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SF.net SVN: matplotlib: [3690] trunk/matplotlib/lib/matplotlib
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From: <md...@us...> - 2007-08-09 14:24:59
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Revision: 3690
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=3690&view=rev
Author: mdboom
Date: 2007-08-09 07:23:46 -0700 (Thu, 09 Aug 2007)
Log Message:
-----------
Add support for Unicode fonts (char codes > 255) in PDF with Type 3
fonts. (Type 42 fonts were supported as of a preceding commit.)
Modified Paths:
--------------
trunk/matplotlib/lib/matplotlib/backends/backend_pdf.py
trunk/matplotlib/lib/matplotlib/mathtext.py
Modified: trunk/matplotlib/lib/matplotlib/backends/backend_pdf.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/backends/backend_pdf.py 2007-08-09 09:02:13 UTC (rev 3689)
+++ trunk/matplotlib/lib/matplotlib/backends/backend_pdf.py 2007-08-09 14:23:46 UTC (rev 3690)
@@ -5,7 +5,6 @@
"""
from __future__ import division
-import md5
import os
import re
import sys
@@ -28,9 +27,10 @@
from matplotlib.font_manager import fontManager
from matplotlib.afm import AFM
from matplotlib.dviread import Dvi
-from matplotlib.ft2font import FT2Font, FIXED_WIDTH, ITALIC, LOAD_NO_SCALE, LOAD_NO_HINTING
+from matplotlib.ft2font import FT2Font, FIXED_WIDTH, ITALIC, LOAD_NO_SCALE, \
+ LOAD_NO_HINTING, KERNING_UNFITTED
from matplotlib.mathtext import math_parse_s_pdf
-from matplotlib.transforms import Bbox
+from matplotlib.transforms import Bbox, Affine, multiply_affines, Value
from matplotlib import ttconv
# Overview
@@ -377,6 +377,7 @@
self.nextImage = 1
self.markers = {}
+ self.two_byte_charprocs = {}
self.nextMarker = 1
# The PDF spec recommends to include every procset
@@ -409,6 +410,8 @@
xobjects = dict(self.images.values())
for name, value in self.markers.items():
xobjects[name] = value[0]
+ for name, value in self.two_byte_charprocs.items():
+ xobjects[name] = value
self.writeObject(self.XObjectObject, xobjects)
self.writeImages()
self.writeMarkers()
@@ -477,6 +480,11 @@
self.writeObject(fontdictObject, fontdict)
return fontdictObject
+ def _get_xobject_symbol_name(self, filename, symbol_name):
+ return "%s-%s" % (
+ os.path.splitext(os.path.basename(filename))[0],
+ symbol_name)
+
def embedTTF(self, filename, characters):
"""Embed the TTF font from the named file into the document."""
@@ -536,25 +544,32 @@
widths = [ get_char_width(charcode) for charcode in range(firstchar, lastchar+1) ]
descriptor['MaxWidth'] = max(widths)
- # Make the "Differences" array
+ # Make the "Differences" array, sort the ccodes < 255 from
+ # the two-byte ccodes, and build the whole set of glyph ids
+ # that we need from this font.
cmap = font.get_charmap()
glyph_ids = []
differences = []
+ two_byte_chars = Set()
for c in characters:
ccode = ord(c)
gind = cmap.get(ccode) or 0
glyph_ids.append(gind)
- differences.append((ccode, font.get_glyph_name(gind)))
+ glyph_name = font.get_glyph_name(gind)
+ if ccode <= 255:
+ differences.append((ccode, glyph_name))
+ else:
+ two_byte_chars.add(glyph_name)
differences.sort()
- last_c = -256
+ last_c = -2
for c, name in differences:
if c != last_c + 1:
differencesArray.append(c)
differencesArray.append(Name(name))
last_c = c
- # Make the charprocs array (using ttconv for the
+ # Make the charprocs array (using ttconv to generate the
# actual outlines)
rawcharprocs = ttconv.get_pdf_charprocs(filename, glyph_ids)
charprocs = {}
@@ -563,10 +578,19 @@
charprocObject = self.reserveObject('charProc for %s' % name)
self.beginStream(charprocObject.id,
None,
- {'Length': len(stream)})
+ {'Length': len(stream),
+ 'Type': Name('XObject'),
+ 'Subtype': Name('Form'),
+ 'BBox': [cvt(x, nearest=False) for x in font.bbox]})
self.currentstream.write(stream)
self.endStream()
- charprocs[charname] = charprocObject
+ # Send the glyphs with ccode > 255 to the XObject dictionary,
+ # and the others to the font itself
+ if charname in two_byte_chars:
+ name = self._get_xobject_symbol_name(filename, charname)
+ self.two_byte_charprocs[name] = charprocObject
+ else:
+ charprocs[charname] = charprocObject
# Write everything out
self.writeObject(fontdictObject, fontdict)
@@ -955,7 +979,11 @@
self.truetype_font_cache = {}
self.afm_font_cache = {}
self.file.used_characters = self.used_characters = {}
-
+ if rcParams['pdf.fonttype'] == 3:
+ self.encode_string = self.encode_string_type3
+ else:
+ self.encode_string = self.encode_string_type42
+
def finalize(self):
self.gc.finalize()
del self.truetype_font_cache
@@ -1145,30 +1173,61 @@
math_parse_s_pdf(s, 72, prop, 0)
self.merge_used_characters(used_characters)
+ # When using Type 3 fonts, we can't use character codes higher
+ # than 255, so we use the "Do" command to render those
+ # instead.
+ fonttype = rcParams['pdf.fonttype']
+
+ # Set up a global transformation matrix for the whole math expression
+ a = angle / 180.0 * pi
+ self.file.output(Op.gsave)
+ self.file.output(cos(a), sin(a), -sin(a), cos(a), x, y,
+ Op.concat_matrix)
+
self.check_gc(gc, gc._rgb)
self.file.output(Op.begin_text)
prev_font = None, None
oldx, oldy = 0, 0
for record in pswriter:
if record[0] == 'glyph':
- rec_type, ox, oy, fontname, fontsize, num = record
- a = angle / 180.0 * pi
- newx = x + cos(a)*ox - sin(a)*oy
- newy = y + sin(a)*ox + cos(a)*oy
- self._setup_textpos(newx, newy, angle, oldx, oldy)
- oldx, oldy = newx, newy
- if (fontname, fontsize) != prev_font:
- self.file.output(self.file.fontName(fontname), fontsize,
- Op.selectfont)
- prev_font = fontname, fontsize
- self.file.output(self.encode_string(unichr(num)), Op.show)
+ rec_type, ox, oy, fontname, fontsize, num, symbol_name = \
+ record
+ if fonttype == 42 or num <= 255:
+ self._setup_textpos(ox, oy, 0, oldx, oldy)
+ oldx, oldy = ox, oy
+ if (fontname, fontsize) != prev_font:
+ self.file.output(self.file.fontName(fontname), fontsize,
+ Op.selectfont)
+ prev_font = fontname, fontsize
+ self.file.output(self.encode_string(unichr(num)), Op.show)
self.file.output(Op.end_text)
+ # If using Type 3 fonts, render all of the two-byte characters
+ # as XObjects using the 'Do' command.
+ if fonttype == 3:
+ for record in pswriter:
+ if record[0] == 'glyph':
+ rec_type, ox, oy, fontname, fontsize, num, symbol_name = \
+ record
+ if num > 255:
+ self.file.output(Op.gsave,
+ 0.001 * fontsize, 0,
+ 0, 0.001 * fontsize,
+ ox, oy, Op.concat_matrix)
+ name = self.file._get_xobject_symbol_name(
+ fontname, symbol_name)
+ self.file.output(Name(name), Op.use_xobject)
+ self.file.output(Op.grestore)
+
+ # Draw any horizontal lines in the math layout
for record in pswriter:
if record[0] == 'rect':
rec_type, ox, oy, width, height = record
- self.file.output(Op.gsave, x + ox, y + oy, width, height, Op.rectangle, Op.fill, Op.grestore)
+ self.file.output(Op.gsave, ox, oy, width, height, Op.rectangle, Op.fill, Op.grestore)
+ # Pop off the global transformation
+ self.file.output(Op.grestore)
+
def _draw_tex(self, gc, x, y, s, prop, angle):
# Rename to draw_tex to enable, but note the following:
# TODO:
@@ -1221,21 +1280,34 @@
self.draw_polygon(boxgc, gc._rgb,
((x1,y1), (x2,y2), (x3,y3), (x4,y4)))
- def encode_string(self, s):
- if rcParams['pdf.fonttype'] == 42:
- return s.encode('utf-16be', 'replace')
+ def encode_string_type3(self, s):
return s.encode('cp1252', 'replace')
+ def encode_string_type42(self, s):
+ return s.encode('utf-16be', 'replace')
+
def draw_text(self, gc, x, y, s, prop, angle, ismath=False):
# TODO: combine consecutive texts into one BT/ET delimited section
+ # This function is rather complex, since there is no way to
+ # access characters of a Type 3 font with codes > 255. (Type
+ # 3 fonts can not have a CIDMap). Therefore, we break the
+ # string into chunks, where each chunk contains exclusively
+ # 1-byte or exclusively 2-byte characters, and output each
+ # chunk a separate command. 1-byte characters use the regular
+ # text show command (Tj), whereas 2-byte characters use the
+ # use XObject command (Do). If using Type 42 fonts, all of
+ # this complication is avoided, but of course, those fonts can
+ # not be subsetted.
+
if ismath: return self.draw_mathtext(gc, x, y, s, prop, angle)
self.check_gc(gc, gc._rgb)
+ fontsize = prop.get_size_in_points()
+
if rcParams['pdf.use14corefonts']:
font = self._get_font_afm(prop)
l, b, w, h = font.get_str_bbox(s)
- fontsize = prop.get_size_in_points()
y -= b * fontsize / 1000
else:
font = self._get_font_ttf(prop)
@@ -1243,18 +1315,112 @@
font.set_text(s, 0.0, flags=LOAD_NO_HINTING)
y += font.get_descent() / 64.0
- self.file.output(Op.begin_text,
- self.file.fontName(prop),
- prop.get_size_in_points(),
- Op.selectfont)
+ def check_simple_method(s):
+ """Determine if we should use the simple or woven method
+ to output this text, and chunks the string into 1-bit and
+ 2-bit sections if necessary."""
+ use_simple_method = True
+ chunks = []
+ if rcParams['pdf.fonttype'] == 3:
+ if not isinstance(s, str) and len(s) != 0:
+ # Break the string into chunks where each chunk is either
+ # a string of chars <= 255, or a single character > 255.
+ s = unicode(s)
+ for c in s:
+ if ord(c) <= 255:
+ char_type = 1
+ else:
+ char_type = 2
+ if len(chunks) and chunks[-1][0] == char_type:
+ chunks[-1][1].append(c)
+ else:
+ chunks.append((char_type, [c]))
+ use_simple_method = (len(chunks) == 1
+ and chunks[-1][0] == 1)
+ return use_simple_method, chunks
- self._setup_textpos(x, y, angle)
-
- self.file.output(self.encode_string(s), Op.show, Op.end_text)
+ def draw_text_simple():
+ """Outputs text using the simple method."""
+ self.file.output(Op.begin_text,
+ self.file.fontName(prop),
+ prop.get_size_in_points(),
+ Op.selectfont)
+ self._setup_textpos(x, y, angle)
+ self.file.output(self.encode_string(s), Op.show, Op.end_text)
+
+ def draw_text_woven(chunks):
+ """Outputs text using the woven method, alternating
+ between chunks of 1-byte characters and 2-byte characters.
+ Only used for Type 3 fonts."""
+ chunks = [(a, ''.join(b)) for a, b in chunks]
+ cmap = font.get_charmap()
+ # Do the rotation and global translation as a single matrix
+ # concatenation up front
+ self.file.output(Op.gsave)
+ a = angle / 180.0 * pi
+ self.file.output(cos(a), sin(a), -sin(a), cos(a), x, y,
+ Op.concat_matrix)
+
+ # Output all the 1-byte characters in a BT/ET group, then
+ # output all the 2-byte characters.
+ for mode in (1, 2):
+ newx = oldx = 0
+ # Output a 1-byte character chunk
+ if mode == 1:
+ self.file.output(Op.begin_text,
+ self.file.fontName(prop),
+ prop.get_size_in_points(),
+ Op.selectfont)
+
+ for chunk_type, chunk in chunks:
+ if mode == 1 and chunk_type == 1:
+ self._setup_textpos(newx, 0, 0, oldx, 0, 0)
+ self.file.output(self.encode_string(chunk), Op.show)
+ oldx = newx
+
+ lastgind = None
+ for c in chunk:
+ ccode = ord(c)
+ gind = cmap.get(ccode)
+ if gind is not None:
+ if mode == 2 and chunk_type == 2:
+ glyph_name = font.get_glyph_name(gind)
+ self.file.output(Op.gsave)
+ self.file.output(0.001 * fontsize, 0,
+ 0, 0.001 * fontsize,
+ newx, 0, Op.concat_matrix)
+ name = self.file._get_xobject_symbol_name(
+ font.fname, glyph_name)
+ self.file.output(Name(name), Op.use_xobject)
+ self.file.output(Op.grestore)
+
+ # Move the pointer based on the character width
+ # and kerning
+ glyph = font.load_char(ccode, flags=LOAD_NO_HINTING)
+ if lastgind is not None:
+ kern = font.get_kerning(
+ lastgind, gind, KERNING_UNFITTED)
+ else:
+ kern = 0
+ lastgind = gind
+ newx += kern/64.0 + glyph.linearHoriAdvance/65536.0
+
+ if mode == 1:
+ self.file.output(Op.end_text)
+
+ self.file.output(Op.grestore)
+
+ use_simple_method, chunks = check_simple_method(s)
+ if use_simple_method:
+ return draw_text_simple()
+ else:
+ return draw_text_woven(chunks)
+
def get_text_width_height(self, s, prop, ismath):
- if isinstance(s, unicode):
- s = s.encode('cp1252', 'replace')
+ # FT2Font can handle unicode, and so can we
+ # if isinstance(s, unicode):
+ # s = s.encode('cp1252', 'replace')
if ismath:
w, h, pswriter, used_characters = math_parse_s_pdf(s, 72, prop, 0)
Modified: trunk/matplotlib/lib/matplotlib/mathtext.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/mathtext.py 2007-08-09 09:02:13 UTC (rev 3689)
+++ trunk/matplotlib/lib/matplotlib/mathtext.py 2007-08-09 14:23:46 UTC (rev 3690)
@@ -301,8 +301,9 @@
def render_glyph(self, ox, oy, info):
filename = info.font.fname
oy = self.height - oy + info.offset
-
- self.pswriter.append(('glyph', ox, oy, filename, info.fontsize, info.num))
+ self.pswriter.append(
+ ('glyph', ox, oy, filename, info.fontsize,
+ info.num, info.symbol_name))
def render_rect_filled(self, x1, y1, x2, y2):
self.pswriter.append(('rect', x1, self.height - y2, x2 - x1, y2 - y1))
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