1/**************************************************************************** 2** 3** Copyright (C) 2015 The Qt Company Ltd. 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://www.geeks3d.com/20100909/shader-library-gaussian-blur-post-processing-filter-in-glsl/ 35 36import QtQuick 2.0 37 38Item { 39 id: root 40 property bool divider: true 41 property real dividerValue: 0.5 42 property ListModel parameters: ListModel { 43 ListElement { 44 name: "Radius" 45 value: 0.5 46 } 47 onDataChanged: updateBlurSize() 48 } 49 50 function updateBlurSize() 51 { 52 if ((targetHeight > 0) && (targetWidth > 0)) 53 { 54 verticalBlurSize = 4.0 * parameters.get(0).value / targetHeight; 55 horizontalBlurSize = 4.0 * parameters.get(0).value / targetWidth; 56 } 57 } 58 59 property alias targetWidth: verticalShader.targetWidth 60 property alias targetHeight: verticalShader.targetHeight 61 property alias source: verticalShader.source 62 property alias horizontalBlurSize: horizontalShader.blurSize 63 property alias verticalBlurSize: verticalShader.blurSize 64 65 66 Effect { 67 id: verticalShader 68 anchors.fill: parent 69 dividerValue: parent.dividerValue 70 property real blurSize: 0.0 71 72 onTargetHeightChanged: { 73 updateBlurSize() 74 } 75 onTargetWidthChanged: { 76 updateBlurSize() 77 } 78 fragmentShaderFilename: "gaussianblur_v.fsh" 79 } 80 81 Effect { 82 id: horizontalShader 83 anchors.fill: parent 84 dividerValue: parent.dividerValue 85 property real blurSize: 0.0 86 fragmentShaderFilename: "gaussianblur_h.fsh" 87 source: horizontalShaderSource 88 89 ShaderEffectSource { 90 id: horizontalShaderSource 91 sourceItem: verticalShader 92 smooth: true 93 hideSource: true 94 } 95 } 96} 97 98