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<li class="toctree-l1 current"><a class="current reference internal" href="#">Fonts</a><ul>
<li class="toctree-l2"><a class="reference internal" href="#rom-font-conversion">Rom Font Conversion</a></li>
<li class="toctree-l2"><a class="reference internal" href="#true-type-font-conversion">True-Type Font Conversion</a></li>
<li class="toctree-l2"><a class="reference internal" href="#x8-rom-fonts">8x8 Rom Fonts</a></li>
<li class="toctree-l2"><a class="reference internal" href="#x16-rom-fonts">8x16 Rom Fonts</a></li>
<li class="toctree-l2"><a class="reference internal" href="#id1">16x16 Rom Fonts</a></li>
<li class="toctree-l2"><a class="reference internal" href="#x32-rom-fonts">16x32 Rom Fonts</a></li>
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  <section id="fonts">
<h1>Fonts<a class="headerlink" href="#fonts" title="Link to this heading"></a></h1>
<p>Two type of fonts are supported by this driver fixed size bitmap fonts
converted from PC Bios images using the font_from_romfont utility and fixed or proportional fonts converted from True-Type fonts using the font2bitmap utility.</p>
<p>The rom fonts are available in 128 and 256 PC character sets in 8x8, 8x16, 16x6 and 16x32 pixel sizes. They written using the text method.</p>
<p>The True-Type fonts can be converted to any size as long as the widest
character is 256 pixels or less. They are written using the write method.</p>
<p>Pre-compiling the font files to .mpy files will significantly reduce the memory required for the fonts.</p>
<section id="rom-font-conversion">
<h2>Rom Font Conversion<a class="headerlink" href="#rom-font-conversion" title="Link to this heading"></a></h2>
<p>The <cite>utils</cite> directory contains the font_from_romfont.py program used to convert PC BIOS bitmap fonts from the font-bin directory of spacerace’s
<a class="reference external" href="https://github.com/spacerace/romfont">https://github.com/spacerace/romfont</a> repo.</p>
<p>The utility converts all romfont bin files in the specified -input-directory (-i) and writes python font files to the specified -output-directory (-o).</p>
<p>Characters included can be limited by using the -first-char (-f) and -last-char (-l) options.</p>
<p>Example:</p>
<blockquote>
<div><p>font_from_romfont -i font-bin -o fonts -f 32 -l 127</p>
</div></blockquote>
<div class="literal-block-wrapper docutils container" id="id2">
<div class="code-block-caption"><span class="caption-text">Sample converted romfont font module.</span><a class="headerlink" href="#id2" title="Link to this code"></a></div>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="sd">&quot;&quot;&quot;converted from vga_8x8.bin &quot;&quot;&quot;</span>
<span class="linenos"> 2</span>
<span class="linenos"> 3</span><span class="c1"># font width</span>
<span class="linenos"> 4</span><span class="n">WIDTH</span> <span class="o">=</span> <span class="mi">8</span>
<span class="linenos"> 5</span>
<span class="linenos"> 6</span><span class="c1"># font height</span>
<span class="linenos"> 7</span><span class="n">HEIGHT</span> <span class="o">=</span> <span class="mi">8</span>
<span class="linenos"> 8</span>
<span class="linenos"> 9</span><span class="c1"># first character in front</span>
<span class="linenos">10</span><span class="n">FIRST</span> <span class="o">=</span> <span class="mh">0x20</span>
<span class="linenos">11</span>
<span class="linenos">12</span><span class="c1"># last character in font</span>
<span class="linenos">13</span><span class="n">LAST</span> <span class="o">=</span> <span class="mh">0x7f</span>
<span class="linenos">14</span>
<span class="linenos">15</span><span class="c1"># bitmap of each character from FIRST to LAST</span>
<span class="linenos">16</span><span class="n">_FONT</span> <span class="o">=</span>\
<span class="linenos">17</span><span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x00\x00\x00\x00\x00\x00\x00\x00</span><span class="s1">&#39;</span>\
<span class="linenos">18</span><span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x18\x3c\x3c\x18\x18\x00\x18\x00</span><span class="s1">&#39;</span>\
<span class="linenos">19</span><span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x66\x66\x24\x00\x00\x00\x00\x00</span><span class="s1">&#39;</span>\
<span class="linenos">20</span>
<span class="linenos">21</span><span class="o">...</span> <span class="n">many</span> <span class="n">more</span> <span class="n">lines</span> <span class="n">of</span> <span class="n">data</span><span class="o">...</span>
<span class="linenos">22</span>
<span class="linenos">23</span><span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x70\x18\x18\x0e\x18\x18\x70\x00</span><span class="s1">&#39;</span>\
<span class="linenos">24</span><span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x76\xdc\x00\x00\x00\x00\x00\x00</span><span class="s1">&#39;</span>\
<span class="linenos">25</span><span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x00\x10\x38\x6c\xc6\xc6\xfe\x00</span><span class="s1">&#39;</span>\
<span class="linenos">26</span>
<span class="linenos">27</span><span class="n">FONT</span> <span class="o">=</span> <span class="nb">memoryview</span><span class="p">(</span><span class="n">_FONT</span><span class="p">)</span>
</pre></div>
</div>
</div>
</section>
<section id="true-type-font-conversion">
<h2>True-Type Font Conversion<a class="headerlink" href="#true-type-font-conversion" title="Link to this heading"></a></h2>
<p>The <cite>utils</cite> directory contains the <cite>font2bitmap.py</cite> program used to convert True-Type font into bitmap font modules. Use the -h option to see details of the available options.  The <cite>font2bitmap.py</cite> program uses font handling classes from Dan Bader blog post on using freetype
<a class="reference external" href="http://dbader.org/blog/monochrome-font-rendering-with-freetype-and-python">http://dbader.org/blog/monochrome-font-rendering-with-freetype-and-python</a> and
the negative glyph.left fix from peterhinch’s font conversion program
<a class="reference external" href="https://github.com/peterhinch/micropython-font-to-py">https://github.com/peterhinch/micropython-font-to-py</a>.</p>
<p>The utility requires the python freetype module.</p>
<p>Example use:</p>
<ul class="simple">
<li><p>./font2bitmap NotoSans-Regular.ttf 32 -s “0123456789ABCEDF”</p></li>
<li><p>./font2bitmap.py Chango-Regular.ttf 16 -c 0x20-0x7f</p></li>
</ul>
<div class="literal-block-wrapper docutils container" id="id3">
<div class="code-block-caption"><span class="caption-text">Sample converted TrueType font module.</span><a class="headerlink" href="#id3" title="Link to this code"></a></div>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="c1"># -*- coding: utf-8 -*-</span>
<span class="linenos"> 2</span><span class="c1"># Converted from Chango-Regular.ttf using:</span>
<span class="linenos"> 3</span><span class="c1">#     ./font2bitmap.py Chango-Regular.ttf 16 -c 0x20-0x7f</span>
<span class="linenos"> 4</span>
<span class="linenos"> 5</span><span class="c1"># Maps the order of the character data</span>
<span class="linenos"> 6</span><span class="n">MAP</span> <span class="o">=</span> <span class="s2">&quot; !</span><span class="se">\&quot;</span><span class="s2">#$%&amp;&#39;()*+,-./0123456789:;&lt;=&gt;?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[</span><span class="se">\\</span><span class="s2">]^_`abcdefghijklmnopqrstuvwxyz{|}~&quot;</span>
<span class="linenos"> 7</span>
<span class="linenos"> 8</span><span class="c1"># Number of color bits per pixel, currently only 1 is used but could be</span>
<span class="linenos"> 9</span><span class="c1"># increased to support antialiased or smoothed fonts in the future.</span>
<span class="linenos">10</span><span class="n">BPP</span> <span class="o">=</span> <span class="mi">1</span>
<span class="linenos">11</span>
<span class="linenos">12</span><span class="c1"># Font height</span>
<span class="linenos">13</span><span class="n">HEIGHT</span> <span class="o">=</span> <span class="mi">17</span>
<span class="linenos">14</span>
<span class="linenos">15</span><span class="c1"># Font max width</span>
<span class="linenos">16</span><span class="n">MAX_WIDTH</span> <span class="o">=</span> <span class="mi">24</span>
<span class="linenos">17</span>
<span class="linenos">18</span><span class="c1"># one byte per character table of widths in the same order as the MAP string</span>
<span class="linenos">19</span><span class="n">_WIDTHS</span> <span class="o">=</span> \
<span class="linenos">20</span>    <span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x06\x08\x0a\x0e\x0d\x18\x10\x06\x08\x08\x0a\x0d\x06\x08\x06\x0b</span><span class="s1">&#39;</span>\
<span class="linenos">21</span>
<span class="linenos">22</span>    <span class="o">...</span> <span class="n">more</span> <span class="n">lines</span> <span class="n">of</span> <span class="n">data</span><span class="o">...</span>
<span class="linenos">23</span>
<span class="linenos">24</span>    <span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x0d\x0d\x0b\x0a\x0b\x0e\x0c\x12\x0d\x0c\x0b\x09\x06\x09\x0e\x0b</span><span class="s1">&#39;</span>
<span class="linenos">25</span>
<span class="linenos">26</span><span class="c1"># OFFSET_WIDTH bytes per character in the same order as the MAP string</span>
<span class="linenos">27</span><span class="c1"># to the start of each character in bits.</span>
<span class="linenos">28</span><span class="n">OFFSET_WIDTH</span> <span class="o">=</span> <span class="mi">2</span>
<span class="linenos">29</span><span class="n">_OFFSETS</span> <span class="o">=</span> \
<span class="linenos">30</span>    <span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x00\x00\x00\x66\x00\xee\x01\x98\x02\x86\x03\x63\x04\xfb\x06\x0b</span><span class="s1">&#39;</span>\
<span class="linenos">31</span>
<span class="linenos">32</span>    <span class="o">...</span> <span class="n">more</span> <span class="n">lines</span> <span class="n">of</span> <span class="n">data</span><span class="o">...</span>
<span class="linenos">33</span>
<span class="linenos">34</span>    <span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x49\x94\x4a\x71\x4b\x3d\x4b\xf8\x4c\x91\x4c\xf7\x4d\x90\x4e\x7e</span><span class="s1">&#39;</span>
<span class="linenos">35</span>
<span class="linenos">36</span><span class="c1"># character bitmaps per character in the same order as the MAP string.</span>
<span class="linenos">37</span><span class="c1"># Note: character data may not start on byte boundaries</span>
<span class="linenos">38</span><span class="n">_BITMAPS</span> <span class="o">=</span>\
<span class="linenos">39</span>    <span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x61</span><span class="s1">&#39;</span>\
<span class="linenos">40</span>
<span class="linenos">41</span>    <span class="o">...</span> <span class="n">many</span> <span class="n">more</span> <span class="n">lines</span> <span class="n">of</span> <span class="n">data</span><span class="o">...</span>
<span class="linenos">42</span>
<span class="linenos">43</span>    <span class="sa">b</span><span class="s1">&#39;</span><span class="se">\x3d\xe3\xfc\x00\x00\x00\x00\x00</span><span class="s1">&#39;</span>
<span class="linenos">44</span>
<span class="linenos">45</span><span class="n">WIDTHS</span> <span class="o">=</span> <span class="nb">memoryview</span><span class="p">(</span><span class="n">_WIDTHS</span><span class="p">)</span>
<span class="linenos">46</span><span class="n">OFFSETS</span> <span class="o">=</span> <span class="nb">memoryview</span><span class="p">(</span><span class="n">_OFFSETS</span><span class="p">)</span>
<span class="linenos">47</span><span class="n">BITMAPS</span> <span class="o">=</span> <span class="nb">memoryview</span><span class="p">(</span><span class="n">_BITMAPS</span><span class="p">)</span>
</pre></div>
</div>
</div>
</section>
<section id="x8-rom-fonts">
<h2>8x8 Rom Fonts<a class="headerlink" href="#x8-rom-fonts" title="Link to this heading"></a></h2>
<figure class="align-center" id="id4">
<img alt="_images/vga1_8x8.png" src="_images/vga1_8x8.png" />
<figcaption>
<p><span class="caption-text">vga1_8x8.py: 128 Character 8x8 Font</span><a class="headerlink" href="#id4" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
<figure class="align-center" id="id5">
<img alt="_images/vga2_8x8.png" src="_images/vga2_8x8.png" />
<figcaption>
<p><span class="caption-text">vga2_8x8.py: 256 Character 8x8 Font</span><a class="headerlink" href="#id5" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
</section>
<section id="x16-rom-fonts">
<h2>8x16 Rom Fonts<a class="headerlink" href="#x16-rom-fonts" title="Link to this heading"></a></h2>
<figure class="align-center" id="id6">
<img alt="_images/vga1_8x16.png" src="_images/vga1_8x16.png" />
<figcaption>
<p><span class="caption-text">vga1_8x16.py: 128 Character 8x16 Font</span><a class="headerlink" href="#id6" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
<figure class="align-center" id="id7">
<img alt="_images/vga2_8x16.png" src="_images/vga2_8x16.png" />
<figcaption>
<p><span class="caption-text">vga2_8x16.py: 256 Character 8x16 Font</span><a class="headerlink" href="#id7" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
</section>
<section id="id1">
<h2>16x16 Rom Fonts<a class="headerlink" href="#id1" title="Link to this heading"></a></h2>
<figure class="align-center" id="id8">
<img alt="_images/vga1_16x16.png" src="_images/vga1_16x16.png" />
<figcaption>
<p><span class="caption-text">vga1_16x16.py: 128 Character 16x16 Thin Font</span><a class="headerlink" href="#id8" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
<figure class="align-center" id="id9">
<img alt="_images/vga1_bold_16x16.png" src="_images/vga1_bold_16x16.png" />
<figcaption>
<p><span class="caption-text">vga1_bold_16x16.py: 128 Character 16x16 Bold Font</span><a class="headerlink" href="#id9" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
<figure class="align-center" id="id10">
<img alt="_images/vga2_16x16.png" src="_images/vga2_16x16.png" />
<figcaption>
<p><span class="caption-text">vga2_16x16.py: 256 Character 16x16 Thin Font</span><a class="headerlink" href="#id10" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
<figure class="align-center" id="id11">
<img alt="_images/vga2_bold_16x16.png" src="_images/vga2_bold_16x16.png" />
<figcaption>
<p><span class="caption-text">vga2_bold_16x16.py: 256 Character 16x16 Bold Font</span><a class="headerlink" href="#id11" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
</section>
<section id="x32-rom-fonts">
<h2>16x32 Rom Fonts<a class="headerlink" href="#x32-rom-fonts" title="Link to this heading"></a></h2>
<figure class="align-center" id="id12">
<img alt="_images/vga1_16x32.png" src="_images/vga1_16x32.png" />
<figcaption>
<p><span class="caption-text">vga1_16x32.py: 128 Character 16x32 Thin Font</span><a class="headerlink" href="#id12" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
<figure class="align-center" id="id13">
<img alt="_images/vga1_bold_16x32.png" src="_images/vga1_bold_16x32.png" />
<figcaption>
<p><span class="caption-text">vga1_bold_16x32.py: 128 Character 16x32 Bold Font</span><a class="headerlink" href="#id13" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
<figure class="align-center" id="id14">
<img alt="_images/vga2_16x32.png" src="_images/vga2_16x32.png" />
<figcaption>
<p><span class="caption-text">vga2_16x32.py: 256 Character 16x32 Thin Font</span><a class="headerlink" href="#id14" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
<figure class="align-center" id="id15">
<img alt="_images/vga2_bold_16x32.png" src="_images/vga2_bold_16x32.png" />
<figcaption>
<p><span class="caption-text">vga2_bold_16x32.py: 256 Character 16x32 Bold Font</span><a class="headerlink" href="#id15" title="Link to this image"></a></p>
</figcaption>
</figure>
<div class="line-block">
<div class="line"><br /></div>
</div>
</section>
</section>


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