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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 plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qwaylandglcontext.h"

#include "qwaylanddisplay.h"
#include "qwaylandwindow.h"
#include "qwaylandeglwindow.h"

#include <QtPlatformSupport/private/qeglconvenience_p.h>

#include <QtGui/QPlatformGLContext>
#include <QtGui/QSurfaceFormat>
#include <QtCore/QMutex>

QWaylandGLContext::QWaylandGLContext(EGLDisplay eglDisplay, const QSurfaceFormat &format, QPlatformGLContext *share)
    : QPlatformGLContext()
    , m_eglDisplay(eglDisplay)
    , m_config(q_configFromGLFormat(m_eglDisplay, format, true))
    , m_format(q_glFormatFromConfig(m_eglDisplay, m_config))
{
    EGLContext shareEGLContext = share ? static_cast<QWaylandGLContext *>(share)->eglContext() : EGL_NO_CONTEXT;

    eglBindAPI(EGL_OPENGL_ES_API);

    QVector<EGLint> eglContextAttrs;
    eglContextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
    eglContextAttrs.append(2);
    eglContextAttrs.append(EGL_NONE);

    m_context = eglCreateContext(m_eglDisplay, m_config, shareEGLContext, eglContextAttrs.constData());
}

QWaylandGLContext::~QWaylandGLContext()
{
    eglDestroyContext(m_eglDisplay, m_context);
}

bool QWaylandGLContext::makeCurrent(QPlatformSurface *surface)
{
    EGLSurface eglSurface = static_cast<QWaylandEglWindow *>(surface)->eglSurface();
    return eglMakeCurrent(m_eglDisplay, eglSurface, eglSurface, m_context);
}

void QWaylandGLContext::doneCurrent()
{
    eglMakeCurrent(m_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
}

void QWaylandGLContext::swapBuffers(QPlatformSurface *surface)
{
    EGLSurface eglSurface = static_cast<QWaylandEglWindow *>(surface)->eglSurface();
    eglSwapBuffers(m_eglDisplay, eglSurface);
}

void (*QWaylandGLContext::getProcAddress(const QByteArray &procName)) ()
{
    return eglGetProcAddress(procName.constData());
}

EGLConfig QWaylandGLContext::eglConfig() const
{
    return m_config;
}