view.c revision 1.13
1 /* $NetBSD: view.c,v 1.13 1996/10/13 04:11:12 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christian E. Hopps. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* The view major device is a placeholder device. It serves 34 * simply to map the semantics of a graphics dipslay to 35 * the semantics of a character block device. In other 36 * words the graphics system as currently built does not like to be 37 * refered to by open/close/ioctl. This device serves as 38 * a interface to graphics. */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/proc.h> 43 #include <sys/ioctl.h> 44 #include <sys/file.h> 45 #include <sys/device.h> 46 #include <sys/malloc.h> 47 #include <sys/queue.h> 48 #include <sys/conf.h> 49 #include <sys/poll.h> 50 #include <machine/cpu.h> 51 #include <atari/dev/grfabs_reg.h> 52 #include <atari/dev/viewioctl.h> 53 #include <atari/dev/viewvar.h> 54 #include "view.h" 55 56 static void view_display __P((struct view_softc *)); 57 static void view_remove __P((struct view_softc *)); 58 static int view_setsize __P((struct view_softc *, struct view_size *)); 59 static int view_get_colormap __P((struct view_softc *, colormap_t *)); 60 static int view_set_colormap __P((struct view_softc *, colormap_t *)); 61 62 struct view_softc views[NVIEW]; 63 static int view_inited; 64 65 int view_default_x; 66 int view_default_y; 67 int view_default_width = 640; 68 int view_default_height = 400; 69 int view_default_depth = 1; 70 71 /* 72 * functions for probeing. 73 */ 74 void viewattach __P((int)); 75 76 void 77 viewattach(cnt) 78 int cnt; 79 { 80 viewprobe(); 81 printf("%d view%s configured\n", NVIEW, NVIEW > 1 ? "s" : ""); 82 } 83 84 /* this function is called early to set up a display. */ 85 int 86 viewprobe() 87 { 88 int i; 89 90 if(view_inited) 91 return(1); 92 93 view_inited = 1; 94 95 for(i=0; i<NVIEW; i++) { 96 views[i].view = NULL; 97 views[i].flags = 0; 98 } 99 return(1); 100 } 101 102 103 /* 104 * Internal functions. 105 */ 106 107 static void 108 view_display (vu) 109 struct view_softc *vu; 110 { 111 int s, i; 112 113 if (vu == NULL) 114 return; 115 116 s = spltty(); 117 118 /* 119 * mark views that share this monitor as not displaying 120 */ 121 for (i = 0; i < NVIEW; i++) { 122 if(views[i].flags & VUF_DISPLAY) { 123 if (vu->view && (vu->view == views[i].view)) { 124 splx(s); 125 return; 126 } 127 if (views[i].view) { 128 grf_save_view(views[i].view); 129 views[i].view->flags &= ~VF_DISPLAY; 130 } 131 views[i].flags &= ~VUF_DISPLAY; 132 } 133 } 134 135 vu->flags |= VUF_ADDED; 136 if (vu->view) { 137 vu->view->display.x = vu->size.x; 138 vu->view->display.y = vu->size.y; 139 140 grf_display_view(vu->view); 141 vu->view->flags |= VF_DISPLAY; 142 143 vu->size.x = vu->view->display.x; 144 vu->size.y = vu->view->display.y; 145 vu->flags |= VUF_DISPLAY; 146 } 147 splx(s); 148 } 149 150 /* 151 * remove a view from our added list if it is marked as displaying 152 * switch to a new display. 153 */ 154 static void 155 view_remove(vu) 156 struct view_softc *vu; 157 { 158 int i; 159 160 if ((vu->flags & VUF_ADDED) == 0) 161 return; 162 163 vu->flags &= ~VUF_ADDED; 164 if (vu->flags & VUF_DISPLAY) { 165 for (i = 0; i < NVIEW; i++) { 166 if((views[i].flags & VUF_ADDED) && &views[i] != vu) { 167 view_display(&views[i]); 168 break; 169 } 170 } 171 } 172 vu->flags &= ~VUF_DISPLAY; 173 grf_remove_view(vu->view); 174 } 175 176 static int 177 view_setsize(vu, vs) 178 struct view_softc *vu; 179 struct view_size *vs; 180 { 181 view_t *new, *old; 182 dmode_t *dmode; 183 dimen_t ns; 184 int co, cs; 185 186 co = 0; 187 cs = 0; 188 if (vs->x != vu->size.x || vs->y != vu->size.y) 189 co = 1; 190 191 if (vs->width != vu->size.width || vs->height != vu->size.height || 192 vs->depth != vu->size.depth) 193 cs = 1; 194 195 if (cs == 0 && co == 0) 196 return(0); 197 198 ns.width = vs->width; 199 ns.height = vs->height; 200 201 if((dmode = grf_get_best_mode(&ns, vs->depth)) != NULL) { 202 /* 203 * If we can't do better, leave it 204 */ 205 if(dmode == vu->view->mode) 206 return(0); 207 } 208 new = grf_alloc_view(dmode, &ns, vs->depth); 209 if (new == NULL) 210 return(ENOMEM); 211 212 old = vu->view; 213 vu->view = new; 214 vu->size.x = new->display.x; 215 vu->size.y = new->display.y; 216 vu->size.width = new->display.width; 217 vu->size.height = new->display.height; 218 vu->size.depth = new->bitmap->depth; 219 220 /* 221 * we need a custom remove here to avoid letting 222 * another view display mark as not added or displayed 223 */ 224 if (vu->flags & VUF_DISPLAY) { 225 vu->flags &= ~(VUF_ADDED|VUF_DISPLAY); 226 view_display(vu); 227 } 228 grf_free_view(old); 229 return(0); 230 } 231 232 static int 233 view_get_colormap (vu, ucm) 234 struct view_softc *vu; 235 colormap_t *ucm; 236 { 237 int error; 238 long *cme; 239 long *uep; 240 241 if(ucm->size > MAX_CENTRIES) 242 return(EINVAL); 243 244 /* add one incase of zero, ick. */ 245 cme = malloc(sizeof(ucm->entry[0])*(ucm->size+1), M_IOCTLOPS,M_WAITOK); 246 if (cme == NULL) 247 return(ENOMEM); 248 249 error = 0; 250 uep = ucm->entry; 251 ucm->entry = cme; /* set entry to out alloc. */ 252 if(vu->view == NULL || grf_get_colormap(vu->view, ucm)) 253 error = EINVAL; 254 else error = copyout(cme, uep, sizeof(ucm->entry[0]) * ucm->size); 255 ucm->entry = uep; /* set entry back to users. */ 256 free(cme, M_IOCTLOPS); 257 return(error); 258 } 259 260 static int 261 view_set_colormap(vu, ucm) 262 struct view_softc *vu; 263 colormap_t *ucm; 264 { 265 colormap_t *cm; 266 int error = 0; 267 268 if(ucm->size > MAX_CENTRIES) 269 return(EINVAL); 270 271 cm = malloc(sizeof(ucm->entry[0])*ucm->size + sizeof(*cm), M_IOCTLOPS, 272 M_WAITOK); 273 if(cm == NULL) 274 return(ENOMEM); 275 276 bcopy(ucm, cm, sizeof(colormap_t)); 277 cm->entry = (long *)&cm[1]; /* table directly after. */ 278 if (((error = 279 copyin(ucm->entry,cm->entry,sizeof(ucm->entry[0])*ucm->size)) == 0) 280 && (vu->view == NULL || grf_use_colormap(vu->view, cm))) 281 error = EINVAL; 282 free(cm, M_IOCTLOPS); 283 return(error); 284 } 285 286 /* 287 * functions made available by conf.c 288 */ 289 290 /*ARGSUSED*/ 291 int 292 viewopen(dev, flags, mode, p) 293 dev_t dev; 294 int flags; 295 int mode; 296 struct proc *p; 297 { 298 dimen_t size; 299 struct view_softc *vu; 300 301 vu = &views[minor(dev)]; 302 303 if(minor(dev) >= NVIEW) 304 return(EXDEV); 305 if(vu->flags & VUF_OPEN) 306 return(EBUSY); 307 308 vu->size.x = view_default_x; 309 vu->size.y = view_default_y; 310 size.width = vu->size.width = view_default_width; 311 size.height = vu->size.height = view_default_height; 312 vu->size.depth = view_default_depth; 313 vu->view = grf_alloc_view(NULL, &size, vu->size.depth); 314 if (vu->view == NULL) 315 return(ENOMEM); 316 317 vu->size.x = vu->view->display.x; 318 vu->size.y = vu->view->display.y; 319 vu->size.width = vu->view->display.width; 320 vu->size.height = vu->view->display.height; 321 vu->size.depth = vu->view->bitmap->depth; 322 vu->flags |= VUF_OPEN; 323 return(0); 324 } 325 326 /*ARGSUSED*/ 327 int 328 viewclose (dev, flags, mode, p) 329 dev_t dev; 330 int flags; 331 int mode; 332 struct proc *p; 333 { 334 struct view_softc *vu; 335 336 vu = &views[minor(dev)]; 337 338 if ((vu->flags & VUF_OPEN) == 0) 339 return (0); /* XXX not open? */ 340 view_remove (vu); 341 grf_free_view (vu->view); 342 vu->flags = 0; 343 vu->view = NULL; 344 return (0); 345 } 346 347 348 /*ARGSUSED*/ 349 int 350 viewioctl (dev, cmd, data, flag, p) 351 dev_t dev; 352 u_long cmd; 353 caddr_t data; 354 int flag; 355 struct proc *p; 356 { 357 struct view_softc *vu; 358 bmap_t *bm; 359 int error; 360 361 vu = &views[minor(dev)]; 362 error = 0; 363 364 switch (cmd) { 365 case VIOCDISPLAY: 366 view_display(vu); 367 break; 368 case VIOCREMOVE: 369 view_remove(vu); 370 break; 371 case VIOCGSIZE: 372 bcopy(&vu->size, data, sizeof (struct view_size)); 373 break; 374 case VIOCSSIZE: 375 error = view_setsize(vu, (struct view_size *)data); 376 break; 377 case VIOCGBMAP: 378 bm = (bmap_t *)data; 379 bcopy(vu->view->bitmap, bm, sizeof(bmap_t)); 380 if (p != NOPROC) { 381 bm->plane = NULL; 382 bm->hw_address = NULL; 383 bm->regs = NULL; 384 bm->hw_regs = NULL; 385 } 386 break; 387 case VIOCGCMAP: 388 error = view_get_colormap(vu, (colormap_t *)data); 389 break; 390 case VIOCSCMAP: 391 error = view_set_colormap(vu, (colormap_t *)data); 392 break; 393 default: 394 error = EINVAL; 395 break; 396 } 397 return(error); 398 } 399 400 /*ARGSUSED*/ 401 int 402 viewmmap(dev, off, prot) 403 dev_t dev; 404 int off, prot; 405 { 406 struct view_softc *vu; 407 bmap_t *bm; 408 u_char *bmd_start; 409 u_long bmd_size; 410 411 vu = &views[minor(dev)]; 412 bm = vu->view->bitmap; 413 bmd_start = bm->hw_address; 414 bmd_size = bm->bytes_per_row*bm->rows*bm->depth; 415 416 if (off >= 0 && off < bmd_size) 417 return(((u_int)bmd_start + off) >> PGSHIFT); 418 419 return(-1); 420 } 421 422 /*ARGSUSED*/ 423 int 424 viewpoll(dev, events, p) 425 dev_t dev; 426 int events; 427 struct proc *p; 428 { 429 int revents = 0; 430 431 if (events & (POLLOUT | POLLWRNORM)) 432 revents |= events & (POLLOUT | POLLWRNORM); 433 return (revents); 434 } 435 436 view_t * 437 viewview(dev) 438 dev_t dev; 439 { 440 return(views[minor(dev)].view); 441 } 442
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