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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** use the contact form at http://qt.digia.com/contact-us.
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** GNU Free Documentation License Usage
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** Documentation License version 1.3 as published by the Free Software
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** this file. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
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/*!
\example demos/deform
\title Vector Deformation
\brief The Vector Deformation demo shows how to use advanced vector techniques to draw text
using a \c QPainterPath.
\image deform-demo.png
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 QPainter::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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