Import upstream version 5.3.

[mup] / mup / mupdisp / init.c

/* Copyright (c) 1995, 1997, 1998, 1999, 2000, 2002 by Arkkra Enterprises */
/* All rights reserved */

/* initialization table and routine for Mup/Ghostscript display program */

/* when adding support for additional terminal types, you will need to
 * add the declarations of relevant functions and add an entry to the
 * Config table */


#include <string.h>
#include <stdlib.h>
#include "mupdisp.h"

/* declare the functions, etc for each supported terminal type */

#ifdef XWINDOW
extern void parse_X_options P((void));
extern void xterm_setup P((void));
extern void xterm_cleanup P((int status));
extern void xterm_draw P((int line, int small));
extern void xterm_user_interf P((void));
extern void xterm_error P((char *msg));
extern void xterm_raster P((unsigned char *bitmap, int width, int height));
#define XVIDLINES       (400)   /* request 400 lines when in 640x480 mode */
#endif

#if defined(AT386) && ! defined(__DOS__)
extern void at386_setup P((void));
extern void at386_cleanup P((int status));
extern void at386_draw P((int line, int small));
extern void at386_user_interf P((void));
extern void at386_error P((char *msg));
extern void at386_raster P((unsigned char *bitmap, int width, int height));
#define VIDLINES        (350)   /* for 640x350 display mode */
#endif

#if defined(linux) && ! defined(NO_VGA_LIB)
extern void vgalib_setup P((void));
extern void vgalib_cleanup P((int status));
extern void vgalib_draw P((int line, int small));
extern void vgalib_user_interf P((void));
extern void vgalib_error P((char *msg));
extern void vgalib_raster P((unsigned char *bitmap, int width, int height));
#define LINVGAVIDLINES        (480)   /* for 640x480 display mode */
#endif

#ifdef __WATCOMC__
extern void dos_setup P((void));
extern void dos_cleanup P((int status));
extern void dos_draw P((int line, int small));
extern void dos_user_interf P((void));
extern void dos_error P((char *msg));
extern void dos_raster P((unsigned char *bitmap, int width, int height));
/* video lines determined at run time */
#endif
\f


/* list of supported $TERM types and which functions and parameters to use
 * to implement them. To support a new terminal type, write appropriate
 * functions, and add to the Config table.
 */
struct CONFIG Config [] = {

#if defined(AT386) && ! defined(__DOS__)
	{
		"AT386",		/* terminal type name */
		at386_setup,		/* setup function */
		at386_cleanup,		/* cleanup function */
		at386_draw,		/* function for drawing a screen full of bits */
		at386_user_interf,	/* function to read user input and call do_cmd on it */
		at386_error,		/* error reporting function */
		at386_raster,		/* function to display a raster bitmap centered on screen */
		VIDLINES,		/* screen vertical lines */
		0.75			/* aspect ratio */
	},
#endif

#ifdef XWINDOW
	{
		"xterm",		/* terminal type name */
		xterm_setup,		/* setup function */
		xterm_cleanup,		/* cleanup function */
		xterm_draw,		/* function for drawing a screen full of bits */
		xterm_user_interf,	/* function to read user input and call do_cmd on it */
		xterm_error,		/* error reporting function */
		xterm_raster,		/* function to display a raster bitmap centered on screen */
		XVIDLINES,		/* screen vertical lines */
		1.0			/* aspect ratio */
	},
#endif

#if defined(linux) && ! defined(NO_VGA_LIB)
	{
		"linux",		/* terminal type name */
		vgalib_setup,		/* setup function */
		vgalib_cleanup,		/* cleanup function */
		vgalib_draw,		/* function for drawing a screen full of bits */
		vgalib_user_interf,	/* function to read user input and call do_cmd on it */
		vgalib_error,		/* error reporting function */
		vgalib_raster,		/* function to display a raster bitmap centered on screen */
		LINVGAVIDLINES,		/* screen vertical lines */
		1.0			/* aspect ratio */
	},

#endif
#ifdef __WATCOMC__
	{
		"DOS",			/* terminal type name */
		dos_setup,		/* setup function */
		dos_cleanup,		/* cleanup function */
		dos_draw,		/* function for drawing a screen full of bits */
		dos_user_interf,	/* function to read user input and call do_cmd on it */
		dos_error,		/* error reporting function */
		dos_raster,		/* function to display a raster bitmap centered on screen */
		0,              	/* screen vertical lines--will get set at run time */
		0.0             	/* aspect ratio adjust--will get set at run time */
	}
#endif
};
\f

/* initialize. Make sure TERM is supported, and set up for it. */

void
init()

{
	struct CONFIG *c_p;     /* terminal configuration info */
	char *termname;         /* $TERM */
	int numtypes;
#ifdef XWINDOW
	struct CONFIG *xwindow_conf_p = 0;	/* info for running under X */
#endif


#ifdef __WATCOMC__
	termname = "DOS";
#else
	if ((termname = getenv("TERM")) == NULL) {
		fprintf(stderr, "can't determine $TERM\n");
		generalcleanup(1);
	}
#endif

	/* find appropriate functions to use based on terminal type */
	numtypes = sizeof(Config) / sizeof(struct CONFIG);
	for (c_p = Config; numtypes > 0; c_p++, numtypes--) {
		if (strcmp(c_p->termname, termname) == 0) {
			Conf_info_p = c_p;
			break;
		}
#ifdef XWINDOW
		/* save the xwindow config. If we don't find a
		 * matching terminal type here, we're try some other
		 * tricks later to guess if we're running under X */
		if (strcmp(c_p->termname, "xterm") == 0) {
			xwindow_conf_p = c_p;
		}
#endif
	}

#ifdef XWINDOW
	if (Conf_info_p == (struct CONFIG *) 0) {
		/* There can be several variations on xterm, so
		 * if $TERM at least starts with xterm, consider that
		 * good enough to try. And to try even harder to
		 * recognize if we're probably running under X, and
		 * thus the 'xterm' type will probably work, check if
		 * $DISPLAY is set. Chances are, if it is, we're probably
		 * in X. If it turns out we're not, we'll fail eventually,
		 * but we will have at least tried pretty hard
		 * to find something that would work... */
		if (strncmp(termname, "xterm", 5) == 0 ||
				getenv("DISPLAY") != (char *) 0) {
			Conf_info_p = xwindow_conf_p;
		}
	}
#endif

	/* Make sure we managed to find a $TERM we can work with */
	if (Conf_info_p == (struct CONFIG *) 0 ) {
		fprintf(stderr, "$TERM type not supported\n");
		generalcleanup(1);
	}

#ifdef XWINDOW
	/* X has some extra options, so handle them */
	if (strcmp(Conf_info_p->termname, "xterm") == 0) {
		parse_X_options();
	}
#endif
}