FontEditor.py

# -*- coding: utf-8 -*-
from Tkinter import *
import tkFileDialog


START = """#ifndef FONT5X7_H
#define FONT5X7_H

#ifdef __AVR__
 #include <avr/io.h>
 #include <avr/pgmspace.h>
#else
 #define PROGMEM
#endif

// Standard ASCII 5x7 font

static const unsigned char font[] PROGMEM = {
"""
END = """};
#endif // FONT5X7_H"""


def hexf(x):
  return hex(x)[2:].upper().rjust(2, "0")


class Application(Frame):
  def __init__(self, master = None):
    Frame.__init__(self, master)
    self.pack()
    m = Menu(self)
    m.add_command(label = "Open", command = self.open_file)
    m.add_command(label = "Save", command = self.save_file)
    master.config(menu = m)
    self.canvas = Canvas(self, width = 464, height = 408, highlightthickness = 0)
    self.canvas.bind("<Button-1>", self.click)
    self.canvas.pack(padx = 5, pady = 5)
    self.area = []
    for x in xrange(5):
      for y in xrange(8):
        self.area.append(self.canvas.create_rectangle(x*51, y*51, x*51+50, y*51+50, fill = "white", width = 0))
    self.indexs, self.images, self.rectangles = [], [], []
    image = PhotoImage(width = 10, height = 16)
    for y in xrange(16):
      for x in xrange(10):
        image.put("#fff", (x, y))
    for y in xrange(1, 17, 1):
      for x in xrange(1, 17, 1):
        i = 0 if y < 9 else 1
        self.rectangles.append(self.canvas.create_rectangle(x*12+260, y*18+i, x*12+271, y*18+i+17, fill = "white", outline = "grey"))
        img = image.copy()
        self.indexs.append(self.canvas.create_image(x*12+261, y*18+i+1, image = img, anchor = NW))
        self.images.append(img)
    for xy in xrange(1, 17, 1):
      i = 0 if xy < 9 else 1
      self.canvas.create_text(xy*12+266, 10, text = hex(xy-1)[2:].upper())
      self.canvas.create_text(266, xy*18+i+8, text = hex(xy-1)[2:].upper())
    self.canvas.create_line(260, 162, 464, 162, fill = "red")
    self.canvas.create_text(270, 330, text = "Selected int:", anchor = SW)
    self.canvas.create_text(345, 330, text = " ", anchor = SW, tags = "INT")
    self.canvas.create_text(270, 350, text = "Selected hex:", anchor = SW)
    self.canvas.create_text(345, 350, text = " ", anchor = SW, tags = "HEX")
    self.index = 0
    self.load(self.images[self.index])
    self.canvas.itemconfig(self.rectangles[self.index], outline = "blue")

  def open_file(self):
    filename = tkFileDialog.askopenfilename(defaultextension = '.c', filetypes = [('all files', '.*'), ('c code', '.c')])
    if not filename:return
    try:
      txt = open(filename, "rb").read()
    except:
      print "cannot open file"
      return
    start = txt.find("{")
    if start == -1:
      print "cannot find array start"
      return
    end = txt.find("}", start)
    if end == -1:
      print "cannot find array end"
      return
    txt = txt[start:end+1]
    txt = txt.replace("{", "[")
    txt = txt.replace("}", "]")
    txt = txt.replace("//", "#")
    try:sp = eval(txt)
    except:
      print "wrong array format"
      return
    if len(sp) != 1280:
      print "wrong array length, try: 256 rows by 5 columns, total 1280 elements"
      return
    for i in xrange(256):
      txt = []
      for b in sp[i*5:i*5+5]:
        txt += list(bin(b)[2:].rjust(8, "0")[::-1])
      image = self.images[i]
      for x in xrange(5):
        for y in xrange(8):
          color = "#fff" if txt.pop(0) == "0" else "#000"
          self.putpixel(image, x, y, color)
    self.canvas.itemconfig(self.rectangles[self.index], outline = "grey")
    self.index = 0
    self.load(self.images[self.index])
    self.canvas.itemconfig(self.rectangles[self.index], outline = "blue")

  def save_file(self):
    filename = tkFileDialog.asksaveasfilename(defaultextension = '.c', filetypes = [('all files', '.*'), ('c code', '.c')])
    if not filename:return
    try:
      f = open(filename, "wb")
    except:
      print "cannot open file"
      return
    sp = []
    for i in xrange(256):
      image = self.images[i]
      for x in xrange(5):
        txt = ""
        for y in xrange(8):
          color = "0" if image.get(x*2, y*2) == "255 255 255" else "1"
          txt += color
        txt = txt[::-1]
        sp.append("0x%s"%hexf(int(txt, 2)))
    f.write(START)
    txt = ""
    for i in xrange(256):
      b = sp[i*5:i*5+5]
      b = "\t" + ", ".join(b)
      if i != 255:b += ","
      b += "\t//%s\t%s\r\n"%(hexf(i), i)
      txt += b
    f.write(txt)
    f.write(END)
    f.close()
    print "save ok"

  def click(self, event):
    tag = self.canvas.find_withtag(CURRENT)
    if not tag:return
    tag = tag[0]
    if self.canvas.type(tag) == "rectangle" and tag in self.area:
      index = self.area.index(tag)
      image = self.images[self.index]
      x = index / 8
      y = index % 8
      if image.get(x*2, y*2) == "255 255 255":
        self.putpixel(image, x, y, "#000")
        self.canvas.itemconfig(tag, fill = "black")
      else:
        self.putpixel(image, x, y, "#fff")
        self.canvas.itemconfig(tag, fill = "white")
    elif self.canvas.type(tag) == "image" and tag in self.indexs:
      index = self.indexs.index(tag)
      image = self.images[index]
      rectangle = self.rectangles[index]
      self.canvas.itemconfig(self.rectangles[self.index], outline = "grey")
      self.index = index
      self.canvas.itemconfig(rectangle, outline = "blue")
      self.canvas.itemconfig("INT", text = str(index))
      self.canvas.itemconfig("HEX", text = hexf(index))
      self.load(image)

  def load(self, image):
    i = 0
    for x in xrange(5):
      for y in xrange(8):
        color = "white" if image.get(x*2, y*2) == "255 255 255" else "black"
        self.canvas.itemconfig(self.area[i], fill = color)
        i += 1

  def putpixel(self, image, x, y, color):
    image.put(color, (x*2, y*2))
    image.put(color, (x*2, y*2+1))
    image.put(color, (x*2+1, y*2))
    image.put(color, (x*2+1, y*2+1))


root = Tk()
app = Application(master = root)
app.master.title("Font Editor")
app.master.resizable(width = FALSE, height = FALSE)
app.mainloop()