Lao Tzu
242 lines
6.9 KiB
Python
242 lines
6.9 KiB
Python
#
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# Copyright (C) 2017-2020 Dimitar Toshkov Zhekov <dimitar.zhekov@gmail.com>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the Free
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# Software Foundation; either version 2 of the License, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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import fnutil
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import fncli
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import fnio
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import bdfexp
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# -- Params --
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class Params(fncli.Params):
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def __init__(self):
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fncli.Params.__init__(self)
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self.version = -1
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self.exchange = -1
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self.output_name = None
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# -- Options --
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HELP = ('' +
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'usage: bdftopsf [-1|-2|-r] [-g|-G] [-o OUTPUT] [INPUT.bdf] [TABLE...]\n' +
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'Convert a BDF font to PC Screen Font or raw font\n' +
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'\n' +
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' -1, -2 write a PSF version 1 or 2 font (default = 1 if possible)\n' +
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' -r, --raw write a RAW font\n' +
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' -g, --vga exchange the characters at positions 0...31 with these at\n' +
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' 192...223 (default for VGA text mode compliant PSF fonts\n' +
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' with 224 to 512 characters starting with unicode 00A3)\n' +
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' -G do not exchange characters 0...31 and 192...223\n' +
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' -o OUTPUT output file (default = stdout, may not be a terminal)\n' +
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' --help display this help and exit\n' +
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' --version display the program version and license, and exit\n' +
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' --excstk display the exception stack on error\n' +
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'\n' +
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'The input must be a monospaced unicode-encoded BDF 2.1 font.\n' +
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'\n' +
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'The tables are text files with two or more hexadecimal unicodes per line:\n' +
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'a character code from the BDF, and extra code(s) for it. All extra codes\n' +
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'are stored sequentially in the PSF unicode table for their character.\n' +
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'<ss> is always specified as FFFE, although it is stored as FE in PSF2.\n')
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VERSION = 'bdftopsf 1.62, Copyright (C) 2017-2020 Dimitar Toshkov Zhekov\n\n' + fnutil.GPL2PLUS_LICENSE
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class Options(fncli.Options):
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def __init__(self):
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fncli.Options.__init__(self, ['-o'], HELP, VERSION)
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def parse(self, name, value, params):
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if name in ['-1', '-2']:
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params.version = int(name[1])
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elif name in ['-r', '--raw']:
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params.version = 0
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elif name in ['-g', '--vga']:
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params.exchange = True
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elif name == '-G':
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params.exchange = False
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elif name == '-o':
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params.output_name = value
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else:
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self.fallback(name, params)
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# -- Main --
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def main_program(nonopt, parsed):
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version = parsed.version
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exchange = parsed.exchange
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bdfile = len(nonopt) > 0 and nonopt[0].lower().endswith('.bdf')
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ver1_unicodes = True
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# READ INPUT
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ifs = fnio.InputFileStream(nonopt[0] if bdfile else None)
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font = ifs.process(bdfexp.Font.read)
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try:
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for char in font.chars:
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prefix = 'char %d: ' % char.code
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if char.bbx.width != font.bbx.width:
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raise Exception(prefix + 'output width not equal to maximum output width')
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if char.code == 65534:
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raise Exception(prefix + 'not a character, use 65535 for empty position')
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if char.code >= 65536:
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if version == 1:
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raise Exception(prefix + '-1 requires unicodes <= 65535')
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ver1_unicodes = False
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# VERSION
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ver1_num_chars = len(font.chars) == 256 or len(font.chars) == 512
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if version == 1:
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if not ver1_num_chars:
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raise Exception('-1 requires a font with 256 or 512 characters')
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if font.bbx.width != 8:
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raise Exception('-1 requires a font with width 8')
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# EXCHANGE
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vga_num_chars = len(font.chars) >= 224 and len(font.chars) <= 512
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vga_text_size = font.bbx.width == 8 and font.bbx.height in [8, 14, 16]
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if exchange is True:
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if not vga_num_chars:
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raise Exception('-g/--vga requires a font with 224...512 characters')
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if not vga_text_size:
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raise Exception('-g/--vga requires an 8x8, 8x14 or 8x16 font')
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except Exception as ex:
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ex.message = ifs.location() + getattr(ex, 'message', str(ex))
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raise
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# READ TABLES
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tables = dict()
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def load_extra(line):
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nonlocal ver1_unicodes
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words = line.split()
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if len(words) < 2:
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raise Exception('invalid format')
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uni = fnutil.parse_hex('unicode', words[0])
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if uni == 0xFFFE:
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raise Exception('FFFE is not a character')
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if next((char for char in font.chars if char.code == uni), None):
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if uni > fnutil.UNICODE_BMP_MAX:
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ver1_unicodes = False
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if uni not in tables:
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tables[uni] = []
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table = tables[uni]
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for word in words[1:]:
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dup = fnutil.parse_hex('extra code', word)
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if dup == 0xFFFF:
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raise Exception('FFFF is not a character')
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if dup > fnutil.UNICODE_BMP_MAX:
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ver1_unicodes = False
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if not dup in table or 0xFFFE in table:
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tables[uni].append(dup)
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if version == 1 and not ver1_unicodes:
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raise Exception('-1 requires unicodes <= %X' % fnutil.UNICODE_BMP_MAX)
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for table_name in nonopt[int(bdfile):]:
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fnio.read_file(table_name, lambda ifs: ifs.read_lines(load_extra))
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# VERSION
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if version == -1:
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version = 1 if ver1_num_chars and ver1_unicodes and font.bbx.width == 8 else 2
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# EXCHANGE
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if exchange == -1:
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exchange = vga_text_size and version >= 1 and vga_num_chars and font.chars[0].code == 0x00A3
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if exchange:
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font.chars = font.chars[192:224] + font.chars[32:192] + font.chars[0:32] + font.chars[224:]
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# WRITE
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def write_psf(output):
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# HEADER
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if version == 1:
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output.write8(0x36)
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output.write8(0x04)
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output.write8((len(font.chars) >> 8) + 1)
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output.write8(font.bbx.height)
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elif version == 2:
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output.write32(0x864AB572)
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output.write32(0x00000000)
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output.write32(0x00000020)
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output.write32(0x00000001)
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output.write32(len(font.chars))
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output.write32(len(font.chars[0].data))
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output.write32(font.bbx.height)
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output.write32(font.bbx.width)
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# GLYPHS
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for char in font.chars:
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output.write(char.data)
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# UNICODES
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if version > 0:
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def write_unicode(code):
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if version == 1:
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output.write16(code)
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elif code <= 0x7F:
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output.write8(code)
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elif code in [0xFFFE, 0xFFFF]:
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output.write8(code & 0xFF)
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else:
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if code <= 0x7FF:
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output.write8(0xC0 + (code >> 6))
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else:
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if code <= 0xFFFF:
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output.write8(0xE0 + (code >> 12))
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else:
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output.write8(0xF0 + (code >> 18))
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output.write8(0x80 + ((code >> 12) & 0x3F))
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output.write8(0x80 + ((code >> 6) & 0x3F))
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output.write8(0x80 + (code & 0x3F))
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for char in font.chars:
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if char.code != 0xFFFF:
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write_unicode(char.code)
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if char.code in tables:
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for extra in tables[char.code]:
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write_unicode(extra)
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write_unicode(0xFFFF)
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fnio.write_file(parsed.output_name, write_psf, encoding=None)
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if __name__ == '__main__':
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fncli.start('bdftopsf.py', Options(), Params(), main_program)
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