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<p>Note that FreeType 2 is capable of dealing
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with <em>any</em> kind of glyph images, as long as a
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renderer module is provided for it. The library comes
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- by default with two renderers.</p>
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+ by default with four renderers.</p>
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<table>
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<tr valign=top>
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<p><tt>raster</tt></p>
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</td>
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<td>
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- <p>Supports the conversion of vectorial outlines
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- (described by
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- an <a href="">"../reference/ft2-outline_processing.html#ft_outline"><code>FT_Outline</code></a>
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- object) to <em>monochrome</em> bitmaps.</p>
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+ <p>Convert vectorial outlines
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+ to <em>monochrome</em> bitmaps.</p>
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</td>
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</tr>
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+
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<tr valign=top>
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<td>
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<p><tt>smooth</tt></p>
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</td>
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<td>
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- <p>Supports the conversion of the same outlines to
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+ <p>Convert vectorial outlines to
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<em>anti-aliased</em> pixmaps (using 256 levels of
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gray). Note that this renderer also supports
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- direct span generation, this is, it provides a
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+ direct span generation, that is, it provides a
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hook into the engine so that the application can
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manipulate the rendering results itself, instead
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of letting the rasterizer fill a pixmap.
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tutorial demo file</a> for an example.</p>
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</td>
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</tr>
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+
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+ <tr valign=top>
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+ <td>
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+ <p><tt>sdf</tt></p>
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+ </td>
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+ <td>
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+ <p>Convert vectorial outlines to
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+ 8-bit <em>Signed Distance Field</em> (SDF)
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+ bitmaps.</p>
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+ </td>
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+ </tr>
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+
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+ <tr valign=top>
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+ <td>
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+ <p><tt>bsdf</tt></p>
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+ </td>
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+ <td>
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+ <p>Convert bitmap glyphs to 8-bit <em>Signed
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+ Distance Field</em> (SDF) bitmaps.</p>
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+ </td>
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+ </tr>
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</table>
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+
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+ <p>The <a href="">"https://gitlab.freedesktop.org/freetype/freetype-demos/-/blob/master/src/ftsdf.c"><code>ftsdf</code></a>
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+ FreeType demo program supports both
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+ the <code>sdf</code> and <code>bsdf</code> renderers;
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+ all other (graphical) demo
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+ programs <code>raster</code>
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+ and <code>smooth</code>.</p>
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+
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</li>
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+
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<li>
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<p><em>Font driver</em> modules support one or more
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specific font formats. Here is a list with the most
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hinter, or rely on FreeType's <tt>autofit</tt>
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module for auto-hinting.</p>
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</li>
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+
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<li>
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<p><em>Helper</em> modules are used to hold shared code
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that is often used by several font drivers, or even
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<!-- ************************************************** -->
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<div class="updated">
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- <p>Last update: 13-Feb-2018</p>
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+ <p>Last update: 27-Jan-2022</p>
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</div>
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</div>
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</div>
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