diff options
Diffstat (limited to 'examples/multimedia/video/qmlvideofx/shaders/ripple.fsh')
-rw-r--r-- | examples/multimedia/video/qmlvideofx/shaders/ripple.fsh | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/examples/multimedia/video/qmlvideofx/shaders/ripple.fsh b/examples/multimedia/video/qmlvideofx/shaders/ripple.fsh new file mode 100644 index 000000000..bb07fc263 --- /dev/null +++ b/examples/multimedia/video/qmlvideofx/shaders/ripple.fsh @@ -0,0 +1,78 @@ +/**************************************************************************** +** +** 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://blog.qt.digia.com/blog/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); +} |