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author | Lars Knoll <lars.knoll@nokia.com> | 2009-03-23 09:18:55 (GMT) |
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committer | Simon Hausmann <simon.hausmann@nokia.com> | 2009-03-23 09:18:55 (GMT) |
commit | e5fcad302d86d316390c6b0f62759a067313e8a9 (patch) | |
tree | c2afbf6f1066b6ce261f14341cf6d310e5595bc1 /doc/src/demos/deform.qdoc | |
download | Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.zip Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.gz Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.bz2 |
Long live Qt 4.5!
Diffstat (limited to 'doc/src/demos/deform.qdoc')
-rw-r--r-- | doc/src/demos/deform.qdoc | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/doc/src/demos/deform.qdoc b/doc/src/demos/deform.qdoc new file mode 100644 index 0000000..2b94e15 --- /dev/null +++ b/doc/src/demos/deform.qdoc @@ -0,0 +1,65 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@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. +*/ |