dlls/winex11.drv/xinerama.c

   1 /*
   2  * Xinerama support
   3  *
   4  * Copyright 2006 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <X11/Xlib.h>
  27 #ifdef HAVE_X11_EXTENSIONS_XINERAMA_H
  28 #include <X11/extensions/Xinerama.h>
  29 #endif
  30 #include "wine/library.h"
  31 #include "x11drv.h"
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(x11drv);
  35
  36 static RECT virtual_screen_rect;
  37
  38 static MONITORINFOEXW default_monitor =
  39 {
  40     sizeof(default_monitor),    /* cbSize */
  41     { 0, 0, 0, 0 },             /* rcMonitor */
  42     { 0, 0, 0, 0 },             /* rcWork */
  43     MONITORINFOF_PRIMARY,       /* dwFlags */
  44     { '\\','\\','.','\\','D','I','S','P','L','A','Y','1',0 }   /* szDevice */
  45 };
  46
  47 static MONITORINFOEXW *monitors;
  48 static int nb_monitors;
  49
  50 static inline MONITORINFOEXW *get_primary(void)
  51 {
  52     /* default to 0 if specified primary is invalid */
  53     int idx = primary_monitor;
  54     if (idx >= nb_monitors) idx = 0;
  55     return &monitors[idx];
  56 }
  57
  58 static inline HMONITOR index_to_monitor( int index )
  59 {
  60     return (HMONITOR)(UINT_PTR)(index + 1);
  61 }
  62
  63 static inline int monitor_to_index( HMONITOR handle )
  64 {
  65     UINT_PTR index = (UINT_PTR)handle;
  66     if (index < 1 || index > nb_monitors) return -1;
  67     return index - 1;
  68 }
  69
  70 static void query_work_area( RECT *rc_work )
  71 {
  72     Atom type;
  73     int format;
  74     unsigned long count, remaining;
  75     long *work_area;
  76
  77     if (!XGetWindowProperty( gdi_display, DefaultRootWindow(gdi_display), x11drv_atom(_NET_WORKAREA), 0,
  78                              ~0, False, XA_CARDINAL, &type, &format, &count,
  79                              &remaining, (unsigned char **)&work_area ))
  80     {
  81         if (type == XA_CARDINAL && format == 32 && count >= 4)
  82         {
  83             SetRect( rc_work, work_area[0], work_area[1],
  84                      work_area[0] + work_area[2], work_area[1] + work_area[3] );
  85         }
  86         XFree( work_area );
  87     }
  88 }
  89
  90 #ifdef SONAME_LIBXINERAMA
  91
  92 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  93
  94 MAKE_FUNCPTR(XineramaQueryExtension);
  95 MAKE_FUNCPTR(XineramaQueryScreens);
  96
  97 static void load_xinerama(void)
  98 {
  99     void *handle;
 100
 101     if (!(handle = wine_dlopen(SONAME_LIBXINERAMA, RTLD_NOW, NULL, 0)))
 102     {
 103         WARN( "failed to open %s\n", SONAME_LIBXINERAMA );
 104         return;
 105     }
 106     pXineramaQueryExtension = wine_dlsym( handle, "XineramaQueryExtension", NULL, 0 );
 107     if (!pXineramaQueryExtension) WARN( "XineramaQueryScreens not found\n" );
 108     pXineramaQueryScreens = wine_dlsym( handle, "XineramaQueryScreens", NULL, 0 );
 109     if (!pXineramaQueryScreens) WARN( "XineramaQueryScreens not found\n" );
 110 }
 111
 112 static int query_screens(void)
 113 {
 114     int i, count, event_base, error_base;
 115     XineramaScreenInfo *screens;
 116     RECT rc_work = {0, 0, 0, 0};
 117
 118     if (!monitors)  /* first time around */
 119         load_xinerama();
 120
 121     query_work_area( &rc_work );
 122
 123     if (!pXineramaQueryExtension || !pXineramaQueryScreens ||
 124         !pXineramaQueryExtension( gdi_display, &event_base, &error_base ) ||
 125         !(screens = pXineramaQueryScreens( gdi_display, &count ))) return 0;
 126
 127     if (monitors != &default_monitor) HeapFree( GetProcessHeap(), 0, monitors );
 128     if ((monitors = HeapAlloc( GetProcessHeap(), 0, count * sizeof(*monitors) )))
 129     {
 130         nb_monitors = count;
 131         for (i = 0; i < nb_monitors; i++)
 132         {
 133             monitors[i].cbSize = sizeof( monitors[i] );
 134             monitors[i].rcMonitor.left   = screens[i].x_org;
 135             monitors[i].rcMonitor.top    = screens[i].y_org;
 136             monitors[i].rcMonitor.right  = screens[i].x_org + screens[i].width;
 137             monitors[i].rcMonitor.bottom = screens[i].y_org + screens[i].height;
 138             monitors[i].dwFlags          = 0;
 139             if (!IntersectRect( &monitors[i].rcWork, &rc_work, &monitors[i].rcMonitor ))
 140                 monitors[i].rcWork = monitors[i].rcMonitor;
 141             /* FIXME: using the same device name for all monitors for now */
 142             lstrcpyW( monitors[i].szDevice, default_monitor.szDevice );
 143         }
 144
 145         get_primary()->dwFlags |= MONITORINFOF_PRIMARY;
 146     }
 147     else count = 0;
 148
 149     XFree( screens );
 150     return count;
 151 }
 152
 153 #else  /* SONAME_LIBXINERAMA */
 154
 155 static inline int query_screens(void)
 156 {
 157     return 0;
 158 }
 159
 160 #endif  /* SONAME_LIBXINERAMA */
 161
 162 POINT virtual_screen_to_root( INT x, INT y )
 163 {
 164     POINT pt;
 165     pt.x = x - virtual_screen_rect.left;
 166     pt.y = y - virtual_screen_rect.top;
 167     return pt;
 168 }
 169
 170 POINT root_to_virtual_screen( INT x, INT y )
 171 {
 172     POINT pt;
 173     pt.x = x + virtual_screen_rect.left;
 174     pt.y = y + virtual_screen_rect.top;
 175     return pt;
 176 }
 177
 178 RECT get_virtual_screen_rect(void)
 179 {
 180     return virtual_screen_rect;
 181 }
 182
 183 RECT get_primary_monitor_rect(void)
 184 {
 185     return get_primary()->rcMonitor;
 186 }
 187
 188 void xinerama_init( unsigned int width, unsigned int height )
 189 {
 190     MONITORINFOEXW *primary;
 191     int i;
 192     RECT rect;
 193
 194     SetRect( &rect, 0, 0, width, height );
 195
 196     if (root_window != DefaultRootWindow( gdi_display ) || !query_screens())
 197     {
 198         default_monitor.rcWork = default_monitor.rcMonitor = rect;
 199         if (root_window == DefaultRootWindow( gdi_display ))
 200             query_work_area( &default_monitor.rcWork );
 201         nb_monitors = 1;
 202         monitors = &default_monitor;
 203     }
 204
 205     primary = get_primary();
 206     SetRectEmpty( &virtual_screen_rect );
 207
 208     /* coordinates (0,0) have to point to the primary monitor origin */
 209     OffsetRect( &rect, -primary->rcMonitor.left, -primary->rcMonitor.top );
 210     for (i = 0; i < nb_monitors; i++)
 211     {
 212         OffsetRect( &monitors[i].rcMonitor, rect.left, rect.top );
 213         OffsetRect( &monitors[i].rcWork, rect.left, rect.top );
 214         UnionRect( &virtual_screen_rect, &virtual_screen_rect, &monitors[i].rcMonitor );
 215         TRACE( "monitor %p: %s work %s%s\n",
 216                index_to_monitor(i), wine_dbgstr_rect(&monitors[i].rcMonitor),
 217                wine_dbgstr_rect(&monitors[i].rcWork),
 218                (monitors[i].dwFlags & MONITORINFOF_PRIMARY) ? " (primary)" : "" );
 219     }
 220
 221     TRACE( "virtual size: %s primary: %s\n",
 222            wine_dbgstr_rect(&virtual_screen_rect), wine_dbgstr_rect(&primary->rcMonitor) );
 223 }
 224
 225
 226 /***********************************************************************
 227  *              X11DRV_GetMonitorInfo  (X11DRV.@)
 228  */
 229 BOOL CDECL X11DRV_GetMonitorInfo( HMONITOR handle, LPMONITORINFO info )
 230 {
 231     int i = monitor_to_index( handle );
 232
 233     if (i == -1)
 234     {
 235         SetLastError( ERROR_INVALID_HANDLE );
 236         return FALSE;
 237     }
 238     info->rcMonitor = monitors[i].rcMonitor;
 239     info->rcWork = monitors[i].rcWork;
 240     info->dwFlags = monitors[i].dwFlags;
 241     if (info->cbSize >= sizeof(MONITORINFOEXW))
 242         lstrcpyW( ((MONITORINFOEXW *)info)->szDevice, monitors[i].szDevice );
 243     return TRUE;
 244 }
 245
 246
 247 /***********************************************************************
 248  *              X11DRV_EnumDisplayMonitors  (X11DRV.@)
 249  */
 250 BOOL CDECL X11DRV_EnumDisplayMonitors( HDC hdc, LPRECT rect, MONITORENUMPROC proc, LPARAM lp )
 251 {
 252     int i;
 253
 254     if (hdc)
 255     {
 256         POINT origin;
 257         RECT limit;
 258
 259         if (!GetDCOrgEx( hdc, &origin )) return FALSE;
 260         if (GetClipBox( hdc, &limit ) == ERROR) return FALSE;
 261
 262         if (rect && !IntersectRect( &limit, &limit, rect )) return TRUE;
 263
 264         for (i = 0; i < nb_monitors; i++)
 265         {
 266             RECT monrect = monitors[i].rcMonitor;
 267             OffsetRect( &monrect, -origin.x, -origin.y );
 268             if (IntersectRect( &monrect, &monrect, &limit ))
 269                 if (!proc( index_to_monitor(i), hdc, &monrect, lp ))
 270                     return FALSE;
 271         }
 272     }
 273     else
 274     {
 275         for (i = 0; i < nb_monitors; i++)
 276         {
 277             RECT unused;
 278             if (!rect || IntersectRect( &unused, &monitors[i].rcMonitor, rect ))
 279                 if (!proc( index_to_monitor(i), 0, &monitors[i].rcMonitor, lp ))
 280                     return FALSE;
 281         }
 282     }
 283     return TRUE;
 284 }