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<h1>Source code for PIL.FontFile</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"># base class for raster font file parsers</span>
<span class="c1">#</span>
<span class="c1"># history:</span>
<span class="c1"># 1997-06-05 fl created</span>
<span class="c1"># 1997-08-19 fl restrict image width</span>
<span class="c1">#</span>
<span class="c1"># Copyright (c) 1997-1998 by Secret Labs AB</span>
<span class="c1"># Copyright (c) 1997-1998 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">__future__</span> <span class="k">import</span> <span class="n">print_function</span>
<span class="kn">import</span> <span class="nn">os</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">_binary</span>
<span class="n">WIDTH</span> <span class="o">=</span> <span class="mi">800</span>
<div class="viewcode-block" id="puti16"><a class="viewcode-back" href="../../PIL.html#PIL.FontFile.puti16">[docs]</a><span class="k">def</span> <span class="nf">puti16</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">values</span><span class="p">):</span>
<span class="c1"># write network order (big-endian) 16-bit sequence</span>
<span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">values</span><span class="p">:</span>
<span class="k">if</span> <span class="n">v</span> <span class="o"><</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">v</span> <span class="o">+=</span> <span class="mi">65536</span>
<span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">_binary</span><span class="o">.</span><span class="n">o16be</span><span class="p">(</span><span class="n">v</span><span class="p">))</span></div>
<span class="c1">##</span>
<span class="c1"># Base class for raster font file handlers.</span>
<div class="viewcode-block" id="FontFile"><a class="viewcode-back" href="../../PIL.html#PIL.FontFile.FontFile">[docs]</a><span class="k">class</span> <span class="nc">FontFile</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="n">bitmap</span> <span class="o">=</span> <span class="kc">None</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="bp">self</span><span class="o">.</span><span class="n">info</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">glyph</span> <span class="o">=</span> <span class="p">[</span><span class="kc">None</span><span class="p">]</span> <span class="o">*</span> <span class="mi">256</span>
<span class="k">def</span> <span class="nf">__getitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">ix</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">glyph</span><span class="p">[</span><span class="n">ix</span><span class="p">]</span>
<div class="viewcode-block" id="FontFile.compile"><a class="viewcode-back" href="../../PIL.html#PIL.FontFile.FontFile.compile">[docs]</a> <span class="k">def</span> <span class="nf">compile</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="s2">"Create metrics and bitmap"</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">bitmap</span><span class="p">:</span>
<span class="k">return</span>
<span class="c1"># create bitmap large enough to hold all data</span>
<span class="n">h</span> <span class="o">=</span> <span class="n">w</span> <span class="o">=</span> <span class="n">maxwidth</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">lines</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">for</span> <span class="n">glyph</span> <span class="ow">in</span> <span class="bp">self</span><span class="p">:</span>
<span class="k">if</span> <span class="n">glyph</span><span class="p">:</span>
<span class="n">d</span><span class="p">,</span> <span class="n">dst</span><span class="p">,</span> <span class="n">src</span><span class="p">,</span> <span class="n">im</span> <span class="o">=</span> <span class="n">glyph</span>
<span class="n">h</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="n">h</span><span class="p">,</span> <span class="n">src</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span> <span class="o">-</span> <span class="n">src</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
<span class="n">w</span> <span class="o">=</span> <span class="n">w</span> <span class="o">+</span> <span class="p">(</span><span class="n">src</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">-</span> <span class="n">src</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">if</span> <span class="n">w</span> <span class="o">></span> <span class="n">WIDTH</span><span class="p">:</span>
<span class="n">lines</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="n">w</span> <span class="o">=</span> <span class="p">(</span><span class="n">src</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">-</span> <span class="n">src</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
<span class="n">maxwidth</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="n">maxwidth</span><span class="p">,</span> <span class="n">w</span><span class="p">)</span>
<span class="n">xsize</span> <span class="o">=</span> <span class="n">maxwidth</span>
<span class="n">ysize</span> <span class="o">=</span> <span class="n">lines</span> <span class="o">*</span> <span class="n">h</span>
<span class="k">if</span> <span class="n">xsize</span> <span class="o">==</span> <span class="mi">0</span> <span class="ow">and</span> <span class="n">ysize</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="k">return</span> <span class="s2">""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ysize</span> <span class="o">=</span> <span class="n">h</span>
<span class="c1"># paste glyphs into bitmap</span>
<span class="bp">self</span><span class="o">.</span><span class="n">bitmap</span> <span class="o">=</span> <span class="n">Image</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="p">(</span><span class="n">xsize</span><span class="p">,</span> <span class="n">ysize</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">metrics</span> <span class="o">=</span> <span class="p">[</span><span class="kc">None</span><span class="p">]</span> <span class="o">*</span> <span class="mi">256</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">y</span> <span class="o">=</span> <span class="mi">0</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">256</span><span class="p">):</span>
<span class="n">glyph</span> <span class="o">=</span> <span class="bp">self</span><span class="p">[</span><span class="n">i</span><span class="p">]</span>
<span class="k">if</span> <span class="n">glyph</span><span class="p">:</span>
<span class="n">d</span><span class="p">,</span> <span class="n">dst</span><span class="p">,</span> <span class="n">src</span><span class="p">,</span> <span class="n">im</span> <span class="o">=</span> <span class="n">glyph</span>
<span class="n">xx</span> <span class="o">=</span> <span class="n">src</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">-</span> <span class="n">src</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="c1"># yy = src[3] - src[1]</span>
<span class="n">x0</span><span class="p">,</span> <span class="n">y0</span> <span class="o">=</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">x</span> <span class="o">+</span> <span class="n">xx</span>
<span class="k">if</span> <span class="n">x</span> <span class="o">></span> <span class="n">WIDTH</span><span class="p">:</span>
<span class="n">x</span><span class="p">,</span> <span class="n">y</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">y</span> <span class="o">+</span> <span class="n">h</span>
<span class="n">x0</span><span class="p">,</span> <span class="n">y0</span> <span class="o">=</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">xx</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">src</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="n">x0</span><span class="p">,</span> <span class="n">src</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">+</span> <span class="n">y0</span><span class="p">,</span> <span class="n">src</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">+</span> <span class="n">x0</span><span class="p">,</span> <span class="n">src</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span> <span class="o">+</span> <span class="n">y0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">bitmap</span><span class="o">.</span><span class="n">paste</span><span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">crop</span><span class="p">(</span><span class="n">src</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">metrics</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="n">d</span><span class="p">,</span> <span class="n">dst</span><span class="p">,</span> <span class="n">s</span></div>
<div class="viewcode-block" id="FontFile.save"><a class="viewcode-back" href="../../PIL.html#PIL.FontFile.FontFile.save">[docs]</a> <span class="k">def</span> <span class="nf">save</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="p">):</span>
<span class="s2">"Save font"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">compile</span><span class="p">()</span>
<span class="c1"># font data</span>
<span class="bp">self</span><span class="o">.</span><span class="n">bitmap</span><span class="o">.</span><span class="n">save</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">splitext</span><span class="p">(</span><span class="n">filename</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="s2">".pbm"</span><span class="p">,</span> <span class="s2">"PNG"</span><span class="p">)</span>
<span class="c1"># font metrics</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">path</span><span class="o">.</span><span class="n">splitext</span><span class="p">(</span><span class="n">filename</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="s2">".pil"</span><span class="p">,</span> <span class="s2">"wb"</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</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">"PILfont</span><span class="se">\n</span><span class="s2">"</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="s2">";;;;;;</span><span class="si">%d</span><span class="s2">;</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">ysize</span><span class="p">)</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'ascii'</span><span class="p">))</span> <span class="c1"># HACK!!!</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">"DATA</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span>
<span class="k">for</span> <span class="nb">id</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">m</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">metrics</span><span class="p">[</span><span class="nb">id</span><span class="p">]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">m</span><span class="p">:</span>
<span class="n">puti16</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="p">[</span><span class="mi">0</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">puti16</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">m</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="n">m</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">+</span> <span class="n">m</span><span class="p">[</span><span class="mi">2</span><span class="p">])</span></div></div>
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