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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
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<title>matplotlib.textpath — Matplotlib 3.1.1 documentation</title>
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<h1>Source code for matplotlib.textpath</h1><div class="highlight"><pre>
<span></span><span class="kn">from</span> <span class="nn">collections</span> <span class="k">import</span> <span class="n">OrderedDict</span>
<span class="kn">import</span> <span class="nn">functools</span>
<span class="kn">import</span> <span class="nn">logging</span>
<span class="kn">import</span> <span class="nn">urllib.parse</span>
<span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
<span class="kn">from</span> <span class="nn">matplotlib</span> <span class="k">import</span> <span class="n">cbook</span><span class="p">,</span> <span class="n">dviread</span><span class="p">,</span> <span class="n">font_manager</span><span class="p">,</span> <span class="n">rcParams</span>
<span class="kn">from</span> <span class="nn">matplotlib.font_manager</span> <span class="k">import</span> <span class="n">FontProperties</span><span class="p">,</span> <span class="n">get_font</span>
<span class="kn">from</span> <span class="nn">matplotlib.ft2font</span> <span class="k">import</span> <span class="p">(</span>
<span class="n">KERNING_DEFAULT</span><span class="p">,</span> <span class="n">LOAD_NO_HINTING</span><span class="p">,</span> <span class="n">LOAD_TARGET_LIGHT</span><span class="p">)</span>
<span class="kn">from</span> <span class="nn">matplotlib.mathtext</span> <span class="k">import</span> <span class="n">MathTextParser</span>
<span class="kn">from</span> <span class="nn">matplotlib.path</span> <span class="k">import</span> <span class="n">Path</span>
<span class="kn">from</span> <span class="nn">matplotlib.transforms</span> <span class="k">import</span> <span class="n">Affine2D</span>
<span class="n">_log</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="vm">__name__</span><span class="p">)</span>
<div class="viewcode-block" id="TextToPath"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextToPath">[docs]</a><span class="k">class</span> <span class="nc">TextToPath</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""A class that converts strings to paths."""</span>
<span class="n">FONT_SCALE</span> <span class="o">=</span> <span class="mf">100.</span>
<span class="n">DPI</span> <span class="o">=</span> <span class="mi">72</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mathtext_parser</span> <span class="o">=</span> <span class="n">MathTextParser</span><span class="p">(</span><span class="s1">'path'</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_texmanager</span> <span class="o">=</span> <span class="kc">None</span>
<span class="nd">@property</span>
<span class="nd">@cbook</span><span class="o">.</span><span class="n">deprecated</span><span class="p">(</span><span class="s2">"3.0"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">tex_font_map</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="n">dviread</span><span class="o">.</span><span class="n">PsfontsMap</span><span class="p">(</span><span class="n">dviread</span><span class="o">.</span><span class="n">find_tex_file</span><span class="p">(</span><span class="s1">'pdftex.map'</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">_get_font</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prop</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Find the `FT2Font` matching font properties *prop*, with its size set.</span>
<span class="sd"> """</span>
<span class="n">fname</span> <span class="o">=</span> <span class="n">font_manager</span><span class="o">.</span><span class="n">findfont</span><span class="p">(</span><span class="n">prop</span><span class="p">)</span>
<span class="n">font</span> <span class="o">=</span> <span class="n">get_font</span><span class="p">(</span><span class="n">fname</span><span class="p">)</span>
<span class="n">font</span><span class="o">.</span><span class="n">set_size</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">DPI</span><span class="p">)</span>
<span class="k">return</span> <span class="n">font</span>
<span class="k">def</span> <span class="nf">_get_hinting_flag</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="n">LOAD_NO_HINTING</span>
<span class="k">def</span> <span class="nf">_get_char_id</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">font</span><span class="p">,</span> <span class="n">ccode</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Return a unique id for the given font and character-code set.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">urllib</span><span class="o">.</span><span class="n">parse</span><span class="o">.</span><span class="n">quote</span><span class="p">(</span><span class="s1">'</span><span class="si">{}</span><span class="s1">-</span><span class="si">{}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">font</span><span class="o">.</span><span class="n">postscript_name</span><span class="p">,</span> <span class="n">ccode</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">_get_char_id_ps</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">font</span><span class="p">,</span> <span class="n">ccode</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Return a unique id for the given font and character-code set (for tex).</span>
<span class="sd"> """</span>
<span class="n">ps_name</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_ps_font_info</span><span class="p">()[</span><span class="mi">2</span><span class="p">]</span>
<span class="n">char_id</span> <span class="o">=</span> <span class="n">urllib</span><span class="o">.</span><span class="n">parse</span><span class="o">.</span><span class="n">quote</span><span class="p">(</span><span class="s1">'</span><span class="si">%s</span><span class="s1">-</span><span class="si">%d</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">ps_name</span><span class="p">,</span> <span class="n">ccode</span><span class="p">))</span>
<span class="k">return</span> <span class="n">char_id</span>
<div class="viewcode-block" id="TextToPath.glyph_to_path"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextToPath.glyph_to_path">[docs]</a> <span class="nd">@cbook</span><span class="o">.</span><span class="n">deprecated</span><span class="p">(</span>
<span class="s2">"3.1"</span><span class="p">,</span>
<span class="n">alternative</span><span class="o">=</span><span class="s2">"font.get_path() and manual translation of the vertices"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">glyph_to_path</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">font</span><span class="p">,</span> <span class="n">currx</span><span class="o">=</span><span class="mf">0.</span><span class="p">):</span>
<span class="sd">"""Convert the *font*'s current glyph to a (vertices, codes) pair."""</span>
<span class="n">verts</span><span class="p">,</span> <span class="n">codes</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_path</span><span class="p">()</span>
<span class="k">if</span> <span class="n">currx</span> <span class="o">!=</span> <span class="mf">0.0</span><span class="p">:</span>
<span class="n">verts</span><span class="p">[:,</span> <span class="mi">0</span><span class="p">]</span> <span class="o">+=</span> <span class="n">currx</span>
<span class="k">return</span> <span class="n">verts</span><span class="p">,</span> <span class="n">codes</span></div>
<div class="viewcode-block" id="TextToPath.get_text_width_height_descent"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextToPath.get_text_width_height_descent">[docs]</a> <span class="k">def</span> <span class="nf">get_text_width_height_descent</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">prop</span><span class="p">,</span> <span class="n">ismath</span><span class="p">):</span>
<span class="k">if</span> <span class="n">rcParams</span><span class="p">[</span><span class="s1">'text.usetex'</span><span class="p">]:</span>
<span class="n">texmanager</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_texmanager</span><span class="p">()</span>
<span class="n">fontsize</span> <span class="o">=</span> <span class="n">prop</span><span class="o">.</span><span class="n">get_size_in_points</span><span class="p">()</span>
<span class="n">w</span><span class="p">,</span> <span class="n">h</span><span class="p">,</span> <span class="n">d</span> <span class="o">=</span> <span class="n">texmanager</span><span class="o">.</span><span class="n">get_text_width_height_descent</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">fontsize</span><span class="p">,</span>
<span class="n">renderer</span><span class="o">=</span><span class="kc">None</span><span class="p">)</span>
<span class="k">return</span> <span class="n">w</span><span class="p">,</span> <span class="n">h</span><span class="p">,</span> <span class="n">d</span>
<span class="n">fontsize</span> <span class="o">=</span> <span class="n">prop</span><span class="o">.</span><span class="n">get_size_in_points</span><span class="p">()</span>
<span class="n">scale</span> <span class="o">=</span> <span class="n">fontsize</span> <span class="o">/</span> <span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span>
<span class="k">if</span> <span class="n">ismath</span><span class="p">:</span>
<span class="n">prop</span> <span class="o">=</span> <span class="n">prop</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="n">prop</span><span class="o">.</span><span class="n">set_size</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">)</span>
<span class="n">width</span><span class="p">,</span> <span class="n">height</span><span class="p">,</span> <span class="n">descent</span><span class="p">,</span> <span class="n">trash</span><span class="p">,</span> <span class="n">used_characters</span> <span class="o">=</span> \
<span class="bp">self</span><span class="o">.</span><span class="n">mathtext_parser</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="mi">72</span><span class="p">,</span> <span class="n">prop</span><span class="p">)</span>
<span class="k">return</span> <span class="n">width</span> <span class="o">*</span> <span class="n">scale</span><span class="p">,</span> <span class="n">height</span> <span class="o">*</span> <span class="n">scale</span><span class="p">,</span> <span class="n">descent</span> <span class="o">*</span> <span class="n">scale</span>
<span class="n">font</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_font</span><span class="p">(</span><span class="n">prop</span><span class="p">)</span>
<span class="n">font</span><span class="o">.</span><span class="n">set_text</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="mf">0.0</span><span class="p">,</span> <span class="n">flags</span><span class="o">=</span><span class="n">LOAD_NO_HINTING</span><span class="p">)</span>
<span class="n">w</span><span class="p">,</span> <span class="n">h</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_width_height</span><span class="p">()</span>
<span class="n">w</span> <span class="o">/=</span> <span class="mf">64.0</span> <span class="c1"># convert from subpixels</span>
<span class="n">h</span> <span class="o">/=</span> <span class="mf">64.0</span>
<span class="n">d</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_descent</span><span class="p">()</span>
<span class="n">d</span> <span class="o">/=</span> <span class="mf">64.0</span>
<span class="k">return</span> <span class="n">w</span> <span class="o">*</span> <span class="n">scale</span><span class="p">,</span> <span class="n">h</span> <span class="o">*</span> <span class="n">scale</span><span class="p">,</span> <span class="n">d</span> <span class="o">*</span> <span class="n">scale</span></div>
<div class="viewcode-block" id="TextToPath.get_text_path"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextToPath.get_text_path">[docs]</a> <span class="nd">@cbook</span><span class="o">.</span><span class="n">_delete_parameter</span><span class="p">(</span><span class="s2">"3.1"</span><span class="p">,</span> <span class="s2">"usetex"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_text_path</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prop</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">ismath</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">usetex</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Convert text *s* to path (a tuple of vertices and codes for</span>
<span class="sd"> matplotlib.path.Path).</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> prop : `matplotlib.font_manager.FontProperties` instance</span>
<span class="sd"> The font properties for the text.</span>
<span class="sd"> s : str</span>
<span class="sd"> The text to be converted.</span>
<span class="sd"> ismath : {False, True, "TeX"}</span>
<span class="sd"> If True, use mathtext parser. If "TeX", use tex for renderering.</span>
<span class="sd"> usetex : bool, optional</span>
<span class="sd"> If set, forces *ismath* to True. This parameter is deprecated.</span>
<span class="sd"> Returns</span>
<span class="sd"> -------</span>
<span class="sd"> verts, codes : tuple of lists</span>
<span class="sd"> *verts* is a list of numpy arrays containing the x and y</span>
<span class="sd"> coordinates of the vertices. *codes* is a list of path codes.</span>
<span class="sd"> Examples</span>
<span class="sd"> --------</span>
<span class="sd"> Create a list of vertices and codes from a text, and create a `Path`</span>
<span class="sd"> from those::</span>
<span class="sd"> from matplotlib.path import Path</span>
<span class="sd"> from matplotlib.textpath import TextToPath</span>
<span class="sd"> from matplotlib.font_manager import FontProperties</span>
<span class="sd"> fp = FontProperties(family="Humor Sans", style="italic")</span>
<span class="sd"> verts, codes = TextToPath().get_text_path(fp, "ABC")</span>
<span class="sd"> path = Path(verts, codes, closed=False)</span>
<span class="sd"> Also see `TextPath` for a more direct way to create a path from a text.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">usetex</span><span class="p">:</span>
<span class="n">ismath</span> <span class="o">=</span> <span class="s2">"TeX"</span>
<span class="k">if</span> <span class="n">ismath</span> <span class="o">==</span> <span class="s2">"TeX"</span><span class="p">:</span>
<span class="n">glyph_info</span><span class="p">,</span> <span class="n">glyph_map</span><span class="p">,</span> <span class="n">rects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_glyphs_tex</span><span class="p">(</span><span class="n">prop</span><span class="p">,</span> <span class="n">s</span><span class="p">)</span>
<span class="k">elif</span> <span class="ow">not</span> <span class="n">ismath</span><span class="p">:</span>
<span class="n">font</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_font</span><span class="p">(</span><span class="n">prop</span><span class="p">)</span>
<span class="n">glyph_info</span><span class="p">,</span> <span class="n">glyph_map</span><span class="p">,</span> <span class="n">rects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_glyphs_with_font</span><span class="p">(</span><span class="n">font</span><span class="p">,</span> <span class="n">s</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">glyph_info</span><span class="p">,</span> <span class="n">glyph_map</span><span class="p">,</span> <span class="n">rects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_glyphs_mathtext</span><span class="p">(</span><span class="n">prop</span><span class="p">,</span> <span class="n">s</span><span class="p">)</span>
<span class="n">verts</span><span class="p">,</span> <span class="n">codes</span> <span class="o">=</span> <span class="p">[],</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">glyph_id</span><span class="p">,</span> <span class="n">xposition</span><span class="p">,</span> <span class="n">yposition</span><span class="p">,</span> <span class="n">scale</span> <span class="ow">in</span> <span class="n">glyph_info</span><span class="p">:</span>
<span class="n">verts1</span><span class="p">,</span> <span class="n">codes1</span> <span class="o">=</span> <span class="n">glyph_map</span><span class="p">[</span><span class="n">glyph_id</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">verts1</span><span class="p">):</span>
<span class="n">verts1</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">verts1</span><span class="p">)</span> <span class="o">*</span> <span class="n">scale</span> <span class="o">+</span> <span class="p">[</span><span class="n">xposition</span><span class="p">,</span> <span class="n">yposition</span><span class="p">]</span>
<span class="n">verts</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">verts1</span><span class="p">)</span>
<span class="n">codes</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">codes1</span><span class="p">)</span>
<span class="k">for</span> <span class="n">verts1</span><span class="p">,</span> <span class="n">codes1</span> <span class="ow">in</span> <span class="n">rects</span><span class="p">:</span>
<span class="n">verts</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">verts1</span><span class="p">)</span>
<span class="n">codes</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">codes1</span><span class="p">)</span>
<span class="k">return</span> <span class="n">verts</span><span class="p">,</span> <span class="n">codes</span></div>
<div class="viewcode-block" id="TextToPath.get_glyphs_with_font"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextToPath.get_glyphs_with_font">[docs]</a> <span class="k">def</span> <span class="nf">get_glyphs_with_font</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">font</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">glyph_map</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">return_new_glyphs_only</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Convert string *s* to vertices and codes using the provided ttf font.</span>
<span class="sd"> """</span>
<span class="c1"># Mostly copied from backend_svg.py.</span>
<span class="n">lastgind</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">currx</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">xpositions</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">glyph_ids</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">if</span> <span class="n">glyph_map</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">glyph_map</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="k">if</span> <span class="n">return_new_glyphs_only</span><span class="p">:</span>
<span class="n">glyph_map_new</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">glyph_map_new</span> <span class="o">=</span> <span class="n">glyph_map</span>
<span class="c1"># I'm not sure if I get kernings right. Needs to be verified. -JJL</span>
<span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">s</span><span class="p">:</span>
<span class="n">ccode</span> <span class="o">=</span> <span class="nb">ord</span><span class="p">(</span><span class="n">c</span><span class="p">)</span>
<span class="n">gind</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_char_index</span><span class="p">(</span><span class="n">ccode</span><span class="p">)</span>
<span class="k">if</span> <span class="n">gind</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">ccode</span> <span class="o">=</span> <span class="nb">ord</span><span class="p">(</span><span class="s1">'?'</span><span class="p">)</span>
<span class="n">gind</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="n">lastgind</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">kern</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_kerning</span><span class="p">(</span><span class="n">lastgind</span><span class="p">,</span> <span class="n">gind</span><span class="p">,</span> <span class="n">KERNING_DEFAULT</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">kern</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">glyph</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">load_char</span><span class="p">(</span><span class="n">ccode</span><span class="p">,</span> <span class="n">flags</span><span class="o">=</span><span class="n">LOAD_NO_HINTING</span><span class="p">)</span>
<span class="n">horiz_advance</span> <span class="o">=</span> <span class="n">glyph</span><span class="o">.</span><span class="n">linearHoriAdvance</span> <span class="o">/</span> <span class="mi">65536</span>
<span class="n">char_id</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_char_id</span><span class="p">(</span><span class="n">font</span><span class="p">,</span> <span class="n">ccode</span><span class="p">)</span>
<span class="k">if</span> <span class="n">char_id</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">glyph_map</span><span class="p">:</span>
<span class="n">glyph_map_new</span><span class="p">[</span><span class="n">char_id</span><span class="p">]</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_path</span><span class="p">()</span>
<span class="n">currx</span> <span class="o">+=</span> <span class="n">kern</span> <span class="o">/</span> <span class="mi">64</span>
<span class="n">xpositions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">currx</span><span class="p">)</span>
<span class="n">glyph_ids</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">char_id</span><span class="p">)</span>
<span class="n">currx</span> <span class="o">+=</span> <span class="n">horiz_advance</span>
<span class="n">lastgind</span> <span class="o">=</span> <span class="n">gind</span>
<span class="n">ypositions</span> <span class="o">=</span> <span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">*</span> <span class="nb">len</span><span class="p">(</span><span class="n">xpositions</span><span class="p">)</span>
<span class="n">sizes</span> <span class="o">=</span> <span class="p">[</span><span class="mf">1.</span><span class="p">]</span> <span class="o">*</span> <span class="nb">len</span><span class="p">(</span><span class="n">xpositions</span><span class="p">)</span>
<span class="n">rects</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">return</span> <span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="nb">zip</span><span class="p">(</span><span class="n">glyph_ids</span><span class="p">,</span> <span class="n">xpositions</span><span class="p">,</span> <span class="n">ypositions</span><span class="p">,</span> <span class="n">sizes</span><span class="p">)),</span>
<span class="n">glyph_map_new</span><span class="p">,</span> <span class="n">rects</span><span class="p">)</span></div>
<div class="viewcode-block" id="TextToPath.get_glyphs_mathtext"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextToPath.get_glyphs_mathtext">[docs]</a> <span class="k">def</span> <span class="nf">get_glyphs_mathtext</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prop</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">glyph_map</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">return_new_glyphs_only</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Parse mathtext string *s* and convert it to a (vertices, codes) pair.</span>
<span class="sd"> """</span>
<span class="n">prop</span> <span class="o">=</span> <span class="n">prop</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="n">prop</span><span class="o">.</span><span class="n">set_size</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">)</span>
<span class="n">width</span><span class="p">,</span> <span class="n">height</span><span class="p">,</span> <span class="n">descent</span><span class="p">,</span> <span class="n">glyphs</span><span class="p">,</span> <span class="n">rects</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">mathtext_parser</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span>
<span class="n">s</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">DPI</span><span class="p">,</span> <span class="n">prop</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">glyph_map</span><span class="p">:</span>
<span class="n">glyph_map</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="k">if</span> <span class="n">return_new_glyphs_only</span><span class="p">:</span>
<span class="n">glyph_map_new</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">glyph_map_new</span> <span class="o">=</span> <span class="n">glyph_map</span>
<span class="n">xpositions</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">ypositions</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">glyph_ids</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">sizes</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">font</span><span class="p">,</span> <span class="n">fontsize</span><span class="p">,</span> <span class="n">ccode</span><span class="p">,</span> <span class="n">ox</span><span class="p">,</span> <span class="n">oy</span> <span class="ow">in</span> <span class="n">glyphs</span><span class="p">:</span>
<span class="n">char_id</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_char_id</span><span class="p">(</span><span class="n">font</span><span class="p">,</span> <span class="n">ccode</span><span class="p">)</span>
<span class="k">if</span> <span class="n">char_id</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">glyph_map</span><span class="p">:</span>
<span class="n">font</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="n">font</span><span class="o">.</span><span class="n">set_size</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">DPI</span><span class="p">)</span>
<span class="n">glyph</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">load_char</span><span class="p">(</span><span class="n">ccode</span><span class="p">,</span> <span class="n">flags</span><span class="o">=</span><span class="n">LOAD_NO_HINTING</span><span class="p">)</span>
<span class="n">glyph_map_new</span><span class="p">[</span><span class="n">char_id</span><span class="p">]</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_path</span><span class="p">()</span>
<span class="n">xpositions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">ox</span><span class="p">)</span>
<span class="n">ypositions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">oy</span><span class="p">)</span>
<span class="n">glyph_ids</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">char_id</span><span class="p">)</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">fontsize</span> <span class="o">/</span> <span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span>
<span class="n">sizes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">size</span><span class="p">)</span>
<span class="n">myrects</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">ox</span><span class="p">,</span> <span class="n">oy</span><span class="p">,</span> <span class="n">w</span><span class="p">,</span> <span class="n">h</span> <span class="ow">in</span> <span class="n">rects</span><span class="p">:</span>
<span class="n">vert1</span> <span class="o">=</span> <span class="p">[(</span><span class="n">ox</span><span class="p">,</span> <span class="n">oy</span><span class="p">),</span> <span class="p">(</span><span class="n">ox</span><span class="p">,</span> <span class="n">oy</span> <span class="o">+</span> <span class="n">h</span><span class="p">),</span> <span class="p">(</span><span class="n">ox</span> <span class="o">+</span> <span class="n">w</span><span class="p">,</span> <span class="n">oy</span> <span class="o">+</span> <span class="n">h</span><span class="p">),</span>
<span class="p">(</span><span class="n">ox</span> <span class="o">+</span> <span class="n">w</span><span class="p">,</span> <span class="n">oy</span><span class="p">),</span> <span class="p">(</span><span class="n">ox</span><span class="p">,</span> <span class="n">oy</span><span class="p">),</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)]</span>
<span class="n">code1</span> <span class="o">=</span> <span class="p">[</span><span class="n">Path</span><span class="o">.</span><span class="n">MOVETO</span><span class="p">,</span>
<span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">,</span> <span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">,</span> <span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">,</span> <span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">,</span>
<span class="n">Path</span><span class="o">.</span><span class="n">CLOSEPOLY</span><span class="p">]</span>
<span class="n">myrects</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">vert1</span><span class="p">,</span> <span class="n">code1</span><span class="p">))</span>
<span class="k">return</span> <span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="nb">zip</span><span class="p">(</span><span class="n">glyph_ids</span><span class="p">,</span> <span class="n">xpositions</span><span class="p">,</span> <span class="n">ypositions</span><span class="p">,</span> <span class="n">sizes</span><span class="p">)),</span>
<span class="n">glyph_map_new</span><span class="p">,</span> <span class="n">myrects</span><span class="p">)</span></div>
<div class="viewcode-block" id="TextToPath.get_texmanager"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextToPath.get_texmanager">[docs]</a> <span class="k">def</span> <span class="nf">get_texmanager</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Return the cached `~.texmanager.TexManager` instance."""</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_texmanager</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">matplotlib.texmanager</span> <span class="k">import</span> <span class="n">TexManager</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_texmanager</span> <span class="o">=</span> <span class="n">TexManager</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_texmanager</span></div>
<div class="viewcode-block" id="TextToPath.get_glyphs_tex"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextToPath.get_glyphs_tex">[docs]</a> <span class="k">def</span> <span class="nf">get_glyphs_tex</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prop</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">glyph_map</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">return_new_glyphs_only</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="sd">"""Convert the string *s* to vertices and codes using usetex mode."""</span>
<span class="c1"># Mostly borrowed from pdf backend.</span>
<span class="n">dvifile</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_texmanager</span><span class="p">()</span><span class="o">.</span><span class="n">make_dvi</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">)</span>
<span class="k">with</span> <span class="n">dviread</span><span class="o">.</span><span class="n">Dvi</span><span class="p">(</span><span class="n">dvifile</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">DPI</span><span class="p">)</span> <span class="k">as</span> <span class="n">dvi</span><span class="p">:</span>
<span class="n">page</span><span class="p">,</span> <span class="o">=</span> <span class="n">dvi</span>
<span class="k">if</span> <span class="n">glyph_map</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">glyph_map</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="k">if</span> <span class="n">return_new_glyphs_only</span><span class="p">:</span>
<span class="n">glyph_map_new</span> <span class="o">=</span> <span class="n">OrderedDict</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">glyph_map_new</span> <span class="o">=</span> <span class="n">glyph_map</span>
<span class="n">glyph_ids</span><span class="p">,</span> <span class="n">xpositions</span><span class="p">,</span> <span class="n">ypositions</span><span class="p">,</span> <span class="n">sizes</span> <span class="o">=</span> <span class="p">[],</span> <span class="p">[],</span> <span class="p">[],</span> <span class="p">[]</span>
<span class="c1"># Gather font information and do some setup for combining</span>
<span class="c1"># characters into strings.</span>
<span class="k">for</span> <span class="n">x1</span><span class="p">,</span> <span class="n">y1</span><span class="p">,</span> <span class="n">dvifont</span><span class="p">,</span> <span class="n">glyph</span><span class="p">,</span> <span class="n">width</span> <span class="ow">in</span> <span class="n">page</span><span class="o">.</span><span class="n">text</span><span class="p">:</span>
<span class="n">font</span><span class="p">,</span> <span class="n">enc</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_ps_font_and_encoding</span><span class="p">(</span><span class="n">dvifont</span><span class="o">.</span><span class="n">texname</span><span class="p">)</span>
<span class="n">char_id</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_char_id_ps</span><span class="p">(</span><span class="n">font</span><span class="p">,</span> <span class="n">glyph</span><span class="p">)</span>
<span class="k">if</span> <span class="n">char_id</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">glyph_map</span><span class="p">:</span>
<span class="n">font</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="n">font</span><span class="o">.</span><span class="n">set_size</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">DPI</span><span class="p">)</span>
<span class="c1"># See comments in _get_ps_font_and_encoding.</span>
<span class="k">if</span> <span class="n">enc</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">index</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_name_index</span><span class="p">(</span><span class="n">enc</span><span class="p">[</span><span class="n">glyph</span><span class="p">])</span>
<span class="n">font</span><span class="o">.</span><span class="n">load_glyph</span><span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="n">flags</span><span class="o">=</span><span class="n">LOAD_TARGET_LIGHT</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">font</span><span class="o">.</span><span class="n">load_char</span><span class="p">(</span><span class="n">glyph</span><span class="p">,</span> <span class="n">flags</span><span class="o">=</span><span class="n">LOAD_TARGET_LIGHT</span><span class="p">)</span>
<span class="n">glyph_map_new</span><span class="p">[</span><span class="n">char_id</span><span class="p">]</span> <span class="o">=</span> <span class="n">font</span><span class="o">.</span><span class="n">get_path</span><span class="p">()</span>
<span class="n">glyph_ids</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">char_id</span><span class="p">)</span>
<span class="n">xpositions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">x1</span><span class="p">)</span>
<span class="n">ypositions</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">y1</span><span class="p">)</span>
<span class="n">sizes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">dvifont</span><span class="o">.</span><span class="n">size</span> <span class="o">/</span> <span class="bp">self</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">)</span>
<span class="n">myrects</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">ox</span><span class="p">,</span> <span class="n">oy</span><span class="p">,</span> <span class="n">h</span><span class="p">,</span> <span class="n">w</span> <span class="ow">in</span> <span class="n">page</span><span class="o">.</span><span class="n">boxes</span><span class="p">:</span>
<span class="n">vert1</span> <span class="o">=</span> <span class="p">[(</span><span class="n">ox</span><span class="p">,</span> <span class="n">oy</span><span class="p">),</span> <span class="p">(</span><span class="n">ox</span> <span class="o">+</span> <span class="n">w</span><span class="p">,</span> <span class="n">oy</span><span class="p">),</span> <span class="p">(</span><span class="n">ox</span> <span class="o">+</span> <span class="n">w</span><span class="p">,</span> <span class="n">oy</span> <span class="o">+</span> <span class="n">h</span><span class="p">),</span>
<span class="p">(</span><span class="n">ox</span><span class="p">,</span> <span class="n">oy</span> <span class="o">+</span> <span class="n">h</span><span class="p">),</span> <span class="p">(</span><span class="n">ox</span><span class="p">,</span> <span class="n">oy</span><span class="p">),</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)]</span>
<span class="n">code1</span> <span class="o">=</span> <span class="p">[</span><span class="n">Path</span><span class="o">.</span><span class="n">MOVETO</span><span class="p">,</span>
<span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">,</span> <span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">,</span> <span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">,</span> <span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">,</span>
<span class="n">Path</span><span class="o">.</span><span class="n">CLOSEPOLY</span><span class="p">]</span>
<span class="n">myrects</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">vert1</span><span class="p">,</span> <span class="n">code1</span><span class="p">))</span>
<span class="k">return</span> <span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="nb">zip</span><span class="p">(</span><span class="n">glyph_ids</span><span class="p">,</span> <span class="n">xpositions</span><span class="p">,</span> <span class="n">ypositions</span><span class="p">,</span> <span class="n">sizes</span><span class="p">)),</span>
<span class="n">glyph_map_new</span><span class="p">,</span> <span class="n">myrects</span><span class="p">)</span></div>
<span class="nd">@staticmethod</span>
<span class="nd">@functools</span><span class="o">.</span><span class="n">lru_cache</span><span class="p">(</span><span class="mi">50</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_get_ps_font_and_encoding</span><span class="p">(</span><span class="n">texname</span><span class="p">):</span>
<span class="n">tex_font_map</span> <span class="o">=</span> <span class="n">dviread</span><span class="o">.</span><span class="n">PsfontsMap</span><span class="p">(</span><span class="n">dviread</span><span class="o">.</span><span class="n">find_tex_file</span><span class="p">(</span><span class="s1">'pdftex.map'</span><span class="p">))</span>
<span class="n">font_bunch</span> <span class="o">=</span> <span class="n">tex_font_map</span><span class="p">[</span><span class="n">texname</span><span class="p">]</span>
<span class="k">if</span> <span class="n">font_bunch</span><span class="o">.</span><span class="n">filename</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
<span class="n">f</span><span class="s2">"No usable font file found for </span><span class="si">{font_bunch.psname}</span><span class="s2"> "</span>
<span class="n">f</span><span class="s2">"(</span><span class="si">{texname}</span><span class="s2">). The font may lack a Type-1 version."</span><span class="p">)</span>
<span class="n">font</span> <span class="o">=</span> <span class="n">get_font</span><span class="p">(</span><span class="n">font_bunch</span><span class="o">.</span><span class="n">filename</span><span class="p">)</span>
<span class="k">if</span> <span class="n">font_bunch</span><span class="o">.</span><span class="n">encoding</span><span class="p">:</span>
<span class="c1"># If psfonts.map specifies an encoding, use it: it gives us a</span>
<span class="c1"># mapping of glyph indices to Adobe glyph names; use it to convert</span>
<span class="c1"># dvi indices to glyph names and use the FreeType-synthesized</span>
<span class="c1"># unicode charmap to convert glyph names to glyph indices (with</span>
<span class="c1"># FT_Get_Name_Index/get_name_index), and load the glyph using</span>
<span class="c1"># FT_Load_Glyph/load_glyph. (That charmap has a coverage at least</span>
<span class="c1"># as good as, and possibly better than, the native charmaps.)</span>
<span class="n">enc</span> <span class="o">=</span> <span class="n">dviread</span><span class="o">.</span><span class="n">_parse_enc</span><span class="p">(</span><span class="n">font_bunch</span><span class="o">.</span><span class="n">encoding</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># If psfonts.map specifies no encoding, the indices directly</span>
<span class="c1"># map to the font's "native" charmap; so don't use the</span>
<span class="c1"># FreeType-synthesized charmap but the native ones (we can't</span>
<span class="c1"># directly identify it but it's typically an Adobe charmap), and</span>
<span class="c1"># directly load the dvi glyph indices using FT_Load_Char/load_char.</span>
<span class="k">for</span> <span class="n">charmap_name</span><span class="p">,</span> <span class="n">charmap_code</span> <span class="ow">in</span> <span class="p">[</span>
<span class="p">(</span><span class="s2">"ADOBE_CUSTOM"</span><span class="p">,</span> <span class="mi">1094992451</span><span class="p">),</span>
<span class="p">(</span><span class="s2">"ADOBE_STANDARD"</span><span class="p">,</span> <span class="mi">1094995778</span><span class="p">),</span>
<span class="p">]:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">font</span><span class="o">.</span><span class="n">select_charmap</span><span class="p">(</span><span class="n">charmap_code</span><span class="p">)</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">ValueError</span><span class="p">,</span> <span class="ne">RuntimeError</span><span class="p">):</span>
<span class="k">pass</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">break</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">charmap_name</span> <span class="o">=</span> <span class="s2">""</span>
<span class="n">_log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s2">"No supported encoding in font (</span><span class="si">%s</span><span class="s2">)."</span><span class="p">,</span>
<span class="n">font_bunch</span><span class="o">.</span><span class="n">filename</span><span class="p">)</span>
<span class="n">enc</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">return</span> <span class="n">font</span><span class="p">,</span> <span class="n">enc</span></div>
<span class="n">text_to_path</span> <span class="o">=</span> <span class="n">TextToPath</span><span class="p">()</span>
<div class="viewcode-block" id="TextPath"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextPath">[docs]</a><span class="k">class</span> <span class="nc">TextPath</span><span class="p">(</span><span class="n">Path</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Create a path from the text.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">xy</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">size</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">prop</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">_interpolation_steps</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">usetex</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="sa">r</span><span class="sd">"""</span>
<span class="sd"> Create a path from the text. Note that it simply is a path,</span>
<span class="sd"> not an artist. You need to use the `~.PathPatch` (or other artists)</span>
<span class="sd"> to draw this path onto the canvas.</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> xy : tuple or array of two float values</span>
<span class="sd"> Position of the text. For no offset, use ``xy=(0, 0)``.</span>
<span class="sd"> s : str</span>
<span class="sd"> The text to convert to a path.</span>
<span class="sd"> size : float, optional</span>
<span class="sd"> Font size in points. Defaults to the size specified via the font</span>
<span class="sd"> properties *prop*.</span>
<span class="sd"> prop : `matplotlib.font_manager.FontProperties`, optional</span>
<span class="sd"> Font property. If not provided, will use a default</span>
<span class="sd"> ``FontProperties`` with parameters from the</span>
<span class="sd"> :ref:`rcParams <matplotlib-rcparams>`.</span>
<span class="sd"> _interpolation_steps : integer, optional</span>
<span class="sd"> (Currently ignored)</span>
<span class="sd"> usetex : bool, optional</span>
<span class="sd"> Whether to use tex rendering. Defaults to ``False``.</span>
<span class="sd"> Examples</span>
<span class="sd"> --------</span>
<span class="sd"> The following creates a path from the string "ABC" with Helvetica</span>
<span class="sd"> font face; and another path from the latex fraction 1/2::</span>
<span class="sd"> from matplotlib.textpath import TextPath</span>
<span class="sd"> from matplotlib.font_manager import FontProperties</span>
<span class="sd"> fp = FontProperties(family="Helvetica", style="italic")</span>
<span class="sd"> path1 = TextPath((12,12), "ABC", size=12, prop=fp)</span>
<span class="sd"> path2 = TextPath((0,0), r"$\frac{1}{2}$", size=12, usetex=True)</span>
<span class="sd"> Also see :doc:`/gallery/text_labels_and_annotations/demo_text_path`.</span>
<span class="sd"> """</span>
<span class="c1"># Circular import.</span>
<span class="kn">from</span> <span class="nn">matplotlib.text</span> <span class="k">import</span> <span class="n">Text</span>
<span class="k">if</span> <span class="n">args</span> <span class="ow">or</span> <span class="n">kwargs</span><span class="p">:</span>
<span class="n">cbook</span><span class="o">.</span><span class="n">warn_deprecated</span><span class="p">(</span>
<span class="s2">"3.1"</span><span class="p">,</span> <span class="n">message</span><span class="o">=</span><span class="s2">"Additional arguments to TextPath used to be "</span>
<span class="s2">"ignored, but will trigger a TypeError </span><span class="si">%(removal)s</span><span class="s2">."</span><span class="p">)</span>
<span class="k">if</span> <span class="n">prop</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">prop</span> <span class="o">=</span> <span class="n">FontProperties</span><span class="p">()</span>
<span class="k">if</span> <span class="n">size</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">prop</span><span class="o">.</span><span class="n">get_size_in_points</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_xy</span> <span class="o">=</span> <span class="n">xy</span>
<span class="bp">self</span><span class="o">.</span><span class="n">set_size</span><span class="p">(</span><span class="n">size</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cached_vertices</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">s</span><span class="p">,</span> <span class="n">ismath</span> <span class="o">=</span> <span class="n">Text</span><span class="p">(</span><span class="n">usetex</span><span class="o">=</span><span class="n">usetex</span><span class="p">)</span><span class="o">.</span><span class="n">_preprocess_math</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_vertices</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_codes</span> <span class="o">=</span> <span class="n">text_to_path</span><span class="o">.</span><span class="n">get_text_path</span><span class="p">(</span>
<span class="n">prop</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">ismath</span><span class="o">=</span><span class="n">ismath</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_should_simplify</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_simplify_threshold</span> <span class="o">=</span> <span class="n">rcParams</span><span class="p">[</span><span class="s1">'path.simplify_threshold'</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_interpolation_steps</span> <span class="o">=</span> <span class="n">_interpolation_steps</span>
<div class="viewcode-block" id="TextPath.set_size"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextPath.set_size">[docs]</a> <span class="k">def</span> <span class="nf">set_size</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">size</span><span class="p">):</span>
<span class="sd">"""Set the text size."""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">=</span> <span class="n">size</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_invalid</span> <span class="o">=</span> <span class="kc">True</span></div>
<div class="viewcode-block" id="TextPath.get_size"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextPath.get_size">[docs]</a> <span class="k">def</span> <span class="nf">get_size</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Get the text size."""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span></div>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">vertices</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Return the cached path after updating it if necessary.</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_revalidate_path</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cached_vertices</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">codes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Return the codes</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_codes</span>
<span class="k">def</span> <span class="nf">_revalidate_path</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Update the path if necessary.</span>
<span class="sd"> The path for the text is initially create with the font size of</span>
<span class="sd"> `~.FONT_SCALE`, and this path is rescaled to other size when necessary.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_invalid</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cached_vertices</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">tr</span> <span class="o">=</span> <span class="n">Affine2D</span><span class="p">()</span><span class="o">.</span><span class="n">scale</span><span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">/</span> <span class="n">text_to_path</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">/</span> <span class="n">text_to_path</span><span class="o">.</span><span class="n">FONT_SCALE</span><span class="p">)</span><span class="o">.</span><span class="n">translate</span><span class="p">(</span><span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">_xy</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cached_vertices</span> <span class="o">=</span> <span class="n">tr</span><span class="o">.</span><span class="n">transform</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_vertices</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_invalid</span> <span class="o">=</span> <span class="kc">False</span>
<div class="viewcode-block" id="TextPath.is_math_text"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextPath.is_math_text">[docs]</a> <span class="nd">@cbook</span><span class="o">.</span><span class="n">deprecated</span><span class="p">(</span><span class="s2">"3.1"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">is_math_text</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">s</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Returns True if the given string *s* contains any mathtext.</span>
<span class="sd"> """</span>
<span class="c1"># copied from Text.is_math_text -JJL</span>
<span class="c1"># Did we find an even number of non-escaped dollar signs?</span>
<span class="c1"># If so, treat is as math text.</span>
<span class="n">dollar_count</span> <span class="o">=</span> <span class="n">s</span><span class="o">.</span><span class="n">count</span><span class="p">(</span><span class="sa">r</span><span class="s1">'$'</span><span class="p">)</span> <span class="o">-</span> <span class="n">s</span><span class="o">.</span><span class="n">count</span><span class="p">(</span><span class="sa">r</span><span class="s1">'\$'</span><span class="p">)</span>
<span class="n">even_dollars</span> <span class="o">=</span> <span class="p">(</span><span class="n">dollar_count</span> <span class="o">></span> <span class="mi">0</span> <span class="ow">and</span> <span class="n">dollar_count</span> <span class="o">%</span> <span class="mi">2</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">if</span> <span class="n">rcParams</span><span class="p">[</span><span class="s1">'text.usetex'</span><span class="p">]:</span>
<span class="k">return</span> <span class="n">s</span><span class="p">,</span> <span class="s1">'TeX'</span>
<span class="k">if</span> <span class="n">even_dollars</span><span class="p">:</span>
<span class="k">return</span> <span class="n">s</span><span class="p">,</span> <span class="kc">True</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="n">s</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="sa">r</span><span class="s1">'\$'</span><span class="p">,</span> <span class="s1">'$'</span><span class="p">),</span> <span class="kc">False</span></div>
<div class="viewcode-block" id="TextPath.text_get_vertices_codes"><a class="viewcode-back" href="../../api/textpath_api.html#matplotlib.textpath.TextPath.text_get_vertices_codes">[docs]</a> <span class="nd">@cbook</span><span class="o">.</span><span class="n">deprecated</span><span class="p">(</span><span class="s2">"3.1"</span><span class="p">,</span> <span class="n">alternative</span><span class="o">=</span><span class="s2">"TextPath"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">text_get_vertices_codes</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prop</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">usetex</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Convert string *s* to a (vertices, codes) pair using font property</span>
<span class="sd"> *prop*.</span>
<span class="sd"> """</span>
<span class="c1"># Mostly copied from backend_svg.py.</span>
<span class="k">if</span> <span class="n">usetex</span><span class="p">:</span>
<span class="k">return</span> <span class="n">text_to_path</span><span class="o">.</span><span class="n">get_text_path</span><span class="p">(</span><span class="n">prop</span><span class="p">,</span> <span class="n">s</span><span class="p">,</span> <span class="n">usetex</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">clean_line</span><span class="p">,</span> <span class="n">ismath</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_math_text</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
<span class="k">return</span> <span class="n">text_to_path</span><span class="o">.</span><span class="n">get_text_path</span><span class="p">(</span><span class="n">prop</span><span class="p">,</span> <span class="n">clean_line</span><span class="p">,</span> <span class="n">ismath</span><span class="o">=</span><span class="n">ismath</span><span class="p">)</span></div></div>
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