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 MONITORINFOEXW default_monitor =
  37 {
  38     sizeof(default_monitor),    /* cbSize */
  39     { 0, 0, 0, 0 },             /* rcMonitor */
  40     { 0, 0, 0, 0 },             /* rcWork */
  41     MONITORINFOF_PRIMARY,       /* dwFlags */
  42     { '\\','\\','.','\\','D','I','S','P','L','A','Y','1',0 }   /* szDevice */
  43 };
  44
  45 static MONITORINFOEXW *monitors;
  46 static int nb_monitors;
  47
  48 static inline MONITORINFOEXW *get_primary(void)
  49 {
  50     /* default to 0 if specified primary is invalid */
  51     int idx = primary_monitor;
  52     if (idx >= nb_monitors) idx = 0;
  53     return &monitors[idx];
  54 }
  55
  56 static inline HMONITOR index_to_monitor( int index )
  57 {
  58     return (HMONITOR)(UINT_PTR)(index + 1);
  59 }
  60
  61 static inline int monitor_to_index( HMONITOR handle )
  62 {
  63     UINT_PTR index = (UINT_PTR)handle;
  64     if (index < 1 || index > nb_monitors) return -1;
  65     return index - 1;
  66 }
  67
  68 static void query_work_area( RECT *rc_work )
  69 {
  70     Atom type;
  71     int format;
  72     unsigned long count, remaining;
  73     long *work_area;
  74
  75     if (!XGetWindowProperty( gdi_display, DefaultRootWindow(gdi_display), x11drv_atom(_NET_WORKAREA), 0,
  76                              ~0, False, XA_CARDINAL, &type, &format, &count,
  77                              &remaining, (unsigned char **)&work_area ))
  78     {
  79         if (type == XA_CARDINAL && format == 32 && count >= 4)
  80         {
  81             SetRect( rc_work, work_area[0], work_area[1],
  82                      work_area[0] + work_area[2], work_area[1] + work_area[3] );
  83         }
  84         XFree( work_area );
  85     }
  86 }
  87
  88 #ifdef SONAME_LIBXINERAMA
  89
  90 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  91
  92 MAKE_FUNCPTR(XineramaQueryExtension);
  93 MAKE_FUNCPTR(XineramaQueryScreens);
  94
  95 static void load_xinerama(void)
  96 {
  97     void *handle;
  98
  99     if (!(handle = wine_dlopen(SONAME_LIBXINERAMA, RTLD_NOW, NULL, 0)))
 100     {
 101         WARN( "failed to open %s\n", SONAME_LIBXINERAMA );
 102         return;
 103     }
 104     pXineramaQueryExtension = wine_dlsym( handle, "XineramaQueryExtension", NULL, 0 );
 105     if (!pXineramaQueryExtension) WARN( "XineramaQueryScreens not found\n" );
 106     pXineramaQueryScreens = wine_dlsym( handle, "XineramaQueryScreens", NULL, 0 );
 107     if (!pXineramaQueryScreens) WARN( "XineramaQueryScreens not found\n" );
 108 }
 109
 110 static int query_screens(void)
 111 {
 112     int i, count, event_base, error_base;
 113     XineramaScreenInfo *screens;
 114     RECT rc_work = {0, 0, 0, 0};
 115
 116     if (!monitors)  /* first time around */
 117         load_xinerama();
 118
 119     query_work_area( &rc_work );
 120
 121     if (!pXineramaQueryExtension || !pXineramaQueryScreens ||
 122         !pXineramaQueryExtension( gdi_display, &event_base, &error_base ) ||
 123         !(screens = pXineramaQueryScreens( gdi_display, &count ))) return 0;
 124
 125     if (monitors != &default_monitor) HeapFree( GetProcessHeap(), 0, monitors );
 126     if ((monitors = HeapAlloc( GetProcessHeap(), 0, count * sizeof(*monitors) )))
 127     {
 128         nb_monitors = count;
 129         for (i = 0; i < nb_monitors; i++)
 130         {
 131             monitors[i].cbSize = sizeof( monitors[i] );
 132             monitors[i].rcMonitor.left   = screens[i].x_org;
 133             monitors[i].rcMonitor.top    = screens[i].y_org;
 134             monitors[i].rcMonitor.right  = screens[i].x_org + screens[i].width;
 135             monitors[i].rcMonitor.bottom = screens[i].y_org + screens[i].height;
 136             monitors[i].dwFlags          = 0;
 137             if (!IntersectRect( &monitors[i].rcWork, &rc_work, &monitors[i].rcMonitor ))
 138                 monitors[i].rcWork = monitors[i].rcMonitor;
 139             /* FIXME: using the same device name for all monitors for now */
 140             lstrcpyW( monitors[i].szDevice, default_monitor.szDevice );
 141         }
 142
 143         get_primary()->dwFlags |= MONITORINFOF_PRIMARY;
 144     }
 145     else count = 0;
 146
 147     XFree( screens );
 148     return count;
 149 }
 150
 151 #else  /* SONAME_LIBXINERAMA */
 152
 153 static inline int query_screens(void)
 154 {
 155     return 0;
 156 }
 157
 158 #endif  /* SONAME_LIBXINERAMA */
 159
 160 void xinerama_init( unsigned int width, unsigned int height )
 161 {
 162     MONITORINFOEXW *primary;
 163     int i;
 164     RECT rect;
 165
 166     SetRect( &rect, 0, 0, width, height );
 167
 168     if (root_window != DefaultRootWindow( gdi_display ) || !query_screens())
 169     {
 170         default_monitor.rcWork = default_monitor.rcMonitor = rect;
 171         if (root_window == DefaultRootWindow( gdi_display ))
 172             query_work_area( &default_monitor.rcWork );
 173         nb_monitors = 1;
 174         monitors = &default_monitor;
 175     }
 176
 177     primary = get_primary();
 178     SetRectEmpty( &virtual_screen_rect );
 179
 180     /* coordinates (0,0) have to point to the primary monitor origin */
 181     OffsetRect( &rect, -primary->rcMonitor.left, -primary->rcMonitor.top );
 182     for (i = 0; i < nb_monitors; i++)
 183     {
 184         OffsetRect( &monitors[i].rcMonitor, rect.left, rect.top );
 185         OffsetRect( &monitors[i].rcWork, rect.left, rect.top );
 186         UnionRect( &virtual_screen_rect, &virtual_screen_rect, &monitors[i].rcMonitor );
 187         TRACE( "monitor %p: %s work %s%s\n",
 188                index_to_monitor(i), wine_dbgstr_rect(&monitors[i].rcMonitor),
 189                wine_dbgstr_rect(&monitors[i].rcWork),
 190                (monitors[i].dwFlags & MONITORINFOF_PRIMARY) ? " (primary)" : "" );
 191     }
 192
 193     screen_width = primary->rcMonitor.right - primary->rcMonitor.left;
 194     screen_height = primary->rcMonitor.bottom - primary->rcMonitor.top;
 195     TRACE( "virtual size: %s primary size: %dx%d\n",
 196            wine_dbgstr_rect(&virtual_screen_rect), screen_width, screen_height );
 197 }
 198
 199
 200 /***********************************************************************
 201  *              X11DRV_GetMonitorInfo  (X11DRV.@)
 202  */
 203 BOOL CDECL X11DRV_GetMonitorInfo( HMONITOR handle, LPMONITORINFO info )
 204 {
 205     int i = monitor_to_index( handle );
 206
 207     if (i == -1)
 208     {
 209         SetLastError( ERROR_INVALID_HANDLE );
 210         return FALSE;
 211     }
 212     info->rcMonitor = monitors[i].rcMonitor;
 213     info->rcWork = monitors[i].rcWork;
 214     info->dwFlags = monitors[i].dwFlags;
 215     if (info->cbSize >= sizeof(MONITORINFOEXW))
 216         lstrcpyW( ((MONITORINFOEXW *)info)->szDevice, monitors[i].szDevice );
 217     return TRUE;
 218 }
 219
 220
 221 /***********************************************************************
 222  *              X11DRV_EnumDisplayMonitors  (X11DRV.@)
 223  */
 224 BOOL CDECL X11DRV_EnumDisplayMonitors( HDC hdc, LPRECT rect, MONITORENUMPROC proc, LPARAM lp )
 225 {
 226     int i;
 227
 228     if (hdc)
 229     {
 230         POINT origin;
 231         RECT limit;
 232
 233         if (!GetDCOrgEx( hdc, &origin )) return FALSE;
 234         if (GetClipBox( hdc, &limit ) == ERROR) return FALSE;
 235
 236         if (rect && !IntersectRect( &limit, &limit, rect )) return TRUE;
 237
 238         for (i = 0; i < nb_monitors; i++)
 239         {
 240             RECT monrect = monitors[i].rcMonitor;
 241             OffsetRect( &monrect, -origin.x, -origin.y );
 242             if (IntersectRect( &monrect, &monrect, &limit ))
 243                 if (!proc( index_to_monitor(i), hdc, &monrect, lp ))
 244                     return FALSE;
 245         }
 246     }
 247     else
 248     {
 249         for (i = 0; i < nb_monitors; i++)
 250         {
 251             RECT unused;
 252             if (!rect || IntersectRect( &unused, &monitors[i].rcMonitor, rect ))
 253                 if (!proc( index_to_monitor(i), 0, &monitors[i].rcMonitor, lp ))
 254                     return FALSE;
 255         }
 256     }
 257     return TRUE;
 258 }