Import sources from 2011-03-30 iso image

1 files changed, 144 insertions, 0 deletions

diff --git a/sys/src/libdraw/string.c b/sys/src/libdraw/string.c
new file mode 100755
index 000000000..4e876c170
--- /dev/null
+++ b/sys/src/libdraw/string.c
@@ -0,0 +1,144 @@
+#include <u.h>
+#include <libc.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;
+	Subfont *sf;
+
+	if(s == nil){
+		s = "";
+		sptr = nil;
+	}else
+		sptr = &s;
+	if(r == nil){
+		r = (Rune*) L"";
+		rptr = nil;
+	}else
+		rptr = &r;
+	sf = nil;
+	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){
+				fprint(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){
+			freesubfont(sf);
+			if((sf=_getsubfont(f->display, subfontname)) == 0){
+				def = f->display ? f->display->defaultfont : nil;
+				if(def && f!=def)
+					f = def;
+				else
+					break;
+			}
+			/* 
+			 * must not free sf until cachechars has found it in the cache
+			 * and picked up its own reference.
+			 */
+		}
+	}
+	return pt;
+}