src/lib/ecore_x/xcb/ecore_xcb_xinerama.c

   1 #include "ecore_xcb_private.h"
   2
   3 /**
   4  * @defgroup Ecore_X_Xinerama_Group X Xinerama Extension Functions
   5  *
   6  * Functions related to the X Xinerama extension.
   7  */
   8
   9 #ifdef ECORE_XCB_XINERAMA
  10 static int _xinerama_available = 0;
  11 static xcb_xinerama_query_version_cookie_t _ecore_xcb_xinerama_init_cookie;
  12 #endif /* ECORE_XCB_XINERAMA */
  13
  14 /* To avoid round trips, the initialization is separated in 2
  15    functions: _ecore_xcb_xinerama_init and
  16    _ecore_xcb_xinerama_init_finalize. The first one gets the cookies and
  17    the second one gets the replies. */
  18
  19 void
  20 _ecore_x_xinerama_init(const xcb_query_extension_reply_t *reply)
  21 {
  22 #ifdef ECORE_XCB_XINERAMA
  23    if (reply && (reply->present))
  24       _ecore_xcb_xinerama_init_cookie = xcb_xinerama_query_version_unchecked(_ecore_xcb_conn, 1, 2);
  25
  26 #endif /* ECORE_XCB_XINERAMA */
  27 } /* _ecore_x_xinerama_init */
  28
  29 void
  30 _ecore_x_xinerama_init_finalize(void)
  31 {
  32 #ifdef ECORE_XCB_XINERAMA
  33    xcb_xinerama_query_version_reply_t *reply;
  34
  35    reply = xcb_xinerama_query_version_reply(_ecore_xcb_conn,
  36                                             _ecore_xcb_xinerama_init_cookie, NULL);
  37
  38    if (reply)
  39      {
  40         if ((reply->major >= 1) &&
  41             (reply->minor >= 1))
  42            _xinerama_available = 1;
  43
  44         free(reply);
  45      }
  46
  47 #endif /* ECORE_XCB_XINERAMA */
  48 } /* _ecore_x_xinerama_init_finalize */
  49
  50 /**
  51  * Return whether the X server supports the Xinerama Extension.
  52  * @return 1 if the X Xinerama Extension is available, 0 otherwise.
  53  *
  54  * Return 1 if the X server supports the Fixes Xinerama version 1.1,
  55  * 0 otherwise.
  56  * @ingroup Ecore_X_Xinerama_Group
  57  */
  58 EAPI Eina_Bool
  59 ecore_x_xinerama_query(void)
  60 {
  61 #ifdef ECORE_XCB_XINERAMA
  62    return _xinerama_available;
  63 #else /* ifdef ECORE_XCB_XINERAMA */
  64    return 0;
  65 #endif /* ECORE_XCB_XINERAMA */
  66 } /* ecore_x_xinerama_query */
  67
  68 /**
  69  * Sends the XineramaQueryScreens request.
  70  * @ingroup Ecore_X_Xinerama_Group
  71  */
  72 EAPI void
  73 ecore_x_xinerama_query_screens_prefetch(void)
  74 {
  75 #ifdef ECORE_XCB_XINERAMA
  76    xcb_xinerama_query_screens_cookie_t cookie;
  77
  78    cookie = xcb_xinerama_query_screens_unchecked(_ecore_xcb_conn);
  79    _ecore_xcb_cookie_cache(cookie.sequence);
  80 #endif /* ECORE_XCB_XINERAMA */
  81 } /* ecore_x_xinerama_query_screens_prefetch */
  82
  83 /**
  84  * Gets the reply of the XineramaQueryScreens request sent by ecore_x_xinerama_query_screens_prefetch().
  85  * @ingroup Ecore_X_Xinerama_Group
  86  */
  87 EAPI void
  88 ecore_x_xinerama_query_screens_fetch(void)
  89 {
  90 #ifdef ECORE_XCB_XINERAMA
  91    xcb_xinerama_query_screens_cookie_t cookie;
  92    xcb_xinerama_query_screens_reply_t *reply;
  93
  94    cookie.sequence = _ecore_xcb_cookie_get();
  95    reply = xcb_xinerama_query_screens_reply(_ecore_xcb_conn, cookie, NULL);
  96    _ecore_xcb_reply_cache(reply);
  97 #endif /* ECORE_XCB_XINERAMA */
  98 } /* ecore_x_xinerama_query_screens_fetch */
  99
 100 /**
 101  * Return the number of screens.
 102  * @return The screen count.
 103  *
 104  * Return the number of screens.
 105  *
 106  * To use this function, you must call before, and in order,
 107  * ecore_x_xinerama_query_screens_prefetch(), which sends the XineramaQueryScreens request,
 108  * then ecore_x_xinerama_query_screens_fetch(), which gets the reply.
 109  * @ingroup Ecore_X_Xinerama_Group
 110  */
 111 EAPI int
 112 ecore_x_xinerama_screen_count_get(void)
 113 {
 114    int screen_count = 0;
 115 #ifdef ECORE_XCB_XINERAMA
 116    xcb_xinerama_screen_info_iterator_t iter;
 117    xcb_xinerama_query_screens_reply_t *reply;
 118
 119    reply = _ecore_xcb_reply_get();
 120    if (!reply)
 121       return 0;
 122
 123    iter = xcb_xinerama_query_screens_screen_info_iterator(reply);
 124    screen_count = iter.rem;
 125 #endif /* ECORE_XCB_XINERAMA */
 126
 127    return screen_count;
 128 } /* ecore_x_xinerama_screen_count_get */
 129
 130 /**
 131  * Get the geometry of the screen.
 132  * @param screen The screen (Unused).
 133  * @param x      The X coordinate of the screen.
 134  * @param y      The Y coordinate of the screen
 135  * @param width  The width of the screen
 136  * @param height The height of the screen
 137  * @return       1 on success, 0 otherwise.
 138  *
 139  * Get the geometry of the screen whose number is @p screen. The
 140  * returned values are stored in @p x, @p y, @p width and @p height.
 141  *
 142  * To use this function, you must call before, and in order,
 143  * ecore_x_xinerama_query_screens_prefetch(), which sends the XineramaQueryScreens request,
 144  * then ecore_x_xinerama_query_screens_fetch(), which gets the reply.
 145  * @ingroup Ecore_X_Xinerama_Group
 146  */
 147 EAPI Eina_Bool
 148 ecore_x_xinerama_screen_geometry_get(int  screen,
 149                                      int *x,
 150                                      int *y,
 151                                      int *width,
 152                                      int *height)
 153 {
 154 #ifdef ECORE_XCB_XINERAMA
 155    xcb_xinerama_screen_info_iterator_t iter;
 156    xcb_xinerama_query_screens_reply_t *reply;
 157
 158    reply = _ecore_xcb_reply_get();
 159    if (!reply)
 160      {
 161         if (x)
 162            *x = 0;
 163
 164         if (y)
 165            *y = 0;
 166
 167         if (width)
 168            *width = ((xcb_screen_t *)_ecore_xcb_screen)->width_in_pixels;
 169
 170         if (height)
 171            *height = ((xcb_screen_t *)_ecore_xcb_screen)->height_in_pixels;
 172
 173         return 0;
 174      }
 175
 176    iter = xcb_xinerama_query_screens_screen_info_iterator(reply);
 177    for (; iter.rem; screen--, xcb_xinerama_screen_info_next(&iter))
 178      {
 179         if (screen == 0)
 180           {
 181              if (x)
 182                 *x = iter.data->x_org;
 183
 184              if (y)
 185                 *y = iter.data->y_org;
 186
 187              if (width)
 188                 *width = iter.data->width;
 189
 190              if (height)
 191                 *height = iter.data->height;
 192
 193              return 1;
 194           }
 195      }
 196 #endif /* ECORE_XCB_XINERAMA */
 197
 198    if (x)
 199       *x = 0;
 200
 201    if (y)
 202       *y = 0;
 203
 204    if (width)
 205       *width = ((xcb_screen_t *)_ecore_xcb_screen)->width_in_pixels;
 206
 207    if (height)
 208       *height = ((xcb_screen_t *)_ecore_xcb_screen)->height_in_pixels;
 209
 210    return 0;
 211 } /* ecore_x_xinerama_screen_geometry_get */
 212