/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2014 Martin Gräßlin <mgraesslin@kde.org>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#ifndef KWIN_WAYLAND_SERVER_SURFACE_INTERFACE_H
#define KWIN_WAYLAND_SERVER_SURFACE_INTERFACE_H

#include "output_interface.h"

#include <QObject>
#include <QRegion>

#include <wayland-server.h>

namespace KWin
{
namespace WaylandServer
{
class BufferInterface;
class CompositorInterface;

class SurfaceInterface : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QRegion damage READ damage NOTIFY damaged)
    Q_PROPERTY(QRegion opaque READ opaque NOTIFY opaqueChanged)
    Q_PROPERTY(QRegion input READ input NOTIFY inputChanged)
    Q_PROPERTY(qint32 scale READ scale NOTIFY scaleChanged)
    Q_PROPERTY(KWin::WaylandServer::OutputInterface::Transform transform READ transform NOTIFY transformChanged)
public:
    virtual ~SurfaceInterface();

    void create(wl_client *client, quint32 version, quint32 id);

    void frameRendered(quint32 msec);

    wl_resource *surface() const {
        return m_surface;
    }
    wl_client *client() const {
        return m_client;
    }

    QRegion damage() const {
        return m_current.damage;
    }
    QRegion opaque() const {
        return m_current.opaque;
    }
    QRegion input() const {
        return m_current.input;
    }
    qint32 scale() const {
        return m_current.scale;
    }
    OutputInterface::Transform transform() const {
        return m_current.transform;
    }
    BufferInterface *buffer() {
        return m_current.buffer;
    }
    QPoint offset() const {
        return m_current.offset;
    }

Q_SIGNALS:
    void damaged(const QRegion&);
    void opaqueChanged(const QRegion&);
    void inputChanged(const QRegion&);
    void scaleChanged(qint32);
    void transformChanged(KWin::WaylandServer::OutputInterface::Transform);

private:
    struct State {
        QRegion damage = QRegion();
        QRegion opaque = QRegion();
        QRegion input = QRegion();
        qint32 scale = 1;
        OutputInterface::Transform transform = OutputInterface::Transform::Normal;
        QList<wl_resource*> callbacks = QList<wl_resource*>();
        QPoint offset = QPoint();
        BufferInterface *buffer = nullptr;
    };
    friend class CompositorInterface;
    explicit SurfaceInterface(CompositorInterface *parent);
    static void unbind(wl_resource *r);
    static void destroyFrameCallback(wl_resource *r);

    static const struct wl_surface_interface s_interface;
    static void destroyCallback(wl_client *client, wl_resource *resource);
    static void attachCallback(wl_client *client, wl_resource *resource, wl_resource *buffer, int32_t sx, int32_t sy);
    static void damageCallback(wl_client *client, wl_resource *resource, int32_t x, int32_t y, int32_t width, int32_t height);
    static void frameCallaback(wl_client *client, wl_resource *resource, uint32_t callback);
    static void opaqueRegionCallback(wl_client *client, wl_resource *resource, wl_resource *region);
    static void inputRegionCallback(wl_client *client, wl_resource *resource, wl_resource *region);
    static void commitCallback(wl_client *client, wl_resource *resource);
    // since version 2
    static void bufferTransformCallback(wl_client *client, wl_resource *resource, int32_t transform);
    // since version 3
    static void bufferScaleCallback(wl_client *client, wl_resource *resource, int32_t scale);

    static SurfaceInterface *cast(wl_resource *r) {
        return reinterpret_cast<SurfaceInterface*>(wl_resource_get_user_data(r));
    }
    void destroy();
    void commit();
    void damage(const QRect &rect);
    void setScale(qint32 scale);
    void setTransform(OutputInterface::Transform transform);
    void addFrameCallback(uint32_t callback);
    void attachBuffer(wl_resource *buffer, const QPoint &offset);
    CompositorInterface *m_compositor;
    wl_resource *m_surface;
    wl_client *m_client;
    State m_current;
    State m_pending;
};

}
}

#endif