1187 lines
42 KiB
Python
1187 lines
42 KiB
Python
import atexit
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import codecs
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import functools
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import logging
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import math
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import os
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import pathlib
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import re
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import shutil
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import subprocess
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import sys
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import tempfile
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import weakref
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import matplotlib as mpl
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from matplotlib import _png, cbook, font_manager as fm, __version__, rcParams
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from matplotlib.backend_bases import (
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_Backend, FigureCanvasBase, FigureManagerBase, GraphicsContextBase,
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RendererBase)
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from matplotlib.backends.backend_mixed import MixedModeRenderer
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from matplotlib.path import Path
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from matplotlib.figure import Figure
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from matplotlib._pylab_helpers import Gcf
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_log = logging.getLogger(__name__)
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# Note: When formatting floating point values, it is important to use the
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# %f/{:f} format rather than %s/{} to avoid triggering scientific notation,
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# which is not recognized by TeX.
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def get_fontspec():
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"""Build fontspec preamble from rc."""
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latex_fontspec = []
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texcommand = rcParams["pgf.texsystem"]
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if texcommand != "pdflatex":
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latex_fontspec.append("\\usepackage{fontspec}")
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if texcommand != "pdflatex" and rcParams["pgf.rcfonts"]:
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families = ["serif", "sans\\-serif", "monospace"]
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commands = ["setmainfont", "setsansfont", "setmonofont"]
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for family, command in zip(families, commands):
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# 1) Forward slashes also work on Windows, so don't mess with
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# backslashes. 2) The dirname needs to include a separator.
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path = pathlib.Path(fm.findfont(family))
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latex_fontspec.append(r"\%s{%s}[Path=%s]" % (
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command, path.name, path.parent.as_posix() + "/"))
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return "\n".join(latex_fontspec)
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def get_preamble():
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"""Get LaTeX preamble from rc."""
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return rcParams["pgf.preamble"]
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###############################################################################
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# This almost made me cry!!!
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# In the end, it's better to use only one unit for all coordinates, since the
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# arithmetic in latex seems to produce inaccurate conversions.
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latex_pt_to_in = 1. / 72.27
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latex_in_to_pt = 1. / latex_pt_to_in
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mpl_pt_to_in = 1. / 72.
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mpl_in_to_pt = 1. / mpl_pt_to_in
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###############################################################################
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# helper functions
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NO_ESCAPE = r"(?<!\\)(?:\\\\)*"
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re_mathsep = re.compile(NO_ESCAPE + r"\$")
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@cbook.deprecated("3.2")
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def repl_escapetext(m):
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return "\\" + m.group(1)
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@cbook.deprecated("3.2")
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def repl_mathdefault(m):
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return m.group(0)[:-len(m.group(1))]
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_replace_escapetext = functools.partial(
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# When the next character is _, ^, $, or % (not preceded by an escape),
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# insert a backslash.
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re.compile(NO_ESCAPE + "(?=[_^$%])").sub, "\\\\")
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_replace_mathdefault = functools.partial(
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# Replace \mathdefault (when not preceded by an escape) by empty string.
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re.compile(NO_ESCAPE + r"(\\mathdefault)").sub, "")
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def common_texification(text):
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"""
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Do some necessary and/or useful substitutions for texts to be included in
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LaTeX documents.
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"""
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# Sometimes, matplotlib adds the unknown command \mathdefault.
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# Not using \mathnormal instead since this looks odd for the latex cm font.
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text = _replace_mathdefault(text)
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# split text into normaltext and inline math parts
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parts = re_mathsep.split(text)
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for i, s in enumerate(parts):
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if not i % 2:
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# textmode replacements
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s = _replace_escapetext(s)
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else:
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# mathmode replacements
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s = r"\(\displaystyle %s\)" % s
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parts[i] = s
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return "".join(parts)
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def writeln(fh, line):
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# every line of a file included with \\input must be terminated with %
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# if not, latex will create additional vertical spaces for some reason
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fh.write(line)
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fh.write("%\n")
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def _font_properties_str(prop):
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# translate font properties to latex commands, return as string
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commands = []
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families = {"serif": r"\rmfamily", "sans": r"\sffamily",
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"sans-serif": r"\sffamily", "monospace": r"\ttfamily"}
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family = prop.get_family()[0]
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if family in families:
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commands.append(families[family])
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elif (any(font.name == family for font in fm.fontManager.ttflist)
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and rcParams["pgf.texsystem"] != "pdflatex"):
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commands.append(r"\setmainfont{%s}\rmfamily" % family)
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else:
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pass # print warning?
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size = prop.get_size_in_points()
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commands.append(r"\fontsize{%f}{%f}" % (size, size * 1.2))
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styles = {"normal": r"", "italic": r"\itshape", "oblique": r"\slshape"}
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commands.append(styles[prop.get_style()])
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boldstyles = ["semibold", "demibold", "demi", "bold", "heavy",
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"extra bold", "black"]
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if prop.get_weight() in boldstyles:
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commands.append(r"\bfseries")
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commands.append(r"\selectfont")
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return "".join(commands)
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def make_pdf_to_png_converter():
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"""Returns a function that converts a pdf file to a png file."""
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if shutil.which("pdftocairo"):
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def cairo_convert(pdffile, pngfile, dpi):
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cmd = ["pdftocairo", "-singlefile", "-png", "-r", "%d" % dpi,
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pdffile, os.path.splitext(pngfile)[0]]
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subprocess.check_output(cmd, stderr=subprocess.STDOUT)
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return cairo_convert
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try:
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gs_info = mpl._get_executable_info("gs")
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except mpl.ExecutableNotFoundError:
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pass
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else:
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def gs_convert(pdffile, pngfile, dpi):
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cmd = [gs_info.executable,
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'-dQUIET', '-dSAFER', '-dBATCH', '-dNOPAUSE', '-dNOPROMPT',
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'-dUseCIEColor', '-dTextAlphaBits=4',
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'-dGraphicsAlphaBits=4', '-dDOINTERPOLATE',
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'-sDEVICE=png16m', '-sOutputFile=%s' % pngfile,
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'-r%d' % dpi, pdffile]
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subprocess.check_output(cmd, stderr=subprocess.STDOUT)
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return gs_convert
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raise RuntimeError("No suitable pdf to png renderer found.")
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class LatexError(Exception):
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def __init__(self, message, latex_output=""):
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super().__init__(message)
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self.latex_output = latex_output
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@cbook.deprecated("3.1")
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class LatexManagerFactory:
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previous_instance = None
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@staticmethod
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def get_latex_manager():
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texcommand = rcParams["pgf.texsystem"]
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latex_header = LatexManager._build_latex_header()
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prev = LatexManagerFactory.previous_instance
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# Check if the previous instance of LatexManager can be reused.
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if (prev and prev.latex_header == latex_header
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and prev.texcommand == texcommand):
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_log.debug("reusing LatexManager")
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return prev
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else:
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_log.debug("creating LatexManager")
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new_inst = LatexManager()
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LatexManagerFactory.previous_instance = new_inst
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return new_inst
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class LatexManager:
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"""
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The LatexManager opens an instance of the LaTeX application for
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determining the metrics of text elements. The LaTeX environment can be
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modified by setting fonts and/or a custom preamble in the rc parameters.
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"""
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_unclean_instances = weakref.WeakSet()
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@staticmethod
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def _build_latex_header():
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latex_preamble = get_preamble()
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latex_fontspec = get_fontspec()
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# Create LaTeX header with some content, else LaTeX will load some math
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# fonts later when we don't expect the additional output on stdout.
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# TODO: is this sufficient?
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latex_header = [
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r"\documentclass{minimal}",
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# Include TeX program name as a comment for cache invalidation.
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# TeX does not allow this to be the first line.
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r"% !TeX program = {}".format(rcParams["pgf.texsystem"]),
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# Test whether \includegraphics supports interpolate option.
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r"\usepackage{graphicx}",
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latex_preamble,
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latex_fontspec,
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r"\begin{document}",
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r"text $math \mu$", # force latex to load fonts now
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r"\typeout{pgf_backend_query_start}",
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]
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return "\n".join(latex_header)
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@classmethod
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def _get_cached_or_new(cls):
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"""
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Return the previous LatexManager if the header and tex system did not
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change, or a new instance otherwise.
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"""
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return cls._get_cached_or_new_impl(cls._build_latex_header())
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@classmethod
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@functools.lru_cache(1)
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def _get_cached_or_new_impl(cls, header): # Helper for _get_cached_or_new.
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return cls()
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@staticmethod
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def _cleanup_remaining_instances():
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unclean_instances = list(LatexManager._unclean_instances)
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for latex_manager in unclean_instances:
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latex_manager._cleanup()
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def _stdin_writeln(self, s):
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if self.latex is None:
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self._setup_latex_process()
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self.latex_stdin_utf8.write(s)
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self.latex_stdin_utf8.write("\n")
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self.latex_stdin_utf8.flush()
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def _expect(self, s):
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exp = s.encode("utf8")
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buf = bytearray()
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while True:
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b = self.latex.stdout.read(1)
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buf += b
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if buf[-len(exp):] == exp:
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break
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if not len(b):
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self.latex.kill()
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self.latex = None
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raise LatexError("LaTeX process halted", buf.decode("utf8"))
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return buf.decode("utf8")
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def _expect_prompt(self):
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return self._expect("\n*")
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def __init__(self):
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# store references for __del__
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self._os_path = os.path
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self._shutil = shutil
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# create a tmp directory for running latex, remember to cleanup
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self.tmpdir = tempfile.mkdtemp(prefix="mpl_pgf_lm_")
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LatexManager._unclean_instances.add(self)
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# test the LaTeX setup to ensure a clean startup of the subprocess
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self.texcommand = rcParams["pgf.texsystem"]
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self.latex_header = LatexManager._build_latex_header()
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latex_end = "\n\\makeatletter\n\\@@end\n"
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try:
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latex = subprocess.Popen([self.texcommand, "-halt-on-error"],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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cwd=self.tmpdir)
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except FileNotFoundError:
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raise RuntimeError(
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"Latex command not found. Install %r or change "
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"pgf.texsystem to the desired command." % self.texcommand)
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except OSError:
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raise RuntimeError("Error starting process %r" % self.texcommand)
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test_input = self.latex_header + latex_end
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stdout, stderr = latex.communicate(test_input.encode("utf-8"))
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if latex.returncode != 0:
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raise LatexError("LaTeX returned an error, probably missing font "
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"or error in preamble:\n%s" % stdout)
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self.latex = None # Will be set up on first use.
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self.str_cache = {} # cache for strings already processed
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def _setup_latex_process(self):
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# open LaTeX process for real work
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latex = subprocess.Popen([self.texcommand, "-halt-on-error"],
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stdin=subprocess.PIPE, stdout=subprocess.PIPE,
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cwd=self.tmpdir)
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self.latex = latex
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self.latex_stdin_utf8 = codecs.getwriter("utf8")(self.latex.stdin)
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# write header with 'pgf_backend_query_start' token
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self._stdin_writeln(self._build_latex_header())
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# read all lines until our 'pgf_backend_query_start' token appears
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self._expect("*pgf_backend_query_start")
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self._expect_prompt()
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def _cleanup(self):
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if not self._os_path.isdir(self.tmpdir):
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return
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try:
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self.latex.communicate()
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self.latex_stdin_utf8.close()
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self.latex.stdout.close()
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except Exception:
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pass
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try:
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self._shutil.rmtree(self.tmpdir)
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LatexManager._unclean_instances.discard(self)
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except Exception:
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sys.stderr.write("error deleting tmp directory %s\n" % self.tmpdir)
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def __del__(self):
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_log.debug("deleting LatexManager")
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self._cleanup()
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def get_width_height_descent(self, text, prop):
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"""
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Get the width, total height and descent for a text typeset by the
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current LaTeX environment.
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"""
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# apply font properties and define textbox
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prop_cmds = _font_properties_str(prop)
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textbox = "\\sbox0{%s %s}" % (prop_cmds, text)
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# check cache
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if textbox in self.str_cache:
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return self.str_cache[textbox]
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# send textbox to LaTeX and wait for prompt
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self._stdin_writeln(textbox)
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try:
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self._expect_prompt()
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except LatexError as e:
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raise ValueError("Error processing '{}'\nLaTeX Output:\n{}"
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.format(text, e.latex_output))
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# typeout width, height and text offset of the last textbox
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self._stdin_writeln(r"\typeout{\the\wd0,\the\ht0,\the\dp0}")
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# read answer from latex and advance to the next prompt
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try:
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answer = self._expect_prompt()
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except LatexError as e:
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raise ValueError("Error processing '{}'\nLaTeX Output:\n{}"
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.format(text, e.latex_output))
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# parse metrics from the answer string
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try:
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width, height, offset = answer.splitlines()[0].split(",")
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except Exception:
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raise ValueError("Error processing '{}'\nLaTeX Output:\n{}"
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.format(text, answer))
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w, h, o = float(width[:-2]), float(height[:-2]), float(offset[:-2])
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# the height returned from LaTeX goes from base to top.
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# the height matplotlib expects goes from bottom to top.
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self.str_cache[textbox] = (w, h + o, o)
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return w, h + o, o
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@functools.lru_cache(1)
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def _get_image_inclusion_command():
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man = LatexManager._get_cached_or_new()
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man._stdin_writeln(
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r"\includegraphics[interpolate=true]{%s}"
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# Don't mess with backslashes on Windows.
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% cbook._get_data_path("images/matplotlib.png").as_posix())
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try:
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prompt = man._expect_prompt()
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return r"\includegraphics"
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except LatexError:
|
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# Discard the broken manager.
|
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LatexManager._get_cached_or_new_impl.cache_clear()
|
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return r"\pgfimage"
|
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|
|
|
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class RendererPgf(RendererBase):
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|
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def __init__(self, figure, fh, dummy=False):
|
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"""
|
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Creates a new PGF renderer that translates any drawing instruction
|
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into text commands to be interpreted in a latex pgfpicture environment.
|
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|
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Attributes
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----------
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figure : `matplotlib.figure.Figure`
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Matplotlib figure to initialize height, width and dpi from.
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fh : file-like
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File handle for the output of the drawing commands.
|
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"""
|
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RendererBase.__init__(self)
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self.dpi = figure.dpi
|
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self.fh = fh
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self.figure = figure
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self.image_counter = 0
|
|
|
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self._latexManager = LatexManager._get_cached_or_new() # deprecated
|
|
|
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if dummy:
|
|
# dummy==True deactivate all methods
|
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for m in RendererPgf.__dict__:
|
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if m.startswith("draw_"):
|
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self.__dict__[m] = lambda *args, **kwargs: None
|
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else:
|
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# if fh does not belong to a filename, deactivate draw_image
|
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if not hasattr(fh, 'name') or not os.path.exists(fh.name):
|
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self.__dict__["draw_image"] = \
|
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lambda *args, **kwargs: cbook._warn_external(
|
|
"streamed pgf-code does not support raster graphics, "
|
|
"consider using the pgf-to-pdf option")
|
|
|
|
@cbook.deprecated("3.2")
|
|
@property
|
|
def latexManager(self):
|
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return self._latexManager
|
|
|
|
def draw_markers(self, gc, marker_path, marker_trans, path, trans,
|
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rgbFace=None):
|
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# docstring inherited
|
|
|
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writeln(self.fh, r"\begin{pgfscope}")
|
|
|
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# convert from display units to in
|
|
f = 1. / self.dpi
|
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|
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# set style and clip
|
|
self._print_pgf_clip(gc)
|
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self._print_pgf_path_styles(gc, rgbFace)
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|
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# build marker definition
|
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bl, tr = marker_path.get_extents(marker_trans).get_points()
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coords = bl[0] * f, bl[1] * f, tr[0] * f, tr[1] * f
|
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writeln(self.fh,
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r"\pgfsys@defobject{currentmarker}"
|
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r"{\pgfqpoint{%fin}{%fin}}{\pgfqpoint{%fin}{%fin}}{" % coords)
|
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self._print_pgf_path(None, marker_path, marker_trans)
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self._pgf_path_draw(stroke=gc.get_linewidth() != 0.0,
|
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fill=rgbFace is not None)
|
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writeln(self.fh, r"}")
|
|
|
|
# draw marker for each vertex
|
|
for point, code in path.iter_segments(trans, simplify=False):
|
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x, y = point[0] * f, point[1] * f
|
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writeln(self.fh, r"\begin{pgfscope}")
|
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writeln(self.fh, r"\pgfsys@transformshift{%fin}{%fin}" % (x, y))
|
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writeln(self.fh, r"\pgfsys@useobject{currentmarker}{}")
|
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writeln(self.fh, r"\end{pgfscope}")
|
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|
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writeln(self.fh, r"\end{pgfscope}")
|
|
|
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def draw_path(self, gc, path, transform, rgbFace=None):
|
|
# docstring inherited
|
|
writeln(self.fh, r"\begin{pgfscope}")
|
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# draw the path
|
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self._print_pgf_clip(gc)
|
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self._print_pgf_path_styles(gc, rgbFace)
|
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self._print_pgf_path(gc, path, transform, rgbFace)
|
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self._pgf_path_draw(stroke=gc.get_linewidth() != 0.0,
|
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fill=rgbFace is not None)
|
|
writeln(self.fh, r"\end{pgfscope}")
|
|
|
|
# if present, draw pattern on top
|
|
if gc.get_hatch():
|
|
writeln(self.fh, r"\begin{pgfscope}")
|
|
self._print_pgf_path_styles(gc, rgbFace)
|
|
|
|
# combine clip and path for clipping
|
|
self._print_pgf_clip(gc)
|
|
self._print_pgf_path(gc, path, transform, rgbFace)
|
|
writeln(self.fh, r"\pgfusepath{clip}")
|
|
|
|
# build pattern definition
|
|
writeln(self.fh,
|
|
r"\pgfsys@defobject{currentpattern}"
|
|
r"{\pgfqpoint{0in}{0in}}{\pgfqpoint{1in}{1in}}{")
|
|
writeln(self.fh, r"\begin{pgfscope}")
|
|
writeln(self.fh,
|
|
r"\pgfpathrectangle"
|
|
r"{\pgfqpoint{0in}{0in}}{\pgfqpoint{1in}{1in}}")
|
|
writeln(self.fh, r"\pgfusepath{clip}")
|
|
scale = mpl.transforms.Affine2D().scale(self.dpi)
|
|
self._print_pgf_path(None, gc.get_hatch_path(), scale)
|
|
self._pgf_path_draw(stroke=True)
|
|
writeln(self.fh, r"\end{pgfscope}")
|
|
writeln(self.fh, r"}")
|
|
# repeat pattern, filling the bounding rect of the path
|
|
f = 1. / self.dpi
|
|
(xmin, ymin), (xmax, ymax) = \
|
|
path.get_extents(transform).get_points()
|
|
xmin, xmax = f * xmin, f * xmax
|
|
ymin, ymax = f * ymin, f * ymax
|
|
repx, repy = math.ceil(xmax - xmin), math.ceil(ymax - ymin)
|
|
writeln(self.fh,
|
|
r"\pgfsys@transformshift{%fin}{%fin}" % (xmin, ymin))
|
|
for iy in range(repy):
|
|
for ix in range(repx):
|
|
writeln(self.fh, r"\pgfsys@useobject{currentpattern}{}")
|
|
writeln(self.fh, r"\pgfsys@transformshift{1in}{0in}")
|
|
writeln(self.fh, r"\pgfsys@transformshift{-%din}{0in}" % repx)
|
|
writeln(self.fh, r"\pgfsys@transformshift{0in}{1in}")
|
|
|
|
writeln(self.fh, r"\end{pgfscope}")
|
|
|
|
def _print_pgf_clip(self, gc):
|
|
f = 1. / self.dpi
|
|
# check for clip box
|
|
bbox = gc.get_clip_rectangle()
|
|
if bbox:
|
|
p1, p2 = bbox.get_points()
|
|
w, h = p2 - p1
|
|
coords = p1[0] * f, p1[1] * f, w * f, h * f
|
|
writeln(self.fh,
|
|
r"\pgfpathrectangle"
|
|
r"{\pgfqpoint{%fin}{%fin}}{\pgfqpoint{%fin}{%fin}}"
|
|
% coords)
|
|
writeln(self.fh, r"\pgfusepath{clip}")
|
|
|
|
# check for clip path
|
|
clippath, clippath_trans = gc.get_clip_path()
|
|
if clippath is not None:
|
|
self._print_pgf_path(gc, clippath, clippath_trans)
|
|
writeln(self.fh, r"\pgfusepath{clip}")
|
|
|
|
def _print_pgf_path_styles(self, gc, rgbFace):
|
|
# cap style
|
|
capstyles = {"butt": r"\pgfsetbuttcap",
|
|
"round": r"\pgfsetroundcap",
|
|
"projecting": r"\pgfsetrectcap"}
|
|
writeln(self.fh, capstyles[gc.get_capstyle()])
|
|
|
|
# join style
|
|
joinstyles = {"miter": r"\pgfsetmiterjoin",
|
|
"round": r"\pgfsetroundjoin",
|
|
"bevel": r"\pgfsetbeveljoin"}
|
|
writeln(self.fh, joinstyles[gc.get_joinstyle()])
|
|
|
|
# filling
|
|
has_fill = rgbFace is not None
|
|
|
|
if gc.get_forced_alpha():
|
|
fillopacity = strokeopacity = gc.get_alpha()
|
|
else:
|
|
strokeopacity = gc.get_rgb()[3]
|
|
fillopacity = rgbFace[3] if has_fill and len(rgbFace) > 3 else 1.0
|
|
|
|
if has_fill:
|
|
writeln(self.fh,
|
|
r"\definecolor{currentfill}{rgb}{%f,%f,%f}"
|
|
% tuple(rgbFace[:3]))
|
|
writeln(self.fh, r"\pgfsetfillcolor{currentfill}")
|
|
if has_fill and fillopacity != 1.0:
|
|
writeln(self.fh, r"\pgfsetfillopacity{%f}" % fillopacity)
|
|
|
|
# linewidth and color
|
|
lw = gc.get_linewidth() * mpl_pt_to_in * latex_in_to_pt
|
|
stroke_rgba = gc.get_rgb()
|
|
writeln(self.fh, r"\pgfsetlinewidth{%fpt}" % lw)
|
|
writeln(self.fh,
|
|
r"\definecolor{currentstroke}{rgb}{%f,%f,%f}"
|
|
% stroke_rgba[:3])
|
|
writeln(self.fh, r"\pgfsetstrokecolor{currentstroke}")
|
|
if strokeopacity != 1.0:
|
|
writeln(self.fh, r"\pgfsetstrokeopacity{%f}" % strokeopacity)
|
|
|
|
# line style
|
|
dash_offset, dash_list = gc.get_dashes()
|
|
if dash_list is None:
|
|
writeln(self.fh, r"\pgfsetdash{}{0pt}")
|
|
else:
|
|
writeln(self.fh,
|
|
r"\pgfsetdash{%s}{%fpt}"
|
|
% ("".join(r"{%fpt}" % dash for dash in dash_list),
|
|
dash_offset))
|
|
|
|
def _print_pgf_path(self, gc, path, transform, rgbFace=None):
|
|
f = 1. / self.dpi
|
|
# check for clip box / ignore clip for filled paths
|
|
bbox = gc.get_clip_rectangle() if gc else None
|
|
if bbox and (rgbFace is None):
|
|
p1, p2 = bbox.get_points()
|
|
clip = (p1[0], p1[1], p2[0], p2[1])
|
|
else:
|
|
clip = None
|
|
# build path
|
|
for points, code in path.iter_segments(transform, clip=clip):
|
|
if code == Path.MOVETO:
|
|
x, y = tuple(points)
|
|
writeln(self.fh,
|
|
r"\pgfpathmoveto{\pgfqpoint{%fin}{%fin}}" %
|
|
(f * x, f * y))
|
|
elif code == Path.CLOSEPOLY:
|
|
writeln(self.fh, r"\pgfpathclose")
|
|
elif code == Path.LINETO:
|
|
x, y = tuple(points)
|
|
writeln(self.fh,
|
|
r"\pgfpathlineto{\pgfqpoint{%fin}{%fin}}" %
|
|
(f * x, f * y))
|
|
elif code == Path.CURVE3:
|
|
cx, cy, px, py = tuple(points)
|
|
coords = cx * f, cy * f, px * f, py * f
|
|
writeln(self.fh,
|
|
r"\pgfpathquadraticcurveto"
|
|
r"{\pgfqpoint{%fin}{%fin}}{\pgfqpoint{%fin}{%fin}}"
|
|
% coords)
|
|
elif code == Path.CURVE4:
|
|
c1x, c1y, c2x, c2y, px, py = tuple(points)
|
|
coords = c1x * f, c1y * f, c2x * f, c2y * f, px * f, py * f
|
|
writeln(self.fh,
|
|
r"\pgfpathcurveto"
|
|
r"{\pgfqpoint{%fin}{%fin}}"
|
|
r"{\pgfqpoint{%fin}{%fin}}"
|
|
r"{\pgfqpoint{%fin}{%fin}}"
|
|
% coords)
|
|
|
|
def _pgf_path_draw(self, stroke=True, fill=False):
|
|
actions = []
|
|
if stroke:
|
|
actions.append("stroke")
|
|
if fill:
|
|
actions.append("fill")
|
|
writeln(self.fh, r"\pgfusepath{%s}" % ",".join(actions))
|
|
|
|
def option_scale_image(self):
|
|
# docstring inherited
|
|
return True
|
|
|
|
def option_image_nocomposite(self):
|
|
# docstring inherited
|
|
return not rcParams['image.composite_image']
|
|
|
|
def draw_image(self, gc, x, y, im, transform=None):
|
|
# docstring inherited
|
|
|
|
h, w = im.shape[:2]
|
|
if w == 0 or h == 0:
|
|
return
|
|
|
|
# save the images to png files
|
|
path = os.path.dirname(self.fh.name)
|
|
fname = os.path.splitext(os.path.basename(self.fh.name))[0]
|
|
fname_img = "%s-img%d.png" % (fname, self.image_counter)
|
|
self.image_counter += 1
|
|
with pathlib.Path(path, fname_img).open("wb") as file:
|
|
_png.write_png(im[::-1], file)
|
|
|
|
# reference the image in the pgf picture
|
|
writeln(self.fh, r"\begin{pgfscope}")
|
|
self._print_pgf_clip(gc)
|
|
f = 1. / self.dpi # from display coords to inch
|
|
if transform is None:
|
|
writeln(self.fh,
|
|
r"\pgfsys@transformshift{%fin}{%fin}" % (x * f, y * f))
|
|
w, h = w * f, h * f
|
|
else:
|
|
tr1, tr2, tr3, tr4, tr5, tr6 = transform.frozen().to_values()
|
|
writeln(self.fh,
|
|
r"\pgfsys@transformcm{%f}{%f}{%f}{%f}{%fin}{%fin}" %
|
|
(tr1 * f, tr2 * f, tr3 * f, tr4 * f,
|
|
(tr5 + x) * f, (tr6 + y) * f))
|
|
w = h = 1 # scale is already included in the transform
|
|
interp = str(transform is None).lower() # interpolation in PDF reader
|
|
writeln(self.fh,
|
|
r"\pgftext[left,bottom]"
|
|
r"{%s[interpolate=%s,width=%fin,height=%fin]{%s}}" %
|
|
(_get_image_inclusion_command(),
|
|
interp, w, h, fname_img))
|
|
writeln(self.fh, r"\end{pgfscope}")
|
|
|
|
def draw_tex(self, gc, x, y, s, prop, angle, ismath="TeX!", mtext=None):
|
|
# docstring inherited
|
|
self.draw_text(gc, x, y, s, prop, angle, ismath, mtext)
|
|
|
|
def draw_text(self, gc, x, y, s, prop, angle, ismath=False, mtext=None):
|
|
# docstring inherited
|
|
|
|
# prepare string for tex
|
|
s = common_texification(s)
|
|
prop_cmds = _font_properties_str(prop)
|
|
s = r"%s %s" % (prop_cmds, s)
|
|
|
|
writeln(self.fh, r"\begin{pgfscope}")
|
|
|
|
alpha = gc.get_alpha()
|
|
if alpha != 1.0:
|
|
writeln(self.fh, r"\pgfsetfillopacity{%f}" % alpha)
|
|
writeln(self.fh, r"\pgfsetstrokeopacity{%f}" % alpha)
|
|
rgb = tuple(gc.get_rgb())[:3]
|
|
writeln(self.fh, r"\definecolor{textcolor}{rgb}{%f,%f,%f}" % rgb)
|
|
writeln(self.fh, r"\pgfsetstrokecolor{textcolor}")
|
|
writeln(self.fh, r"\pgfsetfillcolor{textcolor}")
|
|
s = r"\color{textcolor}" + s
|
|
|
|
dpi = self.figure.dpi
|
|
text_args = []
|
|
if mtext and (
|
|
(angle == 0 or
|
|
mtext.get_rotation_mode() == "anchor") and
|
|
mtext.get_verticalalignment() != "center_baseline"):
|
|
# if text anchoring can be supported, get the original coordinates
|
|
# and add alignment information
|
|
pos = mtext.get_unitless_position()
|
|
x, y = mtext.get_transform().transform(pos)
|
|
halign = {"left": "left", "right": "right", "center": ""}
|
|
valign = {"top": "top", "bottom": "bottom",
|
|
"baseline": "base", "center": ""}
|
|
text_args.extend([
|
|
f"x={x/dpi:f}in",
|
|
f"y={y/dpi:f}in",
|
|
halign[mtext.get_horizontalalignment()],
|
|
valign[mtext.get_verticalalignment()],
|
|
])
|
|
else:
|
|
# if not, use the text layout provided by Matplotlib.
|
|
text_args.append(f"x={x/dpi:f}in, y={y/dpi:f}in, left, base")
|
|
|
|
if angle != 0:
|
|
text_args.append("rotate=%f" % angle)
|
|
|
|
writeln(self.fh, r"\pgftext[%s]{%s}" % (",".join(text_args), s))
|
|
writeln(self.fh, r"\end{pgfscope}")
|
|
|
|
def get_text_width_height_descent(self, s, prop, ismath):
|
|
# docstring inherited
|
|
|
|
# check if the math is supposed to be displaystyled
|
|
s = common_texification(s)
|
|
|
|
# get text metrics in units of latex pt, convert to display units
|
|
w, h, d = (LatexManager._get_cached_or_new()
|
|
.get_width_height_descent(s, prop))
|
|
# TODO: this should be latex_pt_to_in instead of mpl_pt_to_in
|
|
# but having a little bit more space around the text looks better,
|
|
# plus the bounding box reported by LaTeX is VERY narrow
|
|
f = mpl_pt_to_in * self.dpi
|
|
return w * f, h * f, d * f
|
|
|
|
def flipy(self):
|
|
# docstring inherited
|
|
return False
|
|
|
|
def get_canvas_width_height(self):
|
|
# docstring inherited
|
|
return (self.figure.get_figwidth() * self.dpi,
|
|
self.figure.get_figheight() * self.dpi)
|
|
|
|
def points_to_pixels(self, points):
|
|
# docstring inherited
|
|
return points * mpl_pt_to_in * self.dpi
|
|
|
|
def new_gc(self):
|
|
# docstring inherited
|
|
return GraphicsContextPgf()
|
|
|
|
|
|
class GraphicsContextPgf(GraphicsContextBase):
|
|
pass
|
|
|
|
########################################################################
|
|
|
|
|
|
class TmpDirCleaner:
|
|
remaining_tmpdirs = set()
|
|
|
|
@staticmethod
|
|
def add(tmpdir):
|
|
TmpDirCleaner.remaining_tmpdirs.add(tmpdir)
|
|
|
|
@staticmethod
|
|
def cleanup_remaining_tmpdirs():
|
|
for tmpdir in TmpDirCleaner.remaining_tmpdirs:
|
|
error_message = "error deleting tmp directory {}".format(tmpdir)
|
|
shutil.rmtree(
|
|
tmpdir,
|
|
onerror=lambda *args: _log.error(error_message))
|
|
|
|
|
|
class FigureCanvasPgf(FigureCanvasBase):
|
|
filetypes = {"pgf": "LaTeX PGF picture",
|
|
"pdf": "LaTeX compiled PGF picture",
|
|
"png": "Portable Network Graphics", }
|
|
|
|
def get_default_filetype(self):
|
|
return 'pdf'
|
|
|
|
@cbook._delete_parameter("3.2", "dryrun")
|
|
def _print_pgf_to_fh(self, fh, *args,
|
|
dryrun=False, bbox_inches_restore=None, **kwargs):
|
|
if dryrun:
|
|
renderer = RendererPgf(self.figure, None, dummy=True)
|
|
self.figure.draw(renderer)
|
|
return
|
|
|
|
header_text = """%% Creator: Matplotlib, PGF backend
|
|
%%
|
|
%% To include the figure in your LaTeX document, write
|
|
%% \\input{<filename>.pgf}
|
|
%%
|
|
%% Make sure the required packages are loaded in your preamble
|
|
%% \\usepackage{pgf}
|
|
%%
|
|
%% and, on pdftex
|
|
%% \\usepackage[utf8]{inputenc}\\DeclareUnicodeCharacter{2212}{-}
|
|
%%
|
|
%% or, on luatex and xetex
|
|
%% \\usepackage{unicode-math}
|
|
%%
|
|
%% Figures using additional raster images can only be included by \\input if
|
|
%% they are in the same directory as the main LaTeX file. For loading figures
|
|
%% from other directories you can use the `import` package
|
|
%% \\usepackage{import}
|
|
%%
|
|
%% and then include the figures with
|
|
%% \\import{<path to file>}{<filename>.pgf}
|
|
%%
|
|
"""
|
|
|
|
# append the preamble used by the backend as a comment for debugging
|
|
header_info_preamble = ["%% Matplotlib used the following preamble"]
|
|
for line in get_preamble().splitlines():
|
|
header_info_preamble.append("%% " + line)
|
|
for line in get_fontspec().splitlines():
|
|
header_info_preamble.append("%% " + line)
|
|
header_info_preamble.append("%%")
|
|
header_info_preamble = "\n".join(header_info_preamble)
|
|
|
|
# get figure size in inch
|
|
w, h = self.figure.get_figwidth(), self.figure.get_figheight()
|
|
dpi = self.figure.get_dpi()
|
|
|
|
# create pgfpicture environment and write the pgf code
|
|
fh.write(header_text)
|
|
fh.write(header_info_preamble)
|
|
fh.write("\n")
|
|
writeln(fh, r"\begingroup")
|
|
writeln(fh, r"\makeatletter")
|
|
writeln(fh, r"\begin{pgfpicture}")
|
|
writeln(fh,
|
|
r"\pgfpathrectangle{\pgfpointorigin}{\pgfqpoint{%fin}{%fin}}"
|
|
% (w, h))
|
|
writeln(fh, r"\pgfusepath{use as bounding box, clip}")
|
|
renderer = MixedModeRenderer(self.figure, w, h, dpi,
|
|
RendererPgf(self.figure, fh),
|
|
bbox_inches_restore=bbox_inches_restore)
|
|
self.figure.draw(renderer)
|
|
|
|
# end the pgfpicture environment
|
|
writeln(fh, r"\end{pgfpicture}")
|
|
writeln(fh, r"\makeatother")
|
|
writeln(fh, r"\endgroup")
|
|
|
|
def print_pgf(self, fname_or_fh, *args, **kwargs):
|
|
"""
|
|
Output pgf commands for drawing the figure so it can be included and
|
|
rendered in latex documents.
|
|
"""
|
|
if kwargs.get("dryrun", False):
|
|
self._print_pgf_to_fh(None, *args, **kwargs)
|
|
return
|
|
with cbook.open_file_cm(fname_or_fh, "w", encoding="utf-8") as file:
|
|
if not cbook.file_requires_unicode(file):
|
|
file = codecs.getwriter("utf-8")(file)
|
|
self._print_pgf_to_fh(file, *args, **kwargs)
|
|
|
|
def _print_pdf_to_fh(self, fh, *args, **kwargs):
|
|
w, h = self.figure.get_figwidth(), self.figure.get_figheight()
|
|
|
|
try:
|
|
# create temporary directory for compiling the figure
|
|
tmpdir = tempfile.mkdtemp(prefix="mpl_pgf_")
|
|
fname_pgf = os.path.join(tmpdir, "figure.pgf")
|
|
fname_tex = os.path.join(tmpdir, "figure.tex")
|
|
fname_pdf = os.path.join(tmpdir, "figure.pdf")
|
|
|
|
# print figure to pgf and compile it with latex
|
|
self.print_pgf(fname_pgf, *args, **kwargs)
|
|
|
|
latex_preamble = get_preamble()
|
|
latex_fontspec = get_fontspec()
|
|
latexcode = """
|
|
\\documentclass[12pt]{minimal}
|
|
\\usepackage[paperwidth=%fin, paperheight=%fin, margin=0in]{geometry}
|
|
%s
|
|
%s
|
|
\\usepackage{pgf}
|
|
|
|
\\begin{document}
|
|
\\centering
|
|
\\input{figure.pgf}
|
|
\\end{document}""" % (w, h, latex_preamble, latex_fontspec)
|
|
pathlib.Path(fname_tex).write_text(latexcode, encoding="utf-8")
|
|
|
|
texcommand = rcParams["pgf.texsystem"]
|
|
cbook._check_and_log_subprocess(
|
|
[texcommand, "-interaction=nonstopmode", "-halt-on-error",
|
|
"figure.tex"], _log, cwd=tmpdir)
|
|
|
|
# copy file contents to target
|
|
with open(fname_pdf, "rb") as fh_src:
|
|
shutil.copyfileobj(fh_src, fh)
|
|
finally:
|
|
try:
|
|
shutil.rmtree(tmpdir)
|
|
except:
|
|
TmpDirCleaner.add(tmpdir)
|
|
|
|
def print_pdf(self, fname_or_fh, *args, **kwargs):
|
|
"""Use LaTeX to compile a Pgf generated figure to PDF."""
|
|
if kwargs.get("dryrun", False):
|
|
self._print_pgf_to_fh(None, *args, **kwargs)
|
|
return
|
|
with cbook.open_file_cm(fname_or_fh, "wb") as file:
|
|
self._print_pdf_to_fh(file, *args, **kwargs)
|
|
|
|
def _print_png_to_fh(self, fh, *args, **kwargs):
|
|
converter = make_pdf_to_png_converter()
|
|
|
|
try:
|
|
# create temporary directory for pdf creation and png conversion
|
|
tmpdir = tempfile.mkdtemp(prefix="mpl_pgf_")
|
|
fname_pdf = os.path.join(tmpdir, "figure.pdf")
|
|
fname_png = os.path.join(tmpdir, "figure.png")
|
|
# create pdf and try to convert it to png
|
|
self.print_pdf(fname_pdf, *args, **kwargs)
|
|
converter(fname_pdf, fname_png, dpi=self.figure.dpi)
|
|
# copy file contents to target
|
|
with open(fname_png, "rb") as fh_src:
|
|
shutil.copyfileobj(fh_src, fh)
|
|
finally:
|
|
try:
|
|
shutil.rmtree(tmpdir)
|
|
except:
|
|
TmpDirCleaner.add(tmpdir)
|
|
|
|
def print_png(self, fname_or_fh, *args, **kwargs):
|
|
"""Use LaTeX to compile a pgf figure to pdf and convert it to png."""
|
|
if kwargs.get("dryrun", False):
|
|
self._print_pgf_to_fh(None, *args, **kwargs)
|
|
return
|
|
with cbook.open_file_cm(fname_or_fh, "wb") as file:
|
|
self._print_png_to_fh(file, *args, **kwargs)
|
|
|
|
def get_renderer(self):
|
|
return RendererPgf(self.figure, None, dummy=True)
|
|
|
|
|
|
class FigureManagerPgf(FigureManagerBase):
|
|
pass
|
|
|
|
|
|
@_Backend.export
|
|
class _BackendPgf(_Backend):
|
|
FigureCanvas = FigureCanvasPgf
|
|
FigureManager = FigureManagerPgf
|
|
|
|
|
|
def _cleanup_all():
|
|
LatexManager._cleanup_remaining_instances()
|
|
TmpDirCleaner.cleanup_remaining_tmpdirs()
|
|
|
|
|
|
atexit.register(_cleanup_all)
|
|
|
|
|
|
class PdfPages:
|
|
"""
|
|
A multi-page PDF file using the pgf backend
|
|
|
|
Examples
|
|
--------
|
|
>>> import matplotlib.pyplot as plt
|
|
>>> # Initialize:
|
|
>>> with PdfPages('foo.pdf') as pdf:
|
|
... # As many times as you like, create a figure fig and save it:
|
|
... fig = plt.figure()
|
|
... pdf.savefig(fig)
|
|
... # When no figure is specified the current figure is saved
|
|
... pdf.savefig()
|
|
"""
|
|
__slots__ = (
|
|
'_outputfile',
|
|
'keep_empty',
|
|
'_tmpdir',
|
|
'_basename',
|
|
'_fname_tex',
|
|
'_fname_pdf',
|
|
'_n_figures',
|
|
'_file',
|
|
'metadata',
|
|
)
|
|
|
|
def __init__(self, filename, *, keep_empty=True, metadata=None):
|
|
"""
|
|
Create a new PdfPages object.
|
|
|
|
Parameters
|
|
----------
|
|
filename : str or path-like
|
|
Plots using `PdfPages.savefig` will be written to a file at this
|
|
location. Any older file with the same name is overwritten.
|
|
keep_empty : bool, optional
|
|
If set to False, then empty pdf files will be deleted automatically
|
|
when closed.
|
|
metadata : dictionary, optional
|
|
Information dictionary object (see PDF reference section 10.2.1
|
|
'Document Information Dictionary'), e.g.:
|
|
`{'Creator': 'My software', 'Author': 'Me',
|
|
'Title': 'Awesome fig'}`
|
|
|
|
The standard keys are `'Title'`, `'Author'`, `'Subject'`,
|
|
`'Keywords'`, `'Producer'`, `'Creator'` and `'Trapped'`.
|
|
Values have been predefined for `'Creator'` and `'Producer'`.
|
|
They can be removed by setting them to the empty string.
|
|
"""
|
|
self._outputfile = filename
|
|
self._n_figures = 0
|
|
self.keep_empty = keep_empty
|
|
self.metadata = metadata or {}
|
|
|
|
# create temporary directory for compiling the figure
|
|
self._tmpdir = tempfile.mkdtemp(prefix="mpl_pgf_pdfpages_")
|
|
self._basename = 'pdf_pages'
|
|
self._fname_tex = os.path.join(self._tmpdir, self._basename + ".tex")
|
|
self._fname_pdf = os.path.join(self._tmpdir, self._basename + ".pdf")
|
|
self._file = open(self._fname_tex, 'wb')
|
|
|
|
def _write_header(self, width_inches, height_inches):
|
|
supported_keys = {
|
|
'title', 'author', 'subject', 'keywords', 'creator',
|
|
'producer', 'trapped'
|
|
}
|
|
infoDict = {
|
|
'creator': 'matplotlib %s, https://matplotlib.org' % __version__,
|
|
'producer': 'matplotlib pgf backend %s' % __version__,
|
|
}
|
|
metadata = {k.lower(): v for k, v in self.metadata.items()}
|
|
infoDict.update(metadata)
|
|
hyperref_options = ''
|
|
for k, v in infoDict.items():
|
|
if k not in supported_keys:
|
|
raise ValueError(
|
|
'Not a supported pdf metadata field: "{}"'.format(k)
|
|
)
|
|
hyperref_options += 'pdf' + k + '={' + str(v) + '},'
|
|
|
|
latex_preamble = get_preamble()
|
|
latex_fontspec = get_fontspec()
|
|
latex_header = r"""\PassOptionsToPackage{{
|
|
{metadata}
|
|
}}{{hyperref}}
|
|
\RequirePackage{{hyperref}}
|
|
\documentclass[12pt]{{minimal}}
|
|
\usepackage[
|
|
paperwidth={width}in,
|
|
paperheight={height}in,
|
|
margin=0in
|
|
]{{geometry}}
|
|
{preamble}
|
|
{fontspec}
|
|
\usepackage{{pgf}}
|
|
\setlength{{\parindent}}{{0pt}}
|
|
|
|
\begin{{document}}%%
|
|
""".format(
|
|
width=width_inches,
|
|
height=height_inches,
|
|
preamble=latex_preamble,
|
|
fontspec=latex_fontspec,
|
|
metadata=hyperref_options,
|
|
)
|
|
self._file.write(latex_header.encode('utf-8'))
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, exc_type, exc_val, exc_tb):
|
|
self.close()
|
|
|
|
def close(self):
|
|
"""
|
|
Finalize this object, running LaTeX in a temporary directory
|
|
and moving the final pdf file to *filename*.
|
|
"""
|
|
self._file.write(rb'\end{document}\n')
|
|
self._file.close()
|
|
|
|
if self._n_figures > 0:
|
|
try:
|
|
self._run_latex()
|
|
finally:
|
|
try:
|
|
shutil.rmtree(self._tmpdir)
|
|
except:
|
|
TmpDirCleaner.add(self._tmpdir)
|
|
elif self.keep_empty:
|
|
open(self._outputfile, 'wb').close()
|
|
|
|
def _run_latex(self):
|
|
texcommand = rcParams["pgf.texsystem"]
|
|
cbook._check_and_log_subprocess(
|
|
[texcommand, "-interaction=nonstopmode", "-halt-on-error",
|
|
os.path.basename(self._fname_tex)],
|
|
_log, cwd=self._tmpdir)
|
|
# copy file contents to target
|
|
shutil.copyfile(self._fname_pdf, self._outputfile)
|
|
|
|
def savefig(self, figure=None, **kwargs):
|
|
"""
|
|
Saves a `.Figure` to this file as a new page.
|
|
|
|
Any other keyword arguments are passed to `~.Figure.savefig`.
|
|
|
|
Parameters
|
|
----------
|
|
figure : `.Figure` or int, optional
|
|
Specifies what figure is saved to file. If not specified, the
|
|
active figure is saved. If a `.Figure` instance is provided, this
|
|
figure is saved. If an int is specified, the figure instance to
|
|
save is looked up by number.
|
|
"""
|
|
if not isinstance(figure, Figure):
|
|
if figure is None:
|
|
manager = Gcf.get_active()
|
|
else:
|
|
manager = Gcf.get_fig_manager(figure)
|
|
if manager is None:
|
|
raise ValueError("No figure {}".format(figure))
|
|
figure = manager.canvas.figure
|
|
|
|
try:
|
|
orig_canvas = figure.canvas
|
|
figure.canvas = FigureCanvasPgf(figure)
|
|
|
|
width, height = figure.get_size_inches()
|
|
if self._n_figures == 0:
|
|
self._write_header(width, height)
|
|
else:
|
|
# \pdfpagewidth and \pdfpageheight exist on pdftex, xetex, and
|
|
# luatex<0.85; they were renamed to \pagewidth and \pageheight
|
|
# on luatex>=0.85.
|
|
self._file.write(
|
|
br'\newpage'
|
|
br'\ifdefined\pdfpagewidth\pdfpagewidth'
|
|
br'\else\pagewidth\fi=%ain'
|
|
br'\ifdefined\pdfpageheight\pdfpageheight'
|
|
br'\else\pageheight\fi=%ain'
|
|
b'%%\n' % (width, height)
|
|
)
|
|
|
|
figure.savefig(self._file, format="pgf", **kwargs)
|
|
self._n_figures += 1
|
|
finally:
|
|
figure.canvas = orig_canvas
|
|
|
|
def get_pagecount(self):
|
|
"""
|
|
Returns the current number of pages in the multipage pdf file.
|
|
"""
|
|
return self._n_figures
|