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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 "qguiglcontext_qpa.h"
#include "qwindow.h"
#include <QtCore/QThreadStorage>
#include <QtCore/QThread>
#include <QtGui/private/qguiapplication_p.h>
#include <QDebug>
class QGuiGLThreadContext
{
public:
~QGuiGLThreadContext() {
if (context)
context->doneCurrent();
}
QGuiGLContext *context;
};
static QThreadStorage<QGuiGLThreadContext *> qwindow_context_storage;
class QGuiGLContextPrivate
{
public:
QGuiGLContextPrivate()
: qGLContextHandle(0)
, platformGLContext(0)
, shareContext(0)
{
}
virtual ~QGuiGLContextPrivate()
{
//do not delete the QGLContext handle here as it is deleted in
//QWidgetPrivate::deleteTLSysExtra()
}
void *qGLContextHandle;
void (*qGLContextDeleteFunction)(void *handle);
QPlatformGLContext *platformGLContext;
QGuiGLContext *shareContext;
static void setCurrentContext(QGuiGLContext *context);
};
void QGuiGLContextPrivate::setCurrentContext(QGuiGLContext *context)
{
QGuiGLThreadContext *threadContext = qwindow_context_storage.localData();
if (!threadContext) {
if (!QThread::currentThread()) {
qWarning("No QTLS available. currentContext wont work");
return;
}
threadContext = new QGuiGLThreadContext;
qwindow_context_storage.setLocalData(threadContext);
}
threadContext->context = context;
}
/*!
Returns the last context which called makeCurrent. This function is thread aware.
*/
QGuiGLContext* QGuiGLContext::currentContext()
{
QGuiGLThreadContext *threadContext = qwindow_context_storage.localData();
if(threadContext) {
return threadContext->context;
}
return 0;
}
QPlatformGLContext *QGuiGLContext::handle() const
{
Q_D(const QGuiGLContext);
return d->platformGLContext;
}
/*!
Creates a new GL context with the given format and shared context.
*/
QGuiGLContext::QGuiGLContext(const QGuiGLFormat &format, QGuiGLContext *shareContext)
: d_ptr(new QGuiGLContextPrivate())
{
Q_D(QGuiGLContext);
QPlatformGLContext *share = shareContext ? shareContext->handle() : 0;
d->shareContext = shareContext;
d->platformGLContext = QGuiApplicationPrivate::platformIntegration()->createPlatformGLContext(format, share);
}
/*!
If this is the current context for the thread, doneCurrent is called
*/
QGuiGLContext::~QGuiGLContext()
{
Q_D(QGuiGLContext);
if (QGuiGLContext::currentContext() == this)
doneCurrent();
delete d->platformGLContext;
}
bool QGuiGLContext::isValid() const
{
Q_D(const QGuiGLContext);
return d->platformGLContext != 0;
}
/*!
If surface is 0 this is equivalent to calling doneCurrent().
*/
bool QGuiGLContext::makeCurrent(QPlatformGLSurface *surface)
{
Q_D(QGuiGLContext);
if (!d->platformGLContext)
return false;
if (!surface) {
doneCurrent();
return true;
}
if (d->platformGLContext->makeCurrent(*surface)) {
QGuiGLContextPrivate::setCurrentContext(this);
return true;
}
return false;
}
/*!
Convenience function for calling makeCurrent with a 0 surface.
*/
void QGuiGLContext::doneCurrent()
{
Q_D(QGuiGLContext);
if (!d->platformGLContext)
return;
d->platformGLContext->doneCurrent();
QGuiGLContextPrivate::setCurrentContext(0);
}
void QGuiGLContext::swapBuffers(QPlatformGLSurface *surface)
{
Q_D(QGuiGLContext);
if (!d->platformGLContext)
return;
if (!surface) {
qWarning() << "QGuiGLContext::swapBuffers() called with null argument";
return;
}
d->platformGLContext->swapBuffers(*surface);
}
void (*QGuiGLContext::getProcAddress(const QByteArray &procName)) ()
{
Q_D(QGuiGLContext);
if (!d->platformGLContext)
return 0;
return d->platformGLContext->getProcAddress(procName);
}
QGuiGLFormat QGuiGLContext::format() const
{
Q_D(const QGuiGLContext);
if (!d->platformGLContext)
return QGuiGLFormat();
return d->platformGLContext->format();
}
QGuiGLContext *QGuiGLContext::shareContext() const
{
Q_D(const QGuiGLContext);
if (!d->platformGLContext)
return 0;
return d->shareContext;
}
/*
internal: Needs to have a pointer to qGLContext. But since this is in QtGui we cant
have any type information.
*/
void *QGuiGLContext::qGLContextHandle() const
{
Q_D(const QGuiGLContext);
return d->qGLContextHandle;
}
void QGuiGLContext::setQGLContextHandle(void *handle,void (*qGLContextDeleteFunction)(void *))
{
Q_D(QGuiGLContext);
d->qGLContextHandle = handle;
d->qGLContextDeleteFunction = qGLContextDeleteFunction;
}
void QGuiGLContext::deleteQGLContext()
{
Q_D(QGuiGLContext);
if (d->qGLContextDeleteFunction && d->qGLContextHandle) {
d->qGLContextDeleteFunction(d->qGLContextHandle);
d->qGLContextDeleteFunction = 0;
d->qGLContextHandle = 0;
}
}
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