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| 16 | <div class="date"> | ||
| 17 | 07/08 2019 | ||
| 18 | <span class="commit-hash"> | ||
| 19 | <a href="https://github.com/nerdypepper/site/blob/master/posts/bye_bye_BDFs.md | ||
| 20 | " style="text-decoration: none"> | ||
| 21 | 7f39c8d | ||
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| 25 | <span class="post-title"> | ||
| 26 | Bye Bye BDFs | ||
| 27 | </span> | ||
| 28 | <div class="post-text"> | ||
| 29 | <p>Glyph Bitmap Distribution Format is no more, as the creators of | ||
| 30 | <a href="https://pango.org">Pango</a>, one of the most widely used text rendering | ||
| 31 | libraries, | ||
| 32 | <a href="https://blogs.gnome.org/mclasen/2019/05/25/pango-future-directions/">announced</a> | ||
| 33 | their plans for Pango 1.44.</p> | ||
| 34 | |||
| 35 | <p>Until recently, Pango used FreeType to draw fonts. They will be moving over | ||
| 36 | to <a href="https://harfbuzz.org">Harfbuzz</a>, an evolution of FreeType.</p> | ||
| 37 | |||
| 38 | <p><em>Why?</em></p> | ||
| 39 | |||
| 40 | <p>In short, FreeType was hard to work with. It required complex logic, and | ||
| 41 | provided no advantage over Harfbuzz (other than being able to fetch | ||
| 42 | opentype metrics with ease).</p> | ||
| 43 | |||
| 44 | <p>Upgrading to Pango v1.44 will break your GTK applications (if you use a | ||
| 45 | <code>bdf</code>/<code>pcf</code> bitmap font). Harfbuzz <em>does</em> support bitmap-only OpenType fonts, | ||
| 46 | <code>otb</code>s. Convert your existing fonts over to <code>otb</code>s using | ||
| 47 | <a href="https://fontforge.github.io">FontForge</a>. It is to be noted that applications | ||
| 48 | such as <code>xterm</code> and <code>rxvt</code> use <code>xft</code> (X FreeType) to render fonts, and will | ||
| 49 | remain unaffected by the update.</p> | ||
| 50 | |||
| 51 | <p>Both <a href="https://github.com/nerdypepper/scientifica">scientifica</a> and | ||
| 52 | <a href="https://github.com/nerdypepper/curie">curie</a> will soon ship with bitmap-only | ||
| 53 | OpenType font formats.</p> | ||
| 54 | |||
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