view.c revision 1.20.4.2
1 /* $NetBSD: view.c,v 1.20.4.2 2002/08/30 00:18:56 gehenna 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/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: view.c,v 1.20.4.2 2002/08/30 00:18:56 gehenna Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/ioctl.h> 47 #include <sys/file.h> 48 #include <sys/device.h> 49 #include <sys/malloc.h> 50 #include <sys/queue.h> 51 #include <sys/poll.h> 52 #include <sys/conf.h> 53 #include <machine/cpu.h> 54 #include <amiga/dev/grfabs_reg.h> 55 #include <amiga/dev/viewioctl.h> 56 #include <amiga/dev/viewvar.h> 57 58 #include "view.h" 59 60 static void view_display(struct view_softc *); 61 static void view_remove(struct view_softc *); 62 static int view_setsize(struct view_softc *, struct view_size *); 63 64 int view_get_colormap(struct view_softc *, colormap_t *); 65 int view_set_colormap(struct view_softc *, colormap_t *); 66 67 void viewattach(int); 68 69 struct view_softc views[NVIEW]; 70 int view_inited; /* also checked in ite_cc.c */ 71 72 int view_default_x; 73 int view_default_y; 74 int view_default_width = 640; 75 int view_default_height = 400; 76 int view_default_depth = 2; 77 78 dev_type_open(viewopen); 79 dev_type_close(viewclose); 80 dev_type_ioctl(viewioctl); 81 dev_type_poll(viewpoll); 82 dev_type_mmap(viewmmap); 83 84 const struct cdevsw view_cdevsw = { 85 viewopen, viewclose, nullread, nullwrite, viewioctl, 86 nostop, notty, viewpoll, viewmmap, 87 }; 88 89 /* 90 * functions for probeing. 91 */ 92 93 void 94 viewattach(int cnt) 95 { 96 viewprobe(); 97 printf("%d view%s configured\n", NVIEW, NVIEW > 1 ? "s" : ""); 98 } 99 100 /* this function is called early to set up a display. */ 101 void 102 viewprobe(void) 103 { 104 int i; 105 106 if (view_inited) 107 return; 108 109 view_inited = 1; 110 111 for (i=0; i<NVIEW; i++) { 112 views[i].view = NULL; 113 views[i].flags = 0; 114 } 115 return; 116 } 117 118 119 /* 120 * Internal functions. 121 */ 122 123 static void 124 view_display(struct view_softc *vu) 125 { 126 int s, i; 127 128 if (vu == NULL) 129 return; 130 131 s = spltty (); 132 133 /* 134 * mark views that share this monitor as not displaying 135 */ 136 for (i=0; i<NVIEW; i++) { 137 if ((views[i].flags & VUF_DISPLAY) && 138 views[i].monitor == vu->monitor) 139 views[i].flags &= ~VUF_DISPLAY; 140 } 141 142 vu->flags |= VUF_ADDED; 143 if (vu->view) { 144 vu->view->display.x = vu->size.x; 145 vu->view->display.y = vu->size.y; 146 147 grf_display_view(vu->view); 148 149 vu->size.x = vu->view->display.x; 150 vu->size.y = vu->view->display.y; 151 vu->flags |= VUF_DISPLAY; 152 } 153 splx(s); 154 } 155 156 /* 157 * remove a view from our added list if it is marked as displaying 158 * switch to a new display. 159 */ 160 static void 161 view_remove(struct view_softc *vu) 162 { 163 int i; 164 165 if ((vu->flags & VUF_ADDED) == 0) 166 return; 167 168 vu->flags &= ~VUF_ADDED; 169 if (vu->flags & VUF_DISPLAY) { 170 for (i = 0; i < NVIEW; i++) { 171 if ((views[i].flags & VUF_ADDED) && &views[i] != vu && 172 views[i].monitor == vu->monitor) { 173 view_display(&views[i]); 174 break; 175 } 176 } 177 } 178 vu->flags &= ~VUF_DISPLAY; 179 grf_remove_view(vu->view); 180 } 181 182 static int 183 view_setsize(struct view_softc *vu, struct view_size *vs) 184 { 185 view_t *new, *old; 186 dimen_t ns; 187 int co, cs; 188 189 co = 0; 190 cs = 0; 191 if (vs->x != vu->size.x || vs->y != vu->size.y) 192 co = 1; 193 194 if (vs->width != vu->size.width || vs->height != vu->size.height || 195 vs->depth != vu->size.depth) 196 cs = 1; 197 198 if (cs == 0 && co == 0) 199 return(0); 200 201 ns.width = vs->width; 202 ns.height = vs->height; 203 204 new = grf_alloc_view(NULL, &ns, vs->depth); 205 if (new == NULL) 206 return(ENOMEM); 207 208 old = vu->view; 209 vu->view = new; 210 vu->size.x = new->display.x; 211 vu->size.y = new->display.y; 212 vu->size.width = new->display.width; 213 vu->size.height = new->display.height; 214 vu->size.depth = new->bitmap->depth; 215 vu->mode = grf_get_display_mode(vu->view); 216 vu->monitor = grf_get_monitor(vu->mode); 217 vu->size.x = vs->x; 218 vu->size.y = vs->y; 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 /* 233 * functions made available by conf.c 234 */ 235 236 /*ARGSUSED*/ 237 int 238 viewopen(dev_t dev, int flags, int mode, struct proc *p) 239 { 240 dimen_t size; 241 struct view_softc *vu; 242 243 vu = &views[minor(dev)]; 244 245 if (minor(dev) >= NVIEW) 246 return(EXDEV); 247 248 if (vu->flags & VUF_OPEN) 249 return(EBUSY); 250 251 vu->size.x = view_default_x; 252 vu->size.y = view_default_y; 253 size.width = vu->size.width = view_default_width; 254 size.height = vu->size.height = view_default_height; 255 vu->size.depth = view_default_depth; 256 257 vu->view = grf_alloc_view(NULL, &size, vu->size.depth); 258 if (vu->view == NULL) 259 return(ENOMEM); 260 261 vu->size.x = vu->view->display.x; 262 vu->size.y = vu->view->display.y; 263 vu->size.width = vu->view->display.width; 264 vu->size.height = vu->view->display.height; 265 vu->size.depth = vu->view->bitmap->depth; 266 vu->flags |= VUF_OPEN; 267 vu->mode = grf_get_display_mode(vu->view); 268 vu->monitor = grf_get_monitor(vu->mode); 269 return(0); 270 } 271 272 /*ARGSUSED*/ 273 int 274 viewclose(dev_t dev, int flags, int mode, struct proc *p) 275 { 276 struct view_softc *vu; 277 278 vu = &views[minor(dev)]; 279 280 if ((vu->flags & VUF_OPEN) == 0) 281 return(0); 282 view_remove (vu); 283 grf_free_view (vu->view); 284 vu->flags = 0; 285 vu->view = NULL; 286 vu->mode = NULL; 287 vu->monitor = NULL; 288 return(0); 289 } 290 291 292 /*ARGSUSED*/ 293 int 294 viewioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 295 { 296 struct view_softc *vu; 297 bmap_t *bm; 298 int error; 299 300 vu = &views[minor(dev)]; 301 error = 0; 302 303 switch (cmd) { 304 case VIOCDISPLAY: 305 view_display(vu); 306 break; 307 case VIOCREMOVE: 308 view_remove(vu); 309 break; 310 case VIOCGSIZE: 311 bcopy(&vu->size, data, sizeof (struct view_size)); 312 break; 313 case VIOCSSIZE: 314 error = view_setsize(vu, (struct view_size *)data); 315 break; 316 case VIOCGBMAP: 317 bm = (bmap_t *)data; 318 bcopy(vu->view->bitmap, bm, sizeof(bmap_t)); 319 if (flag != -1) { 320 bm->plane = 0; 321 bm->blit_temp = 0; 322 bm->hardware_address = 0; 323 } 324 break; 325 case VIOCGCMAP: 326 error = view_get_colormap(vu, (colormap_t *)data); 327 break; 328 case VIOCSCMAP: 329 error = view_set_colormap(vu, (colormap_t *)data); 330 break; 331 default: 332 error = EPASSTHROUGH; 333 break; 334 } 335 return(error); 336 } 337 338 int 339 view_get_colormap(struct view_softc *vu, colormap_t *ucm) 340 { 341 int error; 342 u_long *cme; 343 u_long *uep; 344 345 /* add one incase of zero, ick. */ 346 if (ucm->size + 1 > SIZE_T_MAX / sizeof(u_long)) 347 return EINVAL; 348 cme = malloc(sizeof (u_long)*(ucm->size + 1), M_IOCTLOPS, M_WAITOK); 349 if (cme == NULL) 350 return(ENOMEM); 351 352 uep = ucm->entry; 353 error = 0; 354 ucm->entry = cme; /* set entry to out alloc. */ 355 if (vu->view == NULL || grf_get_colormap(vu->view, ucm)) 356 error = EINVAL; 357 else 358 error = copyout(cme, uep, sizeof(u_long) * ucm->size); 359 ucm->entry = uep; /* set entry back to users. */ 360 free(cme, M_IOCTLOPS); 361 return(error); 362 } 363 364 int 365 view_set_colormap(struct view_softc *vu, colormap_t *ucm) 366 { 367 colormap_t *cm; 368 int error; 369 370 error = 0; 371 cm = malloc(sizeof(u_long) * ucm->size + sizeof (*cm), M_IOCTLOPS, 372 M_WAITOK); 373 if (cm == NULL) 374 return(ENOMEM); 375 376 bcopy (ucm, cm, sizeof(colormap_t)); 377 cm->entry = (u_long *)&cm[1]; /* table directly after. */ 378 if (((error = 379 copyin(ucm->entry, cm->entry, sizeof (u_long) * ucm->size)) == 0) 380 && (vu->view == NULL || grf_use_colormap(vu->view, cm))) 381 error = EINVAL; 382 free(cm, M_IOCTLOPS); 383 return(error); 384 } 385 386 /*ARGSUSED*/ 387 paddr_t 388 viewmmap(dev_t dev, off_t off, int prot) 389 { 390 struct view_softc *vu; 391 bmap_t *bm; 392 u_char *bmd_start; 393 u_long bmd_size; 394 395 vu = &views[minor(dev)]; 396 bm = vu->view->bitmap; 397 bmd_start = bm->hardware_address; 398 bmd_size = bm->bytes_per_row*bm->rows*bm->depth; 399 400 if (off >= 0 && off < bmd_size) 401 return(((paddr_t)bmd_start + off) >> PGSHIFT); 402 403 return(-1); 404 } 405 406 /*ARGSUSED*/ 407 int 408 viewpoll(dev_t dev, int events, struct proc *p) 409 { 410 return(events & (POLLOUT | POLLWRNORM)); 411 } 412
Indexes created Tue Sep 30 11:09:46 GMT 2025