Import sources from 2011-03-30 iso image

1 files changed, 188 insertions, 0 deletions

diff --git a/sys/src/cmd/bitsy/pencal.c b/sys/src/cmd/bitsy/pencal.c
new file mode 100755
index 000000000..4ce830010
--- /dev/null
+++ b/sys/src/cmd/bitsy/pencal.c
@@ -0,0 +1,188 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+
+int debug = 0;
+
+struct Cal {
+	double scalex;
+	double transx;
+	double scaley;
+	double transy;
+} cal;
+
+/* Calibrate the pen */
+
+Point pts[5];
+
+Point pens[5];
+
+Point up	= {  0, -10};
+Point down	= {  0,  10};
+Point left	= {-10,   0};
+Point right	= { 10,   0};
+
+Point
+pen2scr(Point p)
+{
+	return Pt(p.x * cal.scalex / 65536.0 + cal.transx,
+			  p.y * cal.scaley / 65536.0 + cal.transy);
+}
+
+Point
+scr2pen(Point p)
+{
+	return Pt((p.x - cal.transx) * 65536.0 / cal.scalex,
+			  (p.y + cal.transy) * 65536.0 / cal.scaley);
+}
+
+void
+cross(Point p) {
+	draw(screen, screen->r, display->white, nil, ZP);
+	line(screen, addpt(p, up), addpt(p, down), Endsquare, Endsquare, 0, display->black, ZP);
+	line(screen, addpt(p, left), addpt(p, right), Endsquare, Endsquare, 0, display->black, ZP);
+	flushimage(display, 1);
+}
+
+Point
+getmouse(int mouse) {
+	static char buf[50];
+	int x, y, b, n;
+	Point p;
+
+	n = 0;
+	p.x = p.y = 0;
+	do{
+		if (read(mouse, buf, 48) != 48)
+			sysfatal("read: %r");
+		if (debug > 1) fprint(2, "%s\n", buf);
+		if (buf[0] == 'r') {
+			b = 1;
+			continue;
+		}
+		if (buf[0] != 'm')
+			sysfatal("mouse message: %s", buf);
+		x = strtol(buf+1, nil, 10);
+		y = strtol(buf+13, nil, 10);
+		b = strtol(buf+25, nil, 10);
+		p.x = (n * p.x + x)/(n+1);
+		p.y = (n * p.y + y)/(n+1);
+		n++;
+	}while (b & 0x7);
+	return p;
+}
+
+void
+main(int argc, char **argv) {
+	int i, mouse, mousectl, wctl, ntries;
+	Rectangle r, oldsize;
+
+	ARGBEGIN{
+	case 'd':
+		debug = 1;
+		break;
+	}ARGEND;
+
+	if((mouse = open("/dev/mouse", OREAD)) < 0
+	 && (mouse = open("#m/mouse", OREAD)) < 0)
+		sysfatal("#m/mouse: %r");
+
+	mousectl = open("#m/mousectl", ORDWR);
+	if(mousectl < 0)
+		sysfatal("#m/mousectl: %r");
+
+	if(initdraw(nil, nil, "calibrate") < 0)
+		sysfatal("initdraw: %r");
+
+	wctl = -1;
+	for(ntries = 0; ntries < 3; ntries++){
+		r = insetrect(display->image->r, 2);
+
+		if(wctl < 0)
+			wctl = open("/dev/wctl", ORDWR);
+		if(wctl >= 0){
+			char buf[4*12+1];
+
+			buf[48] = 0;
+			oldsize = screen->r;
+			if(fprint(wctl, "resize -r %R", r) <= 0)
+				sysfatal("write /dev/wctl, %r");
+			if(getwindow(display, Refbackup) < 0)
+				sysfatal("getwindow");
+			if(debug) fprint(2, "resize: %R\n", screen->r);
+
+			if(read(mousectl, buf, 48) != 48)
+				sysfatal("read mousectl: %r");
+			if(debug > 1) fprint(2, "mousectl %s\n", buf);
+			if(buf[0] != 'c')
+				sysfatal("mousectl message: %s", buf);
+			cal.scalex = strtol(buf+ 1, nil, 10);
+			cal.scaley = strtol(buf+13, nil, 10);
+			cal.transx = strtol(buf+25, nil, 10);
+			cal.transy = strtol(buf+37, nil, 10);
+		}else{
+			fprint(mousectl, "calibrate");
+			cal.scalex = 1<<16;
+			cal.scaley = 1<<16;
+			cal.transx = 0;
+			cal.transy = 0;
+		}
+
+		fprint(2, "calibrate %ld %ld %ld %ld (old)\n",
+			(long)cal.scalex, (long)cal.scaley, (long)cal.transx, (long)cal.transy);
+
+		if(debug)
+			fprint(2, "screen coords %R\n", screen->r);
+		pts[0] = addpt(Pt( 16,  16), screen->r.min);
+		pts[1] = addpt(Pt( 16, -16), Pt(screen->r.min.x, screen->r.max.y));
+		pts[2] = addpt(Pt(-16,  16), Pt(screen->r.max.x, screen->r.min.y));
+		pts[3] = addpt(Pt(-16, -16), screen->r.max);
+		pts[4] = Pt((screen->r.max.x + screen->r.min.x)/2,
+					(screen->r.max.y + screen->r.min.y)/2);;
+
+		for(i = 0; i < 4; i++){
+			cross(pts[i]);
+			pens[i] = scr2pen(getmouse(mouse));
+			if (debug) fprint(2, "%P\n", pens[i]);
+		}
+
+		cal.scalex = (pts[2].x + pts[3].x - pts[0].x - pts[1].x) * 65536.0 /
+				  (pens[2].x + pens[3].x - pens[0].x - pens[1].x);
+		cal.scaley = (pts[1].y + pts[3].y - pts[0].y - pts[2].y) * 65536.0 /
+				  (pens[1].y + pens[3].y - pens[0].y - pens[2].y);
+		cal.transx = pts[0].x - (pens[0].x*cal.scalex) / 65536.0;
+		cal.transy = pts[0].y - (pens[0].y*cal.scaley) / 65536.0;
+
+		if(debug)
+			fprint(2, "scale [%f, %f], trans [%f, %f]\n",
+				cal.scalex, cal.scaley, cal.transx, cal.transy);
+
+		fprint(mousectl, "calibrate %ld %ld %ld %ld",
+			(long)cal.scalex, (long)cal.scaley, (long)cal.transx, (long)cal.transy);
+
+		cross(pts[4]);
+		pens[4] = getmouse(mouse);
+
+		draw(screen, screen->r, display->white, nil, ZP);
+		flushimage(display, 1);
+
+		if(abs(pts[4].x-pens[4].x) <= 4 && abs(pts[4].y-pens[4].y) <= 4){
+			fprint(2, "Calibration ok: %P -> %P\n", pts[4], pens[4]);
+			break;
+		}
+		fprint(2, "Calibration inaccurate: %P -> %P\n", pts[4], pens[4]);
+	}
+	print("calibrate='%ld %ld %ld %ld'\n",
+		(long)cal.scalex, (long)cal.scaley, (long)cal.transx, (long)cal.transy);
+
+	if(debug)
+		for(i = 0; i < 4; i++){
+			cross(pts[i]);
+			pens[i] = getmouse(mouse);
+			if (debug) fprint(2, "%P\n", pens[i]);
+		}
+
+	if(wctl >= 0)
+		fprint(wctl, "resize -r %R", oldsize);
+
+}