vlc_vout_window.h

/*****************************************************************************
 * vlc_vout_window.h: vout_window_t definitions
 *****************************************************************************
 * Copyright (C) 2008 Rémi Denis-Courmont
 * Copyright (C) 2009 Laurent Aimar
 * $Id$
 *
 * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef VLC_VOUT_WINDOW_H
#define VLC_VOUT_WINDOW_H 1

#include <stdarg.h>
#include <vlc_common.h>

/**
 * \defgroup video_window Video window
 * \ingroup video_output
 * Video output window management
 * @{
 * \file
 * Video output window modules interface
 */

typedef struct vout_window_t vout_window_t;
typedef struct vout_window_sys_t vout_window_sys_t;

struct wl_display;
struct wl_surface;

/**
 * Window handle type
 */
enum {
    VOUT_WINDOW_TYPE_INVALID=0,
    VOUT_WINDOW_TYPE_XID,
    VOUT_WINDOW_TYPE_HWND,
    VOUT_WINDOW_TYPE_NSOBJECT,
    VOUT_WINDOW_TYPE_ANDROID_NATIVE,
    VOUT_WINDOW_TYPE_WAYLAND,
};

/**
 * Control query for vout_window_t
 */
enum {
    VOUT_WINDOW_SET_STATE, /* unsigned state */
    VOUT_WINDOW_SET_SIZE,   /* unsigned i_width, unsigned i_height */
    VOUT_WINDOW_SET_FULLSCREEN, /* int b_fullscreen */
};

typedef struct vout_window_cfg_t {
    /* Window handle type */
    unsigned type;

    /* If true, a standalone window is requested */
    bool is_standalone;
    bool is_fullscreen;

#ifdef __APPLE__
    /* Window position hint */
    int x;
    int y;
#endif

    /* Windows size hint */
    unsigned width;
    unsigned height;

} vout_window_cfg_t;

typedef struct vout_window_owner {
    void *sys;
    void (*resized)(vout_window_t *, unsigned width, unsigned height);
    void (*closed)(vout_window_t *);
} vout_window_owner_t;

/**
 * FIXME do we need an event system in the window too ?
 * or the window user will take care of it ?
 */
struct vout_window_t {
    VLC_COMMON_MEMBERS

    unsigned type; /**< Window handle type */

    /* window handle (mandatory)
     *
     * It must be filled in the open function.
     */
    union {
        void     *hwnd;          /* Win32 window handle */
        uint32_t xid;            /* X11 windows ID */
        void     *nsobject;      /* Mac OSX view object */
        void     *anativewindow; /* Android native window. */
        struct wl_surface *wl;   /* Wayland surface */
    } handle;

    /* display server (mandatory) */
    union {
        char     *x11; /* X11 display (NULL = use default) */
        struct wl_display *wl;   /* Wayland struct wl_display pointer */
    } display;

    /* Control on the module (mandatory)
     *
     * Do not use it directly; use vout_window_Control instead.
     */
    int (*control)(vout_window_t *, int query, va_list);

    /* Private place holder for the vout_window_t module (optional)
     *
     * A module is free to use it as it wishes.
     */
    vout_window_sys_t *sys;

    vout_window_owner_t owner;
};

/**
 * Creates a new window.
 *
 * @param module plugin name (usually "$window")
 * @note If you are inside a "vout display", you must use
 / vout_display_NewWindow() and vout_display_DeleteWindow() instead.
 * This enables recycling windows.
 */
VLC_API vout_window_t * vout_window_New(vlc_object_t *, const char *module, const vout_window_cfg_t *, const vout_window_owner_t *);

/**
 * Deletes a window created by vout_window_New().
 *
 * @note See vout_window_New() about window recycling.
 */
VLC_API void vout_window_Delete(vout_window_t *);

static inline int vout_window_vaControl(vout_window_t *window, int query,
                                        va_list ap)
{
    return window->control(window, query, ap);
}

/**
 * Reconfigures a window.
 *
 * @note The vout_window_* wrappers should be used instead of this function.
 *
 * @warning The caller must own the window, as vout_window_t is not thread safe.
 */
static inline int vout_window_Control(vout_window_t *window, int query, ...)
{
    va_list ap;
    int ret;

    va_start(ap, query);
    ret = vout_window_vaControl(window, query, ap);
    va_end(ap);
    return ret;
}

/**
 * Configures the window manager state for this window.
 */
static inline int vout_window_SetState(vout_window_t *window, unsigned state)
{
    return vout_window_Control(window, VOUT_WINDOW_SET_STATE, state);
}

/**
 * Configures the window display (i.e. inner/useful) size.
 */
static inline int vout_window_SetSize(vout_window_t *window,
                                      unsigned width, unsigned height)
{
    return vout_window_Control(window, VOUT_WINDOW_SET_SIZE, width, height);
}

/**
 * Sets fullscreen mode.
 */
static inline int vout_window_SetFullScreen(vout_window_t *window, bool full)
{
    return vout_window_Control(window, VOUT_WINDOW_SET_FULLSCREEN, full);
}

static inline void vout_window_ReportSize(vout_window_t *window,
                                          unsigned width, unsigned height)
{
    if (window->owner.resized != NULL)
        window->owner.resized(window, width, height);
}

static inline void vout_window_ReportClose(vout_window_t *window)
{
    if (window->owner.closed != NULL)
        window->owner.closed(window);
}

/** @} */
#endif /* VLC_VOUT_WINDOW_H */