262 lines
10 KiB
Python
Executable File
262 lines
10 KiB
Python
Executable File
#!/usr/bin/env python3
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import bz2
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import math
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import re
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import argparse
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CP_MAX = 0x10FFFF
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FONT_CPP = "data/font.bz2"
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FONT_HEIGHT = 12
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class ReadBDFError(RuntimeError):
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def __init__(self, line_number, message):
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super().__init__(self, 'line %i: %s' % (line_number, message))
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class FontTool:
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def __init__(self):
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with open(FONT_CPP, 'rb') as font_cpp:
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font_cpp_data = bz2.decompress(font_cpp.read())
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i = 0
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self.code_points = [False for _ in range(CP_MAX + 2)]
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while i < len(font_cpp_data):
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cp = font_cpp_data[i] | (font_cpp_data[i + 1] << 8) | (font_cpp_data[i + 2] << 16)
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width = font_cpp_data[i + 3]
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n = i + 4 + 3 * width
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self.code_points[cp] = font_cpp_data[(i + 3): n]
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i = n
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def commit(self):
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l = []
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for i, data in enumerate(self.code_points):
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if data:
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l.append(i & 0xFF)
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l.append((i >> 8) & 0xFF)
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l.append((i >> 16) & 0xFF)
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l += data
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with open(FONT_CPP, 'wb') as font_cpp:
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font_cpp.write(bz2.compress(bytes(l)))
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def pack(cp_matrix):
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width = 0
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for row in cp_matrix:
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if width < len(row):
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width = len(row)
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cp_data = [width]
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bits = 8
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for row in cp_matrix:
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padded = row + [0] * (width - len(row))
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for cv in padded:
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if bits == 8:
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cp_data.append(0)
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bits = 0
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cp_data[-1] |= (cv & 3) << bits
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bits += 2
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return cp_data
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def unpack(cp_data):
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ptr = 1
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bits = 0
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buf = 0
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cp_matrix = []
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for y in range(FONT_HEIGHT):
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cp_matrix.append([])
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for x in range(cp_data[0]):
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if bits == 0:
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buf = cp_data[ptr]
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ptr += 1
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bits = 8
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cp_matrix[-1].append(buf & 3)
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buf >>= 2
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bits -= 2
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return cp_matrix
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class RawReader:
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def __init__(self, path):
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self.code_points = [False for _ in range(CP_MAX + 2)]
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with open(path) as raw:
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items = [int(v) for v in re.findall(r'[0-9]+', raw.read())]
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ptr = 0
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while ptr <= len(items) - 2:
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cp = items[ptr]
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width = items[ptr + 1]
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ptr += 2
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matrix = []
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for i in range(ptr, ptr + width * FONT_HEIGHT, width):
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matrix.append(items[i: (i + width)])
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ptr += width * FONT_HEIGHT
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self.code_points[cp] = FontTool.pack(matrix)
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class BDFReader:
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def __init__(self, path, xoffs, yoffs):
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self.code_points = [False for _ in range(CP_MAX + 2)]
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item_re = re.compile(r'[^ \n\r]+')
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with open(path) as bdf:
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global_dw = False
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startchar = False
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bitmap = False
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char_dw = False
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char_cp = False
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char_bbx = False
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skip = 0
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for line_number, line in enumerate(bdf):
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if skip:
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skip -= 1
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continue
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items = re.findall(item_re, line)
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if startchar and items[0] == 'ENDCHAR':
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if len(bitmap) != char_bbx[1]:
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raise ReadBDFError(line_number, "invalid bitmap data")
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cp_matrix = []
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for y in range(FONT_HEIGHT):
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cp_matrix.append([])
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for x in range(char_dw):
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cv = 0
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xx = x + xoffs
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yy = FONT_HEIGHT - 1 - y + yoffs
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if char_bbx[2] <= xx < char_bbx[0] + char_bbx[2] and char_bbx[3] <= yy < char_bbx[1] + \
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char_bbx[3]:
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cv = bitmap[char_bbx[1] - 1 - (yy - char_bbx[3])][xx - char_bbx[2]] * 3
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cp_matrix[-1].append(cv)
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self.code_points[char_cp] = FontTool.pack(cp_matrix)
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startchar = False
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bitmap = False
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char_dw = False
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char_cp = False
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char_bbx = False
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elif bitmap != False:
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if len(items) != 1:
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raise ReadBDFError(line_number, "missing bitmap data")
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bits = []
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for ch in items[0]:
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cv = int(ch, 16)
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bits += [cv & 8 and 1 or 0, cv & 4 and 1 or 0, cv & 2 and 1 or 0, cv & 1 and 1 or 0]
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bitmap.append(bits[: char_bbx[0]])
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elif items[0] == 'SIZE':
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if len(items) != 4:
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raise ReadBDFError(line_number, "invalid directive")
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elif items[0] == 'FONTBOUNDINGBOX':
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if len(items) != 5:
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raise ReadBDFError(line_number, "invalid directive")
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elif not startchar and items[0] == 'STARTCHAR':
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startchar = True
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char_dw = global_dw
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elif items[0] == 'STARTPROPERTIES':
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if len(items) != 2:
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raise ReadBDFError(line_number, "invalid directive")
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skip = int(items[1]) + 1
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elif startchar and items[0] == 'BITMAP':
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bitmap = []
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elif startchar and items[0] == 'BBX':
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if len(items) != 5:
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raise ReadBDFError(line_number, "invalid directive")
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char_bbx = [int(items[1]), int(items[2]), int(items[3]), int(items[4])]
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elif startchar and items[0] == 'ENCODING':
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if len(items) != 2:
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raise ReadBDFError(line_number, "invalid directive")
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char_cp = int(items[1])
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elif items[0] == 'METRICSSET':
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if len(items) != 2:
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raise ReadBDFError(line_number, "invalid directive")
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if int(items[1]) == 1:
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raise ReadBDFError(line_number, "font does not support writing direction 0")
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elif items[0] == 'DWIDTH':
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if len(items) != 3:
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raise ReadBDFError(line_number, "invalid directive")
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if int(items[2]) != 0:
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raise ReadBDFError(line_number, "vertical component of dwidth vector is non-zero")
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char_dw = int(items[1])
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if not startchar:
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global_dw = char_dw
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if __name__ == "__main__":
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parser = argparse.ArgumentParser("fonttool.py", description="font tools for managing fonts, this script can be"
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" imported as a module",
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fromfile_prefix_chars="@")
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command = parser.add_subparsers(dest="command", required=True)
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addbdf = command.add_parser("addbdf", help="Adds BDF Formated Font")
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addbdf.add_argument("first", metavar="FIRST", type=int)
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addbdf.add_argument("last", metavar="LAST", type=int)
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addbdf.add_argument("bdffile", metavar="BDFFILE", help="BDF is an archaic bitmap font format")
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addbdf.add_argument("xoffs", metavar="XOFFS", nargs="?", default=0, type=int, help="Defaults to 0")
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addbdf.add_argument("yoffs", metavar="YOFFS", nargs="?", default=0, type=int, help="Defaults to 0")
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addraw = command.add_parser("addraw", help="Adds a Raw Formated Font")
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addraw.add_argument("first", metavar="FIRST", type=int)
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addraw.add_argument("last", metavar="LAST", type=int)
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addraw.add_argument("rawfile", metavar="RAWFILE", help=""""Raw" files are simply ASCII-encoded white-space delimited \
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lists
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of decimal integer constants. These lists of integers encode
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characters as any number of consecutive character description
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structures laid out as follows:
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* the code point corresponding to the character being described;
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* the width in pixels of the character being described;
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* width times %i brightness levels between 0 and 3, a row-major matrix.""")
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remove = command.add_parser("remove", help="Remove")
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remove.add_argument("first", metavar="FIRST", type=int)
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remove.add_argument("last", metavar="LAST", type=int, default=None, nargs="?", help="Defaults to FIRST")
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copy = command.add_parser("copy", help="Copy")
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copy.add_argument("dest", metavar="DSTFIRST", type=int)
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copy.add_argument("first", metavar="SRCFIRST", type=int)
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copy.add_argument("last", metavar="SRCLAST", type=int, default=None, nargs="?", help="Defaults to SRCFIRST")
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inspect = command.add_parser("inspect", help="Inspect")
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inspect.add_argument("first", metavar="FIRST", type=int)
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inspect.add_argument("last", metavar="LAST", type=int, default=None, nargs="?", help="Defaults to FIRST")
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args = parser.parse_args()
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cp_first = args.first
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if args.last is None:
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cp_last = cp_first
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else:
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cp_last = args.last
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if cp_first < 0 or cp_last > CP_MAX or cp_first > cp_last:
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print('invalid range')
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exit(1)
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ft = FontTool()
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if args.command == "addbdf":
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xoffs = args.xoffs
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yoffs = args.yoffs
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bdfr = BDFReader(args.bdffile, xoffs, yoffs)
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for i in range(cp_first, cp_last + 1):
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if bdfr.code_points[i] and not ft.code_points[i]:
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ft.code_points[i] = bdfr.code_points[i]
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ft.commit()
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elif args.command == 'addraw':
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rr = RawReader(args.rawfile)
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for i in range(cp_first, cp_last + 1):
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if rr.code_points[i] and not ft.code_points[i]:
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ft.code_points[i] = rr.code_points[i]
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ft.commit()
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elif args.command == 'remove':
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for i in range(cp_first, cp_last + 1):
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ft.code_points[i] = False
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ft.commit()
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elif args.command == 'copy':
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for i in range(cp_first, cp_last + 1):
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ft.code_points[i + (args.dest - cp_first)] = ft.code_points[i]
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ft.commit()
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elif args.command == 'inspect':
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lut = [' ', '░░', '▒▒', '▓▓']
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for i in range(cp_first, cp_last + 1):
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if ft.code_points[i]:
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print('code point %i (%c)' % (i, i))
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print('')
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print('\n'.join([''.join([lut[ch] for ch in row]) for row in FontTool.unpack(ft.code_points[i])]))
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print('')
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else:
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print('code point %i (%c) is not available' % (i, i))
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