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<title>HueSaturation QML Type | Qt Graphical Effects 5.9</title>
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<td >Qt 5.9</td><td ><a href="qtgraphicaleffects-index.html">Qt Graphical Effects</a></td><td ><a href="graphicaleffects.html">QML Types</a></td><td >HueSaturation QML Type</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.5 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
<li class="level2"><a href="#example">Example</a></li>
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<h1 class="title">HueSaturation QML Type</h1>
<span class="subtitle"></span>
<!-- $$$HueSaturation-brief -->
<p>Alters the source item colors in the HSL color space. <a href="#details">More...</a></p>
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<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtGraphicalEffects 1.0</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> QtGraphicalEffects 1.0</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <p><a href="../qtquick/qml-qtquick-item.html">Item</a></p>
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<li><a href="qml-qtgraphicaleffects-huesaturation-members.html">List of all members, including inherited members</a></li>
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<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-huesaturation.html#cached-prop">cached</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-huesaturation.html#hue-prop">hue</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-huesaturation.html#lightness-prop">lightness</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-huesaturation.html#saturation-prop">saturation</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-huesaturation.html#source-prop">source</a></b></b> : variant</li>
</ul>
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<a name="details"></a>
<h2 id="details">Detailed Description</h2>
<p><a href="qml-qtgraphicaleffects-huesaturation.html">HueSaturation</a> is similar to the <a href="qml-qtgraphicaleffects-colorize.html">Colorize</a> effect, but the hue and saturation property values are handled differently. The <a href="qml-qtgraphicaleffects-huesaturation.html">HueSaturation</a> effect always shifts the hue, saturation, and lightness from the original, instead of setting them.</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Source</th><th >Effect applied</th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/Original_bug.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/HueSaturation_bug.png" alt="" /></p></td></tr>
</table></div>
<p><b>Note: </b>This effect is available when running with OpenGL.</p><a name="example"></a>
<h2 id="example">Example</h2>
<p>The following example shows how to apply the effect.</p>
<pre class="qml">
import QtQuick 2.0
import QtGraphicalEffects 1.0
<span class="type"><a href="../qtquick/qml-qtquick-item.html">Item</a></span> {
<span class="name">width</span>: <span class="number">300</span>
<span class="name">height</span>: <span class="number">300</span>
<span class="type"><a href="../qtquick/qml-qtquick-image.html">Image</a></span> {
<span class="name">id</span>: <span class="name">bug</span>
<span class="name">source</span>: <span class="string">"images/bug.jpg"</span>
<span class="name">sourceSize</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="name">parent</span>.<span class="name">width</span>, <span class="name">parent</span>.<span class="name">height</span>)
<span class="name">smooth</span>: <span class="number">true</span>
<span class="name">visible</span>: <span class="number">false</span>
}
<span class="type"><a href="qml-qtgraphicaleffects-huesaturation.html">HueSaturation</a></span> {
<span class="name">anchors</span>.fill: <span class="name">bug</span>
<span class="name">source</span>: <span class="name">bug</span>
<span class="name">hue</span>: -<span class="number">0.3</span>
<span class="name">saturation</span>: <span class="number">0.5</span>
<span class="name">lightness</span>: -<span class="number">0.1</span>
}
}
</pre>
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<h2>Property Documentation</h2>
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<a name="cached-prop"></a><span class="name">cached</span> : <span class="type">bool</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property allows the effect output pixels to be cached in order to improve the rendering performance.</p>
<p>Every time the source or effect properties are changed, the pixels in the cache must be updated. Memory consumption is increased, because an extra buffer of memory is required for storing the effect output.</p>
<p>It is recommended to disable the cache when the source or the effect properties are animated.</p>
<p>By default, the property is set to <code>false</code>.</p>
</div></div><!-- @@@cached -->
<br/>
<!-- $$$hue -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="hue-prop">
<td class="tblQmlPropNode"><p>
<a name="hue-prop"></a><span class="name">hue</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property defines the hue value which is added to the source hue value.</p>
<p>The value ranges from -1.0 (decrease) to 1.0 (increase). By default, the property is set to <code>0.0</code> (no change).</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Output examples with different hue values</th><th ></th><th ></th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/HueSaturation_hue1.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/HueSaturation_hue2.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/HueSaturation_hue3.png" alt="" /></p></td></tr>
<tr valign="top" class="even"><td ><b> hue: -0.3 </b></td><td ><b> hue: 0.0 </b></td><td ><b> hue: 0.3 </b></td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-huesaturation.html#saturation-prop">saturation</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#saturation-prop">saturation</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#saturation-prop">saturation</a>: 0</td></tr>
<tr valign="top" class="even"><td ><a href="qml-qtgraphicaleffects-huesaturation.html#lightness-prop">lightness</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#lightness-prop">lightness</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#lightness-prop">lightness</a>: 0</td></tr>
</table></div>
</div></div><!-- @@@hue -->
<br/>
<!-- $$$lightness -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="lightness-prop">
<td class="tblQmlPropNode"><p>
<a name="lightness-prop"></a><span class="name">lightness</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property defines the lightness value which is added to the source saturation value.</p>
<p>The value ranges from -1.0 (decrease) to 1.0 (increase). By default, the property is set to <code>0.0</code> (no change).</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Output examples with different lightness values</th><th ></th><th ></th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/HueSaturation_lightness1.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/HueSaturation_lightness2.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/HueSaturation_lightness3.png" alt="" /></p></td></tr>
<tr valign="top" class="even"><td ><b> lightness: -0.5 </b></td><td ><b> lightness: 0.0 </b></td><td ><b> lightness: 0.5 </b></td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-huesaturation.html#hue-prop">hue</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#hue-prop">hue</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#hue-prop">hue</a>: 0</td></tr>
<tr valign="top" class="even"><td ><a href="qml-qtgraphicaleffects-huesaturation.html#saturation-prop">saturation</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#saturation-prop">saturation</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#saturation-prop">saturation</a>: 0</td></tr>
</table></div>
</div></div><!-- @@@lightness -->
<br/>
<!-- $$$saturation -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="saturation-prop">
<td class="tblQmlPropNode"><p>
<a name="saturation-prop"></a><span class="name">saturation</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property defines the saturation value value which is added to the source saturation value.</p>
<p>The value ranges from -1.0 (decrease) to 1.0 (increase). By default, the property is set to <code>0.0</code> (no change).</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Output examples with different saturation values</th><th ></th><th ></th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/HueSaturation_saturation1.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/HueSaturation_saturation2.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/HueSaturation_saturation3.png" alt="" /></p></td></tr>
<tr valign="top" class="even"><td ><b> saturation: -0.8 </b></td><td ><b> saturation: 0.0 </b></td><td ><b> saturation: 1.0 </b></td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-huesaturation.html#hue-prop">hue</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#hue-prop">hue</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#hue-prop">hue</a>: 0</td></tr>
<tr valign="top" class="even"><td ><a href="qml-qtgraphicaleffects-huesaturation.html#lightness-prop">lightness</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#lightness-prop">lightness</a>: 0</td><td ><a href="qml-qtgraphicaleffects-huesaturation.html#lightness-prop">lightness</a>: 0</td></tr>
</table></div>
</div></div><!-- @@@saturation -->
<br/>
<!-- $$$source -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="source-prop">
<td class="tblQmlPropNode"><p>
<a name="source-prop"></a><span class="name">source</span> : <span class="type"><a href="../qtqml/qml-variant.html">variant</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property defines the source item that provides the source pixels for the effect.</p>
<p><b>Note: </b>It is not supported to let the effect include itself, for instance by setting source to the effect's parent.</p></div></div><!-- @@@source -->
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