/* GNUPLOT - linux.trm */
/*
 * Copyright (C) 1990
 *
 * Permission to use, copy, and distribute this software and its
 * documentation for any purpose with or without fee is hereby granted, 
 * provided that the above copyright notice appear in all copies and 
 * that both that copyright notice and this permission notice appear 
 * in supporting documentation.
 *
 * Permission to modify the software is granted, but not the right to
 * distribute the modified code.  Modifications are to be distributed 
 * as patches to released version.
 *
 * This software  is provided "as is" without express or implied warranty.
 *
 * This file is included by ../term.c.
 *
 * This terminal driver supports:
 *  VGA 640x480x16 for PC's running the Linux Operating System 
 *
 * AUTHOR
 *  Tommy Frandsen (frandsen@diku.dk)  - original
 *  div - (D.R.Denholm@southampton.ac.uk)
 *      - modified to spawn a process to run the privilege'd part
 *        of the code (ie the vga graphics). Send commands along
 *        a pipe using the Xlib protocol (more or less...)
 *
 * send your comments or suggestions to (pixar!info-gnuplot@sun.com).
 *
 */

#include <stdio.h>   /* div - for popen */

#define LINUX_XMAX 640
#define LINUX_YMAX 480

#define LINUX_XLAST (LINUX_XMAX - 1)
#define LINUX_YLAST (LINUX_YMAX - 1)

#define LINUX_VCHAR FNT5X9_VCHAR
#define LINUX_HCHAR FNT5X9_HCHAR

#define LINUX_VTIC 5
#define LINUX_HTIC 5

static int graphics_on = FALSE;

static int vgacolor[] = {7,8,2,3,4,5,9,14,12,15,13,10,11,1,6};

static FILE *linux_pipe=NULL;  /* div */

LINUX_text()
{
	int c;

	if (graphics_on) {
		graphics_on = FALSE;
		fflush(linux_pipe);
		getchar();  /* could do better than this..? */
	}
	fputs("E\n", linux_pipe); fflush(linux_pipe);
}


LINUX_reset()
{
	fputs("R\n", linux_pipe);
	fflush(linux_pipe);
	pclose(linux_pipe);
}

int LINUX_text_angle(ang)
int ang;
{
	fprintf(linux_pipe, "A%4d\n", ang);
	return TRUE;
}


LINUX_init()
{
	linux_pipe = popen("gnuplot_linux", "w");
}


LINUX_graphics()
{
	graphics_on = TRUE;
	fprintf(linux_pipe, "G\nP7%04d%04d\n",
		term_tbl[term].h_tic/2, term_tbl[term].v_tic/2);

}


LINUX_linetype(linetype)
{
	if (linetype >= 13)
		linetype %= 13;
	fprintf(linux_pipe, "L%04d\n", linetype);
}

LINUX_move(x,y)
{
	fprintf(linux_pipe, "M%04d%04d\n", x, y);
}


LINUX_vector(x,y)
{
	fprintf(linux_pipe, "V%04d%04d\n", x, y);
}


LINUX_put_text(x,y,str)
unsigned int x, y;
char *str;
{
	fprintf(linux_pipe, "T%04d%04d%s\n", x, y,str);
}