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<li><a class="reference internal" href="#a-cairo-backend-for-matplotlib">A Cairo backend for matplotlib</a></li>
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<div class="section" id="module-matplotlib.backends.backend_cairo">
<span id="matplotlib-backends-backend-cairo"></span><h1><a class="reference internal" href="#module-matplotlib.backends.backend_cairo" title="matplotlib.backends.backend_cairo"><code class="xref py py-mod docutils literal notranslate"><span class="pre">matplotlib.backends.backend_cairo</span></code></a><a class="headerlink" href="#module-matplotlib.backends.backend_cairo" title="Permalink to this headline">¶</a></h1>
<div class="section" id="a-cairo-backend-for-matplotlib">
<h2>A Cairo backend for matplotlib<a class="headerlink" href="#a-cairo-backend-for-matplotlib" title="Permalink to this headline">¶</a></h2>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Author:</th><td class="field-body">Steve Chaplin and others</td>
</tr>
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<p>This backend depends on cairocffi or pycairo.</p>
<dl class="class">
<dt id="matplotlib.backends.backend_cairo.ArrayWrapper">
<em class="property">class </em><code class="descclassname">matplotlib.backends.backend_cairo.</code><code class="descname">ArrayWrapper</code><span class="sig-paren">(</span><em>**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#ArrayWrapper"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.ArrayWrapper" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.7)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
<div class="deprecated">
<p><span class="versionmodified">Deprecated since version 3.0: </span>The ArrayWrapper class was deprecated in Matplotlib 3.0 and will be removed in 3.2.</p>
</div>
<dl class="docutils">
<dt>Thin wrapper around numpy ndarray to expose the interface</dt>
<dd>expected by cairocffi. Basically replicates the
array.array interface.</dd>
</dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.ArrayWrapper.buffer_info">
<code class="descname">buffer_info</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#ArrayWrapper.buffer_info"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.ArrayWrapper.buffer_info" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="attribute">
<dt id="matplotlib.backends.backend_cairo.FigureCanvas">
<code class="descclassname">matplotlib.backends.backend_cairo.</code><code class="descname">FigureCanvas</code><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvas" title="Permalink to this definition">¶</a></dt>
<dd><p>alias of <a class="reference internal" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo" title="matplotlib.backends.backend_cairo.FigureCanvasCairo"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.backends.backend_cairo.FigureCanvasCairo</span></code></a></p>
</dd></dl>
<dl class="class">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo">
<em class="property">class </em><code class="descclassname">matplotlib.backends.backend_cairo.</code><code class="descname">FigureCanvasCairo</code><span class="sig-paren">(</span><em>figure</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#FigureCanvasCairo"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.FigureCanvasBase" title="matplotlib.backend_bases.FigureCanvasBase"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.backend_bases.FigureCanvasBase</span></code></a></p>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo.print_pdf">
<code class="descname">print_pdf</code><span class="sig-paren">(</span><em>fobj</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#FigureCanvasCairo.print_pdf"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo.print_pdf" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo.print_png">
<code class="descname">print_png</code><span class="sig-paren">(</span><em>fobj</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#FigureCanvasCairo.print_png"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo.print_png" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo.print_ps">
<code class="descname">print_ps</code><span class="sig-paren">(</span><em>fobj</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#FigureCanvasCairo.print_ps"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo.print_ps" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo.print_raw">
<code class="descname">print_raw</code><span class="sig-paren">(</span><em>fobj</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo.print_raw" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo.print_rgba">
<code class="descname">print_rgba</code><span class="sig-paren">(</span><em>fobj</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#FigureCanvasCairo.print_rgba"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo.print_rgba" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo.print_svg">
<code class="descname">print_svg</code><span class="sig-paren">(</span><em>fobj</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#FigureCanvasCairo.print_svg"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo.print_svg" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo.print_svgz">
<code class="descname">print_svgz</code><span class="sig-paren">(</span><em>fobj</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#FigureCanvasCairo.print_svgz"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo.print_svgz" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="attribute">
<dt id="matplotlib.backends.backend_cairo.FigureCanvasCairo.supports_blit">
<code class="descname">supports_blit</code><em class="property"> = False</em><a class="headerlink" href="#matplotlib.backends.backend_cairo.FigureCanvasCairo.supports_blit" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo">
<em class="property">class </em><code class="descclassname">matplotlib.backends.backend_cairo.</code><code class="descname">GraphicsContextCairo</code><span class="sig-paren">(</span><em>renderer</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.GraphicsContextBase" title="matplotlib.backend_bases.GraphicsContextBase"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.backend_bases.GraphicsContextBase</span></code></a></p>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.get_rgb">
<code class="descname">get_rgb</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.get_rgb"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.get_rgb" title="Permalink to this definition">¶</a></dt>
<dd><p>returns a tuple of three or four floats from 0-1.</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.restore">
<code class="descname">restore</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.restore"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.restore" title="Permalink to this definition">¶</a></dt>
<dd><p>Restore the graphics context from the stack - needed only
for backends that save graphics contexts on a stack</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.set_alpha">
<code class="descname">set_alpha</code><span class="sig-paren">(</span><em>alpha</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.set_alpha"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.set_alpha" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the alpha value used for blending - not supported on all backends.
If <code class="docutils literal notranslate"><span class="pre">alpha=None</span></code> (the default), the alpha components of the
foreground and fill colors will be used to set their respective
transparencies (where applicable); otherwise, <code class="docutils literal notranslate"><span class="pre">alpha</span></code> will override
them.</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.set_capstyle">
<code class="descname">set_capstyle</code><span class="sig-paren">(</span><em>cs</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.set_capstyle"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.set_capstyle" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the capstyle as a string in ('butt', 'round', 'projecting')</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.set_clip_path">
<code class="descname">set_clip_path</code><span class="sig-paren">(</span><em>path</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.set_clip_path"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.set_clip_path" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the clip path and transformation. Path should be a
<a class="reference internal" href="transformations.html#matplotlib.transforms.TransformedPath" title="matplotlib.transforms.TransformedPath"><code class="xref py py-class docutils literal notranslate"><span class="pre">TransformedPath</span></code></a> instance.</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.set_clip_rectangle">
<code class="descname">set_clip_rectangle</code><span class="sig-paren">(</span><em>rectangle</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.set_clip_rectangle"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.set_clip_rectangle" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the clip rectangle with sequence (left, bottom, width, height)</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.set_dashes">
<code class="descname">set_dashes</code><span class="sig-paren">(</span><em>offset</em>, <em>dashes</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.set_dashes"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.set_dashes" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the dash style for the gc.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>dash_offset</strong> <span class="classifier-delimiter">:</span> <span class="classifier">float</span></dt>
<dd><p class="first last">is the offset (usually 0).</p>
</dd>
<dt><strong>dash_list</strong> <span class="classifier-delimiter">:</span> <span class="classifier">array_like</span></dt>
<dd><p class="first last">specifies the on-off sequence as points.
<code class="docutils literal notranslate"><span class="pre">(None,</span> <span class="pre">None)</span></code> specifies a solid line</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.set_foreground">
<code class="descname">set_foreground</code><span class="sig-paren">(</span><em>fg</em>, <em>isRGBA=None</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.set_foreground"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.set_foreground" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the foreground color. fg can be a MATLAB format string, a
html hex color string, an rgb or rgba unit tuple, or a float between 0
and 1. In the latter case, grayscale is used.</p>
<p>If you know fg is rgba, set <code class="docutils literal notranslate"><span class="pre">isRGBA=True</span></code> for efficiency.</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.set_joinstyle">
<code class="descname">set_joinstyle</code><span class="sig-paren">(</span><em>js</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.set_joinstyle"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.set_joinstyle" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the join style to be one of ('miter', 'round', 'bevel')</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.GraphicsContextCairo.set_linewidth">
<code class="descname">set_linewidth</code><span class="sig-paren">(</span><em>w</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#GraphicsContextCairo.set_linewidth"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.GraphicsContextCairo.set_linewidth" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the linewidth in points</p>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="matplotlib.backends.backend_cairo.RendererCairo">
<em class="property">class </em><code class="descclassname">matplotlib.backends.backend_cairo.</code><code class="descname">RendererCairo</code><span class="sig-paren">(</span><em>dpi</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.RendererBase" title="matplotlib.backend_bases.RendererBase"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.backend_bases.RendererBase</span></code></a></p>
<dl class="staticmethod">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.convert_path">
<em class="property">static </em><code class="descname">convert_path</code><span class="sig-paren">(</span><em>ctx</em>, <em>path</em>, <em>transform</em>, <em>clip=None</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.convert_path"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.convert_path" title="Permalink to this definition">¶</a></dt>
<dd><div class="deprecated">
<p><span class="versionmodified">Deprecated since version 3.0: </span>The convert_path function was deprecated in Matplotlib 3.0 and will be removed in 3.2.</p>
</div>
<p></p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.draw_image">
<code class="descname">draw_image</code><span class="sig-paren">(</span><em>gc</em>, <em>x</em>, <em>y</em>, <em>im</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.draw_image"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_image" title="Permalink to this definition">¶</a></dt>
<dd><p>Draw an RGBA image.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>gc</strong> <span class="classifier-delimiter">:</span> <span class="classifier"><code class="xref py py-obj docutils literal notranslate"><span class="pre">GraphicsContextBase</span></code></span></dt>
<dd><p class="first last">a graphics context with clipping information.</p>
</dd>
<dt><strong>x</strong> <span class="classifier-delimiter">:</span> <span class="classifier">scalar</span></dt>
<dd><p class="first last">the distance in physical units (i.e., dots or pixels) from the left
hand side of the canvas.</p>
</dd>
<dt><strong>y</strong> <span class="classifier-delimiter">:</span> <span class="classifier">scalar</span></dt>
<dd><p class="first last">the distance in physical units (i.e., dots or pixels) from the
bottom side of the canvas.</p>
</dd>
<dt><strong>im</strong> <span class="classifier-delimiter">:</span> <span class="classifier">array_like, shape=(N, M, 4), dtype=np.uint8</span></dt>
<dd><p class="first last">An array of RGBA pixels.</p>
</dd>
<dt><strong>transform</strong> <span class="classifier-delimiter">:</span> <span class="classifier"><a class="reference internal" href="transformations.html#matplotlib.transforms.Affine2DBase" title="matplotlib.transforms.Affine2DBase"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.transforms.Affine2DBase</span></code></a></span></dt>
<dd><p class="first last">If and only if the concrete backend is written such that
<code class="xref py py-meth docutils literal notranslate"><span class="pre">option_scale_image()</span></code> returns <code class="docutils literal notranslate"><span class="pre">True</span></code>, an affine
transformation <em>may</em> be passed to <a class="reference internal" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_image" title="matplotlib.backends.backend_cairo.RendererCairo.draw_image"><code class="xref py py-meth docutils literal notranslate"><span class="pre">draw_image()</span></code></a>. It takes the
form of a <a class="reference internal" href="transformations.html#matplotlib.transforms.Affine2DBase" title="matplotlib.transforms.Affine2DBase"><code class="xref py py-class docutils literal notranslate"><span class="pre">Affine2DBase</span></code></a> instance.
The translation vector of the transformation is given in physical
units (i.e., dots or pixels). Note that the transformation does not
override <code class="xref py py-obj docutils literal notranslate"><span class="pre">x</span></code> and <code class="xref py py-obj docutils literal notranslate"><span class="pre">y</span></code>, and has to be applied <em>before</em> translating
the result by <code class="xref py py-obj docutils literal notranslate"><span class="pre">x</span></code> and <code class="xref py py-obj docutils literal notranslate"><span class="pre">y</span></code> (this can be accomplished by adding <code class="xref py py-obj docutils literal notranslate"><span class="pre">x</span></code>
and <code class="xref py py-obj docutils literal notranslate"><span class="pre">y</span></code> to the translation vector defined by <code class="xref py py-obj docutils literal notranslate"><span class="pre">transform</span></code>).</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.draw_markers">
<code class="descname">draw_markers</code><span class="sig-paren">(</span><em>gc</em>, <em>marker_path</em>, <em>marker_trans</em>, <em>path</em>, <em>transform</em>, <em>rgbFace=None</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.draw_markers"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_markers" title="Permalink to this definition">¶</a></dt>
<dd><p>Draws a marker at each of the vertices in path. This includes
all vertices, including control points on curves. To avoid
that behavior, those vertices should be removed before calling
this function.</p>
<p>This provides a fallback implementation of draw_markers that
makes multiple calls to <a class="reference internal" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_path" title="matplotlib.backends.backend_cairo.RendererCairo.draw_path"><code class="xref py py-meth docutils literal notranslate"><span class="pre">draw_path()</span></code></a>. Some backends may
want to override this method in order to draw the marker only
once and reuse it multiple times.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>gc</strong> <span class="classifier-delimiter">:</span> <span class="classifier"><code class="xref py py-obj docutils literal notranslate"><span class="pre">GraphicsContextBase</span></code></span></dt>
<dd><p class="first last">The graphics context</p>
</dd>
<dt><strong>marker_trans</strong> <span class="classifier-delimiter">:</span> <span class="classifier"><a class="reference internal" href="transformations.html#matplotlib.transforms.Transform" title="matplotlib.transforms.Transform"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.transforms.Transform</span></code></a></span></dt>
<dd><p class="first last">An affine transform applied to the marker.</p>
</dd>
<dt><strong>trans</strong> <span class="classifier-delimiter">:</span> <span class="classifier"><a class="reference internal" href="transformations.html#matplotlib.transforms.Transform" title="matplotlib.transforms.Transform"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.transforms.Transform</span></code></a></span></dt>
<dd><p class="first last">An affine transform applied to the path.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.draw_path">
<code class="descname">draw_path</code><span class="sig-paren">(</span><em>gc</em>, <em>path</em>, <em>transform</em>, <em>rgbFace=None</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.draw_path"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_path" title="Permalink to this definition">¶</a></dt>
<dd><p>Draws a <a class="reference internal" href="path_api.html#matplotlib.path.Path" title="matplotlib.path.Path"><code class="xref py py-class docutils literal notranslate"><span class="pre">Path</span></code></a> instance using the
given affine transform.</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.draw_path_collection">
<code class="descname">draw_path_collection</code><span class="sig-paren">(</span><em>gc</em>, <em>master_transform</em>, <em>paths</em>, <em>all_transforms</em>, <em>offsets</em>, <em>offsetTrans</em>, <em>facecolors</em>, <em>edgecolors</em>, <em>linewidths</em>, <em>linestyles</em>, <em>antialiaseds</em>, <em>urls</em>, <em>offset_position</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.draw_path_collection"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_path_collection" title="Permalink to this definition">¶</a></dt>
<dd><p>Draws a collection of paths selecting drawing properties from
the lists <em>facecolors</em>, <em>edgecolors</em>, <em>linewidths</em>,
<em>linestyles</em> and <em>antialiaseds</em>. <em>offsets</em> is a list of
offsets to apply to each of the paths. The offsets in
<em>offsets</em> are first transformed by <em>offsetTrans</em> before being
applied. <em>offset_position</em> may be either "screen" or "data"
depending on the space that the offsets are in.</p>
<p>This provides a fallback implementation of
<a class="reference internal" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_path_collection" title="matplotlib.backends.backend_cairo.RendererCairo.draw_path_collection"><code class="xref py py-meth docutils literal notranslate"><span class="pre">draw_path_collection()</span></code></a> that makes multiple calls to
<a class="reference internal" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_path" title="matplotlib.backends.backend_cairo.RendererCairo.draw_path"><code class="xref py py-meth docutils literal notranslate"><span class="pre">draw_path()</span></code></a>. Some backends may want to override this in
order to render each set of path data only once, and then
reference that path multiple times with the different offsets,
colors, styles etc. The generator methods
<code class="xref py py-meth docutils literal notranslate"><span class="pre">_iter_collection_raw_paths()</span></code> and
<code class="xref py py-meth docutils literal notranslate"><span class="pre">_iter_collection()</span></code> are provided to help with (and
standardize) the implementation across backends. It is highly
recommended to use those generators, so that changes to the
behavior of <a class="reference internal" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_path_collection" title="matplotlib.backends.backend_cairo.RendererCairo.draw_path_collection"><code class="xref py py-meth docutils literal notranslate"><span class="pre">draw_path_collection()</span></code></a> can be made globally.</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.draw_text">
<code class="descname">draw_text</code><span class="sig-paren">(</span><em>gc</em>, <em>x</em>, <em>y</em>, <em>s</em>, <em>prop</em>, <em>angle</em>, <em>ismath=False</em>, <em>mtext=None</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.draw_text"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.draw_text" title="Permalink to this definition">¶</a></dt>
<dd><p>Draw the text instance</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>gc</strong> <span class="classifier-delimiter">:</span> <span class="classifier"><code class="xref py py-obj docutils literal notranslate"><span class="pre">GraphicsContextBase</span></code></span></dt>
<dd><p class="first last">the graphics context</p>
</dd>
<dt><strong>x</strong> <span class="classifier-delimiter">:</span> <span class="classifier">scalar</span></dt>
<dd><p class="first last">the x location of the text in display coords</p>
</dd>
<dt><strong>y</strong> <span class="classifier-delimiter">:</span> <span class="classifier">scalar</span></dt>
<dd><p class="first last">the y location of the text baseline in display coords</p>
</dd>
<dt><strong>s</strong> <span class="classifier-delimiter">:</span> <span class="classifier">str</span></dt>
<dd><p class="first last">the text string</p>
</dd>
<dt><strong>prop</strong> <span class="classifier-delimiter">:</span> <span class="classifier"><a class="reference internal" href="font_manager_api.html#matplotlib.font_manager.FontProperties" title="matplotlib.font_manager.FontProperties"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.font_manager.FontProperties</span></code></a></span></dt>
<dd><p class="first last">font properties</p>
</dd>
<dt><strong>angle</strong> <span class="classifier-delimiter">:</span> <span class="classifier">scalar</span></dt>
<dd><p class="first last">the rotation angle in degrees</p>
</dd>
<dt><strong>mtext</strong> <span class="classifier-delimiter">:</span> <span class="classifier"><a class="reference internal" href="text_api.html#matplotlib.text.Text" title="matplotlib.text.Text"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.text.Text</span></code></a></span></dt>
<dd><p class="first last">the original text object to be rendered</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<p class="rubric">Notes</p>
<p><strong>backend implementers note</strong></p>
<p>When you are trying to determine if you have gotten your bounding box
right (which is what enables the text layout/alignment to work
properly), it helps to change the line in text.py:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="mi">0</span><span class="p">:</span> <span class="n">bbox_artist</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">renderer</span><span class="p">)</span>
</pre></div>
</div>
<p>to if 1, and then the actual bounding box will be plotted along with
your text.</p>
</dd></dl>
<dl class="attribute">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.fontangles">
<code class="descname">fontangles</code><em class="property"> = {'italic': <MyCairoCffi name='mock.FONT_SLANT_ITALIC' id='140068958732184'>, 'normal': <MyCairoCffi name='mock.FONT_SLANT_NORMAL' id='140068958752952'>, 'oblique': <MyCairoCffi name='mock.FONT_SLANT_OBLIQUE' id='140068958769560'>}</em><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.fontangles" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="attribute">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.fontweights">
<code class="descname">fontweights</code><em class="property"> = {100: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 200: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 300: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 400: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 500: <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 600: <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>, 700: <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>, 800: <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>, 900: <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>, 'ultralight': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 'light': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 'normal': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 'medium': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 'regular': <MyCairoCffi name='mock.FONT_WEIGHT_NORMAL' id='140068958699024'>, 'semibold': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>, 'bold': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>, 'heavy': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>, 'ultrabold': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>, 'black': <MyCairoCffi name='mock.FONT_WEIGHT_BOLD' id='140068958715576'>}</em><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.fontweights" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.get_canvas_width_height">
<code class="descname">get_canvas_width_height</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.get_canvas_width_height"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.get_canvas_width_height" title="Permalink to this definition">¶</a></dt>
<dd><p>return the canvas width and height in display coords</p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.get_text_width_height_descent">
<code class="descname">get_text_width_height_descent</code><span class="sig-paren">(</span><em>s</em>, <em>prop</em>, <em>ismath</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.get_text_width_height_descent"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.get_text_width_height_descent" title="Permalink to this definition">¶</a></dt>
<dd><p>Get the width, height, and descent (offset from the bottom
to the baseline), in display coords, of the string <em>s</em> with
<a class="reference internal" href="font_manager_api.html#matplotlib.font_manager.FontProperties" title="matplotlib.font_manager.FontProperties"><code class="xref py py-class docutils literal notranslate"><span class="pre">FontProperties</span></code></a> <em>prop</em></p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.new_gc">
<code class="descname">new_gc</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.new_gc"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.new_gc" title="Permalink to this definition">¶</a></dt>
<dd><p>Return an instance of a <code class="xref py py-class docutils literal notranslate"><span class="pre">GraphicsContextBase</span></code></p>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.points_to_pixels">
<code class="descname">points_to_pixels</code><span class="sig-paren">(</span><em>points</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.points_to_pixels"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.points_to_pixels" title="Permalink to this definition">¶</a></dt>
<dd><p>Convert points to display units</p>
<p>You need to override this function (unless your backend
doesn't have a dpi, e.g., postscript or svg). Some imaging
systems assume some value for pixels per inch:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">points</span> <span class="n">to</span> <span class="n">pixels</span> <span class="o">=</span> <span class="n">points</span> <span class="o">*</span> <span class="n">pixels_per_inch</span><span class="o">/</span><span class="mf">72.0</span> <span class="o">*</span> <span class="n">dpi</span><span class="o">/</span><span class="mf">72.0</span>
</pre></div>
</div>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first docutils">
<dt><strong>points</strong> <span class="classifier-delimiter">:</span> <span class="classifier">scalar or array_like</span></dt>
<dd><p class="first last">a float or a numpy array of float</p>
</dd>
</dl>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>Points converted to pixels</strong></dt>
<dd></dd>
</dl>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.set_ctx_from_surface">
<code class="descname">set_ctx_from_surface</code><span class="sig-paren">(</span><em>surface</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.set_ctx_from_surface"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.set_ctx_from_surface" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="matplotlib.backends.backend_cairo.RendererCairo.set_width_height">
<code class="descname">set_width_height</code><span class="sig-paren">(</span><em>width</em>, <em>height</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/backends/backend_cairo.html#RendererCairo.set_width_height"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.backends.backend_cairo.RendererCairo.set_width_height" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
</div>
</div>
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