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<h2>Vector deformation</h2>
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<p>This demo shows how to use advanced vector techniques to draw text 
using a <code>QPainterPath</code>.</p>

<p>We define a vector deformation field in the shape of a lens and apply
this to all points in a path. This means that what is rendered on
screen is not pixel manipulation, but modified vector representations of
the glyphs themselves. This is visible from the high quality of the
antialiased edges for the deformed glyphs.</p>

<p>To get a fairly