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<td >Qt 5.9</td><td ><a href="qtgui-index.html">Qt GUI</a></td><td ><a href="qtgui-module.html">C++ Classes</a></td><td >QRasterPaintEngine</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#reimplemented-public-functions">Reimplemented Public Functions</a></li>
<li class="level1"><a href="#related-non-members">Related Non-Members</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QRasterPaintEngine Class</h1>
<!-- $$$QRasterPaintEngine-brief -->
<p>The <a href="qrasterpaintengine.html">QRasterPaintEngine</a> class enables hardware acceleration of painting operations in Qt for Embedded Linux. <a href="#details">More...</a></p>
<!-- @@@QRasterPaintEngine -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QRasterPaintEngine&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += gui</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 4.2</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> QPaintEngineEx</td></tr></table></div><p><b>This class is under development and is subject to change.</b></p>
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<li><a href="qrasterpaintengine-members.html">List of all members, including inherited members</a></li>
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<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="qrasterpaintengine.html#QRasterPaintEngine">QRasterPaintEngine</a></b>(QPaintDevice *<i>device</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#dtor.QRasterPaintEngine">~QRasterPaintEngine</a></b>()</td></tr>
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<a name="reimplemented-public-functions"></a>
<h2 id="reimplemented-public-functions">Reimplemented Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#begin">begin</a></b>(QPaintDevice *<i>device</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawEllipse">drawEllipse</a></b>(const QRectF &amp;<i>rect</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawImage">drawImage</a></b>(const QRectF &amp;<i>r</i>, const QImage &amp;<i>img</i>, const QRectF &amp;<i>sr</i>, Qt::ImageConversionFlags <i>flags</i> = Qt::AutoColor)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawLines">drawLines</a></b>(const QLine *<i>lines</i>, int <i>lineCount</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawLines-1">drawLines</a></b>(const QLineF *<i>lines</i>, int <i>lineCount</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawPixmap">drawPixmap</a></b>(const QRectF &amp;<i>r</i>, const QPixmap &amp;<i>pixmap</i>, const QRectF &amp;<i>sr</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawPoints">drawPoints</a></b>(const QPointF *<i>points</i>, int <i>pointCount</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawPoints-1">drawPoints</a></b>(const QPoint *<i>points</i>, int <i>pointCount</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawPolygon">drawPolygon</a></b>(const QPointF *<i>points</i>, int <i>pointCount</i>, PolygonDrawMode <i>mode</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawPolygon-1">drawPolygon</a></b>(const QPoint *<i>points</i>, int <i>pointCount</i>, PolygonDrawMode <i>mode</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawRects">drawRects</a></b>(const QRect *<i>rects</i>, int <i>rectCount</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawRects-1">drawRects</a></b>(const QRectF *<i>rects</i>, int <i>rectCount</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawStaticTextItem">drawStaticTextItem</a></b>(QStaticTextItem *<i>textItem</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawTextItem">drawTextItem</a></b>(const QPointF &amp;<i>p</i>, const QTextItem &amp;<i>textItem</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#drawTiledPixmap">drawTiledPixmap</a></b>(const QRectF &amp;<i>r</i>, const QPixmap &amp;<i>pixmap</i>, const QPointF &amp;<i>sr</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#end">end</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#fillRect">fillRect</a></b>(const QRectF &amp;<i>r</i>, const QBrush &amp;<i>brush</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#fillRect-1">fillRect</a></b>(const QRectF &amp;<i>r</i>, const QColor &amp;<i>color</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#shouldDrawCachedGlyphs">shouldDrawCachedGlyphs</a></b>(QFontEngine *<i>fontEngine</i>, const QTransform &amp;<i>m</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual Type </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#type">type</a></b>() const</td></tr>
</table></div>
<ul>
<li class="fn">47 public functions inherited from <a href="qpaintengineex.html#public-functions">QPaintEngineEx</a></li>
<li class="fn">24 public functions inherited from <a href="qpaintengine.html#public-functions">QPaintEngine</a></li>
</ul>
<a name="related-non-members"></a>
<h2 id="related-non-members">Related Non-Members</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> typedef </td><td class="memItemRight bottomAlign"><b><a href="qrasterpaintengine.html#QSpan-typedef">QSpan</a></b></td></tr>
</table></div>
<a name="details"></a>
<!-- $$$QRasterPaintEngine-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qrasterpaintengine.html">QRasterPaintEngine</a> class enables hardware acceleration of painting operations in Qt for Embedded Linux.</p>
<p>Note that this functionality is only available in Qt for Embedded Linux.</p>
<p>In Qt for Embedded Linux, painting is a pure software implementation. But starting with Qt 4.2, it is possible to add an accelerated graphics driver to take advantage of available hardware resources.</p>
<p>Hardware acceleration is accomplished by creating a custom screen driver, accelerating the copying from memory to the screen, and implementing a custom paint engine accelerating the various painting operations. Then a custom paint device and a custom window surface must be implemented to make Qt for Embedded Linux aware of the accelerated driver.</p>
<p><b>Note: </b>The <a href="qrasterpaintengine.html">QRasterPaintEngine</a> class does not support 8-bit images. Instead, they need to be converted to a supported format, such as <a href="qimage.html#Format-enum">QImage::Format_ARGB32_Premultiplied</a>.</p></div>
<p><b>See also </b><a href="qpaintengine.html">QPaintEngine</a>.</p>
<!-- @@@QRasterPaintEngine -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QRasterPaintEngine[overload1]$$$QRasterPaintEngineQPaintDevice* -->
<h3 class="fn" id="QRasterPaintEngine"><a name="QRasterPaintEngine"></a>QRasterPaintEngine::<span class="name">QRasterPaintEngine</span>(<span class="type"><a href="qpaintdevice.html">QPaintDevice</a></span> *<i>device</i>)</h3>
<p>Creates a raster based paint engine for operating on the given <i>device</i>, with the complete set of <a href="qpaintengine.html#PaintEngineFeature-enum">paint engine features and capabilities</a>.</p>
<p>This function was introduced in  Qt 4.5.</p>
<!-- @@@QRasterPaintEngine -->
<!-- $$$~QRasterPaintEngine[overload1]$$$~QRasterPaintEngine -->
<h3 class="fn" id="dtor.QRasterPaintEngine"><a name="dtor.QRasterPaintEngine"></a>QRasterPaintEngine::<span class="name">~QRasterPaintEngine</span>()</h3>
<p>Destroys this paint engine.</p>
<!-- @@@~QRasterPaintEngine -->
<!-- $$$begin[overload1]$$$beginQPaintDevice* -->
<h3 class="fn" id="begin"><a name="begin"></a><code>[virtual] </code><span class="type">bool</span> QRasterPaintEngine::<span class="name">begin</span>(<span class="type"><a href="qpaintdevice.html">QPaintDevice</a></span> *<i>device</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#begin">QPaintEngine::begin</a>().</p>
<!-- @@@begin -->
<!-- $$$drawEllipse[overload1]$$$drawEllipseconstQRectF& -->
<h3 class="fn" id="drawEllipse"><a name="drawEllipse"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawEllipse</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>rect</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawEllipse">QPaintEngine::drawEllipse</a>().</p>
<!-- @@@drawEllipse -->
<!-- $$$drawImage[overload1]$$$drawImageconstQRectF&constQImage&constQRectF&Qt::ImageConversionFlags -->
<h3 class="fn" id="drawImage"><a name="drawImage"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawImage</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>r</i>, const <span class="type"><a href="qimage.html">QImage</a></span> &amp;<i>img</i>, const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>sr</i>, <span class="type"><a href="../qtcore/qt.html#ImageConversionFlag-enum">Qt::ImageConversionFlags</a></span> <i>flags</i> = Qt::AutoColor)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawImage">QPaintEngine::drawImage</a>().</p>
<!-- @@@drawImage -->
<!-- $$$drawLines[overload1]$$$drawLinesconstQLine*int -->
<h3 class="fn" id="drawLines"><a name="drawLines"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawLines</span>(const <span class="type"><a href="../qtcore/qline.html">QLine</a></span> *<i>lines</i>, <span class="type">int</span> <i>lineCount</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawLines-1">QPaintEngine::drawLines</a>().</p>
<!-- @@@drawLines -->
<!-- $$$drawLines$$$drawLinesconstQLineF*int -->
<h3 class="fn" id="drawLines-1"><a name="drawLines-1"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawLines</span>(const <span class="type"><a href="../qtcore/qlinef.html">QLineF</a></span> *<i>lines</i>, <span class="type">int</span> <i>lineCount</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawLines">QPaintEngine::drawLines</a>().</p>
<!-- @@@drawLines -->
<!-- $$$drawPixmap[overload1]$$$drawPixmapconstQRectF&constQPixmap&constQRectF& -->
<h3 class="fn" id="drawPixmap"><a name="drawPixmap"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawPixmap</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>r</i>, const <span class="type"><a href="qpixmap.html">QPixmap</a></span> &amp;<i>pixmap</i>, const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>sr</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawPixmap">QPaintEngine::drawPixmap</a>().</p>
<!-- @@@drawPixmap -->
<!-- $$$drawPoints[overload1]$$$drawPointsconstQPointF*int -->
<h3 class="fn" id="drawPoints"><a name="drawPoints"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawPoints</span>(const <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> *<i>points</i>, <span class="type">int</span> <i>pointCount</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawPoints">QPaintEngine::drawPoints</a>().</p>
<!-- @@@drawPoints -->
<!-- $$$drawPoints$$$drawPointsconstQPoint*int -->
<h3 class="fn" id="drawPoints-1"><a name="drawPoints-1"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawPoints</span>(const <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> *<i>points</i>, <span class="type">int</span> <i>pointCount</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawPoints-1">QPaintEngine::drawPoints</a>().</p>
<p>This is an overloaded function.</p>
<!-- @@@drawPoints -->
<!-- $$$drawPolygon[overload1]$$$drawPolygonconstQPointF*intPolygonDrawMode -->
<h3 class="fn" id="drawPolygon"><a name="drawPolygon"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawPolygon</span>(const <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> *<i>points</i>, <span class="type">int</span> <i>pointCount</i>, <span class="type"><a href="qpaintengine.html#PolygonDrawMode-enum">PolygonDrawMode</a></span> <i>mode</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawPolygon">QPaintEngine::drawPolygon</a>().</p>
<!-- @@@drawPolygon -->
<!-- $$$drawPolygon$$$drawPolygonconstQPoint*intPolygonDrawMode -->
<h3 class="fn" id="drawPolygon-1"><a name="drawPolygon-1"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawPolygon</span>(const <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> *<i>points</i>, <span class="type">int</span> <i>pointCount</i>, <span class="type"><a href="qpaintengine.html#PolygonDrawMode-enum">PolygonDrawMode</a></span> <i>mode</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawPolygon-1">QPaintEngine::drawPolygon</a>().</p>
<!-- @@@drawPolygon -->
<!-- $$$drawRects[overload1]$$$drawRectsconstQRect*int -->
<h3 class="fn" id="drawRects"><a name="drawRects"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawRects</span>(const <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> *<i>rects</i>, <span class="type">int</span> <i>rectCount</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawRects-1">QPaintEngine::drawRects</a>().</p>
<!-- @@@drawRects -->
<!-- $$$drawRects$$$drawRectsconstQRectF*int -->
<h3 class="fn" id="drawRects-1"><a name="drawRects-1"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawRects</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> *<i>rects</i>, <span class="type">int</span> <i>rectCount</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawRects">QPaintEngine::drawRects</a>().</p>
<!-- @@@drawRects -->
<!-- $$$drawStaticTextItem[overload1]$$$drawStaticTextItemQStaticTextItem* -->
<h3 class="fn" id="drawStaticTextItem"><a name="drawStaticTextItem"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawStaticTextItem</span>(<span class="type">QStaticTextItem</span> *<i>textItem</i>)</h3>
<!-- @@@drawStaticTextItem -->
<!-- $$$drawTextItem[overload1]$$$drawTextItemconstQPointF&constQTextItem& -->
<h3 class="fn" id="drawTextItem"><a name="drawTextItem"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawTextItem</span>(const <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> &amp;<i>p</i>, const <span class="type"><a href="qtextitem.html">QTextItem</a></span> &amp;<i>textItem</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawTextItem">QPaintEngine::drawTextItem</a>().</p>
<!-- @@@drawTextItem -->
<!-- $$$drawTiledPixmap[overload1]$$$drawTiledPixmapconstQRectF&constQPixmap&constQPointF& -->
<h3 class="fn" id="drawTiledPixmap"><a name="drawTiledPixmap"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">drawTiledPixmap</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>r</i>, const <span class="type"><a href="qpixmap.html">QPixmap</a></span> &amp;<i>pixmap</i>, const <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> &amp;<i>sr</i>)</h3>
<p>Reimplemented from <a href="qpaintengine.html#drawTiledPixmap">QPaintEngine::drawTiledPixmap</a>().</p>
<!-- @@@drawTiledPixmap -->
<!-- $$$end[overload1]$$$end -->
<h3 class="fn" id="end"><a name="end"></a><code>[virtual] </code><span class="type">bool</span> QRasterPaintEngine::<span class="name">end</span>()</h3>
<p>Reimplemented from <a href="qpaintengine.html#end">QPaintEngine::end</a>().</p>
<!-- @@@end -->
<!-- $$$fillRect[overload1]$$$fillRectconstQRectF&constQBrush& -->
<h3 class="fn" id="fillRect"><a name="fillRect"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">fillRect</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>r</i>, const <span class="type"><a href="qbrush.html">QBrush</a></span> &amp;<i>brush</i>)</h3>
<!-- @@@fillRect -->
<!-- $$$fillRect$$$fillRectconstQRectF&constQColor& -->
<h3 class="fn" id="fillRect-1"><a name="fillRect-1"></a><code>[virtual] </code><span class="type">void</span> QRasterPaintEngine::<span class="name">fillRect</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &amp;<i>r</i>, const <span class="type"><a href="qcolor.html">QColor</a></span> &amp;<i>color</i>)</h3>
<!-- @@@fillRect -->
<!-- $$$shouldDrawCachedGlyphs[overload1]$$$shouldDrawCachedGlyphsQFontEngine*constQTransform& -->
<h3 class="fn" id="shouldDrawCachedGlyphs"><a name="shouldDrawCachedGlyphs"></a><code>[virtual] </code><span class="type">bool</span> QRasterPaintEngine::<span class="name">shouldDrawCachedGlyphs</span>(<span class="type">QFontEngine</span> *<i>fontEngine</i>, const <span class="type"><a href="qtransform.html">QTransform</a></span> &amp;<i>m</i>) const</h3>
<p>Indicates whether glyph caching is supported by the font engine <i>fontEngine</i> with the given transform <i>m</i> applied.</p>
<!-- @@@shouldDrawCachedGlyphs -->
<!-- $$$type[overload1]$$$type -->
<h3 class="fn" id="type"><a name="type"></a><code>[virtual] </code><span class="type"><a href="qpaintengine.html#Type-enum">Type</a></span> QRasterPaintEngine::<span class="name">type</span>() const</h3>
<p>Reimplemented from <a href="qpaintengine.html#type">QPaintEngine::type</a>().</p>
<!-- @@@type -->
</div>
<div class="relnonmem">
<h2>Related Non-Members</h2>
<!-- $$$QSpan -->
<h3 class="fn" id="QSpan-typedef"><a name="QSpan-typedef"></a>typedef <span class="name">QSpan</span></h3>
<p>A struct equivalent to QT_FT_Span, containing a position (x, y), the span's length in pixels and its color/coverage (a value ranging from 0 to 255).</p>
<!-- @@@QSpan -->
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