20060303a

46 files changed, 4355 insertions, 0 deletions

diff --git a/libdraw/NOTICE b/libdraw/NOTICE
new file mode 100644
index 00000000..39682bb2
--- /dev/null
+++ b/libdraw/NOTICE
@@ -0,0 +1,31 @@
+This copyright NOTICE applies to all files in this directory and
+subdirectories, unless another copyright notice appears in a given
+file or subdirectory.  If you take substantial code from this software to use in
+other programs, you must somehow include with it an appropriate
+copyright notice that includes the copyright notice and the other
+notices below.  It is fine (and often tidier) to do that in a separate
+file such as NOTICE, LICENCE or COPYING.
+
+	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
+	Portions Copyright © 1997-1999 Vita Nuova Limited
+	Portions Copyright © 2000-2006 Vita Nuova Holdings Limited (www.vitanuova.com)
+	Revisions Copyright © 2000-2006 Lucent Technologies Inc. and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
diff --git a/libdraw/alloc.c b/libdraw/alloc.c
new file mode 100644
index 00000000..f2da35da
--- /dev/null
+++ b/libdraw/alloc.c
@@ -0,0 +1,237 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+Image*
+allocimage(Display *d, Rectangle r, ulong chan, int repl, ulong val)
+{
+	return _allocimage(nil, d, r, chan, repl, val, 0, 0);
+}
+
+Image*
+_allocimage(Image *ai, Display *d, Rectangle r, ulong chan, int repl, ulong val, int screenid, int refresh)
+{
+	uchar *a;
+	char *err;
+	Image *i;
+	Rectangle clipr;
+	int id;
+	int depth;
+
+	err = 0;
+	i = 0;
+
+	if(chan == 0){
+		kwerrstr("bad channel descriptor");
+		return nil;
+	}
+
+	depth = chantodepth(chan);
+	if(depth == 0){
+		err = "bad channel descriptor";
+    Error:
+		if(err)
+			kwerrstr("allocimage: %s", err);
+		else
+			kwerrstr("allocimage: %r");
+		free(i);
+		return 0;
+	}
+
+	/* flush pending data so we don't get error allocating the image */
+	flushimage(d, 0);
+	a = bufimage(d, 1+4+4+1+4+1+4*4+4*4+4);
+	if(a == 0)
+		goto Error;
+	d->imageid++;
+	id = d->imageid;
+	a[0] = 'b';
+	BPLONG(a+1, id);
+	BPLONG(a+5, screenid);
+	a[9] = refresh;
+	BPLONG(a+10, chan);
+	a[14] = repl;
+	BPLONG(a+15, r.min.x);
+	BPLONG(a+19, r.min.y);
+	BPLONG(a+23, r.max.x);
+	BPLONG(a+27, r.max.y);
+	if(repl)
+		/* huge but not infinite, so various offsets will leave it huge, not overflow */
+		clipr = Rect(-0x3FFFFFFF, -0x3FFFFFFF, 0x3FFFFFFF, 0x3FFFFFFF);
+	else
+		clipr = r;
+	BPLONG(a+31, clipr.min.x);
+	BPLONG(a+35, clipr.min.y);
+	BPLONG(a+39, clipr.max.x);
+	BPLONG(a+43, clipr.max.y);
+	BPLONG(a+47, val);
+	if(flushimage(d, 0) < 0)
+		goto Error;
+
+	if(ai)
+		i = ai;
+	else{
+		i = malloc(sizeof(Image));
+		if(i == nil){
+			a = bufimage(d, 1+4);
+			if(a){
+				a[0] = 'f';
+				BPLONG(a+1, id);
+				flushimage(d, 0);
+			}
+			goto Error;
+		}
+	}
+	i->display = d;
+	i->id = id;
+	i->depth = depth;
+	i->chan = chan;
+	i->r = r;
+	i->clipr = clipr;
+	i->repl = repl;
+	i->screen = 0;
+	i->next = 0;
+	return i;
+}
+
+Image*
+namedimage(Display *d, char *name)
+{
+	uchar *a;
+	char *err, buf[12*12+1];
+	Image *i;
+	int id, n;
+	ulong chan;
+
+	err = 0;
+	i = 0;
+
+	n = strlen(name);
+	if(n >= 256){
+		err = "name too long";
+    Error:
+		if(err)
+			kwerrstr("namedimage: %s", err);
+		else
+			kwerrstr("namedimage: %r");
+		if(i)
+			free(i);
+		return 0;
+	}
+	/* flush pending data so we don't get error allocating the image */
+	flushimage(d, 0);
+	a = bufimage(d, 1+4+1+n);
+	if(a == 0)
+		goto Error;
+	d->imageid++;
+	id = d->imageid;
+	a[0] = 'n';
+	BPLONG(a+1, id);
+	a[5] = n;
+	memmove(a+6, name, n);
+	if(flushimage(d, 0) < 0)
+		goto Error;
+
+	if(kchanio(d->ctlchan, buf, sizeof buf, OREAD) < 12*12)
+		goto Error;
+	buf[12*12] = '\0';
+
+	i = malloc(sizeof(Image));
+	if(i == nil){
+	Error1:
+		a = bufimage(d, 1+4);
+		if(a){
+			a[0] = 'f';
+			BPLONG(a+1, id);
+			flushimage(d, 0);
+		}
+		goto Error;
+	}
+	i->display = d;
+	i->id = id;
+	if((chan=strtochan(buf+2*12))==0){
+		kwerrstr("bad channel from devdraw");
+		goto Error1;
+	}
+	i->chan = chan;
+	i->depth = chantodepth(chan);
+	i->repl = atoi(buf+3*12);
+	i->r.min.x = atoi(buf+4*12);
+	i->r.min.y = atoi(buf+5*12);
+	i->r.max.x = atoi(buf+6*12);
+	i->r.max.y = atoi(buf+7*12);
+	i->clipr.min.x = atoi(buf+8*12);
+	i->clipr.min.y = atoi(buf+9*12);
+	i->clipr.max.x = atoi(buf+10*12);
+	i->clipr.max.y = atoi(buf+11*12);
+	i->screen = 0;
+	i->next = 0;
+	return i;
+}
+
+int
+nameimage(Image *i, char *name, int in)
+{
+	uchar *a;
+	int n;
+
+	n = strlen(name);
+	a = bufimage(i->display, 1+4+1+1+n);
+	if(a == 0)
+		return 0;
+	a[0] = 'N';
+	BPLONG(a+1, i->id);
+	a[5] = in;
+	a[6] = n;
+	memmove(a+7, name, n);
+	if(flushimage(i->display, 0) < 0)
+		return 0;
+	return 1;
+}
+
+int
+_freeimage1(Image *i)
+{
+	uchar *a;
+	Display *d;
+	Image *w;
+
+	if(i == 0)
+		return 0;
+	/* make sure no refresh events occur on this if we block in the write */
+	d = i->display;
+	/* flush pending data so we don't get error deleting the image */
+	flushimage(d, 0);
+	a = bufimage(d, 1+4);
+	if(a == 0)
+		return -1;
+	a[0] = 'f';
+	BPLONG(a+1, i->id);
+	if(i->screen){
+		w = d->windows;
+		if(w == i)
+			d->windows = i->next;
+		else
+			while(w){
+				if(w->next == i){
+					w->next = i->next;
+					break;
+				}
+				w = w->next;
+			}
+	}
+	if(flushimage(d, i->screen!=0) < 0)
+		return -1;
+
+	return 0;
+}
+
+int
+freeimage(Image *i)
+{
+	int ret;
+
+	ret = _freeimage1(i);
+	free(i);
+	return ret;
+}
diff --git a/libdraw/allocimagemix.c b/libdraw/allocimagemix.c
new file mode 100644
index 00000000..73501fea
--- /dev/null
+++ b/libdraw/allocimagemix.c
@@ -0,0 +1,42 @@
+#include "lib9.h"
+#include "draw.h"
+
+Image*
+allocimagemix(Display *d, ulong color1, ulong color3)
+{
+	Image *t, *b;
+	static Image *qmask;
+
+	if(qmask == nil)
+		qmask = allocimage(d, Rect(0,0,1,1), GREY8, 1, 0x3F3F3FFF);
+		
+	if(d->depth <= 8){	/* create a 2×2 texture */
+		t = allocimage(d, Rect(0,0,1,1), d->chan, 0, color1);
+		if(t == nil)
+			return nil;
+
+		b = allocimage(d, Rect(0,0,2,2), d->chan, 1, color3);
+		if(b == nil){
+			freeimage(t);
+			return nil;
+		}
+
+		draw(b, Rect(0,0,1,1), t, nil, ZP);
+		freeimage(t);
+		return b;
+	}else{	/* use a solid color, blended using alpha */
+		t = allocimage(d, Rect(0,0,1,1), d->chan, 1, color1);
+		if(t == nil)
+			return nil;
+
+		b = allocimage(d, Rect(0,0,1,1), d->chan, 1, color3);
+		if(b == nil){
+			freeimage(t);
+			return nil;
+		}
+
+		draw(b, b->r, t, qmask, ZP);
+		freeimage(t);
+		return b;
+	}
+}
diff --git a/libdraw/arith.c b/libdraw/arith.c
new file mode 100644
index 00000000..178b1e82
--- /dev/null
+++ b/libdraw/arith.c
@@ -0,0 +1,203 @@
+#include "lib9.h"
+#include "draw.h"
+
+Point
+Pt(int x, int y)
+{
+	Point p;
+
+	p.x = x;
+	p.y = y;
+	return p;
+}
+
+Rectangle
+Rect(int x, int y, int bx, int by)
+{
+	Rectangle r;
+
+	r.min.x = x;
+	r.min.y = y;
+	r.max.x = bx;
+	r.max.y = by;
+	return r;
+}
+
+Rectangle
+Rpt(Point min, Point max)
+{
+	Rectangle r;
+
+	r.min = min;
+	r.max = max;
+	return r;
+}
+
+Point
+addpt(Point a, Point b)
+{
+	a.x += b.x;
+	a.y += b.y;
+	return a;
+}
+
+Point
+subpt(Point a, Point b)
+{
+	a.x -= b.x;
+	a.y -= b.y;
+	return a;
+}
+
+Rectangle
+insetrect(Rectangle r, int n)
+{
+	r.min.x += n;
+	r.min.y += n;
+	r.max.x -= n;
+	r.max.y -= n;
+	return r;
+}
+
+Point
+divpt(Point a, int b)
+{
+	a.x /= b;
+	a.y /= b;
+	return a;
+}
+
+Point
+mulpt(Point a, int b)
+{
+	a.x *= b;
+	a.y *= b;
+	return a;
+}
+
+Rectangle
+rectsubpt(Rectangle r, Point p)
+{
+	r.min.x -= p.x;
+	r.min.y -= p.y;
+	r.max.x -= p.x;
+	r.max.y -= p.y;
+	return r;
+}
+
+Rectangle
+rectaddpt(Rectangle r, Point p)
+{
+	r.min.x += p.x;
+	r.min.y += p.y;
+	r.max.x += p.x;
+	r.max.y += p.y;
+	return r;
+}
+
+int
+eqpt(Point p, Point q)
+{
+	return p.x==q.x && p.y==q.y;
+}
+
+int
+eqrect(Rectangle r, Rectangle s)
+{
+	return r.min.x==s.min.x && r.max.x==s.max.x &&
+	       r.min.y==s.min.y && r.max.y==s.max.y;
+}
+
+int
+rectXrect(Rectangle r, Rectangle s)
+{
+	return r.min.x<s.max.x && s.min.x<r.max.x &&
+	       r.min.y<s.max.y && s.min.y<r.max.y;
+}
+
+int
+rectinrect(Rectangle r, Rectangle s)
+{
+	return s.min.x<=r.min.x && r.max.x<=s.max.x && s.min.y<=r.min.y && r.max.y<=s.max.y;
+}
+
+int
+ptinrect(Point p, Rectangle r)
+{
+	return p.x>=r.min.x && p.x<r.max.x &&
+	       p.y>=r.min.y && p.y<r.max.y;
+}
+
+Rectangle
+canonrect(Rectangle r)
+{
+	int t;
+	if (r.max.x < r.min.x) {
+		t = r.min.x;
+		r.min.x = r.max.x;
+		r.max.x = t;
+	}
+	if (r.max.y < r.min.y) {
+		t = r.min.y;
+		r.min.y = r.max.y;
+		r.max.y = t;
+	}
+	return r;
+}
+
+void
+combinerect(Rectangle *r1, Rectangle r2)
+{
+	if(r1->min.x > r2.min.x)
+		r1->min.x = r2.min.x;
+	if(r1->min.y > r2.min.y)
+		r1->min.y = r2.min.y;
+	if(r1->max.x < r2.max.x)
+		r1->max.x = r2.max.x;
+	if(r1->max.y < r2.max.y)
+		r1->max.y = r2.max.y;
+}
+
+ulong
+drawld2chan[] = {
+	GREY1,
+	GREY2,
+	GREY4,
+	CMAP8,
+};
+
+ulong
+setalpha(ulong color, uchar alpha)
+{
+	int red, green, blue;
+
+	red = (color >> 3*8) & 0xFF;
+	green = (color >> 2*8) & 0xFF;
+	blue = (color >> 1*8) & 0xFF;
+	/* ignore incoming alpha */
+	red = (red * alpha)/255;
+	green = (green * alpha)/255;
+	blue = (blue * alpha)/255;
+	return (red<<3*8) | (green<<2*8) | (blue<<1*8) | (alpha<<0*8);
+}
+
+Point	ZP;
+Rectangle ZR;
+int
+Rfmt(Fmt *f)
+{
+	Rectangle r;
+
+	r = va_arg(f->args, Rectangle);
+	return fmtprint(f, "%P %P", r.min, r.max);
+}
+
+int
+Pfmt(Fmt *f)
+{
+	Point p;
+
+	p = va_arg(f->args, Point);
+	return fmtprint(f, "[%d %d]", p.x, p.y);
+}
+
diff --git a/libdraw/bezier.c b/libdraw/bezier.c
new file mode 100644
index 00000000..d26fc444
--- /dev/null
+++ b/libdraw/bezier.c
@@ -0,0 +1,243 @@
+#include "lib9.h"
+#include "draw.h"
+
+#define	PINC	32		/* realloc granularity */
+
+typedef struct Plist Plist;
+struct Plist
+{
+	Point *p;
+	int np;			/* -1 if malloc/realloc failed */
+};
+
+static void
+appendpt(Plist *l, Point p)
+{
+	if(l->np == -1)
+		return;
+	if(l->np == 0)
+		l->p = malloc(PINC*sizeof(Point));
+	else if(l->np%PINC == 0)
+		l->p = realloc(l->p, (l->np+PINC)*sizeof(Point));
+	if(l->p == 0){
+		l->np = -1;
+		return;
+	}
+	l->p[l->np++] = p;
+}
+
+static int
+normsq(Point p)
+{
+	return p.x*p.x+p.y*p.y;
+}
+
+static int
+psdist(Point p, Point a, Point b)
+{
+	int num, den;
+
+	p = subpt(p, a);
+	b = subpt(b, a);
+	num = p.x*b.x + p.y*b.y;
+	if(num <= 0)
+		return normsq(p);
+	den = normsq(b);
+	if(num >= den)
+		return normsq(subpt(b, p));
+	return normsq(subpt(divpt(mulpt(b, num), den), p));
+}
+
+/*
+ * Convert cubic Bezier curve control points to polyline
+ * vertices.  Leaves the last vertex off, so you can continue
+ * with another curve.
+ */
+static void
+bpts1(Plist *l, Point p0, Point p1, Point p2, Point p3, int scale)
+{
+	Point p01, p12, p23, p012, p123, p0123;
+	Point tp0, tp1, tp2, tp3;
+	tp0=divpt(p0, scale);
+	tp1=divpt(p1, scale);
+	tp2=divpt(p2, scale);
+	tp3=divpt(p3, scale);
+	if(psdist(tp1, tp0, tp3)<=1 && psdist(tp2, tp0, tp3)<=1){
+		appendpt(l, tp0);
+		appendpt(l, tp1);
+		appendpt(l, tp2);
+	}
+	else{
+		/*
+		 * if scale factor is getting too big for comfort,
+		 * rescale now & concede the rounding error
+		 */
+		if(scale>(1<<12)){
+			p0=tp0;
+			p1=tp1;
+			p2=tp2;
+			p3=tp3;
+			scale=1;
+		}
+		p01=addpt(p0, p1);
+		p12=addpt(p1, p2);
+		p23=addpt(p2, p3);
+		p012=addpt(p01, p12);
+		p123=addpt(p12, p23);
+		p0123=addpt(p012, p123);
+		bpts1(l, mulpt(p0, 8), mulpt(p01, 4), mulpt(p012, 2), p0123, scale*8);
+		bpts1(l, p0123, mulpt(p123, 2), mulpt(p23, 4), mulpt(p3, 8), scale*8);
+	}
+}
+
+static void
+bpts(Plist *l, Point p0, Point p1, Point p2, Point p3)
+{
+	bpts1(l, p0, p1, p2, p3, 1);
+}
+
+static void
+bezierpts(Plist *l, Point p0, Point p1, Point p2, Point p3)
+{
+	bpts(l, p0, p1, p2, p3);
+	appendpt(l, p3);
+}
+
+static void
+bezsplinepts(Plist *l, Point *pt, int npt)
+{
+	Point *p, *ep;
+	Point a, b, c, d;
+	int periodic;
+
+	if(npt<3)
+		return;
+	ep = &pt[npt-3];
+	periodic = eqpt(pt[0], ep[2]);
+	if(periodic){
+		a = divpt(addpt(ep[1], pt[0]), 2);
+		b = divpt(addpt(ep[1], mulpt(pt[0], 5)), 6);
+		c = divpt(addpt(mulpt(pt[0], 5), pt[1]), 6);
+		d = divpt(addpt(pt[0], pt[1]), 2);
+		bpts(l, a, b, c, d);
+	}
+	for(p=pt; p<=ep; p++){
+		if(p==pt && !periodic){
+			a = p[0];
+			b = divpt(addpt(p[0], mulpt(p[1], 2)), 3);
+		}
+		else{
+			a = divpt(addpt(p[0], p[1]), 2);
+			b = divpt(addpt(p[0], mulpt(p[1], 5)), 6);
+		}
+		if(p==ep && !periodic){
+			c = divpt(addpt(mulpt(p[1], 2), p[2]), 3);
+			d = p[2];
+		}
+		else{
+			c = divpt(addpt(mulpt(p[1], 5), p[2]), 6);
+			d = divpt(addpt(p[1], p[2]), 2);
+		}
+		bpts(l, a, b, c, d);
+	}
+	appendpt(l, d);
+}
+
+int
+getbezsplinepts(Point *pt, int npt, Point **pp)
+{
+	Plist l;
+	l.np = 0;
+	l.p = nil;
+	bezsplinepts(&l, pt, npt);
+	*pp  = l.p;
+	return l.np;
+}
+
+int
+bezier(Image *dst, Point p0, Point p1, Point p2, Point p3, int end0, int end1, int radius, Image *src, Point sp)
+{
+	return bezierop(dst, p0, p1, p2, p3, end0, end1, radius, src, sp, SoverD);
+}
+
+int
+bezierop(Image *dst, Point p0, Point p1, Point p2, Point p3, int end0, int end1, int radius, Image *src, Point sp, Drawop op)
+{
+	Plist l;
+
+	l.np = 0;
+	bezierpts(&l, p0, p1, p2, p3);
+	if(l.np == -1)
+		return 0;
+	if(l.np != 0){
+		polyop(dst, l.p, l.np, end0, end1, radius, src, addpt(subpt(sp, p0), l.p[0]), op);
+		free(l.p);
+	}
+	return 1;
+}
+
+int
+bezspline(Image *dst, Point *pt, int npt, int end0, int end1, int radius, Image *src, Point sp)
+{
+	return bezsplineop(dst, pt, npt, end0, end1, radius, src, sp, SoverD);
+}
+
+int
+bezsplineop(Image *dst, Point *pt, int npt, int end0, int end1, int radius, Image *src, Point sp, Drawop op)
+{
+	Plist l;
+
+	l.np = 0;
+	bezsplinepts(&l, pt, npt);
+	if(l.np==-1)
+		return 0;
+	if(l.np != 0){
+		polyop(dst, l.p, l.np, end0, end1, radius, src, addpt(subpt(sp, pt[0]), l.p[0]), op);
+		free(l.p);
+	}
+	return 1;
+}
+
+int
+fillbezier(Image *dst, Point p0, Point p1, Point p2, Point p3, int w, Image *src, Point sp)
+{
+	return fillbezierop(dst, p0, p1, p2, p3, w, src, sp, SoverD);
+}
+
+int
+fillbezierop(Image *dst, Point p0, Point p1, Point p2, Point p3, int w, Image *src, Point sp, Drawop op)
+{
+	Plist l;
+
+	l.np = 0;
+	bezierpts(&l, p0, p1, p2, p3);
+	if(l.np == -1)
+		return 0;
+	if(l.np != 0){
+		fillpolyop(dst, l.p, l.np, w, src, addpt(subpt(sp, p0), l.p[0]), op);
+		free(l.p);
+	}
+	return 1;
+}
+
+int
+fillbezspline(Image *dst, Point *pt, int npt, int w, Image *src, Point sp)
+{
+	return fillbezsplineop(dst, pt, npt, w, src, sp, SoverD);
+}
+
+int
+fillbezsplineop(Image *dst, Point *pt, int npt, int w, Image *src, Point sp, Drawop op)
+{
+	Plist l;
+
+	l.np = 0;
+	bezsplinepts(&l, pt, npt);
+	if(l.np == -1)
+		return 0;
+	if(l.np > 0){
+		fillpolyop(dst, l.p, l.np, w, src, addpt(subpt(sp, pt[0]), l.p[0]), op);
+		free(l.p);
+	}
+	return 1;
+}
diff --git a/libdraw/border.c b/libdraw/border.c
new file mode 100644
index 00000000..a75be159
--- /dev/null
+++ b/libdraw/border.c
@@ -0,0 +1,26 @@
+#include "lib9.h"
+#include "draw.h"
+
+void
+borderop(Image *im, Rectangle r, int i, Image *color, Point sp, Drawop op)
+{
+	if(i < 0){
+		r = insetrect(r, i);
+		sp = addpt(sp, Pt(i,i));
+		i = -i;
+	}
+	drawop(im, Rect(r.min.x, r.min.y, r.max.x, r.min.y+i),
+		color, nil, sp, op);
+	drawop(im, Rect(r.min.x, r.max.y-i, r.max.x, r.max.y),
+		color, nil, Pt(sp.x, sp.y+Dy(r)-i), op);
+	drawop(im, Rect(r.min.x, r.min.y+i, r.min.x+i, r.max.y-i),
+		color, nil, Pt(sp.x, sp.y+i), op);
+	drawop(im, Rect(r.max.x-i, r.min.y+i, r.max.x, r.max.y-i),
+		color, nil, Pt(sp.x+Dx(r)-i, sp.y+i), op);
+}
+
+void
+border(Image *im, Rectangle r, int i, Image *color, Point sp)
+{
+	borderop(im, r, i, color, sp, SoverD);
+}
diff --git a/libdraw/buildfont.c b/libdraw/buildfont.c
new file mode 100644
index 00000000..f86fdc81
--- /dev/null
+++ b/libdraw/buildfont.c
@@ -0,0 +1,142 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+static char*
+skip(char *s)
+{
+	while(*s==' ' || *s=='\n' || *s=='\t')
+		s++;
+	return s;
+}
+
+Font*
+buildfont(Display *d, char *buf, char *name)
+{
+	Font *fnt;
+	Cachefont *c;
+	char *s, *t;
+	ulong min, max;
+	int offset;
+	char badform[] = "bad font format: number expected (char position %d)";
+
+	s = buf;
+	fnt = malloc(sizeof(Font));
+	if(fnt == 0)
+		return 0;
+	memset(fnt, 0, sizeof(Font));
+	fnt->display = d;
+	fnt->name = strdup(name);
+	fnt->ncache = NFCACHE+NFLOOK;
+	fnt->nsubf = NFSUBF;
+	fnt->cache = malloc(fnt->ncache * sizeof(fnt->cache[0]));
+	fnt->subf = malloc(fnt->nsubf * sizeof(fnt->subf[0]));
+	if(fnt->name==0 || fnt->cache==0 || fnt->subf==0){
+    Err2:
+		free(fnt->name);
+		free(fnt->cache);
+		free(fnt->subf);
+		free(fnt->sub);
+		free(fnt);
+		return 0;
+	}
+	fnt->height = strtol(s, &s, 0);
+	s = skip(s);
+	fnt->ascent = strtol(s, &s, 0);
+	s = skip(s);
+	if(fnt->height<=0 || fnt->ascent<=0){
+		kwerrstr("bad height or ascent in font file");
+		goto Err2;
+	}
+	fnt->width = 0;
+	fnt->nsub = 0;
+	fnt->sub = 0;
+
+	memset(fnt->subf, 0, fnt->nsubf * sizeof(fnt->subf[0]));
+	memset(fnt->cache, 0, fnt->ncache*sizeof(fnt->cache[0]));
+	fnt->age = 1;
+	do{
+		/* must be looking at a number now */
+		if(*s<'0' || '9'<*s){
+			kwerrstr(badform, s-buf);
+			goto Err3;
+		}
+		min = strtol(s, &s, 0);
+		s = skip(s);
+		/* must be looking at a number now */
+		if(*s<'0' || '9'<*s){
+			kwerrstr(badform, s-buf);
+			goto Err3;
+		}
+		max = strtol(s, &s, 0);
+		s = skip(s);
+		if(*s==0 || min>=65536 || max>=65536 || min>max){
+			kwerrstr("illegal subfont range");
+    Err3:
+			freefont(fnt);
+			return 0;
+		}
+		t = s;
+		offset = strtol(s, &t, 0);
+		if(t>s && (*t==' ' || *t=='\t' || *t=='\n'))
+			s = skip(t);
+		else
+			offset = 0;
+		fnt->sub = realloc(fnt->sub, (fnt->nsub+1)*sizeof(Cachefont*));
+		if(fnt->sub == 0){
+			/* realloc manual says fnt->sub may have been destroyed */
+			fnt->nsub = 0;
+			goto Err3;
+		}
+		c = malloc(sizeof(Cachefont));
+		if(c == 0)
+			goto Err3;
+		fnt->sub[fnt->nsub] = c;
+		c->min = min;
+		c->max = max;
+		c->offset = offset;
+		t = s;
+		while(*s && *s!=' ' && *s!='\n' && *s!='\t')
+			s++;
+		*s++ = 0;
+		c->subfontname = 0;
+		c->name = strdup(t);
+		if(c->name == 0){
+			free(c);
+			goto Err3;
+		}
+		s = skip(s);
+		fnt->nsub++;
+	}while(*s);
+	return fnt;
+}
+
+void
+freefont(Font *f)
+{
+	int i;
+	Cachefont *c;
+	Subfont *s;
+
+	if(f == 0)
+		return;
+
+	for(i=0; i<f->nsub; i++){
+		c = f->sub[i];
+		free(c->subfontname);
+		free(c->name);
+		free(c);
+	}
+	for(i=0; i<f->nsubf; i++){
+		s = f->subf[i].f;
+/*		if(s && s!=display->defaultsubfont)*/	/* Plan 9 uses this */
+		if(s)
+			freesubfont(s);
+	}
+	freeimage(f->cacheimage);
+	free(f->name);
+	free(f->cache);
+	free(f->subf);
+	free(f->sub);
+	free(f);
+}
diff --git a/libdraw/bytesperline.c b/libdraw/bytesperline.c
new file mode 100644
index 00000000..4fbf7f5a
--- /dev/null
+++ b/libdraw/bytesperline.c
@@ -0,0 +1,30 @@
+#include "lib9.h"
+#include "draw.h"
+
+static
+int
+unitsperline(Rectangle r, int d, int bitsperunit)
+{
+	ulong l, t;
+
+	if(r.min.x >= 0){
+		l = (r.max.x*d+bitsperunit-1)/bitsperunit;
+		l -= (r.min.x*d)/bitsperunit;
+	}else{			/* make positive before divide */
+		t = (-r.min.x*d+bitsperunit-1)/bitsperunit;
+		l = t+(r.max.x*d+bitsperunit-1)/bitsperunit;
+	}
+	return l;
+}
+
+int
+wordsperline(Rectangle r, int d)
+{
+	return unitsperline(r, d, 8*sizeof(ulong));
+}
+
+int
+bytesperline(Rectangle r, int d)
+{
+	return unitsperline(r, d, 8);
+}
diff --git a/libdraw/chan.c b/libdraw/chan.c
new file mode 100644
index 00000000..96ec3268
--- /dev/null
+++ b/libdraw/chan.c
@@ -0,0 +1,76 @@
+#include "lib9.h"
+#include "draw.h"
+
+static char channames[] = "rgbkamx";
+char*
+chantostr(char *buf, ulong cc)
+{
+	ulong c, rc;
+	char *p;
+
+	if(chantodepth(cc) == 0)
+		return nil;
+
+	/* reverse the channel descriptor so we can easily generate the string in the right order */
+	rc = 0;
+	for(c=cc; c; c>>=8){
+		rc <<= 8;
+		rc |= c&0xFF;
+	}
+
+	p = buf;
+	for(c=rc; c; c>>=8) {
+		*p++ = channames[TYPE(c)];
+		*p++ = '0'+NBITS(c);
+	}
+	*p = 0;
+
+	return buf;
+}
+
+/* avoid pulling in ctype when using with drawterm etc. */
+static int
+isspace(char c)
+{
+	return c==' ' || c== '\t' || c=='\r' || c=='\n';
+}
+
+ulong
+strtochan(char *s)
+{
+	char *p, *q;
+	ulong c;
+	int t, n;
+
+	c = 0;
+	p=s;
+	while(*p && isspace(*p))
+		p++;
+
+	while(*p && !isspace(*p)){
+		if((q = strchr(channames, p[0])) == nil) 
+			return 0;
+		t = q-channames;
+		if(p[1] < '0' || p[1] > '9')
+			return 0;
+		n = p[1]-'0';
+		c = (c<<8) | __DC(t, n);
+		p += 2;
+	}
+	return c;
+}
+
+int
+chantodepth(ulong c)
+{
+	int n;
+
+	for(n=0; c; c>>=8){
+		if(TYPE(c) >= NChan || NBITS(c) > 8 || NBITS(c) <= 0)
+			return 0;
+		n += NBITS(c);
+	}
+	if(n==0 || (n>8 && n%8) || (n<8 && 8%n))
+		return 0;
+	return n;
+}
diff --git a/libdraw/cloadimage.c b/libdraw/cloadimage.c
new file mode 100644
index 00000000..5c8c792f
--- /dev/null
+++ b/libdraw/cloadimage.c
@@ -0,0 +1,49 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+int
+cloadimage(Image *i, Rectangle r, uchar *data, int ndata)
+{
+	int m, nb, miny, maxy, ncblock;
+	uchar *a;
+
+	if(!rectinrect(r, i->r)){
+		werrstr("cloadimage: bad rectangle");
+		return -1;
+	}
+
+	miny = r.min.y;
+	m = 0;
+	ncblock = _compblocksize(r, i->depth);
+	while(miny != r.max.y){
+		maxy = atoi((char*)data+0*12);
+		nb = atoi((char*)data+1*12);
+		if(maxy<=miny || r.max.y<maxy){
+			werrstr("creadimage: bad maxy %d", maxy);
+			return -1;
+		}
+		data += 2*12;
+		ndata -= 2*12;
+		m += 2*12;
+		if(nb<=0 || ncblock<nb || nb>ndata){
+			werrstr("creadimage: bad count %d", nb);
+			return -1;
+		}
+		a = bufimage(i->display, 21+nb);
+		if(a == nil)
+			return -1;
+		a[0] = 'Y';
+		BPLONG(a+1, i->id);
+		BPLONG(a+5, r.min.x);
+		BPLONG(a+9, miny);
+		BPLONG(a+13, r.max.x);
+		BPLONG(a+17, maxy);
+		memmove(a+21, data, nb);
+		miny = maxy;
+		data += nb;
+		ndata += nb;
+		m += nb;
+	}
+	return m;
+}
diff --git a/libdraw/computil.c b/libdraw/computil.c
new file mode 100644
index 00000000..3ec103b8
--- /dev/null
+++ b/libdraw/computil.c
@@ -0,0 +1,37 @@
+#include "lib9.h"
+#include "draw.h"
+
+/*
+ * compressed data are seuences of byte codes.  
+ * if the first byte b has the 0x80 bit set, the next (b^0x80)+1 bytes
+ * are data.  otherwise, it's two bytes specifying a previous string to repeat.
+ */
+void
+_twiddlecompressed(uchar *buf, int n)
+{
+	uchar *ebuf;
+	int j, k, c;
+
+	ebuf = buf+n;
+	while(buf < ebuf){
+		c = *buf++;
+		if(c >= 128){
+			k = c-128+1;
+			for(j=0; j<k; j++, buf++)
+				*buf ^= 0xFF;
+		}else
+			buf++;
+	}
+}
+
+int
+_compblocksize(Rectangle r, int depth)
+{
+	int bpl;
+
+	bpl = bytesperline(r, depth);
+	bpl = 2*bpl;	/* add plenty extra for blocking, etc. */
+	if(bpl < NCBLOCK)
+		return NCBLOCK;
+	return bpl;
+}
diff --git a/libdraw/creadimage.c b/libdraw/creadimage.c
new file mode 100644
index 00000000..b00726fd
--- /dev/null
+++ b/libdraw/creadimage.c
@@ -0,0 +1,116 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+Image *
+creadimage(Display *d, int fd, int dolock)
+{
+	char hdr[5*12+1];
+	Rectangle r;
+	int m, nb, miny, maxy, new, ldepth, ncblock;
+	uchar *buf, *a;
+	Image *i;
+	ulong chan;
+	int font;
+
+	font = dolock&2;
+	dolock &= 1;
+	if(libreadn(fd, hdr, 5*12) != 5*12)
+		return nil;
+
+	/*
+	 * distinguish new channel descriptor from old ldepth.
+	 * channel descriptors have letters as well as numbers,
+	 * while ldepths are a single digit formatted as %-11d.
+	 */
+	new = 0;
+	for(m=0; m<10; m++){
+		if(hdr[m] != ' '){
+			new = 1;
+			break;
+		}
+	}
+	if(hdr[11] != ' '){
+		kwerrstr("creadimage: bad format");
+		return nil;
+	}
+	if(new){
+		hdr[11] = '\0';
+		if((chan = strtochan(hdr)) == 0){
+			kwerrstr("creadimage: bad channel string %s", hdr);
+			return nil;
+		}
+	}else{
+		ldepth = ((int)hdr[10])-'0';
+		if(ldepth<0 || ldepth>3){
+			kwerrstr("creadimage: bad ldepth %d", ldepth);
+			return nil;
+		}
+		chan = drawld2chan[ldepth];
+	}
+	r.min.x=atoi(hdr+1*12);
+	r.min.y=atoi(hdr+2*12);
+	r.max.x=atoi(hdr+3*12);
+	r.max.y=atoi(hdr+4*12);
+	if(r.min.x>r.max.x || r.min.y>r.max.y){
+		kwerrstr("creadimage: bad rectangle");
+		return nil;
+	}
+
+	if(dolock)
+		dolock = lockdisplay(d);
+	i = allocimage(d, r, chan, 0, 0);
+	if(dolock)
+		unlockdisplay(d);
+	if(i == nil)
+		return nil;
+	ncblock = _compblocksize(r, i->depth);
+	buf = malloc(ncblock);
+	if(buf == nil)
+		goto Errout;
+	miny = r.min.y;
+	while(miny != r.max.y){
+		if(libreadn(fd, hdr, 2*12) != 2*12){
+		Errout:
+			if(dolock)
+				lockdisplay(d);
+		Erroutlock:
+			freeimage(i);
+			if(dolock)
+				unlockdisplay(d);
+			free(buf);
+			return nil;
+		}
+		maxy = atoi(hdr+0*12);
+		nb = atoi(hdr+1*12);
+		if(maxy<=miny || r.max.y<maxy){
+			kwerrstr("creadimage: bad maxy %d", maxy);
+			goto Errout;
+		}
+		if(nb<=0 || ncblock<nb){
+			kwerrstr("creadimage: bad count %d", nb);
+			goto Errout;
+		}
+		if(libreadn(fd, buf, nb)!=nb)
+			goto Errout;
+		if(dolock)
+			lockdisplay(d);
+		a = bufimage(i->display, 21+nb);
+		if(a == nil)
+			goto Erroutlock;
+		a[0] = 'Y';
+		BPLONG(a+1, i->id);
+		BPLONG(a+5, r.min.x);
+		BPLONG(a+9, miny);
+		BPLONG(a+13, r.max.x);
+		BPLONG(a+17, maxy);
+		if(!font&&!new)	/* old image: flip the data bits */
+			_twiddlecompressed(buf, nb);
+		memmove(a+21, buf, nb);
+		if(dolock)
+			unlockdisplay(d);
+		miny = maxy;
+	}
+	free(buf);
+	return i;
+}
diff --git a/libdraw/defont.c b/libdraw/defont.c
new file mode 100644
index 00000000..759cd7a5
--- /dev/null
+++ b/libdraw/defont.c
@@ -0,0 +1,401 @@
+#include "lib9.h"
+#include "draw.h"
+
+/*
+ * lucm/latin1.9, in uncompressed form
+ */
+uchar
+defontdata[] =
+{
+0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x30,0x20,0x20,0x20,0x20,0x20,
+0x20,0x20,0x20,0x20,0x20,0x20,0x30,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
+0x20,0x20,0x30,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x32,0x33,0x30,0x34,0x20,
+0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x31,0x35,0x20,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,
+0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x30,0x06,0x06,0x03,0x42,0x40,0x00,0x00,0x00,0x18,0x03,0x03,
+0x02,0x43,0x00,0x60,0x60,0x48,0x00,0x0d,0x0c,0x01,0x81,0x80,0xd0,0x90,0x00,0x00,
+0x18,0x01,0x81,0x81,0x40,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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+0x00,0x09,0x8b,0x08,0x02,0x0d,0x00,0x09,0x94,0x08,0x02,0x0d,0x00,0x09,0x9d,0x08,
+0x02,0x0d,0x00,0x09,0xa6,0x08,0x02,0x0d,0x00,0x09,0xaf,0x08,0x05,0x0c,0x00,0x09,
+0xb8,0x08,0x05,0x0d,0x00,0x09,0xc1,0x08,0x02,0x0d,0x00,0x09,0xca,0x08,0x02,0x0d,
+0x00,0x09,0xd3,0x08,0x02,0x0d,0x00,0x09,0xdc,0x08,0x02,0x0d,0x00,0x09,0xe5,0x08,
+0x02,0x0f,0x00,0x09,0xee,0x08,0x03,0x0f,0x00,0x09,0xf7,0x08,0x02,0x0f,0x00,0x09,
+0x00,0x09,0x00,0x00,0x00,0x00,
+};
+
+int	sizeofdefont = sizeof defontdata;
+
+void
+_unpackinfo(Fontchar *fc, uchar *p, int n)
+{
+	int j;
+
+	for(j=0;  j<=n;  j++){
+		fc->x = p[0]|(p[1]<<8);
+		fc->top = p[2];
+		fc->bottom = p[3];
+		fc->left = p[4];
+		fc->width = p[5];
+		fc++;
+		p += 6;
+	}
+}
diff --git a/libdraw/draw.c b/libdraw/draw.c
new file mode 100644
index 00000000..8fdc487f
--- /dev/null
+++ b/libdraw/draw.c
@@ -0,0 +1,68 @@
+#include "lib9.h"
+#include "draw.h"
+
+void
+_setdrawop(Display *d, Drawop op)
+{
+	uchar *a;
+
+	if(op != SoverD){
+		a = bufimage(d, 1+1);
+		if(a == 0)
+			return;
+		a[0] = 'O';
+		a[1] = op;
+	}
+}
+		
+static void
+draw1(Image *dst, Rectangle *r, Image *src, Point *p0, Image *mask, Point *p1, Drawop op)
+{
+	uchar *a;
+
+	_setdrawop(dst->display, op);
+
+	a = bufimage(dst->display, 1+4+4+4+4*4+2*4+2*4);
+	if(a == 0)
+		return;
+	if(src == nil)
+		src = dst->display->black;
+	if(mask == nil)
+		mask = dst->display->opaque;
+	a[0] = 'd';
+	BPLONG(a+1, dst->id);
+	BPLONG(a+5, src->id);
+	BPLONG(a+9, mask->id);
+	BPLONG(a+13, r->min.x);
+	BPLONG(a+17, r->min.y);
+	BPLONG(a+21, r->max.x);
+	BPLONG(a+25, r->max.y);
+	BPLONG(a+29, p0->x);
+	BPLONG(a+33, p0->y);
+	BPLONG(a+37, p1->x);
+	BPLONG(a+41, p1->y);
+}
+
+void
+draw(Image *dst, Rectangle r, Image *src, Image *mask, Point p1)
+{
+	draw1(dst, &r, src, &p1, mask, &p1, SoverD);
+}
+
+void
+drawop(Image *dst, Rectangle r, Image *src, Image *mask, Point p1, Drawop op)
+{
+	draw1(dst, &r, src, &p1, mask, &p1, op);
+}
+
+void
+gendraw(Image *dst, Rectangle r, Image *src, Point p0, Image *mask, Point p1)
+{
+	draw1(dst, &r, src, &p0, mask, &p1, SoverD);
+}
+
+void
+gendrawop(Image *dst, Rectangle r, Image *src, Point p0, Image *mask, Point p1, Drawop op)
+{
+	draw1(dst, &r, src, &p0, mask, &p1, op);
+}
diff --git a/libdraw/drawrepl.c b/libdraw/drawrepl.c
new file mode 100644
index 00000000..e1488e46
--- /dev/null
+++ b/libdraw/drawrepl.c
@@ -0,0 +1,22 @@
+#include "lib9.h"
+#include "draw.h"
+
+int
+drawreplxy(int min, int max, int x)
+{
+	int sx;
+
+	sx = (x-min)%(max-min);
+	if(sx < 0)
+		sx += max-min;
+	return sx+min;
+}
+
+Point
+drawrepl(Rectangle r, Point p)
+{
+	p.x = drawreplxy(r.min.x, r.max.x, p.x);
+	p.y = drawreplxy(r.min.y, r.max.y, p.y);
+	return p;
+}
+
diff --git a/libdraw/ellipse.c b/libdraw/ellipse.c
new file mode 100644
index 00000000..51a993ab
--- /dev/null
+++ b/libdraw/ellipse.c
@@ -0,0 +1,81 @@
+#include "lib9.h"
+#include "draw.h"
+
+static
+void
+doellipse(int cmd, Image *dst, Point *c, int xr, int yr, int thick, Image *src, Point *sp, int alpha, int phi, Drawop op)
+{
+	uchar *a;
+
+	_setdrawop(dst->display, op);
+
+	a = bufimage(dst->display, 1+4+4+2*4+4+4+4+2*4+2*4);
+	if(a == 0){
+		_drawprint(2, "image ellipse: %r\n");
+		return;
+	}
+	a[0] = cmd;
+	BPLONG(a+1, dst->id);
+	BPLONG(a+5, src->id);
+	BPLONG(a+9, c->x);
+	BPLONG(a+13, c->y);
+	BPLONG(a+17, xr);
+	BPLONG(a+21, yr);
+	BPLONG(a+25, thick);
+	BPLONG(a+29, sp->x);
+	BPLONG(a+33, sp->y);
+	BPLONG(a+37, alpha);
+	BPLONG(a+41, phi);
+}
+
+void
+ellipse(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp)
+{
+	doellipse('e', dst, &c, a, b, thick, src, &sp, 0, 0, SoverD);
+}
+
+void
+ellipseop(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, Drawop op)
+{
+	doellipse('e', dst, &c, a, b, thick, src, &sp, 0, 0, op);
+}
+
+void
+fillellipse(Image *dst, Point c, int a, int b, Image *src, Point sp)
+{
+	doellipse('E', dst, &c, a, b, 0, src, &sp, 0, 0, SoverD);
+}
+
+void
+fillellipseop(Image *dst, Point c, int a, int b, Image *src, Point sp, Drawop op)
+{
+	doellipse('E', dst, &c, a, b, 0, src, &sp, 0, 0, op);
+}
+
+void
+arc(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, int alpha, int phi)
+{
+	alpha |= 1<<31;
+	doellipse('e', dst, &c, a, b, thick, src, &sp, alpha, phi, SoverD);
+}
+
+void
+arcop(Image *dst, Point c, int a, int b, int thick, Image *src, Point sp, int alpha, int phi, Drawop op)
+{
+	alpha |= 1<<31;
+	doellipse('e', dst, &c, a, b, thick, src, &sp, alpha, phi, op);
+}
+
+void
+fillarc(Image *dst, Point c, int a, int b, Image *src, Point sp, int alpha, int phi)
+{
+	alpha |= 1<<31;
+	doellipse('E', dst, &c, a, b, 0, src, &sp, alpha, phi, SoverD);
+}
+
+void
+fillarcop(Image *dst, Point c, int a, int b, Image *src, Point sp, int alpha, int phi, Drawop op)
+{
+	alpha |= 1<<31;
+	doellipse('E', dst, &c, a, b, 0, src, &sp, alpha, phi, op);
+}
diff --git a/libdraw/font.c b/libdraw/font.c
new file mode 100644
index 00000000..f51804d2
--- /dev/null
+++ b/libdraw/font.c
@@ -0,0 +1,398 @@
+#include "lib9.h"
+#include "draw.h"
+
+static int	fontresize(Font*, int, int, int);
+static int	freeup(Font*);
+
+#define	PJW	0	/* use NUL==pjw for invisible characters */
+
+int
+cachechars(Font *f, char **ss, Rune **rr, ushort *cp, int max, int *wp, char **subfontname)
+{
+	int i, th, sh, h, ld, w, rw, wid, nc;
+	char *sp;
+	Rune r, *rp, vr;
+	ulong a;
+	Cacheinfo *c, *tc, *ec;
+
+	if(ss){
+		sp = *ss;
+		rp = (Rune*) L"";
+	}else{
+		sp = "";
+		rp = *rr;
+	}
+	wid = 0;
+	*subfontname = 0;
+	for(i=0; (*sp || *rp) && i<max; sp+=w, rp+=rw){
+		if(ss){
+			r = *(uchar*)sp;
+			if(r < Runeself)
+				w = 1;
+			else{
+				w = chartorune(&vr, sp);
+				r = vr;
+			}
+			rw = 0;
+		}else{
+			r = *rp;
+			w = 0;
+			rw = 1;
+		}
+
+		sh = (17 * (uint)r) & (f->ncache-NFLOOK-1);
+		c = &f->cache[sh];
+		ec = c+NFLOOK;
+		h = sh;
+		while(c < ec){
+			if(c->value==r && c->age)
+				goto Found;
+			c++;
+			h++;
+		}
+	
+		/*
+		 * Not found; toss out oldest entry
+		 */
+		a = ~0;
+		th = sh;
+		tc = &f->cache[th];
+		while(tc < ec){
+			if(tc->age < a){
+				a = tc->age;
+				h = th;
+				c = tc;
+			}
+			tc++;
+			th++;
+		}
+
+		if(a && (f->age-a)<500){	/* kicking out too recent; resize */
+			nc = 2*(f->ncache-NFLOOK) + NFLOOK;
+			if(nc <= MAXFCACHE){
+				if(i == 0)
+					fontresize(f, f->width, nc, f->maxdepth);
+				/* else flush first; retry will resize */
+				break;
+			}
+		}
+
+		if(c->age == f->age)	/* flush pending string output */
+			break;
+
+		ld = loadchar(f, r, c, h, i, subfontname);
+		if(ld <= 0){
+			if(ld == 0)
+				continue;
+			break;
+		}
+		c = &f->cache[h];	/* may have reallocated f->cache */
+	
+	    Found:
+		wid += c->width;
+		c->age = f->age;
+		cp[i] = h;
+		i++;
+	}
+	if(ss)
+		*ss = sp;
+	else
+		*rr = rp;
+	*wp = wid;
+	return i;
+}
+
+void
+agefont(Font *f)
+{
+	Cacheinfo *c, *ec;
+	Cachesubf *s, *es;
+
+	f->age++;
+	if(f->age == 65536){
+		/*
+		 * Renormalize ages
+		 */
+		c = f->cache;
+		ec = c+f->ncache;
+		while(c < ec){
+			if(c->age){
+				c->age >>= 2;
+				c->age++;
+			}
+			c++;
+		}
+		s = f->subf;
+		es = s+f->nsubf;
+		while(s < es){
+			if(s->age){
+				if(s->age<SUBFAGE && s->cf->name != nil){
+					/* clean up */
+/*					if(s->f != display->defaultsubfont) */	/* plan 9 uses this */
+					if(s->f)
+						freesubfont(s->f);
+					s->cf = nil;
+					s->f = nil;
+					s->age = 0;
+				}else{
+					s->age >>= 2;
+					s->age++;
+				}
+			}
+			s++;
+		}
+		f->age = (65536>>2) + 1;
+	}
+}
+
+static Subfont*
+cf2subfont(Cachefont *cf, Font *f)
+{
+	char *name;
+	Subfont *sf;
+	int depth;
+
+	name = cf->subfontname;
+	if(name == nil){
+		depth = 0;
+		if(f->display){
+			if(f->display->image)
+				depth = f->display->image->depth;
+		}
+		name = subfontname(cf->name, f->name, depth);
+		if(name == nil)
+			return nil;
+		cf->subfontname = name;
+	}
+	sf = lookupsubfont(f->display, name);
+	return sf;
+}
+
+/* return 1 if load succeeded, 0 if failed, -1 if must retry */
+int
+loadchar(Font *f, Rune r, Cacheinfo *c, int h, int noflush, char **subfontname)
+{
+	int i, oi, wid, top, bottom;
+	Rune pic;
+	Fontchar *fi;
+	Cachefont *cf;
+	Cachesubf *subf, *of;
+	uchar *b;
+
+	pic = r;
+    Again:
+	for(i=0; i<f->nsub; i++){
+		cf = f->sub[i];
+		if(cf->min<=pic && pic<=cf->max)
+			goto Found;
+	}
+    TryPJW:
+	if(pic != PJW){
+		pic = PJW;
+		goto Again;
+	}
+	return 0;
+
+    Found:
+	/*
+	 * Choose exact or oldest
+	 */
+	oi = 0;
+	subf = &f->subf[0];
+	for(i=0; i<f->nsubf; i++){
+		if(cf == subf->cf)
+			goto Found2;
+		if(subf->age < f->subf[oi].age)
+			oi = i;
+		subf++;
+	}
+	subf = &f->subf[oi];
+
+	if(subf->f){
+		if(f->age-subf->age>SUBFAGE || f->nsubf>MAXSUBF){
+    Toss:
+			/* ancient data; toss */
+			freesubfont(subf->f);
+			subf->cf = nil;
+			subf->f = nil;
+			subf->age = 0;
+		}else{				/* too recent; grow instead */
+			of = f->subf;
+			f->subf = malloc((f->nsubf+DSUBF)*sizeof *subf);
+			if(f->subf == nil){
+				f->subf = of;
+				goto Toss;
+			}
+			memmove(f->subf, of, (f->nsubf+DSUBF)*sizeof *subf);
+			memset(f->subf+f->nsubf, 0, DSUBF*sizeof *subf);
+			subf = &f->subf[f->nsubf];
+			f->nsubf += DSUBF;
+			free(of);
+		}
+	}
+	subf->age = 0;
+	subf->cf = nil;
+	subf->f = cf2subfont(cf, f);
+	if(subf->f == nil){
+		if(cf->subfontname == nil)
+			goto TryPJW;
+		*subfontname = cf->subfontname;
+		return -1;
+	}
+
+	subf->cf = cf;
+	if(subf->f->ascent > f->ascent){
+		/* should print something? this is a mistake in the font file */
+		/* must prevent c->top from going negative when loading cache */
+		Image *b;
+		int d, t;
+		d = subf->f->ascent - f->ascent;
+		b = subf->f->bits;
+		draw(b, b->r, b, nil, addpt(b->r.min, Pt(0, d)));
+		draw(b, Rect(b->r.min.x, b->r.max.y-d, b->r.max.x, b->r.max.y), f->display->black, nil, b->r.min);
+		for(i=0; i<subf->f->n; i++){
+			t = subf->f->info[i].top-d;
+			if(t < 0)
+				t = 0;
+			subf->f->info[i].top = t;
+			t = subf->f->info[i].bottom-d;
+			if(t < 0)
+				t = 0;
+			subf->f->info[i].bottom = t;
+		}
+		subf->f->ascent = f->ascent;
+	}
+
+    Found2:
+	subf->age = f->age;
+
+	pic += cf->offset;
+	if(pic-cf->min >= subf->f->n)
+		goto TryPJW;
+	fi = &subf->f->info[pic - cf->min];
+	if(fi->width == 0)
+		goto TryPJW;
+	wid = (fi+1)->x - fi->x;
+	if(f->width < wid || f->width == 0 || f->maxdepth < subf->f->bits->depth){
+		/*
+		 * Flush, free, reload (easier than reformatting f->b)
+		 */
+		if(noflush)
+			return -1;
+		if(f->width < wid)
+			f->width = wid;
+		if(f->maxdepth < subf->f->bits->depth)
+			f->maxdepth = subf->f->bits->depth;
+		i = fontresize(f, f->width, f->ncache, f->maxdepth);
+		if(i <= 0)
+			return i;
+		/* c is still valid as didn't reallocate f->cache */
+	}
+	c->value = r;
+	top = fi->top + (f->ascent-subf->f->ascent);
+	bottom = fi->bottom + (f->ascent-subf->f->ascent);
+	c->width = fi->width;
+	c->x = h*f->width;
+	c->left = fi->left;
+	flushimage(f->display, 0);	/* flush any pending errors */
+	if (f->cacheimage == 0)
+		return 0;
+	b = bufimage(f->display, 37);
+	if(b == 0)
+		return 0;
+	b[0] = 'l';
+	BPLONG(b+1, f->cacheimage->id);
+	BPLONG(b+5, subf->f->bits->id);
+	BPSHORT(b+9, c-f->cache);
+	BPLONG(b+11, c->x);
+	BPLONG(b+15, top);
+	BPLONG(b+19, c->x+((fi+1)->x-fi->x));
+	BPLONG(b+23, bottom);
+	BPLONG(b+27, fi->x);
+	BPLONG(b+31, fi->top);
+	b[35] = fi->left;
+	b[36] = fi->width;
+	return 1;
+}
+
+/* release all subfonts, return number freed */
+static
+int
+freeup(Font *f)
+{
+	Cachesubf *s, *es;
+	int nf;
+
+	if(f->sub[0]->name == nil)	/* font from mkfont; don't free */
+		return 0;
+	s = f->subf;
+	es = s+f->nsubf;
+	nf = 0;
+	while(s < es){
+		if(s->age){
+			freesubfont(s->f);
+			s->cf = nil;
+			s->f = nil;
+			s->age = 0;
+			nf++;
+		}
+		s++;
+	}
+	return nf;
+}
+
+/* return whether resize succeeded && f->cache is unchanged */
+static int
+fontresize(Font *f, int wid, int ncache, int depth)
+{
+	Cacheinfo *i;
+	int ret;
+	Image *new;
+	uchar *b;
+	Display *d;
+
+	ret = 0;
+	d = f->display;
+	if(depth <= 0)
+		depth = 1;
+
+	new = allocimage(d, Rect(0, 0, ncache*wid, f->height), CHAN1(CGrey, depth), 0, 0);
+	if(new == nil){
+		_drawprint(2, "font cache resize failed: %r\n");
+/*		abort(); */
+		goto Return;
+	}
+	flushimage(d, 0);	/* flush any pending errors */
+	b = bufimage(d, 1+4+4+1);
+	if(b == 0){
+		freeimage(new);
+		goto Return;
+	}
+	b[0] = 'i';
+	BPLONG(b+1, new->id);
+	BPLONG(b+5, ncache);
+	b[9] = f->ascent;
+	if(flushimage(d, 0) < 0){
+		_drawprint(2, "resize: init failed: %r\n");
+		freeimage(new);
+		goto Return;
+	}
+	freeimage(f->cacheimage);
+	f->cacheimage = new;
+	f->width = wid;
+	f->maxdepth = depth;
+	ret = 1;
+	if(f->ncache != ncache){
+		i = malloc(ncache*sizeof f->cache[0]);
+		if(i != nil){
+			ret = 0;
+			free(f->cache);
+			f->ncache = ncache;
+			f->cache = i;
+		}
+		/* else just wipe the cache clean and things will be ok */
+	}
+    Return:
+	memset(f->cache, 0, f->ncache*sizeof f->cache[0]);
+	return ret;
+}
diff --git a/libdraw/freesubfont.c b/libdraw/freesubfont.c
new file mode 100644
index 00000000..1063bb00
--- /dev/null
+++ b/libdraw/freesubfont.c
@@ -0,0 +1,16 @@
+#include "lib9.h"
+#include "draw.h"
+
+void
+freesubfont(Subfont *f)
+{
+	if(f == 0)
+		return;
+	f->ref--;
+	if(f->ref > 0)
+		return;
+	uninstallsubfont(f);
+	free(f->info);	/* note: f->info must have been malloc'ed! */
+	freeimage(f->bits);
+	free(f);
+}
diff --git a/libdraw/getdefont.c b/libdraw/getdefont.c
new file mode 100644
index 00000000..8a9e6355
--- /dev/null
+++ b/libdraw/getdefont.c
@@ -0,0 +1,59 @@
+#include "lib9.h"
+#include "draw.h"
+
+Subfont*
+getdefont(Display *d)
+{
+	char *hdr, *p;
+	int n;
+	Fontchar *fc;
+	Subfont *f;
+	int ld;
+	Rectangle r;
+	Image *i;
+
+	/*
+	 * make sure data is word-aligned.  this is true with Plan 9 compilers
+	 * but not in general.  the byte order is right because the data is
+	 * declared as char*, not ulong*.
+	 */
+	p = (char*)defontdata;
+	n = (ulong)p & 3;
+	if(n != 0){
+		memmove(p+(4-n), p, sizeofdefont-n);
+		p += 4-n;
+	}
+	ld = atoi(p+0*12);
+	r.min.x = atoi(p+1*12);
+	r.min.y = atoi(p+2*12);
+	r.max.x = atoi(p+3*12);
+	r.max.y = atoi(p+4*12);
+
+	i = allocimage(d, r, drawld2chan[ld], 0, 0);
+	if(i == 0)
+		return 0;
+
+	p += 5*12;
+	n = loadimage(i, r, (uchar*)p, (defontdata+sizeofdefont)-(uchar*)p);
+	if(n < 0){
+		freeimage(i);
+		return 0;
+	}
+
+	hdr = p+n;
+	n = atoi(hdr);
+	p = hdr+3*12;
+	fc = malloc(sizeof(Fontchar)*(n+1));
+	if(fc == 0){
+		freeimage(i);
+		return 0;
+	}
+	_unpackinfo(fc, (uchar*)p, n);
+	f = allocsubfont("*default*", n, atoi(hdr+12), atoi(hdr+24), fc, i);
+	if(f == 0){
+		freeimage(i);
+		free(fc);
+		return 0;
+	}
+	return f;
+}
diff --git a/libdraw/getsubfont.c b/libdraw/getsubfont.c
new file mode 100644
index 00000000..0208d634
--- /dev/null
+++ b/libdraw/getsubfont.c
@@ -0,0 +1,36 @@
+#include "lib9.h"
+#include "kernel.h"
+#include "draw.h"
+
+/*
+ * Default version: treat as file name
+ */
+
+Subfont*
+_getsubfont(Display *d, char *name)
+{
+	int fd;
+	Subfont *f;
+
+	fd = libopen(name, OREAD);
+		
+	if(fd < 0){
+		_drawprint(2, "getsubfont: can't open %s: %r\n", name);
+		return 0;
+	}
+	/*
+	 * unlock display so i/o happens with display released, unless
+	 * user is doing his own locking, in which case this could break things.
+	 * _getsubfont is called only from string.c and stringwidth.c,
+	 * which are known to be safe to have this done.
+	 */
+	if(d->local == 0)
+		unlockdisplay(d);
+	f = readsubfont(d, name, fd, d->local == 0);
+	if(d->local == 0)
+		lockdisplay(d);
+	if(f == 0)
+		_drawprint(2, "getsubfont: can't read %s: %r\n", name);
+	libclose(fd);
+	return f;
+}
diff --git a/libdraw/init.c b/libdraw/init.c
new file mode 100644
index 00000000..f7a8676c
--- /dev/null
+++ b/libdraw/init.c
@@ -0,0 +1,341 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+#include "interp.h"
+
+int	_drawdebug;
+
+enum {
+	CHECKLOCKING = 0
+};
+
+/*
+ * Attach, or possibly reattach, to window.
+ * If reattaching, maintain value of screen pointer.
+ */
+int
+gengetwindow(Display *d, char *winname, Image **winp, Screen **scrp, int ref)
+{
+	int n, fd;
+	char buf[64+1];
+	Image *image;
+
+	fd = libopen(winname, OREAD);
+	if(fd<0 || (n=libread(fd, buf, sizeof buf-1))<=0){
+		*winp = d->image;
+		assert(*winp && (*winp)->chan != 0);
+		return 1;
+	}
+	libclose(fd);
+	buf[n] = '\0';
+	if(*winp != nil){
+		_freeimage1(*winp);
+		freeimage((*scrp)->image);
+		freescreen(*scrp);
+		*scrp = nil;
+	}
+	image = namedimage(d, buf);
+	if(image == 0){
+		*winp = nil;
+		return -1;
+	}
+	assert(image->chan != 0);
+
+	*scrp = allocscreen(image, d->white, 0);
+	if(*scrp == nil){
+		*winp = nil;
+		return -1;
+	}
+
+	*winp = _allocwindow(*winp, *scrp, insetrect(image->r, Borderwidth), ref, DWhite);
+	if(*winp == nil)
+		return -1;
+	assert((*winp)->chan != 0);
+	return 1;
+}
+
+#define	NINFO	12*12
+
+Display*
+initdisplay(char *dev, char *win, void(*error)(Display*, char*))
+{
+	char buf[128], info[NINFO+1], *t;
+	int datafd, ctlfd, reffd;
+	Display *disp;
+	Image *image;
+	Dir *dir;
+	void *q;
+	ulong chan;
+
+	fmtinstall('P', Pfmt);
+	fmtinstall('R', Rfmt);
+	if(dev == 0)
+		dev = "/dev";
+	if(win == 0)
+		win = "/dev";
+	if(strlen(dev)>sizeof buf-25 || strlen(win)>sizeof buf-25){
+		kwerrstr("initdisplay: directory name too long");
+		return nil;
+	}
+	t = strdup(win);
+	if(t == nil)
+		return nil;
+
+	q = libqlalloc();
+	if(q == nil)
+		return nil;
+
+	sprint(buf, "%s/draw/new", dev);
+	ctlfd = libopen(buf, ORDWR);
+	if(ctlfd < 0){
+		if(libbind("#i", dev, MBEFORE) < 0){
+    Error1:
+			libqlfree(q);
+			free(t);
+			kwerrstr("initdisplay: %s: %r", buf);
+			return 0;
+		}
+		ctlfd = libopen(buf, ORDWR);
+	}
+	if(ctlfd < 0)
+		goto Error1;
+	if(libread(ctlfd, info, sizeof info) < NINFO){
+    Error2:
+		libclose(ctlfd);
+		goto Error1;
+	}
+
+	if((chan=strtochan(info+2*12)) == 0){
+		kwerrstr("bad channel in %s", buf);
+		goto Error2;
+	}
+
+	sprint(buf, "%s/draw/%d/data", dev, atoi(info+0*12));
+	datafd = libopen(buf, ORDWR);
+	if(datafd < 0)
+		goto Error2;
+	sprint(buf, "%s/draw/%d/refresh", dev, atoi(info+0*12));
+	reffd = libopen(buf, OREAD);
+	if(reffd < 0){
+    Error3:
+		libclose(datafd);
+		goto Error2;
+	}
+	strcpy(buf, "allocation failed");
+	disp = malloc(sizeof(Display));
+	if(disp == 0){
+    Error4:
+		libclose(reffd);
+		goto Error3;
+	}
+	image = malloc(sizeof(Image));
+	if(image == 0){
+    Error5:
+		free(disp);
+		goto Error4;
+	}
+	memset(image, 0, sizeof(Image));
+	memset(disp, 0, sizeof(Display));
+	image->display = disp;
+	image->id = 0;
+	image->chan = chan;
+	image->depth = chantodepth(chan);
+	image->repl = atoi(info+3*12);
+	image->r.min.x = atoi(info+4*12);
+	image->r.min.y = atoi(info+5*12);
+	image->r.max.x = atoi(info+6*12);
+	image->r.max.y = atoi(info+7*12);
+	image->clipr.min.x = atoi(info+8*12);
+	image->clipr.min.y = atoi(info+9*12);
+	image->clipr.max.x = atoi(info+10*12);
+	image->clipr.max.y = atoi(info+11*12);
+	disp->dirno = atoi(info+0*12);
+	disp->datachan = libfdtochan(datafd, ORDWR);
+	disp->refchan = libfdtochan(reffd, OREAD);
+	disp->ctlchan = libfdtochan(ctlfd, ORDWR);
+	if(disp->datachan == nil || disp->refchan == nil || disp->ctlchan == nil)
+		goto Error4;
+	disp->bufsize = Displaybufsize;	/* TO DO: iounit(datafd) */
+	if(disp->bufsize <= 0)
+		disp->bufsize = Displaybufsize;
+	if(disp->bufsize < 512){
+		kwerrstr("iounit %d too small", disp->bufsize);
+		goto Error5;
+	}
+	/* TO DO: allocate buffer */
+
+	libclose(datafd);
+	libclose(reffd);
+	disp->image = image;
+	disp->bufp = disp->buf;
+	disp->error = error;
+	disp->chan = image->chan;
+	disp->depth = image->depth;
+	disp->windir = t;
+	disp->devdir = strdup(dev);
+	disp->qlock = q;
+	libqlock(q);
+	disp->white = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DWhite);
+	disp->black = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DBlack);
+	disp->opaque = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DWhite);
+	disp->transparent = allocimage(disp, Rect(0, 0, 1, 1), GREY1, 1, DBlack);
+	if(disp->white == nil || disp->black == nil || disp->opaque == nil || disp->transparent == nil){
+		free(image);
+		free(disp->devdir);
+		free(disp->white);
+		free(disp->black);
+		libclose(ctlfd);
+		goto Error5;
+	}
+	if((dir = libdirfstat(ctlfd))!=nil && dir->type=='i'){
+		disp->local = 1;
+		disp->dataqid = dir->qid.path;
+	}
+	free(dir);
+	libclose(ctlfd);
+
+	if(CHECKLOCKING)
+		disp->local = 0;	/* force display locking even for local access */
+
+	assert(disp->chan != 0 && image->chan != 0);
+	return disp;
+}
+
+/*
+ * Call with d unlocked.
+ * Note that disp->defaultfont and defaultsubfont are not freed here.
+ */
+void
+closedisplay(Display *disp)
+{
+	int fd;
+	char buf[128];
+
+	if(disp == nil)
+		return;
+	libqlock(disp->qlock);
+	if(disp->oldlabel[0]){
+		snprint(buf, sizeof buf, "%s/label", disp->windir);
+		fd = libopen(buf, OWRITE);
+		if(fd >= 0){
+			libwrite(fd, disp->oldlabel, strlen(disp->oldlabel));
+			libclose(fd);
+		}
+	}
+
+	free(disp->devdir);
+	free(disp->windir);
+	freeimage(disp->white);
+	freeimage(disp->black);
+	freeimage(disp->opaque);
+	freeimage(disp->transparent);
+	free(disp->image);
+	libchanclose(disp->datachan);
+	libchanclose(disp->refchan);
+	libchanclose(disp->ctlchan);
+	/* should cause refresh slave to shut down */
+	libqunlock(disp->qlock);
+	libqlfree(disp->qlock);
+	free(disp);
+}
+
+int
+lockdisplay(Display *disp)
+{
+	if(disp->local)
+		return 0;
+	if(libqlowner(disp->qlock) != currun()){
+		libqlock(disp->qlock);
+		return 1;
+	}
+	return 0;
+}
+
+void
+unlockdisplay(Display *disp)
+{
+	if(disp->local)
+		return;
+	libqunlock(disp->qlock);
+}
+
+/* use static buffer to avoid stack bloat */
+int
+_drawprint(int fd, char *fmt, ...)
+{
+	int n;
+	va_list arg;
+	char buf[128];
+//	static QLock l;
+
+//	qlock(&l);
+	va_start(arg, fmt);
+	vseprint(buf, buf+sizeof buf, fmt, arg);
+	va_end(arg);
+	n = libwrite(fd, buf, strlen(buf));
+//	qunlock(&l);
+	return n;
+}
+
+#ifdef YYY
+void
+drawerror(Display *d, char *s)
+{
+	char err[ERRMAX];
+
+	if(d->error)
+		d->error(d, s);
+	else{
+		err[0] = 0;
+		errstr(err, sizeof err);
+		_drawprint(2, "draw: %s: %s\n", s, err);
+		exits(s);
+	}
+}
+
+static
+int
+doflush(Display *d)
+{
+	int n;
+
+	n = d->bufp-d->buf;
+	if(n <= 0)
+		return 1;
+
+	if(kchanio(d->datachan, d->buf, n, OWRITE) != n){
+		if(_drawdebug)
+			_drawprint(2, "flushimage fail: d=%p: %r\n", d); /**/
+		d->bufp = d->buf;	/* might as well; chance of continuing */
+		return -1;
+	}
+	d->bufp = d->buf;
+	return 1;
+}
+
+int
+flushimage(Display *d, int visible)
+{
+	if(visible)
+		*d->bufp++ = 'v';	/* one byte always reserved for this */
+	return doflush(d);
+}
+
+uchar*
+bufimage(Display *d, int n)
+{
+	uchar *p;
+
+	if(n<0 || n>Displaybufsize){
+		kwerrstr("bad count in bufimage");
+		return 0;
+	}
+	if(d->bufp+n > d->buf+Displaybufsize)
+		if(doflush(d) < 0)
+			return 0;
+	p = d->bufp;
+	d->bufp += n;
+	return p;
+}
+
+#endif
diff --git a/libdraw/line.c b/libdraw/line.c
new file mode 100644
index 00000000..32a1213d
--- /dev/null
+++ b/libdraw/line.c
@@ -0,0 +1,34 @@
+#include "lib9.h"
+#include "draw.h"
+
+void
+line(Image *dst, Point p0, Point p1, int end0, int end1, int radius, Image *src, Point sp)
+{
+	lineop(dst, p0, p1, end0, end1, radius, src, sp, SoverD);
+}
+
+void
+lineop(Image *dst, Point p0, Point p1, int end0, int end1, int radius, Image *src, Point sp, Drawop op)
+{
+	uchar *a;
+
+	_setdrawop(dst->display, op);
+
+	a = bufimage(dst->display, 1+4+2*4+2*4+4+4+4+4+2*4);
+	if(a == 0){
+		_drawprint(2, "image line: %r\n");
+		return;
+	}
+	a[0] = 'L';
+	BPLONG(a+1, dst->id);
+	BPLONG(a+5, p0.x);
+	BPLONG(a+9, p0.y);
+	BPLONG(a+13, p1.x);
+	BPLONG(a+17, p1.y);
+	BPLONG(a+21, end0);
+	BPLONG(a+25, end1);
+	BPLONG(a+29, radius);
+	BPLONG(a+33, src->id);
+	BPLONG(a+37, sp.x);
+	BPLONG(a+41, sp.y);
+}
diff --git a/libdraw/loadimage.c b/libdraw/loadimage.c
new file mode 100644
index 00000000..6c00a250
--- /dev/null
+++ b/libdraw/loadimage.c
@@ -0,0 +1,70 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+int
+loadimage(Image *i, Rectangle r, uchar *data, int ndata)
+{
+	long dy;
+	int n, bpl, roff, dstroff, lskip, llen, y;
+	uchar *a;
+	int chunk;
+	Rectangle dstr;
+
+	chunk = i->display->bufsize - 64;
+
+	bpl = bytesperline(r, i->depth);
+	n = bpl*Dy(r);
+	if(n > ndata){
+		kwerrstr("loadimage: insufficient data");
+		return -1;
+	}
+
+	dstr = r;
+	rectclip(&dstr, i->r);
+	rectclip(&dstr, i->clipr);
+
+	if (!rectinrect(dstr, i->r))
+		return 0;
+
+	roff = (r.min.x*i->depth)>>3;
+	dstroff = dstr.min.x * i->depth >> 3;
+	lskip = dstroff - roff;
+	llen = (dstr.max.x*i->depth + 7 >> 3) - dstroff;
+	data += (dstr.min.y - r.min.y) * bpl + lskip;
+
+	ndata = 0;
+	while(dstr.max.y > dstr.min.y){
+		dy = dstr.max.y - dstr.min.y;
+		if(dy*llen > chunk)
+			dy = chunk/llen;
+		if(dy <= 0){
+			kwerrstr("loadimage: image too wide for buffer");
+			return -1;
+		}
+		n = dy*llen;
+		a = bufimage(i->display, 21+n);
+		if(a == nil){
+			kwerrstr("bufimage failed");
+			return -1;
+		}
+		a[0] = 'y';
+		BPLONG(a+1, i->id);
+		BPLONG(a+5, dstr.min.x);
+		BPLONG(a+9, dstr.min.y);
+		BPLONG(a+13, dstr.max.x);
+		BPLONG(a+17, dstr.min.y+dy);
+		a += 21;
+		for (y = 0; y < dy; y++) {
+			memmove(a, data, llen);
+			a += llen;
+			ndata += llen;
+			data += bpl;
+		}
+		dstr.min.y += dy;
+	}
+	if(flushimage(i->display, 0) < 0)
+		return -1;
+	return ndata;
+}
+
diff --git a/libdraw/mkfile b/libdraw/mkfile
new file mode 100644
index 00000000..27cba37e
--- /dev/null
+++ b/libdraw/mkfile
@@ -0,0 +1,54 @@
+<../mkconfig
+
+LIB=libdraw.a
+
+OFILES=	alloc.$O\
+	allocimagemix.$O\
+	arith.$O\
+	bezier.$O\
+	border.$O\
+	buildfont.$O\
+	bytesperline.$O\
+	chan.$O\
+	cloadimage.$O\
+	computil.$O\
+	creadimage.$O\
+	defont.$O\
+	draw.$O\
+	drawrepl.$O\
+	ellipse.$O\
+	font.$O\
+	freesubfont.$O\
+	getdefont.$O\
+	getsubfont.$O\
+	init.$O\
+	line.$O\
+	mkfont.$O\
+	openfont.$O\
+	poly.$O\
+	loadimage.$O\
+	readcolmap.$O\
+	readimage.$O\
+	readsubfont.$O\
+	rectclip.$O\
+	replclipr.$O\
+	rgb.$O\
+	string.$O\
+	stringbg.$O\
+	stringsubfont.$O\
+	stringwidth.$O\
+	subfont.$O\
+	subfontcache.$O\
+	subfontname.$O\
+	unloadimage.$O\
+	window.$O\
+	writecolmap.$O\
+	writeimage.$O\
+	writesubfont.$O\
+
+HFILES=\
+	$ROOT/include/draw.h \
+	$ROOT/include/interp.h\
+
+<$ROOT/mkfiles/mksyslib-$SHELLTYPE
+
diff --git a/libdraw/mkfont.c b/libdraw/mkfont.c
new file mode 100644
index 00000000..cb982f46
--- /dev/null
+++ b/libdraw/mkfont.c
@@ -0,0 +1,54 @@
+#include "lib9.h"
+#include "draw.h"
+
+/*
+ * Cobble fake font using existing subfont
+ */
+Font*
+mkfont(Subfont *subfont, Rune min)
+{
+	Font *font;
+	Cachefont *c;
+
+	font = malloc(sizeof(Font));
+	if(font == 0)
+		return 0;
+	memset(font, 0, sizeof(Font));
+	font->display = subfont->bits->display;
+	font->name = strdup("<synthetic>");
+	font->ncache = NFCACHE+NFLOOK;
+	font->nsubf = NFSUBF;
+	font->cache = malloc(font->ncache * sizeof(font->cache[0]));
+	font->subf = malloc(font->nsubf * sizeof(font->subf[0]));
+	if(font->name==0 || font->cache==0 || font->subf==0){
+    Err:
+		free(font->name);
+		free(font->cache);
+		free(font->subf);
+		free(font->sub);
+		free(font);
+		return 0;
+	}
+	memset(font->cache, 0, font->ncache*sizeof(font->cache[0]));
+	memset(font->subf, 0, font->nsubf*sizeof(font->subf[0]));
+	font->height = subfont->height;
+	font->ascent = subfont->ascent;
+	font->age = 1;
+	font->sub = malloc(sizeof(Cachefont*));
+	if(font->sub == 0)
+		goto Err;
+	c = malloc(sizeof(Cachefont));
+	if(c == 0)
+		goto Err;
+	font->nsub = 1;
+	font->sub[0] = c;
+	c->min = min;
+	c->max = min+subfont->n-1;
+	c->offset = 0;
+	c->name = 0;	/* noticed by freeup() and agefont() */
+	c->subfontname = 0;
+	font->subf[0].age = 0;
+	font->subf[0].cf = c;
+	font->subf[0].f = subfont;
+	return font;
+}
diff --git a/libdraw/openfont.c b/libdraw/openfont.c
new file mode 100644
index 00000000..d2829d36
--- /dev/null
+++ b/libdraw/openfont.c
@@ -0,0 +1,37 @@
+#include "lib9.h"
+#include "kernel.h"
+#include "draw.h"
+
+Font*
+openfont(Display *d, char *name)
+{
+	Font *fnt;
+	int fd, i, n;
+	char *buf;
+	Dir *dir;
+
+	fd = libopen(name, OREAD);
+	if(fd < 0)
+		return 0;
+
+	if((dir = libdirfstat(fd)) == nil){
+    Err0:
+		libclose(fd);
+		return 0;
+	}
+	n = dir->length;
+	free(dir);
+	buf = malloc(n+1);
+	if(buf == 0)
+		goto Err0;
+	buf[n] = 0;
+	i = libreadn(fd, buf, n);
+	libclose(fd);
+	if(i != n){
+		free(buf);
+		return 0;
+	}
+	fnt = buildfont(d, buf, name);
+	free(buf);
+	return fnt;
+}
diff --git a/libdraw/poly.c b/libdraw/poly.c
new file mode 100644
index 00000000..ec643690
--- /dev/null
+++ b/libdraw/poly.c
@@ -0,0 +1,86 @@
+#include "lib9.h"
+#include "draw.h"
+
+static
+uchar*
+addcoord(uchar *p, int oldx, int newx)
+{
+	int dx;
+
+	dx = newx-oldx;
+	/* does dx fit in 7 signed bits? */
+	if((unsigned)(dx - -0x40) <= 0x7F)
+		*p++ = dx&0x7F;
+	else{
+		*p++ = 0x80 | (newx&0x7F);
+		*p++ = newx>>7;
+		*p++ = newx>>15;
+	}
+	return p;
+}
+
+static
+void
+dopoly(int cmd, Image *dst, Point *pp, int np, int end0, int end1, int radius, Image *src, Point *sp, Drawop op)
+{
+	uchar *a, *t, *u;
+	int i, ox, oy;
+
+	if(np == 0)
+		return;
+	t = malloc(np*2*3);
+	if(t == nil)
+		return;
+	u = t;
+	ox = oy = 0;
+	for(i=0; i<np; i++){
+		u = addcoord(u, ox, pp[i].x);
+		ox = pp[i].x;
+		u = addcoord(u, oy, pp[i].y);
+		oy = pp[i].y;
+	}
+
+	_setdrawop(dst->display, op);
+
+	a = bufimage(dst->display, 1+4+2+4+4+4+4+2*4+(u-t));
+	if(a == 0){
+		free(t);
+		_drawprint(2, "image poly: %r\n");
+		return;
+	}
+	a[0] = cmd;
+	BPLONG(a+1, dst->id);
+	BPSHORT(a+5, np-1);
+	BPLONG(a+7, end0);
+	BPLONG(a+11, end1);
+	BPLONG(a+15, radius);
+	BPLONG(a+19, src->id);
+	BPLONG(a+23, sp->x);
+	BPLONG(a+27, sp->y);
+	memmove(a+31, t, u-t);
+	free(t);
+}
+
+void
+poly(Image *dst, Point *p, int np, int end0, int end1, int radius, Image *src, Point sp)
+{
+	dopoly('p', dst, p, np, end0, end1, radius, src, &sp, SoverD);
+}
+
+void
+polyop(Image *dst, Point *p, int np, int end0, int end1, int radius, Image *src, Point sp, Drawop op)
+{
+	dopoly('p', dst, p, np, end0, end1, radius, src, &sp, op);
+}
+
+void
+fillpoly(Image *dst, Point *p, int np, int wind, Image *src, Point sp)
+{
+	dopoly('P', dst, p, np, wind, 0, 0, src, &sp, SoverD);
+}
+
+void
+fillpolyop(Image *dst, Point *p, int np, int wind, Image *src, Point sp, Drawop op)
+{
+	dopoly('P', dst, p, np, wind, 0, 0, src, &sp, op);
+}
diff --git a/libdraw/readcolmap.c b/libdraw/readcolmap.c
new file mode 100644
index 00000000..6bae5a24
--- /dev/null
+++ b/libdraw/readcolmap.c
@@ -0,0 +1,46 @@
+#include "lib9.h"
+#include "draw.h"
+#include "bio.h"
+
+static ulong
+getval(char **p)
+{
+	ulong v;
+	char *q;
+
+	v = strtoul(*p, &q, 0);
+	v |= v<<8;
+	v |= v<<16;
+	*p = q;
+	return v;
+}
+
+void
+readcolmap(Display *d, RGB *colmap)
+{
+	int i;
+	char *p, *q;
+	Biobuf *b;
+	char buf[128];
+
+	sprint(buf, "/dev/draw/%d/colormap", d->dirno);
+	b = Bopen(buf, OREAD);
+	if(b == 0)
+		drawerror(d, "rdcolmap: can't open colormap device");
+
+	for(;;) {
+		p = Brdline(b, '\n');
+		if(p == 0)
+			break;
+		i = strtoul(p, &q, 0);
+		if(i < 0 || i > 255) {
+			_drawprint(2, "rdcolmap: bad index\n");
+			exits("bad");
+		}
+		p = q;
+		colmap[255-i].red = getval(&p);
+		colmap[255-i].green = getval(&p);
+		colmap[255-i].blue = getval(&p);
+	}
+	Bterm(b);
+}
diff --git a/libdraw/readimage.c b/libdraw/readimage.c
new file mode 100644
index 00000000..3d74b15e
--- /dev/null
+++ b/libdraw/readimage.c
@@ -0,0 +1,123 @@
+#include "lib9.h"
+#include "kernel.h"
+#include "draw.h"
+
+Image*
+readimage(Display *d, int fd, int dolock)
+{
+	char hdr[5*12+1];
+	int dy;
+	int new;
+	uint l, n;
+	int m, j, chunk;
+	int miny, maxy;
+	Rectangle r;
+	int ldepth;
+	ulong chan;
+	uchar *tmp;
+	Image *i;
+
+	if(libreadn(fd, hdr, 11) != 11) {
+		kwerrstr("readimage: short header");
+		return nil;
+	}
+	if(memcmp(hdr, "compressed\n", 11) == 0)
+		return creadimage(d, fd, dolock);
+	dolock &= 1;
+	if(libreadn(fd, hdr+11, 5*12-11) != 5*12-11) {
+		kwerrstr("readimage: short header");
+		return nil;
+	}
+	chunk = d->bufsize - 32;	/* a little room for header */
+
+	/*
+	 * distinguish new channel descriptor from old ldepth.
+	 * channel descriptors have letters as well as numbers,
+	 * while ldepths are a single digit formatted as %-11d.
+	 */
+	new = 0;
+	for(m=0; m<10; m++){
+		if(hdr[m] != ' '){
+			new = 1;
+			break;
+		}
+	}
+	if(hdr[11] != ' '){
+		kwerrstr("readimage: bad format");
+		return nil;
+	}
+	if(new){
+		hdr[11] = '\0';
+		if((chan = strtochan(hdr)) == 0){
+			kwerrstr("readimage: bad channel string %s", hdr);
+			return nil;
+		}
+	}else{
+		ldepth = ((int)hdr[10])-'0';
+		if(ldepth<0 || ldepth>3){
+			kwerrstr("readimage: bad ldepth %d", ldepth);
+			return nil;
+		}
+		chan = drawld2chan[ldepth];
+	}
+
+	r.min.x = atoi(hdr+1*12);
+	r.min.y = atoi(hdr+2*12);
+	r.max.x = atoi(hdr+3*12);
+	r.max.y = atoi(hdr+4*12);
+	if(r.min.x>r.max.x || r.min.y>r.max.y){
+		kwerrstr("readimage: bad rectangle");
+		return nil;
+	}
+
+	miny = r.min.y;
+	maxy = r.max.y;
+
+	l = bytesperline(r, chantodepth(chan));
+	if(dolock)
+		dolock = lockdisplay(d);
+	i = allocimage(d, r, chan, 0, -1);
+	if(dolock)
+		unlockdisplay(d);
+	if(i == nil)
+		return nil;
+	tmp = malloc(chunk);
+	if(tmp == nil)
+		goto Err;
+	while(maxy > miny){
+		dy = maxy - miny;
+		if(dy*l > chunk)
+			dy = chunk/l;
+		if(dy <= 0){
+			kwerrstr("readimage: image too wide for buffer");
+			goto Err;
+		}
+		n = dy*l;
+		m = libreadn(fd, tmp, n);
+		if(m != n){
+			kwerrstr("readimage: read count %d not %d: %r", m, n);
+   Err:
+			if(dolock)
+				lockdisplay(d);
+   Err1:
+ 			freeimage(i);
+			if(dolock)
+				unlockdisplay(d);
+			free(tmp);
+			return nil;
+		}
+		if(!new)	/* an old image: must flip all the bits */
+			for(j=0; j<chunk; j++)
+				tmp[j] ^= 0xFF;
+
+		if(dolock)
+			lockdisplay(d);
+		if(loadimage(i, Rect(r.min.x, miny, r.max.x, miny+dy), tmp, chunk) <= 0)
+			goto Err1;
+		if(dolock)
+			unlockdisplay(d);
+		miny += dy;
+	}
+	free(tmp);
+	return i;
+}
diff --git a/libdraw/readsubfont.c b/libdraw/readsubfont.c
new file mode 100644
index 00000000..50933b7d
--- /dev/null
+++ b/libdraw/readsubfont.c
@@ -0,0 +1,58 @@
+#include "lib9.h"
+#include "kernel.h"
+#include "draw.h"
+
+Subfont*
+readsubfonti(Display*d, char *name, int fd, Image *ai, int dolock)
+{
+	char hdr[3*12+4+1];
+	int n;
+	uchar *p;
+	Fontchar *fc;
+	Subfont *f;
+	Image *i;
+
+	i = ai;
+	if(i == nil){
+		i = readimage(d, fd, dolock|2);
+		if(i == nil)
+			return nil;
+	}
+	if(libreadn(fd, hdr, 3*12) != 3*12){
+		if(ai == nil)
+			freeimage(i);
+		kwerrstr("rdsubfonfile: header read error: %r");
+		return nil;
+	}
+	n = atoi(hdr);
+	p = malloc(6*(n+1));
+	if(p == nil)
+		return nil;
+	if(libreadn(fd, p, 6*(n+1)) != 6*(n+1)){
+		kwerrstr("rdsubfonfile: fontchar read error: %r");
+    Err:
+		free(p);
+		return nil;
+	}
+	fc = malloc(sizeof(Fontchar)*(n+1));
+	if(fc == nil)
+		goto Err;
+	_unpackinfo(fc, p, n);
+	if(dolock)
+		lockdisplay(d);
+	f = allocsubfont(name, n, atoi(hdr+12), atoi(hdr+24), fc, i);
+	if(dolock)
+		unlockdisplay(d);
+	if(f == nil){
+		free(fc);
+		goto Err;
+	}
+	free(p);
+	return f;
+}
+
+Subfont*
+readsubfont(Display*d, char *name, int fd, int dolock)
+{
+	return readsubfonti(d, name, fd, nil, dolock);
+}
diff --git a/libdraw/rectclip.c b/libdraw/rectclip.c
new file mode 100644
index 00000000..740c7c4b
--- /dev/null
+++ b/libdraw/rectclip.c
@@ -0,0 +1,24 @@
+#include "lib9.h"
+#include "draw.h"
+
+int
+rectclip(Rectangle *rp, Rectangle b)		/* first by reference, second by value */
+{
+	Rectangle *bp = &b;
+	/*
+	 * Expand rectXrect() in line for speed
+	 */
+	if((rp->min.x<bp->max.x && bp->min.x<rp->max.x &&
+	    rp->min.y<bp->max.y && bp->min.y<rp->max.y)==0)
+		return 0;
+	/* They must overlap */
+	if(rp->min.x < bp->min.x)
+		rp->min.x = bp->min.x;
+	if(rp->min.y < bp->min.y)
+		rp->min.y = bp->min.y;
+	if(rp->max.x > bp->max.x)
+		rp->max.x = bp->max.x;
+	if(rp->max.y > bp->max.y)
+		rp->max.y = bp->max.y;
+	return 1;
+}
diff --git a/libdraw/replclipr.c b/libdraw/replclipr.c
new file mode 100644
index 00000000..b3f0085f
--- /dev/null
+++ b/libdraw/replclipr.c
@@ -0,0 +1,24 @@
+#include "lib9.h"
+#include "draw.h"
+
+void
+replclipr(Image *i, int repl, Rectangle clipr)
+{
+	uchar *b;
+
+	b = bufimage(i->display, 22);
+	if (b == 0) {
+		_drawprint(2, "replclipr: no bufimage\n");
+		return;
+	}
+	b[0] = 'c';
+	BPLONG(b+1, i->id);
+	repl = repl!=0;
+	b[5] = repl;
+	BPLONG(b+6, clipr.min.x);
+	BPLONG(b+10, clipr.min.y);
+	BPLONG(b+14, clipr.max.x);
+	BPLONG(b+18, clipr.max.y);
+	i->repl = repl;
+	i->clipr = clipr;
+}
diff --git a/libdraw/rgb.c b/libdraw/rgb.c
new file mode 100644
index 00000000..7ae0df77
--- /dev/null
+++ b/libdraw/rgb.c
@@ -0,0 +1,98 @@
+#include "lib9.h"
+#include "draw.h"
+
+/*
+ * This original version, although fast and a true inverse of
+ * cmap2rgb, in the sense that rgb2cmap(cmap2rgb(c))
+ * returned the original color, does a terrible job for RGB
+ * triples that do not appear in the color map, so it has been
+ * replaced by the much slower version below, that loops
+ * over the color map looking for the nearest point in RGB
+ * space.  There is no visual psychology reason for that
+ * criterion, but it's easy to implement and the results are
+ * far more pleasing. 
+ *
+int
+rgb2cmap(int cr, int cg, int cb)
+{
+	int r, g, b, v, cv;
+
+	if(cr < 0)
+		cr = 0;
+	else if(cr > 255)
+		cr = 255;
+	if(cg < 0)
+		cg = 0;
+	else if(cg > 255)
+		cg = 255;
+	if(cb < 0)
+		cb = 0;
+	else if(cb > 255)
+		cb = 255;
+	r = cr>>6;
+	g = cg>>6;
+	b = cb>>6;
+	cv = cr;
+	if(cg > cv)
+		cv = cg;
+	if(cb > cv)
+		cv = cb;
+	v = (cv>>4)&3;
+	return ((((r<<2)+v)<<4)+(((g<<2)+b+v-r)&15));
+}
+*/
+
+int
+rgb2cmap(int cr, int cg, int cb)
+{
+	int i, r, g, b, sq;
+	ulong rgb;
+	int best, bestsq;
+
+	best = 0;
+	bestsq = 0x7FFFFFFF;
+	for(i=0; i<256; i++){
+		rgb = cmap2rgb(i);
+		r = (rgb>>16) & 0xFF;
+		g = (rgb>>8) & 0xFF;
+		b = (rgb>>0) & 0xFF;
+		sq = (r-cr)*(r-cr)+(g-cg)*(g-cg)+(b-cb)*(b-cb);
+		if(sq < bestsq){
+			bestsq = sq;
+			best = i;
+		}
+	}
+	return best;
+}
+
+int
+cmap2rgb(int c)
+{
+	int j, num, den, r, g, b, v, rgb;
+
+	r = c>>6;
+	v = (c>>4)&3;
+	j = (c-v+r)&15;
+	g = j>>2;
+	b = j&3;
+	den=r;
+	if(g>den)
+		den=g;
+	if(b>den)
+		den=b;
+	if(den==0) {
+		v *= 17;
+		rgb = (v<<16)|(v<<8)|v;
+	}
+	else{
+		num=17*(4*den+v);
+		rgb = ((r*num/den)<<16)|((g*num/den)<<8)|(b*num/den);
+	}
+	return rgb;
+}
+
+int
+cmap2rgba(int c)
+{
+	return (cmap2rgb(c)<<8)|0xFF;
+}
diff --git a/libdraw/string.c b/libdraw/string.c
new file mode 100644
index 00000000..7ef21f1a
--- /dev/null
+++ b/libdraw/string.c
@@ -0,0 +1,136 @@
+#include "lib9.h"
+#include "draw.h"
+
+enum
+{
+	Max = 100
+};
+
+Point
+string(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s)
+{
+	return _string(dst, pt, src, sp, f, s, nil, 1<<24, dst->clipr, nil, ZP, SoverD);
+}
+
+Point
+stringop(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, Drawop op)
+{
+	return _string(dst, pt, src, sp, f, s, nil, 1<<24, dst->clipr, nil, ZP, op);
+}
+
+Point
+stringn(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, int len)
+{
+	return _string(dst, pt, src, sp, f, s, nil, len, dst->clipr, nil, ZP, SoverD);
+}
+
+Point
+stringnop(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, int len, Drawop op)
+{
+	return _string(dst, pt, src, sp, f, s, nil, len, dst->clipr, nil, ZP, op);
+}
+
+Point
+runestring(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r)
+{
+	return _string(dst, pt, src, sp, f, nil, r, 1<<24, dst->clipr, nil, ZP, SoverD);
+}
+
+Point
+runestringop(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, Drawop op)
+{
+	return _string(dst, pt, src, sp, f, nil, r, 1<<24, dst->clipr, nil, ZP, op);
+}
+
+Point
+runestringn(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, int len)
+{
+	return _string(dst, pt, src, sp, f, nil, r, len, dst->clipr, nil, ZP, SoverD);
+}
+
+Point
+runestringnop(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, int len, Drawop op)
+{
+	return _string(dst, pt, src, sp, f, nil, r, len, dst->clipr, nil, ZP, op);
+}
+
+Point
+_string(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, Rune *r, int len, Rectangle clipr, Image *bg, Point bgp, Drawop op)
+{
+	int m, n, wid, max;
+	ushort cbuf[Max], *c, *ec;
+	uchar *b;
+	char *subfontname;
+	char **sptr;
+	Rune **rptr;
+	Font *def;
+
+	if(s == nil){
+		s = "";
+		sptr = nil;
+	}else
+		sptr = &s;
+	if(r == nil){
+		r = (Rune*) L"";
+		rptr = nil;
+	}else
+		rptr = &r;
+	while((*s || *r) && len){
+		max = Max;
+		if(len < max)
+			max = len;
+		n = cachechars(f, sptr, rptr, cbuf, max, &wid, &subfontname);
+		if(n > 0){
+			_setdrawop(dst->display, op);
+
+			m = 47+2*n;
+			if(bg)
+				m += 4+2*4;
+			b = bufimage(dst->display, m);
+			if(b == 0){
+				_drawprint(2, "string: %r\n");
+				break;
+			}
+			if(bg)
+				b[0] = 'x';
+			else
+				b[0] = 's';
+			BPLONG(b+1, dst->id);
+			BPLONG(b+5, src->id);
+			BPLONG(b+9, f->cacheimage->id);
+			BPLONG(b+13, pt.x);
+			BPLONG(b+17, pt.y+f->ascent);
+			BPLONG(b+21, clipr.min.x);
+			BPLONG(b+25, clipr.min.y);
+			BPLONG(b+29, clipr.max.x);
+			BPLONG(b+33, clipr.max.y);
+			BPLONG(b+37, sp.x);
+			BPLONG(b+41, sp.y);
+			BPSHORT(b+45, n);
+			b += 47;
+			if(bg){
+				BPLONG(b, bg->id);
+				BPLONG(b+4, bgp.x);
+				BPLONG(b+8, bgp.y);
+				b += 12;
+			}
+			ec = &cbuf[n];
+			for(c=cbuf; c<ec; c++, b+=2)
+				BPSHORT(b, *c);
+			pt.x += wid;
+			bgp.x += wid;
+			agefont(f);
+			len -= n;
+		}
+		if(subfontname){
+			if(_getsubfont(f->display, subfontname) == 0){
+				def = f->display->defaultfont;
+				if(def && f!=def)
+					f = def;
+				else
+					break;
+			}
+		}
+	}
+	return pt;
+}
diff --git a/libdraw/stringbg.c b/libdraw/stringbg.c
new file mode 100644
index 00000000..1ec4b093
--- /dev/null
+++ b/libdraw/stringbg.c
@@ -0,0 +1,50 @@
+#include "lib9.h"
+#include "draw.h"
+
+Point
+stringbg(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, Image *bg, Point bgp)
+{
+	return _string(dst, pt, src, sp, f, s, nil, 1<<24, dst->clipr, bg, bgp, SoverD);
+}
+
+Point
+stringbgop(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, Image *bg, Point bgp, Drawop op)
+{
+	return _string(dst, pt, src, sp, f, s, nil, 1<<24, dst->clipr, bg, bgp, op);
+}
+
+Point
+stringnbg(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, int len, Image *bg, Point bgp)
+{
+	return _string(dst, pt, src, sp, f, s, nil, len, dst->clipr, bg, bgp, SoverD);
+}
+
+Point
+stringnbgop(Image *dst, Point pt, Image *src, Point sp, Font *f, char *s, int len, Image *bg, Point bgp, Drawop op)
+{
+	return _string(dst, pt, src, sp, f, s, nil, len, dst->clipr, bg, bgp, op);
+}
+
+Point
+runestringbg(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, Image *bg, Point bgp)
+{
+	return _string(dst, pt, src, sp, f, nil, r, 1<<24, dst->clipr, bg, bgp, SoverD);
+}
+
+Point
+runestringbgop(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, Image *bg, Point bgp, Drawop op)
+{
+	return _string(dst, pt, src, sp, f, nil, r, 1<<24, dst->clipr, bg, bgp, op);
+}
+
+Point
+runestringnbg(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, int len, Image *bg, Point bgp)
+{
+	return _string(dst, pt, src, sp, f, nil, r, len, dst->clipr, bg, bgp, SoverD);
+}
+
+Point
+runestringnbgop(Image *dst, Point pt, Image *src, Point sp, Font *f, Rune *r, int len, Image *bg, Point bgp, Drawop op)
+{
+	return _string(dst, pt, src, sp, f, nil, r, len, dst->clipr, bg, bgp, op);
+}
diff --git a/libdraw/stringsubfont.c b/libdraw/stringsubfont.c
new file mode 100644
index 00000000..a96ab5d1
--- /dev/null
+++ b/libdraw/stringsubfont.c
@@ -0,0 +1,64 @@
+#include "lib9.h"
+#include "draw.h"
+
+Point
+stringsubfont(Image *b, Point p, Image *color, Subfont *f, char *cs)
+{
+	int w, width;
+	uchar *s;
+	Rune c;
+	Fontchar *i;
+
+	s = (uchar*)cs;
+	for(; c=*s; p.x+=width){
+		width = 0;
+		if(c < Runeself)
+			s++;
+		else{
+			w = chartorune(&c, (char*)s);
+			if(w == 0){
+				s++;
+				continue;
+			}
+			s += w;
+		}
+		if(c >= f->n)
+			continue;
+		i = f->info+c;
+		width = i->width;
+		draw(b, Rect(p.x+i->left, p.y+i->top, p.x+i->left+(i[1].x-i[0].x), p.y+i->bottom),
+			color, f->bits, Pt(i->x, i->top));
+	}
+	return p;
+}
+
+Point
+strsubfontwidth(Subfont *f, char *cs)
+{
+	Rune c;
+	Point p;
+	uchar *s;
+	Fontchar *i;
+	int w, width;
+
+	p = Pt(0, f->height);
+	s = (uchar*)cs;
+	for(; c=*s; p.x+=width){
+		width = 0;
+		if(c < Runeself)
+			s++;
+		else{
+			w = chartorune(&c, (char*)s);
+			if(w == 0){
+				s++;
+				continue;
+			}
+			s += w;
+		}
+		if(c >= f->n)
+			continue;
+		i = f->info+c;
+		width = i->width;
+	}
+	return p;
+}
diff --git a/libdraw/stringwidth.c b/libdraw/stringwidth.c
new file mode 100644
index 00000000..5dc2167f
--- /dev/null
+++ b/libdraw/stringwidth.c
@@ -0,0 +1,96 @@
+#include "lib9.h"
+#include "draw.h"
+
+int
+_stringnwidth(Font *f, char *s, Rune *r, int len)
+{
+	int wid, twid, n, max, l;
+	char *name;
+	enum { Max = 64 };
+	ushort cbuf[Max];
+	Rune rune, **rptr;
+	char *subfontname, **sptr;
+	Font *def;
+	static Rune rnull;
+
+	if(s == nil){
+		s = "";
+		sptr = nil;
+	}else
+		sptr = &s;
+	if(r == nil){
+		r = &rnull;
+		rptr = nil;
+	}else
+		rptr = &r;
+	twid = 0;
+	while(len>0 && (*s || *r)){
+		max = Max;
+		if(len < max)
+			max = len;
+		n = 0;
+		while((l = cachechars(f, sptr, rptr, cbuf, max, &wid, &subfontname)) <= 0){
+			if(++n > 10){
+				if(*r)
+					rune = *r;
+				else
+					chartorune(&rune, s);
+				if(f->name != nil)
+					name = f->name;
+				else
+					name = "unnamed font";
+				_drawprint(2, "stringwidth: bad character set for rune 0x%.4ux in %s\n", rune, name);
+				return twid;
+			}
+			if(subfontname){
+				if(_getsubfont(f->display, subfontname) == 0){
+					def = f->display->defaultfont;
+					if(def && f!=def)
+						f = def;
+					else
+						break;
+				}
+			}
+		}
+		agefont(f);
+		twid += wid;
+		len -= l;
+	}
+	return twid;
+}
+
+int
+stringnwidth(Font *f, char *s, int len)
+{
+	return _stringnwidth(f, s, nil, len);
+}
+
+int
+stringwidth(Font *f, char *s)
+{
+	return _stringnwidth(f, s, nil, 1<<24);
+}
+
+Point
+stringsize(Font *f, char *s)
+{
+	return Pt(_stringnwidth(f, s, nil, 1<<24), f->height);
+}
+
+int
+runestringnwidth(Font *f, Rune *r, int len)
+{
+	return _stringnwidth(f, nil, r, len);
+}
+
+int
+runestringwidth(Font *f, Rune *r)
+{
+	return _stringnwidth(f, nil, r, 1<<24);
+}
+
+Point
+runestringsize(Font *f, Rune *r)
+{
+	return Pt(_stringnwidth(f, nil, r, 1<<24), f->height);
+}
diff --git a/libdraw/subfont.c b/libdraw/subfont.c
new file mode 100644
index 00000000..7f70a4f2
--- /dev/null
+++ b/libdraw/subfont.c
@@ -0,0 +1,27 @@
+#include "lib9.h"
+#include "draw.h"
+
+Subfont*
+allocsubfont(char *name, int n, int height, int ascent, Fontchar *info, Image *i)
+{
+	Subfont *f;
+
+	assert(height != 0 /* allocsubfont */);
+
+	f = malloc(sizeof(Subfont));
+	if(f == 0)
+		return 0;
+	f->n = n;
+	f->height = height;
+	f->ascent = ascent;
+	f->info = info;
+	f->bits = i;
+	f->ref = 1;
+	if(name){
+		f->name = strdup(name);
+		if(lookupsubfont(i->display, name) == 0)
+			installsubfont(name, f);
+	}else
+		f->name = 0;
+	return f;
+}
diff --git a/libdraw/subfontcache.c b/libdraw/subfontcache.c
new file mode 100644
index 00000000..fb5c11f4
--- /dev/null
+++ b/libdraw/subfontcache.c
@@ -0,0 +1,38 @@
+#include "lib9.h"
+#include "draw.h"
+
+/*
+ * Easy versions of the cache routines; may be substituted by fancier ones for other purposes
+ */
+
+static char	*lastname;
+Subfont	*lastsubfont;
+
+Subfont*
+lookupsubfont(Display *d, char *name)
+{
+	if(strcmp(name, "*default*") == 0)
+		return d->defaultsubfont;
+	if(lastname && strcmp(name, lastname)==0 && d==lastsubfont->bits->display){
+		lastsubfont->ref++;
+		return lastsubfont;
+	}
+	return 0;
+}
+
+void
+installsubfont(char *name, Subfont *subfont)
+{
+	free(lastname);
+	lastname = strdup(name);
+	lastsubfont = subfont;	/* notice we don't free the old one; that's your business */
+}
+
+void
+uninstallsubfont(Subfont *subfont)
+{
+	if(subfont == lastsubfont){
+		lastname = 0;
+		lastsubfont = 0;
+	}
+}
diff --git a/libdraw/subfontname.c b/libdraw/subfontname.c
new file mode 100644
index 00000000..ceaaa4a0
--- /dev/null
+++ b/libdraw/subfontname.c
@@ -0,0 +1,45 @@
+#include "lib9.h"
+#include "draw.h"
+
+/*
+ * Default version: convert to file name
+ */
+
+char*
+subfontname(char *cfname, char *fname, int maxdepth)
+{
+	char *t, *u, tmp1[128], tmp2[128];
+	int i;
+
+	if(strcmp(cfname, "*default*") == 0)
+		return strdup(cfname);
+	t = cfname;
+	if(t[0] != '/'){
+		snprint(tmp2, sizeof tmp2, "%s", fname);
+		u = utfrrune(tmp2, '/');
+		if(u)
+			u[0] = 0;
+		else
+			strcpy(tmp2, ".");
+		snprint(tmp1, sizeof tmp1, "%s/%s", tmp2, t);
+		t = tmp1;
+	}
+
+	if(maxdepth > 8)
+		maxdepth = 8;
+
+	for(i=3; i>=0; i--){
+		if((1<<i) > maxdepth)
+			continue;
+		/* try i-bit grey */
+		snprint(tmp2, sizeof tmp2, "%s.%d", t, i);
+		if(access(tmp2, AREAD) == 0)
+			return strdup(tmp2);
+	}
+
+	/* try default */
+	if(access(t, AREAD) == 0)
+		return strdup(t);
+
+	return nil;
+}
diff --git a/libdraw/test.c b/libdraw/test.c
new file mode 100644
index 00000000..937d6911
--- /dev/null
+++ b/libdraw/test.c
@@ -0,0 +1,9 @@
+#include "lib9.h"
+#include "draw.h"
+
+
+void
+main(int argc, char **argv)
+{
+		print("%dn", wordsperline(Rect(atoi(argv[1]), atoi(argv[2]), atoi(argv[3]), atoi(argv[4])), atoi(argv[5])));
+}
diff --git a/libdraw/unloadimage.c b/libdraw/unloadimage.c
new file mode 100644
index 00000000..9b1be8a7
--- /dev/null
+++ b/libdraw/unloadimage.c
@@ -0,0 +1,58 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+#include "interp.h"
+
+int
+unloadimage(Image *i, Rectangle r, uchar *data, int ndata)
+{
+	int bpl, n, ntot, dy;
+	uchar *a;
+	Display *d;
+
+	if(!rectinrect(r, i->r)){
+		kwerrstr("unloadimage: bad rectangle");
+		return -1;
+	}
+	bpl = bytesperline(r, i->depth);
+	if(ndata < bpl*Dy(r)){
+		kwerrstr("unloadimage: buffer too small");
+		return -1;
+	}
+
+	d = i->display;
+	flushimage(d, 0);	/* make sure subsequent flush is for us only */
+	ntot = 0;
+	while(r.min.y < r.max.y){
+		a = bufimage(d, 1+4+4*4);
+		if(a == 0){
+			kwerrstr("unloadimage: %r");
+			return -1;
+		}
+		dy = 8000/bpl;
+		if(dy <= 0){
+			kwerrstr("unloadimage: image too wide");
+			return -1;
+		}
+		if(dy > Dy(r))
+			dy = Dy(r);
+		a[0] = 'r';
+		BPLONG(a+1, i->id);
+		BPLONG(a+5, r.min.x);
+		BPLONG(a+9, r.min.y);
+		BPLONG(a+13, r.max.x);
+		BPLONG(a+17, r.min.y+dy);
+		if(flushimage(d, 0) < 0)
+			return -1;
+		if(d->local == 0)
+			release();
+		n = kchanio(d->datachan, data+ntot, ndata-ntot, OREAD);
+		if(d->local == 0)
+			acquire();
+		if(n < 0)
+			return n;
+		ntot += n;
+		r.min.y += dy;
+	}
+	return ntot;
+}
diff --git a/libdraw/window.c b/libdraw/window.c
new file mode 100644
index 00000000..31b9912d
--- /dev/null
+++ b/libdraw/window.c
@@ -0,0 +1,203 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+typedef struct Memimage Memimage;
+
+static int	screenid;
+
+Screen*
+allocscreen(Image *image, Image *fill, int public)
+{
+	uchar *a;
+	Screen *s;
+	int id, try;
+	Display *d;
+
+	d = image->display;
+	if(d != fill->display){
+		kwerrstr("allocscreen: image and fill on different displays");
+		return 0;
+	}
+	s = malloc(sizeof(Screen));
+	if(s == 0)
+		return 0;
+	SET(id);
+	for(try=0; try<25; try++){
+		/* loop until find a free id */
+		a = bufimage(d, 1+4+4+4+1);
+		if(a == 0){
+			free(s);
+			return 0;
+		}
+		id = ++screenid;
+		a[0] = 'A';
+		BPLONG(a+1, id);
+		BPLONG(a+5, image->id);
+		BPLONG(a+9, fill->id);
+		a[13] = public;
+		if(flushimage(d, 0) != -1)
+			break;
+	}
+	s->display = d;
+	s->id = id;
+	s->image = image;
+//	assert(s->image && s->image->chan != 0);
+
+	s->fill = fill;
+	return s;
+}
+
+Screen*
+publicscreen(Display *d, int id, ulong chan)
+{
+	uchar *a;
+	Screen *s;
+
+	s = malloc(sizeof(Screen));
+	if(s == 0)
+		return 0;
+	a = bufimage(d, 1+4+4);
+	if(a == 0){
+    Error:
+		free(s);
+		return 0;
+	}
+	a[0] = 'S';
+	BPLONG(a+1, id);
+	BPLONG(a+5, chan);
+	if(flushimage(d, 0) < 0)
+		goto Error;
+
+	s->display = d;
+	s->id = id;
+	s->image = 0;
+	s->fill = 0;
+	return s;
+}
+
+int
+freescreen(Screen *s)
+{
+	uchar *a;
+	Display *d;
+
+	if(s == 0)
+		return 0;
+	d = s->display;
+	a = bufimage(d, 1+4);
+	if(a == 0)
+		return -1;
+	a[0] = 'F';
+	BPLONG(a+1, s->id);
+	/*
+	 * flush(1) because screen is likely holding last reference to
+	 * window, and want it to disappear visually.
+	 */
+	if(flushimage(d, 1) < 0)
+		return -1;
+	free(s);
+	return 1;
+}
+
+Image*
+allocwindow(Screen *s, Rectangle r, int ref, ulong val)
+{
+	return _allocwindow(nil, s, r, ref, val);
+}
+
+Image*
+_allocwindow(Image *i, Screen *s, Rectangle r, int ref, ulong val)
+{
+	Display *d;
+
+	d = s->display;
+	i = _allocimage(i, d, r, s->image->chan, 0, val, s->id, ref);
+	if(i == 0)
+		return 0;
+	i->screen = s;
+	i->next = s->display->windows;
+	s->display->windows = i;
+	return i;
+}
+
+static
+void
+topbottom(Image **w, int n, int top)
+{
+	int i;
+	uchar *b;
+	Display *d;
+
+	if(n<0 || n>(Displaybufsize-100)/4){
+		_drawprint(2, "top/bottom: ridiculous number of windows\n");
+		return;
+	}
+	if(n==0)
+		return;
+	/* check that all images are on the same display; only it can check the screens */
+	d = w[0]->display;
+	for(i=1; i<n; i++)
+		if(w[i]->display != d){
+			_drawprint(2, "top/bottom: windows not on same display\n");
+			return;
+		}
+	b = bufimage(d, 1+1+2+4*n);
+	if (b == 0) {
+		_drawprint(2, "top/bottom: no bufimage\n");
+		return;
+	}
+	b[0] = 't';
+	b[1] = top;
+	BPSHORT(b+2, n);
+	for(i=0; i<n; i++)
+		BPLONG(b+4+4*i, w[i]->id);
+}
+
+void
+bottomwindow(Image *w)
+{
+	topbottom(&w, 1, 0);
+}
+
+void
+topwindow(Image *w)
+{
+	topbottom(&w, 1, 1);
+}
+
+void
+bottomnwindows(Image **w, int n)
+{
+	topbottom(w, n, 0);
+}
+
+void
+topnwindows(Image **w, int n)
+{
+	topbottom(w, n, 1);
+}
+
+int
+originwindow(Image *w, Point log, Point scr)
+{
+	uchar *b;
+	Point delta;
+
+	flushimage(w->display, 0);
+	b = bufimage(w->display, 1+4+2*4+2*4);
+	if(b == nil)
+		return 0;
+	b[0] = 'o';
+	BPLONG(b+1, w->id);
+	BPLONG(b+5, log.x);
+	BPLONG(b+9, log.y);
+	BPLONG(b+13, scr.x);
+	BPLONG(b+17, scr.y);
+	if(flushimage(w->display, 1) < 0)
+		return -1;
+	delta = subpt(log, w->r.min);
+	w->r = rectaddpt(w->r, delta);
+	w->clipr = rectaddpt(w->clipr, delta);
+	return 1;
+}
diff --git a/libdraw/writecolmap.c b/libdraw/writecolmap.c
new file mode 100644
index 00000000..6bbc7feb
--- /dev/null
+++ b/libdraw/writecolmap.c
@@ -0,0 +1,37 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+/*
+ * This code (and the devdraw interface) will have to change
+ * if we ever get bitmaps with ldepth > 3, because the
+ * colormap will have to be written in chunks
+ */
+
+void
+writecolmap(Display *d, RGB *m)
+{
+	int i, n, fd;
+	char buf[64], *t;
+	ulong r, g, b;
+
+	sprint(buf, "/dev/draw/%d/colormap", d->dirno);
+	fd = open(buf, OWRITE);
+	if(fd < 0)
+		drawerror(d, "wrcolmap: open colormap failed");
+	t = malloc(8192);
+	if(t == nil)
+		return;
+	n = 0;
+	for(i = 0; i < 256; i++) {
+		r = m[i].red>>24;
+		g = m[i].green>>24;
+		b = m[i].blue>>24;
+		n += sprint(t+n, "%d %lud %lud %lud\n", 255-i, r, g, b);
+	}
+	i = libwrite(fd, t, n);
+	free(t);
+	close(fd);
+	if(i != n)
+		drawerror(d, "wrcolmap: bad write");
+}
diff --git a/libdraw/writeimage.c b/libdraw/writeimage.c
new file mode 100644
index 00000000..cd5515d5
--- /dev/null
+++ b/libdraw/writeimage.c
@@ -0,0 +1,185 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+#define	HSHIFT	3	/* HSHIFT==5 runs slightly faster, but hash table is 64x bigger */
+#define	NHASH	(1<<(HSHIFT*NMATCH))
+#define	HMASK	(NHASH-1)
+#define	hupdate(h, c)	((((h)<<HSHIFT)^(c))&HMASK)
+typedef struct Hlist Hlist;
+struct Hlist{
+	uchar *s;
+	Hlist *next, *prev;
+};
+
+int
+writeimage(int fd, Image *i, int dolock)
+{
+	uchar *outbuf, *outp, *eout;		/* encoded data, pointer, end */
+	uchar *loutp;				/* start of encoded line */
+	Hlist *hash;				/* heads of hash chains of past strings */
+	Hlist *chain, *hp;			/* hash chain members, pointer */
+	Hlist *cp;				/* next Hlist to fall out of window */
+	int h;					/* hash value */
+	uchar *line, *eline;			/* input line, end pointer */
+	uchar *data, *edata;			/* input buffer, end pointer */
+	ulong n;				/* length of input buffer */
+	ulong nb;				/* # of bytes returned by unloadimage */
+	int bpl;				/* input line length */
+	int offs, runlen;			/* offset, length of consumed data */
+	uchar dumpbuf[NDUMP];			/* dump accumulator */
+	int ndump;				/* length of dump accumulator */
+	int miny, dy;				/* y values while unloading input */
+	int chunk, ncblock;
+	Rectangle r;
+	uchar *p, *q, *s, *es, *t;
+	char hdr[11+5*12+1];
+	char cbuf[20];
+
+	chunk = i->display->bufsize - 32;	/* a little room for header */
+	r = i->r;
+	bpl = bytesperline(r, i->depth);
+	n = Dy(r)*bpl;
+	data = malloc(n);
+	ncblock = _compblocksize(r, i->depth);
+	outbuf = malloc(ncblock);
+	hash = malloc(NHASH*sizeof(Hlist));
+	chain = malloc(NMEM*sizeof(Hlist));
+	if(data == 0 || outbuf == 0 || hash == 0 || chain == 0){
+	ErrOut:
+		free(data);
+		free(outbuf);
+		free(hash);
+		free(chain);
+		return -1;
+	}
+	for(miny = r.min.y; miny != r.max.y; miny += dy){
+		dy = r.max.y-miny;
+		if(dy*bpl > chunk)
+			dy = chunk/bpl;
+		if(dolock)
+			lockdisplay(i->display);
+		nb = unloadimage(i, Rect(r.min.x, miny, r.max.x, miny+dy),
+			data+(miny-r.min.y)*bpl, dy*bpl);
+		if(dolock)
+			unlockdisplay(i->display);
+		if(nb != dy*bpl)
+			goto ErrOut;
+	}
+	sprint(hdr, "compressed\n%11s %11d %11d %11d %11d ",
+		chantostr(cbuf, i->chan), r.min.x, r.min.y, r.max.x, r.max.y);
+	if(libwrite(fd, hdr, 11+5*12) != 11+5*12)
+		goto ErrOut;
+	edata = data+n;
+	eout = outbuf+ncblock;
+	line = data;
+	r.max.y = r.min.y;
+	while(line != edata){
+		memset(hash, 0, NHASH*sizeof(Hlist));
+		memset(chain, 0, NMEM*sizeof(Hlist));
+		cp = chain;
+		h = 0;
+		outp = outbuf;
+		for(n = 0; n != NMATCH; n++)
+			h = hupdate(h, line[n]);
+		loutp = outbuf;
+		while(line != edata){
+			ndump = 0;
+			eline = line+bpl;
+			for(p = line; p != eline; ){
+				if(eline-p < NRUN)
+					es = eline;
+				else
+					es = p+NRUN;
+				q = 0;
+				runlen = 0;
+				for(hp = hash[h].next; hp; hp = hp->next){
+					s = p + runlen;
+					if(s >= es)
+						continue;
+					t = hp->s + runlen;
+					for(; s >= p; s--)
+						if(*s != *t--)
+							goto matchloop;
+					t += runlen+2;
+					s += runlen+2;
+					for(; s < es; s++)
+						if(*s != *t++)
+							break;
+					n = s-p;
+					if(n > runlen){
+						runlen = n;
+						q = hp->s;
+						if(n == NRUN)
+							break;
+					}
+			matchloop: ;
+				}
+				if(runlen < NMATCH){
+					if(ndump == NDUMP){
+						if(eout-outp < ndump+1)
+							goto Bfull;
+						*outp++ = ndump-1+128;
+						memmove(outp, dumpbuf, ndump);
+						outp += ndump;
+						ndump = 0;
+					}
+					dumpbuf[ndump++] = *p;
+					runlen = 1;
+				}
+				else{
+					if(ndump != 0){
+						if(eout-outp < ndump+1)
+							goto Bfull;
+						*outp++ = ndump-1+128;
+						memmove(outp, dumpbuf, ndump);
+						outp += ndump;
+						ndump = 0;
+					}
+					offs = p-q-1;
+					if(eout-outp < 2)
+						goto Bfull;
+					*outp++ = ((runlen-NMATCH)<<2) + (offs>>8);
+					*outp++ = offs&255;
+				}
+				for(q = p+runlen; p != q; p++){
+					if(cp->prev)
+						cp->prev->next = 0;
+					cp->next = hash[h].next;
+					cp->prev = &hash[h];
+					if(cp->next)
+						cp->next->prev = cp;
+					cp->prev->next = cp;
+					cp->s = p;
+					if(++cp == &chain[NMEM])
+						cp = chain;
+					if(edata-p > NMATCH)
+						h = hupdate(h, p[NMATCH]);
+				}
+			}
+			if(ndump != 0){
+				if(eout-outp < ndump+1)
+					goto Bfull;
+				*outp++ = ndump-1+128;
+				memmove(outp, dumpbuf, ndump);
+				outp += ndump;
+			}
+			line = eline;
+			loutp = outp;
+			r.max.y++;
+		}
+	Bfull:
+		if(loutp == outbuf)
+			goto ErrOut;
+		n = loutp-outbuf;
+		sprint(hdr, "%11d %11ld ", r.max.y, n);
+		libwrite(fd, hdr, 2*12);
+		libwrite(fd, outbuf, n);
+		r.min.y = r.max.y;
+	}
+	free(data);
+	free(outbuf);
+	free(hash);
+	free(chain);
+	return 0;
+}
diff --git a/libdraw/writesubfont.c b/libdraw/writesubfont.c
new file mode 100644
index 00000000..af7f0dc5
--- /dev/null
+++ b/libdraw/writesubfont.c
@@ -0,0 +1,45 @@
+#include "lib9.h"
+#include "draw.h"
+#include "kernel.h"
+
+static
+void
+packinfo(Fontchar *fc, uchar *p, int n)
+{
+	int j;
+
+	for(j=0;  j<=n;  j++){
+		p[0] = fc->x;
+		p[1] = fc->x>>8;
+		p[2] = fc->top;
+		p[3] = fc->bottom;
+		p[4] = fc->left;
+		p[5] = fc->width;
+		fc++;
+		p += 6;
+	}
+}
+
+int
+writesubfont(int fd, Subfont *f)
+{
+	char hdr[3*12+1];
+	uchar *data;
+	int nb;
+
+	sprint(hdr, "%11d %11d %11d ", f->n, f->height, f->ascent);
+	if(libwrite(fd, hdr, 3*12) != 3*12){
+   Err:
+		kwerrstr("writesubfont: bad write: %r");
+		return -1;
+	}
+	nb = 6*(f->n+1);
+	data = malloc(nb);
+	if(data == nil)
+		return -1;
+	packinfo(f->info, data, f->n);
+	if(libwrite(fd, data, nb) != nb)
+		goto Err;
+	free(data);
+	return 0;
+}