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<h1>Source code for PIL.FliImagePlugin</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"># FLI/FLC file handling.</span>
<span class="c1">#</span>
<span class="c1"># History:</span>
<span class="c1"># 95-09-01 fl Created</span>
<span class="c1"># 97-01-03 fl Fixed parser, setup decoder tile</span>
<span class="c1"># 98-07-15 fl Renamed offset attribute to avoid name clash</span>
<span class="c1">#</span>
<span class="c1"># Copyright (c) Secret Labs AB 1997-98.</span>
<span class="c1"># Copyright (c) Fredrik Lundh 1995-97.</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="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">i32le</span> <span class="k">as</span> <span class="n">i32</span><span class="p">,</span> <span class="n">o8</span>
<span class="n">__version__</span> <span class="o">=</span> <span class="s2">"0.2"</span>
<span class="c1">#</span>
<span class="c1"># decoder</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="nb">len</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span> <span class="o">>=</span> <span class="mi">6</span> <span class="ow">and</span> <span class="n">i16</span><span class="p">(</span><span class="n">prefix</span><span class="p">[</span><span class="mi">4</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="mh">0xAF11</span><span class="p">,</span> <span class="mh">0xAF12</span><span class="p">]</span>
<span class="c1">##</span>
<span class="c1"># Image plugin for the FLI/FLC animation format. Use the <b>seek</b></span>
<span class="c1"># method to load individual frames.</span>
<div class="viewcode-block" id="FliImageFile"><a class="viewcode-back" href="../../reference/plugins.html#PIL.FliImagePlugin.FliImageFile">[docs]</a><span class="k">class</span> <span class="nc">FliImageFile</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">"FLI"</span>
<span class="n">format_description</span> <span class="o">=</span> <span class="s2">"Autodesk FLI/FLC Animation"</span>
<span class="n">_close_exclusive_fp_after_loading</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">_open</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># HEAD</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">128</span><span class="p">)</span>
<span class="n">magic</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="mi">6</span><span class="p">])</span>
<span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">magic</span> <span class="ow">in</span> <span class="p">[</span><span class="mh">0xAF11</span><span class="p">,</span> <span class="mh">0xAF12</span><span class="p">]</span> <span class="ow">and</span>
<span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">14</span><span class="p">:</span><span class="mi">16</span><span class="p">])</span> <span class="ow">in</span> <span class="p">[</span><span class="mi">0</span><span class="p">,</span> <span class="mi">3</span><span class="p">]</span> <span class="ow">and</span> <span class="c1"># flags</span>
<span class="n">s</span><span class="p">[</span><span class="mi">20</span><span class="p">:</span><span class="mi">22</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"</span><span class="se">\x00\x00</span><span class="s2">"</span><span class="p">):</span> <span class="c1"># reserved</span>
<span class="k">raise</span> <span class="ne">SyntaxError</span><span class="p">(</span><span class="s2">"not an FLI/FLC file"</span><span class="p">)</span>
<span class="c1"># frames</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__framecount</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="mi">8</span><span class="p">])</span>
<span class="c1"># image characteristics</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="o">=</span> <span class="s2">"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">8</span><span class="p">:</span><span class="mi">10</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">10</span><span class="p">:</span><span class="mi">12</span><span class="p">])</span>
<span class="c1"># animation speed</span>
<span class="n">duration</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">16</span><span class="p">:</span><span class="mi">20</span><span class="p">])</span>
<span class="k">if</span> <span class="n">magic</span> <span class="o">==</span> <span class="mh">0xAF11</span><span class="p">:</span>
<span class="n">duration</span> <span class="o">=</span> <span class="p">(</span><span class="n">duration</span> <span class="o">*</span> <span class="mi">1000</span><span class="p">)</span> <span class="o">//</span> <span class="mi">70</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"duration"</span><span class="p">]</span> <span class="o">=</span> <span class="n">duration</span>
<span class="c1"># look for palette</span>
<span class="n">palette</span> <span class="o">=</span> <span class="p">[(</span><span class="n">a</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">a</span><span class="p">)</span> <span class="k">for</span> <span class="n">a</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">256</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">16</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="mi">128</span>
<span class="k">if</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="mi">6</span><span class="p">])</span> <span class="o">==</span> <span class="mh">0xF100</span><span class="p">:</span>
<span class="c1"># prefix chunk; ignore it</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">__offset</span> <span class="o">+</span> <span class="n">i32</span><span class="p">(</span><span class="n">s</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">16</span><span class="p">)</span>
<span class="k">if</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="mi">6</span><span class="p">])</span> <span class="o">==</span> <span class="mh">0xF1FA</span><span class="p">:</span>
<span class="c1"># look for palette chunk</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">6</span><span class="p">)</span>
<span class="k">if</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="mi">6</span><span class="p">])</span> <span class="o">==</span> <span class="mi">11</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_palette</span><span class="p">(</span><span class="n">palette</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span>
<span class="k">elif</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="mi">6</span><span class="p">])</span> <span class="o">==</span> <span class="mi">4</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_palette</span><span class="p">(</span><span class="n">palette</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">palette</span> <span class="o">=</span> <span class="p">[</span><span class="n">o8</span><span class="p">(</span><span class="n">r</span><span class="p">)</span><span class="o">+</span><span class="n">o8</span><span class="p">(</span><span class="n">g</span><span class="p">)</span><span class="o">+</span><span class="n">o8</span><span class="p">(</span><span class="n">b</span><span class="p">)</span> <span class="k">for</span> <span class="p">(</span><span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span><span class="p">)</span> <span class="ow">in</span> <span class="n">palette</span><span class="p">]</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="sa">b</span><span class="s2">""</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">palette</span><span class="p">))</span>
<span class="c1"># set things up to decode first frame</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="bp">self</span><span class="o">.</span><span class="n">fp</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">seek</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_palette</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">palette</span><span class="p">,</span> <span class="n">shift</span><span class="p">):</span>
<span class="c1"># load palette</span>
<span class="n">i</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">for</span> <span class="n">e</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">i16</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">2</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">2</span><span class="p">)</span>
<span class="n">i</span> <span class="o">=</span> <span class="n">i</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">0</span><span class="p">])</span>
<span class="n">n</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">1</span><span class="p">])</span>
<span class="k">if</span> <span class="n">n</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">n</span> <span class="o">=</span> <span class="mi">256</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="n">n</span> <span class="o">*</span> <span class="mi">3</span><span class="p">)</span>
<span class="k">for</span> <span class="n">n</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">s</span><span class="p">),</span> <span class="mi">3</span><span class="p">):</span>
<span class="n">r</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="n">n</span><span class="p">])</span> <span class="o"><<</span> <span class="n">shift</span>
<span class="n">g</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="n">n</span><span class="o">+</span><span class="mi">1</span><span class="p">])</span> <span class="o"><<</span> <span class="n">shift</span>
<span class="n">b</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="n">n</span><span class="o">+</span><span class="mi">2</span><span class="p">])</span> <span class="o"><<</span> <span class="n">shift</span>
<span class="n">palette</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span><span class="p">)</span>
<span class="n">i</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">n_frames</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__framecount</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">is_animated</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__framecount</span> <span class="o">></span> <span class="mi">1</span>
<div class="viewcode-block" id="FliImageFile.seek"><a class="viewcode-back" href="../../reference/plugins.html#PIL.FliImagePlugin.FliImageFile.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="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="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></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="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">__offset</span> <span class="o">=</span> <span class="mi">128</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># ensure that the previous frame was loaded</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="c1"># move to next frame</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="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="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">4</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">s</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">EOFError</span>
<span class="n">framesize</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">decodermaxblock</span> <span class="o">=</span> <span class="n">framesize</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">"fli"</span><span class="p">,</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span><span class="o">+</span><span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">__offset</span><span class="p">,</span> <span class="kc">None</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="n">framesize</span>
<div class="viewcode-block" id="FliImageFile.tell"><a class="viewcode-back" href="../../reference/plugins.html#PIL.FliImagePlugin.FliImageFile.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>
<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"># registry</span>
<span class="n">Image</span><span class="o">.</span><span class="n">register_open</span><span class="p">(</span><span class="n">FliImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">FliImageFile</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_extensions</span><span class="p">(</span><span class="n">FliImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="p">[</span><span class="s2">".fli"</span><span class="p">,</span> <span class="s2">".flc"</span><span class="p">])</span>
</pre></div>
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