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
  69 #ifdef SONAME_LIBXINERAMA
  70
  71 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  72
  73 MAKE_FUNCPTR(XineramaQueryExtension);
  74 MAKE_FUNCPTR(XineramaQueryScreens);
  75
  76 static void load_xinerama(void)
  77 {
  78     void *handle;
  79
  80     if (!(handle = wine_dlopen(SONAME_LIBXINERAMA, RTLD_NOW, NULL, 0)))
  81     {
  82         WARN( "failed to open %s\n", SONAME_LIBXINERAMA );
  83         return;
  84     }
  85     pXineramaQueryExtension = wine_dlsym( handle, "XineramaQueryExtension", NULL, 0 );
  86     if (!pXineramaQueryExtension) WARN( "XineramaQueryScreens not found\n" );
  87     pXineramaQueryScreens = wine_dlsym( handle, "XineramaQueryScreens", NULL, 0 );
  88     if (!pXineramaQueryScreens) WARN( "XineramaQueryScreens not found\n" );
  89 }
  90
  91 static int query_screens(void)
  92 {
  93     int i, count, event_base, error_base;
  94     XineramaScreenInfo *screens;
  95
  96     if (!monitors)  /* first time around */
  97         load_xinerama();
  98
  99     if (!pXineramaQueryExtension || !pXineramaQueryScreens ||
 100         !pXineramaQueryExtension( gdi_display, &event_base, &error_base ) ||
 101         !(screens = pXineramaQueryScreens( gdi_display, &count ))) return 0;
 102
 103     if (monitors != &default_monitor) HeapFree( GetProcessHeap(), 0, monitors );
 104     if ((monitors = HeapAlloc( GetProcessHeap(), 0, count * sizeof(*monitors) )))
 105     {
 106         nb_monitors = count;
 107         for (i = 0; i < nb_monitors; i++)
 108         {
 109             monitors[i].cbSize = sizeof( monitors[i] );
 110             monitors[i].rcMonitor.left   = screens[i].x_org;
 111             monitors[i].rcMonitor.top    = screens[i].y_org;
 112             monitors[i].rcMonitor.right  = screens[i].x_org + screens[i].width;
 113             monitors[i].rcMonitor.bottom = screens[i].y_org + screens[i].height;
 114             monitors[i].rcWork           = monitors[i].rcMonitor;
 115             monitors[i].dwFlags          = 0;
 116             /* FIXME: using the same device name for all monitors for now */
 117             lstrcpyW( monitors[i].szDevice, default_monitor.szDevice );
 118         }
 119
 120         get_primary()->dwFlags |= MONITORINFOF_PRIMARY;
 121     }
 122     else count = 0;
 123
 124     XFree( screens );
 125     return count;
 126 }
 127
 128 #else  /* SONAME_LIBXINERAMA */
 129
 130 static inline int query_screens(void)
 131 {
 132     return 0;
 133 }
 134
 135 #endif  /* SONAME_LIBXINERAMA */
 136
 137 void xinerama_init( unsigned int width, unsigned int height )
 138 {
 139     MONITORINFOEXW *primary;
 140     int i;
 141
 142     wine_tsx11_lock();
 143
 144     SetRect( &virtual_screen_rect, 0, 0, width, height );
 145
 146     if (root_window != DefaultRootWindow( gdi_display ) || !query_screens())
 147     {
 148         default_monitor.rcWork = default_monitor.rcMonitor = virtual_screen_rect;
 149         nb_monitors = 1;
 150         monitors = &default_monitor;
 151     }
 152
 153     primary = get_primary();
 154
 155     /* coordinates (0,0) have to point to the primary monitor origin */
 156     OffsetRect( &virtual_screen_rect, -primary->rcMonitor.left, -primary->rcMonitor.top );
 157     for (i = 0; i < nb_monitors; i++)
 158     {
 159         OffsetRect( &monitors[i].rcMonitor, virtual_screen_rect.left, virtual_screen_rect.top );
 160         OffsetRect( &monitors[i].rcWork, virtual_screen_rect.left, virtual_screen_rect.top );
 161         TRACE( "monitor %p: %s%s\n",
 162                index_to_monitor(i), wine_dbgstr_rect(&monitors[i].rcMonitor),
 163                (monitors[i].dwFlags & MONITORINFOF_PRIMARY) ? " (primary)" : "" );
 164     }
 165
 166     screen_width = primary->rcMonitor.right - primary->rcMonitor.left;
 167     screen_height = primary->rcMonitor.bottom - primary->rcMonitor.top;
 168     TRACE( "virtual size: %s primary size: %dx%d\n",
 169            wine_dbgstr_rect(&virtual_screen_rect), screen_width, screen_height );
 170
 171     wine_tsx11_unlock();
 172     ClipCursor( NULL );  /* reset the cursor clip rectangle */
 173 }
 174
 175
 176 /***********************************************************************
 177  *              X11DRV_GetMonitorInfo  (X11DRV.@)
 178  */
 179 BOOL X11DRV_GetMonitorInfo( HMONITOR handle, LPMONITORINFO info )
 180 {
 181     int i = monitor_to_index( handle );
 182
 183     if (i == -1)
 184     {
 185         SetLastError( ERROR_INVALID_HANDLE );
 186         return FALSE;
 187     }
 188     info->rcMonitor = monitors[i].rcMonitor;
 189     info->rcWork = monitors[i].rcWork;
 190     info->dwFlags = monitors[i].dwFlags;
 191     if (info->cbSize >= sizeof(MONITORINFOEXW))
 192         lstrcpyW( ((MONITORINFOEXW *)info)->szDevice, monitors[i].szDevice );
 193     return TRUE;
 194 }
 195
 196
 197 /***********************************************************************
 198  *              X11DRV_EnumDisplayMonitors  (X11DRV.@)
 199  */
 200 BOOL X11DRV_EnumDisplayMonitors( HDC hdc, LPRECT rect, MONITORENUMPROC proc, LPARAM lp )
 201 {
 202     int i;
 203
 204     if (hdc)
 205     {
 206         POINT origin;
 207         RECT limit;
 208
 209         if (!GetDCOrgEx( hdc, &origin )) return FALSE;
 210         if (GetClipBox( hdc, &limit ) == ERROR) return FALSE;
 211
 212         if (rect && !IntersectRect( &limit, &limit, rect )) return TRUE;
 213
 214         for (i = 0; i < nb_monitors; i++)
 215         {
 216             RECT monrect = monitors[i].rcMonitor;
 217             OffsetRect( &monrect, -origin.x, -origin.y );
 218             if (IntersectRect( &monrect, &monrect, &limit ))
 219                 if (!proc( index_to_monitor(i), hdc, &monrect, lp )) break;
 220         }
 221     }
 222     else
 223     {
 224         for (i = 0; i < nb_monitors; i++)
 225         {
 226             RECT unused;
 227             if (!rect || IntersectRect( &unused, &monitors[i].rcMonitor, rect ))
 228                 if (!proc( index_to_monitor(i), 0, &monitors[i].rcMonitor, lp )) break;
 229         }
 230     }
 231     return TRUE;
 232 }