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/****************************************************************************
**
** 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 QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qplatformglcontext_qpa.h"
#include "qwindowcontext_qpa.h"
#include "qwindow.h"
#include <QtCore/QThreadStorage>
#include <QtCore/QThread>
#include <QDebug>
class QWindowThreadContext
{
public:
~QWindowThreadContext() {
if (context)
context->doneCurrent();
}
QWindowContext *context;
};
static QThreadStorage<QWindowThreadContext *> qwindow_context_storage;
class QWindowContextPrivate
{
public:
QWindowContextPrivate()
:qGLContextHandle(0)
{
}
virtual ~QWindowContextPrivate()
{
//do not delete the QGLContext handle here as it is deleted in
//QWidgetPrivate::deleteTLSysExtra()
}
void *qGLContextHandle;
void (*qGLContextDeleteFunction)(void *handle);
QPlatformGLContext *platformGLContext;
static QWindowContext *staticSharedContext;
static void setCurrentContext(QWindowContext *context);
};
QWindowContext *QWindowContextPrivate::staticSharedContext = 0;
void QWindowContextPrivate::setCurrentContext(QWindowContext *context)
{
QWindowThreadContext *threadContext = qwindow_context_storage.localData();
if (!threadContext) {
if (!QThread::currentThread()) {
qWarning("No QTLS available. currentContext wont work");
return;
}
threadContext = new QWindowThreadContext;
qwindow_context_storage.setLocalData(threadContext);
}
threadContext->context = context;
}
/*!
Returns the last context which called makeCurrent. This function is thread aware.
*/
QWindowContext* QWindowContext::currentContext()
{
QWindowThreadContext *threadContext = qwindow_context_storage.localData();
if(threadContext) {
return threadContext->context;
}
return 0;
}
QPlatformGLContext *QWindowContext::handle() const
{
Q_D(const QWindowContext);
return d->platformGLContext;
}
/*!
All subclasses needs to specify the platformWindow. It can be a null window.
*/
QWindowContext::QWindowContext(QWindow *window)
:d_ptr(new QWindowContextPrivate())
{
Q_D(QWindowContext);
Q_ASSERT(window);
if (!window->handle())
window->create();
d->platformGLContext = window->handle()->glContext();
}
/*!
If this is the current context for the thread, doneCurrent is called
*/
QWindowContext::~QWindowContext()
{
if (QWindowContext::currentContext() == this) {
doneCurrent();
}
}
/*!
Reimplement in subclass to do makeCurrent on native GL context
*/
void QWindowContext::makeCurrent()
{
Q_D(QWindowContext);
QWindowContextPrivate::setCurrentContext(this);
d->platformGLContext->makeCurrent();
}
/*!
Reimplement in subclass to release current context.
Typically this is calling makeCurrent with 0 "surface"
*/
void QWindowContext::doneCurrent()
{
Q_D(QWindowContext);
d->platformGLContext->doneCurrent();
QWindowContextPrivate::setCurrentContext(0);
}
void QWindowContext::swapBuffers()
{
Q_D(QWindowContext);
d->platformGLContext->swapBuffers();
}
void (*QWindowContext::getProcAddress(const QByteArray &procName)) ()
{
Q_D(QWindowContext);
void *result = d->platformGLContext->getProcAddress(QString::fromAscii(procName.constData()));
return (void (*)())result;
}
/*
internal: Needs to have a pointer to qGLContext. But since this is in QtGui we cant
have any type information.
*/
void *QWindowContext::qGLContextHandle() const
{
Q_D(const QWindowContext);
return d->qGLContextHandle;
}
void QWindowContext::setQGLContextHandle(void *handle,void (*qGLContextDeleteFunction)(void *))
{
Q_D(QWindowContext);
d->qGLContextHandle = handle;
d->qGLContextDeleteFunction = qGLContextDeleteFunction;
}
void QWindowContext::deleteQGLContext()
{
Q_D(QWindowContext);
if (d->qGLContextDeleteFunction && d->qGLContextHandle) {
d->qGLContextDeleteFunction(d->qGLContextHandle);
d->qGLContextDeleteFunction = 0;
d->qGLContextHandle = 0;
}
}
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