134 lines
3.2 KiB
Python
134 lines
3.2 KiB
Python
|
#
|
||
|
|
# The Python Imaging Library
|
||
|
|
# $Id$
|
||
|
|
#
|
||
|
|
# 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
|