/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
 *  Copyright (C) 2011-2017 - Daniel De Matteis
 *  Copyright (C) 2016-2017 - Brad Parker
 *
 *  RetroArch 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 Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  RetroArch 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 RetroArch.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include "../video_display_server.h"
#include "../common/x11_common.h"
#include "../../configuration.h"

typedef struct
{
   unsigned opacity;
   bool decorations;
} dispserv_x11_t;

static void* x11_display_server_init(void)
{
   dispserv_x11_t *dispserv = (dispserv_x11_t*)calloc(1, sizeof(*dispserv));

   if (!dispserv)
      return NULL;

   return dispserv;
}

static void x11_display_server_destroy(void *data)
{
   dispserv_x11_t *dispserv = (dispserv_x11_t*)data;

   if (dispserv)
      free(dispserv);
}

static bool x11_set_window_opacity(void *data, unsigned opacity)
{
   dispserv_x11_t *serv = (dispserv_x11_t*)data;
   Atom net_wm_opacity  = XInternAtom(g_x11_dpy, "_NET_WM_WINDOW_OPACITY", False);
   Atom cardinal        = XInternAtom(g_x11_dpy, "CARDINAL", False);

   serv->opacity        = opacity;

   opacity              = opacity * ((unsigned)-1 / 100.0);

   if (opacity == (unsigned)-1)
      XDeleteProperty(g_x11_dpy, g_x11_win, net_wm_opacity);
  else
      XChangeProperty(g_x11_dpy, g_x11_win, net_wm_opacity, cardinal, 32, PropModeReplace, (const unsigned char*)&opacity, 1);

   return true;
}

static bool x11_set_window_decorations(void *data, bool on)
{
   dispserv_x11_t *serv = (dispserv_x11_t*)data;

   serv->decorations = on;

   /* menu_setting performs a reinit instead to properly apply decoration changes */

   return true;
}

const video_display_server_t dispserv_x11 = {
   x11_display_server_init,
   x11_display_server_destroy,
   x11_set_window_opacity,
   NULL,
   x11_set_window_decorations,
   "x11"
};