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     // re-init every time we're invoked, because we want to be able to test
  69     // adding/removing screens
  70     //if( num_screens != -1 )
  71     //    return;
  72     num_screens = 0;
  73     home = getenv( "HOME" );
  74     if( home == NULL )
  75         return;
  76     sprintf( buf, "%s/.fakexinerama", home );
  77     f = fopen( buf, "r" );
  78     if( f == NULL )
  79         return;
  80     skipComments( f );
  81     if( fscanf( f, "%d\n", &num_screens ) != 1 )
  82         {
  83         num_screens = 0;
  84         fclose( f );
  85         return;
  86         }
  87     if( num_screens >= 10 )
  88         num_screens = 10;
  89     for( i = 0;
  90          i < num_screens;
  91          ++i )
  92         {
  93         skipComments( f );
  94         if( fscanf( f, "%d %d %d %d\n", &screen_info[ i ].x_org, &screen_info[ i ].y_org,
  95             &screen_info[ i ].width, &screen_info[ i ].height ) != 4 )
  96             {
  97             num_screens = 0;
  98             fclose( f );
  99             return;
 100             }
 101         }
 102     fclose( f );
 103     }
 104
 105 Bool XineramaQueryExtension (
 106    Display *dpy,
 107    int     *event_base,
 108    int     *error_base
 109 )
 110 {
 111     (void) dpy;
 112     *event_base = 0;
 113     *error_base = 0;
 114     return True;
 115 }
 116
 117 Status XineramaQueryVersion(
 118    Display *dpy,
 119    int     *major,
 120    int     *minor
 121 )
 122 {
 123     (void) dpy;
 124     *major = 1;
 125     *minor = 1;
 126     return 1;
 127 }
 128
 129 Bool XineramaIsActive(Display *dpy)
 130 {
 131     (void) dpy;
 132     initFakeXinerama();
 133     return num_screens != 0;
 134 }
 135
 136 XineramaScreenInfo *
 137 XineramaQueryScreens(
 138    Display *dpy,
 139    int     *number
 140 )
 141 {
 142     XineramaScreenInfo          *scrnInfo = NULL;
 143     initFakeXinerama();
 144     if(num_screens) {
 145         if((scrnInfo = Xmalloc(sizeof(XineramaScreenInfo) * num_screens))) {
 146             int i;
 147
 148             for(i = 0; i < num_screens; i++) {
 149                 scrnInfo[i].screen_number = i;
 150                 scrnInfo[i].x_org         = screen_info[ i ].x_org;
 151                 scrnInfo[i].y_org         = screen_info[ i ].y_org;
 152                 scrnInfo[i].width         = screen_info[ i ].width;
 153                 scrnInfo[i].height        = screen_info[ i ].height;
 154             }
 155
 156             *number = num_screens;
 157         } else
 158             ;
 159     }
 160     return scrnInfo;
 161 }