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/****************************************************************************
**
** 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 <QtDebug>

#include "qwaylandreadbackglxwindow.h"
#include "qwaylandshmbackingstore.h"

QWaylandReadbackGlxWindow::QWaylandReadbackGlxWindow(QWindow *window, QWaylandReadbackGlxIntegration *glxIntegration)
    : QWaylandShmWindow(window)
    , m_glxIntegration(glxIntegration)
    , m_buffer(0)
    , m_pixmap(0)
    , m_config(0)
    , m_glxPixmap(0)
    , m_window(window)
{
}

QWaylandWindow::WindowType QWaylandReadbackGlxWindow::windowType() const
{
    //yeah. this type needs a new name
    return QWaylandWindow::Egl;
}

void QWaylandReadbackGlxWindow::setGeometry(const QRect &rect)
{
    QWaylandShmWindow::setGeometry(rect);

    if (m_pixmap) {
        delete mBuffer;
        //XFreePixmap deletes the glxPixmap as well
        XFreePixmap(m_glxIntegration->xDisplay(), m_pixmap);
        m_pixmap = 0;
    }
}

GLXPixmap QWaylandReadbackGlxWindow::glxPixmap() const
{
    if (!m_pixmap)
        const_cast<QWaylandReadbackGlxWindow *>(this)->createSurface();

    return m_glxPixmap;
}

uchar *QWaylandReadbackGlxWindow::buffer()
{
    return m_buffer->image()->bits();
}

void QWaylandReadbackGlxWindow::createSurface()
{
    QSize size(geometry().size());
    if (size.isEmpty()) {
        //QGLWidget wants a context for a window without geometry
        size = QSize(1,1);
    }

    waitForFrameSync();

    m_buffer = new QWaylandShmBuffer(m_glxIntegration->waylandDisplay(), size, QImage::Format_ARGB32);
    attach(m_buffer);

    int depth = XDefaultDepth(m_glxIntegration->xDisplay(), m_glxIntegration->screen());
    m_pixmap = XCreatePixmap(m_glxIntegration->xDisplay(), m_glxIntegration->rootWindow(), size.width(), size.height(), depth);
    XSync(m_glxIntegration->xDisplay(), False);

    if (!m_config)
        m_config = qglx_findConfig(m_glxIntegration->xDisplay(), m_glxIntegration->screen(), m_window->format());

    m_glxPixmap = glXCreatePixmap(m_glxIntegration->xDisplay(), m_config, m_pixmap,0);

    if (!m_glxPixmap)
        qDebug() << "Could not make glx surface out of pixmap :(";
}