/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qwaylandeglclientbufferintegration.h"

#include "qwaylandeglwindow.h"
#include "qwaylandglcontext.h"

#include <wayland-client.h>

#include <QtCore/QDebug>

QT_BEGIN_NAMESPACE

static const char *qwaylandegl_threadedgl_blacklist_vendor[] = {
    "Mesa Project",
    0
};

QWaylandEglClientBufferIntegration::QWaylandEglClientBufferIntegration()
    : m_waylandDisplay(0)
    , m_supportsThreading(false)
{
    qDebug() << "Using Wayland-EGL";
}


QWaylandEglClientBufferIntegration::~QWaylandEglClientBufferIntegration()
{
    eglTerminate(m_eglDisplay);
}

void QWaylandEglClientBufferIntegration::initialize(QWaylandDisplay *display)
{
    QByteArray eglPlatform = qgetenv("EGL_PLATFORM");
    if (eglPlatform.isEmpty()) {
        setenv("EGL_PLATFORM","wayland",true);
    }

    m_waylandDisplay = display->wl_display();

    EGLint major,minor;
    m_eglDisplay = eglGetDisplay((EGLNativeDisplayType) m_waylandDisplay);
    if (m_eglDisplay == NULL) {
        qWarning("EGL not available");
    } else {
        if (!eglInitialize(m_eglDisplay, &major, &minor)) {
            qWarning("failed to initialize EGL display");
            return;
        }
    }

    m_supportsThreading = true;
    if (qEnvironmentVariableIsSet("QT_OPENGL_NO_SANITY_CHECK"))
        return;

    const char *vendor = eglQueryString(m_eglDisplay, EGL_VENDOR);
    for (int i = 0; qwaylandegl_threadedgl_blacklist_vendor[i]; ++i) {
        if (strstr(vendor, qwaylandegl_threadedgl_blacklist_vendor[i]) != 0) {
            m_supportsThreading = false;
            break;
        }
    }
}

bool QWaylandEglClientBufferIntegration::supportsThreadedOpenGL() const
{
    return m_supportsThreading;
}

QWaylandWindow *QWaylandEglClientBufferIntegration::createEglWindow(QWindow *window)
{
    return new QWaylandEglWindow(window);
}

QPlatformOpenGLContext *QWaylandEglClientBufferIntegration::createPlatformOpenGLContext(const QSurfaceFormat &glFormat, QPlatformOpenGLContext *share) const
{
    return new QWaylandGLContext(m_eglDisplay, glFormat, share);
}

EGLDisplay QWaylandEglClientBufferIntegration::eglDisplay() const
{
    return m_eglDisplay;
}

QT_END_NAMESPACE