File indexing completed on 2024-04-28 05:47:26

 /*****************************************************************************
  *   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();
 }
 
 }
 }