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<h1>Source code for PIL.PsdImagePlugin</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"># Adobe PSD 2.5/3.0 file handling</span>
<span class="c1">#</span>
<span class="c1"># History:</span>
<span class="c1"># 1995-09-01 fl Created</span>
<span class="c1"># 1997-01-03 fl Read most PSD images</span>
<span class="c1"># 1997-01-18 fl Fixed P and CMYK support</span>
<span class="c1"># 2001-10-21 fl Added seek/tell support (for layers)</span>
<span class="c1">#</span>
<span class="c1"># Copyright (c) 1997-2001 by Secret Labs AB.</span>
<span class="c1"># Copyright (c) 1995-2001 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="n">__version__</span> <span class="o">=</span> <span class="s2">"0.4"</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">i16be</span> <span class="k">as</span> <span class="n">i16</span><span class="p">,</span> <span class="n">i32be</span> <span class="k">as</span> <span class="n">i32</span>
<span class="n">MODES</span> <span class="o">=</span> <span class="p">{</span>
<span class="c1"># (photoshop mode, bits) -> (pil mode, required channels)</span>
<span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">):</span> <span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span>
<span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span> <span class="p">(</span><span class="s2">"L"</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span>
<span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span> <span class="p">(</span><span class="s2">"L"</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span>
<span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span> <span class="p">(</span><span class="s2">"P"</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span>
<span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span> <span class="p">(</span><span class="s2">"RGB"</span><span class="p">,</span> <span class="mi">3</span><span class="p">),</span>
<span class="p">(</span><span class="mi">4</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span> <span class="p">(</span><span class="s2">"CMYK"</span><span class="p">,</span> <span class="mi">4</span><span class="p">),</span>
<span class="p">(</span><span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span> <span class="p">(</span><span class="s2">"L"</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span> <span class="c1"># FIXME: multilayer</span>
<span class="p">(</span><span class="mi">8</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span> <span class="p">(</span><span class="s2">"L"</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span> <span class="c1"># duotone</span>
<span class="p">(</span><span class="mi">9</span><span class="p">,</span> <span class="mi">8</span><span class="p">):</span> <span class="p">(</span><span class="s2">"LAB"</span><span class="p">,</span> <span class="mi">3</span><span class="p">)</span>
<span class="p">}</span>
<span class="c1"># --------------------------------------------------------------------.</span>
<span class="c1"># read PSD images</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">4</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"8BPS"</span>
<span class="c1">##</span>
<span class="c1"># Image plugin for Photoshop images.</span>
<div class="viewcode-block" id="PsdImageFile"><a class="viewcode-back" href="../../reference/plugins.html#PIL.PsdImagePlugin.PsdImageFile">[docs]</a><span class="k">class</span> <span class="nc">PsdImageFile</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">"PSD"</span>
<span class="n">format_description</span> <span class="o">=</span> <span class="s2">"Adobe Photoshop"</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="n">read</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="c1">#</span>
<span class="c1"># header</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">read</span><span class="p">(</span><span class="mi">26</span><span class="p">)</span>
<span class="k">if</span> <span class="n">s</span><span class="p">[:</span><span class="mi">4</span><span class="p">]</span> <span class="o">!=</span> <span class="sa">b</span><span class="s2">"8BPS"</span> <span class="ow">or</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="o">!=</span> <span class="mi">1</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">SyntaxError</span><span class="p">(</span><span class="s2">"not a PSD file"</span><span class="p">)</span>
<span class="n">psd_bits</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">22</span><span class="p">:])</span>
<span class="n">psd_channels</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">12</span><span class="p">:])</span>
<span class="n">psd_mode</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">24</span><span class="p">:])</span>
<span class="n">mode</span><span class="p">,</span> <span class="n">channels</span> <span class="o">=</span> <span class="n">MODES</span><span class="p">[(</span><span class="n">psd_mode</span><span class="p">,</span> <span class="n">psd_bits</span><span class="p">)]</span>
<span class="k">if</span> <span class="n">channels</span> <span class="o">></span> <span class="n">psd_channels</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"not enough channels"</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="n">mode</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_size</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">18</span><span class="p">:]),</span> <span class="n">i32</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="c1">#</span>
<span class="c1"># color mode data</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</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="n">size</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">read</span><span class="p">(</span><span class="n">size</span><span class="p">)</span>
<span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="s2">"P"</span> <span class="ow">and</span> <span class="n">size</span> <span class="o">==</span> <span class="mi">768</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;L"</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="c1">#</span>
<span class="c1"># image resources</span>
<span class="bp">self</span><span class="o">.</span><span class="n">resources</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</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="n">size</span><span class="p">:</span>
<span class="c1"># load resources</span>
<span class="n">end</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="o">+</span> <span class="n">size</span>
<span class="k">while</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="o"><</span> <span class="n">end</span><span class="p">:</span>
<span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">)</span> <span class="c1"># signature</span>
<span class="nb">id</span> <span class="o">=</span> <span class="n">i16</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">2</span><span class="p">))</span>
<span class="n">name</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">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="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">name</span><span class="p">)</span> <span class="o">&</span> <span class="mi">1</span><span class="p">):</span>
<span class="n">read</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="c1"># padding</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">read</span><span class="p">(</span><span class="n">i32</span><span class="p">(</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="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">data</span><span class="p">)</span> <span class="o">&</span> <span class="mi">1</span><span class="p">):</span>
<span class="n">read</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="c1"># padding</span>
<span class="bp">self</span><span class="o">.</span><span class="n">resources</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="nb">id</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">data</span><span class="p">))</span>
<span class="k">if</span> <span class="nb">id</span> <span class="o">==</span> <span class="mi">1039</span><span class="p">:</span> <span class="c1"># ICC profile</span>
<span class="bp">self</span><span class="o">.</span><span class="n">info</span><span class="p">[</span><span class="s2">"icc_profile"</span><span class="p">]</span> <span class="o">=</span> <span class="n">data</span>
<span class="c1">#</span>
<span class="c1"># layer and mask information</span>
<span class="bp">self</span><span class="o">.</span><span class="n">layers</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</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="n">size</span><span class="p">:</span>
<span class="n">end</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="o">+</span> <span class="n">size</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</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="n">size</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">layers</span> <span class="o">=</span> <span class="n">_layerinfo</span><span class="p">(</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">seek</span><span class="p">(</span><span class="n">end</span><span class="p">)</span>
<span class="c1">#</span>
<span class="c1"># image descriptor</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tile</span> <span class="o">=</span> <span class="n">_maketile</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="p">,</span> <span class="n">mode</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="n">channels</span><span class="p">)</span>
<span class="c1"># keep the file open</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">frame</span> <span class="o">=</span> <span class="mi">1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_min_frame</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="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">layers</span><span class="p">)</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="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">layers</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span>
<div class="viewcode-block" id="PsdImageFile.seek"><a class="viewcode-back" href="../../reference/plugins.html#PIL.PsdImagePlugin.PsdImageFile.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">layer</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">layer</span><span class="p">):</span>
<span class="k">return</span>
<span class="c1"># seek to given layer (1..max)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">bbox</span><span class="p">,</span> <span class="n">tile</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">layers</span><span class="p">[</span><span class="n">layer</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">mode</span> <span class="o">=</span> <span class="n">mode</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tile</span> <span class="o">=</span> <span class="n">tile</span>
<span class="bp">self</span><span class="o">.</span><span class="n">frame</span> <span class="o">=</span> <span class="n">layer</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">return</span> <span class="n">name</span><span class="p">,</span> <span class="n">bbox</span>
<span class="k">except</span> <span class="ne">IndexError</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">EOFError</span><span class="p">(</span><span class="s2">"no such layer"</span><span class="p">)</span></div>
<div class="viewcode-block" id="PsdImageFile.tell"><a class="viewcode-back" href="../../reference/plugins.html#PIL.PsdImagePlugin.PsdImageFile.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="c1"># return layer number (0=image, 1..max=layers)</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="PsdImageFile.load_prepare"><a class="viewcode-back" href="../../reference/plugins.html#PIL.PsdImagePlugin.PsdImageFile.load_prepare">[docs]</a> <span class="k">def</span> <span class="nf">load_prepare</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># create image memory if necessary</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="ow">or</span>\
<span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">im</span><span class="o">.</span><span class="n">size</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">im</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="bp">self</span><span class="o">.</span><span class="n">mode</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="c1"># create palette (optional)</span>
<span class="k">if</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="p">:</span>
<span class="n">Image</span><span class="o">.</span><span class="n">Image</span><span class="o">.</span><span class="n">load</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span></div></div>
<span class="k">def</span> <span class="nf">_layerinfo</span><span class="p">(</span><span class="n">file</span><span class="p">):</span>
<span class="c1"># read layerinfo block</span>
<span class="n">layers</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">read</span> <span class="o">=</span> <span class="n">file</span><span class="o">.</span><span class="n">read</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="nb">abs</span><span class="p">(</span><span class="n">i16</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">2</span><span class="p">)))):</span>
<span class="c1"># bounding box</span>
<span class="n">y0</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">))</span>
<span class="n">x0</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">))</span>
<span class="n">y1</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">))</span>
<span class="n">x1</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">))</span>
<span class="c1"># image info</span>
<span class="n">info</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">mode</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">types</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">range</span><span class="p">(</span><span class="n">i16</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">2</span><span class="p">))))</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">types</span><span class="p">)</span> <span class="o">></span> <span class="mi">4</span><span class="p">:</span>
<span class="k">continue</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">types</span><span class="p">:</span>
<span class="nb">type</span> <span class="o">=</span> <span class="n">i16</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">2</span><span class="p">))</span>
<span class="k">if</span> <span class="nb">type</span> <span class="o">==</span> <span class="mi">65535</span><span class="p">:</span>
<span class="n">m</span> <span class="o">=</span> <span class="s2">"A"</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">m</span> <span class="o">=</span> <span class="s2">"RGBA"</span><span class="p">[</span><span class="nb">type</span><span class="p">]</span>
<span class="n">mode</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">m</span><span class="p">)</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">))</span>
<span class="n">info</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">m</span><span class="p">,</span> <span class="n">size</span><span class="p">))</span>
<span class="c1"># figure out the image mode</span>
<span class="n">mode</span><span class="o">.</span><span class="n">sort</span><span class="p">()</span>
<span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="p">[</span><span class="s2">"R"</span><span class="p">]:</span>
<span class="n">mode</span> <span class="o">=</span> <span class="s2">"L"</span>
<span class="k">elif</span> <span class="n">mode</span> <span class="o">==</span> <span class="p">[</span><span class="s2">"B"</span><span class="p">,</span> <span class="s2">"G"</span><span class="p">,</span> <span class="s2">"R"</span><span class="p">]:</span>
<span class="n">mode</span> <span class="o">=</span> <span class="s2">"RGB"</span>
<span class="k">elif</span> <span class="n">mode</span> <span class="o">==</span> <span class="p">[</span><span class="s2">"A"</span><span class="p">,</span> <span class="s2">"B"</span><span class="p">,</span> <span class="s2">"G"</span><span class="p">,</span> <span class="s2">"R"</span><span class="p">]:</span>
<span class="n">mode</span> <span class="o">=</span> <span class="s2">"RGBA"</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">mode</span> <span class="o">=</span> <span class="kc">None</span> <span class="c1"># unknown</span>
<span class="c1"># skip over blend flags and extra information</span>
<span class="n">read</span><span class="p">(</span><span class="mi">12</span><span class="p">)</span> <span class="c1"># filler</span>
<span class="n">name</span> <span class="o">=</span> <span class="s2">""</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">))</span> <span class="c1"># length of the extra data field</span>
<span class="n">combined</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="n">size</span><span class="p">:</span>
<span class="n">data_end</span> <span class="o">=</span> <span class="n">file</span><span class="o">.</span><span class="n">tell</span><span class="p">()</span> <span class="o">+</span> <span class="n">size</span>
<span class="n">length</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</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="n">length</span><span class="p">:</span>
<span class="n">file</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">length</span> <span class="o">-</span> <span class="mi">16</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">combined</span> <span class="o">+=</span> <span class="n">length</span> <span class="o">+</span> <span class="mi">4</span>
<span class="n">length</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</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="n">length</span><span class="p">:</span>
<span class="n">file</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">length</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">combined</span> <span class="o">+=</span> <span class="n">length</span> <span class="o">+</span> <span class="mi">4</span>
<span class="n">length</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</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">length</span><span class="p">:</span>
<span class="c1"># Don't know the proper encoding,</span>
<span class="c1"># Latin-1 should be a good guess</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">read</span><span class="p">(</span><span class="n">length</span><span class="p">)</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">'latin-1'</span><span class="p">,</span> <span class="s1">'replace'</span><span class="p">)</span>
<span class="n">combined</span> <span class="o">+=</span> <span class="n">length</span> <span class="o">+</span> <span class="mi">1</span>
<span class="n">file</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">data_end</span><span class="p">)</span>
<span class="n">layers</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">name</span><span class="p">,</span> <span class="n">mode</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="c1"># get tiles</span>
<span class="n">i</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">bbox</span> <span class="ow">in</span> <span class="n">layers</span><span class="p">:</span>
<span class="n">tile</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">m</span> <span class="ow">in</span> <span class="n">mode</span><span class="p">:</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">_maketile</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="n">m</span><span class="p">,</span> <span class="n">bbox</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">if</span> <span class="n">t</span><span class="p">:</span>
<span class="n">tile</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">t</span><span class="p">)</span>
<span class="n">layers</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">bbox</span><span class="p">,</span> <span class="n">tile</span>
<span class="n">i</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">return</span> <span class="n">layers</span>
<span class="k">def</span> <span class="nf">_maketile</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">bbox</span><span class="p">,</span> <span class="n">channels</span><span class="p">):</span>
<span class="n">tile</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">read</span> <span class="o">=</span> <span class="n">file</span><span class="o">.</span><span class="n">read</span>
<span class="n">compression</span> <span class="o">=</span> <span class="n">i16</span><span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="mi">2</span><span class="p">))</span>
<span class="n">xsize</span> <span class="o">=</span> <span class="n">bbox</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">-</span> <span class="n">bbox</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">ysize</span> <span class="o">=</span> <span class="n">bbox</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span> <span class="o">-</span> <span class="n">bbox</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
<span class="n">offset</span> <span class="o">=</span> <span class="n">file</span><span class="o">.</span><span class="n">tell</span><span class="p">()</span>
<span class="k">if</span> <span class="n">compression</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="c1">#</span>
<span class="c1"># raw compression</span>
<span class="n">tile</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">channel</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">channels</span><span class="p">):</span>
<span class="n">layer</span> <span class="o">=</span> <span class="n">mode</span><span class="p">[</span><span class="n">channel</span><span class="p">]</span>
<span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="s2">"CMYK"</span><span class="p">:</span>
<span class="n">layer</span> <span class="o">+=</span> <span class="s2">";I"</span>
<span class="n">tile</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="s2">"raw"</span><span class="p">,</span> <span class="n">bbox</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">layer</span><span class="p">))</span>
<span class="n">offset</span> <span class="o">=</span> <span class="n">offset</span> <span class="o">+</span> <span class="n">xsize</span><span class="o">*</span><span class="n">ysize</span>
<span class="k">elif</span> <span class="n">compression</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
<span class="c1">#</span>
<span class="c1"># packbits compression</span>
<span class="n">i</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">tile</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">bytecount</span> <span class="o">=</span> <span class="n">read</span><span class="p">(</span><span class="n">channels</span> <span class="o">*</span> <span class="n">ysize</span> <span class="o">*</span> <span class="mi">2</span><span class="p">)</span>
<span class="n">offset</span> <span class="o">=</span> <span class="n">file</span><span class="o">.</span><span class="n">tell</span><span class="p">()</span>
<span class="k">for</span> <span class="n">channel</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">channels</span><span class="p">):</span>
<span class="n">layer</span> <span class="o">=</span> <span class="n">mode</span><span class="p">[</span><span class="n">channel</span><span class="p">]</span>
<span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="s2">"CMYK"</span><span class="p">:</span>
<span class="n">layer</span> <span class="o">+=</span> <span class="s2">";I"</span>
<span class="n">tile</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
<span class="p">(</span><span class="s2">"packbits"</span><span class="p">,</span> <span class="n">bbox</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">layer</span><span class="p">)</span>
<span class="p">)</span>
<span class="k">for</span> <span class="n">y</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">ysize</span><span class="p">):</span>
<span class="n">offset</span> <span class="o">=</span> <span class="n">offset</span> <span class="o">+</span> <span class="n">i16</span><span class="p">(</span><span class="n">bytecount</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">2</span><span class="p">])</span>
<span class="n">i</span> <span class="o">+=</span> <span class="mi">2</span>
<span class="n">file</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="n">offset</span><span class="p">)</span>
<span class="k">if</span> <span class="n">offset</span> <span class="o">&</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">read</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="c1"># padding</span>
<span class="k">return</span> <span class="n">tile</span>
<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">PsdImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">PsdImageFile</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_extension</span><span class="p">(</span><span class="n">PsdImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="s2">".psd"</span><span class="p">)</span>
</pre></div>
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