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;
48 closedisplay(display);
53 fd = open("/env/font", OREAD);
55 n = read(fd, buf, sizeof(buf));
56 if(n>0 && n<sizeof buf-1){
64 * Build fonts with caches==depth of screen, for speed.
65 * If conversion were faster, we'd use 0 and save memory.
68 snprint(buf, sizeof buf, "%d %d\n0 %d\t%s\n", df->height, df->ascent,
69 df->n-1, deffontname);
70 //BUG: Need something better for this installsubfont("*default*", df);
71 font = buildfont(display, buf, deffontname);
75 font = openfont(display, fontname); /* BUG: grey fonts */
79 display->defaultfont = font;
82 * Write label; ignore errors (we might not be running under rio)
85 snprint(buf, sizeof buf, "%s/label", display->windir);
86 fd = open(buf, OREAD);
88 read(fd, display->oldlabel, (sizeof display->oldlabel)-1);
90 fd = create(buf, OWRITE, 0666);
92 write(fd, label, strlen(label));
98 snprint(buf, sizeof buf, "%s/winname", display->windir);
99 if(gengetwindow(display, buf, &screen, &_screen, ref) < 0)
102 atexit(drawshutdown);
108 initdraw(void(*error)(Display*, char*), char *fontname, char *label)
110 static char dev[] = "/dev";
112 return geninitdraw(dev, error, fontname, label, dev, Refnone);
116 * Attach, or possibly reattach, to window.
117 * If reattaching, maintain value of screen pointer.
120 gengetwindow(Display *d, char *winname, Image **winp, Screen **scrp, int ref)
123 char buf[64+1], obuf[64+1];
129 fd = open(winname, OREAD);
130 if(fd<0 || (n=read(fd, buf, sizeof buf-1))<=0){
131 if((image=d->image) == nil){
133 d->screenimage = nil;
136 strcpy(buf, "noborder");
140 image = namedimage(d, buf);
143 * theres a race where the winname can change after
144 * we read it, so keep trying as long as the name
147 if(strcmp(buf, obuf) != 0){
154 freeimage((*scrp)->image);
160 d->screenimage = nil;
165 d->screenimage = image;
166 *scrp = allocscreen(image, d->white, 0);
169 d->screenimage = nil;
175 if(strncmp(buf, "noborder", 8) != 0)
176 r = insetrect(image->r, Borderwidth);
177 *winp = _allocwindow(*winp, *scrp, r, ref, DWhite);
181 d->screenimage = nil;
185 d->screenimage = *winp;
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);
228 werrstr("initdisplay: %s: %r", buf);
231 if((n=read(ctlfd, info, sizeof info)) < 12){
240 if(n < NINFO) /* this will do for now, we need something better here */
242 sprint(buf, "%s/draw/%d/data", dev, atoi(info+0*12));
243 datafd = open(buf, ORDWR|OCEXEC);
246 sprint(buf, "%s/draw/%d/refresh", dev, atoi(info+0*12));
247 reffd = open(buf, OREAD|OCEXEC);
253 disp = mallocz(sizeof(Display), 1);
267 image = mallocz(sizeof(Image), 1);
270 image->display = disp;
272 image->chan = strtochan(info+2*12);
273 image->depth = chantodepth(image->chan);
274 image->repl = atoi(info+3*12);
275 image->r.min.x = atoi(info+4*12);
276 image->r.min.y = atoi(info+5*12);
277 image->r.max.x = atoi(info+6*12);
278 image->r.max.y = atoi(info+7*12);
279 image->clipr.min.x = atoi(info+8*12);
280 image->clipr.min.y = atoi(info+9*12);
281 image->clipr.max.x = atoi(info+10*12);
282 image->clipr.max.y = atoi(info+11*12);
285 disp->_isnewdisplay = isnew;
286 disp->bufsize = iounit(datafd);
287 if(disp->bufsize <= 0)
288 disp->bufsize = 8000;
289 if(disp->bufsize < 512){
290 werrstr("iounit %d too small", disp->bufsize);
293 disp->buf = malloc(disp->bufsize+5); /* +5 for flush message */
298 disp->dirno = atoi(info+0*12);
302 disp->bufp = disp->buf;
305 disp->devdir = strdup(dev);
307 disp->white = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DWhite);
308 disp->black = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DBlack);
309 if(disp->white == nil || disp->black == nil){
315 disp->opaque = disp->white;
316 disp->transparent = disp->black;
317 dir = dirfstat(ctlfd);
318 if(dir!=nil && dir->type=='i'){
320 disp->dataqid = dir->qid.path;
322 if(dir!=nil && dir->qid.vers==1) /* other way to tell */
323 disp->_isnewdisplay = 1;
330 * Call with d unlocked.
331 * Note that disp->defaultfont and defaultsubfont are not freed here.
334 closedisplay(Display *disp)
336 _closedisplay(disp, 0);
340 _closedisplay(Display *disp, int isshutdown)
349 if(disp->oldlabel[0]){
350 snprint(buf, sizeof buf, "%s/label", disp->windir);
351 fd = open(buf, OWRITE);
353 write(fd, disp->oldlabel, strlen(disp->oldlabel));
359 * if we're shutting down, don't free all the resources.
360 * if other procs are getting shot down by notes too,
361 * one might get shot down while holding the malloc lock.
362 * just let the kernel clean things up when we exit.
369 freeimage(disp->white);
370 freeimage(disp->black);
373 /* should cause refresh slave to shut down */
375 qunlock(&disp->qlock);
380 lockdisplay(Display *disp)
382 if(debuglockdisplay){
383 /* avoid busy looping; it's rare we collide anyway */
384 while(!canqlock(&disp->qlock))
391 unlockdisplay(Display *disp)
393 qunlock(&disp->qlock);
397 drawerror(Display *d, char *s)
401 if(d != nil && d->error != nil)
404 errstr(err, sizeof err);
405 fprint(2, "draw: %s: %s\n", s, err);
420 if((nn=write(d->fd, d->buf, n)) != n){
422 fprint(2, "flushimage fail: d=%p: n=%d nn=%d %r\n", d, n, nn); /**/
423 d->bufp = d->buf; /* might as well; chance of continuing */
431 flushimage(Display *d, int visible)
436 *d->bufp++ = 'v'; /* five bytes always reserved for this */
437 if(d->_isnewdisplay){
438 BPLONG(d->bufp, d->screenimage->id);
446 bufimage(Display *d, int n)
450 if(n<0 || n>d->bufsize){
451 werrstr("bad count in bufimage");
454 if(d->bufp+n > d->buf+d->bufsize)