| 1 |
/* Copyright (c) 1992 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* vgaimage.c - driver for VGA board under DOS |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "standard.h" |
| 12 |
#include <graph.h> |
| 13 |
#include "color.h" |
| 14 |
#include "random.h" |
| 15 |
#include "resolu.h" |
| 16 |
#include <dos.h> |
| 17 |
#include <i86.h> |
| 18 |
|
| 19 |
#define M_RDOWN 0x8 |
| 20 |
#define M_RUP 0x10 |
| 21 |
#define M_LDOWN 0x2 |
| 22 |
#define M_LUP 0x4 |
| 23 |
#define M_MOTION 0x1 |
| 24 |
|
| 25 |
int crad; |
| 26 |
int mouse_event = 0; |
| 27 |
int mouse_xpos = -1; |
| 28 |
int mouse_ypos = -1; |
| 29 |
|
| 30 |
#define hide_cursor() move_cursor(-1,-1) |
| 31 |
#define show_cursor() move_cursor(mouse_xpos,mouse_ypos) |
| 32 |
|
| 33 |
#define CTRL(c) ((c)-'@') |
| 34 |
|
| 35 |
#define MAXWIDTH 1024 |
| 36 |
#define MAXHEIGHT 768 |
| 37 |
|
| 38 |
short ourblack = 0; ourwhite = 1; |
| 39 |
|
| 40 |
double gamcor = 2.2; /* gamma correction */ |
| 41 |
|
| 42 |
int dither = 1; /* dither colors? */ |
| 43 |
|
| 44 |
int maxcolors = 0; /* maximum colors */ |
| 45 |
int minpix = 0; /* minimum pixel value */ |
| 46 |
int greyscale = 0; /* in grey */ |
| 47 |
|
| 48 |
int scale = 0; /* scalefactor; power of two */ |
| 49 |
|
| 50 |
COLR scanline[MAXWIDTH]; /* scan line buffer */ |
| 51 |
|
| 52 |
int xmax, ymax; /* picture dimensions */ |
| 53 |
FILE *fin = stdin; /* input file */ |
| 54 |
long scanpos[MAXHEIGHT]; /* scan line positions in file */ |
| 55 |
int cury = 0; /* current scan location */ |
| 56 |
|
| 57 |
double exposure = 1.0; /* exposure compensation used */ |
| 58 |
|
| 59 |
int wrongformat = 0; /* input in another format? */ |
| 60 |
|
| 61 |
struct { |
| 62 |
int xmin, ymin, xsiz, ysiz; |
| 63 |
} box = {0, 0, 0, 0}; /* current box */ |
| 64 |
|
| 65 |
int initialized = 0; |
| 66 |
int cheight, cwidth; |
| 67 |
|
| 68 |
#define postext(x,y) _settextposition(1+(y)/cheight,1+(x)/cwidth) |
| 69 |
|
| 70 |
char *progname; |
| 71 |
|
| 72 |
char errmsg[128]; |
| 73 |
|
| 74 |
extern BYTE clrtab[256][3]; /* global color map */ |
| 75 |
|
| 76 |
extern long ftell(); |
| 77 |
|
| 78 |
|
| 79 |
main(argc, argv) |
| 80 |
int argc; |
| 81 |
char *argv[]; |
| 82 |
{ |
| 83 |
extern char *getenv(), *fixargv0(); |
| 84 |
char *gv; |
| 85 |
int headline(); |
| 86 |
int i; |
| 87 |
|
| 88 |
progname = argv[0] = fixargv0(argv[0]); |
| 89 |
if ((gv = getenv("GAMMA")) != NULL) |
| 90 |
gamcor = atof(gv); |
| 91 |
|
| 92 |
for (i = 1; i < argc; i++) |
| 93 |
if (argv[i][0] == '-') |
| 94 |
switch (argv[i][1]) { |
| 95 |
case 'c': |
| 96 |
maxcolors = atoi(argv[++i]); |
| 97 |
break; |
| 98 |
case 'b': |
| 99 |
greyscale = !greyscale; |
| 100 |
break; |
| 101 |
case 'm': |
| 102 |
maxcolors = 2; |
| 103 |
break; |
| 104 |
case 'd': |
| 105 |
dither = !dither; |
| 106 |
break; |
| 107 |
case 'e': |
| 108 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
| 109 |
goto userr; |
| 110 |
scale = atoi(argv[++i]); |
| 111 |
break; |
| 112 |
case 'g': |
| 113 |
gamcor = atof(argv[++i]); |
| 114 |
break; |
| 115 |
default: |
| 116 |
goto userr; |
| 117 |
} |
| 118 |
else |
| 119 |
break; |
| 120 |
|
| 121 |
if (i == argc-1) { /* open picture */ |
| 122 |
fin = fopen(argv[i], "r"); |
| 123 |
if (fin == NULL) { |
| 124 |
sprintf(errmsg, "cannot open file \"%s\"", argv[i]); |
| 125 |
quiterr(errmsg); |
| 126 |
} |
| 127 |
} else if (i != argc) |
| 128 |
goto userr; |
| 129 |
setmode(fileno(fin), O_BINARY); |
| 130 |
/* get header */ |
| 131 |
getheader(fin, headline, NULL); |
| 132 |
/* get picture dimensions */ |
| 133 |
if (wrongformat || fgetresolu(&xmax, &ymax, fin) < 0) |
| 134 |
quiterr("bad picture format"); |
| 135 |
if (xmax > MAXWIDTH | ymax > MAXHEIGHT) |
| 136 |
quiterr("input picture too large for VGA"); |
| 137 |
|
| 138 |
init(); /* initialize and display */ |
| 139 |
|
| 140 |
while (docommand()) /* loop on command */ |
| 141 |
; |
| 142 |
quiterr(NULL); |
| 143 |
userr: |
| 144 |
fprintf(stderr, |
| 145 |
"Usage: %s [-b][-m][-d][-c ncolors][-e +/-stops] file\n", progname); |
| 146 |
exit(1); |
| 147 |
} |
| 148 |
|
| 149 |
|
| 150 |
headline(s) /* get relevant info from header */ |
| 151 |
char *s; |
| 152 |
{ |
| 153 |
char fmt[32]; |
| 154 |
|
| 155 |
if (isexpos(s)) |
| 156 |
exposure *= exposval(s); |
| 157 |
else if (isformat(s)) { |
| 158 |
formatval(fmt, s); |
| 159 |
wrongformat = strcmp(fmt, COLRFMT); |
| 160 |
} |
| 161 |
} |
| 162 |
|
| 163 |
|
| 164 |
init() /* initialize and load display */ |
| 165 |
{ |
| 166 |
static struct { |
| 167 |
short mode; |
| 168 |
short xsiz, ysiz; |
| 169 |
} video[] = { |
| 170 |
{_MRES256COLOR, 320, 200}, |
| 171 |
{_VRES256COLOR, 640, 400}, |
| 172 |
{_SVRES256COLOR, 800, 600}, |
| 173 |
{_XRES256COLOR, 1024, 768}, |
| 174 |
-1 |
| 175 |
}; |
| 176 |
struct videoconfig config; |
| 177 |
register int i; |
| 178 |
/* pick a card... */ |
| 179 |
for (i = 0; video[i].mode != -1; i++) |
| 180 |
if (video[i].xsiz >= xmax && video[i].ysiz >= ymax) |
| 181 |
break; |
| 182 |
if (video[i].mode == -1) |
| 183 |
quiterr("input picture too large"); |
| 184 |
if (_setvideomode(video[i].mode) == 0) |
| 185 |
quiterr("inadequate display card for picture"); |
| 186 |
ms_init(); |
| 187 |
initialized = 1; |
| 188 |
_getvideoconfig(&config); |
| 189 |
if (maxcolors == 0) |
| 190 |
maxcolors = config.numcolors; |
| 191 |
if (maxcolors > 4) { |
| 192 |
maxcolors -= minpix = 2; |
| 193 |
_settextcolor(ourwhite); |
| 194 |
} |
| 195 |
cheight = config.numypixels/config.numtextrows; |
| 196 |
cwidth = config.numxpixels/config.numtextcols; |
| 197 |
/* clear scan position array */ |
| 198 |
for (i = 0; i < ymax; i++) |
| 199 |
scanpos[i] = -1; |
| 200 |
/* display image */ |
| 201 |
if (greyscale) |
| 202 |
greyimage(); |
| 203 |
else |
| 204 |
mappedimage(); |
| 205 |
} |
| 206 |
|
| 207 |
|
| 208 |
quiterr(err) /* print message and exit */ |
| 209 |
char *err; |
| 210 |
{ |
| 211 |
if (initialized) { |
| 212 |
ms_done(); |
| 213 |
_setvideomode(_DEFAULTMODE); |
| 214 |
} |
| 215 |
if (err != NULL) { |
| 216 |
fprintf(stderr, "%s: %s\n", progname, err); |
| 217 |
exit(1); |
| 218 |
} |
| 219 |
exit(0); |
| 220 |
} |
| 221 |
|
| 222 |
|
| 223 |
int |
| 224 |
docommand() /* execute command */ |
| 225 |
{ |
| 226 |
char buf[64]; |
| 227 |
COLOR cval; |
| 228 |
int com; |
| 229 |
double comp; |
| 230 |
|
| 231 |
while (!kbhit()) |
| 232 |
watch_mouse(); |
| 233 |
com = getch(); |
| 234 |
switch (com) { /* interpret command */ |
| 235 |
case 'q': |
| 236 |
case CTRL('Z'): /* quit */ |
| 237 |
return(0); |
| 238 |
case '\n': |
| 239 |
case '\r': |
| 240 |
case 'l': |
| 241 |
case 'c': /* value */ |
| 242 |
if (avgbox(cval) == -1) |
| 243 |
return(-1); |
| 244 |
switch (com) { |
| 245 |
case '\n': |
| 246 |
case '\r': /* radiance */ |
| 247 |
sprintf(buf, "%.3f", intens(cval)/exposure); |
| 248 |
break; |
| 249 |
case 'l': /* luminance */ |
| 250 |
sprintf(buf, "%.0fL", luminance(cval)/exposure); |
| 251 |
break; |
| 252 |
case 'c': /* color */ |
| 253 |
comp = pow(2.0, (double)scale); |
| 254 |
sprintf(buf, "(%.2f,%.2f,%.2f)", |
| 255 |
colval(cval,RED)*comp, |
| 256 |
colval(cval,GRN)*comp, |
| 257 |
colval(cval,BLU)*comp); |
| 258 |
break; |
| 259 |
} |
| 260 |
postext(box.xmin+box.xsiz/2, box.ymin+box.ysiz/2); |
| 261 |
hide_cursor(); |
| 262 |
_outtext(buf); |
| 263 |
show_cursor(); |
| 264 |
return(1); |
| 265 |
default: |
| 266 |
return(-1); |
| 267 |
} |
| 268 |
} |
| 269 |
|
| 270 |
|
| 271 |
watch_mouse() /* look after mousie */ |
| 272 |
{ |
| 273 |
int a_x, a_y, l_x, l_y; |
| 274 |
|
| 275 |
if (mouse_event & M_MOTION) |
| 276 |
move_cursor(mouse_xpos, mouse_ypos); |
| 277 |
if (!(mouse_event & M_LDOWN)) |
| 278 |
return; |
| 279 |
l_x = a_x = mouse_xpos; l_y = a_y = mouse_ypos; |
| 280 |
hide_cursor(); |
| 281 |
revbox(a_x, a_y, l_x, l_y); /* show box */ |
| 282 |
do { |
| 283 |
mouse_event = 0; |
| 284 |
while (!mouse_event) |
| 285 |
; |
| 286 |
if (mouse_event & M_MOTION) { |
| 287 |
revbox(a_x, a_y, l_x, l_y); |
| 288 |
revbox(a_x, a_y, l_x=mouse_xpos, l_y=mouse_ypos); |
| 289 |
} |
| 290 |
} while (!(mouse_event & M_LUP)); |
| 291 |
revbox(a_x, a_y, l_x, l_y); /* hide box */ |
| 292 |
show_cursor(); |
| 293 |
box.xmin = mouse_xpos; |
| 294 |
box.ymin = mouse_ypos; |
| 295 |
if (box.xmin > a_x) { |
| 296 |
box.xsiz = box.xmin - a_x + 1; |
| 297 |
box.xmin = a_x; |
| 298 |
} else { |
| 299 |
box.xsiz = a_x - box.xmin + 1; |
| 300 |
} |
| 301 |
if (box.ymin > a_y) { |
| 302 |
box.ysiz = box.ymin - a_y + 1; |
| 303 |
box.ymin = a_y; |
| 304 |
} else { |
| 305 |
box.ysiz = a_y - box.ymin + 1; |
| 306 |
} |
| 307 |
mouse_event = 0; |
| 308 |
} |
| 309 |
|
| 310 |
|
| 311 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */ |
| 312 |
int x0, y0, x1, y1; |
| 313 |
{ |
| 314 |
_setplotaction(_GXOR); |
| 315 |
_setcolor(255); |
| 316 |
_moveto(x0, y0); |
| 317 |
_lineto(x1, y0); |
| 318 |
_lineto(x1, y1); |
| 319 |
_lineto(x0, y1); |
| 320 |
_lineto(x0, y0); |
| 321 |
} |
| 322 |
|
| 323 |
|
| 324 |
int |
| 325 |
avgbox(clr) /* average color over current box */ |
| 326 |
COLOR clr; |
| 327 |
{ |
| 328 |
static COLOR lc; |
| 329 |
static int ll, lr, lt, lb; |
| 330 |
int left, right, top, bottom; |
| 331 |
int y; |
| 332 |
double d; |
| 333 |
COLOR ctmp; |
| 334 |
register int x; |
| 335 |
|
| 336 |
setcolor(clr, 0.0, 0.0, 0.0); |
| 337 |
left = box.xmin; |
| 338 |
right = left + box.xsiz; |
| 339 |
if (left < 0) |
| 340 |
left = 0; |
| 341 |
if (right > xmax) |
| 342 |
right = xmax; |
| 343 |
if (left >= right) |
| 344 |
return(-1); |
| 345 |
top = box.ymin; |
| 346 |
bottom = top + box.ysiz; |
| 347 |
if (top < 0) |
| 348 |
top = 0; |
| 349 |
if (bottom > ymax) |
| 350 |
bottom = ymax; |
| 351 |
if (top >= bottom) |
| 352 |
return(-1); |
| 353 |
if (left == ll && right == lr && top == lt && bottom == lb) { |
| 354 |
copycolor(clr, lc); |
| 355 |
return(0); |
| 356 |
} |
| 357 |
for (y = top; y < bottom; y++) { |
| 358 |
if (getscan(y) == -1) |
| 359 |
return(-1); |
| 360 |
for (x = left; x < right; x++) { |
| 361 |
colr_color(ctmp, scanline[x]); |
| 362 |
addcolor(clr, ctmp); |
| 363 |
} |
| 364 |
} |
| 365 |
d = 1.0/((right-left)*(bottom-top)); |
| 366 |
scalecolor(clr, d); |
| 367 |
ll = left; lr = right; lt = top; lb = bottom; |
| 368 |
copycolor(lc, clr); |
| 369 |
return(0); |
| 370 |
} |
| 371 |
|
| 372 |
|
| 373 |
setpalette() /* set our palette using clrtab */ |
| 374 |
{ |
| 375 |
long cvals[256]; |
| 376 |
register int i; |
| 377 |
|
| 378 |
if (minpix >= 2) { |
| 379 |
cvals[ourblack] = _BLACK; cvals[ourwhite] = _BRIGHTWHITE; |
| 380 |
} |
| 381 |
for (i = 0; i < maxcolors; i++) |
| 382 |
cvals[i+minpix] = clrtab[i][BLU]<<14 & 0x3f0000L | |
| 383 |
clrtab[i][GRN]<<6 & 0x3f00 | |
| 384 |
clrtab[i][RED]>>2; |
| 385 |
_remapallpalette(cvals); |
| 386 |
} |
| 387 |
|
| 388 |
|
| 389 |
greyimage() /* display greyscale image */ |
| 390 |
{ |
| 391 |
short thiscolor, lastcolor = -1; |
| 392 |
int y; |
| 393 |
register int x; |
| 394 |
/* set gamma correction */ |
| 395 |
setcolrgam(gamcor); |
| 396 |
/* set up color map */ |
| 397 |
for (x = 0; x < maxcolors; x++) |
| 398 |
clrtab[x][RED] = clrtab[x][GRN] = |
| 399 |
clrtab[x][BLU] = ((long)x*256+maxcolors/2)/maxcolors; |
| 400 |
setpalette(); |
| 401 |
_setplotaction(_GPSET); |
| 402 |
/* read and display file */ |
| 403 |
for (y = 0; y < ymax; y++) { |
| 404 |
getscan(y); |
| 405 |
if (scale) |
| 406 |
shiftcolrs(scanline, xmax, scale); |
| 407 |
colrs_gambs(scanline, xmax); |
| 408 |
if (maxcolors < 256) |
| 409 |
for (x = 0; x < xmax; x++) { |
| 410 |
thiscolor = ((long)normbright(scanline[x]) * |
| 411 |
maxcolors + 128) >> 8; |
| 412 |
if (thiscolor != lastcolor) |
| 413 |
_setcolor((lastcolor=thiscolor)+minpix); |
| 414 |
_setpixel(x, y); |
| 415 |
} |
| 416 |
else |
| 417 |
for (x = 0; x < xmax; x++) { |
| 418 |
thiscolor = normbright(scanline[x]); |
| 419 |
if (thiscolor != lastcolor) |
| 420 |
_setcolor((lastcolor=thiscolor)+minpix); |
| 421 |
_setpixel(x, y); |
| 422 |
} |
| 423 |
} |
| 424 |
} |
| 425 |
|
| 426 |
|
| 427 |
mappedimage() /* display color-mapped image */ |
| 428 |
{ |
| 429 |
BYTE bscan[MAXWIDTH]; |
| 430 |
int y; |
| 431 |
register int x; |
| 432 |
/* set gamma correction */ |
| 433 |
setcolrgam(gamcor); |
| 434 |
/* make histogram */ |
| 435 |
_outtext("Quantizing image -- Please wait..."); |
| 436 |
new_histo(); |
| 437 |
for (y = 0; y < ymax; y++) { |
| 438 |
if (getscan(y) < 0) |
| 439 |
quiterr("seek error in getmapped"); |
| 440 |
if (scale) |
| 441 |
shiftcolrs(scanline, xmax, scale); |
| 442 |
colrs_gambs(scanline, xmax); |
| 443 |
cnt_colrs(scanline, xmax); |
| 444 |
} |
| 445 |
/* map pixels */ |
| 446 |
if (!new_clrtab(maxcolors)) |
| 447 |
quiterr("cannot create color map"); |
| 448 |
setpalette(); |
| 449 |
_setplotaction(_GPSET); |
| 450 |
/* display image */ |
| 451 |
for (y = 0; y < ymax; y++) { |
| 452 |
if (getscan(y) < 0) |
| 453 |
quiterr("seek error in getmapped"); |
| 454 |
if (scale) |
| 455 |
shiftcolrs(scanline, xmax, scale); |
| 456 |
colrs_gambs(scanline, xmax); |
| 457 |
if (dither) |
| 458 |
dith_colrs(bscan, scanline, xmax); |
| 459 |
else |
| 460 |
map_colrs(bscan, scanline, xmax); |
| 461 |
for (x = 0; x < xmax; x++) { |
| 462 |
if (x==0 || bscan[x] != bscan[x-1]) |
| 463 |
_setcolor(bscan[x]+minpix); |
| 464 |
_setpixel(x, y); |
| 465 |
} |
| 466 |
} |
| 467 |
} |
| 468 |
|
| 469 |
|
| 470 |
getscan(y) |
| 471 |
int y; |
| 472 |
{ |
| 473 |
if (y != cury) { |
| 474 |
if (scanpos[y] == -1) |
| 475 |
return(-1); |
| 476 |
if (fseek(fin, scanpos[y], 0) == -1) |
| 477 |
quiterr("fseek error"); |
| 478 |
cury = y; |
| 479 |
} else if (scanpos != NULL && scanpos[y] == -1) |
| 480 |
scanpos[y] = ftell(fin); |
| 481 |
|
| 482 |
if (freadcolrs(scanline, xmax, fin) < 0) |
| 483 |
quiterr("picture read error"); |
| 484 |
|
| 485 |
cury++; |
| 486 |
return(0); |
| 487 |
} |
| 488 |
|
| 489 |
|
| 490 |
/* |
| 491 |
* Microsoft Mouse handling routines |
| 492 |
*/ |
| 493 |
|
| 494 |
|
| 495 |
#pragma off (check_stack) |
| 496 |
void _loadds far mouse_handler (int max, int mcx, int mdx) |
| 497 |
{ |
| 498 |
#pragma aux mouse_handler parm [EAX] [ECX] [EDX] |
| 499 |
mouse_event = max; |
| 500 |
mouse_xpos = mcx; |
| 501 |
mouse_ypos = mdx; |
| 502 |
} |
| 503 |
#pragma on (check_stack) |
| 504 |
|
| 505 |
|
| 506 |
void |
| 507 |
move_cursor(newx, newy) /* move cursor to new position */ |
| 508 |
int newx, newy; |
| 509 |
{ |
| 510 |
static char *imp = NULL; |
| 511 |
static int curx = -1, cury = -1; |
| 512 |
#define xcmin (curx-crad<0 ? 0 : curx-crad) |
| 513 |
#define ycmin (cury-crad<0 ? 0 : cury-crad) |
| 514 |
#define xcmax (curx+crad>=xmax ? xmax-1 : curx+crad) |
| 515 |
#define ycmax (cury+crad>=ymax ? ymax-1 : cury+crad) |
| 516 |
|
| 517 |
if (newx == curx & newy == cury) |
| 518 |
return; |
| 519 |
if (imp == NULL && |
| 520 |
(imp = bmalloc(_imagesize(0,0,2*crad+1,2*crad+1))) == NULL) { |
| 521 |
quiterr("out of memory in move_cursor"); |
| 522 |
} |
| 523 |
if (curx >= 0 & cury >= 0) /* clear old cursor */ |
| 524 |
_putimage(xcmin, ycmin, imp, _GPSET); |
| 525 |
/* record new position */ |
| 526 |
curx = newx; cury = newy; |
| 527 |
if (curx < 0 | cury < 0) |
| 528 |
return; /* no cursor */ |
| 529 |
/* save under new cursor */ |
| 530 |
_getimage(xcmin, ycmin, xcmax, ycmax, imp); |
| 531 |
/* draw new cursor */ |
| 532 |
_setplotaction(_GPSET); |
| 533 |
_setcolor(ourwhite); |
| 534 |
_rectangle(_GFILLINTERIOR, xcmin, cury-1, xcmax, cury+1); |
| 535 |
_rectangle(_GFILLINTERIOR, curx-1, ycmin, curx+1, ycmax); |
| 536 |
_setcolor(ourblack); |
| 537 |
_moveto(xcmin+1, cury); |
| 538 |
_lineto(xcmax-1, cury); |
| 539 |
_moveto(curx, ycmin+1); |
| 540 |
_lineto(curx, ycmax-1); |
| 541 |
#undef xcmin |
| 542 |
#undef ycmin |
| 543 |
#undef xcmax |
| 544 |
#undef ycmax |
| 545 |
} |
| 546 |
|
| 547 |
|
| 548 |
int |
| 549 |
ms_init() |
| 550 |
{ |
| 551 |
struct SREGS sregs; |
| 552 |
union REGS inregs, outregs; |
| 553 |
int far *ptr; |
| 554 |
int (far *function_ptr)(); |
| 555 |
|
| 556 |
segread(&sregs); |
| 557 |
|
| 558 |
/* check for mouse driver */ |
| 559 |
|
| 560 |
inregs.w.ax = 0; |
| 561 |
int386 (0x33, &inregs, &outregs); |
| 562 |
if( outregs.w.ax != -1 ) { |
| 563 |
return(0); |
| 564 |
} |
| 565 |
|
| 566 |
crad = ymax/40; |
| 567 |
|
| 568 |
/* set screen limits */ |
| 569 |
|
| 570 |
inregs.w.ax = 0x7; /* horizontal resolution */ |
| 571 |
inregs.w.cx = 0; |
| 572 |
inregs.w.dx = xmax-1; |
| 573 |
int386x( 0x33, &inregs, &outregs, &sregs ); |
| 574 |
inregs.w.ax = 0x8; /* vertical resolution */ |
| 575 |
inregs.w.cx = 0; |
| 576 |
inregs.w.dx = ymax-1; |
| 577 |
int386x( 0x33, &inregs, &outregs, &sregs ); |
| 578 |
|
| 579 |
/* install watcher */ |
| 580 |
|
| 581 |
inregs.w.ax = 0xC; |
| 582 |
inregs.w.cx = M_LDOWN | M_LUP | M_MOTION; |
| 583 |
function_ptr = mouse_handler; |
| 584 |
inregs.x.edx = FP_OFF( function_ptr ); |
| 585 |
sregs.es = FP_SEG( function_ptr ); |
| 586 |
int386x( 0x33, &inregs, &outregs, &sregs ); |
| 587 |
|
| 588 |
return(1); |
| 589 |
} |
| 590 |
|
| 591 |
ms_done() |
| 592 |
{ |
| 593 |
union REGS inregs, outregs; |
| 594 |
|
| 595 |
/* uninstall watcher */ |
| 596 |
|
| 597 |
inregs.w.ax = 0; |
| 598 |
int386 (0x33, &inregs, &outregs); |
| 599 |
} |
| 600 |
|
