initial commit

python/code39.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+This module can generate Code-39 barcodes
+
+(C) 2022 Louis Heredero  louis.heredero@edu.vs.ch
+"""
+
+import pygame
+
+code39_dict = {
+    "A": "100001001", "B": "001001001",
+    "C": "101001000", "D": "000011001",
+    "E": "100011000", "F": "001011000",
+    "G": "000001101", "H": "100001100",
+    "I": "001001100", "J": "000011100",
+    "K": "100000011", "L": "001000011",
+    "M": "101000010", "N": "000010011",
+    "O": "100010010", "P": "001010010",
+    "Q": "000000111", "R": "100000110",
+    "S": "001000110", "T": "000010110",
+    "U": "110000001", "V": "011000001",
+    "W": "111000000", "X": "010010001",
+    "Y": "110010000", "Z": "011010000",
+    "0": "000110100", "1": "100100001",
+    "2": "001100001", "3": "101100000",
+    "4": "000110001", "5": "100110000",
+    "6": "001110000", "7": "000100101",
+    "8": "100100100", "9": "001100100",
+    " ": "011000100", "-": "010000101",
+    "$": "010101000", "%": "000101010",
+    ".": "110000100", "/": "010100010",
+    "+": "010001010", "*": "010010100"
+}
+
+def code39(text):
+    text = text.upper()
+    text = map(lambda c: code39_dict[c], text)
+    return "0".join(text)
+
+def draw_barcode(barcode, win):
+    barcode = list(map(int, barcode))
+    width = win.get_width()*0.8
+    height = win.get_height()*0.5
+    thicks = sum(barcode)
+    thins = len(barcode)-thicks
+    bar_w = width/(thicks*2+thins)
+
+    win.fill((255,255,255))
+    x = win.get_width()*0.1
+    y = win.get_height()*0.25
+
+    for i, c in enumerate(barcode):
+        w = 2*bar_w if c else bar_w
+        if i%2 == 0:
+            pygame.draw.rect(win, (0,0,0), [x, y, w, height])
+
+        x += w
+
+if __name__ == "__main__":
+    import base
+    
+    b = base.Base(800, 500, "Code-39 barcode generator")
+    
+    barcode = code39("*CODE-39*")
+    draw_barcode(barcode, b.w)
+    
+    b.main()