/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 Digia Plc and its Subsidiary(-ies) 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 "fboinsgrenderer.h"
#include "logorenderer.h"

#include <QtGui/QOpenGLFramebufferObject>

#include <QtQuick/QQuickWindow>
#include <qsgsimpletexturenode.h>




class TextureNode : public QObject, public QSGSimpleTextureNode
{
    Q_OBJECT

public:
    TextureNode(QQuickWindow *window)
        : m_fbo(0)
        , m_texture(0)
        , m_window(window)
        , m_logoRenderer(0)
    {
        connect(m_window, SIGNAL(beforeRendering()), this, SLOT(renderFBO()));
    }

    ~TextureNode()
    {
        delete m_texture;
        delete m_fbo;
        delete m_logoRenderer;
    }

public slots:
    void renderFBO()
    {
        QSize size = rect().size().toSize();

        if (!m_fbo) {

            QOpenGLFramebufferObjectFormat format;
            format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
            m_fbo = new QOpenGLFramebufferObject(size, format);
            m_texture = m_window->createTextureFromId(m_fbo->texture(), size);
            m_logoRenderer = new LogoRenderer();
            m_logoRenderer->initialize();
            setTexture(m_texture);
        }

        m_fbo->bind();

        glViewport(0, 0, size.width(), size.height());

        m_logoRenderer->render();

        m_fbo->bindDefault();

        m_window->update();
    }

private:
    QOpenGLFramebufferObject *m_fbo;
    QSGTexture *m_texture;
    QQuickWindow *m_window;

    LogoRenderer *m_logoRenderer;
};



FboInSGRenderer::FboInSGRenderer()
{
    setFlag(ItemHasContents, true);
}


QSGNode *FboInSGRenderer::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
{
    // Don't bother with resize and such, just recreate the node from scratch
    // when geometry changes.
    if (oldNode)
        delete oldNode;

    TextureNode *node = new TextureNode(window());
    node->setRect(boundingRect());

    return node;
}

#include "fboinsgrenderer.moc"