mdw@git.distorted.org.uk Git - mup/blob - mup/mupdisp/init.c

   1
   2 /* Copyright (c) 1995, 1997, 1998, 1999, 2000, 2002 by Arkkra Enterprises */
   3 /* All rights reserved */
   4
   5 /* initialization table and routine for Mup/Ghostscript display program */
   6
   7 /* when adding support for additional terminal types, you will need to
   8  * add the declarations of relevant functions and add an entry to the
   9  * Config table */
  10
  11
  12 #include <string.h>
  13 #include <stdlib.h>
  14 #include "mupdisp.h"
  15
  16 /* declare the functions, etc for each supported terminal type */
  17
  18 #ifdef XWINDOW
  19 extern void parse_X_options P((void));
  20 extern void xterm_setup P((void));
  21 extern void xterm_cleanup P((int status));
  22 extern void xterm_draw P((int line, int small));
  23 extern void xterm_user_interf P((void));
  24 extern void xterm_error P((char *msg));
  25 extern void xterm_raster P((unsigned char *bitmap, int width, int height));
  26 #define XVIDLINES       (400)   /* request 400 lines when in 640x480 mode */
  27 #endif
  28
  29 #if defined(AT386) && ! defined(__DOS__)
  30 extern void at386_setup P((void));
  31 extern void at386_cleanup P((int status));
  32 extern void at386_draw P((int line, int small));
  33 extern void at386_user_interf P((void));
  34 extern void at386_error P((char *msg));
  35 extern void at386_raster P((unsigned char *bitmap, int width, int height));
  36 #define VIDLINES        (350)   /* for 640x350 display mode */
  37 #endif
  38
  39 #if defined(linux) && ! defined(NO_VGA_LIB)
  40 extern void vgalib_setup P((void));
  41 extern void vgalib_cleanup P((int status));
  42 extern void vgalib_draw P((int line, int small));
  43 extern void vgalib_user_interf P((void));
  44 extern void vgalib_error P((char *msg));
  45 extern void vgalib_raster P((unsigned char *bitmap, int width, int height));
  46 #define LINVGAVIDLINES        (480)   /* for 640x480 display mode */
  47 #endif
  48
  49 #ifdef __WATCOMC__
  50 extern void dos_setup P((void));
  51 extern void dos_cleanup P((int status));
  52 extern void dos_draw P((int line, int small));
  53 extern void dos_user_interf P((void));
  54 extern void dos_error P((char *msg));
  55 extern void dos_raster P((unsigned char *bitmap, int width, int height));
  56 /* video lines determined at run time */
  57 #endif
  58 \f
  59
  60
  61 /* list of supported $TERM types and which functions and parameters to use
  62  * to implement them. To support a new terminal type, write appropriate
  63  * functions, and add to the Config table.
  64  */
  65 struct CONFIG Config [] = {
  66
  67 #if defined(AT386) && ! defined(__DOS__)
  68         {
  69                 "AT386",                /* terminal type name */
  70                 at386_setup,            /* setup function */
  71                 at386_cleanup,          /* cleanup function */
  72                 at386_draw,             /* function for drawing a screen full of bits */
  73                 at386_user_interf,      /* function to read user input and call do_cmd on it */
  74                 at386_error,            /* error reporting function */
  75                 at386_raster,           /* function to display a raster bitmap centered on screen */
  76                 VIDLINES,               /* screen vertical lines */
  77                 0.75                    /* aspect ratio */
  78         },
  79 #endif
  80
  81 #ifdef XWINDOW
  82         {
  83                 "xterm",                /* terminal type name */
  84                 xterm_setup,            /* setup function */
  85                 xterm_cleanup,          /* cleanup function */
  86                 xterm_draw,             /* function for drawing a screen full of bits */
  87                 xterm_user_interf,      /* function to read user input and call do_cmd on it */
  88                 xterm_error,            /* error reporting function */
  89                 xterm_raster,           /* function to display a raster bitmap centered on screen */
  90                 XVIDLINES,              /* screen vertical lines */
  91                 1.0                     /* aspect ratio */
  92         },
  93 #endif
  94
  95 #if defined(linux) && ! defined(NO_VGA_LIB)
  96         {
  97                 "linux",                /* terminal type name */
  98                 vgalib_setup,           /* setup function */
  99                 vgalib_cleanup,         /* cleanup function */
 100                 vgalib_draw,            /* function for drawing a screen full of bits */
 101                 vgalib_user_interf,     /* function to read user input and call do_cmd on it */
 102                 vgalib_error,           /* error reporting function */
 103                 vgalib_raster,          /* function to display a raster bitmap centered on screen */
 104                 LINVGAVIDLINES,         /* screen vertical lines */
 105                 1.0                     /* aspect ratio */
 106         },
 107
 108 #endif
 109 #ifdef __WATCOMC__
 110         {
 111                 "DOS",                  /* terminal type name */
 112                 dos_setup,              /* setup function */
 113                 dos_cleanup,            /* cleanup function */
 114                 dos_draw,               /* function for drawing a screen full of bits */
 115                 dos_user_interf,        /* function to read user input and call do_cmd on it */
 116                 dos_error,              /* error reporting function */
 117                 dos_raster,             /* function to display a raster bitmap centered on screen */
 118                 0,                      /* screen vertical lines--will get set at run time */
 119                 0.0                     /* aspect ratio adjust--will get set at run time */
 120         }
 121 #endif
 122 };
 123 \f
 124
 125 /* initialize. Make sure TERM is supported, and set up for it. */
 126
 127 void
 128 init()
 129
 130 {
 131         struct CONFIG *c_p;     /* terminal configuration info */
 132         char *termname;         /* $TERM */
 133         int numtypes;
 134 #ifdef XWINDOW
 135         struct CONFIG *xwindow_conf_p = 0;      /* info for running under X */
 136 #endif
 137
 138
 139 #ifdef __WATCOMC__
 140         termname = "DOS";
 141 #else
 142         if ((termname = getenv("TERM")) == NULL) {
 143                 fprintf(stderr, "can't determine $TERM\n");
 144                 generalcleanup(1);
 145         }
 146 #endif
 147
 148         /* find appropriate functions to use based on terminal type */
 149         numtypes = sizeof(Config) / sizeof(struct CONFIG);
 150         for (c_p = Config; numtypes > 0; c_p++, numtypes--) {
 151                 if (strcmp(c_p->termname, termname) == 0) {
 152                         Conf_info_p = c_p;
 153                         break;
 154                 }
 155 #ifdef XWINDOW
 156                 /* save the xwindow config. If we don't find a
 157                  * matching terminal type here, we're try some other
 158                  * tricks later to guess if we're running under X */
 159                 if (strcmp(c_p->termname, "xterm") == 0) {
 160                         xwindow_conf_p = c_p;
 161                 }
 162 #endif
 163         }
 164
 165 #ifdef XWINDOW
 166         if (Conf_info_p == (struct CONFIG *) 0) {
 167                 /* There can be several variations on xterm, so
 168                  * if $TERM at least starts with xterm, consider that
 169                  * good enough to try. And to try even harder to
 170                  * recognize if we're probably running under X, and
 171                  * thus the 'xterm' type will probably work, check if
 172                  * $DISPLAY is set. Chances are, if it is, we're probably
 173                  * in X. If it turns out we're not, we'll fail eventually,
 174                  * but we will have at least tried pretty hard
 175                  * to find something that would work... */
 176                 if (strncmp(termname, "xterm", 5) == 0 ||
 177                                 getenv("DISPLAY") != (char *) 0) {
 178                         Conf_info_p = xwindow_conf_p;
 179                 }
 180         }
 181 #endif
 182
 183         /* Make sure we managed to find a $TERM we can work with */
 184         if (Conf_info_p == (struct CONFIG *) 0 ) {
 185                 fprintf(stderr, "$TERM type not supported\n");
 186                 generalcleanup(1);
 187         }
 188
 189 #ifdef XWINDOW
 190         /* X has some extra options, so handle them */
 191         if (strcmp(Conf_info_p->termname, "xterm") == 0) {
 192                 parse_X_options();
 193         }
 194 #endif
 195 }