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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 Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// Based on http://labs.qt.nokia.com/2011/03/22/the-convenient-power-of-qml-scene-graph/
+
+uniform float dividerValue;
+uniform float targetWidth;
+uniform float targetHeight;
+uniform float time;
+
+uniform sampler2D source;
+uniform lowp float qt_Opacity;
+varying vec2 qt_TexCoord0;
+
+const float PI = 3.1415926535;
+const int ITER = 7;
+const float RATE = 0.1;
+uniform float amplitude;
+uniform float n;
+
+void main()
+{
+ vec2 uv = qt_TexCoord0.xy;
+ vec2 tc = uv;
+ vec2 p = vec2(-1.0 + 2.0 * gl_FragCoord.x / targetWidth, -(-1.0 + 2.0 * gl_FragCoord.y / targetHeight));
+ float diffx = 0.0;
+ float diffy = 0.0;
+ vec4 col;
+ if (uv.x < dividerValue) {
+ for (int i=0; i<ITER; ++i) {
+ float theta = float(i) * PI / float(ITER);
+ vec2 r = vec2(cos(theta) * p.x + sin(theta) * p.y, -1.0 * sin(theta) * p.x + cos(theta) * p.y);
+ float diff = (sin(2.0 * PI * n * (r.y + time * RATE)) + 1.0) / 2.0;
+ diffx += diff * sin(theta);
+ diffy += diff * cos(theta);
+ }
+ tc = 0.5*(vec2(1.0,1.0) + p) + amplitude * vec2(diffx, diffy);
+ }
+ gl_FragColor = qt_Opacity * texture2D(source, tc);
+}