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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
// Based on http://www.geeks3d.com/20100909/shader-library-gaussian-blur-post-processing-filter-in-glsl/
import QtQuick 2.0
Item {
id: root
property bool divider: true
property real dividerValue: 0.5
property ListModel parameters: ListModel {
ListElement {
name: "Radius"
value: 0.5
}
onDataChanged: updateBlurSize()
}
function updateBlurSize()
{
if ((targetHeight > 0) && (targetWidth > 0))
{
verticalBlurSize = 4.0 * parameters.get(0).value / targetHeight;
horizontalBlurSize = 4.0 * parameters.get(0).value / targetWidth;
}
}
property alias targetWidth: verticalShader.targetWidth
property alias targetHeight: verticalShader.targetHeight
property alias source: verticalShader.source
property alias horizontalBlurSize: horizontalShader.blurSize
property alias verticalBlurSize: verticalShader.blurSize
Effect {
id: verticalShader
anchors.fill: parent
dividerValue: parent.dividerValue
property real blurSize: 0.0
onTargetHeightChanged: {
updateBlurSize()
}
onTargetWidthChanged: {
updateBlurSize()
}
fragmentShaderFilename: "gaussianblur_v.fsh"
}
Effect {
id: horizontalShader
anchors.fill: parent
dividerValue: parent.dividerValue
property real blurSize: 0.0
fragmentShaderFilename: "gaussianblur_h.fsh"
source: horizontalShaderSource
ShaderEffectSource {
id: horizontalShaderSource
sourceItem: verticalShader
smooth: true
hideSource: true
}
}
}
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