153 lines
4.2 KiB
C++
153 lines
4.2 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2011 Arthur Arlt <a.arlt@stud.uni-heidelberg.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "overlaywindow.h"
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#include <config-X11.h>
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#include "kwinglobals.h"
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#include "assert.h"
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#include <QtCore/QVector>
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#include <X11/extensions/shape.h>
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#include <X11/extensions/Xcomposite.h>
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#if XCOMPOSITE_MAJOR > 0 || XCOMPOSITE_MINOR >= 3
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#define KWIN_HAVE_XCOMPOSITE_OVERLAY
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#endif
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namespace KWin {
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OverlayWindow::OverlayWindow()
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: m_visible(true)
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, m_shown(false)
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, m_window(None)
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{
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}
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OverlayWindow::~OverlayWindow()
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{
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}
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bool OverlayWindow::create()
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{
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assert(m_window == None);
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if (!Extensions::compositeOverlayAvailable())
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return false;
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if (!Extensions::shapeInputAvailable()) // needed in setupOverlay()
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return false;
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#ifdef KWIN_HAVE_XCOMPOSITE_OVERLAY
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m_window = XCompositeGetOverlayWindow(display(), rootWindow());
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if (m_window == None)
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return false;
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XResizeWindow(display(), m_window, displayWidth(), displayHeight());
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return true;
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#else
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return false;
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#endif
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}
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void OverlayWindow::setup(Window window)
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{
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assert(m_window != None);
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assert(Extensions::shapeInputAvailable());
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XSetWindowBackgroundPixmap(display(), m_window, None);
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m_shape = QRegion();
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setShape(QRect(0, 0, displayWidth(), displayHeight()));
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if (window != None) {
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XSetWindowBackgroundPixmap(display(), window, None);
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XShapeCombineRectangles(display(), window, ShapeInput, 0, 0, NULL, 0, ShapeSet, Unsorted);
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}
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XSelectInput(display(), m_window, VisibilityChangeMask);
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}
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void OverlayWindow::show()
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{
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assert(m_window != None);
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if (m_shown)
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return;
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XMapSubwindows(display(), m_window);
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XMapWindow(display(), m_window);
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m_shown = true;
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}
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void OverlayWindow::hide()
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{
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assert(m_window != None);
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XUnmapWindow(display(), m_window);
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m_shown = false;
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setShape(QRect(0, 0, displayWidth(), displayHeight()));
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}
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void OverlayWindow::setShape(const QRegion& reg)
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{
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// Avoid setting the same shape again, it causes flicker (apparently it is not a no-op
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// and triggers something).
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if (reg == m_shape)
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return;
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QVector< QRect > rects = reg.rects();
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XRectangle* xrects = new XRectangle[ rects.count()];
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for (int i = 0;
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i < rects.count();
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++i) {
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xrects[ i ].x = rects[ i ].x();
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xrects[ i ].y = rects[ i ].y();
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xrects[ i ].width = rects[ i ].width();
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xrects[ i ].height = rects[ i ].height();
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}
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XShapeCombineRectangles(display(), m_window, ShapeBounding, 0, 0,
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xrects, rects.count(), ShapeSet, Unsorted);
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delete[] xrects;
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XShapeCombineRectangles(display(), m_window, ShapeInput, 0, 0, NULL, 0, ShapeSet, Unsorted);
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m_shape = reg;
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}
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bool OverlayWindow::isVisible()
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{
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return m_visible;
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}
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void OverlayWindow::setVisibility(bool visible)
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{
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m_visible = visible;
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}
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void OverlayWindow::destroy()
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{
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if (m_window == None)
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return;
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// reset the overlay shape
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XRectangle rec = { 0, 0, displayWidth(), displayHeight() };
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XShapeCombineRectangles(display(), m_window, ShapeBounding, 0, 0, &rec, 1, ShapeSet, Unsorted);
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XShapeCombineRectangles(display(), m_window, ShapeInput, 0, 0, &rec, 1, ShapeSet, Unsorted);
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#ifdef KWIN_HAVE_XCOMPOSITE_OVERLAY
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XCompositeReleaseOverlayWindow(display(), m_window);
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#endif
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m_window = None;
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m_shown = false;
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}
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Window OverlayWindow::window()
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{
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return m_window;
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}
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} // namespace KWin
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