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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in a
** written agreement between you and Nokia.
**
** GNU Free Documentation License
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of this
** file.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\example demos/deform
\title Vector Deformation
This 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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