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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Wayland module
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "compositor.h"
#include "window.h"

#include <QtWaylandCompositor/qwaylandoutput.h>
#include <QOpenGLFunctions>

QOpenGLTexture *View::getTexture() {
    if (advance())
        m_texture = currentBuffer().toOpenGLTexture();
    return m_texture;
}

bool View::isCursor() const
{
    return surface()->isCursorSurface();
}

Compositor::Compositor(Window *window)
    : QWaylandCompositor()
    , m_window(window)
{
}

Compositor::~Compositor()
{
}

void Compositor::create()
{
    QWaylandOutput *output = new QWaylandOutput(this, m_window);
    QWaylandOutputMode mode(QSize(800, 600), 60000);
    output->addMode(mode, true);
    QWaylandCompositor::create();
    output->setCurrentMode(mode);

    connect(this, &QWaylandCompositor::surfaceCreated, this, &Compositor::onSurfaceCreated);
}

void Compositor::onSurfaceCreated(QWaylandSurface *surface)
{
    connect(surface, &QWaylandSurface::surfaceDestroyed, this, &Compositor::onSurfaceDestroyed);
    connect(surface, &QWaylandSurface::redraw, this, &Compositor::triggerRender);
    View *view = new View;
    view->setSurface(surface);
    view->setOutput(outputFor(m_window));
    m_views << view;
    connect(view, &QWaylandView::surfaceDestroyed, this, &Compositor::viewSurfaceDestroyed);
}

void Compositor::onSurfaceDestroyed()
{
    triggerRender();
}

void Compositor::viewSurfaceDestroyed()
{
    View *view = qobject_cast<View*>(sender());
    m_views.removeAll(view);
    delete view;
}

void Compositor::triggerRender()
{
    m_window->requestUpdate();
}

void Compositor::startRender()
{
    QWaylandOutput *out = defaultOutput();
    if (out)
        out->frameStarted();
}

void Compositor::endRender()
{
    QWaylandOutput *out = defaultOutput();
    if (out)
        out->sendFrameCallbacks();
}