| 1 |
/* Copyright (c) 1987 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* x10.c - driver for X-windows version 10.4 |
| 9 |
* |
| 10 |
* 5/7/87 |
| 11 |
*/ |
| 12 |
|
| 13 |
#include <stdio.h> |
| 14 |
|
| 15 |
#include <sys/ioctl.h> |
| 16 |
|
| 17 |
#include <X/Xlib.h> |
| 18 |
#include <X/cursors/bcross.cursor> |
| 19 |
#include <X/cursors/bcross_mask.cursor> |
| 20 |
|
| 21 |
#include "color.h" |
| 22 |
|
| 23 |
#include "driver.h" |
| 24 |
|
| 25 |
#include "xtwind.h" |
| 26 |
|
| 27 |
#define GAMMA 2.0 /* exponent for color correction */ |
| 28 |
|
| 29 |
#define BORWIDTH 5 /* border width */ |
| 30 |
#define BARHEIGHT 25 /* menu bar size */ |
| 31 |
#define COMHEIGHT (COMLH*COMCH) /* command line height (pixels) */ |
| 32 |
|
| 33 |
#define COMFN "8x13" /* command line font name */ |
| 34 |
#define COMLH 3 /* number of command lines */ |
| 35 |
#define COMCW 8 /* approx. character width (pixels) */ |
| 36 |
#define COMCH 13 /* approx. character height (pixels) */ |
| 37 |
|
| 38 |
#ifndef WFLUSH |
| 39 |
#define WFLUSH 30 /* flush after this many rays */ |
| 40 |
#endif |
| 41 |
|
| 42 |
#define hashcolr(c) ((67*(c)[RED]+59*(c)[GRN]+71*(c)[BLU])%ncolors) |
| 43 |
|
| 44 |
#define checkinp() while (XPending() > 0) getevent() |
| 45 |
|
| 46 |
#define levptr(etype) ((etype *)&thisevent) |
| 47 |
|
| 48 |
static char *clientname; /* calling client's name */ |
| 49 |
|
| 50 |
static XEvent thisevent; /* current event */ |
| 51 |
|
| 52 |
static int colres = 128; /* color resolution */ |
| 53 |
static COLR colrmap[256]; /* our color mapping */ |
| 54 |
|
| 55 |
static int ncolors = 0; /* color table size */ |
| 56 |
static COLR *colrtbl; /* our color table */ |
| 57 |
static int *pixval; /* associated pixel values */ |
| 58 |
|
| 59 |
static Display *ourdisplay = NULL; /* our display */ |
| 60 |
|
| 61 |
static Window gwind = 0; /* our graphics window */ |
| 62 |
|
| 63 |
static Cursor pickcursor = 0; /* cursor used for picking */ |
| 64 |
|
| 65 |
static int gwidth = 0; /* graphics window width */ |
| 66 |
static int gheight = 0; /* graphics window height */ |
| 67 |
|
| 68 |
static TEXTWIND *comline = NULL; /* our command line */ |
| 69 |
|
| 70 |
static char c_queue[64]; /* input queue */ |
| 71 |
static int c_first = 0; /* first character in queue */ |
| 72 |
static int c_last = 0; /* last character in queue */ |
| 73 |
|
| 74 |
extern char *malloc(); |
| 75 |
|
| 76 |
int x_close(), x_clear(), x_paintr(), x_errout(), |
| 77 |
x_getcur(), x_comout(), x_comin(); |
| 78 |
|
| 79 |
static struct driver x_driver = { |
| 80 |
x_close, x_clear, x_paintr, x_getcur, |
| 81 |
x_comout, x_comin, |
| 82 |
MAXRES, MAXRES |
| 83 |
}; |
| 84 |
|
| 85 |
|
| 86 |
struct driver * |
| 87 |
x_init(name) /* initialize driver */ |
| 88 |
char *name; |
| 89 |
{ |
| 90 |
ourdisplay = XOpenDisplay(NULL); |
| 91 |
if (ourdisplay == NULL) { |
| 92 |
stderr_v("cannot open X-windows; DISPLAY variable set?\n"); |
| 93 |
return(NULL); |
| 94 |
} |
| 95 |
if (DisplayPlanes() < 4) { |
| 96 |
stderr_v("not enough colors\n"); |
| 97 |
return(NULL); |
| 98 |
} |
| 99 |
if (getmap() < 0) /* not fatal */ |
| 100 |
stderr_v("cannot allocate colors\n"); |
| 101 |
|
| 102 |
pickcursor = XCreateCursor(bcross_width, bcross_height, |
| 103 |
bcross_bits, bcross_mask_bits, |
| 104 |
bcross_x_hot, bcross_y_hot, |
| 105 |
BlackPixel, WhitePixel, GXcopy); |
| 106 |
clientname = name; |
| 107 |
x_driver.inpready = 0; |
| 108 |
cmdvec = x_comout; /* set error vectors */ |
| 109 |
if (wrnvec != NULL) |
| 110 |
wrnvec = x_errout; |
| 111 |
return(&x_driver); |
| 112 |
} |
| 113 |
|
| 114 |
|
| 115 |
static |
| 116 |
x_close() /* close our display */ |
| 117 |
{ |
| 118 |
cmdvec = NULL; /* reset error vectors */ |
| 119 |
if (wrnvec != NULL) |
| 120 |
wrnvec = stderr_v; |
| 121 |
if (ourdisplay == NULL) |
| 122 |
return; |
| 123 |
if (comline != NULL) { |
| 124 |
xt_close(comline); |
| 125 |
comline = NULL; |
| 126 |
} |
| 127 |
if (gwind != 0) { |
| 128 |
XDestroyWindow(gwind); |
| 129 |
gwind = 0; |
| 130 |
gwidth = gheight = 0; |
| 131 |
} |
| 132 |
XFreeCursor(pickcursor); |
| 133 |
freemap(); |
| 134 |
XCloseDisplay(ourdisplay); |
| 135 |
ourdisplay = NULL; |
| 136 |
} |
| 137 |
|
| 138 |
|
| 139 |
static |
| 140 |
x_clear(xres, yres) /* clear our display */ |
| 141 |
int xres, yres; |
| 142 |
{ |
| 143 |
if (xres != gwidth || yres != gheight) { /* new window */ |
| 144 |
if (comline != NULL) |
| 145 |
xt_close(comline); |
| 146 |
if (gwind != 0) |
| 147 |
XDestroyWindow(gwind); |
| 148 |
gwind = XCreateWindow(RootWindow, 0, BARHEIGHT, |
| 149 |
xres, yres+COMHEIGHT, BORWIDTH, |
| 150 |
BlackPixmap, BlackPixmap); |
| 151 |
if (gwind == 0) |
| 152 |
goto fail; |
| 153 |
comline = xt_open(gwind, 0, yres, xres, COMHEIGHT, 0, COMFN); |
| 154 |
if (comline == NULL) |
| 155 |
goto fail; |
| 156 |
XMapWindow(gwind); |
| 157 |
XSelectInput(gwind, |
| 158 |
KeyPressed|ButtonPressed|ExposeWindow|ExposeRegion|UnmapWindow); |
| 159 |
XStoreName(gwind, clientname); |
| 160 |
gwidth = xres; |
| 161 |
gheight = yres; |
| 162 |
} else /* just clear */ |
| 163 |
XClear(gwind); |
| 164 |
newmap(); |
| 165 |
checkinp(); |
| 166 |
return; |
| 167 |
fail: |
| 168 |
stderr_v("Failure opening window in x_clear\n"); |
| 169 |
quit(1); |
| 170 |
} |
| 171 |
|
| 172 |
|
| 173 |
static |
| 174 |
x_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */ |
| 175 |
COLOR col; |
| 176 |
int xmin, ymin, xmax, ymax; |
| 177 |
{ |
| 178 |
extern long nrays; /* global ray count */ |
| 179 |
static long lastflush = 0; /* ray count at last flush */ |
| 180 |
int ndx; |
| 181 |
|
| 182 |
if (ncolors > 0) { |
| 183 |
if ((ndx = colindex(col)) < 0) { |
| 184 |
colres >>= 1; |
| 185 |
redraw(); |
| 186 |
return; |
| 187 |
} |
| 188 |
XPixSet(gwind, xmin, gheight-ymax, xmax-xmin, ymax-ymin, |
| 189 |
pixval[ndx]); |
| 190 |
} |
| 191 |
if (nrays - lastflush >= WFLUSH) { |
| 192 |
if (ncolors <= 0) /* output necessary for death */ |
| 193 |
XPixSet(gwind,0,0,1,1,BlackPixel); |
| 194 |
checkinp(); |
| 195 |
lastflush = nrays; |
| 196 |
} |
| 197 |
} |
| 198 |
|
| 199 |
|
| 200 |
static |
| 201 |
x_comin(inp) /* read in a command line */ |
| 202 |
char *inp; |
| 203 |
{ |
| 204 |
int x_getc(), x_comout(); |
| 205 |
|
| 206 |
xt_cursor(comline, TBLKCURS); |
| 207 |
editline(inp, x_getc, x_comout); |
| 208 |
xt_cursor(comline, TNOCURS); |
| 209 |
} |
| 210 |
|
| 211 |
|
| 212 |
static |
| 213 |
x_comout(out) /* output a string to command line */ |
| 214 |
char *out; |
| 215 |
{ |
| 216 |
if (comline != NULL) |
| 217 |
xt_puts(out, comline); |
| 218 |
XFlush(); |
| 219 |
} |
| 220 |
|
| 221 |
|
| 222 |
static |
| 223 |
x_errout(msg) /* output an error message */ |
| 224 |
char *msg; |
| 225 |
{ |
| 226 |
x_comout(msg); |
| 227 |
stderr_v(msg); /* send to stderr also! */ |
| 228 |
} |
| 229 |
|
| 230 |
|
| 231 |
static int |
| 232 |
x_getcur(xp, yp) /* get cursor position */ |
| 233 |
int *xp, *yp; |
| 234 |
{ |
| 235 |
while (XGrabMouse(gwind, pickcursor, ButtonPressed) == 0) |
| 236 |
sleep(1); |
| 237 |
XFocusKeyboard(gwind); |
| 238 |
do |
| 239 |
getevent(); |
| 240 |
while (c_last <= c_first && levptr(XEvent)->type != ButtonPressed); |
| 241 |
*xp = levptr(XKeyOrButtonEvent)->x; |
| 242 |
*yp = gheight-1 - levptr(XKeyOrButtonEvent)->y; |
| 243 |
XFocusKeyboard(RootWindow); |
| 244 |
XUngrabMouse(); |
| 245 |
XFlush(); /* insure release */ |
| 246 |
if (c_last > c_first) /* key pressed */ |
| 247 |
return(x_getc()); |
| 248 |
/* button pressed */ |
| 249 |
switch (levptr(XKeyOrButtonEvent)->detail & 0377) { |
| 250 |
case LeftButton: |
| 251 |
return(MB1); |
| 252 |
case MiddleButton: |
| 253 |
return(MB2); |
| 254 |
case RightButton: |
| 255 |
return(MB3); |
| 256 |
} |
| 257 |
return(ABORT); |
| 258 |
} |
| 259 |
|
| 260 |
|
| 261 |
static int |
| 262 |
colindex(col) /* return index for color */ |
| 263 |
COLOR col; |
| 264 |
{ |
| 265 |
static COLR clr; |
| 266 |
int hval; |
| 267 |
register int ndx, i; |
| 268 |
|
| 269 |
mapcolor(clr, col); |
| 270 |
|
| 271 |
hval = ndx = hashcolr(clr); |
| 272 |
|
| 273 |
for (i = 1; i < ncolors; i++) { |
| 274 |
if (colrtbl[ndx][EXP] == 0) { |
| 275 |
colrtbl[ndx][RED] = clr[RED]; |
| 276 |
colrtbl[ndx][GRN] = clr[GRN]; |
| 277 |
colrtbl[ndx][BLU] = clr[BLU]; |
| 278 |
colrtbl[ndx][EXP] = COLXS; |
| 279 |
newcolr(ndx, clr); |
| 280 |
return(ndx); |
| 281 |
} |
| 282 |
if ( colrtbl[ndx][RED] == clr[RED] && |
| 283 |
colrtbl[ndx][GRN] == clr[GRN] && |
| 284 |
colrtbl[ndx][BLU] == clr[BLU] ) |
| 285 |
return(ndx); |
| 286 |
ndx = (hval + i*i) % ncolors; |
| 287 |
} |
| 288 |
return(-1); |
| 289 |
} |
| 290 |
|
| 291 |
|
| 292 |
static |
| 293 |
newcolr(ndx, clr) /* enter a color into hardware table */ |
| 294 |
int ndx; |
| 295 |
COLR clr; |
| 296 |
{ |
| 297 |
Color xcolor; |
| 298 |
|
| 299 |
xcolor.pixel = pixval[ndx]; |
| 300 |
xcolor.red = clr[RED] << 8; |
| 301 |
xcolor.green = clr[GRN] << 8; |
| 302 |
xcolor.blue = clr[BLU] << 8; |
| 303 |
|
| 304 |
XStoreColor(&xcolor); |
| 305 |
} |
| 306 |
|
| 307 |
|
| 308 |
static |
| 309 |
mapcolor(clr, col) /* map to our color space */ |
| 310 |
COLR clr; |
| 311 |
COLOR col; |
| 312 |
{ |
| 313 |
register int i, p; |
| 314 |
/* compute color table value */ |
| 315 |
for (i = 0; i < 3; i++) { |
| 316 |
p = colval(col,i) * 255.0 + 0.5; |
| 317 |
if (p < 0) p = 0; |
| 318 |
else if (p > 255) p = 255; |
| 319 |
clr[i] = colrmap[p][i]; |
| 320 |
} |
| 321 |
clr[EXP] = COLXS; |
| 322 |
} |
| 323 |
|
| 324 |
|
| 325 |
static |
| 326 |
getmap() /* get the color map */ |
| 327 |
{ |
| 328 |
int planes; |
| 329 |
|
| 330 |
for (ncolors=(1<<DisplayPlanes())-3; ncolors>12; ncolors=ncolors*.937){ |
| 331 |
colrtbl = (COLR *)malloc(ncolors*sizeof(COLR)); |
| 332 |
pixval = (int *)malloc(ncolors*sizeof(int)); |
| 333 |
if (colrtbl == NULL || pixval == NULL) |
| 334 |
return(-1); |
| 335 |
if (XGetColorCells(0,ncolors,0,&planes,pixval) != 0) |
| 336 |
return(0); |
| 337 |
free((char *)colrtbl); |
| 338 |
free((char *)pixval); |
| 339 |
} |
| 340 |
ncolors = 0; |
| 341 |
return(-1); |
| 342 |
} |
| 343 |
|
| 344 |
|
| 345 |
static |
| 346 |
freemap() /* free our color map */ |
| 347 |
{ |
| 348 |
if (ncolors == 0) |
| 349 |
return; |
| 350 |
XFreeColors(pixval, ncolors, 0); |
| 351 |
free((char *)colrtbl); |
| 352 |
free((char *)pixval); |
| 353 |
ncolors = 0; |
| 354 |
} |
| 355 |
|
| 356 |
|
| 357 |
static |
| 358 |
newmap() /* initialize the color map */ |
| 359 |
{ |
| 360 |
double pow(); |
| 361 |
int val; |
| 362 |
register int i; |
| 363 |
|
| 364 |
for (i = 0; i < 256; i++) { |
| 365 |
val = pow(i/256.0, 1.0/GAMMA) * colres; |
| 366 |
val = (val*256 + 128) / colres; |
| 367 |
colrmap[i][RED] = colrmap[i][GRN] = colrmap[i][BLU] = val; |
| 368 |
colrmap[i][EXP] = COLXS; |
| 369 |
} |
| 370 |
for (i = 0; i < ncolors; i++) |
| 371 |
colrtbl[i][EXP] = 0; |
| 372 |
} |
| 373 |
|
| 374 |
|
| 375 |
static int |
| 376 |
x_getc() /* get a command character */ |
| 377 |
{ |
| 378 |
while (c_last <= c_first) { |
| 379 |
c_first = c_last = 0; /* reset */ |
| 380 |
getevent(); /* wait for key */ |
| 381 |
} |
| 382 |
x_driver.inpready--; |
| 383 |
return(c_queue[c_first++]); |
| 384 |
} |
| 385 |
|
| 386 |
|
| 387 |
static |
| 388 |
getevent() /* get next event */ |
| 389 |
{ |
| 390 |
XNextEvent(levptr(XEvent)); |
| 391 |
switch (levptr(XEvent)->type) { |
| 392 |
case KeyPressed: |
| 393 |
getkey(levptr(XKeyPressedEvent)); |
| 394 |
break; |
| 395 |
case ExposeWindow: |
| 396 |
if (ncolors == 0 && levptr(XExposeEvent)->subwindow == 0) |
| 397 |
if (getmap() < 0) |
| 398 |
stderr_v("cannot grab colors\n"); |
| 399 |
else |
| 400 |
newmap(); |
| 401 |
/* fall through */ |
| 402 |
case ExposeRegion: |
| 403 |
fixwindow(levptr(XExposeEvent)); |
| 404 |
break; |
| 405 |
case UnmapWindow: |
| 406 |
if (levptr(XUnmapEvent)->subwindow == 0) |
| 407 |
freemap(); |
| 408 |
break; |
| 409 |
case ButtonPressed: /* handled in x_getcur() */ |
| 410 |
break; |
| 411 |
} |
| 412 |
} |
| 413 |
|
| 414 |
|
| 415 |
static |
| 416 |
getkey(ekey) /* get input key */ |
| 417 |
register XKeyPressedEvent *ekey; |
| 418 |
{ |
| 419 |
int n; |
| 420 |
register char *str; |
| 421 |
|
| 422 |
str = XLookupMapping(ekey, &n); |
| 423 |
while (n-- > 0 && c_last < sizeof(c_queue)) |
| 424 |
c_queue[c_last++] = *str++; |
| 425 |
x_driver.inpready = c_last - c_first; |
| 426 |
} |
| 427 |
|
| 428 |
|
| 429 |
static |
| 430 |
fixwindow(eexp) /* repair damage to window */ |
| 431 |
register XExposeEvent *eexp; |
| 432 |
{ |
| 433 |
if (eexp->subwindow == 0) |
| 434 |
repaint(eexp->x, gheight - eexp->y - eexp->height, |
| 435 |
eexp->x + eexp->width, gheight - eexp->y); |
| 436 |
else if (eexp->subwindow == comline->w) |
| 437 |
xt_redraw(comline); |
| 438 |
} |
