399500f87e
Change-Id: Ia8c1c38aba1544603fada8c414cc856f365fd15b Reviewed-by: Akseli Salovaara <akseli.salovaara@digia.com> Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
74 lines
2.9 KiB
GLSL
74 lines
2.9 KiB
GLSL
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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// Based on http://www.geeks3d.com/20091116/shader-library-2d-shockwave-post-processing-filter-glsl/
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uniform float centerX;
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uniform float centerY;
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uniform float dividerValue;
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uniform float granularity;
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uniform float time;
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uniform float weight;
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uniform sampler2D source;
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uniform lowp float qt_Opacity;
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varying vec2 qt_TexCoord0;
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void main()
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{
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vec2 uv = qt_TexCoord0.xy;
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vec2 tc = qt_TexCoord0;
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vec2 center = vec2(centerX, centerY);
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const vec3 shock = vec3(10.0, 1.5, 0.1);
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if (uv.x < dividerValue) {
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float distance = distance(uv, center);
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if ((distance <= (time + shock.z)) &&
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(distance >= (time - shock.z))) {
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float diff = (distance - time);
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float powDiff = 1.0 - pow(abs(diff*shock.x), shock.y*weight);
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float diffTime = diff * powDiff;
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vec2 diffUV = normalize(uv - center);
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tc += (diffUV * diffTime);
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}
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}
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gl_FragColor = qt_Opacity * texture2D(source, tc);
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}
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