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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QFBOPAINTDEVICE_H
#define QFBOPAINTDEVICE_H

#ifndef QT_NO_OPENGL

#include <QImage>
#include <QOpenGLFramebufferObject>
#include <QOpenGLPaintDevice>
#include <QSurface>

class QFboPaintDevice : public QOpenGLPaintDevice {
public:
    QFboPaintDevice(const QSize&, bool flipped = false, bool clearOnInit = true,
        QOpenGLFramebufferObject::Attachment = QOpenGLFramebufferObject::CombinedDepthStencil);
    ~QFboPaintDevice();

    // QOpenGLPaintDevice:
    void ensureActiveTarget() override;

    bool isValid() const { return m_framebufferObject->isValid(); }
    GLuint handle() const { return m_framebufferObject->handle(); }
    GLuint takeTexture();
    QImage toImage() const;

    bool bind() { return m_framebufferObject->bind(); }
    bool release() { return m_framebufferObject->release(); }
    QSize size() const { return m_framebufferObject->size(); }

    QOpenGLFramebufferObject* framebufferObject() { return m_framebufferObject; }
    const QOpenGLFramebufferObject* framebufferObject() const { return m_framebufferObject; }

    static bool isSupported() { return QOpenGLFramebufferObject::hasOpenGLFramebufferObjects(); }

private:
    QOpenGLFramebufferObject *m_framebufferObject;
    QSurface* m_surface;
};

#endif // QT_NO_OPENGL

#endif // QFBOPAINTDEVICE_H