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TeX 1995 July
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TeX CD-ROM July 1995 (Disc 1)(Walnut Creek)(1995).ISO
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graphics
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gnuplot
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term
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gnugraph.trm
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1993-09-15
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/* GNUPLOT -- gnugraph.trm */
/*
* Copyright (C) 1993
*
* 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:
* GNU plot(5) graphics language
*
* AUTHORS
* Tony Richardson from the unixplot.trm by Colin Kelley, Thomas Williams,
* and Russell Lang and from post.trm by Russell Lang.
*
* send your comments or suggestions to (info-gnuplot@ames.arc.nasa.gov).
*
* This version of the 'unixplot' driver produces device independent
* output. I've chosen parameter values so that the PostScript output
* produced by plot2ps is 5" x 3". You can use the 'set size' command
* to get output up to 8.25" x 8.25", i.e. size values larger than
* 1 are okay.
*/
/*
Unixplot library writes to stdout. A fix was put in place by
..!arizona!naucse!jdc to let set term and set output redirect
stdout. All other terminals write to outfile.
*/
/* This is a device independent format, so the output should look
* look "reasonable" on any output device. I set things up there so
* that the output of plot2ps is 5" x 3" (standard GNUPLOT size).
* You can use GNUPLOT's size command to obtain plots to almost the
* 8.25" x 8.25" limit.
*/
char up_font[MAX_ID_LEN+1] = "Courier" ; /* name of font */
int up_fontsize = 10;
/* plot2ps produces a 8.25" x 8.25" square. */
#define UP_SCREENX 32768
#define UP_SCREENY 32768
#define UP_SCRXINC 8.25
#define UP_SCRYINC 8.25
/* We want a 5" x 3" graph by default. */
#define UP_XINCHES 5
#define UP_YINCHES 3
/* UP_XMAX = (UP_SCREENX*UP_XINCHES)/UP_SCRXINC
UP_YMAX (UP_SCREENY*UP_YINCHES)/UP_SCRYINC */
#define UP_XMAX 19859
#define UP_YMAX 11565
#define UP_XLAST (UP_XMAX - 1)
#define UP_YLAST (UP_YMAX - 1)
/* UP_VCHAR = ((UP_FONTSIZE*UP_YMAX)/(UP_YINCHES*72))
= UP_FONTSIZE*UP_VFONTSC
UP_HCHAR = ((UP_FONTSIZE/2)*UP_XMAX)/(UP_XINCHES*72))
= UP_FONTSIZE*UP_HFONTSC
*/
#define UP_VFONTSC 53.5
#define UP_VCHAR 535 /* 10 * VFONTSC */
#define UP_HFONTSC 27.6
#define UP_HCHAR 276 /* 10 * HFONTSC */
#define UP_VTIC (UP_YMAX/80)
#define UP_HTIC (UP_XMAX/80)
/* These offsets center plot2ps output in the middle of the page. The
* amount of resizing that can be done is limited. */
/*
* #define UP_XOFF 6454
* #define UP_YOFF 10601
*/
/* These offsets give a 1" offset from the lower left corner. This
* gives a greater range of permissible values in GNUPLOT's size
* command. */
#define UP_XOFF 3972
#define UP_YOFF 3972
enum JUSTIFY up_justify=LEFT;
UP_options()
{
extern struct value *const_express();
extern double real();
if(!END_OF_COMMAND) {
if(almost_equals(c_token,"d$efault")) {
strcpy(up_font,"Courier");
up_fontsize = 10;
term_tbl[term].v_char = (unsigned int)(up_fontsize*UP_VFONTSC);
term_tbl[term].h_char = (unsigned int)(up_fontsize*UP_HFONTSC);
c_token++;
}
}
if (!END_OF_COMMAND && isstring(c_token)) {
quote_str(up_font,c_token);
c_token++;
}
if (!END_OF_COMMAND) {
/* We have font size specified */
struct value a;
up_fontsize = (int)real(const_express(&a));
term_tbl[term].v_char = (unsigned int)(up_fontsize*UP_VFONTSC);
term_tbl[term].h_char = (unsigned int)(up_fontsize*UP_HFONTSC);
}
sprintf(term_options,"\"%s\" %d",up_font,up_fontsize);
}
UP_init()
{
openpl();
space(0,0,UP_SCREENX-1,UP_SCREENY-1);
fontname(up_font);
fontsize(up_fontsize);
}
UP_graphics()
{
erase();
}
UP_text()
{
/* Flush here so that output will be complete. */
fflush(stdout);
}
UP_linetype(linetype)
int linetype;
{
static char *lt[2+5] = {"solid", "longdashed", "solid", "dotted","shortdashed",
"dotdashed", "longdashed"};
if (linetype >= 5)
linetype %= 5;
linemod(lt[linetype+2]);
}
UP_move(x,y)
unsigned int x,y;
{
move(x+UP_XOFF,y+UP_YOFF);
}
UP_vector(x,y)
unsigned int x,y;
{
cont(x+UP_XOFF,y+UP_YOFF);
}
UP_put_text(x,y,str)
unsigned int x,y;
char str[];
{
UP_move(x,y); /* Don't adjust x and y! It's done in UP_move. */
switch(up_justify) {
case LEFT:
alabel('l','c',str);
break;
case CENTRE:
alabel('c','c',str);
break;
case RIGHT:
alabel('r','c',str);
break;
}
}
UP_text_angle(ang)
int ang;
{
rotate(0,0,90*ang);
return TRUE;
}
UP_justify_text(mode)
enum JUSTIFY mode;
{
up_justify=mode;
return TRUE;
}
UP_reset()
{
closepl();
}