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SF.net SVN: matplotlib: [3834] trunk/matplotlib/lib/matplotlib
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From: <jo...@us...> - 2007-09-12 07:16:51
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Revision: 3834
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=3834&view=rev
Author: jouni
Date: 2007-09-12 00:04:38 -0700 (Wed, 12 Sep 2007)
Log Message:
-----------
Further development of dviread. It now attempts to read virtual fonts,
but the positioning is still somewhat off.
Modified Paths:
--------------
trunk/matplotlib/lib/matplotlib/backends/backend_pdf.py
trunk/matplotlib/lib/matplotlib/dviread.py
Modified: trunk/matplotlib/lib/matplotlib/backends/backend_pdf.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/backends/backend_pdf.py 2007-09-11 19:40:27 UTC (rev 3833)
+++ trunk/matplotlib/lib/matplotlib/backends/backend_pdf.py 2007-09-12 07:04:38 UTC (rev 3834)
@@ -491,6 +491,7 @@
return fontdictObject
def embedType1(self, filename, fontinfo):
+ # TODO: font effects such as SlantFont
fh = open(filename, 'rb')
matplotlib.verbose.report(
'Embedding Type 1 font ' + filename, 'debug')
@@ -520,8 +521,15 @@
if fontinfo.encodingfile is not None:
enc = dviread.Encoding(fontinfo.encodingfile)
- widths = [ afmdata.get_width_from_char_name(ch)
- for ch in enc ]
+ widths = []
+ for ch in enc:
+ try:
+ widths.append(afmdata.get_width_from_char_name(ch))
+ except KeyError:
+ matplotlib.verbose.report(
+ 'No width for %s in %s' % (ch, fullname), 'debug')
+ widths.append(0)
+
differencesArray = [ Name(ch) for ch in enc ]
differencesArray = [ 0 ] + differencesArray
firstchar = 0
@@ -538,11 +546,24 @@
firstchar = not_None.next()
lastchar = max(not_None)
widths = widths[firstchar:lastchar+1]
+ for i,w in enumerate(widths):
+ if w is None: widths[i] = 0
- differencesArray = [ firstchar ]
+ differencesArray = [ ]
+ need_idx = True
for ch in range(firstchar, lastchar+1):
- differencesArray.append(Name(
- afmdata.get_name_char(ch, isord=True)))
+ try:
+ name = afmdata.get_name_char(ch, isord=True)
+ if need_idx:
+ differencesArray.append(ch)
+ need_idx = False
+ differencesArray.append(Name(name))
+ except KeyError:
+ matplotlib.verbose.report(
+ 'No name for glyph %d in %s' % (ch, fullname),
+ 'debug')
+ need_idx = True
+
fontdict = {
'Type': Name('Font'),
@@ -1448,17 +1469,16 @@
# Gather font information and do some setup for combining
# characters into strings.
- oldfontnum, seq = None, []
- for x1, y1, fontnum, glyph, width in page.text:
- if fontnum != oldfontnum:
- texname, fontsize = dvi.fontinfo(fontnum)
- fontinfo = self.tex_font_mapping(texname)
+ oldfont, seq = None, []
+ for x1, y1, dvifont, glyph, width in page.text:
+ if dvifont != oldfont:
+ fontinfo = self.tex_font_mapping(dvifont.texname)
pdfname = self.file.fontName(fontinfo.filename)
self.file.fontInfo[pdfname] = Bunch(
encodingfile=fontinfo.encoding,
afmfile=fontinfo.afm)
- seq += [['font', pdfname, fontsize]]
- oldfontnum = fontnum
+ seq += [['font', pdfname, dvifont.size]]
+ oldfont = dvifont
seq += [['text', x1, y1, [chr(glyph)], x1+width]]
seq += [('end',)]
Modified: trunk/matplotlib/lib/matplotlib/dviread.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/dviread.py 2007-09-11 19:40:27 UTC (rev 3833)
+++ trunk/matplotlib/lib/matplotlib/dviread.py 2007-09-12 07:04:38 UTC (rev 3834)
@@ -9,15 +9,13 @@
for page in dvi: # iterate over pages
w, h, d = page.width, page.height, page.descent
for x,y,font,glyph,width in page.text:
- fontname, pointsize = dvi.fontinfo(font)
+ fontname = font.texname
+ pointsize = font.size
...
for x,y,height,width in page.boxes:
...
"""
-# TODO: support TeX virtual fonts (*.vf) which are a sort of
-# subroutine collections for dvi files
-
import matplotlib
import matplotlib.cbook as mpl_cbook
import numpy as npy
@@ -85,8 +83,7 @@
x,y,h,w = elt
e = 0 # zero depth
else: # glyph
- x,y,f,g,w = elt
- font = self.fonts[f]
+ x,y,font,g,w = elt
h = (font.scale * font.tfm.height[g]) >> 20
e = (font.scale * font.tfm.depth[g]) >> 20
minx = min(minx, x)
@@ -96,7 +93,8 @@
maxy_pure = max(maxy_pure, y)
d = self.dpi / (72.27 * 2**16) # from TeX's "scaled points" to dpi units
- text = [ ((x-minx)*d, (maxy-y)*d, f, g, w*d) for (x,y,f,g,w) in self.text ]
+ text = [ ((x-minx)*d, (maxy-y)*d, DviFont(f), g, w*d)
+ for (x,y,f,g,w) in self.text ]
boxes = [ ((x-minx)*d, (maxy-y)*d, h*d, w*d) for (x,y,h,w) in self.boxes ]
return mpl_cbook.Bunch(text=text, boxes=boxes,
@@ -104,14 +102,6 @@
height=(maxy_pure-miny)*d,
descent=(maxy-maxy_pure)*d)
- def fontinfo(self, f):
- """
- texname, pointsize = dvi.fontinfo(fontnum)
-
- Name and size in points (Adobe points, not TeX points).
- """
- return self.fonts[f].name, self.fonts[f].scale * (72.0 / (72.27 * 2**16))
-
def _read(self):
"""
Read one page from the file. Return True if successful,
@@ -235,17 +225,21 @@
# I think we can assume this is constant
self.state = _dvistate.outer
- def _width_of(self, char):
- font = self.fonts[self.f]
- width = font.tfm.width[char]
- width = (width * font.scale) >> 20
- return width
+ def _width_of(self, char, font):
+ width = font.tfm.width.get(char, None)
+ if width is not None:
+ return (width * font.scale) >> 20
+ matplotlib.verbose.report(
+ 'No width for char %d in font %s' % (char, font.name),
+ 'debug')
+ return 0
+
def _set_char(self, char):
if self.state != _dvistate.inpage:
raise ValueError, "misplaced set_char in dvi file"
self._put_char(char)
- self.h += self._width_of(char)
+ self.h += self._width_of(char, self.fonts[self.f])
def _set_rule(self, a, b):
if self.state != _dvistate.inpage:
@@ -256,7 +250,15 @@
def _put_char(self, char):
if self.state != _dvistate.inpage:
raise ValueError, "misplaced put_char in dvi file"
- self.text.append((self.h, self.v, self.f, char, self._width_of(char)))
+ font = self.fonts[self.f]
+ if font.vf is None:
+ self.text.append((self.h, self.v, font, char,
+ self._width_of(char, font)))
+ else:
+ self.text.extend([(self.h + x, self.v + y, f, g, w)
+ for x, y, f, g, w in font.vf[char].text])
+ self.boxes.extend([(self.h + x, self.v + y, a, b)
+ for x, y, a, b in font.vf[char].boxes])
def _put_rule(self, a, b):
if self.state != _dvistate.inpage:
@@ -269,8 +271,8 @@
def _bop(self, c0, c1, c2, c3, c4, c5, c6, c7, c8, c9, p):
if self.state != _dvistate.outer:
- print '+++', self.state
- raise ValueError, "misplaced bop in dvi file"
+ raise ValueError, \
+ "misplaced bop in dvi file (state %d)" % self.state
self.state = _dvistate.inpage
self.h, self.v, self.w, self.x, self.y, self.z = 0, 0, 0, 0, 0, 0
self.stack = []
@@ -345,16 +347,18 @@
'debug')
def _fnt_def(self, k, c, s, d, a, l, n):
- filename = find_tex_file(n[-l:] + '.tfm')
- tfm = Tfm(filename)
+ tfm = _tfmfile(n[-l:])
if c != 0 and tfm.checksum != 0 and c != tfm.checksum:
raise ValueError, 'tfm checksum mismatch: %s'%n
# It seems that the assumption behind the following check is incorrect:
#if d != tfm.design_size:
# raise ValueError, 'tfm design size mismatch: %d in dvi, %d in %s'%\
# (d, tfm.design_size, n)
- self.fonts[k] = mpl_cbook.Bunch(scale=s, tfm=tfm, name=n)
+ vf = _vffile(n[-l:])
+
+ self.fonts[k] = mpl_cbook.Bunch(scale=s, tfm=tfm, name=n, vf=vf)
+
def _post(self):
if self.state != _dvistate.outer:
raise ValueError, "misplaced post in dvi file"
@@ -365,6 +369,121 @@
def _post_post(self):
raise NotImplementedError
+class DviFont(object):
+ __slots__ = ('texname', 'size')
+
+ def __init__(self, f):
+ """
+ Object that holds a font's texname and size and supports comparison.
+
+ The size is in Adobe points (converted from TeX points).
+ """
+ # TODO: would it make more sense to have the size in dpi units?
+ self.texname = f.name
+ self.size = f.scale * (72.0 / (72.27 * 2**16))
+
+ def __eq__(self, other):
+ return self.__class__ == other.__class__ and \
+ self.texname == other.texname and self.size == other.size
+
+ def __ne__(self, other):
+ return not self.__eq__(other)
+
+class Vf(Dvi):
+ """
+ A virtual font (*.vf file) containing subroutines for dvi files.
+
+ Usage:
+ vf = Vf(filename)
+ glyph = vf[code]
+ glyph.text, glyph.boxes, glyph.width
+ """
+
+ def __init__(self, filename):
+ Dvi.__init__(self, filename, 0)
+ self._first_font = None
+ self._chars = {}
+ self._packet_ends = None
+ self._read()
+ self.close()
+
+ def __getitem__(self, code):
+ return self._chars[code]
+
+ def _dispatch(self, byte):
+ # If we are in a packet, execute the dvi instructions
+ if self.state == _dvistate.inpage:
+ byte_at = self.file.tell()-1
+ if byte_at == self._packet_ends:
+ self._finalize_packet()
+ # fall through
+ elif byte_at > self._packet_ends:
+ raise ValueError, "Packet length mismatch in vf file"
+ else:
+ if byte in (139, 140) or byte >= 243:
+ raise ValueError, "Inappropriate opcode %d in vf file" % byte
+ Dvi._dispatch(self, byte)
+ return
+
+ # We are outside a packet
+ if byte < 242: # a short packet (length given by byte)
+ cc, tfm = self._arg(1), self._arg(3)
+ self._init_packet(byte, cc, tfm)
+ elif byte == 242: # a long packet
+ pl, cc, tfm = [ self._arg(x) for x in (4, 4, 4) ]
+ self._init_packet(pl, cc, tfm)
+ elif 243 <= byte <= 246:
+ Dvi._dispatch(self, byte)
+ elif byte == 247: # preamble
+ i, k = self._arg(1), self._arg(1)
+ x = self.file.read(k)
+ cs, ds = self._arg(4), self._arg(4)
+ self._pre(i, x, cs, ds)
+ elif byte == 248: # postamble (just some number of 248s)
+ self.state = _dvistate.post_post
+ else:
+ raise ValueError, "unknown vf opcode %d" % byte
+
+ def _init_packet(self, pl, cc, tfm):
+ if self.state != _dvistate.outer:
+ raise ValueError, "Misplaced packet in vf file"
+ self.state = _dvistate.inpage
+ self._packet_ends = self.file.tell() + pl
+ self._packet_char = cc
+ self._packet_width = tfm
+ self.h, self.v, self.w, self.x, self.y, self.z = 0, 0, 0, 0, 0, 0
+ self.stack, self.text, self.boxes = [], [], []
+ self.f = self._first_font
+
+ def _finalize_packet(self):
+ self._chars[self._packet_char] = mpl_cbook.Bunch(
+ text=self.text, boxes=self.boxes, width = self._packet_width)
+ self.state = _dvistate.outer
+
+ def _pre(self, i, x, cs, ds):
+ if self.state != _dvistate.pre:
+ raise ValueError, "pre command in middle of vf file"
+ if i != 202:
+ raise ValueError, "Unknown vf format %d" % i
+ matplotlib.verbose.report('vf file comment: ' + x, 'debug')
+ self.state = _dvistate.outer
+ # cs = checksum, ds = design size
+
+ def _fnt_def(self, k, *args):
+ Dvi._fnt_def(self, k, *args)
+ if self._first_font is None:
+ self._first_font = k
+
+def fix2comp(num):
+ """
+ Convert from two's complement to negative.
+ """
+ assert 0 <= num < 2**32
+ if num & 2**31:
+ return num - 2**32
+ else:
+ return num
+
class Tfm(object):
"""
A TeX Font Metric file. This implementation covers only the bare
@@ -380,12 +499,16 @@
"""
def __init__(self, filename):
+ matplotlib.verbose.report('opening tfm file ' + filename, 'debug')
file = open(filename, 'rb')
try:
header1 = file.read(24)
lh, bc, ec, nw, nh, nd = \
struct.unpack('!6H', header1[2:14])
+ matplotlib.verbose.report(
+ 'lh=%d, bc=%d, ec=%d, nw=%d, nh=%d, nd=%d' % (
+ lh, bc, ec, nw, nh, nd), 'debug')
header2 = file.read(4*lh)
self.checksum, self.design_size = \
struct.unpack('!2I', header2[:8])
@@ -399,12 +522,12 @@
self.width, self.height, self.depth = {}, {}, {}
widths, heights, depths = \
- [ struct.unpack('!%dI' % n, x)
- for n,x in [(nw, widths), (nh, heights), (nd, depths)] ]
+ [ struct.unpack('!%dI' % (len(x)/4), x)
+ for x in (widths, heights, depths) ]
for i in range(ec-bc):
- self.width[bc+i] = widths[ord(char_info[4*i])]
- self.height[bc+i] = heights[ord(char_info[4*i+1]) >> 4]
- self.depth[bc+i] = depths[ord(char_info[4*i+1]) & 0xf]
+ self.width[bc+i] = fix2comp(widths[ord(char_info[4*i])])
+ self.height[bc+i] = fix2comp(heights[ord(char_info[4*i+1]) >> 4])
+ self.depth[bc+i] = fix2comp(depths[ord(char_info[4*i+1]) & 0xf])
class PsfontsMap(object):
@@ -530,9 +653,12 @@
# Expecting something like /FooEncoding [
if '[' in line:
state = 1
- line = line[line.index('[')+1].strip()
+ line = line[line.index('[')+1:].strip()
if state == 1:
+ if ']' in line: # ] def
+ line = line[:line.index(']')]
+ state = 2
words = line.split()
for w in words:
if w.startswith('/'):
@@ -541,10 +667,6 @@
result.extend(subwords[1:])
else:
raise ValueError, "Broken name in encoding file: " + w
-
- # Expecting ] def
- if ']' in line:
- break
return result
@@ -572,6 +694,32 @@
return result
+_tfmcache = {}
+_vfcache = {}
+
+def _fontfile(texname, class_, suffix, cache):
+ try:
+ return cache[texname]
+ except KeyError:
+ pass
+
+ filename = find_tex_file(texname + suffix)
+ if filename:
+ result = class_(filename)
+ else:
+ result = None
+
+ cache[texname] = result
+ return result
+
+def _tfmfile(texname):
+ return _fontfile(texname, Tfm, '.tfm', _tfmcache)
+
+def _vffile(texname):
+ return _fontfile(texname, Vf, '.vf', _vfcache)
+
+
+
if __name__ == '__main__':
matplotlib.verbose.set_level('debug')
dvi = Dvi('foo.dvi', 72)
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