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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
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  <title>shadereffects.qml Example File | Qt Quick 5.5</title>
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<h1 class="title">shadereffects.qml Example File</h1>
<span class="subtitle">shadereffects/shadereffects.qml</span>
<!-- $$$shadereffects/shadereffects.qml-description -->
<div class="descr"> <a name="details"></a>
<pre class="qml"><span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>

import QtQuick 2.0
import QtQml.Models 2.1
import &quot;content&quot;

<span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> {
    <span class="name">id</span>: <span class="name">root</span>
    <span class="name">width</span>: <span class="number">320</span>
    <span class="name">height</span>: <span class="number">480</span>
    property <span class="type">color</span> <span class="name">col</span>: <span class="string">&quot;lightsteelblue&quot;</span>
    <span class="name">gradient</span>: <span class="name">Gradient</span> {
        <span class="type"><a href="qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">position</span>: <span class="number">0.0</span>; <span class="name">color</span>: <span class="name">Qt</span>.<span class="name">tint</span>(<span class="name">root</span>.<span class="name">col</span>, <span class="string">&quot;#20FFFFFF&quot;</span>) }
        <span class="type"><a href="qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">position</span>: <span class="number">0.1</span>; <span class="name">color</span>: <span class="name">Qt</span>.<span class="name">tint</span>(<span class="name">root</span>.<span class="name">col</span>, <span class="string">&quot;#20AAAAAA&quot;</span>) }
        <span class="type"><a href="qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">position</span>: <span class="number">0.9</span>; <span class="name">color</span>: <span class="name">Qt</span>.<span class="name">tint</span>(<span class="name">root</span>.<span class="name">col</span>, <span class="string">&quot;#20666666&quot;</span>) }
        <span class="type"><a href="qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">position</span>: <span class="number">1.0</span>; <span class="name">color</span>: <span class="name">Qt</span>.<span class="name">tint</span>(<span class="name">root</span>.<span class="name">col</span>, <span class="string">&quot;#20000000&quot;</span>) }
    }

    <span class="type"><a href="qml-qtquick-shadereffectsource.html">ShaderEffectSource</a></span> {
        <span class="name">id</span>: <span class="name">theSource</span>
        <span class="name">sourceItem</span>: <span class="name">theItem</span>
    }

    <span class="keyword">function</span> <span class="name">saturate</span>(<span class="name">x</span>) {
        <span class="keyword">return</span> <span class="name">Math</span>.<span class="name">min</span>(<span class="name">Math</span>.<span class="name">max</span>(<span class="name">x</span>, <span class="number">0</span>), <span class="number">1</span>)
    }

    <span class="keyword">function</span> <span class="name">sliderToColor</span>(<span class="name">x</span>) {
        <span class="keyword">return</span> <span class="name">Qt</span>.<span class="name">rgba</span>(<span class="name">saturate</span>(<span class="name">Math</span>.<span class="name">max</span>(<span class="number">2</span> <span class="operator">-</span> <span class="number">6</span> <span class="operator">*</span> <span class="name">x</span>, <span class="number">6</span> <span class="operator">*</span> <span class="name">x</span> <span class="operator">-</span> <span class="number">4</span>)),
                        <span class="name">saturate</span>(<span class="name">Math</span>.<span class="name">min</span>(<span class="number">6</span> <span class="operator">*</span> <span class="name">x</span>, <span class="number">4</span> <span class="operator">-</span> <span class="number">6</span> <span class="operator">*</span> <span class="name">x</span>)),
                        <span class="name">saturate</span>(<span class="name">Math</span>.<span class="name">min</span>(<span class="number">6</span> <span class="operator">*</span> <span class="name">x</span> <span class="operator">-</span> <span class="number">2</span>, <span class="number">6</span> <span class="operator">-</span> <span class="number">6</span> <span class="operator">*</span> <span class="name">x</span>)))
    }

    <span class="type"><a href="qml-qtquick-grid.html">Grid</a></span> {
        <span class="name">anchors</span>.centerIn: <span class="name">parent</span>
        <span class="name">columns</span>: <span class="number">2</span>

        <span class="type"><a href="qml-qtquick-item.html">Item</a></span> {
            <span class="name">id</span>: <span class="name">theItem</span>
            <span class="name">width</span>: <span class="number">160</span>
            <span class="name">height</span>: <span class="number">160</span>
            <span class="type"><a href="qml-qtquick-listview.html">ListView</a></span> {
                <span class="name">anchors</span>.centerIn: <span class="name">parent</span>
                <span class="name">width</span>: <span class="number">160</span>
                <span class="name">height</span>: <span class="number">140</span>
                <span class="name">clip</span>: <span class="number">true</span>
                <span class="name">snapMode</span>: <span class="name">ListView</span>.<span class="name">SnapOneItem</span>
                <span class="name">model</span>: <span class="name">ObjectModel</span> {
                    <span class="type"><a href="qml-qtquick-text.html">Text</a></span> {
                        <span class="name">width</span>: <span class="number">160</span>
                        <span class="name">height</span>: <span class="number">140</span>
                        <span class="name">horizontalAlignment</span>: <span class="name">Text</span>.<span class="name">AlignHCenter</span>
                        <span class="name">verticalAlignment</span>: <span class="name">Text</span>.<span class="name">AlignVCenter</span>
                        <span class="name">font</span>.pixelSize: <span class="number">120</span>
                        <span class="name">font</span>.family: <span class="string">&quot;Times&quot;</span>
                        <span class="name">color</span>: <span class="string">&quot;blue&quot;</span>
                        <span class="name">text</span>: <span class="string">&quot;Qt&quot;</span>
                    }
                    <span class="type"><a href="qml-qtquick-image.html">Image</a></span> {
                        <span class="name">width</span>: <span class="number">160</span>
                        <span class="name">height</span>: <span class="number">140</span>
                        <span class="name">source</span>: <span class="string">&quot;content/qt-logo.png&quot;</span>
                    }
                    <span class="type"><a href="qml-qtquick-image.html">Image</a></span> {
                        <span class="name">width</span>: <span class="number">160</span>
                        <span class="name">height</span>: <span class="number">140</span>
                        <span class="name">source</span>: <span class="string">&quot;content/face-smile.png&quot;</span>
                    }
                }
            }
        }
        <span class="type"><a href="qml-qtquick-shadereffect.html">ShaderEffect</a></span> {
            <span class="name">width</span>: <span class="number">160</span>
            <span class="name">height</span>: <span class="number">160</span>
            property <span class="type">variant</span> <span class="name">source</span>: <span class="name">theSource</span>
            property <span class="type">real</span> <span class="name">amplitude</span>: <span class="number">0.04</span> <span class="operator">*</span> <span class="name">wobbleSlider</span>.<span class="name">value</span>
            property <span class="type">real</span> <span class="name">frequency</span>: <span class="number">20</span>
            property <span class="type">real</span> <span class="name">time</span>: <span class="number">0</span>
            NumberAnimation on <span class="name">time</span> { <span class="name">loops</span>: <span class="name">Animation</span>.<span class="name">Infinite</span>; <span class="name">from</span>: <span class="number">0</span>; <span class="name">to</span>: <span class="name">Math</span>.<span class="name">PI</span> <span class="operator">*</span> <span class="number">2</span>; <span class="name">duration</span>: <span class="number">600</span> }
            <span class="name">fragmentShader</span>:
                <span class="string">&quot;uniform lowp float qt_Opacity;&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;uniform highp float amplitude;&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;uniform highp float frequency;&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;uniform highp float time;&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;uniform sampler2D source;&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;varying highp vec2 qt_TexCoord0;&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;void main() {&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;    highp vec2 p = sin(time + frequency * qt_TexCoord0);&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;    gl_FragColor = texture2D(source, qt_TexCoord0 + amplitude * vec2(p.y, -p.x)) * qt_Opacity;&quot;</span> <span class="operator">+</span>
                <span class="string">&quot;}&quot;</span>
            <span class="type">Slider</span> {
                <span class="name">id</span>: <span class="name">wobbleSlider</span>
                <span class="name">anchors</span>.left: <span class="name">parent</span>.<span class="name">left</span>
                <span class="name">anchors</span>.right: <span class="name">parent</span>.<span class="name">right</span>
                <span class="name">anchors</span>.bottom: <span class="name">parent</span>.<span class="name">bottom</span>
                <span class="name">height</span>: <span class="number">40</span>
            }
        }
        <span class="type"><a href="qml-qtquick-shadereffect.html">ShaderEffect</a></span> {
            <span class="name">width</span>: <span class="number">160</span>
            <span class="name">height</span>: <span class="number">160</span>
            property <span class="type">variant</span> <span class="name">source</span>: <span class="name">theSource</span>
            property <span class="type">variant</span> <span class="name">shadow</span>: <span class="name">ShaderEffectSource</span> {
                <span class="name">sourceItem</span>: <span class="name">ShaderEffect</span> {
                    <span class="name">width</span>: <span class="name">theItem</span>.<span class="name">width</span>
                    <span class="name">height</span>: <span class="name">theItem</span>.<span class="name">height</span>
                    property <span class="type">variant</span> <span class="name">delta</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="number">0.0</span>, <span class="number">1.0</span> <span class="operator">/</span> <span class="name">height</span>)
                    property <span class="type">variant</span> <span class="name">source</span>: <span class="name">ShaderEffectSource</span> {
                        <span class="name">sourceItem</span>: <span class="name">ShaderEffect</span> {
                            <span class="name">width</span>: <span class="name">theItem</span>.<span class="name">width</span>
                            <span class="name">height</span>: <span class="name">theItem</span>.<span class="name">height</span>
                            property <span class="type">variant</span> <span class="name">delta</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="number">1.0</span> <span class="operator">/</span> <span class="name">width</span>, <span class="number">0.0</span>)
                            property <span class="type">variant</span> <span class="name">source</span>: <span class="name">theSource</span>
                            <span class="name">fragmentShader</span>: <span class="string">&quot;
                                uniform lowp float qt_Opacity;
                                uniform sampler2D source;
                                uniform highp vec2 delta;
                                varying highp vec2 qt_TexCoord0;
                                void main() {
                                    gl_FragColor =(0.0538 * texture2D(source, qt_TexCoord0 - 3.182 * delta)
                                                 + 0.3229 * texture2D(source, qt_TexCoord0 - 1.364 * delta)
                                                 + 0.2466 * texture2D(source, qt_TexCoord0)
                                                 + 0.3229 * texture2D(source, qt_TexCoord0 + 1.364 * delta)
                                                 + 0.0538 * texture2D(source, qt_TexCoord0 + 3.182 * delta)) * qt_Opacity;
                                }&quot;</span>
                        }
                    }
                    <span class="name">fragmentShader</span>: <span class="string">&quot;
                        uniform lowp float qt_Opacity;
                        uniform sampler2D source;
                        uniform highp vec2 delta;
                        varying highp vec2 qt_TexCoord0;
                        void main() {
                            gl_FragColor =(0.0538 * texture2D(source, qt_TexCoord0 - 3.182 * delta)
                                         + 0.3229 * texture2D(source, qt_TexCoord0 - 1.364 * delta)
                                         + 0.2466 * texture2D(source, qt_TexCoord0)
                                         + 0.3229 * texture2D(source, qt_TexCoord0 + 1.364 * delta)
                                         + 0.0538 * texture2D(source, qt_TexCoord0 + 3.182 * delta)) * qt_Opacity;
                        }&quot;</span>
                }
            }
            property <span class="type">real</span> <span class="name">angle</span>: <span class="number">0</span>
            property <span class="type">variant</span> <span class="name">offset</span>: <span class="name">Qt</span>.<span class="name">point</span>(<span class="number">15.0</span> <span class="operator">*</span> <span class="name">Math</span>.<span class="name">cos</span>(<span class="name">angle</span>), <span class="number">15.0</span> <span class="operator">*</span> <span class="name">Math</span>.<span class="name">sin</span>(<span class="name">angle</span>))
            NumberAnimation on <span class="name">angle</span> { <span class="name">loops</span>: <span class="name">Animation</span>.<span class="name">Infinite</span>; <span class="name">from</span>: <span class="number">0</span>; <span class="name">to</span>: <span class="name">Math</span>.<span class="name">PI</span> <span class="operator">*</span> <span class="number">2</span>; <span class="name">duration</span>: <span class="number">6000</span> }
            property <span class="type">variant</span> <span class="name">delta</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="name">offset</span>.<span class="name">x</span> <span class="operator">/</span> <span class="name">width</span>, <span class="name">offset</span>.<span class="name">y</span> <span class="operator">/</span> <span class="name">height</span>)
            property <span class="type">real</span> <span class="name">darkness</span>: <span class="name">shadowSlider</span>.<span class="name">value</span>
            <span class="name">fragmentShader</span>: <span class="string">&quot;
                uniform lowp float qt_Opacity;
                uniform highp vec2 offset;
                uniform sampler2D source;
                uniform sampler2D shadow;
                uniform highp float darkness;
                uniform highp vec2 delta;
                varying highp vec2 qt_TexCoord0;
                void main() {
                    lowp vec4 fg = texture2D(source, qt_TexCoord0);
                    lowp vec4 bg = texture2D(shadow, qt_TexCoord0 + delta);
                    gl_FragColor = (fg + vec4(0., 0., 0., darkness * bg.a) * (1. - fg.a)) * qt_Opacity;
                }&quot;</span>
            <span class="type">Slider</span> {
                <span class="name">id</span>: <span class="name">shadowSlider</span>
                <span class="name">anchors</span>.left: <span class="name">parent</span>.<span class="name">left</span>
                <span class="name">anchors</span>.right: <span class="name">parent</span>.<span class="name">right</span>
                <span class="name">anchors</span>.bottom: <span class="name">parent</span>.<span class="name">bottom</span>
                <span class="name">height</span>: <span class="number">40</span>
            }
        }
        <span class="type"><a href="qml-qtquick-shadereffect.html">ShaderEffect</a></span> {
            <span class="name">width</span>: <span class="number">160</span>
            <span class="name">height</span>: <span class="number">160</span>
            property <span class="type">variant</span> <span class="name">source</span>: <span class="name">theSource</span>
            property <span class="type">variant</span> <span class="name">delta</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="number">0.5</span> <span class="operator">/</span> <span class="name">width</span>, <span class="number">0.5</span> <span class="operator">/</span> <span class="name">height</span>)
            <span class="name">fragmentShader</span>: <span class="string">&quot;
                uniform sampler2D source;
                uniform highp vec2 delta;
                uniform highp float qt_Opacity;
                varying highp vec2 qt_TexCoord0;
                void main() {
                    lowp vec4 tl = texture2D(source, qt_TexCoord0 - delta);
                    lowp vec4 tr = texture2D(source, qt_TexCoord0 + vec2(delta.x, -delta.y));
                    lowp vec4 bl = texture2D(source, qt_TexCoord0 - vec2(delta.x, -delta.y));
                    lowp vec4 br = texture2D(source, qt_TexCoord0 + delta);
                    mediump vec4 gx = (tl + bl) - (tr + br);
                    mediump vec4 gy = (tl + tr) - (bl + br);
                    gl_FragColor.xyz = vec3(0.);
                    gl_FragColor.w = clamp(dot(sqrt(gx * gx + gy * gy), vec4(1.)), 0., 1.) * qt_Opacity;
                }&quot;</span>
        }
        <span class="type"><a href="qml-qtquick-shadereffect.html">ShaderEffect</a></span> {
            <span class="name">width</span>: <span class="number">160</span>
            <span class="name">height</span>: <span class="number">160</span>
            property <span class="type">variant</span> <span class="name">source</span>: <span class="name">theSource</span>
            property <span class="type">color</span> <span class="name">tint</span>: <span class="name">root</span>.<span class="name">sliderToColor</span>(<span class="name">colorizeSlider</span>.<span class="name">value</span>)
            <span class="name">fragmentShader</span>: <span class="string">&quot;
                uniform sampler2D source;
                uniform lowp vec4 tint;
                uniform lowp float qt_Opacity;
                varying highp vec2 qt_TexCoord0;
                void main() {
                    lowp vec4 c = texture2D(source, qt_TexCoord0);
                    lowp float lo = min(min(c.x, c.y), c.z);
                    lowp float hi = max(max(c.x, c.y), c.z);
                    gl_FragColor = qt_Opacity * vec4(mix(vec3(lo), vec3(hi), tint.xyz), c.w);
                }&quot;</span>
            <span class="type">Slider</span> {
                <span class="name">id</span>: <span class="name">colorizeSlider</span>
                <span class="name">anchors</span>.left: <span class="name">parent</span>.<span class="name">left</span>
                <span class="name">anchors</span>.right: <span class="name">parent</span>.<span class="name">right</span>
                <span class="name">anchors</span>.bottom: <span class="name">parent</span>.<span class="name">bottom</span>
                <span class="name">height</span>: <span class="number">40</span>
            }
        }
        <span class="type"><a href="qml-qtquick-shadereffect.html">ShaderEffect</a></span> {
            <span class="name">width</span>: <span class="number">160</span>
            <span class="name">height</span>: <span class="number">160</span>
            property <span class="type">variant</span> <span class="name">source</span>: <span class="name">theSource</span>
            property <span class="type">real</span> <span class="name">bend</span>: <span class="number">0</span>
            property <span class="type">real</span> <span class="name">minimize</span>: <span class="number">0</span>
            property <span class="type">real</span> <span class="name">side</span>: <span class="name">genieSlider</span>.<span class="name">value</span>
            SequentialAnimation on <span class="name">bend</span> {
                <span class="name">loops</span>: <span class="name">Animation</span>.<span class="name">Infinite</span>
                <span class="type"><a href="qml-qtquick-numberanimation.html">NumberAnimation</a></span> { <span class="name">to</span>: <span class="number">1</span>; <span class="name">duration</span>: <span class="number">700</span>; <span class="name">easing</span>.type: <span class="name">Easing</span>.<span class="name">InOutSine</span> }
                <span class="type"><a href="qml-qtquick-pauseanimation.html">PauseAnimation</a></span> { <span class="name">duration</span>: <span class="number">1600</span> }
                <span class="type"><a href="qml-qtquick-numberanimation.html">NumberAnimation</a></span> { <span class="name">to</span>: <span class="number">0</span>; <span class="name">duration</span>: <span class="number">700</span>; <span class="name">easing</span>.type: <span class="name">Easing</span>.<span class="name">InOutSine</span> }
                <span class="type"><a href="qml-qtquick-pauseanimation.html">PauseAnimation</a></span> { <span class="name">duration</span>: <span class="number">1000</span> }
            }
            SequentialAnimation on <span class="name">minimize</span> {
                <span class="name">loops</span>: <span class="name">Animation</span>.<span class="name">Infinite</span>
                <span class="type"><a href="qml-qtquick-pauseanimation.html">PauseAnimation</a></span> { <span class="name">duration</span>: <span class="number">300</span> }
                <span class="type"><a href="qml-qtquick-numberanimation.html">NumberAnimation</a></span> { <span class="name">to</span>: <span class="number">1</span>; <span class="name">duration</span>: <span class="number">700</span>; <span class="name">easing</span>.type: <span class="name">Easing</span>.<span class="name">InOutSine</span> }
                <span class="type"><a href="qml-qtquick-pauseanimation.html">PauseAnimation</a></span> { <span class="name">duration</span>: <span class="number">1000</span> }
                <span class="type"><a href="qml-qtquick-numberanimation.html">NumberAnimation</a></span> { <span class="name">to</span>: <span class="number">0</span>; <span class="name">duration</span>: <span class="number">700</span>; <span class="name">easing</span>.type: <span class="name">Easing</span>.<span class="name">InOutSine</span> }
                <span class="type"><a href="qml-qtquick-pauseanimation.html">PauseAnimation</a></span> { <span class="name">duration</span>: <span class="number">1300</span> }
            }
            <span class="name">mesh</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="number">10</span>, <span class="number">10</span>)
            <span class="name">vertexShader</span>: <span class="string">&quot;
                uniform highp mat4 qt_Matrix;
                uniform highp float bend;
                uniform highp float minimize;
                uniform highp float side;
                uniform highp float width;
                uniform highp float height;
                attribute highp vec4 qt_Vertex;
                attribute highp vec2 qt_MultiTexCoord0;
                varying highp vec2 qt_TexCoord0;
                void main() {
                    qt_TexCoord0 = qt_MultiTexCoord0;
                    highp vec4 pos = qt_Vertex;
                    pos.y = mix(qt_Vertex.y, height, minimize);
                    highp float t = pos.y / height;
                    t = (3. - 2. * t) * t * t;
                    pos.x = mix(qt_Vertex.x, side * width, t * bend);
                    gl_Position = qt_Matrix * pos;
                }&quot;</span>
            <span class="type">Slider</span> {
                <span class="name">id</span>: <span class="name">genieSlider</span>
                <span class="name">anchors</span>.left: <span class="name">parent</span>.<span class="name">left</span>
                <span class="name">anchors</span>.right: <span class="name">parent</span>.<span class="name">right</span>
                <span class="name">anchors</span>.bottom: <span class="name">parent</span>.<span class="name">bottom</span>
                <span class="name">height</span>: <span class="number">40</span>
            }
        }
    }
}</pre>
</div>
<!-- @@@shadereffects/shadereffects.qml -->
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   Documentation contributions included herein are the copyrights of
   their respective owners.<br>    The documentation provided herein is licensed under the terms of the    <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation    License version 1.3</a> as published by the Free Software Foundation.<br>    Qt and respective logos are trademarks of The Qt Company Ltd.     in Finland and/or other countries worldwide. All other trademarks are property
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