From 17560f8bf49a0be2e0b490159e29f4894fe12cba Mon Sep 17 00:00:00 2001
From: Sebastian Reichel <sre@ring0.de>
Date: Fri, 29 Jun 2018 00:56:47 +0200
Subject: libcairobarcode: move to src

---
 src/libcairobarcode/code39.vala | 128 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 src/libcairobarcode/code39.vala

(limited to 'src/libcairobarcode/code39.vala')

diff --git a/src/libcairobarcode/code39.vala b/src/libcairobarcode/code39.vala
new file mode 100644
index 0000000..ca5451c
--- /dev/null
+++ b/src/libcairobarcode/code39.vala
@@ -0,0 +1,128 @@
+/* Copyright 2014, Sebastian Reichel <sre@ring0.de>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+public class Code39 {
+	Cairo.Context ctx;
+	double width;
+	double height;
+
+	/* 0 = wide black, 1 = narrow black, 2 = wide white, 3 = narrow white */
+	const uint32[] lookup_table = {
+		0x1d8cd, 0xd9dc, 0x1c9dc, 0xc9dd, 0x1d8dc, 0xd8dd, 0x1c8dd, 0x1d9cc,
+		0xd9cd, 0x1c9cd, 0xdd9c, 0x1cd9c, 0xcd9d, 0x1dc9c, 0xdc9d, 0x1cc9d,
+		0x1dd8c, 0xdd8d, 0x1cd8d, 0x1dc8d, 0xddd8, 0x1cdd8, 0xcdd9, 0x1dcd8,
+		0xdcd9, 0x1ccd9, 0x1ddc8, 0xddc9, 0x1cdc9, 0x1dcc9, 0x9ddc, 0x18ddc,
+		0x8ddd, 0x19cdc, 0x9cdd, 0x18cdd, 0x19dcc, 0x9dcd, 0x18dcd, 0x1999d,
+		0x199d9, 0x19d99, 0x1d999, 0x19ccd
+	};
+
+	public Code39(Cairo.Context ctx, double width, double height) {
+		this.ctx = ctx;
+		this.width = width;
+		this.height = height;
+	}
+
+	private int lookup_index(char c) throws BarcodeError {
+		if(c >= '0' && c <= '9')
+			return c - '0';
+		if(c >= 'A' && c <= 'Z')
+			return c - 'A' + 10;
+		switch (c) {
+			case '-':
+				return 36;
+			case '.':
+				return 37;
+			case ' ':
+				return 38;
+			case '$':
+				return 39;
+			case '/':
+				return 40;
+			case '+':
+				return 41;
+			case '%':
+				return 42;
+			case '*':
+				return 43;
+			default:
+				throw new BarcodeError.UNEXPECTED_CHARACTER("Character '%c' is not allowed in Code 39".printf(c));
+		}
+	}
+
+	private uint32 lookup(char c) throws BarcodeError {
+		return lookup_table[lookup_index(c)];
+	}
+
+	private void draw_line(bool black, double linewidth) {
+		double x,y;
+
+		if(black)
+			ctx.set_source_rgb(0, 0, 0);
+		else
+			ctx.set_source_rgb(1, 1, 1);
+
+		ctx.rel_line_to(0,height);
+		ctx.rel_move_to(linewidth,-height);
+
+		ctx.get_current_point(out x, out y);
+		ctx.stroke();
+		ctx.move_to(x,y);
+	}
+
+	public void draw(string code) throws BarcodeError {
+		string mycode = code;
+
+		if(!mycode.has_prefix("*"))
+			mycode = "*" + mycode;
+		if(!mycode.has_suffix("*"))
+			mycode = mycode + "*";
+
+		double linewidth = width / (mycode.length * 13.0);
+
+		ctx.save();
+		ctx.set_line_width(linewidth);
+		ctx.move_to(0,0);
+		ctx.rel_move_to(0.5*linewidth,0);
+
+		for(int i=0; i<mycode.length; i++) {
+			var format = lookup(mycode[i]);
+
+			for(int j=8; j>=0; j--) {
+				var line = (format >> (2*j)) & 0x3;
+
+				switch(line) {
+					case 0:
+						draw_line(true, linewidth);
+						draw_line(true, linewidth);
+						break;
+					case 1:
+						draw_line(true, linewidth);
+						break;
+					case 2:
+						draw_line(false, linewidth);
+						draw_line(false, linewidth);
+						break;
+					default:
+						draw_line(false, linewidth);
+						break;
+				}
+			}
+
+			draw_line(false, linewidth);
+		}
+
+		ctx.restore();
+	}
+}
-- 
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