1/**************************************************************************** 2** 3** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies). 4** Contact: http://www.qt.io/licensing/ 5** 6** This file is part of the Qt Mobility Components. 7** 8** $QT_BEGIN_LICENSE:LGPL21$ 9** Commercial License Usage 10** Licensees holding valid commercial Qt licenses may use this file in 11** accordance with the commercial license agreement provided with the 12** Software or, alternatively, in accordance with the terms contained in 13** a written agreement between you and The Qt Company. For licensing terms 14** and conditions see http://www.qt.io/terms-conditions. For further 15** information use the contact form at http://www.qt.io/contact-us. 16** 17** GNU Lesser General Public License Usage 18** Alternatively, this file may be used under the terms of the GNU Lesser 19** General Public License version 2.1 or version 3 as published by the Free 20** Software Foundation and appearing in the file LICENSE.LGPLv21 and 21** LICENSE.LGPLv3 included in the packaging of this file. Please review the 22** following information to ensure the GNU Lesser General Public License 23** requirements will be met: https://www.gnu.org/licenses/lgpl.html and 24** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 25** 26** As a special exception, The Qt Company gives you certain additional 27** rights. These rights are described in The Qt Company LGPL Exception 28** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29** 30** $QT_END_LICENSE$ 31** 32****************************************************************************/ 33 34// Based on http://kodemongki.blogspot.com/2011/06/kameraku-custom-shader-effects-example.html 35 36uniform float dividerValue; 37const float step_w = 0.0015625; 38const float step_h = 0.0027778; 39 40uniform sampler2D source; 41uniform lowp float qt_Opacity; 42varying vec2 qt_TexCoord0; 43 44vec3 blur() 45{ 46 vec2 uv = qt_TexCoord0.xy; 47 float y = uv.y < 0.4 ? uv.y : 1.0 - uv.y; 48 float dist = 8.0 - 20.0 * y; 49 vec3 acc = vec3(0.0, 0.0, 0.0); 50 for (float y=-2.0; y<=2.0; ++y) { 51 for (float x=-2.0; x<=2.0; ++x) { 52 acc += texture2D(source, vec2(uv.x + dist * x * step_w, uv.y + 0.5 * dist * y * step_h)).rgb; 53 } 54 } 55 return acc / 25.0; 56} 57 58void main() 59{ 60 vec2 uv = qt_TexCoord0.xy; 61 vec3 col; 62 if (uv.x > dividerValue || (uv.y >= 0.4 && uv.y <= 0.6)) 63 col = texture2D(source, uv).rgb; 64 else 65 col = blur(); 66 gl_FragColor = qt_Opacity * vec4(col, 1.0); 67} 68