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Diffstat (limited to 'demos/video/qmlvideofx/shaders/glow.fsh')
-rw-r--r-- | demos/video/qmlvideofx/shaders/glow.fsh | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/demos/video/qmlvideofx/shaders/glow.fsh b/demos/video/qmlvideofx/shaders/glow.fsh new file mode 100644 index 0000000000..8c40452d50 --- /dev/null +++ b/demos/video/qmlvideofx/shaders/glow.fsh @@ -0,0 +1,72 @@ +/**************************************************************************** +** +** 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; + +void main() +{ + vec2 uv = qt_TexCoord0.xy; + vec3 t1 = texture2D(source, vec2(uv.x - step_w, uv.y - step_h)).rgb; + vec3 t2 = texture2D(source, vec2(uv.x, uv.y - step_h)).rgb; + vec3 t3 = texture2D(source, vec2(uv.x + step_w, uv.y - step_h)).rgb; + vec3 t4 = texture2D(source, vec2(uv.x - step_w, uv.y)).rgb; + vec3 t5 = texture2D(source, uv).rgb; + vec3 t6 = texture2D(source, vec2(uv.x + step_w, uv.y)).rgb; + vec3 t7 = texture2D(source, vec2(uv.x - step_w, uv.y + step_h)).rgb; + vec3 t8 = texture2D(source, vec2(uv.x, uv.y + step_h)).rgb; + vec3 t9 = texture2D(source, vec2(uv.x + step_w, uv.y + step_h)).rgb; + vec3 xx = t1 + 2.0*t2 + t3 - t7 - 2.0*t8 - t9; + vec3 yy = t1 - t3 + 2.0*t4 - 2.0*t6 + t7 - t9; + vec3 rr = sqrt(xx * xx + yy * yy); + vec3 col = rr * 2.0 * t5; + if (uv.x < dividerValue) + gl_FragColor = qt_Opacity * vec4(col, 1.0); + else + gl_FragColor = qt_Opacity * texture2D(source, uv); +} |