9 static char deffontname[] = "*default*";
12 int debuglockdisplay = 0;
14 static void _closedisplay(Display*, int);
30 geninitdraw(char *devdir, void(*error)(Display*, char*), char *fontname, char *label, char *windir, int ref)
36 display = initdisplay(devdir, windir, error);
43 df = getdefont(display);
44 display->defaultsubfont = df;
47 closedisplay(display);
52 fd = open("/env/font", OREAD);
54 n = read(fd, buf, sizeof(buf));
55 if(n>0 && n<sizeof buf-1){
63 * Build fonts with caches==depth of screen, for speed.
64 * If conversion were faster, we'd use 0 and save memory.
67 snprint(buf, sizeof buf, "%d %d\n0 %d\t%s\n", df->height, df->ascent,
68 df->n-1, deffontname);
69 //BUG: Need something better for this installsubfont("*default*", df);
70 font = buildfont(display, buf, deffontname);
74 font = openfont(display, fontname); /* BUG: grey fonts */
78 display->defaultfont = font;
81 * Write label; ignore errors (we might not be running under rio)
84 snprint(buf, sizeof buf, "%s/label", display->windir);
85 fd = open(buf, OREAD);
87 read(fd, display->oldlabel, (sizeof display->oldlabel)-1);
89 fd = create(buf, OWRITE, 0666);
91 write(fd, label, strlen(label));
97 snprint(buf, sizeof buf, "%s/winname", display->windir);
98 if(gengetwindow(display, buf, &screen, &_screen, ref) < 0)
101 atexit(drawshutdown);
107 initdraw(void(*error)(Display*, char*), char *fontname, char *label)
109 static char dev[] = "/dev";
111 return geninitdraw(dev, error, fontname, label, dev, Refnone);
115 * Attach, or possibly reattach, to window.
116 * If reattaching, maintain value of screen pointer.
119 gengetwindow(Display *d, char *winname, Image **winp, Screen **scrp, int ref)
122 char buf[64+1], obuf[64+1];
128 fd = open(winname, OREAD);
129 if(fd<0 || (n=read(fd, buf, sizeof buf-1))<=0){
130 if((image=d->image) == nil){
132 d->screenimage = nil;
135 strcpy(buf, "noborder");
139 image = namedimage(d, buf);
142 * theres a race where the winname can change after
143 * we read it, so keep trying as long as the name
146 if(strcmp(buf, obuf) != 0){
153 freeimage((*scrp)->image);
159 d->screenimage = nil;
164 d->screenimage = image;
165 *scrp = allocscreen(image, d->white, 0);
168 d->screenimage = nil;
174 if(strncmp(buf, "noborder", 8) != 0)
175 r = insetrect(image->r, Borderwidth);
176 *winp = _allocwindow(*winp, *scrp, r, ref, DWhite);
180 d->screenimage = nil;
184 d->screenimage = *winp;
189 getwindow(Display *d, int ref)
193 snprint(winname, sizeof winname, "%s/winname", d->windir);
194 return gengetwindow(d, winname, &screen, &_screen, ref);
200 initdisplay(char *dev, char *win, void(*error)(Display*, char*))
202 char buf[128], info[NINFO+1], *t, isnew;
203 int n, datafd, ctlfd, reffd;
208 fmtinstall('P', Pfmt);
209 fmtinstall('R', Rfmt);
214 if(strlen(dev)>sizeof buf-25 || strlen(win)>sizeof buf-25){
215 werrstr("initdisplay: directory name too long");
222 sprint(buf, "%s/draw/new", dev);
223 ctlfd = open(buf, ORDWR|OCEXEC);
227 werrstr("initdisplay: %s: %r", buf);
230 if((n=read(ctlfd, info, sizeof info)) < 12){
239 if(n < NINFO) /* this will do for now, we need something better here */
241 sprint(buf, "%s/draw/%d/data", dev, atoi(info+0*12));
242 datafd = open(buf, ORDWR|OCEXEC);
245 sprint(buf, "%s/draw/%d/refresh", dev, atoi(info+0*12));
246 reffd = open(buf, OREAD|OCEXEC);
252 disp = mallocz(sizeof(Display), 1);
266 image = mallocz(sizeof(Image), 1);
269 image->display = disp;
271 image->chan = strtochan(info+2*12);
272 image->depth = chantodepth(image->chan);
273 image->repl = atoi(info+3*12);
274 image->r.min.x = atoi(info+4*12);
275 image->r.min.y = atoi(info+5*12);
276 image->r.max.x = atoi(info+6*12);
277 image->r.max.y = atoi(info+7*12);
278 image->clipr.min.x = atoi(info+8*12);
279 image->clipr.min.y = atoi(info+9*12);
280 image->clipr.max.x = atoi(info+10*12);
281 image->clipr.max.y = atoi(info+11*12);
284 disp->_isnewdisplay = isnew;
285 disp->bufsize = iounit(datafd);
286 if(disp->bufsize <= 0)
287 disp->bufsize = 8000;
288 if(disp->bufsize < 512){
289 werrstr("iounit %d too small", disp->bufsize);
292 disp->buf = malloc(disp->bufsize+5); /* +5 for flush message */
297 disp->dirno = atoi(info+0*12);
301 disp->bufp = disp->buf;
304 disp->devdir = strdup(dev);
306 disp->white = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DWhite);
307 disp->black = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DBlack);
308 if(disp->white == nil || disp->black == nil){
314 disp->opaque = disp->white;
315 disp->transparent = disp->black;
316 dir = dirfstat(ctlfd);
317 if(dir!=nil && dir->type=='i'){
319 disp->dataqid = dir->qid.path;
321 if(dir!=nil && dir->qid.vers==1) /* other way to tell */
322 disp->_isnewdisplay = 1;
329 * Call with d unlocked.
330 * Note that disp->defaultfont and defaultsubfont are not freed here.
333 closedisplay(Display *disp)
335 _closedisplay(disp, 0);
339 _closedisplay(Display *disp, int isshutdown)
348 if(disp->oldlabel[0]){
349 snprint(buf, sizeof buf, "%s/label", disp->windir);
350 fd = open(buf, OWRITE);
352 write(fd, disp->oldlabel, strlen(disp->oldlabel));
358 * if we're shutting down, don't free all the resources.
359 * if other procs are getting shot down by notes too,
360 * one might get shot down while holding the malloc lock.
361 * just let the kernel clean things up when we exit.
368 freeimage(disp->white);
369 freeimage(disp->black);
372 /* should cause refresh slave to shut down */
374 qunlock(&disp->qlock);
379 lockdisplay(Display *disp)
381 if(debuglockdisplay){
382 /* avoid busy looping; it's rare we collide anyway */
383 while(!canqlock(&disp->qlock))
390 unlockdisplay(Display *disp)
392 qunlock(&disp->qlock);
396 drawerror(Display *d, char *s)
400 if(d != nil && d->error != nil)
403 errstr(err, sizeof err);
404 fprint(2, "draw: %s: %s\n", s, err);
419 if(write(d->fd, d->buf, n) != n){
420 d->bufp = d->buf; /* might as well; chance of continuing */
428 flushimage(Display *d, int visible)
433 *d->bufp++ = 'v'; /* five bytes always reserved for this */
434 if(d->_isnewdisplay){
435 BPLONG(d->bufp, d->screenimage->id);
443 bufimage(Display *d, int n)
447 if(n<0 || n>d->bufsize){
448 werrstr("bad count in bufimage");
451 if(d->bufp+n > d->buf+d->bufsize)