This demo shows how to use advanced vector techniques to draw text
+using a QPainterPath.
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.
+ +To get a fairly complex path we allow the user to type in text and
+convert the text to paths. This is done using the
+QPainterPath::addText() function.
The lens is drawn using a single call to drawEllipse(), using
+a QRadialGradient to fill it with a specialized color table,
+giving the effect of the Sun's reflection and a drop shadow. The lens
+is cached as a pixmap for better performance.