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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