10 static char deffontname[] = "*default*";
13 int debuglockdisplay = 0;
15 static void _closedisplay(Display*, int);
31 geninitdraw(char *devdir, void(*error)(Display*, char*), char *fontname, char *label, char *windir, int ref)
37 display = initdisplay(devdir, windir, error);
44 df = getdefont(display);
45 display->defaultsubfont = df;
47 fprint(2, "imageinit: can't open default subfont: %r\n");
49 closedisplay(display);
54 fd = open("/env/font", OREAD);
56 n = read(fd, buf, sizeof(buf));
57 if(n>0 && n<sizeof buf-1){
65 * Build fonts with caches==depth of screen, for speed.
66 * If conversion were faster, we'd use 0 and save memory.
69 snprint(buf, sizeof buf, "%d %d\n0 %d\t%s\n", df->height, df->ascent,
70 df->n-1, deffontname);
71 //BUG: Need something better for this installsubfont("*default*", df);
72 font = buildfont(display, buf, deffontname);
74 fprint(2, "imageinit: can't open default font: %r\n");
78 font = openfont(display, fontname); /* BUG: grey fonts */
80 fprint(2, "imageinit: can't open font %s: %r\n", fontname);
84 display->defaultfont = font;
87 * Write label; ignore errors (we might not be running under rio)
90 snprint(buf, sizeof buf, "%s/label", display->windir);
91 fd = open(buf, OREAD);
93 read(fd, display->oldlabel, (sizeof display->oldlabel)-1);
95 fd = create(buf, OWRITE, 0666);
97 write(fd, label, strlen(label));
103 snprint(buf, sizeof buf, "%s/winname", display->windir);
104 if(gengetwindow(display, buf, &screen, &_screen, ref) < 0)
107 atexit(drawshutdown);
113 initdraw(void(*error)(Display*, char*), char *fontname , char *label)
117 if(access("/dev/draw/new", AEXIST)<0 && bind("#i", "/dev", MAFTER)<0){
118 fprint(2, "imageinit: can't bind /dev/draw: %r\n");
121 return geninitdraw(dev, error, fontname, label, dev, Refnone);
125 * Attach, or possibly reattach, to window.
126 * If reattaching, maintain value of screen pointer.
129 gengetwindow(Display *d, char *winname, Image **winp, Screen **scrp, int ref)
136 fd = open(winname, OREAD);
137 if(fd<0 || (n=read(fd, buf, sizeof buf-1))<=0){
138 if((image=d->image) == nil){
139 fprint(2, "gengetwindow: %r\n");
141 d->screenimage = nil;
144 strcpy(buf, "noborder");
150 freeimage((*scrp)->image);
154 image = namedimage(d, buf);
156 fprint(2, "namedimage %s failed: %r\n", buf);
158 d->screenimage = nil;
161 assert(image->chan != 0);
164 d->screenimage = image;
165 *scrp = allocscreen(image, d->white, 0);
167 freeimage(d->screenimage);
169 d->screenimage = nil;
174 if(strncmp(buf, "noborder", 8) != 0)
175 r = insetrect(image->r, Borderwidth);
176 *winp = _allocwindow(*winp, *scrp, r, ref, DWhite);
181 d->screenimage = nil;
184 d->screenimage = *winp;
185 assert((*winp)->chan != 0);
190 getwindow(Display *d, int ref)
194 snprint(winname, sizeof winname, "%s/winname", d->windir);
195 return gengetwindow(d, winname, &screen, &_screen, ref);
201 initdisplay(char *dev, char *win, void(*error)(Display*, char*))
203 char buf[128], info[NINFO+1], *t, isnew;
204 int n, datafd, ctlfd, reffd;
209 fmtinstall('P', Pfmt);
210 fmtinstall('R', Rfmt);
215 if(strlen(dev)>sizeof buf-25 || strlen(win)>sizeof buf-25){
216 werrstr("initdisplay: directory name too long");
223 sprint(buf, "%s/draw/new", dev);
224 ctlfd = open(buf, ORDWR|OCEXEC);
226 if(bind("#i", dev, MAFTER) < 0){
229 werrstr("initdisplay: %s: %r", buf);
232 ctlfd = open(buf, ORDWR|OCEXEC);
236 if((n=read(ctlfd, info, sizeof info)) < 12){
245 if(n < NINFO) /* this will do for now, we need something better here */
247 sprint(buf, "%s/draw/%d/data", dev, atoi(info+0*12));
248 datafd = open(buf, ORDWR|OCEXEC);
251 sprint(buf, "%s/draw/%d/refresh", dev, atoi(info+0*12));
252 reffd = open(buf, OREAD|OCEXEC);
258 disp = mallocz(sizeof(Display), 1);
272 image = mallocz(sizeof(Image), 1);
275 image->display = disp;
277 image->chan = strtochan(info+2*12);
278 image->depth = chantodepth(image->chan);
279 image->repl = atoi(info+3*12);
280 image->r.min.x = atoi(info+4*12);
281 image->r.min.y = atoi(info+5*12);
282 image->r.max.x = atoi(info+6*12);
283 image->r.max.y = atoi(info+7*12);
284 image->clipr.min.x = atoi(info+8*12);
285 image->clipr.min.y = atoi(info+9*12);
286 image->clipr.max.x = atoi(info+10*12);
287 image->clipr.max.y = atoi(info+11*12);
290 disp->_isnewdisplay = isnew;
291 disp->bufsize = iounit(datafd);
292 if(disp->bufsize <= 0)
293 disp->bufsize = 8000;
294 if(disp->bufsize < 512){
295 werrstr("iounit %d too small", disp->bufsize);
298 disp->buf = malloc(disp->bufsize+5); /* +5 for flush message */
303 disp->dirno = atoi(info+0*12);
307 disp->bufp = disp->buf;
310 disp->devdir = strdup(dev);
312 disp->white = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DWhite);
313 disp->black = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DBlack);
314 if(disp->white == nil || disp->black == nil){
320 disp->opaque = disp->white;
321 disp->transparent = disp->black;
322 dir = dirfstat(ctlfd);
323 if(dir!=nil && dir->type=='i'){
325 disp->dataqid = dir->qid.path;
327 if(dir!=nil && dir->qid.vers==1) /* other way to tell */
328 disp->_isnewdisplay = 1;
335 * Call with d unlocked.
336 * Note that disp->defaultfont and defaultsubfont are not freed here.
339 closedisplay(Display *disp)
341 _closedisplay(disp, 0);
345 _closedisplay(Display *disp, int isshutdown)
354 if(disp->oldlabel[0]){
355 snprint(buf, sizeof buf, "%s/label", disp->windir);
356 fd = open(buf, OWRITE);
358 write(fd, disp->oldlabel, strlen(disp->oldlabel));
364 * if we're shutting down, don't free all the resources.
365 * if other procs are getting shot down by notes too,
366 * one might get shot down while holding the malloc lock.
367 * just let the kernel clean things up when we exit.
374 freeimage(disp->white);
375 freeimage(disp->black);
378 /* should cause refresh slave to shut down */
380 qunlock(&disp->qlock);
385 lockdisplay(Display *disp)
387 if(debuglockdisplay){
388 /* avoid busy looping; it's rare we collide anyway */
389 while(!canqlock(&disp->qlock)){
390 fprint(1, "proc %d waiting for display lock...\n", getpid());
398 unlockdisplay(Display *disp)
400 qunlock(&disp->qlock);
404 drawerror(Display *d, char *s)
411 errstr(err, sizeof err);
412 fprint(2, "draw: %s: %s\n", s, err);
427 if((nn=write(d->fd, d->buf, n)) != n){
429 fprint(2, "flushimage fail: d=%p: n=%d nn=%d %r\n", d, n, nn); /**/
430 d->bufp = d->buf; /* might as well; chance of continuing */
438 flushimage(Display *d, int visible)
443 *d->bufp++ = 'v'; /* five bytes always reserved for this */
444 if(d->_isnewdisplay){
445 BPLONG(d->bufp, d->screenimage->id);
453 bufimage(Display *d, int n)
457 if(n<0 || n>d->bufsize){
458 werrstr("bad count in bufimage");
461 if(d->bufp+n > d->buf+d->bufsize)