diff -r 41300fa6a67c -r f7bc934e204c util/demos/deform/pathdeform.html --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/util/demos/deform/pathdeform.html Wed Mar 31 11:06:36 2010 +0300 @@ -0,0 +1,24 @@ + + +

Vector deformation

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This demo shows how to use advanced vector techniques to draw text +using a QPainterPath.

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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.

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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.

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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.

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