From 74b3ab86068b80ef42cf68c8a007ffa19e6a05f5 Mon Sep 17 00:00:00 2001
From: Pablo2048 <pablo@xpablo.cz>
Date: Sat, 19 Dec 2020 11:52:57 +0100
Subject: [PATCH] Nastroj pro generovani fontu (neuplny!!!)

---
 tools/fontconv.py      | 205 +++++++++++++++++++++++++++++++++++++++++
 tools/requirements.txt |   1 +
 tools/test_fontconv.sh |   7 ++
 3 files changed, 213 insertions(+)
 create mode 100644 tools/fontconv.py
 create mode 100644 tools/requirements.txt
 create mode 100644 tools/test_fontconv.sh

diff --git a/tools/fontconv.py b/tools/fontconv.py
new file mode 100644
index 0000000..8b8f222
--- /dev/null
+++ b/tools/fontconv.py
@@ -0,0 +1,205 @@
+#http://stackoverflow.com/questions/5747739/python-render-non-anti-aliased-font-to-internal-image
+#Author: Pavel Brychta
+from PIL import Image
+from PIL import ImageFont, ImageDraw
+import sys
+import ast
+
+def character(fontname, fontsize, bitsperpixel, char):
+  """ Vykresli znak do vnitrniho povrchu a nasledne ho prevede do pole elementu intenzit,
+      ktere ma vzdy 4 bity/bod (intenzita 0-15).
+	  Vraci [rozmer obrazku v ose X, rozmer obrazku v ose Y, Prvni radek obrazku, ktery nese obrazovou informaci (offset od 0), Posledni radek obrazku, ktery nese obrazovou informaci, [pole elementu]
+  """
+  result = []
+
+  usr_font = ImageFont.truetype(fontname, fontsize)
+  imagexsize, imageysize = usr_font.getsize(char)
+  image = Image.new("RGB", (imagexsize, imageysize), "Black")
+  #image = Image.new("RGB", (320, 320), "Black")
+  # print(imagexsize, imageysize)
+  d_usr = ImageDraw.Draw(image)
+  if bitsperpixel > 1:
+    d_usr.fontmode = "L" # Zapneme antialiasovani
+  else:
+    d_usr.fontmode = "1" # Vypneme antialiasovani (pro fonty o hloubce 1bit/pixel)
+  #imagexsize, imageysize = d_usr.textsize(char, usr_font)
+  d_usr.text((0, 0), char, "White", font=usr_font)
+  #print "Imageinfosize:", ord(char), imagexsize, imageysize
+  #image.save('test_' + str(ord(char)) + '.png', 'PNG')
+  pix = image.load()
+  firstimageline = 1000
+  lastimageline = -1
+  for x in range(imagexsize):
+    for y in range(imageysize):
+      R, G, B = pix[x, y]
+      if R < 0x08:
+        outpix = 0
+      elif R < 0x18:
+        outpix = 1
+      elif R < 0x28:
+        outpix = 2
+      elif R < 0x38:
+        outpix = 3
+      elif R < 0x48:
+        outpix = 4
+      elif R < 0x58:
+        outpix = 5
+      elif R < 0x68:
+        outpix = 6
+      elif R < 0x78:
+        outpix = 7
+      elif R < 0x88:
+        outpix = 8
+      elif R < 0x98:
+        outpix = 9
+      elif R < 0xa8:
+        outpix = 10
+      elif R < 0xb8:
+        outpix = 11
+      elif R < 0xc8:
+        outpix = 12
+      elif R < 0xd8:
+        outpix = 13
+      elif R < 0xe8:
+        outpix = 14
+      else:
+        outpix = 15
+      result.append(outpix),
+      if outpix != 0:
+        if firstimageline > y:
+            firstimageline = y
+        if lastimageline < y:
+            lastimageline = y
+  if firstimageline == 1000:
+    firstimageline = imageysize >> 1
+    lastimageline = firstimageline
+  return imagexsize, imageysize, firstimageline, lastimageline, result
+
+def encodechar(chardata, bitsperpixel, firstline, height):
+  """ Prevede zadanou bitovou mapu s rozsahem 0-15 do binarniho tvaru
+      s orezem na viditelnou cast za pomoci firstline a height parametru
+  """
+  result = []
+  w, h, rawdata = chardata
+  # print(rawdata)
+  # print(chardata)
+  # print(firstline, w, len(rawdata))
+  # print(firstline, h, height, len(rawdata))
+
+  index = 0
+  for x in range(w):
+    posBit = 0
+    outdata = 0
+    for y in range(h):
+      if (y >= firstline) and (y <= (height + firstline)):
+        data = rawdata[index] >> 3
+        mask = data << posBit
+        outdata |= mask
+        posBit += 1
+        if posBit > 7:
+            result.append(outdata)
+            posBit = 0
+            outdata = 0
+      index += 1
+    if posBit != 0:
+      result.append(outdata)
+  # optimalizace dat (odstraneni poslednich bytu, ktere jsou nulove)
+  while len(result) > 1 and result[-1] == 0:
+    del result[-1]
+  return result
+
+def buildfontname(fontname, ptsize, charfrom, charto, bitsperpixel, reduceheight, codepage):
+  """ Build ID of the font
+  """
+  result = "Font"
+  result += fontname.split(".")[0] + "_"
+  result += "{0}pt_".format(ptsize)
+  result += "{0:02X}_".format(charfrom)
+  result += "{0:02X}_".format(charto)
+  return result
+
+def createfont(fontname, ptsize, charfrom, charto, bitsperpixel, reduceheight, codepage):
+  """ Write Font file
+  """
+  fontminline = 65535
+  fontmaxline = 0
+  fontrawdata = []
+  fontheight = 0
+  fontvaliddata = []
+  fontoffsets = []
+  fontsizes = []
+  actualoffset = 0
+  fontmonospacewidth = 0
+
+  for c in range(charfrom, charto + 1):
+    encchar = chr(c)
+    fchar = character(fontname, ptsize, bitsperpixel, encchar)
+    w, h, ymin, ymax, dummy = fchar
+    if w > fontmonospacewidth:
+      fontmonospacewidth = w # znak je zatim nejsirsi - zapamatujeme si jeho sirku pro monospace vystup
+    fontrawdata.append((w, h, dummy))
+    if ymin < fontminline:
+      fontminline = ymin # znak zacina drive nez predchozi (ve vyssim bode), zapamatujeme si pocatek
+    if ymax > fontmaxline:
+      fontmaxline = ymax # znak konci pozdeji nez predchozi (v nizsim bode), zapamatujeme si konec
+  if reduceheight:
+    fontheight = fontmaxline - fontminline + 1 # vypocitame si vysku skutecneho pismena
+  else:
+    fontminline = 0
+    fontheight = h
+
+  for c in fontrawdata:
+    fontoffsets.append(actualoffset)
+    fontchar = encodechar(c, bitsperpixel, fontminline, fontheight)
+    fontvaliddata.append(fontchar)
+    fontsizes.append(len(fontchar))
+    actualoffset += len(fontchar)
+
+  OutFile = open(buildfontname(fontname, ptsize, charfrom, charto, 1, reduceheight, codepage) + ".c", 'w')
+  OutFile.write("/* Font resource created by fontconv.py (c) 2020 by Pavel Brychta (1 bit per pixel)*/\n")
+  OutFile.write("const uint8_t " + buildfontname(fontname, ptsize, charfrom, charto, 1, reduceheight, codepage) + "[] PROGMEM =\n{\n")
+  OutFile.write("\t{0}, /* width for monospace output */\n".format(fontmonospacewidth))
+  OutFile.write("\t{0}, /* font height */\n".format(fontheight))
+  OutFile.write("\t{0}, /* first char ID */\n".format(charfrom))
+  OutFile.write("\t{0}, /* number of characters */\n".format(charto - charfrom + 1))
+  OutFile.write("\t/* index table: offset MSB, offset LSB, length, width */\n")
+  ptr = 0
+  for o in fontoffsets:
+    f = fontrawdata[ptr]
+    OutFile.write("\t0x{0:02X},".format((o >> 8) & 0xff)) # MSB
+    OutFile.write("0x{0:02X},".format(o & 0xff)) # LSB
+    OutFile.write("0x{0:02X},".format(fontsizes[ptr])) # length
+    OutFile.write("0x{0:02X},".format(f[0])) # width
+    OutFile.write("\n")
+    ptr += 1
+  OutFile.write("\t/* glyph raw */")
+  count = 0
+  for c in fontvaliddata:
+    for u in c:
+      if 0 == count:
+        OutFile.write("\n\t")
+      OutFile.write("0x{0:02X}".format(u))
+      count += 1
+      if 20 == count:
+        count = 0
+      OutFile.write(",")
+  OutFile.write("\n};\n")
+  OutFile.close()
+
+def main(argv):
+  if len(argv) != 8:
+    sys.stderr.write("Invalid number of parameters.")
+    return 1
+  else:
+    fontname = argv[1] # jmeno fontu
+    fontsize = int(argv[2]) # velikost fontu (vyska v bodech)
+    charfrom = ast.literal_eval(argv[3]) # kod prvniho znaku, ktery bude ve vyslednem fontu ulozeny
+    charto = ast.literal_eval(argv[4]) # kod posledniho znaku, ktery bude ve vyslednem fontu ulozeny
+    bitsperpixel = int(argv[5]) # pocet bitu/pixel. Platne hodnoty jsou 1, 2, 4
+    reduceheight = int(argv[6]) # priznak, zda do vysledneho fontu neukladat "mrtve" oblasti (spocita skutecnou vysku nejvyssiho znaku a na tuto vysku prepocita vsechny ostatni znaky)
+    codepage = argv[7] # pouzita kodova stranka pro narodni znaky (diakritiku)
+    createfont(fontname, fontsize, charfrom, charto, bitsperpixel, reduceheight, codepage)
+    return 0
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv))
diff --git a/tools/requirements.txt b/tools/requirements.txt
new file mode 100644
index 0000000..b338169
--- /dev/null
+++ b/tools/requirements.txt
@@ -0,0 +1 @@
+PIL
diff --git a/tools/test_fontconv.sh b/tools/test_fontconv.sh
new file mode 100644
index 0000000..ab94dd9
--- /dev/null
+++ b/tools/test_fontconv.sh
@@ -0,0 +1,7 @@
+# python3 fontconv.py "built titling lt.ttf" 25 0x30 0xff 1 1 cp852
+# python3 fontconv.py "built_titling_lt.ttf" 25 0x20 0x3f 1 1 cp852
+# python3 fontconv.py "built_titling_lt.ttf" 60 0x30 0x39 1 1 cp852
+# python3 fontconv.py "built_titling_sb.ttf" 60 0x30 0x39 1 1 cp852
+#python3 fontconv.py "built_titling_sb.ttf" 60 0x20 0x23 1 1 cp852
+#python3 fontconv.py "built_titling_sb.ttf" 60 0x23 0x24 1 1 cp852
+python3 fontconv.py "built_titling_sb.ttf" 60 0x30 0x39 1 1 cp852