset() below. Use the new window surface instead.
subSurface = w->windowSurface();
}
QPoint offset(tlwOffset);
if (subSurface == windowSurface)
offset += w->mapTo(tlw, QPoint());
else
offset = static_cast<QWSWindowSurface*>(subSurface)->painterOffset();
wd->drawWidget(subSurface->paintDevice(), toBePainted, offset, flags, 0, this);
endPaint(toBePainted, subSurface, &beginPaintInfo);
#else
QPoint offset(tlwOffset);
if (w != tlw)
offset += w->mapTo(tlw, QPoint());
wd->drawWidget(windowSurface->paintDevice(), toBePainted, offset, flags, 0, this);
#endif
}
// Paint the rest with composition.
#ifndef Q_BACKINGSTORE_SUBSURFACES
if (repaintAllWidgets || !dirtyCopy.isEmpty()) {
const int flags = QWidgetPrivate::DrawAsRoot | QWidgetPrivate::DrawRecursive;
tlw->d_func()->drawWidget(windowSurface->paintDevice(), dirtyCopy, tlwOffset, flags, 0, this);
}
endPaint(toClean, windowSurface, &beginPaintInfo);
#else
if (!repaintAllWidgets && dirtyCopy.isEmpty())
return; // Nothing more to paint.
QList<QWindowSurface *> surfaceList(subSurfaces);
surfaceList.prepend(windowSurface);
const QRect dirtyBoundingRect(dirtyCopy.boundingRect());
// Loop through all window surfaces (incl. the top-level surface) and
// repaint those intersecting with the bounding rect of the dirty region.
for (int i = 0; i < surfaceList.size(); ++i) {
QWindowSurface *subSurface = surfaceList.at(i);
QWidget *w = subSurface->window();
QWidgetPrivate *wd = w->d_func();
const QRect clipRect = wd->clipRect().translated(w->mapTo(tlw, QPoint()));
if (!qRectIntersects(dirtyBoundingRect, clipRect))
continue;
toClean = dirtyCopy;
BeginPaintInfo beginPaintInfo;
beginPaint(toClean, w, subSurface, &beginPaintInfo);
if (beginPaintInfo.nothingToPaint)
continue;
if (beginPaintInfo.windowSurfaceRecreated) {
// Eep the window surface has changed. The old one may have been
// deleted, in which case we will segfault on the call to
// painterOffset() below. Use the new window surface instead.
subSurface = w->windowSurface();
}
int flags = QWidgetPrivate::DrawRecursive;
if (w == tlw)
flags |= QWidgetPrivate::DrawAsRoot;
const QPoint painterOffset = static_cast<QWSWindowSurface*>(subSurface)->painterOffset();
wd->drawWidget(subSurface->paintDevice(), toClean, painterOffset, flags, 0, this);
endPaint(toClean, subSurface, &beginPaintInfo);
}
#endif
}