view.c revision 1.8
1 /* $NetBSD: view.c,v 1.8 1996/04/18 08:52:11 leo 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 <machine/cpu.h> 50 #include <atari/dev/grfabs_reg.h> 51 #include <atari/dev/viewioctl.h> 52 #include <atari/dev/viewvar.h> 53 #include "view.h" 54 55 static void view_display __P((struct view_softc *)); 56 static void view_remove __P((struct view_softc *)); 57 static int view_setsize __P((struct view_softc *, struct view_size *)); 58 static int view_get_colormap __P((struct view_softc *, colormap_t *)); 59 static int view_set_colormap __P((struct view_softc *, colormap_t *)); 60 61 struct view_softc views[NVIEW]; 62 static int view_inited; 63 64 int view_default_x; 65 int view_default_y; 66 int view_default_width = 640; 67 int view_default_height = 400; 68 int view_default_depth = 1; 69 70 /* 71 * functions for probeing. 72 */ 73 void viewattach __P((int)); 74 75 void 76 viewattach(cnt) 77 int cnt; 78 { 79 viewprobe(); 80 printf("%d view%s configured\n", NVIEW, NVIEW > 1 ? "s" : ""); 81 } 82 83 /* this function is called early to set up a display. */ 84 int 85 viewprobe() 86 { 87 int i; 88 89 if(view_inited) 90 return(1); 91 92 view_inited = 1; 93 94 for(i=0; i<NVIEW; i++) { 95 views[i].view = NULL; 96 views[i].flags = 0; 97 } 98 return(1); 99 } 100 101 102 /* 103 * Internal functions. 104 */ 105 106 static void 107 view_display (vu) 108 struct view_softc *vu; 109 { 110 int s, i; 111 112 if (vu == NULL) 113 return; 114 115 s = spltty (); 116 117 /* 118 * mark views that share this monitor as not displaying 119 */ 120 for (i=0; i<NVIEW; i++) { 121 if(views[i].flags & VUF_DISPLAY) 122 views[i].flags &= ~VUF_DISPLAY; 123 } 124 125 vu->flags |= VUF_ADDED; 126 if (vu->view) { 127 vu->view->display.x = vu->size.x; 128 vu->view->display.y = vu->size.y; 129 130 grf_display_view(vu->view); 131 132 vu->size.x = vu->view->display.x; 133 vu->size.y = vu->view->display.y; 134 vu->flags |= VUF_DISPLAY; 135 } 136 splx(s); 137 } 138 139 /* 140 * remove a view from our added list if it is marked as displaying 141 * switch to a new display. 142 */ 143 static void 144 view_remove(vu) 145 struct view_softc *vu; 146 { 147 int i; 148 149 if ((vu->flags & VUF_ADDED) == 0) 150 return; 151 152 vu->flags &= ~VUF_ADDED; 153 if (vu->flags & VUF_DISPLAY) { 154 for (i = 0; i < NVIEW; i++) { 155 if((views[i].flags & VUF_ADDED) && &views[i] != vu) { 156 view_display(&views[i]); 157 break; 158 } 159 } 160 } 161 vu->flags &= ~VUF_DISPLAY; 162 grf_remove_view(vu->view); 163 } 164 165 static int 166 view_setsize(vu, vs) 167 struct view_softc *vu; 168 struct view_size *vs; 169 { 170 view_t *new, *old; 171 dmode_t *dmode; 172 dimen_t ns; 173 int co, cs; 174 175 co = 0; 176 cs = 0; 177 if (vs->x != vu->size.x || vs->y != vu->size.y) 178 co = 1; 179 180 if (vs->width != vu->size.width || vs->height != vu->size.height || 181 vs->depth != vu->size.depth) 182 cs = 1; 183 184 if (cs == 0 && co == 0) 185 return(0); 186 187 ns.width = vs->width; 188 ns.height = vs->height; 189 190 if((dmode = grf_get_best_mode(&ns, vs->depth)) != NULL) { 191 /* 192 * If we can't do better, leave it 193 */ 194 if(dmode == vu->view->mode) 195 return(0); 196 } 197 new = grf_alloc_view(dmode, &ns, vs->depth); 198 if (new == NULL) 199 return(ENOMEM); 200 201 old = vu->view; 202 vu->view = new; 203 vu->size.x = new->display.x; 204 vu->size.y = new->display.y; 205 vu->size.width = new->display.width; 206 vu->size.height = new->display.height; 207 vu->size.depth = new->bitmap->depth; 208 209 /* 210 * we need a custom remove here to avoid letting 211 * another view display mark as not added or displayed 212 */ 213 if (vu->flags & VUF_DISPLAY) { 214 vu->flags &= ~(VUF_ADDED|VUF_DISPLAY); 215 view_display(vu); 216 } 217 grf_free_view(old); 218 return(0); 219 } 220 221 static int 222 view_get_colormap (vu, ucm) 223 struct view_softc *vu; 224 colormap_t *ucm; 225 { 226 int error; 227 long *cme; 228 long *uep; 229 230 if(ucm->size > MAX_CENTRIES) 231 return(EINVAL); 232 233 /* add one incase of zero, ick. */ 234 cme = malloc(sizeof(ucm->entry[0])*(ucm->size+1), M_IOCTLOPS,M_WAITOK); 235 if (cme == NULL) 236 return(ENOMEM); 237 238 error = 0; 239 uep = ucm->entry; 240 ucm->entry = cme; /* set entry to out alloc. */ 241 if(vu->view == NULL || grf_get_colormap(vu->view, ucm)) 242 error = EINVAL; 243 else error = copyout(cme, uep, sizeof(ucm->entry[0]) * ucm->size); 244 ucm->entry = uep; /* set entry back to users. */ 245 free(cme, M_IOCTLOPS); 246 return(error); 247 } 248 249 static int 250 view_set_colormap(vu, ucm) 251 struct view_softc *vu; 252 colormap_t *ucm; 253 { 254 colormap_t *cm; 255 int error = 0; 256 257 if(ucm->size > MAX_CENTRIES) 258 return(EINVAL); 259 260 cm = malloc(sizeof(ucm->entry[0])*ucm->size + sizeof(*cm), M_IOCTLOPS, 261 M_WAITOK); 262 if(cm == NULL) 263 return(ENOMEM); 264 265 bcopy(ucm, cm, sizeof(colormap_t)); 266 cm->entry = (long *)&cm[1]; /* table directly after. */ 267 if (((error = 268 copyin(ucm->entry,cm->entry,sizeof(ucm->entry[0])*ucm->size)) == 0) 269 && (vu->view == NULL || grf_use_colormap(vu->view, cm))) 270 error = EINVAL; 271 free(cm, M_IOCTLOPS); 272 return(error); 273 } 274 275 /* 276 * functions made available by conf.c 277 */ 278 279 /*ARGSUSED*/ 280 int 281 viewopen(dev, flags, mode, p) 282 dev_t dev; 283 int flags; 284 int mode; 285 struct proc *p; 286 { 287 dimen_t size; 288 struct view_softc *vu; 289 290 vu = &views[minor(dev)]; 291 292 if(minor(dev) >= NVIEW) 293 return(EXDEV); 294 if(vu->flags & VUF_OPEN) 295 return(EBUSY); 296 297 vu->size.x = view_default_x; 298 vu->size.y = view_default_y; 299 size.width = vu->size.width = view_default_width; 300 size.height = vu->size.height = view_default_height; 301 vu->size.depth = view_default_depth; 302 vu->view = grf_alloc_view(NULL, &size, vu->size.depth); 303 if (vu->view == NULL) 304 return(ENOMEM); 305 306 vu->size.x = vu->view->display.x; 307 vu->size.y = vu->view->display.y; 308 vu->size.width = vu->view->display.width; 309 vu->size.height = vu->view->display.height; 310 vu->size.depth = vu->view->bitmap->depth; 311 vu->flags |= VUF_OPEN; 312 return(0); 313 } 314 315 /*ARGSUSED*/ 316 int 317 viewclose (dev, flags, mode, p) 318 dev_t dev; 319 int flags; 320 int mode; 321 struct proc *p; 322 { 323 struct view_softc *vu; 324 325 vu = &views[minor(dev)]; 326 327 if ((vu->flags & VUF_OPEN) == 0) 328 return (0); /* XXX not open? */ 329 view_remove (vu); 330 grf_free_view (vu->view); 331 vu->flags = 0; 332 vu->view = NULL; 333 return (0); 334 } 335 336 337 /*ARGSUSED*/ 338 int 339 viewioctl (dev, cmd, data, flag, p) 340 dev_t dev; 341 u_long cmd; 342 caddr_t data; 343 int flag; 344 struct proc *p; 345 { 346 struct view_softc *vu; 347 bmap_t *bm; 348 int error; 349 350 vu = &views[minor(dev)]; 351 error = 0; 352 353 switch (cmd) { 354 case VIOCDISPLAY: 355 view_display(vu); 356 break; 357 case VIOCREMOVE: 358 view_remove(vu); 359 break; 360 case VIOCGSIZE: 361 bcopy(&vu->size, data, sizeof (struct view_size)); 362 break; 363 case VIOCSSIZE: 364 error = view_setsize(vu, (struct view_size *)data); 365 break; 366 case VIOCGBMAP: 367 bm = (bmap_t *)data; 368 bcopy(vu->view->bitmap, bm, sizeof(bmap_t)); 369 if (p != NOPROC) { 370 bm->plane = NULL; 371 bm->hw_address = NULL; 372 } 373 break; 374 case VIOCGCMAP: 375 error = view_get_colormap(vu, (colormap_t *)data); 376 break; 377 case VIOCSCMAP: 378 error = view_set_colormap(vu, (colormap_t *)data); 379 break; 380 default: 381 error = EINVAL; 382 break; 383 } 384 return(error); 385 } 386 387 /*ARGSUSED*/ 388 int 389 viewmmap(dev, off, prot) 390 dev_t dev; 391 int off, prot; 392 { 393 struct view_softc *vu; 394 bmap_t *bm; 395 u_char *bmd_start; 396 u_long bmd_size; 397 398 vu = &views[minor(dev)]; 399 bm = vu->view->bitmap; 400 bmd_start = bm->hw_address; 401 bmd_size = bm->bytes_per_row*bm->rows*bm->depth; 402 403 if (off >= 0 && off < bmd_size) 404 return(((u_int)bmd_start + off) >> PGSHIFT); 405 406 return(-1); 407 } 408 409 /*ARGSUSED*/ 410 int 411 viewselect(dev, rw, p) 412 dev_t dev; 413 int rw; 414 struct proc *p; 415 { 416 if(rw == FREAD) 417 return(0); 418 return(1); 419 } 420 421 view_t * 422 viewview(dev) 423 dev_t dev; 424 { 425 return(views[minor(dev)].view); 426 } 427
Indexes created Mon Sep 22 13:09:51 GMT 2025