1990/0613/port/devbit.c (diff list | history)

1990/06111/sys/src/9/port/devbit.c:34,39 – 1990/0613/sys/src/9/port/devbit.c:34,42 (short | long | prev | next)
1990/0327		ulong *wfree; /* pointer to next free word */ int lastid; /* last allocated bitmap id */
1990/0329		int init; /* freshly opened; init message pending */
1990/0613		int rid; /* read bitmap id */ int rminy; /* read miny */ int rmaxy; /* read maxy */
1990/0324		}bit;
1990/0327		#define FREE 0x80000000
1990/06111/sys/src/9/port/devbit.c:196,201 – 1990/0613/sys/src/9/port/devbit.c:199,205
1990/0324		error(0, Einuse); }
1990/0327		bit.lastid = -1;
1990/0613		bit.rid = -1;
1990/0604		bit.init = 0;
1990/05151		bit.ref = 1;
1990/05313		Cursortocursor(&arrow);
1990/06111/sys/src/9/port/devbit.c:258,264 – 1990/0613/sys/src/9/port/devbit.c:262,272
1990/0324		long bitread(Chan *c, void *va, long n) {
1990/0327		uchar *p;
1990/0613		uchar *p, *q; long miny, maxy, t, x, y; ulong l, nw, ws; int off; Bitmap *src;
1990/0327
1990/0324		if(c->qid & CHDIR) return devdirread(c, va, n, bitdir, NBIT, devgen);
1990/06111/sys/src/9/port/devbit.c:329,334 – 1990/0613/sys/src/9/port/devbit.c:337,384
1990/0505		n = 3; break; }
1990/0613		if(bit.rid >= 0){ /* * read * data bytewidth*(maxy-miny) */ src = &bit.map[bit.rid]; if(src->ldepth<0) error(0, Ebadbitmap); off = 0; if(bit.rid == 0) off = 1; miny = bit.rminy; maxy = bit.rmaxy; if(miny>maxy || miny<src->r.min.y || maxy>src->r.max.y) error(0, Ebadblt); ws = 1<<(3-src->ldepth); /* pixels per byte */ /* set l to number of bytes of incoming data per scan line */ if(src->r.min.x >= 0) l = (src->r.max.x+ws-1)/ws - src->r.min.x/ws; else{ /* make positive before divide */ t = (-src->r.min.x)+ws-1; t = (t/ws)*ws; l = (t+src->r.max.x+ws-1)/ws; } if(n < l*(maxy-miny)) error(0, Ebadblt); if(off) cursoroff(1); n = 0; p = va; for(y=miny; y<maxy; y++){ q = (uchar*)addr(src, Pt(src->r.min.x, y)); q += (src->r.min.x&((sizeof(ulong))*ws-1))/8; for(x=0; x<l; x++) *p++ = K2U(*q++); n += l; } if(off) cursoron(1); bit.rid = -1; break; }
1990/0505		error(0, Ebadblt); default:
1990/06111/sys/src/9/port/devbit.c:552,557 – 1990/0613/sys/src/9/port/devbit.c:602,632
1990/06111		cursoron(1); m -= 22; p += 22;
1990/0613		break; case 'r': /* * read * 'r' 1 * src id 2 * miny 4 * maxy 4 */ if(m < 11) error(0, Ebadblt); v = GSHORT(p+1); src = &bit.map[v]; if(v>=conf.nbitmap || src->ldepth<0) error(0, Ebadbitmap); miny = GLONG(p+3); maxy = GLONG(p+7); if(miny>maxy || miny<src->r.min.y || maxy>src->r.max.y) error(0, Ebadblt); bit.rid = v; bit.rminy = miny; bit.rmaxy = maxy; p += 11; m -= 11;
1990/06111		break;
1990/0329		case 's':