diff options
Diffstat (limited to 'demos/video/qmlvideofx/shaders/tiltshift.fsh')
-rw-r--r-- | demos/video/qmlvideofx/shaders/tiltshift.fsh | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/demos/video/qmlvideofx/shaders/tiltshift.fsh b/demos/video/qmlvideofx/shaders/tiltshift.fsh new file mode 100644 index 0000000000..5f52d42ec4 --- /dev/null +++ b/demos/video/qmlvideofx/shaders/tiltshift.fsh @@ -0,0 +1,75 @@ +/**************************************************************************** +** +** 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://kodemongki.blogspot.com/2011/06/kameraku-custom-shader-effects-example.html + +uniform float dividerValue; +const float step_w = 0.0015625; +const float step_h = 0.0027778; + +uniform sampler2D source; +uniform lowp float qt_Opacity; +varying vec2 qt_TexCoord0; + +vec3 blur() +{ + vec2 uv = qt_TexCoord0.xy; + float y = uv.y < 0.4 ? uv.y : 1.0 - uv.y; + float dist = 8.0 - 20.0 * y; + vec3 acc = vec3(0.0, 0.0, 0.0); + for (float y=-2.0; y<=2.0; ++y) { + for (float x=-2.0; x<=2.0; ++x) { + acc += texture2D(source, vec2(uv.x + dist * x * step_w, uv.y + 0.5 * dist * y * step_h)).rgb; + } + } + return acc / 25.0; +} + +void main() +{ + vec2 uv = qt_TexCoord0.xy; + vec3 col; + if (uv.x > dividerValue || (uv.y >= 0.4 && uv.y <= 0.6)) + col = texture2D(source, uv).rgb; + else + col = blur(); + gl_FragColor = qt_Opacity * vec4(col, 1.0); +} |