diff options
Diffstat (limited to 'demos/video/qmlvideofx/shaders/ripple.fsh')
-rw-r--r-- | demos/video/qmlvideofx/shaders/ripple.fsh | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/demos/video/qmlvideofx/shaders/ripple.fsh b/demos/video/qmlvideofx/shaders/ripple.fsh new file mode 100644 index 0000000000..bd79c763b6 --- /dev/null +++ b/demos/video/qmlvideofx/shaders/ripple.fsh @@ -0,0 +1,78 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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 1.1, 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// 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); +} |