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Diffstat (limited to 'src/widgets/kernel/qbackingstore.cpp')
| -rw-r--r-- | src/widgets/kernel/qbackingstore.cpp | 1665 |
1 files changed, 1665 insertions, 0 deletions
diff --git a/src/widgets/kernel/qbackingstore.cpp b/src/widgets/kernel/qbackingstore.cpp new file mode 100644 index 0000000000..1d5fbbc8f9 --- /dev/null +++ b/src/widgets/kernel/qbackingstore.cpp @@ -0,0 +1,1665 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + + +#include "qplatformdefs.h" + +#include "qbackingstore_p.h" + +#include <QtCore/qglobal.h> +#include <QtCore/qdebug.h> +#include <QtCore/qvarlengtharray.h> +#include <QtGui/qevent.h> +#include <QtWidgets/qapplication.h> +#include <QtGui/qpaintengine.h> +#include <QtWidgets/qgraphicsproxywidget.h> + +#include <private/qwidget_p.h> +#include <private/qapplication_p.h> +#include <private/qpaintengine_raster_p.h> +#include <private/qgraphicseffect_p.h> + +#ifdef Q_WS_QWS +#include <QtGui/qwsmanager_qws.h> +#include <private/qwsmanager_p.h> +#endif + +QT_BEGIN_NAMESPACE + +extern QRegion qt_dirtyRegion(QWidget *); + +/* + A version of QRect::intersects() that does not normalize the rects. +*/ +static inline bool qRectIntersects(const QRect &r1, const QRect &r2) +{ + return (qMax(r1.left(), r2.left()) <= qMin(r1.right(), r2.right()) + && qMax(r1.top(), r2.top()) <= qMin(r1.bottom(), r2.bottom())); +} + +/** + * Flushes the contents of the \a windowSurface into the screen area of \a widget. + * \a tlwOffset is the position of the top level widget relative to the window surface. + * \a region is the region to be updated in \a widget coordinates. + */ +static inline void qt_flush(QWidget *widget, const QRegion ®ion, QWindowSurface *windowSurface, + QWidget *tlw, const QPoint &tlwOffset) +{ + Q_ASSERT(widget); + Q_ASSERT(!region.isEmpty()); + Q_ASSERT(windowSurface); + Q_ASSERT(tlw); + +#if !defined(QT_NO_PAINT_DEBUG) && !defined(Q_WS_QWS) + // QWS does flush update in QWindowSurface::flush (because it needs to lock the surface etc). + static int flushUpdate = qgetenv("QT_FLUSH_UPDATE").toInt(); + if (flushUpdate > 0) + QWidgetBackingStore::showYellowThing(widget, region, flushUpdate * 10, false); +#endif + + //The performance hit by doing this should be negligible. However, be aware that + //using this FPS when you have > 1 windowsurface can give you inaccurate FPS + static bool fpsDebug = qgetenv("QT_DEBUG_FPS").toInt(); + if (fpsDebug) { + static QTime time = QTime::currentTime(); + static int frames = 0; + + frames++; + + if(time.elapsed() > 5000) { + double fps = double(frames * 1000) /time.restart(); + fprintf(stderr,"FPS: %.1f\n",fps); + frames = 0; + } + } + if (widget != tlw) + windowSurface->flush(widget->windowHandle(), region, tlwOffset + widget->mapTo(tlw, QPoint())); + else + windowSurface->flush(widget->windowHandle(), region, tlwOffset); +} + +#ifndef QT_NO_PAINT_DEBUG +#ifdef Q_WS_WIN +static void showYellowThing_win(QWidget *widget, const QRegion ®ion, int msec) +{ + HBRUSH brush; + static int i = 0; + switch (i) { + case 0: + brush = CreateSolidBrush(RGB(255, 255, 0)); + break; + case 1: + brush = CreateSolidBrush(RGB(255, 200, 55)); + break; + case 2: + brush = CreateSolidBrush(RGB(200, 255, 55)); + break; + case 3: + brush = CreateSolidBrush(RGB(200, 200, 0)); + break; + } + i = (i + 1) & 3; + + HDC hdc = widget->getDC(); + + const QVector<QRect> &rects = region.rects(); + foreach (QRect rect, rects) { + RECT winRect; + SetRect(&winRect, rect.left(), rect.top(), rect.right(), rect.bottom()); + FillRect(hdc, &winRect, brush); + } + + widget->releaseDC(hdc); + ::Sleep(msec); +} +#endif + +void QWidgetBackingStore::showYellowThing(QWidget *widget, const QRegion &toBePainted, int msec, bool unclipped) +{ +#ifdef Q_WS_QWS + Q_UNUSED(widget); + Q_UNUSED(unclipped); + static QWSYellowSurface surface(true); + surface.setDelay(msec); + surface.flush(widget, toBePainted, QPoint()); +#else + QRegion paintRegion = toBePainted; + QRect widgetRect = widget->rect(); + + if (!widget->internalWinId()) { + QWidget *nativeParent = widget->nativeParentWidget(); + const QPoint offset = widget->mapTo(nativeParent, QPoint(0, 0)); + paintRegion.translate(offset); + widgetRect.translate(offset); + widget = nativeParent; + } + +#ifdef Q_WS_WIN + Q_UNUSED(unclipped); + showYellowThing_win(widget, paintRegion, msec); +#else + //flags to fool painter + bool paintUnclipped = widget->testAttribute(Qt::WA_PaintUnclipped); + if (unclipped && !widget->d_func()->paintOnScreen()) + widget->setAttribute(Qt::WA_PaintUnclipped); + + const bool setFlag = !widget->testAttribute(Qt::WA_WState_InPaintEvent); + if (setFlag) + widget->setAttribute(Qt::WA_WState_InPaintEvent); + + //setup the engine + QPaintEngine *pe = widget->paintEngine(); + if (pe) { + pe->setSystemClip(paintRegion); + { + QPainter p(widget); + p.setClipRegion(paintRegion); + static int i = 0; + switch (i) { + case 0: + p.fillRect(widgetRect, QColor(255,255,0)); + break; + case 1: + p.fillRect(widgetRect, QColor(255,200,55)); + break; + case 2: + p.fillRect(widgetRect, QColor(200,255,55)); + break; + case 3: + p.fillRect(widgetRect, QColor(200,200,0)); + break; + } + i = (i+1) & 3; + p.end(); + } + } + + if (setFlag) + widget->setAttribute(Qt::WA_WState_InPaintEvent, false); + + //restore + widget->setAttribute(Qt::WA_PaintUnclipped, paintUnclipped); + + if (pe) + pe->setSystemClip(QRegion()); + + QApplication::syncX(); + +#if defined(Q_OS_UNIX) + ::usleep(1000 * msec); +#endif +#endif // Q_WS_WIN +#endif // Q_WS_QWS +} + +bool QWidgetBackingStore::flushPaint(QWidget *widget, const QRegion &rgn) +{ + if (!widget) + return false; + + int delay = 0; + if (widget->testAttribute(Qt::WA_WState_InPaintEvent)) { + static int flushPaintEvent = qgetenv("QT_FLUSH_PAINT_EVENT").toInt(); + if (!flushPaintEvent) + return false; + delay = flushPaintEvent; + } else { + static int flushPaint = qgetenv("QT_FLUSH_PAINT").toInt(); + if (!flushPaint) + return false; + delay = flushPaint; + } + + QWidgetBackingStore::showYellowThing(widget, rgn, delay * 10, true); + return true; +} + +void QWidgetBackingStore::unflushPaint(QWidget *widget, const QRegion &rgn) +{ + if (widget->d_func()->paintOnScreen() || rgn.isEmpty()) + return; + + QWidget *tlw = widget->window(); + QTLWExtra *tlwExtra = tlw->d_func()->maybeTopData(); + if (!tlwExtra) + return; + + const QPoint offset = widget->mapTo(tlw, QPoint()); + qt_flush(widget, rgn, tlwExtra->backingStore->windowSurface, tlw, offset); +} +#endif // QT_NO_PAINT_DEBUG + +/* + Moves the whole rect by (dx, dy) in widget's coordinate system. + Doesn't generate any updates. +*/ +bool QWidgetBackingStore::bltRect(const QRect &rect, int dx, int dy, QWidget *widget) +{ + const QPoint pos(tlwOffset + widget->mapTo(tlw, rect.topLeft())); + const QRect tlwRect(QRect(pos, rect.size())); + if (fullUpdatePending || dirty.intersects(tlwRect)) + return false; // We don't want to scroll junk. + return windowSurface->scroll(tlwRect, dx, dy); +} + +void QWidgetBackingStore::releaseBuffer() +{ + if (windowSurface) +#if defined(Q_WS_QPA) + windowSurface->resize(QSize()); +#else + windowSurface->setGeometry(QRect()); +#endif +#ifdef Q_BACKINGSTORE_SUBSURFACES + for (int i = 0; i < subSurfaces.size(); ++i) + subSurfaces.at(i)->setGeometry(QRect()); +#endif +} + +/*! + Prepares the window surface to paint a\ toClean region of the \a widget and + updates the BeginPaintInfo struct accordingly. + + The \a toClean region might be clipped by the window surface. +*/ +void QWidgetBackingStore::beginPaint(QRegion &toClean, QWidget *widget, QWindowSurface *windowSurface, + BeginPaintInfo *returnInfo, bool toCleanIsInTopLevelCoordinates) +{ +#ifdef Q_WS_QWS + QWSWindowSurface *surface = static_cast<QWSWindowSurface *>(windowSurface); + QWidget *surfaceWidget = surface->window(); + + if (!surface->isValid()) { + // this looks strange but it really just releases the surface + surface->releaseSurface(); + // the old window surface is deleted in setWindowSurface, which is + // called from QWindowSurface constructor. + windowSurface = tlw->d_func()->createDefaultWindowSurface(); + surface = static_cast<QWSWindowSurface *>(windowSurface); + // createDefaultWindowSurface() will set topdata->windowSurface on the + // widget to zero. However, if this is a sub-surface, it should point + // to the widget's sub windowSurface, so we set that here: + if (!surfaceWidget->isWindow()) + surfaceWidget->d_func()->topData()->windowSurface = windowSurface; + surface->setGeometry(topLevelRect()); + returnInfo->windowSurfaceRecreated = true; + } + + const QRegion toCleanUnclipped(toClean); + + if (surfaceWidget->isWindow()) + tlwOffset = surface->painterOffset(); +#ifdef Q_BACKINGSTORE_SUBSURFACES + else if (toCleanIsInTopLevelCoordinates) + toClean &= surface->clipRegion().translated(surfaceWidget->mapTo(tlw, QPoint())); + if (!toCleanIsInTopLevelCoordinates && windowSurface == this->windowSurface) + toClean &= surface->clipRegion().translated(-widget->mapTo(surfaceWidget, QPoint())); +#else + toClean &= surface->clipRegion(); +#endif + + if (toClean.isEmpty()) { + if (surfaceWidget->isWindow()) { + dirtyFromPreviousSync += toCleanUnclipped; + hasDirtyFromPreviousSync = true; + } + + returnInfo->nothingToPaint = true; + // Nothing to repaint. However, we might have newly exposed areas on the + // screen, so we have to make sure those are flushed. + flush(); + return; + } + + if (surfaceWidget->isWindow()) { + if (toCleanUnclipped != toClean) { + dirtyFromPreviousSync += (toCleanUnclipped - surface->clipRegion()); + hasDirtyFromPreviousSync = true; + } + if (hasDirtyFromPreviousSync) { + dirtyFromPreviousSync -= toClean; + hasDirtyFromPreviousSync = !dirtyFromPreviousSync.isEmpty(); + } + } + +#endif // Q_WS_QWS + + Q_UNUSED(widget); + Q_UNUSED(toCleanIsInTopLevelCoordinates); + + // Always flush repainted areas. + dirtyOnScreen += toClean; + +#if defined(Q_WS_QWS) && !defined(Q_BACKINGSTORE_SUBSURFACES) + toClean.translate(tlwOffset); +#endif + +#ifdef QT_NO_PAINT_DEBUG + windowSurface->beginPaint(toClean); +#else + returnInfo->wasFlushed = QWidgetBackingStore::flushPaint(tlw, toClean); + // Avoid deadlock with QT_FLUSH_PAINT: the server will wait for + // the BackingStore lock, so if we hold that, the server will + // never release the Communication lock that we are waiting for in + // sendSynchronousCommand + if (!returnInfo->wasFlushed) + windowSurface->beginPaint(toClean); +#endif + + Q_UNUSED(returnInfo); +} + +void QWidgetBackingStore::endPaint(const QRegion &cleaned, QWindowSurface *windowSurface, + BeginPaintInfo *beginPaintInfo) +{ +#ifndef QT_NO_PAINT_DEBUG + if (!beginPaintInfo->wasFlushed) + windowSurface->endPaint(cleaned); + else + QWidgetBackingStore::unflushPaint(tlw, cleaned); +#else + Q_UNUSED(beginPaintInfo); + windowSurface->endPaint(cleaned); +#endif + +#ifdef Q_BACKINGSTORE_SUBSURFACES + flush(static_cast<QWSWindowSurface *>(windowSurface)->window(), windowSurface); +#else + flush(); +#endif +} + +/*! + Returns the region (in top-level coordinates) that needs repaint and/or flush. + + If the widget is non-zero, only the dirty region for the widget is returned + and the region will be in widget coordinates. +*/ +QRegion QWidgetBackingStore::dirtyRegion(QWidget *widget) const +{ + const bool widgetDirty = widget && widget != tlw; + const QRect tlwRect(topLevelRect()); +#if defined(Q_WS_QPA) + const QRect surfaceGeometry(tlwRect.topLeft(), windowSurface->size()); +#else + const QRect surfaceGeometry(windowSurface->geometry()); +#endif + if (fullUpdatePending || (surfaceGeometry != tlwRect && surfaceGeometry.size() != tlwRect.size())) { + if (widgetDirty) { + const QRect dirtyTlwRect = QRect(QPoint(), tlwRect.size()); + const QPoint offset(widget->mapTo(tlw, QPoint())); + const QRect dirtyWidgetRect(dirtyTlwRect & widget->rect().translated(offset)); + return dirtyWidgetRect.translated(-offset); + } + return QRect(QPoint(), tlwRect.size()); + } + + // Calculate the region that needs repaint. + QRegion r(dirty); + for (int i = 0; i < dirtyWidgets.size(); ++i) { + QWidget *w = dirtyWidgets.at(i); + if (widgetDirty && w != widget && !widget->isAncestorOf(w)) + continue; + r += w->d_func()->dirty.translated(w->mapTo(tlw, QPoint())); + } + + // Append the region that needs flush. + r += dirtyOnScreen; + + if (dirtyOnScreenWidgets) { // Only in use with native child widgets. + for (int i = 0; i < dirtyOnScreenWidgets->size(); ++i) { + QWidget *w = dirtyOnScreenWidgets->at(i); + if (widgetDirty && w != widget && !widget->isAncestorOf(w)) + continue; + QWidgetPrivate *wd = w->d_func(); + Q_ASSERT(wd->needsFlush); + r += wd->needsFlush->translated(w->mapTo(tlw, QPoint())); + } + } + + if (widgetDirty) { + // Intersect with the widget geometry and translate to its coordinates. + const QPoint offset(widget->mapTo(tlw, QPoint())); + r &= widget->rect().translated(offset); + r.translate(-offset); + } + return r; +} + +/*! + Returns the static content inside the \a parent if non-zero; otherwise the static content + for the entire backing store is returned. The content will be clipped to \a withinClipRect + if non-empty. +*/ +QRegion QWidgetBackingStore::staticContents(QWidget *parent, const QRect &withinClipRect) const +{ + if (!parent && tlw->testAttribute(Qt::WA_StaticContents)) { +#if defined(Q_WS_QPA) + const QSize surfaceGeometry(windowSurface->size()); +#else + const QRect surfaceGeometry(windowSurface->geometry()); +#endif + QRect surfaceRect(0, 0, surfaceGeometry.width(), surfaceGeometry.height()); + if (!withinClipRect.isEmpty()) + surfaceRect &= withinClipRect; + return QRegion(surfaceRect); + } + + QRegion region; + if (parent && parent->d_func()->children.isEmpty()) + return region; + + const bool clipToRect = !withinClipRect.isEmpty(); + const int count = staticWidgets.count(); + for (int i = 0; i < count; ++i) { + QWidget *w = staticWidgets.at(i); + QWidgetPrivate *wd = w->d_func(); + if (!wd->isOpaque || !wd->extra || wd->extra->staticContentsSize.isEmpty() + || !w->isVisible() || (parent && !parent->isAncestorOf(w))) { + continue; + } + + QRect rect(0, 0, wd->extra->staticContentsSize.width(), wd->extra->staticContentsSize.height()); + const QPoint offset = w->mapTo(parent ? parent : tlw, QPoint()); + if (clipToRect) + rect &= withinClipRect.translated(-offset); + if (rect.isEmpty()) + continue; + + rect &= wd->clipRect(); + if (rect.isEmpty()) + continue; + + QRegion visible(rect); + wd->clipToEffectiveMask(visible); + if (visible.isEmpty()) + continue; + wd->subtractOpaqueSiblings(visible, 0, /*alsoNonOpaque=*/true); + + visible.translate(offset); + region += visible; + } + + return region; +} + +static inline void sendUpdateRequest(QWidget *widget, bool updateImmediately) +{ + if (!widget) + return; + + if (updateImmediately) { + QEvent event(QEvent::UpdateRequest); + QApplication::sendEvent(widget, &event); + } else { + QApplication::postEvent(widget, new QEvent(QEvent::UpdateRequest), Qt::LowEventPriority); + } +} + +/*! + Marks the region of the widget as dirty (if not already marked as dirty) and + posts an UpdateRequest event to the top-level widget (if not already posted). + + If updateImmediately is true, the event is sent immediately instead of posted. + + If invalidateBuffer is true, all widgets intersecting with the region will be dirty. + + If the widget paints directly on screen, the event is sent to the widget + instead of the top-level widget, and invalidateBuffer is completely ignored. + + ### Qt 4.6: Merge into a template function (after MSVC isn't supported anymore). +*/ +void QWidgetBackingStore::markDirty(const QRegion &rgn, QWidget *widget, bool updateImmediately, + bool invalidateBuffer) +{ + Q_ASSERT(tlw->d_func()->extra); + Q_ASSERT(tlw->d_func()->extra->topextra); + Q_ASSERT(!tlw->d_func()->extra->topextra->inTopLevelResize); + Q_ASSERT(widget->isVisible() && widget->updatesEnabled()); + Q_ASSERT(widget->window() == tlw); + Q_ASSERT(!rgn.isEmpty()); + +#ifndef QT_NO_GRAPHICSEFFECT + widget->d_func()->invalidateGraphicsEffectsRecursively(); +#endif //QT_NO_GRAPHICSEFFECT + + if (widget->d_func()->paintOnScreen()) { + if (widget->d_func()->dirty.isEmpty()) { + widget->d_func()->dirty = rgn; + sendUpdateRequest(widget, updateImmediately); + return; + } else if (qt_region_strictContains(widget->d_func()->dirty, widget->rect())) { + if (updateImmediately) + sendUpdateRequest(widget, updateImmediately); + return; // Already dirty. + } + + const bool eventAlreadyPosted = !widget->d_func()->dirty.isEmpty(); + widget->d_func()->dirty += rgn; + if (!eventAlreadyPosted || updateImmediately) + sendUpdateRequest(widget, updateImmediately); + return; + } + + if (fullUpdatePending) { + if (updateImmediately) + sendUpdateRequest(tlw, updateImmediately); + return; + } + + if (!windowSurface->hasFeature(QWindowSurface::PartialUpdates)) { + fullUpdatePending = true; + sendUpdateRequest(tlw, updateImmediately); + return; + } + + const QPoint offset = widget->mapTo(tlw, QPoint()); + const QRect widgetRect = widget->d_func()->effectiveRectFor(widget->rect()); + if (qt_region_strictContains(dirty, widgetRect.translated(offset))) { + if (updateImmediately) + sendUpdateRequest(tlw, updateImmediately); + return; // Already dirty. + } + + if (invalidateBuffer) { + const bool eventAlreadyPosted = !dirty.isEmpty(); +#ifndef QT_NO_GRAPHICSEFFECT + if (widget->d_func()->graphicsEffect) + dirty += widget->d_func()->effectiveRectFor(rgn.boundingRect()).translated(offset); + else +#endif //QT_NO_GRAPHICSEFFECT + dirty += rgn.translated(offset); + if (!eventAlreadyPosted || updateImmediately) + sendUpdateRequest(tlw, updateImmediately); + return; + } + + if (dirtyWidgets.isEmpty()) { + addDirtyWidget(widget, rgn); + sendUpdateRequest(tlw, updateImmediately); + return; + } + + if (widget->d_func()->inDirtyList) { + if (!qt_region_strictContains(widget->d_func()->dirty, widgetRect)) { +#ifndef QT_NO_GRAPHICSEFFECT + if (widget->d_func()->graphicsEffect) + widget->d_func()->dirty += widget->d_func()->effectiveRectFor(rgn.boundingRect()); + else +#endif //QT_NO_GRAPHICSEFFECT + widget->d_func()->dirty += rgn; + } + } else { + addDirtyWidget(widget, rgn); + } + + if (updateImmediately) + sendUpdateRequest(tlw, updateImmediately); +} + +/*! + This function is equivalent to calling markDirty(QRegion(rect), ...), but + is more efficient as it eliminates QRegion operations/allocations and can + use the rect more precisely for additional cut-offs. + + ### Qt 4.6: Merge into a template function (after MSVC isn't supported anymore). +*/ +void QWidgetBackingStore::markDirty(const QRect &rect, QWidget *widget, bool updateImmediately, + bool invalidateBuffer) +{ + Q_ASSERT(tlw->d_func()->extra); + Q_ASSERT(tlw->d_func()->extra->topextra); + Q_ASSERT(!tlw->d_func()->extra->topextra->inTopLevelResize); + Q_ASSERT(widget->isVisible() && widget->updatesEnabled()); + Q_ASSERT(widget->window() == tlw); + Q_ASSERT(!rect.isEmpty()); + +#ifndef QT_NO_GRAPHICSEFFECT + widget->d_func()->invalidateGraphicsEffectsRecursively(); +#endif //QT_NO_GRAPHICSEFFECT + + if (widget->d_func()->paintOnScreen()) { + if (widget->d_func()->dirty.isEmpty()) { + widget->d_func()->dirty = QRegion(rect); + sendUpdateRequest(widget, updateImmediately); + return; + } else if (qt_region_strictContains(widget->d_func()->dirty, rect)) { + if (updateImmediately) + sendUpdateRequest(widget, updateImmediately); + return; // Already dirty. + } + + const bool eventAlreadyPosted = !widget->d_func()->dirty.isEmpty(); + widget->d_func()->dirty += rect; + if (!eventAlreadyPosted || updateImmediately) + sendUpdateRequest(widget, updateImmediately); + return; + } + + if (fullUpdatePending) { + if (updateImmediately) + sendUpdateRequest(tlw, updateImmediately); + return; + } + + if (!windowSurface->hasFeature(QWindowSurface::PartialUpdates)) { + fullUpdatePending = true; + sendUpdateRequest(tlw, updateImmediately); + return; + } + + const QRect widgetRect = widget->d_func()->effectiveRectFor(rect); + const QRect translatedRect(widgetRect.translated(widget->mapTo(tlw, QPoint()))); + if (qt_region_strictContains(dirty, translatedRect)) { + if (updateImmediately) + sendUpdateRequest(tlw, updateImmediately); + return; // Already dirty + } + + if (invalidateBuffer) { + const bool eventAlreadyPosted = !dirty.isEmpty(); + dirty += translatedRect; + if (!eventAlreadyPosted || updateImmediately) + sendUpdateRequest(tlw, updateImmediately); + return; + } + + if (dirtyWidgets.isEmpty()) { + addDirtyWidget(widget, rect); + sendUpdateRequest(tlw, updateImmediately); + return; + } + + if (widget->d_func()->inDirtyList) { + if (!qt_region_strictContains(widget->d_func()->dirty, widgetRect)) + widget->d_func()->dirty += widgetRect; + } else { + addDirtyWidget(widget, rect); + } + + if (updateImmediately) + sendUpdateRequest(tlw, updateImmediately); +} + +/*! + Marks the \a region of the \a widget as dirty on screen. The \a region will be copied from + the backing store to the \a widget's native parent next time flush() is called. + + Paint on screen widgets are ignored. +*/ +void QWidgetBackingStore::markDirtyOnScreen(const QRegion ®ion, QWidget *widget, const QPoint &topLevelOffset) +{ + if (!widget || widget->d_func()->paintOnScreen() || region.isEmpty()) + return; + +#if defined(Q_WS_QWS) || defined(Q_WS_MAC) + if (!widget->testAttribute(Qt::WA_WState_InPaintEvent)) + dirtyOnScreen += region.translated(topLevelOffset); + return; +#endif + + // Top-level. + if (widget == tlw) { + if (!widget->testAttribute(Qt::WA_WState_InPaintEvent)) + dirtyOnScreen += region; + return; + } + + // Alien widgets. + if (!widget->internalWinId() && !widget->isWindow()) { + QWidget *nativeParent = widget->nativeParentWidget(); // Alien widgets with the top-level as the native parent (common case). + if (nativeParent == tlw) { + if (!widget->testAttribute(Qt::WA_WState_InPaintEvent)) + dirtyOnScreen += region.translated(topLevelOffset); + return; + } + + // Alien widgets with native parent != tlw. + QWidgetPrivate *nativeParentPrivate = nativeParent->d_func(); + if (!nativeParentPrivate->needsFlush) + nativeParentPrivate->needsFlush = new QRegion; + const QPoint nativeParentOffset = widget->mapTo(nativeParent, QPoint()); + *nativeParentPrivate->needsFlush += region.translated(nativeParentOffset); + appendDirtyOnScreenWidget(nativeParent); + return; + } + + // Native child widgets. + QWidgetPrivate *widgetPrivate = widget->d_func(); + if (!widgetPrivate->needsFlush) + widgetPrivate->needsFlush = new QRegion; + *widgetPrivate->needsFlush += region; + appendDirtyOnScreenWidget(widget); +} + +void QWidgetBackingStore::removeDirtyWidget(QWidget *w) +{ + if (!w) + return; + + dirtyWidgetsRemoveAll(w); + dirtyOnScreenWidgetsRemoveAll(w); + resetWidget(w); + + QWidgetPrivate *wd = w->d_func(); + const int n = wd->children.count(); + for (int i = 0; i < n; ++i) { + if (QWidget *child = qobject_cast<QWidget*>(wd->children.at(i))) + removeDirtyWidget(child); + } +} + +#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_MANAGER) +bool QWidgetBackingStore::hasDirtyWindowDecoration() const +{ + QTLWExtra *tlwExtra = tlw->d_func()->maybeTopData(); + if (tlwExtra && tlwExtra->qwsManager) + return !tlwExtra->qwsManager->d_func()->dirtyRegions.isEmpty(); + return false; +} + +void QWidgetBackingStore::paintWindowDecoration() +{ + if (!hasDirtyWindowDecoration()) + return; + + QDecoration &decoration = QApplication::qwsDecoration(); + const QRect decorationRect = tlw->rect(); + QRegion decorationRegion = decoration.region(tlw, decorationRect); + + QWSManagerPrivate *managerPrivate = tlw->d_func()->topData()->qwsManager->d_func(); + const bool doClipping = !managerPrivate->entireDecorationNeedsRepaint + && !managerPrivate->dirtyClip.isEmpty(); + + if (doClipping) { + decorationRegion &= static_cast<QWSWindowSurface *>(windowSurface)->clipRegion(); + decorationRegion &= managerPrivate->dirtyClip; + } + + if (decorationRegion.isEmpty()) + return; + + //### The QWS decorations do not always paint the pixels they promise to paint. + // This causes painting problems with QWSMemorySurface. Since none of the other + // window surfaces actually use the region, passing an empty region is a safe + // workaround. + + windowSurface->beginPaint(QRegion()); + + QPaintEngine *engine = windowSurface->paintDevice()->paintEngine(); + Q_ASSERT(engine); + const QRegion oldSystemClip(engine->systemClip()); + engine->setSystemClip(decorationRegion.translated(tlwOffset)); + + QPainter painter(windowSurface->paintDevice()); + painter.setFont(QApplication::font()); + painter.translate(tlwOffset); + + const int numDirty = managerPrivate->dirtyRegions.size(); + for (int i = 0; i < numDirty; ++i) { + const int area = managerPrivate->dirtyRegions.at(i); + + QRegion clipRegion = decoration.region(tlw, decorationRect, area); + if (!clipRegion.isEmpty()) { + // Decoration styles changes the clip and assumes the old clip is non-empty, + // so we have to set it, but in theory it shouldn't be required. + painter.setClipRegion(clipRegion); + decoration.paint(&painter, tlw, area, managerPrivate->dirtyStates.at(i)); + } + } + markDirtyOnScreen(decorationRegion, tlw, QPoint()); + + painter.end(); + windowSurface->endPaint(decorationRegion); + managerPrivate->clearDirtyRegions(); + engine->setSystemClip(oldSystemClip); +} +#endif + +void QWidgetBackingStore::updateLists(QWidget *cur) +{ + if (!cur) + return; + + QList<QObject*> children = cur->children(); + for (int i = 0; i < children.size(); ++i) { + QWidget *child = qobject_cast<QWidget*>(children.at(i)); + if (!child) + continue; + + updateLists(child); + } + + if (cur->testAttribute(Qt::WA_StaticContents)) + addStaticWidget(cur); + +#ifdef Q_BACKINGSTORE_SUBSURFACES + QTLWExtra *extra = cur->d_func()->maybeTopData(); + if (extra && extra->windowSurface && cur != tlw) + subSurfaces.append(extra->windowSurface); +#endif +} + +QWidgetBackingStore::QWidgetBackingStore(QWidget *topLevel) + : tlw(topLevel), dirtyOnScreenWidgets(0), hasDirtyFromPreviousSync(false) + , fullUpdatePending(0) +{ + windowSurface = tlw->windowSurface(); + if (!windowSurface) + windowSurface = topLevel->d_func()->createDefaultWindowSurface(); + + // The QWindowSurface constructor will call QWidget::setWindowSurface(), + // but automatically created surfaces should not be added to the topdata. +#ifdef Q_BACKINGSTORE_SUBSURFACES + Q_ASSERT(topLevel->d_func()->topData()->windowSurface == windowSurface); +#endif + topLevel->d_func()->topData()->windowSurface = 0; + + // Ensure all existing subsurfaces and static widgets are added to their respective lists. + updateLists(topLevel); +} + +QWidgetBackingStore::~QWidgetBackingStore() +{ + for (int c = 0; c < dirtyWidgets.size(); ++c) { + resetWidget(dirtyWidgets.at(c)); + } + + delete windowSurface; + windowSurface = 0; + delete dirtyOnScreenWidgets; + dirtyOnScreenWidgets = 0; +} + +//parent's coordinates; move whole rect; update parent and widget +//assume the screen blt has already been done, so we don't need to refresh that part +void QWidgetPrivate::moveRect(const QRect &rect, int dx, int dy) +{ + Q_Q(QWidget); + if (!q->isVisible() || (dx == 0 && dy == 0)) + return; + + QWidget *tlw = q->window(); + QTLWExtra* x = tlw->d_func()->topData(); + if (x->inTopLevelResize) + return; + + static int accelEnv = -1; + if (accelEnv == -1) { + accelEnv = qgetenv("QT_NO_FAST_MOVE").toInt() == 0; + } + + QWidget *pw = q->parentWidget(); + QPoint toplevelOffset = pw->mapTo(tlw, QPoint()); + QWidgetPrivate *pd = pw->d_func(); + QRect clipR(pd->clipRect()); +#ifdef Q_WS_QWS + QWidgetBackingStore *wbs = x->backingStore.data(); + QWSWindowSurface *surface = static_cast<QWSWindowSurface*>(wbs->windowSurface); + clipR = clipR.intersected(surface->clipRegion().translated(-toplevelOffset).boundingRect()); +#endif + const QRect newRect(rect.translated(dx, dy)); + QRect destRect = rect.intersected(clipR); + if (destRect.isValid()) + destRect = destRect.translated(dx, dy).intersected(clipR); + const QRect sourceRect(destRect.translated(-dx, -dy)); + const QRect parentRect(rect & clipR); + + bool accelerateMove = accelEnv && isOpaque +#ifndef QT_NO_GRAPHICSVIEW + // No accelerate move for proxy widgets. + && !tlw->d_func()->extra->proxyWidget +#endif + && !isOverlapped(sourceRect) && !isOverlapped(destRect); + + if (!accelerateMove) { + QRegion parentR(effectiveRectFor(parentRect)); + if (!extra || !extra->hasMask) { + parentR -= newRect; + } else { + // invalidateBuffer() excludes anything outside the mask + parentR += newRect & clipR; + } + pd->invalidateBuffer(parentR); + invalidateBuffer((newRect & clipR).translated(-data.crect.topLeft())); + } else { + + QWidgetBackingStore *wbs = x->backingStore.data(); + QRegion childExpose(newRect & clipR); + + if (sourceRect.isValid() && wbs->bltRect(sourceRect, dx, dy, pw)) + childExpose -= destRect; + + if (!pw->updatesEnabled()) + return; + + const bool childUpdatesEnabled = q->updatesEnabled(); + if (childUpdatesEnabled && !childExpose.isEmpty()) { + childExpose.translate(-data.crect.topLeft()); + wbs->markDirty(childExpose, q); + isMoved = true; + } + + QRegion parentExpose(parentRect); + parentExpose -= newRect; + if (extra && extra->hasMask) + parentExpose += QRegion(newRect) - extra->mask.translated(data.crect.topLeft()); + + if (!parentExpose.isEmpty()) { + wbs->markDirty(parentExpose, pw); + pd->isMoved = true; + } + + if (childUpdatesEnabled) { + QRegion needsFlush(sourceRect); + needsFlush += destRect; + wbs->markDirtyOnScreen(needsFlush, pw, toplevelOffset); + } + } +} + +//widget's coordinates; scroll within rect; only update widget +void QWidgetPrivate::scrollRect(const QRect &rect, int dx, int dy) +{ + Q_Q(QWidget); + QWidget *tlw = q->window(); + QTLWExtra* x = tlw->d_func()->topData(); + if (x->inTopLevelResize) + return; + + QWidgetBackingStore *wbs = x->backingStore.data(); + if (!wbs) + return; + + static int accelEnv = -1; + if (accelEnv == -1) { + accelEnv = qgetenv("QT_NO_FAST_SCROLL").toInt() == 0; + } + + QRect scrollRect = rect & clipRect(); + bool overlapped = false; + bool accelerateScroll = accelEnv && isOpaque + && !(overlapped = isOverlapped(scrollRect.translated(data.crect.topLeft()))); + +#if defined(Q_WS_QWS) + QWSWindowSurface *surface; + surface = static_cast<QWSWindowSurface*>(wbs->windowSurface); + + if (accelerateScroll && !surface->isBuffered()) { + const QRegion surfaceClip = surface->clipRegion(); + const QRegion outsideClip = QRegion(rect) - surfaceClip; + if (!outsideClip.isEmpty()) { + const QVector<QRect> clipped = (surfaceClip & rect).rects(); + if (clipped.size() < 8) { + for (int i = 0; i < clipped.size(); ++i) + this->scrollRect(clipped.at(i), dx, dy); + return; + } else { + accelerateScroll = false; + } + } + } +#endif // Q_WS_QWS + + if (!accelerateScroll) { + if (overlapped) { + QRegion region(scrollRect); + subtractOpaqueSiblings(region); + invalidateBuffer(region); + }else { + invalidateBuffer(scrollRect); + } + } else { + const QPoint toplevelOffset = q->mapTo(tlw, QPoint()); +#ifdef Q_WS_QWS + QWSWindowSurface *surface = static_cast<QWSWindowSurface*>(wbs->windowSurface); + const QRegion clip = surface->clipRegion().translated(-toplevelOffset) & scrollRect; + const QRect clipBoundingRect = clip.boundingRect(); + scrollRect &= clipBoundingRect; +#endif + const QRect destRect = scrollRect.translated(dx, dy) & scrollRect; + const QRect sourceRect = destRect.translated(-dx, -dy); + + QRegion childExpose(scrollRect); + if (sourceRect.isValid()) { + if (wbs->bltRect(sourceRect, dx, dy, q)) + childExpose -= destRect; + } + + if (inDirtyList) { + if (rect == q->rect()) { + dirty.translate(dx, dy); + } else { + QRegion dirtyScrollRegion = dirty.intersected(scrollRect); + if (!dirtyScrollRegion.isEmpty()) { + dirty -= dirtyScrollRegion; + dirtyScrollRegion.translate(dx, dy); + dirty += dirtyScrollRegion; + } + } + } + + if (!q->updatesEnabled()) + return; + + if (!childExpose.isEmpty()) { + wbs->markDirty(childExpose, q); + isScrolled = true; + } + + // Instead of using native scroll-on-screen, we copy from + // backingstore, giving only one screen update for each + // scroll, and a solid appearance + wbs->markDirtyOnScreen(destRect, q, toplevelOffset); + } +} + +static inline bool discardSyncRequest(QWidget *tlw, QTLWExtra *tlwExtra) +{ + if (!tlw || !tlwExtra) + return true; + +#ifdef Q_WS_X11 + // Delay the sync until we get an Expose event from X11 (initial show). + // Qt::WA_Mapped is set to true, but the actual mapping has not yet occurred. + // However, we must repaint immediately regardless of the state if someone calls repaint(). + if (tlwExtra->waitingForMapNotify && !tlwExtra->inRepaint) + return true; +#endif + + if (!tlw->testAttribute(Qt::WA_Mapped)) + return true; + + if (!tlw->isVisible() +#ifndef Q_WS_X11 + // If we're minimized on X11, WA_Mapped will be false and we + // will return in the case above. Some window managers on X11 + // sends us the PropertyNotify to change the minimized state + // *AFTER* we've received the expose event, which is baaad. + || tlw->isMinimized() +#endif + ) + return true; + + return false; +} + +/*! + Synchronizes the \a exposedRegion of the \a exposedWidget with the backing store. + + If there's nothing to repaint, the area is flushed and painting does not occur; + otherwise the area is marked as dirty on screen and will be flushed right after + we are done with all painting. +*/ +void QWidgetBackingStore::sync(QWidget *exposedWidget, const QRegion &exposedRegion) +{ + QTLWExtra *tlwExtra = tlw->d_func()->maybeTopData(); + if (discardSyncRequest(tlw, tlwExtra) || tlwExtra->inTopLevelResize) + return; + + if (!exposedWidget || !exposedWidget->internalWinId() || !exposedWidget->isVisible() + || !exposedWidget->updatesEnabled() || exposedRegion.isEmpty()) { + return; + } + + // If there's no preserved contents support we always need + // to do a full repaint before flushing + if (!windowSurface->hasFeature(QWindowSurface::PreservedContents)) + fullUpdatePending = true; + + // Nothing to repaint. + if (!isDirty()) { + qt_flush(exposedWidget, exposedRegion, windowSurface, tlw, tlwOffset); + return; + } + + if (exposedWidget != tlw) + markDirtyOnScreen(exposedRegion, exposedWidget, exposedWidget->mapTo(tlw, QPoint())); + else + markDirtyOnScreen(exposedRegion, exposedWidget, QPoint()); + sync(); +} + +/*! + 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(topLevelRect()); +#ifdef Q_WS_QPA + const QRect surfaceGeometry(tlwRect.topLeft(), windowSurface->size()); +#else + const QRect surfaceGeometry(windowSurface->geometry()); +#endif + 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; + } + } + +#ifdef Q_WS_QPA + if (inTopLevelResize || surfaceGeometry.size() != tlwRect.size()) + windowSurface->resize(tlwRect.size()); +#else + if (inTopLevelResize || surfaceGeometry != tlwRect) + windowSurface->setGeometry(tlwRect); +#endif + + 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 +} + +/*! + Flushes the contents of the backing store into the top-level widget. + If the \a widget is non-zero, the content is flushed to the \a widget. + If the \a surface is non-zero, the content of the \a surface is flushed. +*/ +void QWidgetBackingStore::flush(QWidget *widget, QWindowSurface *surface) +{ +#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_MANAGER) + paintWindowDecoration(); +#endif + + if (!dirtyOnScreen.isEmpty()) { + QWidget *target = widget ? widget : tlw; + QWindowSurface *source = surface ? surface : windowSurface; + qt_flush(target, dirtyOnScreen, source, tlw, tlwOffset); + dirtyOnScreen = QRegion(); + } + + if (!dirtyOnScreenWidgets || dirtyOnScreenWidgets->isEmpty()) + return; + + for (int i = 0; i < dirtyOnScreenWidgets->size(); ++i) { + QWidget *w = dirtyOnScreenWidgets->at(i); + QWidgetPrivate *wd = w->d_func(); + Q_ASSERT(wd->needsFlush); + qt_flush(w, *wd->needsFlush, windowSurface, tlw, tlwOffset); + *wd->needsFlush = QRegion(); + } + dirtyOnScreenWidgets->clear(); +} + +static inline bool discardInvalidateBufferRequest(QWidget *widget, QTLWExtra *tlwExtra) +{ + Q_ASSERT(widget); + if (QApplication::closingDown()) + return true; + + if (!tlwExtra || tlwExtra->inTopLevelResize || !tlwExtra->backingStore) + return true; + + if (!widget->isVisible() || !widget->updatesEnabled()) + return true; + + return false; +} + +/*! + Invalidates the buffer when the widget is resized. + Static areas are never invalidated unless absolutely needed. +*/ +void QWidgetPrivate::invalidateBuffer_resizeHelper(const QPoint &oldPos, const QSize &oldSize) +{ + Q_Q(QWidget); + Q_ASSERT(!q->isWindow()); + Q_ASSERT(q->parentWidget()); + + const bool staticContents = q->testAttribute(Qt::WA_StaticContents); + const bool sizeDecreased = (data.crect.width() < oldSize.width()) + || (data.crect.height() < oldSize.height()); + + const QPoint offset(data.crect.x() - oldPos.x(), data.crect.y() - oldPos.y()); + const bool parentAreaExposed = !offset.isNull() || sizeDecreased; + const QRect newWidgetRect(q->rect()); + const QRect oldWidgetRect(0, 0, oldSize.width(), oldSize.height()); + + if (!staticContents || graphicsEffect) { + QRegion staticChildren; + QWidgetBackingStore *bs = 0; + if (offset.isNull() && (bs = maybeBackingStore())) + staticChildren = bs->staticContents(q, oldWidgetRect); + const bool hasStaticChildren = !staticChildren.isEmpty(); + + if (hasStaticChildren) { + QRegion dirty(newWidgetRect); + dirty -= staticChildren; + invalidateBuffer(dirty); + } else { + // Entire widget needs repaint. + invalidateBuffer(newWidgetRect); + } + + if (!parentAreaExposed) + return; + + // Invalidate newly exposed area of the parent. + if (!graphicsEffect && extra && extra->hasMask) { + QRegion parentExpose(extra->mask.translated(oldPos)); + parentExpose &= QRect(oldPos, oldSize); + if (hasStaticChildren) + parentExpose -= data.crect; // Offset is unchanged, safe to do this. + q->parentWidget()->d_func()->invalidateBuffer(parentExpose); + } else { + if (hasStaticChildren && !graphicsEffect) { + QRegion parentExpose(QRect(oldPos, oldSize)); + parentExpose -= data.crect; // Offset is unchanged, safe to do this. + q->parentWidget()->d_func()->invalidateBuffer(parentExpose); + } else { + q->parentWidget()->d_func()->invalidateBuffer(effectiveRectFor(QRect(oldPos, oldSize))); + } + } + return; + } + + // Move static content to its new position. + if (!offset.isNull()) { + if (sizeDecreased) { + const QSize minSize(qMin(oldSize.width(), data.crect.width()), + qMin(oldSize.height(), data.crect.height())); + moveRect(QRect(oldPos, minSize), offset.x(), offset.y()); + } else { + moveRect(QRect(oldPos, oldSize), offset.x(), offset.y()); + } + } + + // Invalidate newly visible area of the widget. + if (!sizeDecreased || !oldWidgetRect.contains(newWidgetRect)) { + QRegion newVisible(newWidgetRect); + newVisible -= oldWidgetRect; + invalidateBuffer(newVisible); + } + + if (!parentAreaExposed) + return; + + // Invalidate newly exposed area of the parent. + const QRect oldRect(oldPos, oldSize); + if (extra && extra->hasMask) { + QRegion parentExpose(oldRect); + parentExpose &= extra->mask.translated(oldPos); + parentExpose -= (extra->mask.translated(data.crect.topLeft()) & data.crect); + q->parentWidget()->d_func()->invalidateBuffer(parentExpose); + } else { + QRegion parentExpose(oldRect); + parentExpose -= data.crect; + q->parentWidget()->d_func()->invalidateBuffer(parentExpose); + } +} + +/*! + Invalidates the \a rgn (in widget's coordinates) of the backing store, i.e. + all widgets intersecting with the region will be repainted when the backing store + is synced. + + ### Qt 4.6: Merge into a template function (after MSVC isn't supported anymore). +*/ +void QWidgetPrivate::invalidateBuffer(const QRegion &rgn) +{ + Q_Q(QWidget); + + QTLWExtra *tlwExtra = q->window()->d_func()->maybeTopData(); + if (discardInvalidateBufferRequest(q, tlwExtra) || rgn.isEmpty()) + return; + + QRegion wrgn(rgn); + wrgn &= clipRect(); + if (!graphicsEffect && extra && extra->hasMask) + wrgn &= extra->mask; + if (wrgn.isEmpty()) + return; + + tlwExtra->backingStore->markDirty(wrgn, q, false, true); +} + +/*! + This function is equivalent to calling invalidateBuffer(QRegion(rect), ...), but + is more efficient as it eliminates QRegion operations/allocations and can + use the rect more precisely for additional cut-offs. + + ### Qt 4.6: Merge into a template function (after MSVC isn't supported anymore). +*/ +void QWidgetPrivate::invalidateBuffer(const QRect &rect) +{ + Q_Q(QWidget); + + QTLWExtra *tlwExtra = q->window()->d_func()->maybeTopData(); + if (discardInvalidateBufferRequest(q, tlwExtra) || rect.isEmpty()) + return; + + QRect wRect(rect); + wRect &= clipRect(); + if (wRect.isEmpty()) + return; + + if (graphicsEffect || !extra || !extra->hasMask) { + tlwExtra->backingStore->markDirty(wRect, q, false, true); + return; + } + + QRegion wRgn(extra->mask); + wRgn &= wRect; + if (wRgn.isEmpty()) + return; + + tlwExtra->backingStore->markDirty(wRgn, q, false, true); +} + +void QWidgetPrivate::repaint_sys(const QRegion &rgn) +{ + if (data.in_destructor) + return; + + Q_Q(QWidget); + if (q->testAttribute(Qt::WA_StaticContents)) { + if (!extra) + createExtra(); + extra->staticContentsSize = data.crect.size(); + } + +#ifdef Q_WS_QPA //Dont even call q->p + QPaintEngine *engine = 0; +#else + QPaintEngine *engine = q->paintEngine(); +#endif + // QGLWidget does not support partial updates if: + // 1) The context is double buffered + // 2) The context is single buffered and auto-fill background is enabled. + const bool noPartialUpdateSupport = (engine && (engine->type() == QPaintEngine::OpenGL + || engine->type() == QPaintEngine::OpenGL2)) + && (usesDoubleBufferedGLContext || q->autoFillBackground()); + QRegion toBePainted(noPartialUpdateSupport ? q->rect() : rgn); + +#ifdef Q_WS_MAC + // No difference between update() and repaint() on the Mac. + update_sys(toBePainted); + return; +#endif + + toBePainted &= clipRect(); + clipToEffectiveMask(toBePainted); + if (toBePainted.isEmpty()) + return; // Nothing to repaint. + +#ifndef QT_NO_PAINT_DEBUG + bool flushed = QWidgetBackingStore::flushPaint(q, toBePainted); +#endif + + drawWidget(q, toBePainted, QPoint(), QWidgetPrivate::DrawAsRoot | QWidgetPrivate::DrawPaintOnScreen, 0); + +#ifndef QT_NO_PAINT_DEBUG + if (flushed) + QWidgetBackingStore::unflushPaint(q, toBePainted); +#endif + + if (!q->testAttribute(Qt::WA_PaintOutsidePaintEvent) && q->paintingActive()) + qWarning("QWidget::repaint: It is dangerous to leave painters active on a widget outside of the PaintEvent"); +} + + +QT_END_NAMESPACE |