lib: add library to generate QR code footprints

coraleda/subc/qr

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+#@@example qr(hello world, 1mm)
+
+#@@purpose Generate QR code on silk
+
+#@@desc Generate the specified QR code as silk lines
+#@@params text,pixel_size,level
+#@@thumbsize 2
+
+#@@param:text ASCII text to encode
+
+#@@param:pixel_size width and height of each pixel
+#@@dim:pixel_size
+
+#@@param:level error correction level
+#@@optional:level
+#@@enum:level:L low
+#@@enum:level:H high
+#@@default:L
+
+libdir=""
+for n in  $PCB_RND_PCBLIB/parametric `dirname $0` /usr/local/share/pcb-rnd/pcblib/parametric /usr/share/pcb-rnd/pcblib/parametric
+do
+	if test -f "$n/common.awk"
+	then
+		libdir="$n"
+		break
+	fi
+done
+
+if test -z "$libdir"
+then
+	echo "pcblib/parametric/common.awk not found." >&2
+	exit 1
+fi
+
+awk -f $libdir/common.awk -f `dirname $0`/qr.awk -v "args=$*" -v gen=`basename $0` -v "genfull=$0"
+

coraleda/subc/qr.awk

@@ -0,0 +1,62 @@
+function flush_line(x1, x2, y, w     ,n,yy)
+{
+	x1/=2
+	x2/=2
+	for(n = 0; n < 3; n++) {
+		yy = y*w + w/6 + w/3 * n
+		element_line(x1*w + w/6, yy, x2*w - w/6, yy, w/3)
+	}
+
+	element_line(x1*w + w/6, y*w + w/6, x1*w + w/6, (y+1)*w - w/6, w/3)
+	element_line(x2*w - w/6, y*w + w/6, x2*w - w/6, (y+1)*w - w/6, w/3)
+
+}
+
+BEGIN {
+	help_auto()
+	set_arg(P, "?pixel_size", "1mm")
+
+	proc_args(P, "text,pixel_size,level", "text")
+
+	pixel_size = parse_dim(P["pixel_size"])
+
+	element_begin("", "QR1", "qr(" P["text"] "," P["pixel_size"] "," P["level"] ")"  ,0,0, 0,-mil(50))
+
+	print "# text=" P["text"]
+	cmd = "echo '" P["text"] "' | qrencode -t ASCII"
+
+	if (P["level"] != "") {
+		if (tolower(P["level"]) == "h")
+			cmd = cmd " -l H"
+		else if (tolower(P["level"]) == "l")
+			cmd = cmd " -l L"
+	}
+
+	y = 0;
+	while((cmd | getline line) > 0) {
+		line = line "-"
+#		print line
+		len = length(line)
+		start = ""
+		for(x = 1; x < len; x++) {
+			if (substr(line, x, 1) == "#") {
+				if (start == "")
+					start = x;
+			}
+			else {
+				if (start != "") {
+					flush_line(start, x, y, pixel_size)
+					start = ""
+				}
+			}
+		}
+		if (start != "")
+			flush_line(start, x, y, pixel_size)
+		y++;
+	}
+
+
+#	dimension(+spacing/aspect, -dia, +spacing/aspect, dia, "@" spacing*1.2 ";0", "dia")
+
+	element_end()
+}