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Diffstat (limited to 'prebuilt/twrp_fonts.py')
| -rwxr-xr-x | prebuilt/twrp_fonts.py | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/prebuilt/twrp_fonts.py b/prebuilt/twrp_fonts.py new file mode 100755 index 000000000..439240978 --- /dev/null +++ b/prebuilt/twrp_fonts.py @@ -0,0 +1,198 @@ +#!/usr/bin/env python +# -*- coding: utf8 -*- +import codecs,os,gzip,ctypes,ctypes.util,sys +from struct import * +from PIL import Image, ImageDraw, ImageFont + +# ====== Python script to convert TrueTypeFonts to TWRP's .dat format ====== +# This script was originally made by https://github.com/suky for his chinese version of TWRP +# and then translated to English by feilplane at #twrp of irc.freenode.net. +# However, it was not compatible with vanilla TWRP, so https://github.com/Tasssadar rewrote +# most of it and it now has very little in common with the original script. + +class Reference(): + def __init__(self, val): + self.__value = val + + def get(self): + return self.__value + + def set(self, val): + self.__value = val + +quiet = Reference(False) + +def log(text): + if not quiet.get(): + sys.stdout.write(text) + +def write_data(f, width, height, offsets, data): + f.write(pack("<I", width)) + f.write(pack("<I", height)) + for off in offsets: + f.write(pack("<I", off)) + f.write(data) + +if __name__ == "__main__": + fontsize = Reference(20) + out_fname = Reference("font.dat") + voffset = Reference(None) + padding = Reference(0) + font_fname = Reference(None) + preview = Reference(None) + + arg_parser = [ + ["-s", "--size=", fontsize, int], + ["-o", "--output=", out_fname, str], + ["-p", "--preview=", preview, str], + [None, "--padding=", padding, int], + ["-q", "--quiet", quiet, None], + [None, "--voffset=", voffset, int] + ] + + argv = sys.argv + argc = len(argv) + i = 1 + while i < argc: + arg = argv[i] + arg_next = argv[i+1] if i+1 < argc else None + + if arg == "--help" or arg == "-h": + print ("This script converts TrueTypeFonts to .dat file for TWRP recovery.\n\n" + "Usage: %s [SWITCHES] [TRUETYPE FILE]\n\n" + " -h, --help - print help\n" + " -o, --output=[FILE] - output file or '-' for stdout (default: font.dat)\n" + " -p, --preview=[FILE] - generate font preview to png file\n" + " --padding=[PIXELS] - horizontal padding around each character (default: 0)\n" + " -q, --quiet - Do not print any output\n" + " -s, --size=[SIZE IN PIXELS] - specify font size in points (default: 20)\n" + " --voffset=[PIXELS] - vertical offset (default: font size*0.25)\n\n" + "Example:\n" + " %s -s 40 -o ComicSans_40.dat -p preview.png ComicSans.ttf\n") % ( + sys.argv[0], sys.argv[0] + ) + exit(0) + + found = False + for p in arg_parser: + if p[0] and arg == p[0] and (arg_next or not p[3]): + if p[3]: + p[2].set(p[3](arg_next)) + else: + p[2].set(True) + i += 1 + found = True + break + elif p[1] and arg.startswith(p[1]): + if p[3]: + p[2].set(p[3](arg[len(p[1]):])) + else: + p[2].set(True) + found = True + break + + if not found: + font_fname.set(arg) + + i += 1 + + if not voffset.get(): + voffset.set(int(fontsize.get()*0.25)) + + if out_fname.get() == "-": + quiet.set(True) + + log("Loading font %s...\n" % font_fname.get()) + font = ImageFont.truetype(font_fname.get(), fontsize.get(), 0, "utf-32be") + cwidth = 0 + cheight = font.getsize('A')[1] + offsets = [] + renders = [] + data = bytes() + + # temp Image and ImageDraw to get access to textsize + res = Image.new('L', (1, 1), 0) + res_draw = ImageDraw.Draw(res) + + # Measure each character and render it to separate Image + log("Rendering characters...\n") + for i in range(32, 128): + w, h = res_draw.textsize(chr(i), font) + w += padding.get()*2 + offsets.append(cwidth) + cwidth += w + if h > cheight: + cheight = h + ichr = Image.new('L', (w, cheight*2)) + ichr_draw = ImageDraw.Draw(ichr) + ichr_draw.text((padding.get(), 0), chr(i), 255, font) + renders.append(ichr) + + # Twice the height to account for under-the-baseline characters + cheight *= 2 + + # Create the result bitmap + log("Creating result bitmap...\n") + res = Image.new('L', (cwidth, cheight), 0) + res_draw = ImageDraw.Draw(res) + + # Paste all characters into result bitmap + for i in range(len(renders)): + res.paste(renders[i], (offsets[i], 0)) + # uncomment to draw lines separating each character (for debug) + #res_draw.rectangle([offsets[i], 0, offsets[i], cheight], outline="blue") + + # crop the blank areas on top and bottom + (_, start_y, _, end_y) = res.getbbox() + res = res.crop((0, start_y, cwidth, end_y)) + cheight = (end_y - start_y) + voffset.get() + new_res = Image.new('L', (cwidth, cheight)) + new_res.paste(res, (0, voffset.get())) + res = new_res + + # save the preview + if preview.get(): + log("Saving preview to %s...\n" % preview.get()) + res.save(preview.get()) + + # Pack the data. + # The "data" is a B/W bitmap with all 96 characters next to each other + # on one line. It is as wide as all the characters combined and as + # high as the tallest character, plus padding. + # Each byte contains info about eight pixels, starting from + # highest to lowest bit: + # bits: | 7 6 5 4 3 2 1 0 | 15 14 13 12 11 10 9 8 | ... + # pixels: | 0 1 2 3 4 5 6 7 | 8 9 10 11 12 13 14 15 | ... + log("Packing data...\n") + bit = 0 + bit_itr = 0 + for c in res.tostring(): + # FIXME: How to handle antialiasing? + # if c != '\x00': + # In Python3, c is int, in Python2, c is string. Because of reasons. + try: + fill = (ord(c) >= 127) + except TypeError: + fill = (c >= 127) + if fill: + bit |= (1 << (7-bit_itr)) + bit_itr += 1 + if bit_itr >= 8: + data += pack("<B", bit) + bit_itr = 0 + bit = 0 + + # Write them to the file. + # Format: + # 000: width + # 004: height + # 008: offsets of each characters (96*uint32) + # 392: data as described above + log("Writing to %s...\n" % out_fname.get()) + if out_fname.get() == "-": + write_data(sys.stdout, cwidth, cheight, offsets, data) + else: + with open(out_fname.get(), 'wb') as f: + write_data(f, cwidth, cheight, offsets, data) + + exit(0) |