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<h1>Source code for PIL.PSDraw</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"># simple postscript graphics interface</span>
<span class="c1">#</span>
<span class="c1"># History:</span>
<span class="c1"># 1996-04-20 fl Created</span>
<span class="c1"># 1999-01-10 fl Added gsave/grestore to image method</span>
<span class="c1"># 2005-05-04 fl Fixed floating point issue in image (from Eric Etheridge)</span>
<span class="c1">#</span>
<span class="c1"># Copyright (c) 1997-2005 by Secret Labs AB. All rights reserved.</span>
<span class="c1"># Copyright (c) 1996 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">EpsImagePlugin</span>
<span class="kn">from</span> <span class="nn">._util</span> <span class="k">import</span> <span class="n">py3</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="c1">##</span>
<span class="c1"># Simple Postscript graphics interface.</span>
<div class="viewcode-block" id="PSDraw"><a class="viewcode-back" href="../../reference/PSDraw.html#PIL.PSDraw.PSDraw">[docs]</a><span class="k">class</span> <span class="nc">PSDraw</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Sets up printing to the given file. If **fp** is omitted,</span>
<span class="sd"> :py:attr:`sys.stdout` is assumed.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fp</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">fp</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">stdout</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="o">=</span> <span class="n">fp</span>
<span class="k">def</span> <span class="nf">_fp_write</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">to_write</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">py3</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="o">==</span> <span class="n">sys</span><span class="o">.</span><span class="n">stdout</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">write</span><span class="p">(</span><span class="n">to_write</span><span class="p">)</span>
<span class="k">else</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">write</span><span class="p">(</span><span class="nb">bytes</span><span class="p">(</span><span class="n">to_write</span><span class="p">,</span> <span class="s1">'UTF-8'</span><span class="p">))</span>
<div class="viewcode-block" id="PSDraw.begin_document"><a class="viewcode-back" href="../../reference/PSDraw.html#PIL.PSDraw.PSDraw.begin_document">[docs]</a> <span class="k">def</span> <span class="nf">begin_document</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="nb">id</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Set up printing of a document. (Write Postscript DSC header.)"""</span>
<span class="c1"># FIXME: incomplete</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"%!PS-Adobe-3.0</span><span class="se">\n</span><span class="s2">"</span>
<span class="s2">"save</span><span class="se">\n</span><span class="s2">"</span>
<span class="s2">"/showpage { } def</span><span class="se">\n</span><span class="s2">"</span>
<span class="s2">"</span><span class="si">%%</span><span class="s2">EndComments</span><span class="se">\n</span><span class="s2">"</span>
<span class="s2">"</span><span class="si">%%</span><span class="s2">BeginDocument</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span>
<span class="c1"># self._fp_write(ERROR_PS) # debugging!</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="n">EDROFF_PS</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="n">VDI_PS</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"</span><span class="si">%%</span><span class="s2">EndProlog</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">isofont</span> <span class="o">=</span> <span class="p">{}</span></div>
<div class="viewcode-block" id="PSDraw.end_document"><a class="viewcode-back" href="../../reference/PSDraw.html#PIL.PSDraw.PSDraw.end_document">[docs]</a> <span class="k">def</span> <span class="nf">end_document</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Ends printing. (Write Postscript DSC footer.)"""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"</span><span class="si">%%</span><span class="s2">EndDocument</span><span class="se">\n</span><span class="s2">"</span>
<span class="s2">"restore showpage</span><span class="se">\n</span><span class="s2">"</span>
<span class="s2">"</span><span class="si">%%</span><span class="s2">End</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">hasattr</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="s2">"flush"</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">flush</span><span class="p">()</span></div>
<div class="viewcode-block" id="PSDraw.setfont"><a class="viewcode-back" href="../../reference/PSDraw.html#PIL.PSDraw.PSDraw.setfont">[docs]</a> <span class="k">def</span> <span class="nf">setfont</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">font</span><span class="p">,</span> <span class="n">size</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Selects which font to use.</span>
<span class="sd"> :param font: A Postscript font name</span>
<span class="sd"> :param size: Size in points.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">font</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">isofont</span><span class="p">:</span>
<span class="c1"># reencode font</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"/PSDraw-</span><span class="si">%s</span><span class="s2"> ISOLatin1Encoding /</span><span class="si">%s</span><span class="s2"> E</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span>
<span class="p">(</span><span class="n">font</span><span class="p">,</span> <span class="n">font</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">isofont</span><span class="p">[</span><span class="n">font</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1"># rough</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"/F0 </span><span class="si">%d</span><span class="s2"> /PSDraw-</span><span class="si">%s</span><span class="s2"> F</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="n">font</span><span class="p">))</span></div>
<div class="viewcode-block" id="PSDraw.line"><a class="viewcode-back" href="../../reference/PSDraw.html#PIL.PSDraw.PSDraw.line">[docs]</a> <span class="k">def</span> <span class="nf">line</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">xy0</span><span class="p">,</span> <span class="n">xy1</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Draws a line between the two points. Coordinates are given in</span>
<span class="sd"> Postscript point coordinates (72 points per inch, (0, 0) is the lower</span>
<span class="sd"> left corner of the page).</span>
<span class="sd"> """</span>
<span class="n">xy</span> <span class="o">=</span> <span class="n">xy0</span> <span class="o">+</span> <span class="n">xy1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"</span><span class="si">%d</span><span class="s2"> </span><span class="si">%d</span><span class="s2"> </span><span class="si">%d</span><span class="s2"> </span><span class="si">%d</span><span class="s2"> Vl</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="n">xy</span><span class="p">)</span></div>
<div class="viewcode-block" id="PSDraw.rectangle"><a class="viewcode-back" href="../../reference/PSDraw.html#PIL.PSDraw.PSDraw.rectangle">[docs]</a> <span class="k">def</span> <span class="nf">rectangle</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">box</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Draws a rectangle.</span>
<span class="sd"> :param box: A 4-tuple of integers whose order and function is currently</span>
<span class="sd"> undocumented.</span>
<span class="sd"> Hint: the tuple is passed into this format string:</span>
<span class="sd"> .. code-block:: python</span>
<span class="sd"> %d %d M %d %d 0 Vr\n</span>
<span class="sd"> """</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"</span><span class="si">%d</span><span class="s2"> </span><span class="si">%d</span><span class="s2"> M </span><span class="si">%d</span><span class="s2"> </span><span class="si">%d</span><span class="s2"> 0 Vr</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="n">box</span><span class="p">)</span></div>
<div class="viewcode-block" id="PSDraw.text"><a class="viewcode-back" href="../../reference/PSDraw.html#PIL.PSDraw.PSDraw.text">[docs]</a> <span class="k">def</span> <span class="nf">text</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">xy</span><span class="p">,</span> <span class="n">text</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Draws text at the given position. You must use</span>
<span class="sd"> :py:meth:`~PIL.PSDraw.PSDraw.setfont` before calling this method.</span>
<span class="sd"> """</span>
<span class="n">text</span> <span class="o">=</span> <span class="s2">"</span><span class="se">\\</span><span class="s2">("</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">text</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">"("</span><span class="p">))</span>
<span class="n">text</span> <span class="o">=</span> <span class="s2">"</span><span class="se">\\</span><span class="s2">)"</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">text</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">")"</span><span class="p">))</span>
<span class="n">xy</span> <span class="o">=</span> <span class="n">xy</span> <span class="o">+</span> <span class="p">(</span><span class="n">text</span><span class="p">,)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"</span><span class="si">%d</span><span class="s2"> </span><span class="si">%d</span><span class="s2"> M (</span><span class="si">%s</span><span class="s2">) S</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="n">xy</span><span class="p">)</span></div>
<div class="viewcode-block" id="PSDraw.image"><a class="viewcode-back" href="../../reference/PSDraw.html#PIL.PSDraw.PSDraw.image">[docs]</a> <span class="k">def</span> <span class="nf">image</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">box</span><span class="p">,</span> <span class="n">im</span><span class="p">,</span> <span class="n">dpi</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Draw a PIL image, centered in the given box."""</span>
<span class="c1"># default resolution depends on mode</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">dpi</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">"1"</span><span class="p">:</span>
<span class="n">dpi</span> <span class="o">=</span> <span class="mi">200</span> <span class="c1"># fax</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">dpi</span> <span class="o">=</span> <span class="mi">100</span> <span class="c1"># greyscale</span>
<span class="c1"># image size (on paper)</span>
<span class="n">x</span> <span class="o">=</span> <span class="nb">float</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="mi">72</span><span class="p">)</span> <span class="o">/</span> <span class="n">dpi</span>
<span class="n">y</span> <span class="o">=</span> <span class="nb">float</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="mi">72</span><span class="p">)</span> <span class="o">/</span> <span class="n">dpi</span>
<span class="c1"># max allowed size</span>
<span class="n">xmax</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">box</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">-</span> <span class="n">box</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="n">ymax</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">box</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span> <span class="o">-</span> <span class="n">box</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
<span class="k">if</span> <span class="n">x</span> <span class="o">></span> <span class="n">xmax</span><span class="p">:</span>
<span class="n">y</span> <span class="o">=</span> <span class="n">y</span> <span class="o">*</span> <span class="n">xmax</span> <span class="o">/</span> <span class="n">x</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">xmax</span>
<span class="k">if</span> <span class="n">y</span> <span class="o">></span> <span class="n">ymax</span><span class="p">:</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">x</span> <span class="o">*</span> <span class="n">ymax</span> <span class="o">/</span> <span class="n">y</span>
<span class="n">y</span> <span class="o">=</span> <span class="n">ymax</span>
<span class="n">dx</span> <span class="o">=</span> <span class="p">(</span><span class="n">xmax</span> <span class="o">-</span> <span class="n">x</span><span class="p">)</span> <span class="o">/</span> <span class="mi">2</span> <span class="o">+</span> <span class="n">box</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">dy</span> <span class="o">=</span> <span class="p">(</span><span class="n">ymax</span> <span class="o">-</span> <span class="n">y</span><span class="p">)</span> <span class="o">/</span> <span class="mi">2</span> <span class="o">+</span> <span class="n">box</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">_fp_write</span><span class="p">(</span><span class="s2">"gsave</span><span class="se">\n</span><span class="si">%f</span><span class="s2"> </span><span class="si">%f</span><span class="s2"> translate</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">dx</span><span class="p">,</span> <span class="n">dy</span><span class="p">))</span>
<span class="k">if</span> <span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</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="c1"># EpsImagePlugin._save prints the image at (0,0,xsize,ysize)</span>
<span class="n">sx</span> <span class="o">=</span> <span class="n">x</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">sy</span> <span class="o">=</span> <span class="n">y</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">1</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"</span><span class="si">%f</span><span class="s2"> </span><span class="si">%f</span><span class="s2"> scale</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">sx</span><span class="p">,</span> <span class="n">sy</span><span class="p">))</span>
<span class="n">EpsImagePlugin</span><span class="o">.</span><span class="n">_save</span><span class="p">(</span><span class="n">im</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="kc">None</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fp_write</span><span class="p">(</span><span class="s2">"</span><span class="se">\n</span><span class="s2">grestore</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span></div></div>
<span class="c1"># --------------------------------------------------------------------</span>
<span class="c1"># Postscript driver</span>
<span class="c1">#</span>
<span class="c1"># EDROFF.PS -- Postscript driver for Edroff 2</span>
<span class="c1">#</span>
<span class="c1"># History:</span>
<span class="c1"># 94-01-25 fl: created (edroff 2.04)</span>
<span class="c1">#</span>
<span class="c1"># Copyright (c) Fredrik Lundh 1994.</span>
<span class="c1">#</span>
<span class="n">EDROFF_PS</span> <span class="o">=</span> <span class="s2">"""</span><span class="se">\</span>
<span class="s2">/S { show } bind def</span>
<span class="s2">/P { moveto show } bind def</span>
<span class="s2">/M { moveto } bind def</span>
<span class="s2">/X { 0 rmoveto } bind def</span>
<span class="s2">/Y { 0 exch rmoveto } bind def</span>
<span class="s2">/E { findfont</span>
<span class="s2"> dup maxlength dict begin</span>
<span class="s2"> {</span>
<span class="s2"> 1 index /FID ne { def } { pop pop } ifelse</span>
<span class="s2"> } forall</span>
<span class="s2"> /Encoding exch def</span>
<span class="s2"> dup /FontName exch def</span>
<span class="s2"> currentdict end definefont pop</span>
<span class="s2">} bind def</span>
<span class="s2">/F { findfont exch scalefont dup setfont</span>
<span class="s2"> [ exch /setfont cvx ] cvx bind def</span>
<span class="s2">} bind def</span>
<span class="s2">"""</span>
<span class="c1">#</span>
<span class="c1"># VDI.PS -- Postscript driver for VDI meta commands</span>
<span class="c1">#</span>
<span class="c1"># History:</span>
<span class="c1"># 94-01-25 fl: created (edroff 2.04)</span>
<span class="c1">#</span>
<span class="c1"># Copyright (c) Fredrik Lundh 1994.</span>
<span class="c1">#</span>
<span class="n">VDI_PS</span> <span class="o">=</span> <span class="s2">"""</span><span class="se">\</span>
<span class="s2">/Vm { moveto } bind def</span>
<span class="s2">/Va { newpath arcn stroke } bind def</span>
<span class="s2">/Vl { moveto lineto stroke } bind def</span>
<span class="s2">/Vc { newpath 0 360 arc closepath } bind def</span>
<span class="s2">/Vr { exch dup 0 rlineto</span>
<span class="s2"> exch dup neg 0 exch rlineto</span>
<span class="s2"> exch neg 0 rlineto</span>
<span class="s2"> 0 exch rlineto</span>
<span class="s2"> 100 div setgray fill 0 setgray } bind def</span>
<span class="s2">/Tm matrix def</span>
<span class="s2">/Ve { Tm currentmatrix pop</span>
<span class="s2"> translate scale newpath 0 0 .5 0 360 arc closepath</span>
<span class="s2"> Tm setmatrix</span>
<span class="s2">} bind def</span>
<span class="s2">/Vf { currentgray exch setgray fill setgray } bind def</span>
<span class="s2">"""</span>
<span class="c1">#</span>
<span class="c1"># ERROR.PS -- Error handler</span>
<span class="c1">#</span>
<span class="c1"># History:</span>
<span class="c1"># 89-11-21 fl: created (pslist 1.10)</span>
<span class="c1">#</span>
<span class="n">ERROR_PS</span> <span class="o">=</span> <span class="s2">"""</span><span class="se">\</span>
<span class="s2">/landscape false def</span>
<span class="s2">/errorBUF 200 string def</span>
<span class="s2">/errorNL { currentpoint 10 sub exch pop 72 exch moveto } def</span>
<span class="s2">errordict begin /handleerror {</span>
<span class="s2"> initmatrix /Courier findfont 10 scalefont setfont</span>
<span class="s2"> newpath 72 720 moveto $error begin /newerror false def</span>
<span class="s2"> (PostScript Error) show errorNL errorNL</span>
<span class="s2"> (Error: ) show</span>
<span class="s2"> /errorname load errorBUF cvs show errorNL errorNL</span>
<span class="s2"> (Command: ) show</span>
<span class="s2"> /command load dup type /stringtype ne { errorBUF cvs } if show</span>
<span class="s2"> errorNL errorNL</span>
<span class="s2"> (VMstatus: ) show</span>
<span class="s2"> vmstatus errorBUF cvs show ( bytes available, ) show</span>
<span class="s2"> errorBUF cvs show ( bytes used at level ) show</span>
<span class="s2"> errorBUF cvs show errorNL errorNL</span>
<span class="s2"> (Operand stargck: ) show errorNL /ostargck load {</span>
<span class="s2"> dup type /stringtype ne { errorBUF cvs } if 72 0 rmoveto show errorNL</span>
<span class="s2"> } forall errorNL</span>
<span class="s2"> (Execution stargck: ) show errorNL /estargck load {</span>
<span class="s2"> dup type /stringtype ne { errorBUF cvs } if 72 0 rmoveto show errorNL</span>
<span class="s2"> } forall</span>
<span class="s2"> end showpage</span>
<span class="s2">} def end</span>
<span class="s2">"""</span>
</pre></div>
</div>
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