this patch allows libframe to take advantage of accellerated stringbg drawing.

Reference: /n/sources/patch/applied/libframe-alpha
Date: Sat May 13 17:24:00 CES 2006
Signed-off-by: quanstro@quanstro.net

--- /sys/src/libframe/frdraw.c	Sat May 13 17:19:24 2006
+++ /sys/src/libframe/frdraw.c	Sat May 13 17:19:20 2006
@@ -6,7 +6,7 @@
 #include <frame.h>
 
 void
-_frredraw(Frame *f, Point pt)
+_frredraw(Frame *f, Point pt, Image *text, Image *back)
 {
 	Frbox *b;
 	int nb;
@@ -15,7 +15,7 @@
 	for(nb=0,b=f->box; nb<f->nbox; nb++, b++){
 		_frcklinewrap(f, &pt, b);
 		if(b->nrune >= 0){
-			string(f->b, pt, f->cols[TEXT], ZP, f->font, (char *)b->ptr);
+			stringbg(f->b, pt, text, ZP, f->font, (char *)b->ptr, back, ZP);
 		}
 		pt.x += b->wid;
 	}
@@ -78,6 +78,7 @@
 		if(p >= p0){
 			qt = pt;
 			_frcklinewrap(f, &pt, b);
+			// fill in the end of a wrapped line
 			if(pt.y > qt.y)
 				draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
 		}
@@ -101,7 +102,7 @@
 			x = f->r.max.x;
 		draw(f->b, Rect(pt.x, pt.y, x, pt.y+f->font->height), back, nil, pt);
 		if(b->nrune >= 0)
-			stringn(f->b, pt, text, ZP, f->font, ptr, nr);
+			stringnbg(f->b, pt, text, ZP, f->font, ptr, nr, back, ZP);
 		pt.x += w;
 	    Continue:
 		b++;
--- /sys/src/libframe/frinsert.c	Sat May 13 17:19:46 2006
+++ /sys/src/libframe/frinsert.c	Sat May 13 17:19:40 2006
@@ -262,7 +262,7 @@
 	else
 		col = f->cols[BACK];
 	frselectpaint(f, ppt0, ppt1, col);
-	_frredraw(&frame, ppt0);
+	_frredraw(&frame, ppt0, f->cols[TEXT], col);
 	_fraddbox(f, nn0, frame.nbox);
 	for(n=0; n<frame.nbox; n++)
 		f->box[nn0+n] = frame.box[n];
--- /sys/include/frame.h	Sat May 13 17:20:10 2006
+++ /sys/include/frame.h	Sat May 13 17:20:06 2006
@@ -80,7 +80,7 @@
 int	_frnewwid(Frame*, Point, Frbox*);
 int	_frnewwid0(Frame*, Point, Frbox*);
 void	_frclean(Frame*, Point, int, int);
-void	_frredraw(Frame*, Point);
+void	_frredraw(Frame*, Point, Image*, Image*);
 void	_fraddbox(Frame*, int, int);
 Point	_frptofcharptb(Frame*, ulong, Point, int);
 Point	_frptofcharnb(Frame*, ulong, int);
--- /sys/src/cmd/rio/wind.c	Sat May 13 17:20:55 2006
+++ /sys/src/cmd/rio/wind.c	Sat May 13 17:20:39 2006
@@ -709,11 +709,8 @@
 wrepaint(Window *w)
 {
 	wsetcols(w);
-	if(!w->mouseopen){
-		if(font->maxdepth > 1)
-			draw(w->Frame.b, w->Frame.r, cols[BACK], nil, ZP);
-		_frredraw(w, w->Frame.r.min);
-	}
+	if(!w->mouseopen)
+		_frredraw(w, w->Frame.r.min, w->Frame.cols[TEXT], w->Frame.cols[BACK]);
 	if(w == input){
 		wborder(w, Selborder);
 		wsetcursor(w, 0);