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<h1>Source code for PIL.WebPImagePlugin</h1><div class="highlight"><pre>
<span></span><span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">Image</span><span class="p">,</span> <span class="n">ImageFile</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">_webp</span>
<span class="n">SUPPORTED</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="n">SUPPORTED</span> <span class="o">=</span> <span class="kc">False</span>
<span class="kn">from</span> <span class="nn">io</span> <span class="k">import</span> <span class="n">BytesIO</span>
<span class="n">_VALID_WEBP_MODES</span> <span class="o">=</span> <span class="p">{</span>
<span class="s2">"RGBX"</span><span class="p">:</span> <span class="kc">True</span><span class="p">,</span>
<span class="s2">"RGBA"</span><span class="p">:</span> <span class="kc">True</span><span class="p">,</span>
<span class="s2">"RGB"</span><span class="p">:</span> <span class="kc">True</span><span class="p">,</span>
<span class="p">}</span>
<span class="n">_VALID_WEBP_LEGACY_MODES</span> <span class="o">=</span> <span class="p">{</span>
<span class="s2">"RGB"</span><span class="p">:</span> <span class="kc">True</span><span class="p">,</span>
<span class="s2">"RGBA"</span><span class="p">:</span> <span class="kc">True</span><span class="p">,</span>
<span class="p">}</span>
<span class="n">_VP8_MODES_BY_IDENTIFIER</span> <span class="o">=</span> <span class="p">{</span>
<span class="sa">b</span><span class="s2">"VP8 "</span><span class="p">:</span> <span class="s2">"RGB"</span><span class="p">,</span>
<span class="sa">b</span><span class="s2">"VP8X"</span><span class="p">:</span> <span class="s2">"RGBA"</span><span class="p">,</span>
<span class="sa">b</span><span class="s2">"VP8L"</span><span class="p">:</span> <span class="s2">"RGBA"</span><span class="p">,</span> <span class="c1"># lossless</span>
<span class="p">}</span>
<span class="k">def</span> <span class="nf">_accept</span><span class="p">(</span><span class="n">prefix</span><span class="p">):</span>
<span class="n">is_riff_file_format</span> <span class="o">=</span> <span class="n">prefix</span><span class="p">[:</span><span class="mi">4</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"RIFF"</span>
<span class="n">is_webp_file</span> <span class="o">=</span> <span class="n">prefix</span><span class="p">[</span><span class="mi">8</span><span class="p">:</span><span class="mi">12</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"WEBP"</span>
<span class="n">is_valid_vp8_mode</span> <span class="o">=</span> <span class="n">prefix</span><span class="p">[</span><span class="mi">12</span><span class="p">:</span><span class="mi">16</span><span class="p">]</span> <span class="ow">in</span> <span class="n">_VP8_MODES_BY_IDENTIFIER</span>
<span class="k">if</span> <span class="n">is_riff_file_format</span> <span class="ow">and</span> <span class="n">is_webp_file</span> <span class="ow">and</span> <span class="n">is_valid_vp8_mode</span><span class="p">:</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">SUPPORTED</span><span class="p">:</span>
<span class="k">return</span> <span class="s2">"image file could not be identified "</span> \
<span class="s2">"because WEBP support not installed"</span>
<span class="k">return</span> <span class="kc">True</span>
<div class="viewcode-block" id="WebPImageFile"><a class="viewcode-back" href="../../reference/plugins.html#PIL.WebPImagePlugin.WebPImageFile">[docs]</a><span class="k">class</span> <span class="nc">WebPImageFile</span><span class="p">(</span><span class="n">ImageFile</span><span class="o">.</span><span class="n">ImageFile</span><span class="p">):</span>
<span class="nb">format</span> <span class="o">=</span> <span class="s2">"WEBP"</span>
<span class="n">format_description</span> <span class="o">=</span> <span class="s2">"WebP image"</span>
<span class="k">def</span> <span class="nf">_open</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">_webp</span><span class="o">.</span><span class="n">HAVE_WEBPANIM</span><span class="p">:</span>
<span class="c1"># Legacy mode</span>
<span class="n">data</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="bp">self</span><span class="o">.</span><span class="n">mode</span><span class="p">,</span> <span class="n">icc_profile</span><span class="p">,</span> <span class="n">exif</span> <span class="o">=</span> \
<span class="n">_webp</span><span class="o">.</span><span class="n">WebPDecode</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">())</span>
<span class="k">if</span> <span class="n">icc_profile</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"icc_profile"</span><span class="p">]</span> <span class="o">=</span> <span class="n">icc_profile</span>
<span class="k">if</span> <span class="n">exif</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"exif"</span><span class="p">]</span> <span class="o">=</span> <span class="n">exif</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">=</span> <span class="n">width</span><span class="p">,</span> <span class="n">height</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="o">=</span> <span class="n">BytesIO</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tile</span> <span class="o">=</span> <span class="p">[(</span><span class="s2">"raw"</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="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">mode</span><span class="p">)]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_n_frames</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">return</span>
<span class="c1"># Use the newer AnimDecoder API to parse the (possibly) animated file,</span>
<span class="c1"># and access muxed chunks like ICC/EXIF/XMP.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_decoder</span> <span class="o">=</span> <span class="n">_webp</span><span class="o">.</span><span class="n">WebPAnimDecoder</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">())</span>
<span class="c1"># Get info from decoder</span>
<span class="n">width</span><span class="p">,</span> <span class="n">height</span><span class="p">,</span> <span class="n">loop_count</span><span class="p">,</span> <span class="n">bgcolor</span><span class="p">,</span> <span class="n">frame_count</span><span class="p">,</span> <span class="n">mode</span> <span class="o">=</span> \
<span class="bp">self</span><span class="o">.</span><span class="n">_decoder</span><span class="o">.</span><span class="n">get_info</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">width</span><span class="p">,</span> <span class="n">height</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"loop"</span><span class="p">]</span> <span class="o">=</span> <span class="n">loop_count</span>
<span class="n">bg_a</span><span class="p">,</span> <span class="n">bg_r</span><span class="p">,</span> <span class="n">bg_g</span><span class="p">,</span> <span class="n">bg_b</span> <span class="o">=</span> \
<span class="p">(</span><span class="n">bgcolor</span> <span class="o">>></span> <span class="mi">24</span><span class="p">)</span> <span class="o">&</span> <span class="mh">0xFF</span><span class="p">,</span> \
<span class="p">(</span><span class="n">bgcolor</span> <span class="o">>></span> <span class="mi">16</span><span class="p">)</span> <span class="o">&</span> <span class="mh">0xFF</span><span class="p">,</span> \
<span class="p">(</span><span class="n">bgcolor</span> <span class="o">>></span> <span class="mi">8</span><span class="p">)</span> <span class="o">&</span> <span class="mh">0xFF</span><span class="p">,</span> \
<span class="n">bgcolor</span> <span class="o">&</span> <span class="mh">0xFF</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"background"</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">bg_r</span><span class="p">,</span> <span class="n">bg_g</span><span class="p">,</span> <span class="n">bg_b</span><span class="p">,</span> <span class="n">bg_a</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_n_frames</span> <span class="o">=</span> <span class="n">frame_count</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="o">=</span> <span class="s1">'RGB'</span> <span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="s1">'RGBX'</span> <span class="k">else</span> <span class="n">mode</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rawmode</span> <span class="o">=</span> <span class="n">mode</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tile</span> <span class="o">=</span> <span class="p">[]</span>
<span class="c1"># Attempt to read ICC / EXIF / XMP chunks from file</span>
<span class="n">icc_profile</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_decoder</span><span class="o">.</span><span class="n">get_chunk</span><span class="p">(</span><span class="s2">"ICCP"</span><span class="p">)</span>
<span class="n">exif</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_decoder</span><span class="o">.</span><span class="n">get_chunk</span><span class="p">(</span><span class="s2">"EXIF"</span><span class="p">)</span>
<span class="n">xmp</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_decoder</span><span class="o">.</span><span class="n">get_chunk</span><span class="p">(</span><span class="s2">"XMP "</span><span class="p">)</span>
<span class="k">if</span> <span class="n">icc_profile</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"icc_profile"</span><span class="p">]</span> <span class="o">=</span> <span class="n">icc_profile</span>
<span class="k">if</span> <span class="n">exif</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"exif"</span><span class="p">]</span> <span class="o">=</span> <span class="n">exif</span>
<span class="k">if</span> <span class="n">xmp</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"xmp"</span><span class="p">]</span> <span class="o">=</span> <span class="n">xmp</span>
<span class="c1"># Initialize seek state</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_reset</span><span class="p">(</span><span class="n">reset</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_getexif</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="kn">from</span> <span class="nn">.JpegImagePlugin</span> <span class="k">import</span> <span class="n">_getexif</span>
<span class="k">return</span> <span class="n">_getexif</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">n_frames</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_n_frames</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">is_animated</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_n_frames</span> <span class="o">></span> <span class="mi">1</span>
<div class="viewcode-block" id="WebPImageFile.seek"><a class="viewcode-back" href="../../reference/plugins.html#PIL.WebPImagePlugin.WebPImageFile.seek">[docs]</a> <span class="k">def</span> <span class="nf">seek</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">frame</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">_webp</span><span class="o">.</span><span class="n">HAVE_WEBPANIM</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">WebPImageFile</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">frame</span><span class="p">)</span>
<span class="c1"># Perform some simple checks first</span>
<span class="k">if</span> <span class="n">frame</span> <span class="o">>=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_n_frames</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">EOFError</span><span class="p">(</span><span class="s2">"attempted to seek beyond end of sequence"</span><span class="p">)</span>
<span class="k">if</span> <span class="n">frame</span> <span class="o"><</span> <span class="mi">0</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">EOFError</span><span class="p">(</span><span class="s2">"negative frame index is not valid"</span><span class="p">)</span>
<span class="c1"># Set logical frame to requested position</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__logical_frame</span> <span class="o">=</span> <span class="n">frame</span></div>
<span class="k">def</span> <span class="nf">_reset</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">reset</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
<span class="k">if</span> <span class="n">reset</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_decoder</span><span class="o">.</span><span class="n">reset</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__physical_frame</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__loaded</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__timestamp</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">def</span> <span class="nf">_get_next</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Get next frame</span>
<span class="n">ret</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_decoder</span><span class="o">.</span><span class="n">get_next</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__physical_frame</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="c1"># Check if an error occurred</span>
<span class="k">if</span> <span class="n">ret</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_reset</span><span class="p">()</span> <span class="c1"># Reset just to be safe</span>
<span class="bp">self</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="k">raise</span> <span class="ne">EOFError</span><span class="p">(</span><span class="s2">"failed to decode next frame in WebP file"</span><span class="p">)</span>
<span class="c1"># Compute duration</span>
<span class="n">data</span><span class="p">,</span> <span class="n">timestamp</span> <span class="o">=</span> <span class="n">ret</span>
<span class="n">duration</span> <span class="o">=</span> <span class="n">timestamp</span> <span class="o">-</span> <span class="bp">self</span><span class="o">.</span><span class="n">__timestamp</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__timestamp</span> <span class="o">=</span> <span class="n">timestamp</span>
<span class="c1"># libwebp gives frame end, adjust to start of frame</span>
<span class="n">timestamp</span> <span class="o">-=</span> <span class="n">duration</span>
<span class="k">return</span> <span class="n">data</span><span class="p">,</span> <span class="n">timestamp</span><span class="p">,</span> <span class="n">duration</span>
<span class="k">def</span> <span class="nf">_seek</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">frame</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__physical_frame</span> <span class="o">==</span> <span class="n">frame</span><span class="p">:</span>
<span class="k">return</span> <span class="c1"># Nothing to do</span>
<span class="k">if</span> <span class="n">frame</span> <span class="o"><</span> <span class="bp">self</span><span class="o">.</span><span class="n">__physical_frame</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_reset</span><span class="p">()</span> <span class="c1"># Rewind to beginning</span>
<span class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">__physical_frame</span> <span class="o"><</span> <span class="n">frame</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_get_next</span><span class="p">()</span> <span class="c1"># Advance to the requested frame</span>
<div class="viewcode-block" id="WebPImageFile.load"><a class="viewcode-back" href="../../reference/plugins.html#PIL.WebPImagePlugin.WebPImageFile.load">[docs]</a> <span class="k">def</span> <span class="nf">load</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="n">_webp</span><span class="o">.</span><span class="n">HAVE_WEBPANIM</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__loaded</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">__logical_frame</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_seek</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__logical_frame</span><span class="p">)</span>
<span class="c1"># We need to load the image data for this frame</span>
<span class="n">data</span><span class="p">,</span> <span class="n">timestamp</span><span class="p">,</span> <span class="n">duration</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_next</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"timestamp"</span><span class="p">]</span> <span class="o">=</span> <span class="n">timestamp</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"duration"</span><span class="p">]</span> <span class="o">=</span> <span class="n">duration</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__loaded</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">__logical_frame</span>
<span class="c1"># Set tile</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_exclusive_fp</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="o">=</span> <span class="n">BytesIO</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tile</span> <span class="o">=</span> <span class="p">[(</span><span class="s2">"raw"</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="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">rawmode</span><span class="p">)]</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">WebPImageFile</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">load</span><span class="p">()</span></div>
<div class="viewcode-block" id="WebPImageFile.tell"><a class="viewcode-back" href="../../reference/plugins.html#PIL.WebPImagePlugin.WebPImageFile.tell">[docs]</a> <span class="k">def</span> <span class="nf">tell</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">_webp</span><span class="o">.</span><span class="n">HAVE_WEBPANIM</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">WebPImageFile</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">tell</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__logical_frame</span></div></div>
<span class="k">def</span> <span class="nf">_save_all</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">filename</span><span class="p">):</span>
<span class="n">encoderinfo</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="n">append_images</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"append_images"</span><span class="p">,</span> <span class="p">[]))</span>
<span class="c1"># If total frame count is 1, then save using the legacy API, which</span>
<span class="c1"># will preserve non-alpha modes</span>
<span class="n">total</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">for</span> <span class="n">ims</span> <span class="ow">in</span> <span class="p">[</span><span class="n">im</span><span class="p">]</span><span class="o">+</span><span class="n">append_images</span><span class="p">:</span>
<span class="n">total</span> <span class="o">+=</span> <span class="mi">1</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">ims</span><span class="p">,</span> <span class="s2">"n_frames"</span><span class="p">)</span> <span class="k">else</span> <span class="n">ims</span><span class="o">.</span><span class="n">n_frames</span>
<span class="k">if</span> <span class="n">total</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">_save</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span>
<span class="k">return</span>
<span class="n">background</span> <span class="o">=</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="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">if</span> <span class="s2">"background"</span> <span class="ow">in</span> <span class="n">encoderinfo</span><span class="p">:</span>
<span class="n">background</span> <span class="o">=</span> <span class="n">encoderinfo</span><span class="p">[</span><span class="s2">"background"</span><span class="p">]</span>
<span class="k">elif</span> <span class="s2">"background"</span> <span class="ow">in</span> <span class="n">im</span><span class="o">.</span><span class="n">info</span><span class="p">:</span>
<span class="n">background</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"background"</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">background</span><span class="p">,</span> <span class="nb">int</span><span class="p">):</span>
<span class="c1"># GifImagePlugin stores a global color table index in</span>
<span class="c1"># info["background"]. So it must be converted to an RGBA value</span>
<span class="n">palette</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">getpalette</span><span class="p">()</span>
<span class="k">if</span> <span class="n">palette</span><span class="p">:</span>
<span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">palette</span><span class="p">[</span><span class="n">background</span><span class="o">*</span><span class="mi">3</span><span class="p">:(</span><span class="n">background</span><span class="o">+</span><span class="mi">1</span><span class="p">)</span><span class="o">*</span><span class="mi">3</span><span class="p">]</span>
<span class="n">background</span> <span class="o">=</span> <span class="p">(</span><span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">duration</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"duration"</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">loop</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"loop"</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">minimize_size</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"minimize_size"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
<span class="n">kmin</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"kmin"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="n">kmax</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"kmax"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="n">allow_mixed</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"allow_mixed"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
<span class="n">verbose</span> <span class="o">=</span> <span class="kc">False</span>
<span class="n">lossless</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"lossless"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
<span class="n">quality</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"quality"</span><span class="p">,</span> <span class="mi">80</span><span class="p">)</span>
<span class="n">method</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"method"</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">icc_profile</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"icc_profile"</span><span class="p">,</span> <span class="s2">""</span><span class="p">)</span>
<span class="n">exif</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"exif"</span><span class="p">,</span> <span class="s2">""</span><span class="p">)</span>
<span class="n">xmp</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"xmp"</span><span class="p">,</span> <span class="s2">""</span><span class="p">)</span>
<span class="k">if</span> <span class="n">allow_mixed</span><span class="p">:</span>
<span class="n">lossless</span> <span class="o">=</span> <span class="kc">False</span>
<span class="c1"># Sensible keyframe defaults are from gif2webp.c script</span>
<span class="k">if</span> <span class="n">kmin</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">kmin</span> <span class="o">=</span> <span class="mi">9</span> <span class="k">if</span> <span class="n">lossless</span> <span class="k">else</span> <span class="mi">3</span>
<span class="k">if</span> <span class="n">kmax</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">kmax</span> <span class="o">=</span> <span class="mi">17</span> <span class="k">if</span> <span class="n">lossless</span> <span class="k">else</span> <span class="mi">5</span>
<span class="c1"># Validate background color</span>
<span class="k">if</span> <span class="p">(</span><span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">background</span><span class="p">,</span> <span class="p">(</span><span class="nb">list</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">))</span> <span class="ow">or</span> <span class="nb">len</span><span class="p">(</span><span class="n">background</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">4</span> <span class="ow">or</span>
<span class="ow">not</span> <span class="nb">all</span><span class="p">(</span><span class="n">v</span> <span class="o">>=</span> <span class="mi">0</span> <span class="ow">and</span> <span class="n">v</span> <span class="o"><</span> <span class="mi">256</span> <span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">background</span><span class="p">)):</span>
<span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"Background color is not an RGBA tuple clamped "</span>
<span class="s2">"to (0-255): </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">background</span><span class="p">))</span>
<span class="c1"># Convert to packed uint</span>
<span class="n">bg_r</span><span class="p">,</span> <span class="n">bg_g</span><span class="p">,</span> <span class="n">bg_b</span><span class="p">,</span> <span class="n">bg_a</span> <span class="o">=</span> <span class="n">background</span>
<span class="n">background</span> <span class="o">=</span> <span class="p">(</span><span class="n">bg_a</span> <span class="o"><<</span> <span class="mi">24</span><span class="p">)</span> <span class="o">|</span> <span class="p">(</span><span class="n">bg_r</span> <span class="o"><<</span> <span class="mi">16</span><span class="p">)</span> <span class="o">|</span> <span class="p">(</span><span class="n">bg_g</span> <span class="o"><<</span> <span class="mi">8</span><span class="p">)</span> <span class="o">|</span> <span class="p">(</span><span class="n">bg_b</span> <span class="o"><<</span> <span class="mi">0</span><span class="p">)</span>
<span class="c1"># Setup the WebP animation encoder</span>
<span class="n">enc</span> <span class="o">=</span> <span class="n">_webp</span><span class="o">.</span><span class="n">WebPAnimEncoder</span><span class="p">(</span>
<span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span>
<span class="n">background</span><span class="p">,</span>
<span class="n">loop</span><span class="p">,</span>
<span class="n">minimize_size</span><span class="p">,</span>
<span class="n">kmin</span><span class="p">,</span> <span class="n">kmax</span><span class="p">,</span>
<span class="n">allow_mixed</span><span class="p">,</span>
<span class="n">verbose</span>
<span class="p">)</span>
<span class="c1"># Add each frame</span>
<span class="n">frame_idx</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">timestamp</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">cur_idx</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">tell</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">for</span> <span class="n">ims</span> <span class="ow">in</span> <span class="p">[</span><span class="n">im</span><span class="p">]</span><span class="o">+</span><span class="n">append_images</span><span class="p">:</span>
<span class="c1"># Get # of frames in this image</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">ims</span><span class="p">,</span> <span class="s2">"n_frames"</span><span class="p">):</span>
<span class="n">nfr</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">nfr</span> <span class="o">=</span> <span class="n">ims</span><span class="o">.</span><span class="n">n_frames</span>
<span class="k">for</span> <span class="n">idx</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">nfr</span><span class="p">):</span>
<span class="n">ims</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">idx</span><span class="p">)</span>
<span class="n">ims</span><span class="o">.</span><span class="n">load</span><span class="p">()</span>
<span class="c1"># Make sure image mode is supported</span>
<span class="n">frame</span> <span class="o">=</span> <span class="n">ims</span>
<span class="n">rawmode</span> <span class="o">=</span> <span class="n">ims</span><span class="o">.</span><span class="n">mode</span>
<span class="k">if</span> <span class="n">ims</span><span class="o">.</span><span class="n">mode</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">_VALID_WEBP_MODES</span><span class="p">:</span>
<span class="n">alpha</span> <span class="o">=</span> <span class="s1">'A'</span> <span class="ow">in</span> <span class="n">ims</span><span class="o">.</span><span class="n">mode</span> <span class="ow">or</span> <span class="s1">'a'</span> <span class="ow">in</span> <span class="n">ims</span><span class="o">.</span><span class="n">mode</span> \
<span class="ow">or</span> <span class="p">(</span><span class="n">ims</span><span class="o">.</span><span class="n">mode</span> <span class="o">==</span> <span class="s1">'P'</span> <span class="ow">and</span>
<span class="s1">'A'</span> <span class="ow">in</span> <span class="n">ims</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">getpalettemode</span><span class="p">())</span>
<span class="n">rawmode</span> <span class="o">=</span> <span class="s1">'RGBA'</span> <span class="k">if</span> <span class="n">alpha</span> <span class="k">else</span> <span class="s1">'RGB'</span>
<span class="n">frame</span> <span class="o">=</span> <span class="n">ims</span><span class="o">.</span><span class="n">convert</span><span class="p">(</span><span class="n">rawmode</span><span class="p">)</span>
<span class="k">if</span> <span class="n">rawmode</span> <span class="o">==</span> <span class="s1">'RGB'</span><span class="p">:</span>
<span class="c1"># For faster conversion, use RGBX</span>
<span class="n">rawmode</span> <span class="o">=</span> <span class="s1">'RGBX'</span>
<span class="c1"># Append the frame to the animation encoder</span>
<span class="n">enc</span><span class="o">.</span><span class="n">add</span><span class="p">(</span>
<span class="n">frame</span><span class="o">.</span><span class="n">tobytes</span><span class="p">(</span><span class="s1">'raw'</span><span class="p">,</span> <span class="n">rawmode</span><span class="p">),</span>
<span class="n">timestamp</span><span class="p">,</span>
<span class="n">frame</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">frame</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span>
<span class="n">rawmode</span><span class="p">,</span>
<span class="n">lossless</span><span class="p">,</span>
<span class="n">quality</span><span class="p">,</span>
<span class="n">method</span>
<span class="p">)</span>
<span class="c1"># Update timestamp and frame index</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">duration</span><span class="p">,</span> <span class="p">(</span><span class="nb">list</span><span class="p">,</span> <span class="nb">tuple</span><span class="p">)):</span>
<span class="n">timestamp</span> <span class="o">+=</span> <span class="n">duration</span><span class="p">[</span><span class="n">frame_idx</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">timestamp</span> <span class="o">+=</span> <span class="n">duration</span>
<span class="n">frame_idx</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">finally</span><span class="p">:</span>
<span class="n">im</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">cur_idx</span><span class="p">)</span>
<span class="c1"># Force encoder to flush frames</span>
<span class="n">enc</span><span class="o">.</span><span class="n">add</span><span class="p">(</span>
<span class="kc">None</span><span class="p">,</span>
<span class="n">timestamp</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="s2">""</span><span class="p">,</span> <span class="n">lossless</span><span class="p">,</span> <span class="n">quality</span><span class="p">,</span> <span class="mi">0</span>
<span class="p">)</span>
<span class="c1"># Get the final output from the encoder</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">enc</span><span class="o">.</span><span class="n">assemble</span><span class="p">(</span><span class="n">icc_profile</span><span class="p">,</span> <span class="n">exif</span><span class="p">,</span> <span class="n">xmp</span><span class="p">)</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"cannot write file as WebP (encoder returned None)"</span><span class="p">)</span>
<span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_save</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">filename</span><span class="p">):</span>
<span class="n">lossless</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"lossless"</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
<span class="n">quality</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"quality"</span><span class="p">,</span> <span class="mi">80</span><span class="p">)</span>
<span class="n">icc_profile</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"icc_profile"</span><span class="p">,</span> <span class="s2">""</span><span class="p">)</span>
<span class="n">exif</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"exif"</span><span class="p">,</span> <span class="s2">""</span><span class="p">)</span>
<span class="n">xmp</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"xmp"</span><span class="p">,</span> <span class="s2">""</span><span class="p">)</span>
<span class="k">if</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">_VALID_WEBP_LEGACY_MODES</span><span class="p">:</span>
<span class="n">alpha</span> <span class="o">=</span> <span class="s1">'A'</span> <span class="ow">in</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="ow">or</span> <span class="s1">'a'</span> <span class="ow">in</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> \
<span class="ow">or</span> <span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="o">==</span> <span class="s1">'P'</span> <span class="ow">and</span> <span class="s1">'A'</span> <span class="ow">in</span> <span class="n">im</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">getpalettemode</span><span class="p">())</span>
<span class="n">im</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">convert</span><span class="p">(</span><span class="s1">'RGBA'</span> <span class="k">if</span> <span class="n">alpha</span> <span class="k">else</span> <span class="s1">'RGB'</span><span class="p">)</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">_webp</span><span class="o">.</span><span class="n">WebPEncode</span><span class="p">(</span>
<span class="n">im</span><span class="o">.</span><span class="n">tobytes</span><span class="p">(),</span>
<span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span>
<span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span>
<span class="n">lossless</span><span class="p">,</span>
<span class="nb">float</span><span class="p">(</span><span class="n">quality</span><span class="p">),</span>
<span class="n">im</span><span class="o">.</span><span class="n">mode</span><span class="p">,</span>
<span class="n">icc_profile</span><span class="p">,</span>
<span class="n">exif</span><span class="p">,</span>
<span class="n">xmp</span>
<span class="p">)</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"cannot write file as WebP (encoder returned None)"</span><span class="p">)</span>
<span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="n">Image</span><span class="o">.</span><span class="n">register_open</span><span class="p">(</span><span class="n">WebPImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">WebPImageFile</span><span class="p">,</span> <span class="n">_accept</span><span class="p">)</span>
<span class="k">if</span> <span class="n">SUPPORTED</span><span class="p">:</span>
<span class="n">Image</span><span class="o">.</span><span class="n">register_save</span><span class="p">(</span><span class="n">WebPImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">_save</span><span class="p">)</span>
<span class="k">if</span> <span class="n">_webp</span><span class="o">.</span><span class="n">HAVE_WEBPANIM</span><span class="p">:</span>
<span class="n">Image</span><span class="o">.</span><span class="n">register_save_all</span><span class="p">(</span><span class="n">WebPImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">_save_all</span><span class="p">)</span>
<span class="n">Image</span><span class="o">.</span><span class="n">register_extension</span><span class="p">(</span><span class="n">WebPImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="s2">".webp"</span><span class="p">)</span>
<span class="n">Image</span><span class="o">.</span><span class="n">register_mime</span><span class="p">(</span><span class="n">WebPImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="s2">"image/webp"</span><span class="p">)</span>
</pre></div>
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