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Re: Plotting in Octave
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From: |
Ludger Kunz |
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Subject: |
Re: Plotting in Octave |
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Date: |
Wed, 20 Jul 94 16:57:51 +0200 |
Hi,
here is my linux-svgalib driver i am using with gnuplot. I
hope it is the one you are looking for.
Ludger Kunz
----------------snip------------------------------------
/* GNUPLOT - linux.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:
* SVGA 1024x768x256 for PC's running the Linux Operating System
* (also VGA 640x480x16, and SVGA 800x600x256)
*
* AUTHOR
* Scott Heavner (address@hidden)
* based on original linux.trm by Tommy Frandsen (address@hidden)
*
* send your comments or suggestions to (address@hidden).
*
*/
/* If SVGALIB is defined, it will compile with the Linux SVGAlib
* mainatained by Harm Hanemaayer (address@hidden). SVGAlib 0.6
* supports Tridents, Tseng, Cirrus, Oak (?), and generic vga.
*
* If SVGALIB is not defined, it will attempt to use the trident
* tvgalib address@hidden
*/
#undef LINUX_SVGALIB
#define LINUX_SVGALIB
#define _STRING_H_
#ifdef LINUX_SVGALIB
#include <vga.h>
#else
#include "/term/new/tvgalib/src/tvga.h"
#define VGA 1
int vga_setchipset(x)
int x;
{
return 0;
}
int vga_hasmode(x)
int x;
{
if (vga_setmode(x)) {
vga_setmode(TEXT);
return 1;
}
return 0;
}
#endif
#define LINUX_XMAX 1024
#define LINUX_YMAX 768
#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;
int startx, starty;
int linux_angle;
static int linux_vmode=G1024x768x256;
static int linux_xlast=LINUX_XLAST;
static int linux_ylast=LINUX_YLAST;
static int vgacolor[] = {7,8,2,3,4,5,9,14,12,15,13,10,11,1,6};
LINUX_options( )
{
#ifdef LINUX_SVGLIB
if (!END_OF_COMMAND) {
if (almost_equals(c_token,"T$VGA8900")||
almost_equals(c_token,"t$vga8900")) {
vga_setchipset(TVGA8900);
c_token++;
}
else if (almost_equals(c_token,"E$T4000")||
almost_equals(c_token,"e$t4000")) {
vga_setchipset(ET4000);
c_token++;
}
else if (almost_equals(c_token,"O$AK")||
almost_equals(c_token,"o$ak")) {
vga_setchipset(OAK);
c_token++;
}
else if (almost_equals(c_token,"C$IRRUS")||
almost_equals(c_token,"c$irrus")) {
vga_setchipset(CIRRUS);
c_token++;
}
}
#endif
if (!END_OF_COMMAND) {
if (almost_equals(c_token,"v$ga")||
almost_equals(c_token,"V$GA")) {
vga_setchipset(VGA);
linux_vmode = G640x480x16;
c_token++;
}
else if (almost_equals(c_token,"s$vga")||
almost_equals(c_token,"S$VGA")) {
vga_setchipset(UNDEFINED);
if ( vga_hasmode(G1024x768x256) ) {
linux_vmode = G1024x768x256;
term_tbl[term].xmax = 1024;
term_tbl[term].ymax = 768;
linux_xlast = 1023;
linux_ylast = 767;
}
else {
printf("Cannot use 1024x768 mode, using
640x480x16\n");
linux_vmode = G640x480x16;
}
c_token++;
}
else if (almost_equals(c_token,"s8$00")||
almost_equals(c_token,"S8$00")) {
vga_setchipset(UNDEFINED);
if ( vga_hasmode(G800x600x256) ) {
linux_vmode = G800x600x256;
term_tbl[term].xmax = 800;
term_tbl[term].ymax = 600;
linux_xlast = 799;
linux_ylast = 599;
}
else {
printf("Cannot use 800x600 mode, using
640x480x16\n");
linux_vmode = G640x480x16;
}
c_token++;
}
/******** SVGALIB doesn't support 16 color modes (yet?)
else if (almost_equals(c_token,"s81$6")||
almost_equals(c_token,"S81$6")) {
vga_setchipset(UNDEFINED);
if ( vga_hasmode(G800x600x256) ) {
linux_vmode = G800x600x256;
term_tbl[term].xmax = 800;
term_tbl[term].ymax = 600;
linux_xlast = 799;
linux_ylast = 599;
}
else {
printf("Cannot use 800x600 mode, using
640x480x16\n");
linux_vmode = G640x480x16;
}
c_token++;
}
***************************************************************************/
}
if ( linux_vmode == G640x480x16 ) {
term_tbl[term].xmax = 640;
term_tbl[term].ymax = 480;
linux_xlast = 639;
linux_ylast = 479;
}
sprintf(term_options,"%s" ,
( linux_vmode == G1024x768x256 ) ? "svga" : (
( linux_vmode == G800x600x256) ? "800x600x256" : (
( linux_vmode == G320x240x256) ? "800x600x16" :"vga" )
) );
}
LINUX_text()
{
int c;
if (graphics_on) {
graphics_on = FALSE;
vga_getch();
}
vga_setmode(TEXT);
}
LINUX_reset()
{
vga_setmode(TEXT);
}
LINUX_putc(x,y,c,ang,line_func)
unsigned int x,y;
char c;
int ang;
FUNC_PTR line_func;
{
int i, j, k;
unsigned int pixelon;
i = (int)(c) - 32;
for (j=0; j<FNT5X9_VBITS; j++) {
for (k=0; k<FNT5X9_HBITS; k++) {
pixelon = (((unsigned int)(fnt5x9[i][j])) >> k & 1);
if (pixelon) {
switch(ang) {
case 0 :
(*line_func)(x+k+1,y-j,x+k+1,y-j);
break;
case 1 :
(*line_func)(x-j,y-k-1,x-j,y-k-1);
break;
}
}
}
}
}
int LINUX_text_angle(ang)
int ang;
{
linux_angle=ang;
return TRUE;
}
LINUX_init()
{
if ( ! vga_hasmode(linux_vmode) ) {
linux_vmode == G640x480x16;
if ( ! vga_hasmode(linux_vmode) ) {
printf("Error, cannot find any valid display modes.\n");
return 1;
}
term_tbl[term].xmax = 640;
term_tbl[term].ymax = 480;
linux_xlast = 639;
linux_ylast = 479;
}
}
LINUX_graphics()
{
graphics_on = TRUE;
vga_setmode(linux_vmode);
}
LINUX_linetype(linetype)
{
if (linetype >= 13)
linetype %= 13;
vga_setcolor(vgacolor[linetype+2]);
}
LINUX_move(x,y)
{
startx = x;
starty = y;
}
LINUX_vector(x,y)
{
vga_drawline(startx,linux_ylast-starty,x,linux_ylast-y);
startx = x;
starty = y;
}
LINUX_put_text(x,y,str)
unsigned int x, y;
char *str;
{
int i;
switch(linux_angle) {
case 0 : y -= LINUX_VCHAR/2;
break;
case 1 : x += LINUX_VCHAR/2;
break;
}
for (i=0;str[i];i++) {
LINUX_putc(x,linux_ylast-y,str[i],linux_angle,vga_drawline);
switch(linux_angle) {
case 0 : x+=LINUX_HCHAR ;
break;
case 1 : y+=LINUX_HCHAR ;
break;
}
}
}
--
Ludger Kunz | ____________|Tel.: 02371/566-230
FernUniversitaet Hagen| /| / / \ |FAX: 02371/52212
Lehrgebiet ES | / |/ /_ \ |EMAIL:
Frauenstuhlweg 31 | / |\ / \ |address@hidden
58644 Iserlohn |/___|_\/_______\|