1242 lines
42 KiB
Python
1242 lines
42 KiB
Python
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from collections import OrderedDict
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import base64
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import gzip
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import hashlib
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import io
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import itertools
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import logging
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import re
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import uuid
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import numpy as np
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from matplotlib import cbook, __version__, rcParams
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from matplotlib.backend_bases import (
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_Backend, FigureCanvasBase, FigureManagerBase, RendererBase)
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from matplotlib.backends.backend_mixed import MixedModeRenderer
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from matplotlib.colors import rgb2hex
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from matplotlib.font_manager import findfont, get_font
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from matplotlib.ft2font import LOAD_NO_HINTING
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from matplotlib.mathtext import MathTextParser
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from matplotlib.path import Path
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from matplotlib import _path
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from matplotlib.transforms import Affine2D, Affine2DBase
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from matplotlib import _png
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_log = logging.getLogger(__name__)
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backend_version = __version__
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# ----------------------------------------------------------------------
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# SimpleXMLWriter class
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#
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# Based on an original by Fredrik Lundh, but modified here to:
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# 1. Support modern Python idioms
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# 2. Remove encoding support (it's handled by the file writer instead)
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# 3. Support proper indentation
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# 4. Minify things a little bit
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# --------------------------------------------------------------------
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# The SimpleXMLWriter module is
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#
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# Copyright (c) 2001-2004 by Fredrik Lundh
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#
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# By obtaining, using, and/or copying this software and/or its
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# associated documentation, you agree that you have read, understood,
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# and will comply with the following terms and conditions:
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#
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# Permission to use, copy, modify, and distribute this software and
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# its associated documentation for any purpose and without fee is
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# hereby granted, provided that the above copyright notice appears in
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# all copies, and that both that copyright notice and this permission
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# notice appear in supporting documentation, and that the name of
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# Secret Labs AB or the author not be used in advertising or publicity
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# pertaining to distribution of the software without specific, written
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# prior permission.
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#
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# SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
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# TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
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# ABILITY AND FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR
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# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
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# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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# OF THIS SOFTWARE.
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# --------------------------------------------------------------------
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def escape_cdata(s):
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s = s.replace("&", "&")
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s = s.replace("<", "<")
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s = s.replace(">", ">")
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return s
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_escape_xml_comment = re.compile(r'-(?=-)')
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def escape_comment(s):
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s = escape_cdata(s)
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return _escape_xml_comment.sub('- ', s)
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def escape_attrib(s):
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s = s.replace("&", "&")
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s = s.replace("'", "'")
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s = s.replace('"', """)
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s = s.replace("<", "<")
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s = s.replace(">", ">")
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return s
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def short_float_fmt(x):
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"""
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Create a short string representation of a float, which is %f
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formatting with trailing zeros and the decimal point removed.
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"""
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return '{0:f}'.format(x).rstrip('0').rstrip('.')
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class XMLWriter:
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"""
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Parameters
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----------
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file : writable text file-like object
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"""
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def __init__(self, file):
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self.__write = file.write
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if hasattr(file, "flush"):
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self.flush = file.flush
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self.__open = 0 # true if start tag is open
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self.__tags = []
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self.__data = []
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self.__indentation = " " * 64
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def __flush(self, indent=True):
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# flush internal buffers
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if self.__open:
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if indent:
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self.__write(">\n")
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else:
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self.__write(">")
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self.__open = 0
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if self.__data:
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data = ''.join(self.__data)
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self.__write(escape_cdata(data))
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self.__data = []
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def start(self, tag, attrib={}, **extra):
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"""
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Opens a new element. Attributes can be given as keyword
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arguments, or as a string/string dictionary. The method returns
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an opaque identifier that can be passed to the :meth:`close`
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method, to close all open elements up to and including this one.
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Parameters
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----------
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tag
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Element tag.
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attrib
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Attribute dictionary. Alternatively, attributes can be given as
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keyword arguments.
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Returns
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-------
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An element identifier.
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"""
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self.__flush()
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tag = escape_cdata(tag)
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self.__data = []
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self.__tags.append(tag)
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self.__write(self.__indentation[:len(self.__tags) - 1])
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self.__write("<%s" % tag)
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for k, v in sorted({**attrib, **extra}.items()):
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if v:
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k = escape_cdata(k)
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v = escape_attrib(v)
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self.__write(' %s="%s"' % (k, v))
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self.__open = 1
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return len(self.__tags) - 1
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def comment(self, comment):
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"""
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Adds a comment to the output stream.
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Parameters
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----------
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comment : str
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Comment text.
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"""
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self.__flush()
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self.__write(self.__indentation[:len(self.__tags)])
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self.__write("<!-- %s -->\n" % escape_comment(comment))
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def data(self, text):
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"""
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Adds character data to the output stream.
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Parameters
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----------
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text : str
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Character data.
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"""
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self.__data.append(text)
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def end(self, tag=None, indent=True):
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"""
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Closes the current element (opened by the most recent call to
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:meth:`start`).
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Parameters
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----------
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tag
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Element tag. If given, the tag must match the start tag. If
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omitted, the current element is closed.
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"""
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if tag:
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assert self.__tags, "unbalanced end(%s)" % tag
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assert escape_cdata(tag) == self.__tags[-1], \
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"expected end(%s), got %s" % (self.__tags[-1], tag)
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else:
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assert self.__tags, "unbalanced end()"
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tag = self.__tags.pop()
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if self.__data:
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self.__flush(indent)
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elif self.__open:
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self.__open = 0
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self.__write("/>\n")
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return
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if indent:
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self.__write(self.__indentation[:len(self.__tags)])
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self.__write("</%s>\n" % tag)
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def close(self, id):
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"""
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Closes open elements, up to (and including) the element identified
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by the given identifier.
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Parameters
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----------
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id
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Element identifier, as returned by the :meth:`start` method.
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"""
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while len(self.__tags) > id:
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self.end()
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def element(self, tag, text=None, attrib={}, **extra):
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"""
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Adds an entire element. This is the same as calling :meth:`start`,
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:meth:`data`, and :meth:`end` in sequence. The *text* argument can be
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omitted.
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"""
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self.start(tag, attrib, **extra)
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if text:
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self.data(text)
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self.end(indent=False)
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def flush(self):
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"""Flushes the output stream."""
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pass # replaced by the constructor
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def generate_transform(transform_list=[]):
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if len(transform_list):
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output = io.StringIO()
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for type, value in transform_list:
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if (type == 'scale' and (value == (1,) or value == (1, 1))
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or type == 'translate' and value == (0, 0)
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or type == 'rotate' and value == (0,)):
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continue
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if type == 'matrix' and isinstance(value, Affine2DBase):
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value = value.to_values()
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output.write('%s(%s)' % (
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type, ' '.join(short_float_fmt(x) for x in value)))
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return output.getvalue()
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return ''
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def generate_css(attrib={}):
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if attrib:
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output = io.StringIO()
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attrib = sorted(attrib.items())
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for k, v in attrib:
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k = escape_attrib(k)
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v = escape_attrib(v)
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output.write("%s:%s;" % (k, v))
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return output.getvalue()
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return ''
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_capstyle_d = {'projecting': 'square', 'butt': 'butt', 'round': 'round'}
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class RendererSVG(RendererBase):
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def __init__(self, width, height, svgwriter, basename=None, image_dpi=72):
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self.width = width
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self.height = height
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self.writer = XMLWriter(svgwriter)
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self.image_dpi = image_dpi # actual dpi at which we rasterize stuff
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self._groupd = {}
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self.basename = basename
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self._image_counter = itertools.count()
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self._clipd = OrderedDict()
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self._markers = {}
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self._path_collection_id = 0
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self._hatchd = OrderedDict()
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self._has_gouraud = False
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self._n_gradients = 0
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self._fonts = OrderedDict()
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self.mathtext_parser = MathTextParser('SVG')
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RendererBase.__init__(self)
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self._glyph_map = dict()
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str_height = short_float_fmt(height)
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str_width = short_float_fmt(width)
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svgwriter.write(svgProlog)
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self._start_id = self.writer.start(
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'svg',
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width='%spt' % str_width,
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height='%spt' % str_height,
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viewBox='0 0 %s %s' % (str_width, str_height),
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xmlns="http://www.w3.org/2000/svg",
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version="1.1",
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attrib={'xmlns:xlink': "http://www.w3.org/1999/xlink"})
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self._write_default_style()
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def finalize(self):
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self._write_clips()
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self._write_hatches()
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self.writer.close(self._start_id)
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self.writer.flush()
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def _write_default_style(self):
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writer = self.writer
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default_style = generate_css({
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'stroke-linejoin': 'round',
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'stroke-linecap': 'butt'})
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writer.start('defs')
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writer.start('style', type='text/css')
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writer.data('*{%s}\n' % default_style)
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writer.end('style')
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writer.end('defs')
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def _make_id(self, type, content):
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salt = rcParams['svg.hashsalt']
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if salt is None:
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salt = str(uuid.uuid4())
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m = hashlib.md5()
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m.update(salt.encode('utf8'))
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m.update(str(content).encode('utf8'))
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return '%s%s' % (type, m.hexdigest()[:10])
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def _make_flip_transform(self, transform):
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return (transform +
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Affine2D()
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.scale(1.0, -1.0)
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.translate(0.0, self.height))
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def _get_font(self, prop):
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fname = findfont(prop)
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font = get_font(fname)
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font.clear()
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size = prop.get_size_in_points()
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font.set_size(size, 72.0)
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return font
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def _get_hatch(self, gc, rgbFace):
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"""
|
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Create a new hatch pattern
|
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"""
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if rgbFace is not None:
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rgbFace = tuple(rgbFace)
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edge = gc.get_hatch_color()
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if edge is not None:
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edge = tuple(edge)
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dictkey = (gc.get_hatch(), rgbFace, edge)
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oid = self._hatchd.get(dictkey)
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if oid is None:
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oid = self._make_id('h', dictkey)
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self._hatchd[dictkey] = ((gc.get_hatch_path(), rgbFace, edge), oid)
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else:
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_, oid = oid
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return oid
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def _write_hatches(self):
|
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|
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if not len(self._hatchd):
|
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return
|
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HATCH_SIZE = 72
|
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|
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writer = self.writer
|
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writer.start('defs')
|
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for (path, face, stroke), oid in self._hatchd.values():
|
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writer.start(
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'pattern',
|
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id=oid,
|
||
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patternUnits="userSpaceOnUse",
|
||
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x="0", y="0", width=str(HATCH_SIZE),
|
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height=str(HATCH_SIZE))
|
||
|
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path_data = self._convert_path(
|
||
|
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path,
|
||
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Affine2D()
|
||
|
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.scale(HATCH_SIZE).scale(1.0, -1.0).translate(0, HATCH_SIZE),
|
||
|
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simplify=False)
|
||
|
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if face is None:
|
||
|
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fill = 'none'
|
||
|
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else:
|
||
|
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fill = rgb2hex(face)
|
||
|
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writer.element(
|
||
|
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'rect',
|
||
|
|
x="0", y="0", width=str(HATCH_SIZE+1),
|
||
|
|
height=str(HATCH_SIZE+1),
|
||
|
|
fill=fill)
|
||
|
|
writer.element(
|
||
|
|
'path',
|
||
|
|
d=path_data,
|
||
|
|
style=generate_css({
|
||
|
|
'fill': rgb2hex(stroke),
|
||
|
|
'stroke': rgb2hex(stroke),
|
||
|
|
'stroke-width': str(rcParams['hatch.linewidth']),
|
||
|
|
'stroke-linecap': 'butt',
|
||
|
|
'stroke-linejoin': 'miter'
|
||
|
|
})
|
||
|
|
)
|
||
|
|
writer.end('pattern')
|
||
|
|
writer.end('defs')
|
||
|
|
|
||
|
|
def _get_style_dict(self, gc, rgbFace):
|
||
|
|
"""Generate a style string from the GraphicsContext and rgbFace."""
|
||
|
|
attrib = {}
|
||
|
|
|
||
|
|
forced_alpha = gc.get_forced_alpha()
|
||
|
|
|
||
|
|
if gc.get_hatch() is not None:
|
||
|
|
attrib['fill'] = "url(#%s)" % self._get_hatch(gc, rgbFace)
|
||
|
|
if (rgbFace is not None and len(rgbFace) == 4 and rgbFace[3] != 1.0
|
||
|
|
and not forced_alpha):
|
||
|
|
attrib['fill-opacity'] = short_float_fmt(rgbFace[3])
|
||
|
|
else:
|
||
|
|
if rgbFace is None:
|
||
|
|
attrib['fill'] = 'none'
|
||
|
|
else:
|
||
|
|
if tuple(rgbFace[:3]) != (0, 0, 0):
|
||
|
|
attrib['fill'] = rgb2hex(rgbFace)
|
||
|
|
if (len(rgbFace) == 4 and rgbFace[3] != 1.0
|
||
|
|
and not forced_alpha):
|
||
|
|
attrib['fill-opacity'] = short_float_fmt(rgbFace[3])
|
||
|
|
|
||
|
|
if forced_alpha and gc.get_alpha() != 1.0:
|
||
|
|
attrib['opacity'] = short_float_fmt(gc.get_alpha())
|
||
|
|
|
||
|
|
offset, seq = gc.get_dashes()
|
||
|
|
if seq is not None:
|
||
|
|
attrib['stroke-dasharray'] = ','.join(
|
||
|
|
short_float_fmt(val) for val in seq)
|
||
|
|
attrib['stroke-dashoffset'] = short_float_fmt(float(offset))
|
||
|
|
|
||
|
|
linewidth = gc.get_linewidth()
|
||
|
|
if linewidth:
|
||
|
|
rgb = gc.get_rgb()
|
||
|
|
attrib['stroke'] = rgb2hex(rgb)
|
||
|
|
if not forced_alpha and rgb[3] != 1.0:
|
||
|
|
attrib['stroke-opacity'] = short_float_fmt(rgb[3])
|
||
|
|
if linewidth != 1.0:
|
||
|
|
attrib['stroke-width'] = short_float_fmt(linewidth)
|
||
|
|
if gc.get_joinstyle() != 'round':
|
||
|
|
attrib['stroke-linejoin'] = gc.get_joinstyle()
|
||
|
|
if gc.get_capstyle() != 'butt':
|
||
|
|
attrib['stroke-linecap'] = _capstyle_d[gc.get_capstyle()]
|
||
|
|
|
||
|
|
return attrib
|
||
|
|
|
||
|
|
def _get_style(self, gc, rgbFace):
|
||
|
|
return generate_css(self._get_style_dict(gc, rgbFace))
|
||
|
|
|
||
|
|
def _get_clip(self, gc):
|
||
|
|
cliprect = gc.get_clip_rectangle()
|
||
|
|
clippath, clippath_trans = gc.get_clip_path()
|
||
|
|
if clippath is not None:
|
||
|
|
clippath_trans = self._make_flip_transform(clippath_trans)
|
||
|
|
dictkey = (id(clippath), str(clippath_trans))
|
||
|
|
elif cliprect is not None:
|
||
|
|
x, y, w, h = cliprect.bounds
|
||
|
|
y = self.height-(y+h)
|
||
|
|
dictkey = (x, y, w, h)
|
||
|
|
else:
|
||
|
|
return None
|
||
|
|
|
||
|
|
clip = self._clipd.get(dictkey)
|
||
|
|
if clip is None:
|
||
|
|
oid = self._make_id('p', dictkey)
|
||
|
|
if clippath is not None:
|
||
|
|
self._clipd[dictkey] = ((clippath, clippath_trans), oid)
|
||
|
|
else:
|
||
|
|
self._clipd[dictkey] = (dictkey, oid)
|
||
|
|
else:
|
||
|
|
clip, oid = clip
|
||
|
|
return oid
|
||
|
|
|
||
|
|
def _write_clips(self):
|
||
|
|
if not len(self._clipd):
|
||
|
|
return
|
||
|
|
writer = self.writer
|
||
|
|
writer.start('defs')
|
||
|
|
for clip, oid in self._clipd.values():
|
||
|
|
writer.start('clipPath', id=oid)
|
||
|
|
if len(clip) == 2:
|
||
|
|
clippath, clippath_trans = clip
|
||
|
|
path_data = self._convert_path(
|
||
|
|
clippath, clippath_trans, simplify=False)
|
||
|
|
writer.element('path', d=path_data)
|
||
|
|
else:
|
||
|
|
x, y, w, h = clip
|
||
|
|
writer.element(
|
||
|
|
'rect',
|
||
|
|
x=short_float_fmt(x),
|
||
|
|
y=short_float_fmt(y),
|
||
|
|
width=short_float_fmt(w),
|
||
|
|
height=short_float_fmt(h))
|
||
|
|
writer.end('clipPath')
|
||
|
|
writer.end('defs')
|
||
|
|
|
||
|
|
def open_group(self, s, gid=None):
|
||
|
|
# docstring inherited
|
||
|
|
if gid:
|
||
|
|
self.writer.start('g', id=gid)
|
||
|
|
else:
|
||
|
|
self._groupd[s] = self._groupd.get(s, 0) + 1
|
||
|
|
self.writer.start('g', id="%s_%d" % (s, self._groupd[s]))
|
||
|
|
|
||
|
|
def close_group(self, s):
|
||
|
|
# docstring inherited
|
||
|
|
self.writer.end('g')
|
||
|
|
|
||
|
|
def option_image_nocomposite(self):
|
||
|
|
# docstring inherited
|
||
|
|
return not rcParams['image.composite_image']
|
||
|
|
|
||
|
|
def _convert_path(self, path, transform=None, clip=None, simplify=None,
|
||
|
|
sketch=None):
|
||
|
|
if clip:
|
||
|
|
clip = (0.0, 0.0, self.width, self.height)
|
||
|
|
else:
|
||
|
|
clip = None
|
||
|
|
return _path.convert_to_string(
|
||
|
|
path, transform, clip, simplify, sketch, 6,
|
||
|
|
[b'M', b'L', b'Q', b'C', b'z'], False).decode('ascii')
|
||
|
|
|
||
|
|
def draw_path(self, gc, path, transform, rgbFace=None):
|
||
|
|
# docstring inherited
|
||
|
|
trans_and_flip = self._make_flip_transform(transform)
|
||
|
|
clip = (rgbFace is None and gc.get_hatch_path() is None)
|
||
|
|
simplify = path.should_simplify and clip
|
||
|
|
path_data = self._convert_path(
|
||
|
|
path, trans_and_flip, clip=clip, simplify=simplify,
|
||
|
|
sketch=gc.get_sketch_params())
|
||
|
|
|
||
|
|
attrib = {}
|
||
|
|
attrib['style'] = self._get_style(gc, rgbFace)
|
||
|
|
|
||
|
|
clipid = self._get_clip(gc)
|
||
|
|
if clipid is not None:
|
||
|
|
attrib['clip-path'] = 'url(#%s)' % clipid
|
||
|
|
|
||
|
|
if gc.get_url() is not None:
|
||
|
|
self.writer.start('a', {'xlink:href': gc.get_url()})
|
||
|
|
self.writer.element('path', d=path_data, attrib=attrib)
|
||
|
|
if gc.get_url() is not None:
|
||
|
|
self.writer.end('a')
|
||
|
|
|
||
|
|
def draw_markers(
|
||
|
|
self, gc, marker_path, marker_trans, path, trans, rgbFace=None):
|
||
|
|
# docstring inherited
|
||
|
|
|
||
|
|
if not len(path.vertices):
|
||
|
|
return
|
||
|
|
|
||
|
|
writer = self.writer
|
||
|
|
path_data = self._convert_path(
|
||
|
|
marker_path,
|
||
|
|
marker_trans + Affine2D().scale(1.0, -1.0),
|
||
|
|
simplify=False)
|
||
|
|
style = self._get_style_dict(gc, rgbFace)
|
||
|
|
dictkey = (path_data, generate_css(style))
|
||
|
|
oid = self._markers.get(dictkey)
|
||
|
|
style = generate_css({k: v for k, v in style.items()
|
||
|
|
if k.startswith('stroke')})
|
||
|
|
|
||
|
|
if oid is None:
|
||
|
|
oid = self._make_id('m', dictkey)
|
||
|
|
writer.start('defs')
|
||
|
|
writer.element('path', id=oid, d=path_data, style=style)
|
||
|
|
writer.end('defs')
|
||
|
|
self._markers[dictkey] = oid
|
||
|
|
|
||
|
|
attrib = {}
|
||
|
|
clipid = self._get_clip(gc)
|
||
|
|
if clipid is not None:
|
||
|
|
attrib['clip-path'] = 'url(#%s)' % clipid
|
||
|
|
writer.start('g', attrib=attrib)
|
||
|
|
|
||
|
|
trans_and_flip = self._make_flip_transform(trans)
|
||
|
|
attrib = {'xlink:href': '#%s' % oid}
|
||
|
|
clip = (0, 0, self.width*72, self.height*72)
|
||
|
|
for vertices, code in path.iter_segments(
|
||
|
|
trans_and_flip, clip=clip, simplify=False):
|
||
|
|
if len(vertices):
|
||
|
|
x, y = vertices[-2:]
|
||
|
|
attrib['x'] = short_float_fmt(x)
|
||
|
|
attrib['y'] = short_float_fmt(y)
|
||
|
|
attrib['style'] = self._get_style(gc, rgbFace)
|
||
|
|
writer.element('use', attrib=attrib)
|
||
|
|
writer.end('g')
|
||
|
|
|
||
|
|
def draw_path_collection(self, gc, master_transform, paths, all_transforms,
|
||
|
|
offsets, offsetTrans, facecolors, edgecolors,
|
||
|
|
linewidths, linestyles, antialiaseds, urls,
|
||
|
|
offset_position):
|
||
|
|
# Is the optimization worth it? Rough calculation:
|
||
|
|
# cost of emitting a path in-line is
|
||
|
|
# (len_path + 5) * uses_per_path
|
||
|
|
# cost of definition+use is
|
||
|
|
# (len_path + 3) + 9 * uses_per_path
|
||
|
|
len_path = len(paths[0].vertices) if len(paths) > 0 else 0
|
||
|
|
uses_per_path = self._iter_collection_uses_per_path(
|
||
|
|
paths, all_transforms, offsets, facecolors, edgecolors)
|
||
|
|
should_do_optimization = \
|
||
|
|
len_path + 9 * uses_per_path + 3 < (len_path + 5) * uses_per_path
|
||
|
|
if not should_do_optimization:
|
||
|
|
return RendererBase.draw_path_collection(
|
||
|
|
self, gc, master_transform, paths, all_transforms,
|
||
|
|
offsets, offsetTrans, facecolors, edgecolors,
|
||
|
|
linewidths, linestyles, antialiaseds, urls,
|
||
|
|
offset_position)
|
||
|
|
|
||
|
|
writer = self.writer
|
||
|
|
path_codes = []
|
||
|
|
writer.start('defs')
|
||
|
|
for i, (path, transform) in enumerate(self._iter_collection_raw_paths(
|
||
|
|
master_transform, paths, all_transforms)):
|
||
|
|
transform = Affine2D(transform.get_matrix()).scale(1.0, -1.0)
|
||
|
|
d = self._convert_path(path, transform, simplify=False)
|
||
|
|
oid = 'C%x_%x_%s' % (
|
||
|
|
self._path_collection_id, i, self._make_id('', d))
|
||
|
|
writer.element('path', id=oid, d=d)
|
||
|
|
path_codes.append(oid)
|
||
|
|
writer.end('defs')
|
||
|
|
|
||
|
|
for xo, yo, path_id, gc0, rgbFace in self._iter_collection(
|
||
|
|
gc, master_transform, all_transforms, path_codes, offsets,
|
||
|
|
offsetTrans, facecolors, edgecolors, linewidths, linestyles,
|
||
|
|
antialiaseds, urls, offset_position):
|
||
|
|
clipid = self._get_clip(gc0)
|
||
|
|
url = gc0.get_url()
|
||
|
|
if url is not None:
|
||
|
|
writer.start('a', attrib={'xlink:href': url})
|
||
|
|
if clipid is not None:
|
||
|
|
writer.start('g', attrib={'clip-path': 'url(#%s)' % clipid})
|
||
|
|
attrib = {
|
||
|
|
'xlink:href': '#%s' % path_id,
|
||
|
|
'x': short_float_fmt(xo),
|
||
|
|
'y': short_float_fmt(self.height - yo),
|
||
|
|
'style': self._get_style(gc0, rgbFace)
|
||
|
|
}
|
||
|
|
writer.element('use', attrib=attrib)
|
||
|
|
if clipid is not None:
|
||
|
|
writer.end('g')
|
||
|
|
if url is not None:
|
||
|
|
writer.end('a')
|
||
|
|
|
||
|
|
self._path_collection_id += 1
|
||
|
|
|
||
|
|
def draw_gouraud_triangle(self, gc, points, colors, trans):
|
||
|
|
# This uses a method described here:
|
||
|
|
#
|
||
|
|
# http://www.svgopen.org/2005/papers/Converting3DFaceToSVG/index.html
|
||
|
|
#
|
||
|
|
# that uses three overlapping linear gradients to simulate a
|
||
|
|
# Gouraud triangle. Each gradient goes from fully opaque in
|
||
|
|
# one corner to fully transparent along the opposite edge.
|
||
|
|
# The line between the stop points is perpendicular to the
|
||
|
|
# opposite edge. Underlying these three gradients is a solid
|
||
|
|
# triangle whose color is the average of all three points.
|
||
|
|
|
||
|
|
writer = self.writer
|
||
|
|
if not self._has_gouraud:
|
||
|
|
self._has_gouraud = True
|
||
|
|
writer.start(
|
||
|
|
'filter',
|
||
|
|
id='colorAdd')
|
||
|
|
writer.element(
|
||
|
|
'feComposite',
|
||
|
|
attrib={'in': 'SourceGraphic'},
|
||
|
|
in2='BackgroundImage',
|
||
|
|
operator='arithmetic',
|
||
|
|
k2="1", k3="1")
|
||
|
|
writer.end('filter')
|
||
|
|
# feColorMatrix filter to correct opacity
|
||
|
|
writer.start(
|
||
|
|
'filter',
|
||
|
|
id='colorMat')
|
||
|
|
writer.element(
|
||
|
|
'feColorMatrix',
|
||
|
|
attrib={'type': 'matrix'},
|
||
|
|
values='1 0 0 0 0 \n0 1 0 0 0 \n0 0 1 0 0' +
|
||
|
|
' \n1 1 1 1 0 \n0 0 0 0 1 ')
|
||
|
|
writer.end('filter')
|
||
|
|
|
||
|
|
avg_color = np.sum(colors[:, :], axis=0) / 3.0
|
||
|
|
# Just skip fully-transparent triangles
|
||
|
|
if avg_color[-1] == 0.0:
|
||
|
|
return
|
||
|
|
|
||
|
|
trans_and_flip = self._make_flip_transform(trans)
|
||
|
|
tpoints = trans_and_flip.transform(points)
|
||
|
|
|
||
|
|
writer.start('defs')
|
||
|
|
for i in range(3):
|
||
|
|
x1, y1 = tpoints[i]
|
||
|
|
x2, y2 = tpoints[(i + 1) % 3]
|
||
|
|
x3, y3 = tpoints[(i + 2) % 3]
|
||
|
|
c = colors[i][:]
|
||
|
|
|
||
|
|
if x2 == x3:
|
||
|
|
xb = x2
|
||
|
|
yb = y1
|
||
|
|
elif y2 == y3:
|
||
|
|
xb = x1
|
||
|
|
yb = y2
|
||
|
|
else:
|
||
|
|
m1 = (y2 - y3) / (x2 - x3)
|
||
|
|
b1 = y2 - (m1 * x2)
|
||
|
|
m2 = -(1.0 / m1)
|
||
|
|
b2 = y1 - (m2 * x1)
|
||
|
|
xb = (-b1 + b2) / (m1 - m2)
|
||
|
|
yb = m2 * xb + b2
|
||
|
|
|
||
|
|
writer.start(
|
||
|
|
'linearGradient',
|
||
|
|
id="GR%x_%d" % (self._n_gradients, i),
|
||
|
|
gradientUnits="userSpaceOnUse",
|
||
|
|
x1=short_float_fmt(x1), y1=short_float_fmt(y1),
|
||
|
|
x2=short_float_fmt(xb), y2=short_float_fmt(yb))
|
||
|
|
writer.element(
|
||
|
|
'stop',
|
||
|
|
offset='1',
|
||
|
|
style=generate_css({'stop-color': rgb2hex(avg_color),
|
||
|
|
'stop-opacity': short_float_fmt(c[-1])}))
|
||
|
|
writer.element(
|
||
|
|
'stop',
|
||
|
|
offset='0',
|
||
|
|
style=generate_css({'stop-color': rgb2hex(c),
|
||
|
|
'stop-opacity': "0"}))
|
||
|
|
|
||
|
|
writer.end('linearGradient')
|
||
|
|
|
||
|
|
writer.end('defs')
|
||
|
|
|
||
|
|
# triangle formation using "path"
|
||
|
|
dpath = "M " + short_float_fmt(x1)+',' + short_float_fmt(y1)
|
||
|
|
dpath += " L " + short_float_fmt(x2) + ',' + short_float_fmt(y2)
|
||
|
|
dpath += " " + short_float_fmt(x3) + ',' + short_float_fmt(y3) + " Z"
|
||
|
|
|
||
|
|
writer.element(
|
||
|
|
'path',
|
||
|
|
attrib={'d': dpath,
|
||
|
|
'fill': rgb2hex(avg_color),
|
||
|
|
'fill-opacity': '1',
|
||
|
|
'shape-rendering': "crispEdges"})
|
||
|
|
|
||
|
|
writer.start(
|
||
|
|
'g',
|
||
|
|
attrib={'stroke': "none",
|
||
|
|
'stroke-width': "0",
|
||
|
|
'shape-rendering': "crispEdges",
|
||
|
|
'filter': "url(#colorMat)"})
|
||
|
|
|
||
|
|
writer.element(
|
||
|
|
'path',
|
||
|
|
attrib={'d': dpath,
|
||
|
|
'fill': 'url(#GR%x_0)' % self._n_gradients,
|
||
|
|
'shape-rendering': "crispEdges"})
|
||
|
|
|
||
|
|
writer.element(
|
||
|
|
'path',
|
||
|
|
attrib={'d': dpath,
|
||
|
|
'fill': 'url(#GR%x_1)' % self._n_gradients,
|
||
|
|
'filter': 'url(#colorAdd)',
|
||
|
|
'shape-rendering': "crispEdges"})
|
||
|
|
|
||
|
|
writer.element(
|
||
|
|
'path',
|
||
|
|
attrib={'d': dpath,
|
||
|
|
'fill': 'url(#GR%x_2)' % self._n_gradients,
|
||
|
|
'filter': 'url(#colorAdd)',
|
||
|
|
'shape-rendering': "crispEdges"})
|
||
|
|
|
||
|
|
writer.end('g')
|
||
|
|
|
||
|
|
self._n_gradients += 1
|
||
|
|
|
||
|
|
def draw_gouraud_triangles(self, gc, triangles_array, colors_array,
|
||
|
|
transform):
|
||
|
|
attrib = {}
|
||
|
|
clipid = self._get_clip(gc)
|
||
|
|
if clipid is not None:
|
||
|
|
attrib['clip-path'] = 'url(#%s)' % clipid
|
||
|
|
|
||
|
|
self.writer.start('g', attrib=attrib)
|
||
|
|
|
||
|
|
transform = transform.frozen()
|
||
|
|
for tri, col in zip(triangles_array, colors_array):
|
||
|
|
self.draw_gouraud_triangle(gc, tri, col, transform)
|
||
|
|
|
||
|
|
self.writer.end('g')
|
||
|
|
|
||
|
|
def option_scale_image(self):
|
||
|
|
# docstring inherited
|
||
|
|
return True
|
||
|
|
|
||
|
|
def get_image_magnification(self):
|
||
|
|
return self.image_dpi / 72.0
|
||
|
|
|
||
|
|
def draw_image(self, gc, x, y, im, transform=None):
|
||
|
|
# docstring inherited
|
||
|
|
|
||
|
|
h, w = im.shape[:2]
|
||
|
|
|
||
|
|
if w == 0 or h == 0:
|
||
|
|
return
|
||
|
|
|
||
|
|
attrib = {}
|
||
|
|
clipid = self._get_clip(gc)
|
||
|
|
if clipid is not None:
|
||
|
|
# Can't apply clip-path directly to the image because the
|
||
|
|
# image has a transformation, which would also be applied
|
||
|
|
# to the clip-path
|
||
|
|
self.writer.start('g', attrib={'clip-path': 'url(#%s)' % clipid})
|
||
|
|
|
||
|
|
oid = gc.get_gid()
|
||
|
|
url = gc.get_url()
|
||
|
|
if url is not None:
|
||
|
|
self.writer.start('a', attrib={'xlink:href': url})
|
||
|
|
if rcParams['svg.image_inline']:
|
||
|
|
buf = _png.write_png(im, None)
|
||
|
|
oid = oid or self._make_id('image', buf)
|
||
|
|
attrib['xlink:href'] = (
|
||
|
|
"data:image/png;base64,\n" +
|
||
|
|
base64.b64encode(buf).decode('ascii'))
|
||
|
|
else:
|
||
|
|
if self.basename is None:
|
||
|
|
raise ValueError("Cannot save image data to filesystem when "
|
||
|
|
"writing SVG to an in-memory buffer")
|
||
|
|
filename = '{}.image{}.png'.format(
|
||
|
|
self.basename, next(self._image_counter))
|
||
|
|
_log.info('Writing image file for inclusion: %s', filename)
|
||
|
|
with open(filename, 'wb') as file:
|
||
|
|
_png.write_png(im, file)
|
||
|
|
oid = oid or 'Im_' + self._make_id('image', filename)
|
||
|
|
attrib['xlink:href'] = filename
|
||
|
|
|
||
|
|
attrib['id'] = oid
|
||
|
|
|
||
|
|
if transform is None:
|
||
|
|
w = 72.0 * w / self.image_dpi
|
||
|
|
h = 72.0 * h / self.image_dpi
|
||
|
|
|
||
|
|
self.writer.element(
|
||
|
|
'image',
|
||
|
|
transform=generate_transform([
|
||
|
|
('scale', (1, -1)), ('translate', (0, -h))]),
|
||
|
|
x=short_float_fmt(x),
|
||
|
|
y=short_float_fmt(-(self.height - y - h)),
|
||
|
|
width=short_float_fmt(w), height=short_float_fmt(h),
|
||
|
|
attrib=attrib)
|
||
|
|
else:
|
||
|
|
alpha = gc.get_alpha()
|
||
|
|
if alpha != 1.0:
|
||
|
|
attrib['opacity'] = short_float_fmt(alpha)
|
||
|
|
|
||
|
|
flipped = (
|
||
|
|
Affine2D().scale(1.0 / w, 1.0 / h) +
|
||
|
|
transform +
|
||
|
|
Affine2D()
|
||
|
|
.translate(x, y)
|
||
|
|
.scale(1.0, -1.0)
|
||
|
|
.translate(0.0, self.height))
|
||
|
|
|
||
|
|
attrib['transform'] = generate_transform(
|
||
|
|
[('matrix', flipped.frozen())])
|
||
|
|
self.writer.element(
|
||
|
|
'image',
|
||
|
|
width=short_float_fmt(w), height=short_float_fmt(h),
|
||
|
|
attrib=attrib)
|
||
|
|
|
||
|
|
if url is not None:
|
||
|
|
self.writer.end('a')
|
||
|
|
if clipid is not None:
|
||
|
|
self.writer.end('g')
|
||
|
|
|
||
|
|
def _adjust_char_id(self, char_id):
|
||
|
|
return char_id.replace("%20", "_")
|
||
|
|
|
||
|
|
def _draw_text_as_path(self, gc, x, y, s, prop, angle, ismath, mtext=None):
|
||
|
|
"""
|
||
|
|
draw the text by converting them to paths using textpath module.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
prop : `matplotlib.font_manager.FontProperties`
|
||
|
|
font property
|
||
|
|
|
||
|
|
s : str
|
||
|
|
text to be converted
|
||
|
|
|
||
|
|
usetex : bool
|
||
|
|
If True, use matplotlib usetex mode.
|
||
|
|
|
||
|
|
ismath : bool
|
||
|
|
If True, use mathtext parser. If "TeX", use *usetex* mode.
|
||
|
|
|
||
|
|
"""
|
||
|
|
writer = self.writer
|
||
|
|
|
||
|
|
writer.comment(s)
|
||
|
|
|
||
|
|
glyph_map = self._glyph_map
|
||
|
|
|
||
|
|
text2path = self._text2path
|
||
|
|
color = rgb2hex(gc.get_rgb())
|
||
|
|
fontsize = prop.get_size_in_points()
|
||
|
|
|
||
|
|
style = {}
|
||
|
|
if color != '#000000':
|
||
|
|
style['fill'] = color
|
||
|
|
|
||
|
|
alpha = gc.get_alpha() if gc.get_forced_alpha() else gc.get_rgb()[3]
|
||
|
|
if alpha != 1:
|
||
|
|
style['opacity'] = short_float_fmt(alpha)
|
||
|
|
|
||
|
|
if not ismath:
|
||
|
|
font = text2path._get_font(prop)
|
||
|
|
_glyphs = text2path.get_glyphs_with_font(
|
||
|
|
font, s, glyph_map=glyph_map, return_new_glyphs_only=True)
|
||
|
|
glyph_info, glyph_map_new, rects = _glyphs
|
||
|
|
|
||
|
|
if glyph_map_new:
|
||
|
|
writer.start('defs')
|
||
|
|
for char_id, glyph_path in glyph_map_new.items():
|
||
|
|
path = Path(*glyph_path)
|
||
|
|
path_data = self._convert_path(path, simplify=False)
|
||
|
|
writer.element('path', id=char_id, d=path_data)
|
||
|
|
writer.end('defs')
|
||
|
|
|
||
|
|
glyph_map.update(glyph_map_new)
|
||
|
|
|
||
|
|
attrib = {}
|
||
|
|
attrib['style'] = generate_css(style)
|
||
|
|
font_scale = fontsize / text2path.FONT_SCALE
|
||
|
|
attrib['transform'] = generate_transform([
|
||
|
|
('translate', (x, y)),
|
||
|
|
('rotate', (-angle,)),
|
||
|
|
('scale', (font_scale, -font_scale))])
|
||
|
|
|
||
|
|
writer.start('g', attrib=attrib)
|
||
|
|
for glyph_id, xposition, yposition, scale in glyph_info:
|
||
|
|
attrib = {'xlink:href': '#%s' % glyph_id}
|
||
|
|
if xposition != 0.0:
|
||
|
|
attrib['x'] = short_float_fmt(xposition)
|
||
|
|
if yposition != 0.0:
|
||
|
|
attrib['y'] = short_float_fmt(yposition)
|
||
|
|
writer.element(
|
||
|
|
'use',
|
||
|
|
attrib=attrib)
|
||
|
|
|
||
|
|
writer.end('g')
|
||
|
|
else:
|
||
|
|
if ismath == "TeX":
|
||
|
|
_glyphs = text2path.get_glyphs_tex(
|
||
|
|
prop, s, glyph_map=glyph_map, return_new_glyphs_only=True)
|
||
|
|
else:
|
||
|
|
_glyphs = text2path.get_glyphs_mathtext(
|
||
|
|
prop, s, glyph_map=glyph_map, return_new_glyphs_only=True)
|
||
|
|
|
||
|
|
glyph_info, glyph_map_new, rects = _glyphs
|
||
|
|
|
||
|
|
# We store the character glyphs w/o flipping. Instead, the
|
||
|
|
# coordinate will be flipped when these characters are used.
|
||
|
|
if glyph_map_new:
|
||
|
|
writer.start('defs')
|
||
|
|
for char_id, glyph_path in glyph_map_new.items():
|
||
|
|
char_id = self._adjust_char_id(char_id)
|
||
|
|
# Some characters are blank
|
||
|
|
if not len(glyph_path[0]):
|
||
|
|
path_data = ""
|
||
|
|
else:
|
||
|
|
path = Path(*glyph_path)
|
||
|
|
path_data = self._convert_path(path, simplify=False)
|
||
|
|
writer.element('path', id=char_id, d=path_data)
|
||
|
|
writer.end('defs')
|
||
|
|
|
||
|
|
glyph_map.update(glyph_map_new)
|
||
|
|
|
||
|
|
attrib = {}
|
||
|
|
font_scale = fontsize / text2path.FONT_SCALE
|
||
|
|
attrib['style'] = generate_css(style)
|
||
|
|
attrib['transform'] = generate_transform([
|
||
|
|
('translate', (x, y)),
|
||
|
|
('rotate', (-angle,)),
|
||
|
|
('scale', (font_scale, -font_scale))])
|
||
|
|
|
||
|
|
writer.start('g', attrib=attrib)
|
||
|
|
for char_id, xposition, yposition, scale in glyph_info:
|
||
|
|
char_id = self._adjust_char_id(char_id)
|
||
|
|
|
||
|
|
writer.element(
|
||
|
|
'use',
|
||
|
|
transform=generate_transform([
|
||
|
|
('translate', (xposition, yposition)),
|
||
|
|
('scale', (scale,)),
|
||
|
|
]),
|
||
|
|
attrib={'xlink:href': '#%s' % char_id})
|
||
|
|
|
||
|
|
for verts, codes in rects:
|
||
|
|
path = Path(verts, codes)
|
||
|
|
path_data = self._convert_path(path, simplify=False)
|
||
|
|
writer.element('path', d=path_data)
|
||
|
|
|
||
|
|
writer.end('g')
|
||
|
|
|
||
|
|
def _draw_text_as_text(self, gc, x, y, s, prop, angle, ismath, mtext=None):
|
||
|
|
writer = self.writer
|
||
|
|
|
||
|
|
color = rgb2hex(gc.get_rgb())
|
||
|
|
style = {}
|
||
|
|
if color != '#000000':
|
||
|
|
style['fill'] = color
|
||
|
|
|
||
|
|
alpha = gc.get_alpha() if gc.get_forced_alpha() else gc.get_rgb()[3]
|
||
|
|
if alpha != 1:
|
||
|
|
style['opacity'] = short_float_fmt(alpha)
|
||
|
|
|
||
|
|
if not ismath:
|
||
|
|
font = self._get_font(prop)
|
||
|
|
font.set_text(s, 0.0, flags=LOAD_NO_HINTING)
|
||
|
|
|
||
|
|
attrib = {}
|
||
|
|
# Must add "px" to workaround a Firefox bug
|
||
|
|
style['font-size'] = short_float_fmt(prop.get_size()) + 'px'
|
||
|
|
style['font-family'] = str(font.family_name)
|
||
|
|
style['font-style'] = prop.get_style().lower()
|
||
|
|
style['font-weight'] = str(prop.get_weight()).lower()
|
||
|
|
attrib['style'] = generate_css(style)
|
||
|
|
|
||
|
|
if mtext and (angle == 0 or mtext.get_rotation_mode() == "anchor"):
|
||
|
|
# If text anchoring can be supported, get the original
|
||
|
|
# coordinates and add alignment information.
|
||
|
|
|
||
|
|
# Get anchor coordinates.
|
||
|
|
transform = mtext.get_transform()
|
||
|
|
ax, ay = transform.transform(mtext.get_unitless_position())
|
||
|
|
ay = self.height - ay
|
||
|
|
|
||
|
|
# Don't do vertical anchor alignment. Most applications do not
|
||
|
|
# support 'alignment-baseline' yet. Apply the vertical layout
|
||
|
|
# to the anchor point manually for now.
|
||
|
|
angle_rad = np.deg2rad(angle)
|
||
|
|
dir_vert = np.array([np.sin(angle_rad), np.cos(angle_rad)])
|
||
|
|
v_offset = np.dot(dir_vert, [(x - ax), (y - ay)])
|
||
|
|
ax = ax + v_offset * dir_vert[0]
|
||
|
|
ay = ay + v_offset * dir_vert[1]
|
||
|
|
|
||
|
|
ha_mpl_to_svg = {'left': 'start', 'right': 'end',
|
||
|
|
'center': 'middle'}
|
||
|
|
style['text-anchor'] = ha_mpl_to_svg[mtext.get_ha()]
|
||
|
|
|
||
|
|
attrib['x'] = short_float_fmt(ax)
|
||
|
|
attrib['y'] = short_float_fmt(ay)
|
||
|
|
attrib['style'] = generate_css(style)
|
||
|
|
attrib['transform'] = "rotate(%s, %s, %s)" % (
|
||
|
|
short_float_fmt(-angle),
|
||
|
|
short_float_fmt(ax),
|
||
|
|
short_float_fmt(ay))
|
||
|
|
writer.element('text', s, attrib=attrib)
|
||
|
|
else:
|
||
|
|
attrib['transform'] = generate_transform([
|
||
|
|
('translate', (x, y)),
|
||
|
|
('rotate', (-angle,))])
|
||
|
|
|
||
|
|
writer.element('text', s, attrib=attrib)
|
||
|
|
|
||
|
|
else:
|
||
|
|
writer.comment(s)
|
||
|
|
|
||
|
|
width, height, descent, svg_elements, used_characters = \
|
||
|
|
self.mathtext_parser.parse(s, 72, prop)
|
||
|
|
svg_glyphs = svg_elements.svg_glyphs
|
||
|
|
svg_rects = svg_elements.svg_rects
|
||
|
|
|
||
|
|
attrib = {}
|
||
|
|
attrib['style'] = generate_css(style)
|
||
|
|
attrib['transform'] = generate_transform([
|
||
|
|
('translate', (x, y)),
|
||
|
|
('rotate', (-angle,))])
|
||
|
|
|
||
|
|
# Apply attributes to 'g', not 'text', because we likely have some
|
||
|
|
# rectangles as well with the same style and transformation.
|
||
|
|
writer.start('g', attrib=attrib)
|
||
|
|
|
||
|
|
writer.start('text')
|
||
|
|
|
||
|
|
# Sort the characters by font, and output one tspan for each.
|
||
|
|
spans = OrderedDict()
|
||
|
|
for font, fontsize, thetext, new_x, new_y, metrics in svg_glyphs:
|
||
|
|
style = generate_css({
|
||
|
|
'font-size': short_float_fmt(fontsize) + 'px',
|
||
|
|
'font-family': font.family_name,
|
||
|
|
'font-style': font.style_name.lower(),
|
||
|
|
'font-weight': font.style_name.lower()})
|
||
|
|
if thetext == 32:
|
||
|
|
thetext = 0xa0 # non-breaking space
|
||
|
|
spans.setdefault(style, []).append((new_x, -new_y, thetext))
|
||
|
|
|
||
|
|
for style, chars in spans.items():
|
||
|
|
chars.sort()
|
||
|
|
|
||
|
|
if len({y for x, y, t in chars}) == 1: # Are all y's the same?
|
||
|
|
ys = str(chars[0][1])
|
||
|
|
else:
|
||
|
|
ys = ' '.join(str(c[1]) for c in chars)
|
||
|
|
|
||
|
|
attrib = {
|
||
|
|
'style': style,
|
||
|
|
'x': ' '.join(short_float_fmt(c[0]) for c in chars),
|
||
|
|
'y': ys
|
||
|
|
}
|
||
|
|
|
||
|
|
writer.element(
|
||
|
|
'tspan',
|
||
|
|
''.join(chr(c[2]) for c in chars),
|
||
|
|
attrib=attrib)
|
||
|
|
|
||
|
|
writer.end('text')
|
||
|
|
|
||
|
|
if len(svg_rects):
|
||
|
|
for x, y, width, height in svg_rects:
|
||
|
|
writer.element(
|
||
|
|
'rect',
|
||
|
|
x=short_float_fmt(x),
|
||
|
|
y=short_float_fmt(-y + height),
|
||
|
|
width=short_float_fmt(width),
|
||
|
|
height=short_float_fmt(height)
|
||
|
|
)
|
||
|
|
|
||
|
|
writer.end('g')
|
||
|
|
|
||
|
|
def draw_tex(self, gc, x, y, s, prop, angle, ismath='TeX!', mtext=None):
|
||
|
|
# docstring inherited
|
||
|
|
self._draw_text_as_path(gc, x, y, s, prop, angle, ismath="TeX")
|
||
|
|
|
||
|
|
def draw_text(self, gc, x, y, s, prop, angle, ismath=False, mtext=None):
|
||
|
|
# docstring inherited
|
||
|
|
|
||
|
|
clipid = self._get_clip(gc)
|
||
|
|
if clipid is not None:
|
||
|
|
# Cannot apply clip-path directly to the text, because
|
||
|
|
# is has a transformation
|
||
|
|
self.writer.start(
|
||
|
|
'g', attrib={'clip-path': 'url(#%s)' % clipid})
|
||
|
|
|
||
|
|
if gc.get_url() is not None:
|
||
|
|
self.writer.start('a', {'xlink:href': gc.get_url()})
|
||
|
|
|
||
|
|
if rcParams['svg.fonttype'] == 'path':
|
||
|
|
self._draw_text_as_path(gc, x, y, s, prop, angle, ismath, mtext)
|
||
|
|
else:
|
||
|
|
self._draw_text_as_text(gc, x, y, s, prop, angle, ismath, mtext)
|
||
|
|
|
||
|
|
if gc.get_url() is not None:
|
||
|
|
self.writer.end('a')
|
||
|
|
|
||
|
|
if clipid is not None:
|
||
|
|
self.writer.end('g')
|
||
|
|
|
||
|
|
def flipy(self):
|
||
|
|
# docstring inherited
|
||
|
|
return True
|
||
|
|
|
||
|
|
def get_canvas_width_height(self):
|
||
|
|
# docstring inherited
|
||
|
|
return self.width, self.height
|
||
|
|
|
||
|
|
def get_text_width_height_descent(self, s, prop, ismath):
|
||
|
|
# docstring inherited
|
||
|
|
return self._text2path.get_text_width_height_descent(s, prop, ismath)
|
||
|
|
|
||
|
|
|
||
|
|
class FigureCanvasSVG(FigureCanvasBase):
|
||
|
|
filetypes = {'svg': 'Scalable Vector Graphics',
|
||
|
|
'svgz': 'Scalable Vector Graphics'}
|
||
|
|
|
||
|
|
fixed_dpi = 72
|
||
|
|
|
||
|
|
def print_svg(self, filename, *args, **kwargs):
|
||
|
|
with cbook.open_file_cm(filename, "w", encoding="utf-8") as fh:
|
||
|
|
|
||
|
|
filename = getattr(fh, 'name', '')
|
||
|
|
if not isinstance(filename, str):
|
||
|
|
filename = ''
|
||
|
|
|
||
|
|
if cbook.file_requires_unicode(fh):
|
||
|
|
detach = False
|
||
|
|
else:
|
||
|
|
fh = io.TextIOWrapper(fh, 'utf-8')
|
||
|
|
detach = True
|
||
|
|
|
||
|
|
result = self._print_svg(filename, fh, **kwargs)
|
||
|
|
|
||
|
|
# Detach underlying stream from wrapper so that it remains open in
|
||
|
|
# the caller.
|
||
|
|
if detach:
|
||
|
|
fh.detach()
|
||
|
|
|
||
|
|
return result
|
||
|
|
|
||
|
|
def print_svgz(self, filename, *args, **kwargs):
|
||
|
|
with cbook.open_file_cm(filename, "wb") as fh, \
|
||
|
|
gzip.GzipFile(mode='w', fileobj=fh) as gzipwriter:
|
||
|
|
return self.print_svg(gzipwriter)
|
||
|
|
|
||
|
|
def _print_svg(
|
||
|
|
self, filename, fh, *, dpi=72, bbox_inches_restore=None, **kwargs):
|
||
|
|
self.figure.set_dpi(72.0)
|
||
|
|
width, height = self.figure.get_size_inches()
|
||
|
|
w, h = width * 72, height * 72
|
||
|
|
|
||
|
|
renderer = MixedModeRenderer(
|
||
|
|
self.figure, width, height, dpi,
|
||
|
|
RendererSVG(w, h, fh, filename, dpi),
|
||
|
|
bbox_inches_restore=bbox_inches_restore)
|
||
|
|
|
||
|
|
self.figure.draw(renderer)
|
||
|
|
renderer.finalize()
|
||
|
|
|
||
|
|
def get_default_filetype(self):
|
||
|
|
return 'svg'
|
||
|
|
|
||
|
|
|
||
|
|
FigureManagerSVG = FigureManagerBase
|
||
|
|
|
||
|
|
|
||
|
|
svgProlog = """\
|
||
|
|
<?xml version="1.0" encoding="utf-8" standalone="no"?>
|
||
|
|
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
|
||
|
|
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
|
||
|
|
<!-- Created with matplotlib (https://matplotlib.org/) -->
|
||
|
|
"""
|
||
|
|
|
||
|
|
|
||
|
|
@_Backend.export
|
||
|
|
class _BackendSVG(_Backend):
|
||
|
|
FigureCanvas = FigureCanvasSVG
|