/*

 * GStreamer

 * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>

 * Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#define GLIB_DISABLE_DEPRECATION_WARNINGS

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <gst/gst.h>

#include <locale.h>

#include "gstglwindow_x11.h"

#include "gstgldisplay_x11.h"

#include "../gstglwindow_private.h"

/* for XkbKeycodeToKeysym */

#include <X11/XKBlib.h>

#define GST_GL_WINDOW_X11_GET_PRIVATE(o)  \

  (G_TYPE_INSTANCE_GET_PRIVATE((o), GST_TYPE_GL_WINDOW_X11, GstGLWindowX11Private))

#define GST_CAT_DEFAULT gst_gl_window_debug

#define gst_gl_window_x11_parent_class parent_class

G_DEFINE_TYPE (GstGLWindowX11, gst_gl_window_x11, GST_TYPE_GL_WINDOW);

G_GNUC_INTERNAL

    gboolean gst_gl_window_x11_handle_event (GstGLWindowX11 * window_x11,

    xcb_generic_event_t * event);

/* X error trap */

static int TrappedErrorCode = 0;

static int (*old_error_handler) (Display *, XErrorEvent *);

enum

{

  ARG_0,

  ARG_DISPLAY

};

struct _GstGLWindowX11Private

{

  gboolean activate;

  gboolean activate_result;

  gint preferred_width;

  gint preferred_height;

  gboolean handle_events;

  GstVideoRectangle render_rect;

};

static guintptr gst_gl_window_x11_get_display (GstGLWindow * window);

guintptr gst_gl_window_x11_get_gl_context (GstGLWindow * window);

gboolean gst_gl_window_x11_activate (GstGLWindow * window, gboolean activate);

static void gst_gl_window_x11_set_window_handle (GstGLWindow * window,

    guintptr handle);

static gboolean gst_gl_window_x11_set_render_rectangle (GstGLWindow * window,

    int x, int y, int width, int height);

static guintptr gst_gl_window_x11_get_window_handle (GstGLWindow * window);

static void gst_gl_window_x11_set_preferred_size (GstGLWindow * window,

    gint width, gint height);

static void gst_gl_window_x11_show (GstGLWindow * window);

static void gst_gl_window_x11_draw (GstGLWindow * window);

gboolean gst_gl_window_x11_create_context (GstGLWindow * window,

    GstGLAPI gl_api, guintptr external_gl_context, GError ** error);

static gboolean gst_gl_window_x11_open (GstGLWindow * window, GError ** error);

static void gst_gl_window_x11_close (GstGLWindow * window);

static void gst_gl_window_x11_handle_events (GstGLWindow * window,

    gboolean handle_events);

static void

gst_gl_window_x11_finalize (GObject * object)

{

  G_OBJECT_CLASS (parent_class)->finalize (object);

}

static void

gst_gl_window_x11_class_init (GstGLWindowX11Class * klass)

{

  GObjectClass *obj_class = G_OBJECT_CLASS (klass);

  GstGLWindowClass *window_class = (GstGLWindowClass *) klass;

  g_type_class_add_private (klass, sizeof (GstGLWindowX11Private));

  obj_class->finalize = gst_gl_window_x11_finalize;

  window_class->get_display = GST_DEBUG_FUNCPTR (gst_gl_window_x11_get_display);

  window_class->set_window_handle =

      GST_DEBUG_FUNCPTR (gst_gl_window_x11_set_window_handle);

  window_class->set_render_rectangle =

      GST_DEBUG_FUNCPTR (gst_gl_window_x11_set_render_rectangle);

  window_class->get_window_handle =

      GST_DEBUG_FUNCPTR (gst_gl_window_x11_get_window_handle);

  window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_x11_draw);

  window_class->open = GST_DEBUG_FUNCPTR (gst_gl_window_x11_open);

  window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_x11_close);

  window_class->handle_events =

      GST_DEBUG_FUNCPTR (gst_gl_window_x11_handle_events);

  window_class->set_preferred_size =

      GST_DEBUG_FUNCPTR (gst_gl_window_x11_set_preferred_size);

  window_class->show = GST_DEBUG_FUNCPTR (gst_gl_window_x11_show);

}

static void

gst_gl_window_x11_init (GstGLWindowX11 * window)

{

  window->priv = GST_GL_WINDOW_X11_GET_PRIVATE (window);

}

/* Must be called in the gl thread */

GstGLWindowX11 *

gst_gl_window_x11_new (GstGLDisplay * display)

{

  GstGLWindowX11 *window;

  if ((gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_X11)

      == GST_GL_DISPLAY_TYPE_NONE) {

    GST_INFO ("Wrong display type %u for this window type %u", display->type,

        GST_GL_DISPLAY_TYPE_X11);

    return NULL;

  }

  window = g_object_new (GST_TYPE_GL_WINDOW_X11, NULL);

  gst_object_ref_sink (window);

  return window;

}

static gboolean

gst_gl_window_x11_open (GstGLWindow * window, GError ** error)

{

  GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);

  GstGLDisplayX11 *display_x11 = (GstGLDisplayX11 *) window->display;

  window_x11->device = display_x11->display;

//  window_x11->device = XOpenDisplay (display_x11->name);

  if (window_x11->device == NULL) {

    g_set_error (error, GST_GL_WINDOW_ERROR,

        GST_GL_WINDOW_ERROR_RESOURCE_UNAVAILABLE,

        "Failed to connect to X display server");

    goto failure;

  }

  GST_LOG ("gl device id: %ld", (gulong) window_x11->device);

  window_x11->screen = DefaultScreenOfDisplay (window_x11->device);

  window_x11->screen_num = DefaultScreen (window_x11->device);

  window_x11->visual =

      DefaultVisual (window_x11->device, window_x11->screen_num);

  window_x11->root = DefaultRootWindow (window_x11->device);

  window_x11->white = XWhitePixel (window_x11->device, window_x11->screen_num);

  window_x11->black = XBlackPixel (window_x11->device, window_x11->screen_num);

  window_x11->depth = DefaultDepthOfScreen (window_x11->screen);

  GST_LOG ("gl root id: %lud", (gulong) window_x11->root);

  window_x11->device_width =

      DisplayWidth (window_x11->device, window_x11->screen_num);

  window_x11->device_height =

      DisplayHeight (window_x11->device, window_x11->screen_num);

  window_x11->allow_extra_expose_events = TRUE;

  return GST_GL_WINDOW_CLASS (parent_class)->open (window, error);

failure:

  return FALSE;

}

gboolean

gst_gl_window_x11_create_window (GstGLWindowX11 * window_x11)

{

  XSetWindowAttributes win_attr;

  XTextProperty text_property;

  XWMHints wm_hints;

  unsigned long mask;

  const gchar *title = "OpenGL renderer";

  Atom wm_atoms[1];

  gint x = 0, y = 0, width = 1, height = 1;

  if (window_x11->visual_info->visual != window_x11->visual)

    GST_LOG ("selected visual is different from the default");

  GST_LOG ("visual XID:%d, screen:%d, visualid:%d, depth:%d, class:%d, "

      "red_mask:%ld, green_mask:%ld, blue_mask:%ld bpp:%d",

      (gint) XVisualIDFromVisual (window_x11->visual_info->visual),

      window_x11->visual_info->screen, (gint) window_x11->visual_info->visualid,

      window_x11->visual_info->depth, window_x11->visual_info->class,

      window_x11->visual_info->red_mask, window_x11->visual_info->green_mask,

      window_x11->visual_info->blue_mask,

      window_x11->visual_info->bits_per_rgb);

  win_attr.event_mask =

      StructureNotifyMask | ExposureMask | VisibilityChangeMask;

  win_attr.do_not_propagate_mask = NoEventMask;

  win_attr.background_pixmap = None;

  win_attr.background_pixel = 0;

  win_attr.border_pixel = 0;

  win_attr.colormap =

      XCreateColormap (window_x11->device, window_x11->root,

      window_x11->visual_info->visual, AllocNone);

  mask = CWBackPixmap | CWBorderPixel | CWColormap | CWEventMask;

  window_x11->internal_win_id =

      XCreateWindow (window_x11->device,

      window_x11->parent_win ? window_x11->parent_win : window_x11->root,

      x, y, width, height, 0,

      window_x11->visual_info->depth, InputOutput,

      window_x11->visual_info->visual, mask, &win_attr);

  gst_gl_window_x11_handle_events (GST_GL_WINDOW (window_x11),

      window_x11->priv->handle_events);

  XSync (window_x11->device, FALSE);

  XSetWindowBackgroundPixmap (window_x11->device,

      window_x11->internal_win_id, None);

  GST_LOG ("gl window id: %lud", (gulong) window_x11->internal_win_id);

  GST_LOG ("gl window props: x:%d y:%d", x, y);

  wm_atoms[0] = XInternAtom (window_x11->device, "WM_DELETE_WINDOW", True);

  if (wm_atoms[0] == None)

    GST_DEBUG ("Cannot create WM_DELETE_WINDOW");

  XSetWMProtocols (window_x11->device, window_x11->internal_win_id,

      wm_atoms, 1);

  wm_hints.flags = StateHint;

  wm_hints.initial_state = NormalState;

  wm_hints.input = False;

  XStringListToTextProperty ((char **) &title, 1, &text_property);

  XSetWMProperties (window_x11->device, window_x11->internal_win_id,

      &text_property, &text_property, 0, 0, NULL, &wm_hints, NULL);

  XFree (text_property.value);

  return TRUE;

}

static void

gst_gl_window_x11_close (GstGLWindow * window)

{

  GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);

  if (window_x11->device) {

    if (window_x11->internal_win_id) {

      XUnmapWindow (window_x11->device, window_x11->internal_win_id);

      XDestroyWindow (window_x11->device, window_x11->internal_win_id);

    }

    XFree (window_x11->visual_info);

    GST_DEBUG ("display receiver closed");

  }

  window_x11->running = FALSE;

  GST_GL_WINDOW_CLASS (parent_class)->close (window);

}

/* called by the gl thread */

static void

gst_gl_window_x11_set_window_handle (GstGLWindow * window, guintptr id)

{

  GstGLWindowX11 *window_x11;

  gint x, y, width, height;

  window_x11 = GST_GL_WINDOW_X11 (window);

  window_x11->parent_win = (Window) id;

  if (window_x11->priv->render_rect.w > 0 &&

      window_x11->priv->render_rect.h > 0) {

    x = window_x11->priv->render_rect.x;

    y = window_x11->priv->render_rect.y;

    width = window_x11->priv->render_rect.w;

    height = window_x11->priv->render_rect.h;

  } else {

    x = y = 0;

    if (window_x11->parent_win) {

      XWindowAttributes attr;

      XGetWindowAttributes (window_x11->device, window_x11->parent_win, &attr);

      width = attr.width;

      height = attr.height;

    } else {

      width = window_x11->priv->preferred_width;

      height = window_x11->priv->preferred_height;

    }

  }

  XResizeWindow (window_x11->device, window_x11->internal_win_id,

      width, height);

  XReparentWindow (window_x11->device, window_x11->internal_win_id,

      window_x11->parent_win, x, y);

  XSync (window_x11->device, FALSE);

}

struct SetRenderRectangle

{

  GstGLWindowX11 *window_x11;

  GstVideoRectangle rect;

};

static void

_free_set_render_rectangle (struct SetRenderRectangle *render)

{

  if (render) {

    if (render->window_x11)

      gst_object_unref (render->window_x11);

    g_free (render);

  }

}

static void

_set_render_rectangle (gpointer data)

{

  struct SetRenderRectangle *render = data;

  GST_LOG_OBJECT (render->window_x11, "setting render rectangle %i,%i+%ix%i",

      render->rect.x, render->rect.y, render->rect.w, render->rect.h);

  if (render->window_x11->internal_win_id)

    XMoveResizeWindow (render->window_x11->device,

        render->window_x11->internal_win_id, render->rect.x, render->rect.y,

        render->rect.w, render->rect.h);

  if (render->window_x11->device)

    XSync (render->window_x11->device, FALSE);

  render->window_x11->priv->render_rect = render->rect;

}

static gboolean

gst_gl_window_x11_set_render_rectangle (GstGLWindow * window,

    int x, int y, int width, int height)

{

  GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);

  struct SetRenderRectangle *render;

  render = g_new0 (struct SetRenderRectangle, 1);

  render->window_x11 = gst_object_ref (window_x11);

  render->rect.x = x;

  render->rect.y = y;

  render->rect.w = width;

  render->rect.h = height;

  gst_gl_window_send_message_async (window,

      (GstGLWindowCB) _set_render_rectangle, render,

      (GDestroyNotify) _free_set_render_rectangle);

  return TRUE;

}

static guintptr

gst_gl_window_x11_get_window_handle (GstGLWindow * window)

{

  GstGLWindowX11 *window_x11;

  window_x11 = GST_GL_WINDOW_X11 (window);

  return window_x11->internal_win_id;

}

static void

gst_gl_window_x11_set_preferred_size (GstGLWindow * window, gint width,

    gint height)

{

  GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);

  window_x11->priv->preferred_width = width;

  window_x11->priv->preferred_height = height;

}

static void

_show_window (GstGLWindow * window)

{

  GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);

  guint width = window_x11->priv->preferred_width;

  guint height = window_x11->priv->preferred_height;

  if (!window_x11->visible) {

    if (!window_x11->parent_win) {

      XResizeWindow (window_x11->device, window_x11->internal_win_id,

          width, height);

    }

    XMapWindow (window_x11->device, window_x11->internal_win_id);

    XSync (window_x11->device, FALSE);

    window_x11->visible = TRUE;

  }

}

static void

gst_gl_window_x11_show (GstGLWindow * window)

{

  gst_gl_window_send_message (window, (GstGLWindowCB) _show_window, window);

}

static void

_context_draw (GstGLContext * context, GstGLWindow * window)

{

  window->draw (window->draw_data);

  gst_gl_context_swap_buffers (context);

  gst_object_unref (context);

}

static void

draw_cb (gpointer data)

{

  GstGLWindowX11 *window_x11 = data;

  GstGLWindow *window = GST_GL_WINDOW (window_x11);

  guint width, height;

  XWindowAttributes attr;

  if (window_x11->internal_win_id) {

    gboolean need_resize = FALSE;

    XGetWindowAttributes (window_x11->device, window_x11->internal_win_id,

        &attr);

    GST_TRACE_OBJECT (window, "window size %ux%u", attr.width, attr.height);

    if (window_x11->parent_win &&

        (window_x11->priv->render_rect.w < 0 ||

            window_x11->priv->render_rect.h < 0)) {

      XWindowAttributes attr_parent;

      XGetWindowAttributes (window_x11->device, window_x11->parent_win,

          &attr_parent);

      GST_TRACE_OBJECT (window, "parent window size %ux%u", attr_parent.width,

          attr_parent.height);

      if (attr.width != attr_parent.width || attr.height != attr_parent.height) {

        XMoveResizeWindow (window_x11->device, window_x11->internal_win_id,

            0, 0, attr_parent.width, attr_parent.height);

        XSync (window_x11->device, FALSE);

        attr.width = attr_parent.width;

        attr.height = attr_parent.height;

        GST_LOG ("parent resize:  %d, %d",

            attr_parent.width, attr_parent.height);

        need_resize = TRUE;

      }

    }

    gst_gl_window_get_surface_dimensions (window, &width, &height);

    if (attr.width != width || attr.height != height)

      need_resize = TRUE;

    if (need_resize)

      gst_gl_window_queue_resize (window);

    if (window_x11->allow_extra_expose_events) {

      if (window->queue_resize)

        gst_gl_window_resize (window, width, height);

      if (window->draw) {

        GstGLContext *context = gst_gl_window_get_context (window);

        _context_draw (context, window);

      }

    }

  }

}

/* Not called by the gl thread */

static void

gst_gl_window_x11_draw (GstGLWindow * window)

{

  gst_gl_window_send_message (window, (GstGLWindowCB) draw_cb, window);

}

static void

gst_gl_window_x11_handle_events (GstGLWindow * window, gboolean handle_events)

{

  GstGLWindowX11 *window_x11;

  g_return_if_fail (window != NULL);

  window_x11 = GST_GL_WINDOW_X11 (window);

  window_x11->priv->handle_events = handle_events;

  if (window_x11->internal_win_id) {

    if (handle_events) {

      XSelectInput (window_x11->device, window_x11->internal_win_id,

          StructureNotifyMask | ExposureMask | VisibilityChangeMask |

          PointerMotionMask | KeyPressMask | KeyReleaseMask | ButtonPressMask |

          ButtonReleaseMask);

    } else {

      XSelectInput (window_x11->device, window_x11->internal_win_id,

          StructureNotifyMask | ExposureMask | VisibilityChangeMask);

    }

  }

}

gboolean

gst_gl_window_x11_handle_event (GstGLWindowX11 * window_x11,

    xcb_generic_event_t * event)

{

  GstGLWindow *window = GST_GL_WINDOW (window_x11);

  GstGLDisplayX11 *display_x11 = GST_GL_DISPLAY_X11 (window->display);

  xcb_connection_t *connection = display_x11->xcb_connection;

  uint8_t event_code = event->response_type & 0x7f;

  switch (event_code) {

    case XCB_CLIENT_MESSAGE:{

      xcb_client_message_event_t *client_event;

      xcb_intern_atom_cookie_t cookie;

      xcb_intern_atom_reply_t *reply;

      client_event = (xcb_client_message_event_t *) event;

      cookie = xcb_intern_atom (connection, 0, 16, "WM_DELETE_WINDOW");

      reply = xcb_intern_atom_reply (connection, cookie, 0);

      if (client_event->data.data32[0] == reply->atom) {

        GST_INFO_OBJECT (window_x11, "Close requested");

        if (window->close)

          window->close (window->close_data);

        gst_gl_display_remove_window (GST_GL_DISPLAY (display_x11),

            GST_GL_WINDOW (window_x11));

      }

      g_free (reply);

      break;

    }

    case XCB_CONFIGURE_NOTIFY:{

      xcb_configure_notify_event_t *configure_event;

      configure_event = (xcb_configure_notify_event_t *) event;

      gst_gl_window_resize (window, configure_event->width,

          configure_event->height);

      gst_gl_window_draw (window);

      break;

    }

    case XCB_EXPOSE:{

      xcb_expose_event_t *expose_event = (xcb_expose_event_t *) event;

      /* non-zero means that other Expose follows

       * so just wait for the last one

       * in theory we should not receive non-zero because

       * we have no sub areas here but just in case */

      if (expose_event->count != 0)

        break;

      gst_gl_window_draw (window);

      break;

    }

    case XCB_KEY_PRESS:

    case XCB_KEY_RELEASE:{

      xcb_key_press_event_t *kp = (xcb_key_press_event_t *) event;

      const gchar *event_type_str;

      gchar *key_str;

      KeySym keysym;

      keysym = XkbKeycodeToKeysym (window_x11->device, kp->detail, 0, 0);

      key_str = XKeysymToString (keysym);

      if (event_code == XCB_KEY_PRESS)

        event_type_str = "key-press";

      else

        event_type_str = "key-release";

      gst_gl_window_send_key_event (window, event_type_str, key_str);

      break;

    }

    case XCB_BUTTON_PRESS:

    case XCB_BUTTON_RELEASE:{

      xcb_button_press_event_t *bp = (xcb_button_press_event_t *) event;

      const gchar *event_type_str;

      if (event_code == XCB_BUTTON_PRESS)

        event_type_str = "mouse-button-press";

      else

        event_type_str = "mouse-button-release";

      gst_gl_window_send_mouse_event (window, event_type_str, bp->detail,

          (double) bp->event_x, (double) bp->event_y);

      break;

    }

    case XCB_MOTION_NOTIFY:{

      xcb_motion_notify_event_t *motion = (xcb_motion_notify_event_t *) event;

      gst_gl_window_send_mouse_event (window, "mouse-move", 0,

          (double) motion->event_x, (double) motion->event_y);

      break;

    }

    default:

      GST_TRACE ("unhandled XCB event: %u", event_code);

      break;

  }

  return TRUE;

}

static int

error_handler (Display * xdpy, XErrorEvent * error)

{

  TrappedErrorCode = error->error_code;

  return 0;

}

/**

 * gst_gl_window_x11_trap_x_errors:

 *

 * Traps every X error until gst_gl_window_x11_untrap_x_errors() is called.

 */

void

gst_gl_window_x11_trap_x_errors (void)

{

  TrappedErrorCode = 0;

  old_error_handler = XSetErrorHandler (error_handler);

}

/**

 * gst_gl_window_x11_untrap_x_errors:

 *

 * Removes the X error trap and returns the current status.

 *

 * Return value: the trapped error code, or 0 for success

 */

gint

gst_gl_window_x11_untrap_x_errors (void)

{

  XSetErrorHandler (old_error_handler);

  return TrappedErrorCode;

}

static guintptr

gst_gl_window_x11_get_display (GstGLWindow * window)

{

  GstGLWindowX11 *window_x11 = GST_GL_WINDOW_X11 (window);

  return (guintptr) window_x11->device;

}