matplotlib.github.com/3.4.0/gallery/misc/agg_buffer.html at main · matplotlib/matplotlib.github.com · GitHub

History

166 lines (139 loc) · 12.7 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>Agg Buffer — Matplotlib 3.4.0 documentation</title>

title="Search within Matplotlib 3.4.0 documentation"

href="../../_static/opensearch.xml"/>

</head><body>

<div id="unreleased-message"> You are reading an old version of the documentation (v3.4.0). For the latest version see <a href="https://matplotlib.org/stable/gallery/misc/agg_buffer.html">https://matplotlib.org/stable/gallery/misc/agg_buffer.html</a></div>

<!--

</div>

-->

<div style="float: left; position: absolute; width: 496px; bottom: 0; padding-bottom: 24px"><span style="float: right; color: #789; background: white">Version 3.4.0</span></div>

<div id="forkongithub"><a href="https://github.com/matplotlib/matplotlib">Fork me on GitHub</a></div>

</div>

<ul>

<li><a href="../../users/installing.html">Installation</a></li>

<li><a href="../../contents.html">Documentation</a></li>

<li><a href="../index.html">Examples</a></li>

<li><a href="../../tutorials/index.html">Tutorials</a></li>

<li><a href="../../devel/index.html">Contributing</a></li>

</form>

</li>

</ul>

</nav>

<h3>Navigation</h3>

<ul>

<a href="../../genindex.html" title="General Index"

accesskey="I">index</a></li>

<a href="../../py-modindex.html" title="Python Module Index"

>modules</a> |</li>

<li><a href="../../contents.html">contents</a> »</li>

<li class="nav-item nav-item-this"><a href="">Agg Buffer</a></li>

</ul>

</div>

<div id="sidebar-pagesource" role="note" aria-label="source link"

style="margin-top: 1.5em; padding-top: 0.1em; border-top: 1px solid #86989b">

<a href="../../_sources/gallery/misc/agg_buffer.rst.txt"

style="color: #c0c0c0" rel="nofollow">Show Page Source</a>

</div>

<p class="last">Click <a class="reference internal" href="#sphx-glr-download-gallery-misc-agg-buffer-py"><span class="std std-ref">here</span></a> to download the full example code</p>

</div>

<span id="sphx-glr-gallery-misc-agg-buffer-py"></span><h1>Agg Buffer<a class="headerlink" href="#agg-buffer" title="Permalink to this headline">¶</a></h1>

<p>Use backend agg to access the figure canvas as an RGBA buffer, convert it to an

array, and pass it to Pillow for rendering.</p>

<div class="highlight-default notranslate"><div class="highlight"><pre><span></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.backends.backend_agg</span> <span class="kn">import</span> <a href="../../api/backend_agg_api.html#matplotlib.backends.backend_agg.FigureCanvasAgg" title="matplotlib.backends.backend_agg.FigureCanvasAgg" class="sphx-glr-backref-module-matplotlib-backends-backend_agg sphx-glr-backref-type-py-class"><span class="n">FigureCanvasAgg</span></a>

<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>

<a href="../../api/backend_agg_api.html#matplotlib.backends.backend_agg.FigureCanvasAgg" title="matplotlib.backends.backend_agg.FigureCanvasAgg" class="sphx-glr-backref-module-matplotlib-backends-backend_agg sphx-glr-backref-type-py-class sphx-glr-backref-instance"><span class="n">canvas</span></a> <span class="o">=</span> <a href="../../api/_as_gen/matplotlib.pyplot.gcf.html#matplotlib.pyplot.gcf" title="matplotlib.pyplot.gcf" class="sphx-glr-backref-module-matplotlib-pyplot sphx-glr-backref-type-py-function"><span class="n">plt</span><span class="o">.</span><span class="n">gcf</span></a><span class="p">()</span><span class="o">.</span><a href="../../api/backend_agg_api.html#matplotlib.backends.backend_agg.FigureCanvasAgg" title="matplotlib.backends.backend_agg.FigureCanvasAgg" class="sphx-glr-backref-module-matplotlib-backends-backend_agg sphx-glr-backref-type-py-class sphx-glr-backref-instance"><span class="n">canvas</span></a>

<a href="../../api/backend_agg_api.html#matplotlib.backends.backend_agg.FigureCanvasAgg" title="matplotlib.backends.backend_agg.FigureCanvasAgg" class="sphx-glr-backref-module-matplotlib-backends-backend_agg sphx-glr-backref-type-py-class sphx-glr-backref-instance"><span class="n">agg</span></a> <span class="o">=</span> <a href="../../api/backend_bases_api.html#matplotlib.backend_bases.FigureCanvasBase.switch_backends" title="matplotlib.backend_bases.FigureCanvasBase.switch_backends" class="sphx-glr-backref-module-matplotlib-backend_bases sphx-glr-backref-type-py-method"><span class="n">canvas</span><span class="o">.</span><span class="n">switch_backends</span></a><span class="p">(</span><a href="../../api/backend_agg_api.html#matplotlib.backends.backend_agg.FigureCanvasAgg" title="matplotlib.backends.backend_agg.FigureCanvasAgg" class="sphx-glr-backref-module-matplotlib-backends-backend_agg sphx-glr-backref-type-py-class"><span class="n">FigureCanvasAgg</span></a><span class="p">)</span>

<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.ndarray.html#numpy.ndarray" title="numpy.ndarray" class="sphx-glr-backref-module-numpy sphx-glr-backref-type-py-class sphx-glr-backref-instance"><span class="n">X</span></a> <span class="o">=</span> <a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.asarray.html#numpy.asarray" title="numpy.asarray" class="sphx-glr-backref-module-numpy sphx-glr-backref-type-py-function"><span class="n">np</span><span class="o">.</span><span class="n">asarray</span></a><span class="p">(</span><a href="../../api/backend_agg_api.html#matplotlib.backends.backend_agg.FigureCanvasAgg.buffer_rgba" title="matplotlib.backends.backend_agg.FigureCanvasAgg.buffer_rgba" class="sphx-glr-backref-module-matplotlib-backends-backend_agg sphx-glr-backref-type-py-method"><span class="n">agg</span><span class="o">.</span><span class="n">buffer_rgba</span></a><span class="p">())</span>

<span class="kn">from</span> <span class="nn">PIL</span> <span class="kn">import</span> <span class="n">Image</span>

<span class="n">im</span> <span class="o">=</span> <span class="n">Image</span><span class="o">.</span><span class="n">fromarray</span><span class="p">(</span><a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.ndarray.html#numpy.ndarray" title="numpy.ndarray" class="sphx-glr-backref-module-numpy sphx-glr-backref-type-py-class sphx-glr-backref-instance"><span class="n">X</span></a><span class="p">)</span>

<span class="c1"># Uncomment this line to display the image using ImageMagick's `display` tool.</span>

</pre></div>

</div>

<a class="reference download internal" download="" href="../../_downloads/3cc6fec5c2863ce9fad2f17b352c0da5/agg_buffer.py"><code class="xref download docutils literal notranslate"><span class="pre">Download</span> <span class="pre">Python</span> <span class="pre">source</span> <span class="pre">code:</span> <span class="pre">agg_buffer.py</span></code></a></div>

<a class="reference download internal" download="" href="../../_downloads/0b0fe3533b924ef7ae5df1a81f3ac8be/agg_buffer.ipynb"><code class="xref download docutils literal notranslate"><span class="pre">Download</span> <span class="pre">Jupyter</span> <span class="pre">notebook:</span> <span class="pre">agg_buffer.ipynb</span></code></a></div>

</div>

<p class="sphx-glr-signature">Keywords: matplotlib code example, codex, python plot, pyplot

<a class="reference external" href="https://sphinx-gallery.readthedocs.io">Gallery generated by Sphinx-Gallery</a></p>

</div>

</div>

<br />

Last updated on Mar 26, 2021.

Created using

<a href="http://sphinx-doc.org/">Sphinx</a> 3.2.1.

Doc version v3.4.0-2-gcb03754703.

</div>

</footer>

</body>

</html>

matplotlib.github.com/3.4.0/gallery/misc/agg_buffer.html at main · matplotlib/matplotlib.github.com · GitHub

Expand file tree

Breadcrumbs

agg_buffer.html

Latest commit

History

Breadcrumbs

agg_buffer.html

File metadata and controls