66d22738e4
Without Compositing we do not really need the PaintRedirector, it only adds overhead. This reverts the behavior to how it was before the PaintRedirector was introduced by just not redirecting the paint in the event filter when compositing is not active. This should have the lowest impact on the existing source base. The change breaks at least oxygen window decoration when compositing is not active as the decoration is no longer double buffered. But as written this is exactly the behavior as used before 4.3. Given the push today there should be enough time for all affected decos to adjust to the change. REVIEW: 101413
145 lines
4.4 KiB
C++
145 lines
4.4 KiB
C++
/*****************************************************************
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This file is part of the KDE project.
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Copyright (C) 2009 Lubos Lunak <l.lunak@kde.org>
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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******************************************************************/
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#include "paintredirector.h"
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#include <kdebug.h>
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#include <qevent.h>
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#include <qpainter.h>
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#include <qmath.h>
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#include "utils.h"
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namespace KWin
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{
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PaintRedirector::PaintRedirector(QWidget* w)
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: widget(w)
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, recursionCheck(false)
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{
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timer.setSingleShot(true);
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connect(&timer, SIGNAL(timeout()), SIGNAL(paintPending()));
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added(w);
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}
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QPixmap PaintRedirector::performPendingPaint()
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{
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//qDebug() << "### performing paint, pending:" << pending.boundingRect();
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const QSize size = pending.boundingRect().size();
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if (scratch.width() < size.width() || scratch.height() < size.height()) {
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int w = (size.width() + 128) & ~128;
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int h = (size.height() + 128) & ~128;
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scratch = QPixmap(qMax(scratch.width(), w), qMax(scratch.height(), h));
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}
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scratch.fill(Qt::transparent);
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recursionCheck = true;
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// do not use DrawWindowBackground, it's ok to be transparent
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widget->render(&scratch, QPoint(), pending.boundingRect(), QWidget::DrawChildren);
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recursionCheck = false;
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pending = QRegion();
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scheduled = QRegion();
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cleanupTimer.start(2000, this);
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return scratch;
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}
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bool PaintRedirector::isToolTip(QWidget *object) const
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{
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// ### We need a more reliable way of doing this
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return object->windowFlags() & Qt::ToolTip;
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}
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bool PaintRedirector::eventFilter(QObject* o, QEvent* e)
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{
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switch(e->type()) {
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case QEvent::ChildAdded: {
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QChildEvent* c = static_cast< QChildEvent* >(e);
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if (c->child()->isWidgetType() && !isToolTip(static_cast< QWidget* >(c->child())))
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added(static_cast< QWidget* >(c->child()));
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break;
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}
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case QEvent::ChildRemoved: {
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QChildEvent* c = static_cast< QChildEvent* >(e);
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if (c->child()->isWidgetType())
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removed(static_cast< QWidget* >(c->child()));
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break;
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}
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case QEvent::Paint: {
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if (!compositing()) {
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return false;
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}
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if (!recursionCheck) {
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QPaintEvent* pe = static_cast< QPaintEvent* >(e);
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QWidget* w = static_cast< QWidget* >(o);
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pending |= pe->region().translated(w->mapTo(widget, QPoint(0, 0)));
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scheduled = pending;
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timer.start(0);
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return true; // filter out
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}
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}
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default:
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break;
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}
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return false;
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}
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QRegion PaintRedirector::pendingRegion() const
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{
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return pending;
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}
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QRegion PaintRedirector::scheduledRepaintRegion()
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{
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QRegion tempRegion = scheduled;
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scheduled = QRegion();
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return tempRegion;
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}
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void PaintRedirector::added(QWidget* w)
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{
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w->installEventFilter(this);
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foreach (QObject * o, w->children()) {
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if (o->isWidgetType() && !isToolTip(static_cast< QWidget* >(o)))
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added(static_cast< QWidget* >(o));
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}
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}
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void PaintRedirector::removed(QWidget* w)
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{
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foreach (QObject * o, w->children()) {
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if (o->isWidgetType())
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removed(static_cast< QWidget* >(o));
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}
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w->installEventFilter(this);
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}
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void PaintRedirector::timerEvent(QTimerEvent* event)
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{
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if (event->timerId() == cleanupTimer.timerId()) {
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cleanupTimer.stop();
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scratch = QPixmap();
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}
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}
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} // namespace
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#include "paintredirector.moc"
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