test/integration/Xinerama.c

   1 /* $Xorg: XPanoramiX.c,v 1.4 2000/08/17 19:45:51 cpqbld Exp $ */
   2 /*****************************************************************
   3 Copyright (c) 1991, 1997 Digital Equipment Corporation, Maynard, Massachusetts.
   4 Permission is hereby granted, free of charge, to any person obtaining a copy
   5 of this software and associated documentation files (the "Software"), to deal
   6 in the Software without restriction, including without limitation the rights
   7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8 copies of the Software.
   9
  10 The above copyright notice and this permission notice shall be included in
  11 all copies or substantial portions of the Software.
  12
  13 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  16 DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING,
  17 BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR OTHER LIABILITY,
  18 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
  19 IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of Digital Equipment Corporation
  22 shall not be used in advertising or otherwise to promote the sale, use or other
  23 dealings in this Software without prior written authorization from Digital
  24 Equipment Corporation.
  25 ******************************************************************/
  26 /* $XFree86: xc/lib/Xinerama/Xinerama.c,v 1.2 2001/07/23 17:20:28 dawes Exp $ */
  27
  28 #include <X11/Xlibint.h>
  29 #include <X11/extensions/Xinerama.h>
  30 #include <stdio.h>
  31
  32 static int num_screens = -1;
  33 static struct
  34     {
  35     int x_org, y_org;
  36     int width, height;
  37     } screen_info[ 10 ];
  38
  39 static void skipComments( FILE* f )
  40     {
  41     char tmp[ 4096 ];
  42     for(;;)
  43         {
  44         int c;
  45         for(;;)
  46             {
  47             c = fgetc( f );
  48             if( c == EOF )
  49                 return;
  50             if( c != ' ' && c != '\t' && c != '\n' )
  51                 break;
  52             }
  53         if( c != '#' )
  54             {
  55             ungetc( c, f );
  56             return;
  57             }
  58         fgets( tmp, 4096, f );
  59         }
  60     }
  61
  62 static void initFakeXinerama()
  63     {
  64     const char* home;
  65     char buf[ 4096 ];
  66     FILE* f;
  67     int i;
  68     if( num_screens != -1 )
  69         return;
  70     num_screens = 0;
  71     home = getenv( "HOME" );
  72     if( home == NULL )
  73         return;
  74     sprintf( buf, "%s/.fakexinerama", home );
  75     f = fopen( buf, "r" );
  76     if( f == NULL )
  77         return;
  78     skipComments( f );
  79     if( fscanf( f, "%d\n", &num_screens ) != 1 )
  80         {
  81         num_screens = 0;
  82         fclose( f );
  83         return;
  84         }
  85     if( num_screens >= 10 )
  86         num_screens = 10;
  87     for( i = 0;
  88          i < num_screens;
  89          ++i )
  90         {
  91         skipComments( f );
  92         if( fscanf( f, "%d %d %d %d\n", &screen_info[ i ].x_org, &screen_info[ i ].y_org,
  93             &screen_info[ i ].width, &screen_info[ i ].height ) != 4 )
  94             {
  95             num_screens = 0;
  96             fclose( f );
  97             return;
  98             }
  99         }
 100     fclose( f );
 101     }
 102
 103 Bool XineramaQueryExtension (
 104    Display *dpy,
 105    int     *event_base,
 106    int     *error_base
 107 )
 108 {
 109     (void) dpy;
 110     *event_base = 0;
 111     *error_base = 0;
 112     return True;
 113 }
 114
 115 Status XineramaQueryVersion(
 116    Display *dpy,
 117    int     *major,
 118    int     *minor
 119 )
 120 {
 121     (void) dpy;
 122     *major = 1;
 123     *minor = 1;
 124     return 1;
 125 }
 126
 127 Bool XineramaIsActive(Display *dpy)
 128 {
 129     (void) dpy;
 130     initFakeXinerama();
 131     return num_screens != 0;
 132 }
 133
 134 XineramaScreenInfo *
 135 XineramaQueryScreens(
 136    Display *dpy,
 137    int     *number
 138 )
 139 {
 140     XineramaScreenInfo          *scrnInfo = NULL;
 141     initFakeXinerama();
 142     if(num_screens) {
 143         if((scrnInfo = Xmalloc(sizeof(XineramaScreenInfo) * num_screens))) {
 144             int i;
 145
 146             for(i = 0; i < num_screens; i++) {
 147                 scrnInfo[i].screen_number = i;
 148                 scrnInfo[i].x_org         = screen_info[ i ].x_org;
 149                 scrnInfo[i].y_org         = screen_info[ i ].y_org;
 150                 scrnInfo[i].width         = screen_info[ i ].width;
 151                 scrnInfo[i].height        = screen_info[ i ].height;
 152             }
 153
 154             *number = num_screens;
 155         } else
 156             ;
 157     }
 158     return scrnInfo;
 159 }