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<h1>Source code for PIL.GifImagePlugin</h1><div class="highlight"><pre>
<span></span><span class="c1">#</span>
<span class="c1"># The Python Imaging Library.</span>
<span class="c1"># $Id$</span>
<span class="c1">#</span>
<span class="c1"># GIF file handling</span>
<span class="c1">#</span>
<span class="c1"># History:</span>
<span class="c1"># 1995-09-01 fl Created</span>
<span class="c1"># 1996-12-14 fl Added interlace support</span>
<span class="c1"># 1996-12-30 fl Added animation support</span>
<span class="c1"># 1997-01-05 fl Added write support, fixed local colour map bug</span>
<span class="c1"># 1997-02-23 fl Make sure to load raster data in getdata()</span>
<span class="c1"># 1997-07-05 fl Support external decoder (0.4)</span>
<span class="c1"># 1998-07-09 fl Handle all modes when saving (0.5)</span>
<span class="c1"># 1998-07-15 fl Renamed offset attribute to avoid name clash</span>
<span class="c1"># 2001-04-16 fl Added rewind support (seek to frame 0) (0.6)</span>
<span class="c1"># 2001-04-17 fl Added palette optimization (0.7)</span>
<span class="c1"># 2002-06-06 fl Added transparency support for save (0.8)</span>
<span class="c1"># 2004-02-24 fl Disable interlacing for small images</span>
<span class="c1">#</span>
<span class="c1"># Copyright (c) 1997-2004 by Secret Labs AB</span>
<span class="c1"># Copyright (c) 1995-2004 by Fredrik Lundh</span>
<span class="c1">#</span>
<span class="c1"># See the README file for information on usage and redistribution.</span>
<span class="c1">#</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="p">,</span> <span class="n">ImagePalette</span><span class="p">,</span> <span class="n">ImageChops</span><span class="p">,</span> <span class="n">ImageSequence</span>
<span class="kn">from</span> <span class="nn">._binary</span> <span class="k">import</span> <span class="n">i8</span><span class="p">,</span> <span class="n">i16le</span> <span class="k">as</span> <span class="n">i16</span><span class="p">,</span> <span class="n">o8</span><span class="p">,</span> <span class="n">o16le</span> <span class="k">as</span> <span class="n">o16</span>
<span class="kn">import</span> <span class="nn">itertools</span>
<span class="n">__version__</span> <span class="o">=</span> <span class="s2">"0.9"</span>
<span class="c1"># --------------------------------------------------------------------</span>
<span class="c1"># Identify/read GIF files</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="k">return</span> <span class="n">prefix</span><span class="p">[:</span><span class="mi">6</span><span class="p">]</span> <span class="ow">in</span> <span class="p">[</span><span class="sa">b</span><span class="s2">"GIF87a"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"GIF89a"</span><span class="p">]</span>
<span class="c1">##</span>
<span class="c1"># Image plugin for GIF images. This plugin supports both GIF87 and</span>
<span class="c1"># GIF89 images.</span>
<div class="viewcode-block" id="GifImageFile"><a class="viewcode-back" href="../../reference/plugins.html#PIL.GifImagePlugin.GifImageFile">[docs]</a><span class="k">class</span> <span class="nc">GifImageFile</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">"GIF"</span>
<span class="n">format_description</span> <span class="o">=</span> <span class="s2">"Compuserve GIF"</span>
<span class="n">_close_exclusive_fp_after_loading</span> <span class="o">=</span> <span class="kc">False</span>
<span class="n">global_palette</span> <span class="o">=</span> <span class="kc">None</span>
<div class="viewcode-block" id="GifImageFile.data"><a class="viewcode-back" href="../../reference/plugins.html#PIL.GifImagePlugin.GifImageFile.data">[docs]</a> <span class="k">def</span> <span class="nf">data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">s</span> <span class="o">=</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="mi">1</span><span class="p">)</span>
<span class="k">if</span> <span class="n">s</span> <span class="ow">and</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">):</span>
<span class="k">return</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="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">))</span>
<span class="k">return</span> <span class="kc">None</span></div>
<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="c1"># Screen</span>
<span class="n">s</span> <span class="o">=</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="mi">13</span><span class="p">)</span>
<span class="k">if</span> <span class="n">s</span><span class="p">[:</span><span class="mi">6</span><span class="p">]</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">[</span><span class="sa">b</span><span class="s2">"GIF87a"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"GIF89a"</span><span class="p">]:</span>
<span class="k">raise</span> <span class="ne">SyntaxError</span><span class="p">(</span><span class="s2">"not a GIF file"</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">"version"</span><span class="p">]</span> <span class="o">=</span> <span class="n">s</span><span class="p">[:</span><span class="mi">6</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">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">6</span><span class="p">:]),</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">8</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="n">flags</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">10</span><span class="p">])</span>
<span class="n">bits</span> <span class="o">=</span> <span class="p">(</span><span class="n">flags</span> <span class="o">&</span> <span class="mi">7</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span>
<span class="k">if</span> <span class="n">flags</span> <span class="o">&</span> <span class="mi">128</span><span class="p">:</span>
<span class="c1"># get global palette</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="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">11</span><span class="p">])</span>
<span class="c1"># check if palette contains colour indices</span>
<span class="n">p</span> <span class="o">=</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="mi">3</span> <span class="o"><<</span> <span class="n">bits</span><span class="p">)</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">p</span><span class="p">),</span> <span class="mi">3</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">i</span><span class="o">//</span><span class="mi">3</span> <span class="o">==</span> <span class="n">i8</span><span class="p">(</span><span class="n">p</span><span class="p">[</span><span class="n">i</span><span class="p">])</span> <span class="o">==</span> <span class="n">i8</span><span class="p">(</span><span class="n">p</span><span class="p">[</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span><span class="p">])</span> <span class="o">==</span> <span class="n">i8</span><span class="p">(</span><span class="n">p</span><span class="p">[</span><span class="n">i</span><span class="o">+</span><span class="mi">2</span><span class="p">])):</span>
<span class="n">p</span> <span class="o">=</span> <span class="n">ImagePalette</span><span class="o">.</span><span class="n">raw</span><span class="p">(</span><span class="s2">"RGB"</span><span class="p">,</span> <span class="n">p</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">global_palette</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">palette</span> <span class="o">=</span> <span class="n">p</span>
<span class="k">break</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__fp</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="c1"># FIXME: hack</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__rewind</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">tell</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="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_is_animated</span> <span class="o">=</span> <span class="kc">None</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="c1"># get ready to read first frame</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">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_n_frames</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">current</span> <span class="o">=</span> <span class="bp">self</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">while</span> <span class="kc">True</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">tell</span><span class="p">()</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">EOFError</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="bp">self</span><span class="o">.</span><span class="n">tell</span><span class="p">()</span> <span class="o">+</span> <span class="mi">1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">current</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">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_is_animated</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_n_frames</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_is_animated</span> <span class="o">=</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">else</span><span class="p">:</span>
<span class="n">current</span> <span class="o">=</span> <span class="bp">self</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="bp">self</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_is_animated</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">except</span> <span class="ne">EOFError</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_is_animated</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">current</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_is_animated</span>
<div class="viewcode-block" id="GifImageFile.seek"><a class="viewcode-back" href="../../reference/plugins.html#PIL.GifImagePlugin.GifImageFile.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="bp">self</span><span class="o">.</span><span class="n">_seek_check</span><span class="p">(</span><span class="n">frame</span><span class="p">):</span>
<span class="k">return</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">__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="mi">0</span><span class="p">)</span>
<span class="n">last_frame</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">__frame</span>
<span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__frame</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> <span class="n">frame</span> <span class="o">+</span> <span class="mi">1</span><span class="p">):</span>
<span class="k">try</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="n">f</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">EOFError</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="n">last_frame</span><span class="p">)</span>
<span class="k">raise</span> <span class="ne">EOFError</span><span class="p">(</span><span class="s2">"no more images in GIF file"</span><span class="p">)</span></div>
<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="n">frame</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="c1"># rewind</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__offset</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dispose</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dispose_extent</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="c1"># x0, y0, x1, y1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__frame</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">__fp</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">__rewind</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_prev_im</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">disposal_method</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># ensure that the previous frame was loaded</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">load</span><span class="p">()</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">__frame</span> <span class="o">+</span> <span class="mi">1</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"cannot seek to frame </span><span class="si">%d</span><span class="s2">"</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">__frame</span> <span class="o">=</span> <span class="n">frame</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="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">__fp</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__offset</span><span class="p">:</span>
<span class="c1"># backup to last frame</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fp</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">__offset</span><span class="p">)</span>
<span class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">():</span>
<span class="k">pass</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__offset</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">dispose</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">paste</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dispose</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dispose_extent</span><span class="p">)</span>
<span class="kn">from</span> <span class="nn">copy</span> <span class="k">import</span> <span class="n">copy</span>
<span class="bp">self</span><span class="o">.</span><span class="n">palette</span> <span class="o">=</span> <span class="n">copy</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">global_palette</span><span class="p">)</span>
<span class="n">info</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
<span class="n">s</span> <span class="o">=</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="mi">1</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">s</span> <span class="ow">or</span> <span class="n">s</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">";"</span><span class="p">:</span>
<span class="k">break</span>
<span class="k">elif</span> <span class="n">s</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"!"</span><span class="p">:</span>
<span class="c1">#</span>
<span class="c1"># extensions</span>
<span class="c1">#</span>
<span class="n">s</span> <span class="o">=</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="mi">1</span><span class="p">)</span>
<span class="n">block</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">()</span>
<span class="k">if</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">)</span> <span class="o">==</span> <span class="mi">249</span><span class="p">:</span>
<span class="c1">#</span>
<span class="c1"># graphic control extension</span>
<span class="c1">#</span>
<span class="n">flags</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="n">block</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">if</span> <span class="n">flags</span> <span class="o">&</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">info</span><span class="p">[</span><span class="s2">"transparency"</span><span class="p">]</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="n">block</span><span class="p">[</span><span class="mi">3</span><span class="p">])</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">i16</span><span class="p">(</span><span class="n">block</span><span class="p">[</span><span class="mi">1</span><span class="p">:</span><span class="mi">3</span><span class="p">])</span> <span class="o">*</span> <span class="mi">10</span>
<span class="c1"># disposal method - find the value of bits 4 - 6</span>
<span class="n">dispose_bits</span> <span class="o">=</span> <span class="mb">0b00011100</span> <span class="o">&</span> <span class="n">flags</span>
<span class="n">dispose_bits</span> <span class="o">=</span> <span class="n">dispose_bits</span> <span class="o">>></span> <span class="mi">2</span>
<span class="k">if</span> <span class="n">dispose_bits</span><span class="p">:</span>
<span class="c1"># only set the dispose if it is not</span>
<span class="c1"># unspecified. I'm not sure if this is</span>
<span class="c1"># correct, but it seems to prevent the last</span>
<span class="c1"># frame from looking odd for some animations</span>
<span class="bp">self</span><span class="o">.</span><span class="n">disposal_method</span> <span class="o">=</span> <span class="n">dispose_bits</span>
<span class="k">elif</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">)</span> <span class="o">==</span> <span class="mi">254</span><span class="p">:</span>
<span class="c1">#</span>
<span class="c1"># comment extension</span>
<span class="c1">#</span>
<span class="k">while</span> <span class="n">block</span><span class="p">:</span>
<span class="k">if</span> <span class="s2">"comment"</span> <span class="ow">in</span> <span class="n">info</span><span class="p">:</span>
<span class="n">info</span><span class="p">[</span><span class="s2">"comment"</span><span class="p">]</span> <span class="o">+=</span> <span class="n">block</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">info</span><span class="p">[</span><span class="s2">"comment"</span><span class="p">]</span> <span class="o">=</span> <span class="n">block</span>
<span class="n">block</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">()</span>
<span class="k">continue</span>
<span class="k">elif</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">)</span> <span class="o">==</span> <span class="mi">255</span><span class="p">:</span>
<span class="c1">#</span>
<span class="c1"># application extension</span>
<span class="c1">#</span>
<span class="n">info</span><span class="p">[</span><span class="s2">"extension"</span><span class="p">]</span> <span class="o">=</span> <span class="n">block</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">tell</span><span class="p">()</span>
<span class="k">if</span> <span class="n">block</span><span class="p">[:</span><span class="mi">11</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"NETSCAPE2.0"</span><span class="p">:</span>
<span class="n">block</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">()</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">block</span><span class="p">)</span> <span class="o">>=</span> <span class="mi">3</span> <span class="ow">and</span> <span class="n">i8</span><span class="p">(</span><span class="n">block</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</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">i16</span><span class="p">(</span><span class="n">block</span><span class="p">[</span><span class="mi">1</span><span class="p">:</span><span class="mi">3</span><span class="p">])</span>
<span class="k">while</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">():</span>
<span class="k">pass</span>
<span class="k">elif</span> <span class="n">s</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">","</span><span class="p">:</span>
<span class="c1">#</span>
<span class="c1"># local image</span>
<span class="c1">#</span>
<span class="n">s</span> <span class="o">=</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="mi">9</span><span class="p">)</span>
<span class="c1"># extent</span>
<span class="n">x0</span><span class="p">,</span> <span class="n">y0</span> <span class="o">=</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">0</span><span class="p">:]),</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">2</span><span class="p">:])</span>
<span class="n">x1</span><span class="p">,</span> <span class="n">y1</span> <span class="o">=</span> <span class="n">x0</span> <span class="o">+</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">4</span><span class="p">:]),</span> <span class="n">y0</span> <span class="o">+</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">6</span><span class="p">:])</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dispose_extent</span> <span class="o">=</span> <span class="n">x0</span><span class="p">,</span> <span class="n">y0</span><span class="p">,</span> <span class="n">x1</span><span class="p">,</span> <span class="n">y1</span>
<span class="n">flags</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">8</span><span class="p">])</span>
<span class="n">interlace</span> <span class="o">=</span> <span class="p">(</span><span class="n">flags</span> <span class="o">&</span> <span class="mi">64</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="n">flags</span> <span class="o">&</span> <span class="mi">128</span><span class="p">:</span>
<span class="n">bits</span> <span class="o">=</span> <span class="p">(</span><span class="n">flags</span> <span class="o">&</span> <span class="mi">7</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">palette</span> <span class="o">=</span>\
<span class="n">ImagePalette</span><span class="o">.</span><span class="n">raw</span><span class="p">(</span><span class="s2">"RGB"</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="mi">3</span> <span class="o"><<</span> <span class="n">bits</span><span class="p">))</span>
<span class="c1"># image data</span>
<span class="n">bits</span> <span class="o">=</span> <span class="n">i8</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="mi">1</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__offset</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">tell</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">"gif"</span><span class="p">,</span>
<span class="p">(</span><span class="n">x0</span><span class="p">,</span> <span class="n">y0</span><span class="p">,</span> <span class="n">x1</span><span class="p">,</span> <span class="n">y1</span><span class="p">),</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__offset</span><span class="p">,</span>
<span class="p">(</span><span class="n">bits</span><span class="p">,</span> <span class="n">interlace</span><span class="p">))]</span>
<span class="k">break</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">pass</span>
<span class="c1"># raise IOError, "illegal GIF tag `%x`" % i8(s)</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">disposal_method</span> <span class="o"><</span> <span class="mi">2</span><span class="p">:</span>
<span class="c1"># do not dispose or none specified</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dispose</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">disposal_method</span> <span class="o">==</span> <span class="mi">2</span><span class="p">:</span>
<span class="c1"># replace with background colour</span>
<span class="n">Image</span><span class="o">.</span><span class="n">_decompression_bomb_check</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dispose</span> <span class="o">=</span> <span class="n">Image</span><span class="o">.</span><span class="n">core</span><span class="o">.</span><span class="n">fill</span><span class="p">(</span><span class="s2">"P"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</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">"background"</span><span class="p">])</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># replace with previous contents</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dispose</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="c1"># only dispose the extent in this frame</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">dispose</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dispose</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_crop</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dispose</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dispose_extent</span><span class="p">)</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">AttributeError</span><span class="p">,</span> <span class="ne">KeyError</span><span class="p">):</span>
<span class="k">pass</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">tile</span><span class="p">:</span>
<span class="c1"># self.__fp = None</span>
<span class="k">raise</span> <span class="ne">EOFError</span>
<span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">"transparency"</span><span class="p">,</span> <span class="s2">"duration"</span><span class="p">,</span> <span class="s2">"comment"</span><span class="p">,</span> <span class="s2">"extension"</span><span class="p">,</span> <span class="s2">"loop"</span><span class="p">]:</span>
<span class="k">if</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">info</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="n">k</span><span class="p">]</span> <span class="o">=</span> <span class="n">info</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
<span class="k">elif</span> <span class="n">k</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">:</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="o">=</span> <span class="s2">"L"</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">palette</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="o">=</span> <span class="s2">"P"</span>
<div class="viewcode-block" id="GifImageFile.tell"><a class="viewcode-back" href="../../reference/plugins.html#PIL.GifImagePlugin.GifImageFile.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">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__frame</span></div>
<div class="viewcode-block" id="GifImageFile.load_end"><a class="viewcode-back" href="../../reference/plugins.html#PIL.GifImagePlugin.GifImageFile.load_end">[docs]</a> <span class="k">def</span> <span class="nf">load_end</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">ImageFile</span><span class="o">.</span><span class="n">ImageFile</span><span class="o">.</span><span class="n">load_end</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="c1"># if the disposal method is 'do not dispose', transparent</span>
<span class="c1"># pixels should show the content of the previous frame</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_prev_im</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">disposal_method</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
<span class="c1"># we do this by pasting the updated area onto the previous</span>
<span class="c1"># frame which we then use as the current image content</span>
<span class="n">updated</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_crop</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dispose_extent</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_prev_im</span><span class="o">.</span><span class="n">paste</span><span class="p">(</span><span class="n">updated</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">dispose_extent</span><span class="p">,</span>
<span class="n">updated</span><span class="o">.</span><span class="n">convert</span><span class="p">(</span><span class="s1">'RGBA'</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">im</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_prev_im</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_prev_im</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span></div>
<span class="k">def</span> <span class="nf">_close__fp</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__fp</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">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="k">except</span> <span class="ne">AttributeError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">finally</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="kc">None</span></div>
<span class="c1"># --------------------------------------------------------------------</span>
<span class="c1"># Write GIF files</span>
<span class="n">RAWMODE</span> <span class="o">=</span> <span class="p">{</span>
<span class="s2">"1"</span><span class="p">:</span> <span class="s2">"L"</span><span class="p">,</span>
<span class="s2">"L"</span><span class="p">:</span> <span class="s2">"L"</span><span class="p">,</span>
<span class="s2">"P"</span><span class="p">:</span> <span class="s2">"P"</span>
<span class="p">}</span>
<span class="k">def</span> <span class="nf">_normalize_mode</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">initial_call</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Takes an image (or frame), returns an image in a mode that is appropriate</span>
<span class="sd"> for saving in a Gif.</span>
<span class="sd"> It may return the original image, or it may return an image converted to</span>
<span class="sd"> palette or 'L' mode.</span>
<span class="sd"> UNDONE: What is the point of mucking with the initial call palette, for</span>
<span class="sd"> an image that shouldn't have a palette, or it would be a mode 'P' and</span>
<span class="sd"> get returned in the RAWMODE clause.</span>
<span class="sd"> :param im: Image object</span>
<span class="sd"> :param initial_call: Default false, set to true for a single frame.</span>
<span class="sd"> :returns: Image object</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="ow">in</span> <span class="n">RAWMODE</span><span class="p">:</span>
<span class="n">im</span><span class="o">.</span><span class="n">load</span><span class="p">()</span>
<span class="k">return</span> <span class="n">im</span>
<span class="k">if</span> <span class="n">Image</span><span class="o">.</span><span class="n">getmodebase</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="o">==</span> <span class="s2">"RGB"</span><span class="p">:</span>
<span class="k">if</span> <span class="n">initial_call</span><span class="p">:</span>
<span class="n">palette_size</span> <span class="o">=</span> <span class="mi">256</span>
<span class="k">if</span> <span class="n">im</span><span class="o">.</span><span class="n">palette</span><span class="p">:</span>
<span class="n">palette_size</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">palette</span><span class="o">.</span><span class="n">getdata</span><span class="p">()[</span><span class="mi">1</span><span class="p">])</span> <span class="o">//</span> <span class="mi">3</span>
<span class="k">return</span> <span class="n">im</span><span class="o">.</span><span class="n">convert</span><span class="p">(</span><span class="s2">"P"</span><span class="p">,</span> <span class="n">palette</span><span class="o">=</span><span class="n">Image</span><span class="o">.</span><span class="n">ADAPTIVE</span><span class="p">,</span> <span class="n">colors</span><span class="o">=</span><span class="n">palette_size</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="n">im</span><span class="o">.</span><span class="n">convert</span><span class="p">(</span><span class="s2">"P"</span><span class="p">)</span>
<span class="k">return</span> <span class="n">im</span><span class="o">.</span><span class="n">convert</span><span class="p">(</span><span class="s2">"L"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_normalize_palette</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">palette</span><span class="p">,</span> <span class="n">info</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Normalizes the palette for image.</span>
<span class="sd"> - Sets the palette to the incoming palette, if provided.</span>
<span class="sd"> - Ensures that there's a palette for L mode images</span>
<span class="sd"> - Optimizes the palette if necessary/desired.</span>
<span class="sd"> :param im: Image object</span>
<span class="sd"> :param palette: bytes object containing the source palette, or ....</span>
<span class="sd"> :param info: encoderinfo</span>
<span class="sd"> :returns: Image object</span>
<span class="sd"> """</span>
<span class="n">source_palette</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">palette</span><span class="p">:</span>
<span class="c1"># a bytes palette</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">palette</span><span class="p">,</span> <span class="p">(</span><span class="nb">bytes</span><span class="p">,</span> <span class="nb">bytearray</span><span class="p">,</span> <span class="nb">list</span><span class="p">)):</span>
<span class="n">source_palette</span> <span class="o">=</span> <span class="nb">bytearray</span><span class="p">(</span><span class="n">palette</span><span class="p">[:</span><span class="mi">768</span><span class="p">])</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">palette</span><span class="p">,</span> <span class="n">ImagePalette</span><span class="o">.</span><span class="n">ImagePalette</span><span class="p">):</span>
<span class="n">source_palette</span> <span class="o">=</span> <span class="nb">bytearray</span><span class="p">(</span><span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="o">.</span><span class="n">from_iterable</span><span class="p">(</span>
<span class="nb">zip</span><span class="p">(</span><span class="n">palette</span><span class="o">.</span><span class="n">palette</span><span class="p">[:</span><span class="mi">256</span><span class="p">],</span>
<span class="n">palette</span><span class="o">.</span><span class="n">palette</span><span class="p">[</span><span class="mi">256</span><span class="p">:</span><span class="mi">512</span><span class="p">],</span>
<span class="n">palette</span><span class="o">.</span><span class="n">palette</span><span class="p">[</span><span class="mi">512</span><span class="p">:</span><span class="mi">768</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="o">==</span> <span class="s2">"P"</span><span class="p">:</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">source_palette</span><span class="p">:</span>
<span class="n">source_palette</span> <span class="o">=</span> <span class="n">im</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="s2">"RGB"</span><span class="p">)[:</span><span class="mi">768</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span> <span class="c1"># L-mode</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">source_palette</span><span class="p">:</span>
<span class="n">source_palette</span> <span class="o">=</span> <span class="nb">bytearray</span><span class="p">(</span><span class="n">i</span><span class="o">//</span><span class="mi">3</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">768</span><span class="p">))</span>
<span class="n">im</span><span class="o">.</span><span class="n">palette</span> <span class="o">=</span> <span class="n">ImagePalette</span><span class="o">.</span><span class="n">ImagePalette</span><span class="p">(</span><span class="s2">"RGB"</span><span class="p">,</span>
<span class="n">palette</span><span class="o">=</span><span class="n">source_palette</span><span class="p">)</span>
<span class="n">used_palette_colors</span> <span class="o">=</span> <span class="n">_get_optimize</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">info</span><span class="p">)</span>
<span class="k">if</span> <span class="n">used_palette_colors</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="n">im</span><span class="o">.</span><span class="n">remap_palette</span><span class="p">(</span><span class="n">used_palette_colors</span><span class="p">,</span> <span class="n">source_palette</span><span class="p">)</span>
<span class="n">im</span><span class="o">.</span><span class="n">palette</span><span class="o">.</span><span class="n">palette</span> <span class="o">=</span> <span class="n">source_palette</span>
<span class="k">return</span> <span class="n">im</span>
<span class="k">def</span> <span class="nf">_write_single_frame</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">palette</span><span class="p">):</span>
<span class="n">im_out</span> <span class="o">=</span> <span class="n">_normalize_mode</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">im_out</span><span class="o">.</span><span class="n">info</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span>
<span class="n">im_out</span> <span class="o">=</span> <span class="n">_normalize_palette</span><span class="p">(</span><span class="n">im_out</span><span class="p">,</span> <span class="n">palette</span><span class="p">,</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">)</span>
<span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">_get_global_header</span><span class="p">(</span><span class="n">im_out</span><span class="p">,</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</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">s</span><span class="p">)</span>
<span class="c1"># local image header</span>
<span class="n">flags</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="n">get_interlace</span><span class="p">(</span><span class="n">im</span><span class="p">):</span>
<span class="n">flags</span> <span class="o">=</span> <span class="n">flags</span> <span class="o">|</span> <span class="mi">64</span>
<span class="n">_write_local_header</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">im</span><span class="p">,</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">),</span> <span class="n">flags</span><span class="p">)</span>
<span class="n">im_out</span><span class="o">.</span><span class="n">encoderconfig</span> <span class="o">=</span> <span class="p">(</span><span class="mi">8</span><span class="p">,</span> <span class="n">get_interlace</span><span class="p">(</span><span class="n">im</span><span class="p">))</span>
<span class="n">ImageFile</span><span class="o">.</span><span class="n">_save</span><span class="p">(</span><span class="n">im_out</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="p">[(</span><span class="s2">"gif"</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="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">RAWMODE</span><span class="p">[</span><span class="n">im_out</span><span class="o">.</span><span class="n">mode</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="sa">b</span><span class="s2">"</span><span class="se">\0</span><span class="s2">"</span><span class="p">)</span> <span class="c1"># end of image data</span>
<span class="k">def</span> <span class="nf">_write_multiple_frames</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">palette</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="n">im</span><span class="o">.</span><span class="n">info</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="n">disposal</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">"disposal"</span><span class="p">,</span> <span class="n">im</span><span class="o">.</span><span class="n">info</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"disposal"</span><span class="p">))</span>
<span class="n">im_frames</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">frame_count</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">for</span> <span class="n">imSequence</span> <span class="ow">in</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">([</span><span class="n">im</span><span class="p">],</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">"append_images"</span><span class="p">,</span> <span class="p">[])):</span>
<span class="k">for</span> <span class="n">im_frame</span> <span class="ow">in</span> <span class="n">ImageSequence</span><span class="o">.</span><span class="n">Iterator</span><span class="p">(</span><span class="n">imSequence</span><span class="p">):</span>
<span class="c1"># a copy is required here since seek can still mutate the image</span>
<span class="n">im_frame</span> <span class="o">=</span> <span class="n">_normalize_mode</span><span class="p">(</span><span class="n">im_frame</span><span class="o">.</span><span class="n">copy</span><span class="p">())</span>
<span class="k">if</span> <span class="n">frame_count</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">im_frame</span><span class="o">.</span><span class="n">info</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span>
<span class="n">im_frame</span> <span class="o">=</span> <span class="n">_normalize_palette</span><span class="p">(</span><span class="n">im_frame</span><span class="p">,</span> <span class="n">palette</span><span class="p">,</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</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="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">encoderinfo</span><span class="p">[</span><span class="s1">'duration'</span><span class="p">]</span> <span class="o">=</span> <span class="n">duration</span><span class="p">[</span><span class="n">frame_count</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">disposal</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">encoderinfo</span><span class="p">[</span><span class="s2">"disposal"</span><span class="p">]</span> <span class="o">=</span> <span class="n">disposal</span><span class="p">[</span><span class="n">frame_count</span><span class="p">]</span>
<span class="n">frame_count</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="n">im_frames</span><span class="p">:</span>
<span class="c1"># delta frame</span>
<span class="n">previous</span> <span class="o">=</span> <span class="n">im_frames</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
<span class="k">if</span> <span class="n">_get_palette_bytes</span><span class="p">(</span><span class="n">im_frame</span><span class="p">)</span> <span class="o">==</span> \
<span class="n">_get_palette_bytes</span><span class="p">(</span><span class="n">previous</span><span class="p">[</span><span class="s1">'im'</span><span class="p">]):</span>
<span class="n">delta</span> <span class="o">=</span> <span class="n">ImageChops</span><span class="o">.</span><span class="n">subtract_modulo</span><span class="p">(</span><span class="n">im_frame</span><span class="p">,</span>
<span class="n">previous</span><span class="p">[</span><span class="s1">'im'</span><span class="p">])</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">delta</span> <span class="o">=</span> <span class="n">ImageChops</span><span class="o">.</span><span class="n">subtract_modulo</span><span class="p">(</span>
<span class="n">im_frame</span><span class="o">.</span><span class="n">convert</span><span class="p">(</span><span class="s1">'RGB'</span><span class="p">),</span> <span class="n">previous</span><span class="p">[</span><span class="s1">'im'</span><span class="p">]</span><span class="o">.</span><span class="n">convert</span><span class="p">(</span><span class="s1">'RGB'</span><span class="p">))</span>
<span class="n">bbox</span> <span class="o">=</span> <span class="n">delta</span><span class="o">.</span><span class="n">getbbox</span><span class="p">()</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">bbox</span><span class="p">:</span>
<span class="c1"># This frame is identical to the previous frame</span>
<span class="k">if</span> <span class="n">duration</span><span class="p">:</span>
<span class="n">previous</span><span class="p">[</span><span class="s1">'encoderinfo'</span><span class="p">][</span><span class="s1">'duration'</span><span class="p">]</span> <span class="o">+=</span> \
<span class="n">encoderinfo</span><span class="p">[</span><span class="s1">'duration'</span><span class="p">]</span>
<span class="k">continue</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">bbox</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">im_frames</span><span class="o">.</span><span class="n">append</span><span class="p">({</span>
<span class="s1">'im'</span><span class="p">:</span> <span class="n">im_frame</span><span class="p">,</span>
<span class="s1">'bbox'</span><span class="p">:</span> <span class="n">bbox</span><span class="p">,</span>
<span class="s1">'encoderinfo'</span><span class="p">:</span> <span class="n">encoderinfo</span>
<span class="p">})</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">im_frames</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span>
<span class="k">for</span> <span class="n">frame_data</span> <span class="ow">in</span> <span class="n">im_frames</span><span class="p">:</span>
<span class="n">im_frame</span> <span class="o">=</span> <span class="n">frame_data</span><span class="p">[</span><span class="s1">'im'</span><span class="p">]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">frame_data</span><span class="p">[</span><span class="s1">'bbox'</span><span class="p">]:</span>
<span class="c1"># global header</span>
<span class="k">for</span> <span class="n">s</span> <span class="ow">in</span> <span class="n">_get_global_header</span><span class="p">(</span><span class="n">im_frame</span><span class="p">,</span>
<span class="n">frame_data</span><span class="p">[</span><span class="s1">'encoderinfo'</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">s</span><span class="p">)</span>
<span class="n">offset</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="k">else</span><span class="p">:</span>
<span class="c1"># compress difference</span>
<span class="n">frame_data</span><span class="p">[</span><span class="s1">'encoderinfo'</span><span class="p">][</span><span class="s1">'include_color_table'</span><span class="p">]</span> <span class="o">=</span> <span class="kc">True</span>
<span class="n">im_frame</span> <span class="o">=</span> <span class="n">im_frame</span><span class="o">.</span><span class="n">crop</span><span class="p">(</span><span class="n">frame_data</span><span class="p">[</span><span class="s1">'bbox'</span><span class="p">])</span>
<span class="n">offset</span> <span class="o">=</span> <span class="n">frame_data</span><span class="p">[</span><span class="s1">'bbox'</span><span class="p">][:</span><span class="mi">2</span><span class="p">]</span>
<span class="n">_write_frame_data</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">im_frame</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">frame_data</span><span class="p">[</span><span class="s1">'encoderinfo'</span><span class="p">])</span>
<span class="k">return</span> <span class="kc">True</span>
<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">_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">save_all</span><span class="o">=</span><span class="kc">True</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">save_all</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="c1"># header</span>
<span class="k">if</span> <span class="s2">"palette"</span> <span class="ow">in</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span> <span class="ow">or</span> <span class="s2">"palette"</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">palette</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">"palette"</span><span class="p">,</span> <span class="n">im</span><span class="o">.</span><span class="n">info</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"palette"</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">palette</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">[</span><span class="s2">"optimize"</span><span class="p">]</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">"optimize"</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">save_all</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">_write_multiple_frames</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">palette</span><span class="p">):</span>
<span class="n">_write_single_frame</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">palette</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="sa">b</span><span class="s2">";"</span><span class="p">)</span> <span class="c1"># end of file</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="s2">"flush"</span><span class="p">):</span>
<span class="n">fp</span><span class="o">.</span><span class="n">flush</span><span class="p">()</span>
<div class="viewcode-block" id="get_interlace"><a class="viewcode-back" href="../../reference/plugins.html#PIL.GifImagePlugin.get_interlace">[docs]</a><span class="k">def</span> <span class="nf">get_interlace</span><span class="p">(</span><span class="n">im</span><span class="p">):</span>
<span class="n">interlace</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">"interlace"</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="c1"># workaround for @PIL153</span>
<span class="k">if</span> <span class="nb">min</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="o"><</span> <span class="mi">16</span><span class="p">:</span>
<span class="n">interlace</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">return</span> <span class="n">interlace</span></div>
<span class="k">def</span> <span class="nf">_write_local_header</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">im</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">flags</span><span class="p">):</span>
<span class="n">transparent_color_exists</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">transparency</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">[</span><span class="s2">"transparency"</span><span class="p">]</span>
<span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">transparency</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">transparency</span><span class="p">)</span>
<span class="c1"># optimize the block away if transparent color is not used</span>
<span class="n">transparent_color_exists</span> <span class="o">=</span> <span class="kc">True</span>
<span class="n">used_palette_colors</span> <span class="o">=</span> <span class="n">_get_optimize</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">)</span>
<span class="k">if</span> <span class="n">used_palette_colors</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="c1"># adjust the transparency index after optimize</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">transparency</span> <span class="o">=</span> <span class="n">used_palette_colors</span><span class="o">.</span><span class="n">index</span><span class="p">(</span><span class="n">transparency</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">ValueError</span><span class="p">:</span>
<span class="n">transparent_color_exists</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">if</span> <span class="s2">"duration"</span> <span class="ow">in</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">:</span>
<span class="n">duration</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">[</span><span class="s2">"duration"</span><span class="p">]</span> <span class="o">/</span> <span class="mi">10</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">duration</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">disposal</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</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="s1">'disposal'</span><span class="p">,</span> <span class="mi">0</span><span class="p">))</span>
<span class="k">if</span> <span class="n">transparent_color_exists</span> <span class="ow">or</span> <span class="n">duration</span> <span class="o">!=</span> <span class="mi">0</span> <span class="ow">or</span> <span class="n">disposal</span><span class="p">:</span>
<span class="n">packed_flag</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">if</span> <span class="n">transparent_color_exists</span> <span class="k">else</span> <span class="mi">0</span>
<span class="n">packed_flag</span> <span class="o">|=</span> <span class="n">disposal</span> <span class="o"><<</span> <span class="mi">2</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">transparent_color_exists</span><span class="p">:</span>
<span class="n">transparency</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="sa">b</span><span class="s2">"!"</span> <span class="o">+</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">249</span><span class="p">)</span> <span class="o">+</span> <span class="c1"># extension intro</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">4</span><span class="p">)</span> <span class="o">+</span> <span class="c1"># length</span>
<span class="n">o8</span><span class="p">(</span><span class="n">packed_flag</span><span class="p">)</span> <span class="o">+</span> <span class="c1"># packed fields</span>
<span class="n">o16</span><span class="p">(</span><span class="n">duration</span><span class="p">)</span> <span class="o">+</span> <span class="c1"># duration</span>
<span class="n">o8</span><span class="p">(</span><span class="n">transparency</span><span class="p">)</span> <span class="o">+</span> <span class="c1"># transparency index</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">0</span><span class="p">))</span>
<span class="k">if</span> <span class="s2">"comment"</span> <span class="ow">in</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span> <span class="ow">and</span> \
<span class="mi">1</span> <span class="o"><=</span> <span class="nb">len</span><span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">[</span><span class="s2">"comment"</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="sa">b</span><span class="s2">"!"</span> <span class="o">+</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">254</span><span class="p">))</span> <span class="c1"># extension intro</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">[</span><span class="s2">"comment"</span><span class="p">]),</span> <span class="mi">255</span><span class="p">):</span>
<span class="n">subblock</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">[</span><span class="s2">"comment"</span><span class="p">][</span><span class="n">i</span><span class="p">:</span><span class="n">i</span><span class="o">+</span><span class="mi">255</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">o8</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">subblock</span><span class="p">))</span> <span class="o">+</span>
<span class="n">subblock</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">o8</span><span class="p">(</span><span class="mi">0</span><span class="p">))</span>
<span class="k">if</span> <span class="s2">"loop"</span> <span class="ow">in</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">:</span>
<span class="n">number_of_loops</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">encoderinfo</span><span class="p">[</span><span class="s2">"loop"</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="sa">b</span><span class="s2">"!"</span> <span class="o">+</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="o">+</span> <span class="c1"># extension intro</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="o">+</span>
<span class="sa">b</span><span class="s2">"NETSCAPE2.0"</span> <span class="o">+</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span> <span class="o">+</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="o">+</span>
<span class="n">o16</span><span class="p">(</span><span class="n">number_of_loops</span><span class="p">)</span> <span class="o">+</span> <span class="c1"># number of loops</span>
<span class="n">o8</span><span class="p">(</span><span class="mi">0</span><span class="p">))</span>
<span class="n">include_color_table</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="s1">'include_color_table'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">include_color_table</span><span class="p">:</span>
<span class="n">palette_bytes</span> <span class="o">=</span> <span class="n">_get_palette_bytes</span><span class="p">(</span><span class="n">im</span><span class="p">)</span>
<span class="n">color_table_size</span> <span class="o">=</span> <span class="n">_get_color_table_size</span><span class="p">(</span><span class="n">palette_bytes</span><span class="p">)</span>
<span class="k">if</span> <span class="n">color_table_size</span><span class="p">:</span>
<span class="n">flags</span> <span class="o">=</span> <span class="n">flags</span> <span class="o">|</span> <span class="mi">128</span> <span class="c1"># local color table flag</span>
<span class="n">flags</span> <span class="o">=</span> <span class="n">flags</span> <span class="o">|</span> <span class="n">color_table_size</span>
<span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="sa">b</span><span class="s2">","</span> <span class="o">+</span>
<span class="n">o16</span><span class="p">(</span><span class="n">offset</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">+</span> <span class="c1"># offset</span>
<span class="n">o16</span><span class="p">(</span><span class="n">offset</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span> <span class="o">+</span>
<span class="n">o16</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="o">+</span> <span class="c1"># size</span>
<span class="n">o16</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="o">+</span>
<span class="n">o8</span><span class="p">(</span><span class="n">flags</span><span class="p">))</span> <span class="c1"># flags</span>
<span class="k">if</span> <span class="n">include_color_table</span> <span class="ow">and</span> <span class="n">color_table_size</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">_get_header_palette</span><span class="p">(</span><span class="n">palette_bytes</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">o8</span><span class="p">(</span><span class="mi">8</span><span class="p">))</span> <span class="c1"># bits</span>
<span class="k">def</span> <span class="nf">_save_netpbm</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="c1"># Unused by default.</span>
<span class="c1"># To use, uncomment the register_save call at the end of the file.</span>
<span class="c1">#</span>
<span class="c1"># If you need real GIF compression and/or RGB quantization, you</span>
<span class="c1"># can use the external NETPBM/PBMPLUS utilities. See comments</span>
<span class="c1"># below for information on how to enable this.</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">from</span> <span class="nn">subprocess</span> <span class="k">import</span> <span class="n">Popen</span><span class="p">,</span> <span class="n">check_call</span><span class="p">,</span> <span class="n">PIPE</span><span class="p">,</span> <span class="n">CalledProcessError</span>
<span class="n">file</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">_dump</span><span class="p">()</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</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="o">!=</span> <span class="s2">"RGB"</span><span class="p">:</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">devnull</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span> <span class="k">as</span> <span class="n">devnull</span><span class="p">:</span>
<span class="n">check_call</span><span class="p">([</span><span class="s2">"ppmtogif"</span><span class="p">,</span> <span class="n">file</span><span class="p">],</span> <span class="n">stdout</span><span class="o">=</span><span class="n">f</span><span class="p">,</span> <span class="n">stderr</span><span class="o">=</span><span class="n">devnull</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># Pipe ppmquant output into ppmtogif</span>
<span class="c1"># "ppmquant 256 %s | ppmtogif > %s" % (file, filename)</span>
<span class="n">quant_cmd</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"ppmquant"</span><span class="p">,</span> <span class="s2">"256"</span><span class="p">,</span> <span class="n">file</span><span class="p">]</span>
<span class="n">togif_cmd</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"ppmtogif"</span><span class="p">]</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">devnull</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span> <span class="k">as</span> <span class="n">devnull</span><span class="p">:</span>
<span class="n">quant_proc</span> <span class="o">=</span> <span class="n">Popen</span><span class="p">(</span><span class="n">quant_cmd</span><span class="p">,</span> <span class="n">stdout</span><span class="o">=</span><span class="n">PIPE</span><span class="p">,</span> <span class="n">stderr</span><span class="o">=</span><span class="n">devnull</span><span class="p">)</span>
<span class="n">togif_proc</span> <span class="o">=</span> <span class="n">Popen</span><span class="p">(</span><span class="n">togif_cmd</span><span class="p">,</span> <span class="n">stdin</span><span class="o">=</span><span class="n">quant_proc</span><span class="o">.</span><span class="n">stdout</span><span class="p">,</span>
<span class="n">stdout</span><span class="o">=</span><span class="n">f</span><span class="p">,</span> <span class="n">stderr</span><span class="o">=</span><span class="n">devnull</span><span class="p">)</span>
<span class="c1"># Allow ppmquant to receive SIGPIPE if ppmtogif exits</span>
<span class="n">quant_proc</span><span class="o">.</span><span class="n">stdout</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="n">retcode</span> <span class="o">=</span> <span class="n">quant_proc</span><span class="o">.</span><span class="n">wait</span><span class="p">()</span>
<span class="k">if</span> <span class="n">retcode</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">CalledProcessError</span><span class="p">(</span><span class="n">retcode</span><span class="p">,</span> <span class="n">quant_cmd</span><span class="p">)</span>
<span class="n">retcode</span> <span class="o">=</span> <span class="n">togif_proc</span><span class="o">.</span><span class="n">wait</span><span class="p">()</span>
<span class="k">if</span> <span class="n">retcode</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">CalledProcessError</span><span class="p">(</span><span class="n">retcode</span><span class="p">,</span> <span class="n">togif_cmd</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">unlink</span><span class="p">(</span><span class="n">file</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="c1"># Force optimization so that we can test performance against</span>
<span class="c1"># cases where it took lots of memory and time previously.</span>
<span class="n">_FORCE_OPTIMIZE</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">_get_optimize</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">info</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Palette optimization is a potentially expensive operation.</span>
<span class="sd"> This function determines if the palette should be optimized using</span>
<span class="sd"> some heuristics, then returns the list of palette entries in use.</span>
<span class="sd"> :param im: Image object</span>
<span class="sd"> :param info: encoderinfo</span>
<span class="sd"> :returns: list of indexes of palette entries in use, or None</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"P"</span><span class="p">,</span> <span class="s2">"L"</span><span class="p">)</span> <span class="ow">and</span> <span class="n">info</span> <span class="ow">and</span> <span class="n">info</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"optimize"</span><span class="p">,</span> <span class="mi">0</span><span class="p">):</span>
<span class="c1"># Potentially expensive operation.</span>
<span class="c1"># The palette saves 3 bytes per color not used, but palette</span>
<span class="c1"># lengths are restricted to 3*(2**N) bytes. Max saving would</span>
<span class="c1"># be 768 -> 6 bytes if we went all the way down to 2 colors.</span>
<span class="c1"># * If we're over 128 colors, we can't save any space.</span>
<span class="c1"># * If there aren't any holes, it's not worth collapsing.</span>
<span class="c1"># * If we have a 'large' image, the palette is in the noise.</span>
<span class="c1"># create the new palette if not every color is used</span>
<span class="n">optimise</span> <span class="o">=</span> <span class="n">_FORCE_OPTIMIZE</span> <span class="ow">or</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="o">==</span> <span class="s1">'L'</span>
<span class="k">if</span> <span class="n">optimise</span> <span class="ow">or</span> <span class="n">im</span><span class="o">.</span><span class="n">width</span> <span class="o">*</span> <span class="n">im</span><span class="o">.</span><span class="n">height</span> <span class="o"><</span> <span class="mi">512</span> <span class="o">*</span> <span class="mi">512</span><span class="p">:</span>
<span class="c1"># check which colors are used</span>
<span class="n">used_palette_colors</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">count</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">histogram</span><span class="p">()):</span>
<span class="k">if</span> <span class="n">count</span><span class="p">:</span>
<span class="n">used_palette_colors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">i</span><span class="p">)</span>
<span class="k">if</span> <span class="n">optimise</span> <span class="ow">or</span> <span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">used_palette_colors</span><span class="p">)</span> <span class="o"><=</span> <span class="mi">128</span> <span class="ow">and</span>
<span class="nb">max</span><span class="p">(</span><span class="n">used_palette_colors</span><span class="p">)</span> <span class="o">></span> <span class="nb">len</span><span class="p">(</span><span class="n">used_palette_colors</span><span class="p">)):</span>
<span class="k">return</span> <span class="n">used_palette_colors</span>
<span class="k">def</span> <span class="nf">_get_color_table_size</span><span class="p">(</span><span class="n">palette_bytes</span><span class="p">):</span>
<span class="c1"># calculate the palette size for the header</span>
<span class="kn">import</span> <span class="nn">math</span>
<span class="n">color_table_size</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">math</span><span class="o">.</span><span class="n">ceil</span><span class="p">(</span><span class="n">math</span><span class="o">.</span><span class="n">log</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">palette_bytes</span><span class="p">)</span><span class="o">//</span><span class="mi">3</span><span class="p">,</span> <span class="mi">2</span><span class="p">)))</span><span class="o">-</span><span class="mi">1</span>
<span class="k">if</span> <span class="n">color_table_size</span> <span class="o"><</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">color_table_size</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">return</span> <span class="n">color_table_size</span>
<span class="k">def</span> <span class="nf">_get_header_palette</span><span class="p">(</span><span class="n">palette_bytes</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Returns the palette, null padded to the next power of 2 (*3) bytes</span>
<span class="sd"> suitable for direct inclusion in the GIF header</span>
<span class="sd"> :param palette_bytes: Unpadded palette bytes, in RGBRGB form</span>
<span class="sd"> :returns: Null padded palette</span>
<span class="sd"> """</span>
<span class="n">color_table_size</span> <span class="o">=</span> <span class="n">_get_color_table_size</span><span class="p">(</span><span class="n">palette_bytes</span><span class="p">)</span>
<span class="c1"># add the missing amount of bytes</span>
<span class="c1"># the palette has to be 2<<n in size</span>
<span class="n">actual_target_size_diff</span> <span class="o">=</span> <span class="p">(</span><span class="mi">2</span> <span class="o"><<</span> <span class="n">color_table_size</span><span class="p">)</span> <span class="o">-</span> <span class="nb">len</span><span class="p">(</span><span class="n">palette_bytes</span><span class="p">)</span><span class="o">//</span><span class="mi">3</span>
<span class="k">if</span> <span class="n">actual_target_size_diff</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
<span class="n">palette_bytes</span> <span class="o">+=</span> <span class="n">o8</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span> <span class="o">*</span> <span class="mi">3</span> <span class="o">*</span> <span class="n">actual_target_size_diff</span>
<span class="k">return</span> <span class="n">palette_bytes</span>
<span class="k">def</span> <span class="nf">_get_palette_bytes</span><span class="p">(</span><span class="n">im</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Gets the palette for inclusion in the gif header</span>
<span class="sd"> :param im: Image object</span>
<span class="sd"> :returns: Bytes, len<=768 suitable for inclusion in gif header</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">im</span><span class="o">.</span><span class="n">palette</span><span class="o">.</span><span class="n">palette</span>
<span class="k">def</span> <span class="nf">_get_global_header</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">info</span><span class="p">):</span>
<span class="sd">"""Return a list of strings representing a GIF header"""</span>
<span class="c1"># Header Block</span>
<span class="c1"># http://www.matthewflickinger.com/lab/whatsinagif/bits_and_bytes.asp</span>
<span class="n">version</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">"87a"</span>
<span class="k">for</span> <span class="n">extensionKey</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">"transparency"</span><span class="p">,</span> <span class="s2">"duration"</span><span class="p">,</span> <span class="s2">"loop"</span><span class="p">,</span> <span class="s2">"comment"</span><span class="p">]:</span>
<span class="k">if</span> <span class="n">info</span> <span class="ow">and</span> <span class="n">extensionKey</span> <span class="ow">in</span> <span class="n">info</span><span class="p">:</span>
<span class="k">if</span> <span class="p">((</span><span class="n">extensionKey</span> <span class="o">==</span> <span class="s2">"duration"</span> <span class="ow">and</span> <span class="n">info</span><span class="p">[</span><span class="n">extensionKey</span><span class="p">]</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="ow">or</span>
<span class="p">(</span><span class="n">extensionKey</span> <span class="o">==</span> <span class="s2">"comment"</span> <span class="ow">and</span>
<span class="ow">not</span> <span class="p">(</span><span class="mi">1</span> <span class="o"><=</span> <span class="nb">len</span><span class="p">(</span><span class="n">info</span><span class="p">[</span><span class="n">extensionKey</span><span class="p">])</span> <span class="o"><=</span> <span class="mi">255</span><span class="p">))):</span>
<span class="k">continue</span>
<span class="n">version</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">"89a"</span>
<span class="k">break</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">if</span> <span class="n">im</span><span class="o">.</span><span class="n">info</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"version"</span><span class="p">)</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"89a"</span><span class="p">:</span>
<span class="n">version</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">"89a"</span>
<span class="n">background</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="s2">"background"</span> <span class="ow">in</span> <span class="n">info</span><span class="p">:</span>
<span class="n">background</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">tuple</span><span class="p">):</span>
<span class="c1"># WebPImagePlugin stores an RGBA value in info["background"]</span>
<span class="c1"># So it must be converted to the same format as GifImagePlugin's</span>
<span class="c1"># info["background"] - a global color table index</span>
<span class="n">background</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">palette</span><span class="o">.</span><span class="n">getcolor</span><span class="p">(</span><span class="n">background</span><span class="p">)</span>
<span class="n">palette_bytes</span> <span class="o">=</span> <span class="n">_get_palette_bytes</span><span class="p">(</span><span class="n">im</span><span class="p">)</span>
<span class="n">color_table_size</span> <span class="o">=</span> <span class="n">_get_color_table_size</span><span class="p">(</span><span class="n">palette_bytes</span><span class="p">)</span>
<span class="k">return</span> <span class="p">[</span>
<span class="sa">b</span><span class="s2">"GIF"</span><span class="o">+</span><span class="n">version</span> <span class="o">+</span> <span class="c1"># signature + version</span>
<span class="n">o16</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="o">+</span> <span class="c1"># canvas width</span>
<span class="n">o16</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="c1"># canvas height</span>
<span class="c1"># Logical Screen Descriptor</span>
<span class="c1"># size of global color table + global color table flag</span>
<span class="n">o8</span><span class="p">(</span><span class="n">color_table_size</span> <span class="o">+</span> <span class="mi">128</span><span class="p">),</span> <span class="c1"># packed fields</span>
<span class="c1"># background + reserved/aspect</span>
<span class="n">o8</span><span class="p">(</span><span class="n">background</span><span class="p">)</span> <span class="o">+</span> <span class="n">o8</span><span class="p">(</span><span class="mi">0</span><span class="p">),</span>
<span class="c1"># Global Color Table</span>
<span class="n">_get_header_palette</span><span class="p">(</span><span class="n">palette_bytes</span><span class="p">)</span>
<span class="p">]</span>
<span class="k">def</span> <span class="nf">_write_frame_data</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">im_frame</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">params</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">im_frame</span><span class="o">.</span><span class="n">encoderinfo</span> <span class="o">=</span> <span class="n">params</span>
<span class="c1"># local image header</span>
<span class="n">_write_local_header</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">im_frame</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">ImageFile</span><span class="o">.</span><span class="n">_save</span><span class="p">(</span><span class="n">im_frame</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="p">[(</span><span class="s2">"gif"</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="n">im_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">RAWMODE</span><span class="p">[</span><span class="n">im_frame</span><span class="o">.</span><span class="n">mode</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="sa">b</span><span class="s2">"</span><span class="se">\0</span><span class="s2">"</span><span class="p">)</span> <span class="c1"># end of image data</span>
<span class="k">finally</span><span class="p">:</span>
<span class="k">del</span> <span class="n">im_frame</span><span class="o">.</span><span class="n">encoderinfo</span>
<span class="c1"># --------------------------------------------------------------------</span>
<span class="c1"># Legacy GIF utilities</span>
<div class="viewcode-block" id="getheader"><a class="viewcode-back" href="../../reference/plugins.html#PIL.GifImagePlugin.getheader">[docs]</a><span class="k">def</span> <span class="nf">getheader</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">palette</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">info</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Legacy Method to get Gif data from image.</span>
<span class="sd"> Warning:: May modify image data.</span>
<span class="sd"> :param im: Image object</span>
<span class="sd"> :param palette: bytes object containing the source palette, or ....</span>
<span class="sd"> :param info: encoderinfo</span>
<span class="sd"> :returns: tuple of(list of header items, optimized palette)</span>
<span class="sd"> """</span>
<span class="n">used_palette_colors</span> <span class="o">=</span> <span class="n">_get_optimize</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">info</span><span class="p">)</span>
<span class="k">if</span> <span class="n">info</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">info</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">if</span> <span class="s2">"background"</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">info</span> <span class="ow">and</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">info</span><span class="p">[</span><span class="s2">"background"</span><span class="p">]</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="n">im_mod</span> <span class="o">=</span> <span class="n">_normalize_palette</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">palette</span><span class="p">,</span> <span class="n">info</span><span class="p">)</span>
<span class="n">im</span><span class="o">.</span><span class="n">palette</span> <span class="o">=</span> <span class="n">im_mod</span><span class="o">.</span><span class="n">palette</span>
<span class="n">im</span><span class="o">.</span><span class="n">im</span> <span class="o">=</span> <span class="n">im_mod</span><span class="o">.</span><span class="n">im</span>
<span class="n">header</span> <span class="o">=</span> <span class="n">_get_global_header</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">info</span><span class="p">)</span>
<span class="k">return</span> <span class="n">header</span><span class="p">,</span> <span class="n">used_palette_colors</span></div>
<span class="c1"># To specify duration, add the time in milliseconds to getdata(),</span>
<span class="c1"># e.g. getdata(im_frame, duration=1000)</span>
<div class="viewcode-block" id="getdata"><a class="viewcode-back" href="../../reference/plugins.html#PIL.GifImagePlugin.getdata">[docs]</a><span class="k">def</span> <span class="nf">getdata</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">offset</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="o">**</span><span class="n">params</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Legacy Method</span>
<span class="sd"> Return a list of strings representing this image.</span>
<span class="sd"> The first string is a local image header, the rest contains</span>
<span class="sd"> encoded image data.</span>
<span class="sd"> :param im: Image object</span>
<span class="sd"> :param offset: Tuple of (x, y) pixels. Defaults to (0,0)</span>
<span class="sd"> :param \\**params: E.g. duration or other encoder info parameters</span>
<span class="sd"> :returns: List of Bytes containing gif encoded frame data</span>
<span class="sd"> """</span>
<span class="k">class</span> <span class="nc">Collector</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="n">data</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">def</span> <span class="nf">write</span><span class="p">(</span><span class="bp">self</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">data</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="n">im</span><span class="o">.</span><span class="n">load</span><span class="p">()</span> <span class="c1"># make sure raster data is available</span>
<span class="n">fp</span> <span class="o">=</span> <span class="n">Collector</span><span class="p">()</span>
<span class="n">_write_frame_data</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">im</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">params</span><span class="p">)</span>
<span class="k">return</span> <span class="n">fp</span><span class="o">.</span><span class="n">data</span></div>
<span class="c1"># --------------------------------------------------------------------</span>
<span class="c1"># Registry</span>
<span class="n">Image</span><span class="o">.</span><span class="n">register_open</span><span class="p">(</span><span class="n">GifImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">GifImageFile</span><span class="p">,</span> <span class="n">_accept</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">GifImageFile</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="n">Image</span><span class="o">.</span><span class="n">register_save_all</span><span class="p">(</span><span class="n">GifImageFile</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">GifImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="s2">".gif"</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">GifImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="s2">"image/gif"</span><span class="p">)</span>
<span class="c1">#</span>
<span class="c1"># Uncomment the following line if you wish to use NETPBM/PBMPLUS</span>
<span class="c1"># instead of the built-in "uncompressed" GIF encoder</span>
<span class="c1"># Image.register_save(GifImageFile.format, _save_netpbm)</span>
</pre></div>
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distrib
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Mageia
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armv7hl
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media
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core-updates
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e5936adde9b1ea7ed6dc23c107bda8ab
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