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/*****************************************************************************
* Copyright 2007 - 2010 Craig Drummond <craig.p.drummond@gmail.com> *
* Copyright 2013 - 2015 Yichao Yu <yyc1992@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 2.1 of the *
* License, or (at your option) version 3, or any later version accepted *
* by the membership of KDE e.V. (or its successor approved by the *
* membership of KDE e.V.), which shall act as a proxy defined in *
* Section 6 of version 3 of the license. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library. If not, *
* see <http://www.gnu.org/licenses/>. *
*****************************************************************************/
#include <qtcurve-utils/log.h>
#include "utils.h"
#include <qtcurve-utils/x11utils.h>
#include <qtcurve-utils/qtutils.h>
#include <QApplication>
#include <QDesktopWidget>
#include <QWindow>
#ifdef QTC_QT5_ENABLE_KDE
# include <kwindowsystem.h>
#endif
namespace QtCurve {
namespace Utils {
bool
compositingActive()
{
#ifndef QTC_QT5_ENABLE_KDE
// DO NOT condition compile on QTC_ENABLE_X11.
// There's no direct linkage on X11 and the following code will just do
// nothing if X11 is not enabled (either at compile time or at run time).
return qtcX11CompositingActive();
#else
return KWindowSystem::compositingActive();
#endif
}
static inline WId
findWid(const QWidget *w)
{
do {
WId wid = qtcGetWid(w);
if (wid || w->isWindow()) {
return wid;
}
} while ((w = w->parentWidget()));
return (WId)0;
}
static QWindow*
findWindowHandle(const QWidget *w)
{
do {
QWindow *window = w->windowHandle();
if (window || w->isWindow()) {
return window;
}
} while ((w = w->parentWidget()));
return nullptr;
}
bool
hasAlphaChannel(const QWidget *widget)
{
if (!widget)
return false;
if (QWindow *window = findWindowHandle(widget)) {
return window->format().alphaBufferSize() > 0;
}
// DO NOT condition compile on QTC_ENABLE_X11.
// There's no direct linkage on X11 and the following code will just do
// nothing if X11 is not enabled (either at compile time or at run time).
if (qtcX11Enabled()) {
if (WId wid = findWid(widget)) {
return qtcX11HasAlpha(wid);
}
}
return compositingActive();
}
}
}
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