FM / matplotlib

/opt/alt/python27/lib64/python2.7/site-packages/matplotlib/

/opt/alt/python27/lib64/python2.7/site-packages/matplotlib

Name	Size	Mode	Actions
backends/	-	0755	rm
delaunay/	-	0755	rm
mpl-data/	-	0755	rm
numerix/	-	0755	rm
projections/	-	0755	rm
sphinxext/	-	0755	rm
afm.py	15089	0644	edit dl rm
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artist.py	35623	0644	edit dl rm
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bezier.py	14917	0644	edit dl rm
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blocking_input.py	13690	0644	edit dl rm
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cbook.py	42756	0644	edit dl rm
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colors.py	39110	0644	edit dl rm
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colors.pyo	40690	0644	edit dl rm
contour.py	42895	0644	edit dl rm
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dates.py	36007	0755	edit dl rm
dates.pyc	41135	0644	edit dl rm
dates.pyo	41071	0644	edit dl rm
dviread.py	32033	0644	edit dl rm
dviread.pyc	35488	0644	edit dl rm
dviread.pyo	35345	0644	edit dl rm
figure.py	41264	0644	edit dl rm
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finance.py	20582	0644	edit dl rm
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fontconfig_pattern.py	6429	0644	edit dl rm
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fontconfig_pattern.pyo	6710	0644	edit dl rm
font_manager.py	42653	0644	edit dl rm
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ft2font.so	306168	0755	edit dl rm
hatch.py	6564	0644	edit dl rm
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image.py	31540	0644	edit dl rm
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legend.py	32302	0644	edit dl rm
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lines.py	54685	0644	edit dl rm
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lines.pyo	57886	0644	edit dl rm
mathtext.py	102009	0644	edit dl rm
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mathtext.pyo	105682	0644	edit dl rm
mlab.py	94294	0644	edit dl rm
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mpl.py	785	0644	edit dl rm
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mpl.pyo	1189	0644	edit dl rm
nxutils.so	9704	0755	edit dl rm
offsetbox.py	29807	0644	edit dl rm
offsetbox.pyc	34825	0644	edit dl rm
offsetbox.pyo	34770	0644	edit dl rm
patches.py	128485	0644	edit dl rm
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path.py	21765	0644	edit dl rm
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pylab.py	10981	0644	edit dl rm
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pyparsing.py	143924	0644	edit dl rm
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pyplot.py	82468	0644	edit dl rm
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rcsetup.py	23434	0644	edit dl rm
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scale.py	14233	0644	edit dl rm
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spines.py	12684	0644	edit dl rm
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table.py	16828	0644	edit dl rm
table.pyc	17373	0644	edit dl rm
table.pyo	17222	0644	edit dl rm
texmanager.py	22464	0644	edit dl rm
texmanager.pyc	20209	0644	edit dl rm
texmanager.pyo	20209	0644	edit dl rm
text.py	59822	0644	edit dl rm
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ticker.py	40428	0644	edit dl rm
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ttconv.so	65488	0755	edit dl rm
type1font.py	11537	0644	edit dl rm
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units.py	4976	0644	edit dl rm
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widgets.py	40833	0644	edit dl rm
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windowing.py	454	0644	edit dl rm
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_cntr.so	20960	0755	edit dl rm
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_image.so	282856	0755	edit dl rm
_mathtext_data.py	57990	0644	edit dl rm
_mathtext_data.pyc	63800	0644	edit dl rm
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_png.so	156504	0755	edit dl rm
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__init__.py	28972	0644	edit dl rm
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__init__.pyo	29381	0644	edit dl rm

Edit: /opt/alt/python27/lib64/python2.7/site-packages/matplotlib/texmanager.py (22464B)

"""
This module supports embedded TeX expressions in matplotlib via dvipng
and dvips for the raster and postscript backends.  The tex and
dvipng/dvips information is cached in ~/.matplotlib/tex.cache for reuse between
sessions

Requirements:

* latex
* \*Agg backends: dvipng
* PS backend: latex w/ psfrag, dvips, and Ghostscript 8.51
  (older versions do not work properly)

Backends:

* \*Agg
* PS
* PDF

For raster output, you can get RGBA numpy arrays from TeX expressions
as follows::

texmanager = TexManager()
  s = '\\TeX\\ is Number $\\displaystyle\\sum_{n=1}^\\infty\\frac{-e^{i\pi}}{2^n}$!'
  Z = self.texmanager.get_rgba(s, size=12, dpi=80, rgb=(1,0,0))

To enable tex rendering of all text in your matplotlib figure, set
text.usetex in your matplotlibrc file (http://matplotlib.sf.net/matplotlibrc)
or include these two lines in your script::

from matplotlib import rc
  rc('text', usetex=True)

"""

import copy, glob, os, shutil, sys, warnings
from subprocess import Popen, PIPE, STDOUT

try:
    from hashlib import md5
except ImportError:
    from md5 import md5 #Deprecated in 2.5

import distutils.version
import numpy as np
import matplotlib as mpl
from matplotlib import rcParams
from matplotlib._png import read_png
import matplotlib.dviread as dviread
import re

DEBUG = False

if sys.platform.startswith('win'): cmd_split = '&'
else: cmd_split = ';'

def dvipng_hack_alpha():
    p = Popen('dvipng -version', shell=True, stdin=PIPE, stdout=PIPE,
        stderr=STDOUT, close_fds=(sys.platform!='win32'))
    stdin, stdout = p.stdin, p.stdout
    for line in stdout:
        if line.startswith('dvipng '):
            version = line.split()[-1]
            mpl.verbose.report('Found dvipng version %s'% version,
                'helpful')
            version = distutils.version.LooseVersion(version)
            return version < distutils.version.LooseVersion('1.6')
    raise RuntimeError('Could not obtain dvipng version')

class TexManager:

"""
    Convert strings to dvi files using TeX, caching the results to a
    working dir
    """

oldpath = mpl.get_home()
    if oldpath is None: oldpath = mpl.get_data_path()
    oldcache = os.path.join(oldpath, '.tex.cache')

configdir = mpl.get_configdir()
    texcache = os.path.join(configdir, 'tex.cache')

if os.path.exists(oldcache):
        print >> sys.stderr, """\
WARNING: found a TeX cache dir in the deprecated location "%s".
  Moving it to the new default location "%s"."""%(oldcache, texcache)
        shutil.move(oldcache, texcache)
    if not os.path.exists(texcache):
        os.mkdir(texcache)

_dvipng_hack_alpha = dvipng_hack_alpha()

# mappable cache of
    rgba_arrayd = {}
    grey_arrayd = {}
    postscriptd = {}
    pscnt = 0

serif = ('cmr', '')
    sans_serif = ('cmss', '')
    monospace = ('cmtt', '')
    cursive = ('pzc', r'\usepackage{chancery}')
    font_family = 'serif'
    font_families = ('serif', 'sans-serif', 'cursive', 'monospace')

font_info = {'new century schoolbook': ('pnc',
                                            r'\renewcommand{\rmdefault}{pnc}'),
                'bookman': ('pbk', r'\renewcommand{\rmdefault}{pbk}'),
                'times': ('ptm', r'\usepackage{mathptmx}'),
                'palatino': ('ppl', r'\usepackage{mathpazo}'),
                'zapf chancery': ('pzc', r'\usepackage{chancery}'),
                'cursive': ('pzc', r'\usepackage{chancery}'),
                'charter': ('pch', r'\usepackage{charter}'),
                'serif': ('cmr', ''),
                'sans-serif': ('cmss', ''),
                'helvetica': ('phv', r'\usepackage{helvet}'),
                'avant garde': ('pag', r'\usepackage{avant}'),
                'courier': ('pcr', r'\usepackage{courier}'),
                'monospace': ('cmtt', ''),
                'computer modern roman': ('cmr', ''),
                'computer modern sans serif': ('cmss', ''),
                'computer modern typewriter': ('cmtt', '')}

_rc_cache = None
    _rc_cache_keys = ('text.latex.preamble', )\
                     + tuple(['font.'+n for n in ('family', ) + font_families])

def __init__(self):

if not os.path.isdir(self.texcache):
            os.mkdir(self.texcache)
        ff = rcParams['font.family'].lower()
        if ff in self.font_families:
            self.font_family = ff
        else:
            mpl.verbose.report('The %s font family is not compatible with LaTeX. serif will be used by default.' % ff, 'helpful')
            self.font_family = 'serif'

fontconfig = [self.font_family]
        for font_family, font_family_attr in \
            [(ff, ff.replace('-', '_')) for ff in self.font_families]:
            for font in rcParams['font.'+font_family]:
                if font.lower() in self.font_info:
                    found_font = self.font_info[font.lower()]
                    setattr(self, font_family_attr,
                            self.font_info[font.lower()])
                    if DEBUG:
                        print 'family: %s, font: %s, info: %s'%(font_family,
                                    font, self.font_info[font.lower()])
                    break
                else:
                    if DEBUG: print '$s font is not compatible with usetex'
            else:
                mpl.verbose.report('No LaTeX-compatible font found for the %s font family in rcParams. Using default.' % ff, 'helpful')
                setattr(self, font_family_attr, self.font_info[font_family])
            fontconfig.append(getattr(self, font_family_attr)[0])
        self._fontconfig = ''.join(fontconfig)

# The following packages and commands need to be included in the latex
        # file's preamble:
        cmd = [self.serif[1], self.sans_serif[1], self.monospace[1]]
        if self.font_family == 'cursive': cmd.append(self.cursive[1])
        while r'\usepackage{type1cm}' in cmd:
            cmd.remove(r'\usepackage{type1cm}')
        cmd = '\n'.join(cmd)
        self._font_preamble = '\n'.join([r'\usepackage{type1cm}', cmd,
                                         r'\usepackage{textcomp}'])

def get_basefile(self, tex, fontsize, dpi=None):
        """
        returns a filename based on a hash of the string, fontsize, and dpi
        """
        s = ''.join([tex, self.get_font_config(), '%f'%fontsize,
                     self.get_custom_preamble(), str(dpi or '')])
        # make sure hash is consistent for all strings, regardless of encoding:
        bytes = unicode(s).encode('utf-8')
        return os.path.join(self.texcache, md5(bytes).hexdigest())

def get_font_config(self):
        """Reinitializes self if relevant rcParams on have changed."""
        if self._rc_cache is None:
            self._rc_cache = dict([(k,None) for k in self._rc_cache_keys])
        changed = [par for par in self._rc_cache_keys if rcParams[par] != \
                   self._rc_cache[par]]
        if changed:
            if DEBUG: print 'DEBUG following keys changed:', changed
            for k in changed:
                if DEBUG:
                    print 'DEBUG %-20s: %-10s -> %-10s' % \
                            (k, self._rc_cache[k], rcParams[k])
                # deepcopy may not be necessary, but feels more future-proof
                self._rc_cache[k] = copy.deepcopy(rcParams[k])
            if DEBUG: print 'DEBUG RE-INIT\nold fontconfig:', self._fontconfig
            self.__init__()
        if DEBUG: print 'DEBUG fontconfig:', self._fontconfig
        return self._fontconfig

def get_font_preamble(self):
        """
        returns a string containing font configuration for the tex preamble
        """
        return self._font_preamble

def get_custom_preamble(self):
        """returns a string containing user additions to the tex preamble"""
        return '\n'.join(rcParams['text.latex.preamble'])

def _get_shell_cmd(self, *args):
        """
        On windows, changing directories can be complicated by the presence of
        multiple drives. get_shell_cmd deals with this issue.
        """
        if sys.platform == 'win32':
            command = ['%s'% os.path.splitdrive(self.texcache)[0]]
        else:
            command = []
        command.extend(args)
        return ' && '.join(command)

def make_tex(self, tex, fontsize):
        """
        Generate a tex file to render the tex string at a specific font size

returns the file name
        """
        basefile = self.get_basefile(tex, fontsize)
        texfile = '%s.tex'%basefile
        fh = file(texfile, 'w')
        custom_preamble = self.get_custom_preamble()
        fontcmd = {'sans-serif' : r'{\sffamily %s}',
                   'monospace'  : r'{\ttfamily %s}'}.get(self.font_family,
                                                         r'{\rmfamily %s}')
        tex = fontcmd % tex

if rcParams['text.latex.unicode']:
            unicode_preamble = """\usepackage{ucs}
\usepackage[utf8x]{inputenc}"""
        else:
            unicode_preamble = ''

s = r"""\documentclass{article}
%s
%s
%s
\usepackage[papersize={72in,72in}, body={70in,70in}, margin={1in,1in}]{geometry}
\pagestyle{empty}
\begin{document}
\fontsize{%f}{%f}%s
\end{document}
""" % (self._font_preamble, unicode_preamble, custom_preamble,
       fontsize, fontsize*1.25, tex)
        if rcParams['text.latex.unicode']:
            fh.write(s.encode('utf8'))
        else:
            try:
                fh.write(s)
            except UnicodeEncodeError, err:
                mpl.verbose.report("You are using unicode and latex, but have "
                            "not enabled the matplotlib 'text.latex.unicode' "
                            "rcParam.", 'helpful')
                raise

fh.close()

return texfile

_re_vbox = re.compile(r"MatplotlibBox:$([\d.]+)pt\+([\d.]+)pt$x([\d.]+)pt")

def make_tex_preview(self, tex, fontsize):
        """
        Generate a tex file to render the tex string at a specific
        font size.  It uses the preview.sty to determin the dimension
        (width, height, descent) of the output.

if rcParams['text.latex.unicode']:
            unicode_preamble = """\usepackage{ucs}
\usepackage[utf8x]{inputenc}"""
        else:
            unicode_preamble = ''

# newbox, setbox, immediate, etc. are used to find the box
        # extent of the rendered text.

s = r"""\documentclass{article}
%s
%s
%s
\usepackage[active,showbox,tightpage]{preview}
%%\usepackage[papersize={72in,72in}, body={70in,70in}, margin={1in,1in}]{geometry}

%% we override the default showbox as it is treated as an error and makes
%% the exit status not zero
\def\showbox#1{\immediate\write16{MatplotlibBox:(\the\ht#1+\the\dp#1)x\the\wd#1}}

\begin{document}
\begin{preview}
{\fontsize{%f}{%f}%s}
\end{preview}
\end{document}
""" % (self._font_preamble, unicode_preamble, custom_preamble,
       fontsize, fontsize*1.25, tex)
        if rcParams['text.latex.unicode']:
            fh.write(s.encode('utf8'))
        else:
            try:
                fh.write(s)
            except UnicodeEncodeError, err:
                mpl.verbose.report("You are using unicode and latex, but have "
                            "not enabled the matplotlib 'text.latex.unicode' "
                            "rcParam.", 'helpful')
                raise

fh.close()

return texfile

def make_dvi(self, tex, fontsize):
        """
        generates a dvi file containing latex's layout of tex string

returns the file name
        """

if rcParams['text.latex.preview']:
            return self.make_dvi_preview(tex, fontsize)

basefile = self.get_basefile(tex, fontsize)
        dvifile = '%s.dvi'% basefile

if DEBUG or not os.path.exists(dvifile):
            texfile = self.make_tex(tex, fontsize)
            outfile = basefile+'.output'
            command = self._get_shell_cmd('cd "%s"'% self.texcache,
                            'latex -interaction=nonstopmode %s > "%s"'\
                            %(os.path.split(texfile)[-1], outfile))
            mpl.verbose.report(command, 'debug')
            exit_status = os.system(command)
            try:
                fh = file(outfile)
                report = fh.read()
                fh.close()
            except IOError:
                report = 'No latex error report available.'
            try:
                os.stat(dvifile)
                exists = True
            except OSError:
                exists = False
            if exit_status or not exists:
                raise RuntimeError(('LaTeX was not able to process the following \
string:\n%s\nHere is the full report generated by LaTeX: \n\n'% repr(tex)) + report)
            else: mpl.verbose.report(report, 'debug')
            for fname in glob.glob(basefile+'*'):
                if fname.endswith('dvi'): pass
                elif fname.endswith('tex'): pass
                else:
                    try: os.remove(fname)
                    except OSError: pass

return dvifile

def make_dvi_preview(self, tex, fontsize):
        """
        generates a dvi file containing latex's layout of tex
        string. It calls make_tex_preview() method and store the size
        information (width, height, descent) in a separte file.

returns the file name
        """
        basefile = self.get_basefile(tex, fontsize)
        dvifile = '%s.dvi'% basefile
        baselinefile = '%s.baseline'% basefile

if DEBUG or not os.path.exists(dvifile) or \
               not os.path.exists(baselinefile):
            texfile = self.make_tex_preview(tex, fontsize)
            outfile = basefile+'.output'
            command = self._get_shell_cmd('cd "%s"'% self.texcache,
                            'latex -interaction=nonstopmode %s > "%s"'\
                            %(os.path.split(texfile)[-1], outfile))
            mpl.verbose.report(command, 'debug')
            exit_status = os.system(command)
            try:
                fh = file(outfile)
                report = fh.read()
                fh.close()

except IOError:
                report = 'No latex error report available.'
            if exit_status:
                raise RuntimeError(('LaTeX was not able to process the following \
string:\n%s\nHere is the full report generated by LaTeX: \n\n'% repr(tex)) + report)
            else: mpl.verbose.report(report, 'debug')

# find the box extent information in the latex output
            # file and store them in ".baseline" file
            m = TexManager._re_vbox.search(report)
            open(basefile+'.baseline',"w").write(" ".join(m.groups()))

for fname in glob.glob(basefile+'*'):
                if fname.endswith('dvi'): pass
                elif fname.endswith('tex'): pass
                elif fname.endswith('baseline'): pass
                else:
                    try: os.remove(fname)
                    except OSError: pass

return dvifile

def make_png(self, tex, fontsize, dpi):
        """
        generates a png file containing latex's rendering of tex string

returns the filename
        """
        basefile = self.get_basefile(tex, fontsize, dpi)
        pngfile = '%s.png'% basefile

# see get_rgba for a discussion of the background
        if DEBUG or not os.path.exists(pngfile):
            dvifile = self.make_dvi(tex, fontsize)
            outfile = basefile+'.output'
            command = self._get_shell_cmd('cd "%s"' % self.texcache,
                        'dvipng -bg Transparent -D %s -T tight -o \
                        "%s" "%s" > "%s"'%(dpi, os.path.split(pngfile)[-1],
                        os.path.split(dvifile)[-1], outfile))
            mpl.verbose.report(command, 'debug')
            exit_status = os.system(command)
            try:
                fh = file(outfile)
                report = fh.read()
                fh.close()
            except IOError:
                report = 'No dvipng error report available.'
            if exit_status:
                raise RuntimeError('dvipng was not able to \
process the flowing file:\n%s\nHere is the full report generated by dvipng: \
\n\n'% dvifile + report)
            else: mpl.verbose.report(report, 'debug')
            try: os.remove(outfile)
            except OSError: pass

return pngfile

def make_ps(self, tex, fontsize):
        """
        generates a postscript file containing latex's rendering of tex string

returns the file name
        """
        basefile = self.get_basefile(tex, fontsize)
        psfile = '%s.epsf'% basefile

if DEBUG or not os.path.exists(psfile):
            dvifile = self.make_dvi(tex, fontsize)
            outfile = basefile+'.output'
            command = self._get_shell_cmd('cd "%s"'% self.texcache,
                        'dvips -q -E -o "%s" "%s" > "%s"'\
                        %(os.path.split(psfile)[-1],
                          os.path.split(dvifile)[-1], outfile))
            mpl.verbose.report(command, 'debug')
            exit_status = os.system(command)
            fh = file(outfile)
            if exit_status:
                raise RuntimeError('dvipng was not able to \
process the flowing file:\n%s\nHere is the full report generated by dvipng: \
\n\n'% dvifile + fh.read())
            else: mpl.verbose.report(fh.read(), 'debug')
            fh.close()
            os.remove(outfile)

return psfile

def get_ps_bbox(self, tex, fontsize):
        """
        returns a list containing the postscript bounding box for latex's
        rendering of the tex string
        """
        psfile = self.make_ps(tex, fontsize)
        ps = file(psfile)
        for line in ps:
            if line.startswith('%%BoundingBox:'):
                return [int(val) for val in line.split()[1:]]
        raise RuntimeError('Could not parse %s'%psfile)

def get_grey(self, tex, fontsize=None, dpi=None):
        """returns the alpha channel"""
        key = tex, self.get_font_config(), fontsize, dpi
        alpha = self.grey_arrayd.get(key)

if alpha is None:
            pngfile = self.make_png(tex, fontsize, dpi)
            X = read_png(os.path.join(self.texcache, pngfile))

if rcParams['text.dvipnghack'] is not None:
                hack = rcParams['text.dvipnghack']
            else:
                hack = self._dvipng_hack_alpha

if hack:
                # hack the alpha channel
                # dvipng assumed a constant background, whereas we want to
                # overlay these rasters with antialiasing over arbitrary
                # backgrounds that may have other figure elements under them.
                # When you set dvipng -bg Transparent, it actually makes the
                # alpha channel 1 and does the background compositing and
                # antialiasing itself and puts the blended data in the rgb
                # channels.  So what we do is extract the alpha information
                # from the red channel, which is a blend of the default dvipng
                # background (white) and foreground (black).  So the amount of
                # red (or green or blue for that matter since white and black
                # blend to a grayscale) is the alpha intensity.  Once we
                # extract the correct alpha information, we assign it to the
                # alpha channel properly and let the users pick their rgb.  In
                # this way, we can overlay tex strings on arbitrary
                # backgrounds with antialiasing
                #
                # red = alpha*red_foreground + (1-alpha)*red_background
                #
                # Since the foreground is black (0) and the background is
                # white (1) this reduces to red = 1-alpha or alpha = 1-red
                #alpha = npy.sqrt(1-X[:,:,0]) # should this be sqrt here?
                alpha = 1-X[:,:,0]
            else:
                alpha = X[:,:,-1]

self.grey_arrayd[key] = alpha
        return alpha

def get_rgba(self, tex, fontsize=None, dpi=None, rgb=(0,0,0)):
        """
        Returns latex's rendering of the tex string as an rgba array
        """
        if not fontsize: fontsize = rcParams['font.size']
        if not dpi: dpi = rcParams['savefig.dpi']
        r,g,b = rgb
        key = tex, self.get_font_config(), fontsize, dpi, tuple(rgb)
        Z = self.rgba_arrayd.get(key)

if Z is None:
            alpha = self.get_grey(tex, fontsize, dpi)

Z = np.zeros((alpha.shape[0], alpha.shape[1], 4), np.float)

Z[:,:,0] = r
            Z[:,:,1] = g
            Z[:,:,2] = b
            Z[:,:,3] = alpha
            self.rgba_arrayd[key] = Z

return Z

def get_text_width_height_descent(self, tex, fontsize, renderer=None):
        """
        return width, heigth and descent of the text.
        """

if renderer:
            dpi_fraction = renderer.points_to_pixels(1.)
        else:
            dpi_fraction = 1.

if rcParams['text.latex.preview']:
            # use preview.sty
            basefile = self.get_basefile(tex, fontsize)
            baselinefile = '%s.baseline'% basefile

if DEBUG or not os.path.exists(baselinefile):
                dvifile = self.make_dvi_preview(tex, fontsize)

l = open(baselinefile).read().split()
            height, depth, width = [float(l1)*dpi_fraction for l1 in l]
            return width, height+depth, depth

else:
            # use dviread. It sometimes returns a wrong descent.
            dvifile = self.make_dvi(tex, fontsize)
            dvi = dviread.Dvi(dvifile, 72*dpi_fraction)
            page = iter(dvi).next()
            dvi.close()
            # A total height (including the descent) needs to be returned.
            return page.width, page.height+page.descent, page.descent

cmd: