| 1 |
#ifndef lint
|
| 2 |
static const char RCSid[] = "$Id: vgaimage.c,v 2.11 2004/01/02 12:47:01 schorsch Exp $";
|
| 3 |
#endif
|
| 4 |
/*
|
| 5 |
* vgaimage.c - driver for VGA board under DOS
|
| 6 |
*/
|
| 7 |
|
| 8 |
#include <stdio.h>
|
| 9 |
|
| 10 |
#include "standard.h"
|
| 11 |
#include <graph.h>
|
| 12 |
#include "color.h"
|
| 13 |
#include "random.h"
|
| 14 |
#include "resolu.h"
|
| 15 |
#include <dos.h>
|
| 16 |
#include <i86.h>
|
| 17 |
|
| 18 |
#define M_RDOWN 0x8
|
| 19 |
#define M_RUP 0x10
|
| 20 |
#define M_LDOWN 0x2
|
| 21 |
#define M_LUP 0x4
|
| 22 |
#define M_MOTION 0x1
|
| 23 |
|
| 24 |
int crad;
|
| 25 |
int mouse_event = 0;
|
| 26 |
int mouse_xpos = -1;
|
| 27 |
int mouse_ypos = -1;
|
| 28 |
|
| 29 |
#define hide_cursor() move_cursor(-1,-1)
|
| 30 |
#define show_cursor() move_cursor(mouse_xpos,mouse_ypos)
|
| 31 |
|
| 32 |
#define CTRL(c) ((c)-'@')
|
| 33 |
|
| 34 |
#define MAXWIDTH 1024
|
| 35 |
#define MAXHEIGHT 768
|
| 36 |
|
| 37 |
short ourblack = 0; ourwhite = 1;
|
| 38 |
|
| 39 |
double gamcor = 2.2; /* gamma correction */
|
| 40 |
|
| 41 |
int dither = 1; /* dither colors? */
|
| 42 |
|
| 43 |
int maxcolors = 0; /* maximum colors */
|
| 44 |
int minpix = 0; /* minimum pixel value */
|
| 45 |
int greyscale = 0; /* in grey */
|
| 46 |
|
| 47 |
int scale = 0; /* scalefactor; power of two */
|
| 48 |
|
| 49 |
COLR scanline[MAXWIDTH]; /* scan line buffer */
|
| 50 |
|
| 51 |
int xmax, ymax; /* picture dimensions */
|
| 52 |
FILE *fin = stdin; /* input file */
|
| 53 |
long scanpos[MAXHEIGHT]; /* scan line positions in file */
|
| 54 |
int cury = 0; /* current scan location */
|
| 55 |
|
| 56 |
double exposure = 1.0; /* exposure compensation used */
|
| 57 |
|
| 58 |
int wrongformat = 0; /* input in another format? */
|
| 59 |
|
| 60 |
struct {
|
| 61 |
int xmin, ymin, xsiz, ysiz;
|
| 62 |
} box = {0, 0, 0, 0}; /* current box */
|
| 63 |
|
| 64 |
int initialized = 0;
|
| 65 |
int cheight, cwidth;
|
| 66 |
|
| 67 |
#define postext(x,y) _settextposition(1+(y)/cheight,1+(x)/cwidth)
|
| 68 |
|
| 69 |
char *progname;
|
| 70 |
|
| 71 |
char errmsg[128];
|
| 72 |
|
| 73 |
extern BYTE clrtab[256][3]; /* global color map */
|
| 74 |
|
| 75 |
static gethfunc headline;
|
| 76 |
|
| 77 |
|
| 78 |
main(argc, argv)
|
| 79 |
int argc;
|
| 80 |
char *argv[];
|
| 81 |
{
|
| 82 |
extern char *getenv(), *fixargv0();
|
| 83 |
char *gv;
|
| 84 |
int i;
|
| 85 |
|
| 86 |
progname = argv[0] = fixargv0(argv[0]);
|
| 87 |
if ((gv = getenv("DISPLAY_GAMMA")) != NULL)
|
| 88 |
gamcor = atof(gv);
|
| 89 |
|
| 90 |
for (i = 1; i < argc; i++)
|
| 91 |
if (argv[i][0] == '-')
|
| 92 |
switch (argv[i][1]) {
|
| 93 |
case 'c':
|
| 94 |
maxcolors = atoi(argv[++i]);
|
| 95 |
break;
|
| 96 |
case 'b':
|
| 97 |
greyscale = !greyscale;
|
| 98 |
break;
|
| 99 |
case 'm':
|
| 100 |
maxcolors = 2;
|
| 101 |
break;
|
| 102 |
case 'd':
|
| 103 |
dither = !dither;
|
| 104 |
break;
|
| 105 |
case 'e':
|
| 106 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
|
| 107 |
goto userr;
|
| 108 |
scale = atoi(argv[++i]);
|
| 109 |
break;
|
| 110 |
case 'g':
|
| 111 |
gamcor = atof(argv[++i]);
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| 112 |
break;
|
| 113 |
default:
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| 114 |
goto userr;
|
| 115 |
}
|
| 116 |
else
|
| 117 |
break;
|
| 118 |
|
| 119 |
if (i == argc-1) { /* open picture */
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| 120 |
fin = fopen(argv[i], "r");
|
| 121 |
if (fin == NULL) {
|
| 122 |
sprintf(errmsg, "cannot open file \"%s\"", argv[i]);
|
| 123 |
quiterr(errmsg);
|
| 124 |
}
|
| 125 |
} else if (i != argc)
|
| 126 |
goto userr;
|
| 127 |
setmode(fileno(fin), O_BINARY);
|
| 128 |
/* get header */
|
| 129 |
getheader(fin, headline, NULL);
|
| 130 |
/* get picture dimensions */
|
| 131 |
if (wrongformat || fgetresolu(&xmax, &ymax, fin) < 0)
|
| 132 |
quiterr("bad picture format");
|
| 133 |
if (xmax > MAXWIDTH | ymax > MAXHEIGHT)
|
| 134 |
quiterr("input picture too large for VGA");
|
| 135 |
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| 136 |
init(); /* initialize and display */
|
| 137 |
|
| 138 |
while (docommand()) /* loop on command */
|
| 139 |
;
|
| 140 |
quiterr(NULL);
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| 141 |
userr:
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| 142 |
fprintf(stderr,
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| 143 |
"Usage: %s [-b][-m][-d][-c ncolors][-e +/-stops] file\n", progname);
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| 144 |
exit(1);
|
| 145 |
}
|
| 146 |
|
| 147 |
|
| 148 |
static int
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| 149 |
headline( /* get relevant info from header */
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| 150 |
char *s,
|
| 151 |
void *p
|
| 152 |
)
|
| 153 |
{
|
| 154 |
char fmt[32];
|
| 155 |
|
| 156 |
if (isexpos(s))
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| 157 |
exposure *= exposval(s);
|
| 158 |
else if (isformat(s)) {
|
| 159 |
formatval(fmt, s);
|
| 160 |
wrongformat = strcmp(fmt, COLRFMT);
|
| 161 |
}
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| 162 |
return(0);
|
| 163 |
}
|
| 164 |
|
| 165 |
|
| 166 |
init() /* initialize and load display */
|
| 167 |
{
|
| 168 |
static struct {
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| 169 |
short mode;
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| 170 |
short xsiz, ysiz;
|
| 171 |
} video[] = {
|
| 172 |
{_MRES256COLOR, 320, 200},
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| 173 |
{_VRES256COLOR, 640, 480},
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| 174 |
{_SVRES256COLOR, 800, 600},
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| 175 |
{_XRES256COLOR, 1024, 768},
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| 176 |
{-1, 0, 0}
|
| 177 |
};
|
| 178 |
struct videoconfig config;
|
| 179 |
register int i;
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| 180 |
/* pick a card... */
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| 181 |
for (i = 0; video[i].mode != -1; i++)
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| 182 |
if (video[i].xsiz >= xmax && video[i].ysiz >= ymax)
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| 183 |
break;
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| 184 |
if (video[i].mode == -1)
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| 185 |
quiterr("input picture too large");
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| 186 |
if (_setvideomode(video[i].mode) == 0)
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| 187 |
quiterr("inadequate display card for picture");
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| 188 |
ms_init();
|
| 189 |
initialized = 1;
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| 190 |
_getvideoconfig(&config);
|
| 191 |
if (maxcolors == 0 | maxcolors > config.numcolors)
|
| 192 |
maxcolors = config.numcolors-2;
|
| 193 |
if (maxcolors <= config.numcolors-2)
|
| 194 |
minpix = 2;
|
| 195 |
else
|
| 196 |
ourwhite = maxcolors-1;
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| 197 |
_settextcolor(ourwhite);
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| 198 |
cheight = config.numypixels/config.numtextrows;
|
| 199 |
cwidth = config.numxpixels/config.numtextcols;
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| 200 |
/* clear scan position array */
|
| 201 |
for (i = 0; i < ymax; i++)
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| 202 |
scanpos[i] = -1;
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| 203 |
/* display image */
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| 204 |
if (greyscale)
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| 205 |
greyimage();
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| 206 |
else
|
| 207 |
mappedimage();
|
| 208 |
}
|
| 209 |
|
| 210 |
|
| 211 |
quiterr(err) /* print message and exit */
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| 212 |
char *err;
|
| 213 |
{
|
| 214 |
if (initialized) {
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| 215 |
ms_done();
|
| 216 |
_setvideomode(_DEFAULTMODE);
|
| 217 |
}
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| 218 |
if (err != NULL) {
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| 219 |
fprintf(stderr, "%s: %s\n", progname, err);
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| 220 |
exit(1);
|
| 221 |
}
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| 222 |
exit(0);
|
| 223 |
}
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| 224 |
|
| 225 |
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| 226 |
int
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| 227 |
docommand() /* execute command */
|
| 228 |
{
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| 229 |
char buf[64];
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| 230 |
COLOR cval;
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| 231 |
int com;
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| 232 |
double comp;
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| 233 |
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| 234 |
while (!kbhit())
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| 235 |
watch_mouse();
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| 236 |
com = getch();
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| 237 |
switch (com) { /* interpret command */
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| 238 |
case 'q':
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| 239 |
case CTRL('Z'): /* quit */
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| 240 |
return(0);
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| 241 |
case '\n':
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| 242 |
case '\r':
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| 243 |
case 'l':
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| 244 |
case 'c': /* value */
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| 245 |
if (avgbox(cval) == -1)
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| 246 |
return(-1);
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| 247 |
switch (com) {
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| 248 |
case '\n':
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| 249 |
case '\r': /* radiance */
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| 250 |
sprintf(buf, "%.3f", intens(cval)/exposure);
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| 251 |
break;
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| 252 |
case 'l': /* luminance */
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| 253 |
sprintf(buf, "%.0fL", luminance(cval)/exposure);
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| 254 |
break;
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| 255 |
case 'c': /* color */
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| 256 |
comp = pow(2.0, (double)scale);
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| 257 |
sprintf(buf, "(%.2f,%.2f,%.2f)",
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| 258 |
colval(cval,RED)*comp,
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| 259 |
colval(cval,GRN)*comp,
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| 260 |
colval(cval,BLU)*comp);
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| 261 |
break;
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| 262 |
}
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| 263 |
postext(box.xmin+box.xsiz/2, box.ymin+box.ysiz/2);
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| 264 |
hide_cursor();
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| 265 |
_outtext(buf);
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| 266 |
show_cursor();
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| 267 |
return(1);
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| 268 |
default:
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| 269 |
return(-1);
|
| 270 |
}
|
| 271 |
}
|
| 272 |
|
| 273 |
|
| 274 |
watch_mouse() /* look after mousie */
|
| 275 |
{
|
| 276 |
int a_x, a_y, l_x, l_y;
|
| 277 |
|
| 278 |
if (mouse_event & M_MOTION)
|
| 279 |
move_cursor(mouse_xpos, mouse_ypos);
|
| 280 |
if (!(mouse_event & M_LDOWN))
|
| 281 |
return;
|
| 282 |
l_x = a_x = mouse_xpos; l_y = a_y = mouse_ypos;
|
| 283 |
hide_cursor();
|
| 284 |
revbox(a_x, a_y, l_x, l_y); /* show box */
|
| 285 |
do {
|
| 286 |
mouse_event = 0;
|
| 287 |
while (!mouse_event)
|
| 288 |
;
|
| 289 |
if (mouse_event & M_MOTION) {
|
| 290 |
revbox(a_x, a_y, l_x, l_y);
|
| 291 |
revbox(a_x, a_y, l_x=mouse_xpos, l_y=mouse_ypos);
|
| 292 |
}
|
| 293 |
} while (!(mouse_event & M_LUP));
|
| 294 |
revbox(a_x, a_y, l_x, l_y); /* hide box */
|
| 295 |
show_cursor();
|
| 296 |
box.xmin = mouse_xpos;
|
| 297 |
box.ymin = mouse_ypos;
|
| 298 |
if (box.xmin > a_x) {
|
| 299 |
box.xsiz = box.xmin - a_x + 1;
|
| 300 |
box.xmin = a_x;
|
| 301 |
} else {
|
| 302 |
box.xsiz = a_x - box.xmin + 1;
|
| 303 |
}
|
| 304 |
if (box.ymin > a_y) {
|
| 305 |
box.ysiz = box.ymin - a_y + 1;
|
| 306 |
box.ymin = a_y;
|
| 307 |
} else {
|
| 308 |
box.ysiz = a_y - box.ymin + 1;
|
| 309 |
}
|
| 310 |
mouse_event = 0;
|
| 311 |
}
|
| 312 |
|
| 313 |
|
| 314 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */
|
| 315 |
int x0, y0, x1, y1;
|
| 316 |
{
|
| 317 |
_setplotaction(_GXOR);
|
| 318 |
_setcolor(255);
|
| 319 |
_moveto(x0, y0);
|
| 320 |
_lineto(x1, y0);
|
| 321 |
_lineto(x1, y1);
|
| 322 |
_lineto(x0, y1);
|
| 323 |
_lineto(x0, y0);
|
| 324 |
}
|
| 325 |
|
| 326 |
|
| 327 |
int
|
| 328 |
avgbox(clr) /* average color over current box */
|
| 329 |
COLOR clr;
|
| 330 |
{
|
| 331 |
static COLOR lc;
|
| 332 |
static int ll, lr, lt, lb;
|
| 333 |
int left, right, top, bottom;
|
| 334 |
int y;
|
| 335 |
double d;
|
| 336 |
COLOR ctmp;
|
| 337 |
register int x;
|
| 338 |
|
| 339 |
setcolor(clr, 0.0, 0.0, 0.0);
|
| 340 |
left = box.xmin;
|
| 341 |
right = left + box.xsiz;
|
| 342 |
if (left < 0)
|
| 343 |
left = 0;
|
| 344 |
if (right > xmax)
|
| 345 |
right = xmax;
|
| 346 |
if (left >= right)
|
| 347 |
return(-1);
|
| 348 |
top = box.ymin;
|
| 349 |
bottom = top + box.ysiz;
|
| 350 |
if (top < 0)
|
| 351 |
top = 0;
|
| 352 |
if (bottom > ymax)
|
| 353 |
bottom = ymax;
|
| 354 |
if (top >= bottom)
|
| 355 |
return(-1);
|
| 356 |
if (left == ll && right == lr && top == lt && bottom == lb) {
|
| 357 |
copycolor(clr, lc);
|
| 358 |
return(0);
|
| 359 |
}
|
| 360 |
for (y = top; y < bottom; y++) {
|
| 361 |
if (getscan(y) == -1)
|
| 362 |
return(-1);
|
| 363 |
for (x = left; x < right; x++) {
|
| 364 |
colr_color(ctmp, scanline[x]);
|
| 365 |
addcolor(clr, ctmp);
|
| 366 |
}
|
| 367 |
}
|
| 368 |
d = 1.0/((right-left)*(bottom-top));
|
| 369 |
scalecolor(clr, d);
|
| 370 |
ll = left; lr = right; lt = top; lb = bottom;
|
| 371 |
copycolor(lc, clr);
|
| 372 |
return(0);
|
| 373 |
}
|
| 374 |
|
| 375 |
|
| 376 |
setpalette() /* set our palette using clrtab */
|
| 377 |
{
|
| 378 |
long cvals[256];
|
| 379 |
register int i;
|
| 380 |
|
| 381 |
cvals[ourblack] = _BLACK;
|
| 382 |
cvals[ourwhite] = _BRIGHTWHITE;
|
| 383 |
for (i = 0; i < maxcolors; i++)
|
| 384 |
cvals[i+minpix] = (long)clrtab[i][BLU]<<14 & 0x3f0000L |
|
| 385 |
clrtab[i][GRN]<<6 & 0x3f00 |
|
| 386 |
clrtab[i][RED]>>2;
|
| 387 |
_remapallpalette(cvals);
|
| 388 |
}
|
| 389 |
|
| 390 |
|
| 391 |
greyimage() /* display greyscale image */
|
| 392 |
{
|
| 393 |
short thiscolor, lastcolor = -1;
|
| 394 |
int y;
|
| 395 |
register int x;
|
| 396 |
/* set gamma correction */
|
| 397 |
setcolrgam(gamcor);
|
| 398 |
/* set up color map */
|
| 399 |
for (x = 0; x < maxcolors; x++)
|
| 400 |
clrtab[x][RED] = clrtab[x][GRN] = clrtab[x][BLU] =
|
| 401 |
((long)x*256 + 128)/maxcolors;
|
| 402 |
setpalette();
|
| 403 |
_setplotaction(_GPSET);
|
| 404 |
/* read and display file */
|
| 405 |
for (y = 0; y < ymax; y++) {
|
| 406 |
getscan(y);
|
| 407 |
if (scale)
|
| 408 |
shiftcolrs(scanline, xmax, scale);
|
| 409 |
for (x = 0; x < xmax; x++)
|
| 410 |
scanline[x][GRN] = normbright(scanline[x]);
|
| 411 |
colrs_gambs(scanline, xmax);
|
| 412 |
if (maxcolors < 256)
|
| 413 |
for (x = 0; x < xmax; x++) {
|
| 414 |
thiscolor = ((long)scanline[x][GRN] *
|
| 415 |
maxcolors + maxcolors/2) / 256;
|
| 416 |
if (thiscolor != lastcolor)
|
| 417 |
_setcolor((lastcolor=thiscolor)+minpix);
|
| 418 |
_setpixel(x, y);
|
| 419 |
}
|
| 420 |
else
|
| 421 |
for (x = 0; x < xmax; x++) {
|
| 422 |
thiscolor = scanline[x][GRN];
|
| 423 |
if (thiscolor != lastcolor)
|
| 424 |
_setcolor((lastcolor=thiscolor)+minpix);
|
| 425 |
_setpixel(x, y);
|
| 426 |
}
|
| 427 |
}
|
| 428 |
}
|
| 429 |
|
| 430 |
|
| 431 |
mappedimage() /* display color-mapped image */
|
| 432 |
{
|
| 433 |
BYTE bscan[MAXWIDTH];
|
| 434 |
int y;
|
| 435 |
register int x;
|
| 436 |
/* set gamma correction */
|
| 437 |
setcolrgam(gamcor);
|
| 438 |
/* make histogram */
|
| 439 |
_outtext("Quantizing image -- Please wait...");
|
| 440 |
new_histo();
|
| 441 |
for (y = 0; y < ymax; y++) {
|
| 442 |
if (getscan(y) < 0)
|
| 443 |
quiterr("seek error in getmapped");
|
| 444 |
if (scale)
|
| 445 |
shiftcolrs(scanline, xmax, scale);
|
| 446 |
colrs_gambs(scanline, xmax);
|
| 447 |
cnt_colrs(scanline, xmax);
|
| 448 |
}
|
| 449 |
/* map pixels */
|
| 450 |
if (!new_clrtab(maxcolors))
|
| 451 |
quiterr("cannot create color map");
|
| 452 |
setpalette();
|
| 453 |
_setplotaction(_GPSET);
|
| 454 |
/* display image */
|
| 455 |
for (y = 0; y < ymax; y++) {
|
| 456 |
if (getscan(y) < 0)
|
| 457 |
quiterr("seek error in getmapped");
|
| 458 |
if (scale)
|
| 459 |
shiftcolrs(scanline, xmax, scale);
|
| 460 |
colrs_gambs(scanline, xmax);
|
| 461 |
if (dither)
|
| 462 |
dith_colrs(bscan, scanline, xmax);
|
| 463 |
else
|
| 464 |
map_colrs(bscan, scanline, xmax);
|
| 465 |
for (x = 0; x < xmax; x++) {
|
| 466 |
if (x==0 || bscan[x] != bscan[x-1])
|
| 467 |
_setcolor(bscan[x]+minpix);
|
| 468 |
_setpixel(x, y);
|
| 469 |
}
|
| 470 |
}
|
| 471 |
}
|
| 472 |
|
| 473 |
|
| 474 |
getscan(y)
|
| 475 |
int y;
|
| 476 |
{
|
| 477 |
if (y != cury) {
|
| 478 |
if (scanpos[y] == -1)
|
| 479 |
return(-1);
|
| 480 |
if (fseek(fin, scanpos[y], 0) == -1)
|
| 481 |
quiterr("fseek error");
|
| 482 |
cury = y;
|
| 483 |
} else if (fin != stdin && scanpos[y] == -1)
|
| 484 |
scanpos[y] = ftell(fin);
|
| 485 |
|
| 486 |
if (freadcolrs(scanline, xmax, fin) < 0)
|
| 487 |
quiterr("picture read error");
|
| 488 |
|
| 489 |
cury++;
|
| 490 |
return(0);
|
| 491 |
}
|
| 492 |
|
| 493 |
|
| 494 |
/*
|
| 495 |
* Microsoft Mouse handling routines
|
| 496 |
*/
|
| 497 |
|
| 498 |
|
| 499 |
#pragma off (check_stack)
|
| 500 |
void _loadds far mouse_handler (int max, int mcx, int mdx)
|
| 501 |
{
|
| 502 |
#pragma aux mouse_handler parm [EAX] [ECX] [EDX]
|
| 503 |
mouse_event = max;
|
| 504 |
mouse_xpos = mcx;
|
| 505 |
mouse_ypos = mdx;
|
| 506 |
}
|
| 507 |
#pragma on (check_stack)
|
| 508 |
|
| 509 |
|
| 510 |
void
|
| 511 |
move_cursor(newx, newy) /* move cursor to new position */
|
| 512 |
int newx, newy;
|
| 513 |
{
|
| 514 |
static char *imp = NULL;
|
| 515 |
static int curx = -1, cury = -1;
|
| 516 |
#define xcmin (curx-crad<0 ? 0 : curx-crad)
|
| 517 |
#define ycmin (cury-crad<0 ? 0 : cury-crad)
|
| 518 |
#define xcmax (curx+crad>=xmax ? xmax-1 : curx+crad)
|
| 519 |
#define ycmax (cury+crad>=ymax ? ymax-1 : cury+crad)
|
| 520 |
|
| 521 |
if (newx == curx & newy == cury)
|
| 522 |
return;
|
| 523 |
if (imp == NULL &&
|
| 524 |
(imp = bmalloc(_imagesize(0,0,2*crad+1,2*crad+1))) == NULL) {
|
| 525 |
quiterr("out of memory in move_cursor");
|
| 526 |
}
|
| 527 |
if (curx >= 0 & cury >= 0) /* clear old cursor */
|
| 528 |
_putimage(xcmin, ycmin, imp, _GPSET);
|
| 529 |
/* record new position */
|
| 530 |
curx = newx; cury = newy;
|
| 531 |
if (curx < 0 | cury < 0)
|
| 532 |
return; /* no cursor */
|
| 533 |
/* save under new cursor */
|
| 534 |
_getimage(xcmin, ycmin, xcmax, ycmax, imp);
|
| 535 |
/* draw new cursor */
|
| 536 |
_setplotaction(_GPSET);
|
| 537 |
_setcolor(ourwhite);
|
| 538 |
_rectangle(_GFILLINTERIOR, xcmin, cury-1, xcmax, cury+1);
|
| 539 |
_rectangle(_GFILLINTERIOR, curx-1, ycmin, curx+1, ycmax);
|
| 540 |
_setcolor(ourblack);
|
| 541 |
_moveto(xcmin+1, cury);
|
| 542 |
_lineto(xcmax-1, cury);
|
| 543 |
_moveto(curx, ycmin+1);
|
| 544 |
_lineto(curx, ycmax-1);
|
| 545 |
#undef xcmin
|
| 546 |
#undef ycmin
|
| 547 |
#undef xcmax
|
| 548 |
#undef ycmax
|
| 549 |
}
|
| 550 |
|
| 551 |
|
| 552 |
int
|
| 553 |
ms_init()
|
| 554 |
{
|
| 555 |
struct SREGS sregs;
|
| 556 |
union REGS inregs, outregs;
|
| 557 |
int far *ptr;
|
| 558 |
int (far *function_ptr)();
|
| 559 |
|
| 560 |
segread(&sregs);
|
| 561 |
|
| 562 |
/* check for mouse driver */
|
| 563 |
|
| 564 |
inregs.w.ax = 0;
|
| 565 |
int386 (0x33, &inregs, &outregs);
|
| 566 |
if( outregs.w.ax != -1 ) {
|
| 567 |
return(0);
|
| 568 |
}
|
| 569 |
|
| 570 |
crad = ymax/40;
|
| 571 |
|
| 572 |
/* set screen limits */
|
| 573 |
|
| 574 |
inregs.w.ax = 0x7; /* horizontal resolution */
|
| 575 |
inregs.w.cx = 0;
|
| 576 |
inregs.w.dx = xmax-1;
|
| 577 |
int386x( 0x33, &inregs, &outregs, &sregs );
|
| 578 |
inregs.w.ax = 0x8; /* vertical resolution */
|
| 579 |
inregs.w.cx = 0;
|
| 580 |
inregs.w.dx = ymax-1;
|
| 581 |
int386x( 0x33, &inregs, &outregs, &sregs );
|
| 582 |
|
| 583 |
/* install watcher */
|
| 584 |
|
| 585 |
inregs.w.ax = 0xC;
|
| 586 |
inregs.w.cx = M_LDOWN | M_LUP | M_MOTION;
|
| 587 |
function_ptr = mouse_handler;
|
| 588 |
inregs.x.edx = FP_OFF( function_ptr );
|
| 589 |
sregs.es = FP_SEG( function_ptr );
|
| 590 |
int386x( 0x33, &inregs, &outregs, &sregs );
|
| 591 |
|
| 592 |
return(1);
|
| 593 |
}
|
| 594 |
|
| 595 |
ms_done()
|
| 596 |
{
|
| 597 |
union REGS inregs, outregs;
|
| 598 |
|
| 599 |
/* uninstall watcher */
|
| 600 |
|
| 601 |
inregs.w.ax = 0;
|
| 602 |
int386 (0x33, &inregs, &outregs);
|
| 603 |
}
|
