1/**************************************************************************** 2** 3** Copyright (C) 2016 The Qt Company Ltd. 4** Contact: https://www.qt.io/licensing/ 5** 6** This file is part of the Qt Mobility Components. 7** 8** $QT_BEGIN_LICENSE:BSD$ 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 https://www.qt.io/terms-conditions. For further 15** information use the contact form at https://www.qt.io/contact-us. 16** 17** BSD License Usage 18** Alternatively, you may use this file under the terms of the BSD license 19** as follows: 20** 21** "Redistribution and use in source and binary forms, with or without 22** modification, are permitted provided that the following conditions are 23** met: 24** * Redistributions of source code must retain the above copyright 25** notice, this list of conditions and the following disclaimer. 26** * Redistributions in binary form must reproduce the above copyright 27** notice, this list of conditions and the following disclaimer in 28** the documentation and/or other materials provided with the 29** distribution. 30** * Neither the name of The Qt Company Ltd nor the names of its 31** contributors may be used to endorse or promote products derived 32** from this software without specific prior written permission. 33** 34** 35** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 38** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 39** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 41** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 45** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." 46** 47** $QT_END_LICENSE$ 48** 49****************************************************************************/ 50 51// Based on http://www.geeks3d.com/20100909/shader-library-gaussian-blur-post-processing-filter-in-glsl/ 52 53import QtQuick 2.0 54 55Item { 56 id: root 57 property bool divider: true 58 property real dividerValue: 0.5 59 property ListModel parameters: ListModel { 60 ListElement { 61 name: "Radius" 62 value: 0.5 63 } 64 onDataChanged: updateBlurSize() 65 } 66 67 function updateBlurSize() 68 { 69 if ((targetHeight > 0) && (targetWidth > 0)) 70 { 71 verticalBlurSize = 4.0 * parameters.get(0).value / targetHeight; 72 horizontalBlurSize = 4.0 * parameters.get(0).value / targetWidth; 73 } 74 } 75 76 property alias targetWidth: verticalShader.targetWidth 77 property alias targetHeight: verticalShader.targetHeight 78 property alias source: verticalShader.source 79 property alias horizontalBlurSize: horizontalShader.blurSize 80 property alias verticalBlurSize: verticalShader.blurSize 81 82 83 Effect { 84 id: verticalShader 85 anchors.fill: parent 86 dividerValue: parent.dividerValue 87 property real blurSize: 0.0 88 89 onTargetHeightChanged: { 90 updateBlurSize() 91 } 92 onTargetWidthChanged: { 93 updateBlurSize() 94 } 95 fragmentShaderFilename: "gaussianblur_v.fsh" 96 } 97 98 Effect { 99 id: horizontalShader 100 anchors.fill: parent 101 dividerValue: parent.dividerValue 102 property real blurSize: 0.0 103 fragmentShaderFilename: "gaussianblur_h.fsh" 104 source: horizontalShaderSource 105 106 ShaderEffectSource { 107 id: horizontalShaderSource 108 sourceItem: verticalShader 109 smooth: true 110 hideSource: true 111 } 112 } 113} 114 115