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

Copyright (C) 2013 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_SHM_POOL_H
#define KWIN_WAYLAND_SHM_POOL_H

#include <QObject>

class QImage;
class QSize;
class QTemporaryFile;

struct wl_shm;
struct wl_buffer;
struct wl_shm_pool;

namespace KWin
{
namespace Wayland
{
class Buffer;

class ShmPool : public QObject
{
    Q_OBJECT
public:
    explicit ShmPool(QObject *parent = nullptr);
    virtual ~ShmPool();
    bool isValid() const;
    void setup(wl_shm *shm);
    void release();
    void destroy();

    wl_buffer *createBuffer(const QImage &image);
    wl_buffer *createBuffer(const QSize &size, int32_t stride, const void *src);
    void *poolAddress() const;
    Buffer *getBuffer(const QSize &size, int32_t stride);
    wl_shm *shm();
Q_SIGNALS:
    void poolResized();
private:
    bool createPool();
    bool resizePool(int32_t newSize);
    wl_shm *m_shm;
    wl_shm_pool *m_pool;
    void *m_poolData;
    int32_t m_size;
    QScopedPointer<QTemporaryFile> m_tmpFile;
    bool m_valid;
    int m_offset;
    QList<Buffer*> m_buffers;
};

inline
bool ShmPool::isValid() const
{
    return m_valid;
}

inline
void* ShmPool::poolAddress() const
{
    return m_poolData;
}

inline
wl_shm *ShmPool::shm()
{
    return m_shm;
}

}
}

#endif