src/lib/ecore_x/xcb/ecore_xcb_xinerama.c

   1 /*
   2  * vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
   3  */
   4
   5 #include "ecore_xcb_private.h"
   6
   7
   8 /**
   9  * @defgroup Ecore_X_Xinerama_Group X Xinerama Extension Functions
  10  *
  11  * Functions related to the X Xinerama extension.
  12  */
  13
  14
  15 #ifdef ECORE_XCB_XINERAMA
  16 static int _xinerama_available = 0;
  17 static xcb_xinerama_query_version_cookie_t _ecore_xcb_xinerama_init_cookie;
  18 #endif /* ECORE_XCB_XINERAMA */
  19
  20
  21 /* To avoid round trips, the initialization is separated in 2
  22    functions: _ecore_xcb_xinerama_init and
  23    _ecore_xcb_xinerama_init_finalize. The first one gets the cookies and
  24    the second one gets the replies. */
  25
  26 void
  27 _ecore_x_xinerama_init(const xcb_query_extension_reply_t *reply)
  28 {
  29 #ifdef ECORE_XCB_XINERAMA
  30    if (reply && (reply->present))
  31       _ecore_xcb_xinerama_init_cookie = xcb_xinerama_query_version_unchecked(_ecore_xcb_conn, 1, 2);
  32 #endif /* ECORE_XCB_XINERAMA */
  33 }
  34
  35 void
  36 _ecore_x_xinerama_init_finalize(void)
  37 {
  38 #ifdef ECORE_XCB_XINERAMA
  39    xcb_xinerama_query_version_reply_t *reply;
  40
  41    reply = xcb_xinerama_query_version_reply(_ecore_xcb_conn,
  42                                           _ecore_xcb_xinerama_init_cookie, NULL);
  43
  44    if (reply)
  45      {
  46         if ((reply->major >= 1) &&
  47             (reply->minor >= 1))
  48           _xinerama_available = 1;
  49         free(reply);
  50      }
  51 #endif /* ECORE_XCB_XINERAMA */
  52 }
  53
  54
  55 /**
  56  * Return whether the X server supports the Xinerama Extension.
  57  * @return 1 if the X Xinerama Extension is available, 0 otherwise.
  58  *
  59  * Return 1 if the X server supports the Fixes Xinerama version 1.1,
  60  * 0 otherwise.
  61  * @ingroup Ecore_X_Xinerama_Group
  62  */
  63 EAPI int
  64 ecore_x_xinerama_query(void)
  65 {
  66 #ifdef ECORE_XCB_XINERAMA
  67    return _xinerama_available;
  68 #else
  69    return 0;
  70 #endif /* ECORE_XCB_XINERAMA */
  71 }
  72
  73
  74 /**
  75  * Sends the XineramaQueryScreens request.
  76  * @ingroup Ecore_X_Xinerama_Group
  77  */
  78 EAPI void
  79 ecore_x_xinerama_query_screens_prefetch(void)
  80 {
  81 #ifdef ECORE_XCB_XINERAMA
  82    xcb_xinerama_query_screens_cookie_t cookie;
  83
  84    cookie = xcb_xinerama_query_screens_unchecked(_ecore_xcb_conn);
  85    _ecore_xcb_cookie_cache(cookie.sequence);
  86 #endif /* ECORE_XCB_XINERAMA */
  87 }
  88
  89
  90 /**
  91  * Gets the reply of the XineramaQueryScreens request sent by ecore_x_xinerama_query_screens_prefetch().
  92  * @ingroup Ecore_X_Xinerama_Group
  93  */
  94 EAPI void
  95 ecore_x_xinerama_query_screens_fetch(void)
  96 {
  97 #ifdef ECORE_XCB_XINERAMA
  98    xcb_xinerama_query_screens_cookie_t cookie;
  99    xcb_xinerama_query_screens_reply_t *reply;
 100
 101    cookie.sequence = _ecore_xcb_cookie_get();
 102    reply = xcb_xinerama_query_screens_reply(_ecore_xcb_conn, cookie, NULL);
 103    _ecore_xcb_reply_cache(reply);
 104 #endif /* ECORE_XCB_XINERAMA */
 105 }
 106
 107
 108 /**
 109  * Return the number of screens.
 110  * @return The screen count.
 111  *
 112  * Return the number of screens.
 113  *
 114  * To use this function, you must call before, and in order,
 115  * ecore_x_xinerama_query_screens_prefetch(), which sends the XineramaQueryScreens request,
 116  * then ecore_x_xinerama_query_screens_fetch(), which gets the reply.
 117  * @ingroup Ecore_X_Xinerama_Group
 118  */
 119 EAPI int
 120 ecore_x_xinerama_screen_count_get(void)
 121 {
 122    int                                 screen_count = 0;
 123 #ifdef ECORE_XCB_XINERAMA
 124    xcb_xinerama_screen_info_iterator_t iter;
 125    xcb_xinerama_query_screens_reply_t *reply;
 126
 127    reply = _ecore_xcb_reply_get();
 128    if (!reply) return 0;
 129
 130    iter = xcb_xinerama_query_screens_screen_info_iterator(reply);
 131    screen_count = iter.rem;
 132 #endif /* ECORE_XCB_XINERAMA */
 133
 134    return screen_count;
 135 }
 136
 137
 138 /**
 139  * Get the geometry of the screen.
 140  * @param screen The screen (Unused).
 141  * @param x      The X coordinate of the screen.
 142  * @param y      The Y coordinate of the screen
 143  * @param width  The width of the screen
 144  * @param height The height of the screen
 145  * @return       1 on success, 0 otherwise.
 146  *
 147  * Get the geometry of the screen whose number is @p screen. The
 148  * returned values are stored in @p x, @p y, @p width and @p height.
 149  *
 150  * To use this function, you must call before, and in order,
 151  * ecore_x_xinerama_query_screens_prefetch(), which sends the XineramaQueryScreens request,
 152  * then ecore_x_xinerama_query_screens_fetch(), which gets the reply.
 153  * @ingroup Ecore_X_Xinerama_Group
 154  */
 155 EAPI int
 156 ecore_x_xinerama_screen_geometry_get(int  screen,
 157                                      int *x,
 158                                      int *y,
 159                                      int *width,
 160                                      int *height)
 161 {
 162 #ifdef ECORE_XCB_XINERAMA
 163    xcb_xinerama_screen_info_iterator_t iter;
 164    xcb_xinerama_query_screens_reply_t *reply;
 165
 166    reply = _ecore_xcb_reply_get();
 167    if (!reply)
 168      {
 169         if (x) *x = 0;
 170         if (y) *y = 0;
 171         if (width) *width = ((xcb_screen_t *)_ecore_xcb_screen)->width_in_pixels;
 172         if (height) *height = ((xcb_screen_t *)_ecore_xcb_screen)->height_in_pixels;
 173
 174         return 0;
 175      }
 176
 177    iter = xcb_xinerama_query_screens_screen_info_iterator(reply);
 178    for (; iter.rem; screen--, xcb_xinerama_screen_info_next(&iter))
 179      {
 180         if (screen == 0)
 181           {
 182              if (x) *x = iter.data->x_org;
 183              if (y) *y = iter.data->y_org;
 184              if (width) *width = iter.data->width;
 185              if (height) *height = iter.data->height;
 186              return 1;
 187           }
 188      }
 189 #endif /* ECORE_XCB_XINERAMA */
 190
 191    if (x) *x = 0;
 192    if (y) *y = 0;
 193    if (width) *width = ((xcb_screen_t *)_ecore_xcb_screen)->width_in_pixels;
 194    if (height) *height = ((xcb_screen_t *)_ecore_xcb_screen)->height_in_pixels;
 195
 196    return 0;
 197 }