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#
# The Python Imaging Library
# $Id: BdfFontFile.py 2134 2004-10-06 08:55:20Z fredrik $
#
# bitmap distribution font (bdf) file parser
#
# history:
# 1996-05-16 fl created (as bdf2pil)
# 1997-08-25 fl converted to FontFile driver
# 2001-05-25 fl removed bogus __init__ call
# 2002-11-20 fl robustification (from Kevin Cazabon, Dmitry Vasiliev)
# 2003-04-22 fl more robustification (from Graham Dumpleton)
#
# Copyright (c) 1997-2003 by Secret Labs AB.
# Copyright (c) 1997-2003 by Fredrik Lundh.
#
# See the README file for information on usage and redistribution.
#
import Image
import FontFile
import string
# --------------------------------------------------------------------
# parse X Bitmap Distribution Format (BDF)
# --------------------------------------------------------------------
bdf_slant = {
"R": "Roman",
"I": "Italic",
"O": "Oblique",
"RI": "Reverse Italic",
"RO": "Reverse Oblique",
"OT": "Other"
}
bdf_spacing = {
"P": "Proportional",
"M": "Monospaced",
"C": "Cell"
}
def bdf_char(f):
# skip to STARTCHAR
while 1:
s = f.readline()
if not s:
return None
if s[:9] == "STARTCHAR":
break
id = string.strip(s[9:])
# load symbol properties
props = {}
while 1:
s = f.readline()
if not s or s[:6] == "BITMAP":
break
i = string.find(s, " ")
props[s[:i]] = s[i+1:-1]
# load bitmap
bitmap = []
while 1:
s = f.readline()
if not s or s[:7] == "ENDCHAR":
break
bitmap.append(s[:-1])
bitmap = string.join(bitmap, "")
[x, y, l, d] = map(int, string.split(props["BBX"]))
[dx, dy] = map(int, string.split(props["DWIDTH"]))
bbox = (dx, dy), (l, -d-y, x+l, -d), (0, 0, x, y)
try:
im = Image.fromstring("1", (x, y), bitmap, "hex", "1")
except ValueError:
# deal with zero-width characters
im = Image.new("1", (x, y))
return id, int(props["ENCODING"]), bbox, im
##
# Font file plugin for the X11 BDF format.
class BdfFontFile(FontFile.FontFile):
def __init__(self, fp):
FontFile.FontFile.__init__(self)
s = fp.readline()
if s[:13] != "STARTFONT 2.1":
raise SyntaxError, "not a valid BDF file"
props = {}
comments = []
while 1:
s = fp.readline()
if not s or s[:13] == "ENDPROPERTIES":
break
i = string.find(s, " ")
props[s[:i]] = s[i+1:-1]
if s[:i] in ["COMMENT", "COPYRIGHT"]:
if string.find(s, "LogicalFontDescription") < 0:
comments.append(s[i+1:-1])
font = string.split(props["FONT"], "-")
font[4] = bdf_slant[string.upper(font[4])]
font[11] = bdf_spacing[string.upper(font[11])]
ascent = int(props["FONT_ASCENT"])
descent = int(props["FONT_DESCENT"])
fontname = string.join(font[1:], ";")
# print "#", fontname
# for i in comments:
# print "#", i
font = []
while 1:
c = bdf_char(fp)
if not c:
break
id, ch, (xy, dst, src), im = c
if ch >= 0 and ch < len(self.glyph):
self.glyph[ch] = xy, dst, src, im
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