<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qmediaencodersettings.cpp --> <title>QImageEncoderSettings Class | Qt Multimedia 5.12.2</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtmultimedia-index.html">Qt Multimedia</a></td><td ><a href="qtmultimedia-modules.html">C++ Classes</a></td><td >QImageEncoderSettings</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtmultimedia-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">QImageEncoderSettings Class</h1> <!-- $$$QImageEncoderSettings-brief --> <p>The <a href="qimageencodersettings.html">QImageEncoderSettings</a> class provides a set of image encoder settings. <a href="#details">More...</a></p> <!-- @@@QImageEncoderSettings --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QImageEncoderSettings></span> </td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += multimedia</td></tr></table></div><ul> <li><a href="qimageencodersettings-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-functions"></a> <h2 id="public-functions">Public Functions</h2> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#QImageEncoderSettings">QImageEncoderSettings</a></b>()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#QImageEncoderSettings-1">QImageEncoderSettings</a></b>(const QImageEncoderSettings &<i>other</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#dtor.QImageEncoderSettings">~QImageEncoderSettings</a></b>()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#codec">codec</a></b>() const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#encodingOption">encodingOption</a></b>(const QString &<i>option</i>) const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QVariantMap </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#encodingOptions">encodingOptions</a></b>() const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#isNull">isNull</a></b>() const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QMultimedia::EncodingQuality </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#quality">quality</a></b>() const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QSize </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#resolution">resolution</a></b>() const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#setCodec">setCodec</a></b>(const QString &<i>codec</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#setEncodingOption">setEncodingOption</a></b>(const QString &<i>option</i>, const QVariant &<i>value</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#setEncodingOptions">setEncodingOptions</a></b>(const QVariantMap &<i>options</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#setQuality">setQuality</a></b>(QMultimedia::EncodingQuality <i>quality</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#setResolution">setResolution</a></b>(const QSize &<i>resolution</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#setResolution-1">setResolution</a></b>(int <i>width</i>, int <i>height</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#operator-not-eq">operator!=</a></b>(const QImageEncoderSettings &<i>other</i>) const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QImageEncoderSettings &</td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#operator-eq">operator=</a></b>(const QImageEncoderSettings &<i>other</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qimageencodersettings.html#operator-eq-eq">operator==</a></b>(const QImageEncoderSettings &<i>other</i>) const</td></tr> </table></div> <a name="details"></a> <!-- $$$QImageEncoderSettings-description --> <div class="descr"> <h2 id="details">Detailed Description</h2> <p>The <a href="qimageencodersettings.html">QImageEncoderSettings</a> class provides a set of image encoder settings.</p> <p>A image encoder settings object is used to specify the image encoder settings used by <a href="qcameraimagecapture.html">QCameraImageCapture</a>. Image encoder settings are selected by constructing a <a href="qimageencodersettings.html">QImageEncoderSettings</a> object, setting the desired properties and then passing it to a <a href="qcameraimagecapture.html">QCameraImageCapture</a> instance using the QCameraImageCapture::setImageSettings() function.</p> <pre class="cpp"> <span class="type"><a href="qimageencodersettings.html#QImageEncoderSettings">QImageEncoderSettings</a></span> imageSettings; imageSettings<span class="operator">.</span>setCodec(<span class="string">"image/jpeg"</span>); imageSettings<span class="operator">.</span>setResolution(<span class="number">1600</span><span class="operator">,</span> <span class="number">1200</span>); imageCapture<span class="operator">-</span><span class="operator">></span>setEncodingSettings(imageSettings); </pre> </div> <p><b>See also </b><a href="qimageencodercontrol.html">QImageEncoderControl</a>.</p> <!-- @@@QImageEncoderSettings --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$QImageEncoderSettings[overload1]$$$QImageEncoderSettings --> <h3 class="fn" id="QImageEncoderSettings"><a name="QImageEncoderSettings"></a>QImageEncoderSettings::<span class="name">QImageEncoderSettings</span>()</h3> <p>Constructs a null image encoder settings object.</p> <!-- @@@QImageEncoderSettings --> <!-- $$$QImageEncoderSettings$$$QImageEncoderSettingsconstQImageEncoderSettings& --> <h3 class="fn" id="QImageEncoderSettings-1"><a name="QImageEncoderSettings-1"></a>QImageEncoderSettings::<span class="name">QImageEncoderSettings</span>(const <span class="type"><a href="qimageencodersettings.html#QImageEncoderSettings">QImageEncoderSettings</a></span> &<i>other</i>)</h3> <p>Constructs a copy of the image encoder settings object <i>other</i>.</p> <!-- @@@QImageEncoderSettings --> <!-- $$$~QImageEncoderSettings[overload1]$$$~QImageEncoderSettings --> <h3 class="fn" id="dtor.QImageEncoderSettings"><a name="dtor.QImageEncoderSettings"></a>QImageEncoderSettings::<span class="name">~QImageEncoderSettings</span>()</h3> <p>Destroys a image encoder settings object.</p> <!-- @@@~QImageEncoderSettings --> <!-- $$$codec[overload1]$$$codec --> <h3 class="fn" id="codec"><a name="codec"></a><span class="type">QString</span> QImageEncoderSettings::<span class="name">codec</span>() const</h3> <p>Returns the image codec.</p> <p><b>See also </b><a href="qimageencodersettings.html#setCodec">setCodec</a>().</p> <!-- @@@codec --> <!-- $$$encodingOption[overload1]$$$encodingOptionconstQString& --> <h3 class="fn" id="encodingOption"><a name="encodingOption"></a><span class="type">QVariant</span> QImageEncoderSettings::<span class="name">encodingOption</span>(const <span class="type">QString</span> &<i>option</i>) const</h3> <p>Returns the value of encoding <i>option</i>.</p> <p><b>See also </b><a href="qimageencodersettings.html#setEncodingOption">setEncodingOption</a>() and <a href="qimageencodersettings.html#encodingOptions">encodingOptions</a>().</p> <!-- @@@encodingOption --> <!-- $$$encodingOptions[overload1]$$$encodingOptions --> <h3 class="fn" id="encodingOptions"><a name="encodingOptions"></a><span class="type">QVariantMap</span> QImageEncoderSettings::<span class="name">encodingOptions</span>() const</h3> <p>Returns the all the encoding options as QVariantMap.</p> <p><b>See also </b><a href="qimageencodersettings.html#encodingOption">encodingOption</a>() and <a href="qimageencodersettings.html#setEncodingOptions">setEncodingOptions</a>().</p> <!-- @@@encodingOptions --> <!-- $$$isNull[overload1]$$$isNull --> <h3 class="fn" id="isNull"><a name="isNull"></a><span class="type">bool</span> QImageEncoderSettings::<span class="name">isNull</span>() const</h3> <p>Identifies if a image encoder settings object is uninitalized.</p> <p>Returns true if the settings are null, and false if they are not.</p> <!-- @@@isNull --> <!-- $$$quality[overload1]$$$quality --> <h3 class="fn" id="quality"><a name="quality"></a><span class="type"><a href="qmultimedia.html#EncodingQuality-enum">QMultimedia::EncodingQuality</a></span> QImageEncoderSettings::<span class="name">quality</span>() const</h3> <p>Returns the image encoding quality.</p> <p><b>See also </b><a href="qimageencodersettings.html#setQuality">setQuality</a>().</p> <!-- @@@quality --> <!-- $$$resolution[overload1]$$$resolution --> <h3 class="fn" id="resolution"><a name="resolution"></a><span class="type">QSize</span> QImageEncoderSettings::<span class="name">resolution</span>() const</h3> <p>Returns the resolution of the encoded image.</p> <p><b>See also </b><a href="qimageencodersettings.html#setResolution">setResolution</a>().</p> <!-- @@@resolution --> <!-- $$$setCodec[overload1]$$$setCodecconstQString& --> <h3 class="fn" id="setCodec"><a name="setCodec"></a><span class="type">void</span> QImageEncoderSettings::<span class="name">setCodec</span>(const <span class="type">QString</span> &<i>codec</i>)</h3> <p>Sets the image <i>codec</i>.</p> <p><b>See also </b><a href="qimageencodersettings.html#codec">codec</a>().</p> <!-- @@@setCodec --> <!-- $$$setEncodingOption[overload1]$$$setEncodingOptionconstQString&constQVariant& --> <h3 class="fn" id="setEncodingOption"><a name="setEncodingOption"></a><span class="type">void</span> QImageEncoderSettings::<span class="name">setEncodingOption</span>(const <span class="type">QString</span> &<i>option</i>, const <span class="type">QVariant</span> &<i>value</i>)</h3> <p>Set the encoding <i>option</i> <i>value</i>.</p> <p>The supported set and meaning of encoding options are system and selected codec specific.</p> <p><b>See also </b><a href="qimageencodersettings.html#encodingOption">encodingOption</a>() and <a href="qimageencodersettings.html#setEncodingOptions">setEncodingOptions</a>().</p> <!-- @@@setEncodingOption --> <!-- $$$setEncodingOptions[overload1]$$$setEncodingOptionsconstQVariantMap& --> <h3 class="fn" id="setEncodingOptions"><a name="setEncodingOptions"></a><span class="type">void</span> QImageEncoderSettings::<span class="name">setEncodingOptions</span>(const <span class="type">QVariantMap</span> &<i>options</i>)</h3> <p>Replace all the encoding options with <i>options</i>.</p> <p>The supported set and meaning of encoding options are system and selected codec specific.</p> <p><b>See also </b><a href="qimageencodersettings.html#encodingOptions">encodingOptions</a>(), <a href="qimageencodersettings.html#encodingOption">encodingOption</a>(), and <a href="qimageencodersettings.html#setEncodingOption">setEncodingOption</a>().</p> <!-- @@@setEncodingOptions --> <!-- $$$setQuality[overload1]$$$setQualityQMultimedia::EncodingQuality --> <h3 class="fn" id="setQuality"><a name="setQuality"></a><span class="type">void</span> QImageEncoderSettings::<span class="name">setQuality</span>(<span class="type"><a href="qmultimedia.html#EncodingQuality-enum">QMultimedia::EncodingQuality</a></span> <i>quality</i>)</h3> <p>Sets the image encoding <i>quality</i>.</p> <p><b>See also </b><a href="qimageencodersettings.html#quality">quality</a>().</p> <!-- @@@setQuality --> <!-- $$$setResolution[overload1]$$$setResolutionconstQSize& --> <h3 class="fn" id="setResolution"><a name="setResolution"></a><span class="type">void</span> QImageEncoderSettings::<span class="name">setResolution</span>(const <span class="type">QSize</span> &<i>resolution</i>)</h3> <p>Sets the <i>resolution</i> of the encoded image.</p> <p>An empty QSize indicates the encoder should make an optimal choice based on what is available from the image source and the limitations of the codec.</p> <p><b>See also </b><a href="qimageencodersettings.html#resolution">resolution</a>().</p> <!-- @@@setResolution --> <!-- $$$setResolution$$$setResolutionintint --> <h3 class="fn" id="setResolution-1"><a name="setResolution-1"></a><span class="type">void</span> QImageEncoderSettings::<span class="name">setResolution</span>(<span class="type">int</span> <i>width</i>, <span class="type">int</span> <i>height</i>)</h3> <p>Sets the <i>width</i> and <i>height</i> of the resolution of the encoded image.</p> <p>This is an overloaded function.</p> <!-- @@@setResolution --> <!-- $$$operator!=[overload1]$$$operator!=constQImageEncoderSettings& --> <h3 class="fn" id="operator-not-eq"><a name="operator-not-eq"></a><span class="type">bool</span> QImageEncoderSettings::<span class="name">operator!=</span>(const <span class="type"><a href="qimageencodersettings.html#QImageEncoderSettings">QImageEncoderSettings</a></span> &<i>other</i>) const</h3> <p>Determines if <i>other</i> is of equal value to a image encoder settings object.</p> <p>Returns true if the settings objects are not of equal value, and false if they are of equal value.</p> <!-- @@@operator!= --> <!-- $$$operator=[overload1]$$$operator=constQImageEncoderSettings& --> <h3 class="fn" id="operator-eq"><a name="operator-eq"></a><span class="type"><a href="qimageencodersettings.html#QImageEncoderSettings">QImageEncoderSettings</a></span> &QImageEncoderSettings::<span class="name">operator=</span>(const <span class="type"><a href="qimageencodersettings.html#QImageEncoderSettings">QImageEncoderSettings</a></span> &<i>other</i>)</h3> <p>Assigns the value of <i>other</i> to a image encoder settings object.</p> <!-- @@@operator= --> <!-- $$$operator==[overload1]$$$operator==constQImageEncoderSettings& --> <h3 class="fn" id="operator-eq-eq"><a name="operator-eq-eq"></a><span class="type">bool</span> QImageEncoderSettings::<span class="name">operator==</span>(const <span class="type"><a href="qimageencodersettings.html#QImageEncoderSettings">QImageEncoderSettings</a></span> &<i>other</i>) const</h3> <p>Determines if <i>other</i> is of equal value to a image encoder settings object.</p> <p>Returns true if the settings objects are of equal value, and false if they are not of equal value.</p> <!-- @@@operator== --> </div> </div> </div> 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