Linux Cubed Series 4: GNU Archives/Linux Cubed Series 4 - GNU Archives.iso/gnu/gnuplot-.5/gnuplot-/gnuplot/term/emxvga.trm

Text File | 1993-05-12 | 4.2 KB | 234 lines

/* GNUPLOT - emxvga.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:
 *  vgal
 *  vesa
 *
 * AUTHORS
 *  Russell Lang
 *
 * send your comments or suggestions to ([e-mail]).
 *
 */

/* VGA driver using EMX/GCC for DOS */
#include <graph.h>
#include <conio.h>
#include <dos.h>

int emx_startx, emx_starty;
int emx_xlast, emx_ylast;
int emx_color;
int emx_angle;
int emx_vmode = 0;
#ifdef EMXVESA
int emx_vesamode = G640x480x256;
#endif

#define EMXVGA_XMAX 640
#define EMXVGA_YMAX 480

#define EMXVGA_XLAST (EMXVGA_XMAX - 1)
#define EMXVGA_YLAST (EMXVGA_YMAX - 1)

#define EMXVGA_VCHAR FNT5X9_VCHAR
#define EMXVGA_HCHAR FNT5X9_HCHAR
#define EMXVGA_VTIC 4
#define EMXVGA_HTIC 4

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


EMXVGA_init()
{
union REGS r;
    r.h.ah = 0x0f;
    _int86(0x10, &r, &r);
    emx_vmode = r.h.al;    /* save old video mode */
    /* Get the screen size: */
    if (!g_mode(G_MODE_VGA_L))
        int_error("Couldn't select graphics mode",NO_CARET);
    emx_xlast = g_xsize - 1;
        term_tbl[term].xmax = emx_xlast + 1;
    emx_ylast = g_ysize - 1;
        term_tbl[term].ymax = emx_ylast + 1;
    g_mode(G_MODE_OFF);
}

EMXVGA_graphics()
{
/* don't use g_mode() here - gmode(G_MODE_OFF) doesn't clean up */
union REGS r;
    r.h.ah = 0x00;
    r.h.al = 19;        /* VGA 320x200x256 mode */
    _int86(0x10, &r, &r);
}

EMXVGA_text()
{
/* don't use g_mode() here - gmode(G_MODE_OFF) doesn't clean up */
union REGS r;
int ch;
    ch = getch();
    r.h.ah = 0x00;
    r.h.al = emx_vmode;    /* old video mode */
    _int86(0x10, &r, &r);
    if (ch == 3)
        int_error("Interrupt",NO_CARET);
}

EMXVGA_reset()
{
}

#ifdef EMXVESA
/* untested */
EMXVESA_options()
{
    extern struct value *const_express();
    extern double real();

    if (!END_OF_COMMAND) {
        if (almost_equals(c_token,"d$efault")) {
            emx_vesamode = G640x480x256;
            c_token++;
        }
    }

    if (!END_OF_COMMAND) {
        /* We have a vesa mode specified */
        struct value a;
        emx_vesamode = (int)real(const_express(&a));
    }

    sprintf(term_options,"%d",emx_vesamode);
}

EMXVESA_init()
{
    if (!g_mode(emx_vesamode))
        int_error("Couldn't select graphics mode",NO_CARET);
    emx_xlast = g_xsize - 1;
        term_tbl[term].xmax = emx_xlast + 1;
    emx_ylast = g_ysize - 1;
        term_tbl[term].ymax = emx_ylast + 1;
    g_mode(GTEXT);
}

EMXVESA_graphics()
{
    g_mode(emx_vesamode);
}

EMXVESA_text()
{
int ch;
    ch = getch();
    g_mode(GTEXT);
    if (ch == 3)
        int_error("Interrupt",NO_CARET);
}

EMXVESA_reset()
{
}
#endif


EMXVGA_linetype(linetype)
int linetype;
{
    if (linetype >= 13)
        linetype %= 13;
    emx_color = emx_colors[linetype+2];
}

EMXVGA_move(x,y)
unsigned int x,y;
{
    emx_startx = x;
    emx_starty = y;
}


EMXVGA_vector(x,y)
unsigned int x,y;
{
    g_line(emx_startx,emx_ylast-emx_starty,x,emx_ylast-y,emx_color);
    emx_startx = x;
    emx_starty = y;
}


int EMXVGA_text_angle(ang)
int ang;
{
    emx_angle=ang;
    return TRUE;
}


EMXVGA_putc(x,y,c,angle)
unsigned int x,y;
char c;
int angle;
{
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(angle) {
                    case 0 : g_set(x+k,y-j,emx_color);
                            break;
                    case 1 : g_set(x-j,y-k,emx_color);
                            break;
                }
            }
        }
    }
}


EMXVGA_put_text(x,y,str)
unsigned int x, y;
char *str;
{
int i;
    switch(emx_angle) {
        case 0 : y -= EMXVGA_VCHAR/2;
                break;
        case 1 : x += EMXVGA_VCHAR/2;
                break;
    }
    for (i=0;str[i];i++) {
        EMXVGA_putc(x,emx_ylast-y,str[i],emx_angle);
        switch(emx_angle) {
            case 0 : x+=EMXVGA_HCHAR ;
                    break;
            case 1 : y+=EMXVGA_HCHAR ;
                    break;
        }
    }
}