doc/src/demos/deform.qdoc
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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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
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+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
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+**
+**
+**
+**
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+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \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.
+*/