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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/qglformat.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
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diff --git a/doc/html/qglformat.html b/doc/html/qglformat.html new file mode 100644 index 0000000..e4967ef --- /dev/null +++ b/doc/html/qglformat.html @@ -0,0 +1,474 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/opengl/qgl.cpp:95 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>QGLFormat Class</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QGLFormat Class Reference<br><small>[<a href="opengl.html">OpenGL module</a>]</small></h1> + +<p>The QGLFormat class specifies the display format of an OpenGL +rendering context. +<a href="#details">More...</a> +<p><tt>#include <<a href="qgl-h.html">qgl.h</a>></tt> +<p>Inherits <a href="qgl.html">QGL</a>. +<p><a href="qglformat-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn><a href="#QGLFormat"><b>QGLFormat</b></a> ()</li> +<li class=fn><a href="#QGLFormat-2"><b>QGLFormat</b></a> ( int options, int plane = 0 )</li> +<li class=fn>bool <a href="#doubleBuffer"><b>doubleBuffer</b></a> () const</li> +<li class=fn>void <a href="#setDoubleBuffer"><b>setDoubleBuffer</b></a> ( bool enable )</li> +<li class=fn>bool <a href="#depth"><b>depth</b></a> () const</li> +<li class=fn>void <a href="#setDepth"><b>setDepth</b></a> ( bool enable )</li> +<li class=fn>bool <a href="#rgba"><b>rgba</b></a> () const</li> +<li class=fn>void <a href="#setRgba"><b>setRgba</b></a> ( bool enable )</li> +<li class=fn>bool <a href="#alpha"><b>alpha</b></a> () const</li> +<li class=fn>void <a href="#setAlpha"><b>setAlpha</b></a> ( bool enable )</li> +<li class=fn>bool <a href="#accum"><b>accum</b></a> () const</li> +<li class=fn>void <a href="#setAccum"><b>setAccum</b></a> ( bool enable )</li> +<li class=fn>bool <a href="#stencil"><b>stencil</b></a> () const</li> +<li class=fn>void <a href="#setStencil"><b>setStencil</b></a> ( bool enable )</li> +<li class=fn>bool <a href="#stereo"><b>stereo</b></a> () const</li> +<li class=fn>void <a href="#setStereo"><b>setStereo</b></a> ( bool enable )</li> +<li class=fn>bool <a href="#directRendering"><b>directRendering</b></a> () const</li> +<li class=fn>void <a href="#setDirectRendering"><b>setDirectRendering</b></a> ( bool enable )</li> +<li class=fn>bool <a href="#hasOverlay"><b>hasOverlay</b></a> () const</li> +<li class=fn>void <a href="#setOverlay"><b>setOverlay</b></a> ( bool enable )</li> +<li class=fn>int <a href="#plane"><b>plane</b></a> () const</li> +<li class=fn>void <a href="#setPlane"><b>setPlane</b></a> ( int plane )</li> +<li class=fn>void <a href="#setOption"><b>setOption</b></a> ( FormatOption opt )</li> +<li class=fn>bool <a href="#testOption"><b>testOption</b></a> ( FormatOption opt ) const</li> +</ul> +<h2>Static Public Members</h2> +<ul> +<li class=fn>QGLFormat <a href="#defaultFormat"><b>defaultFormat</b></a> ()</li> +<li class=fn>void <a href="#setDefaultFormat"><b>setDefaultFormat</b></a> ( const QGLFormat & f )</li> +<li class=fn>QGLFormat <a href="#defaultOverlayFormat"><b>defaultOverlayFormat</b></a> ()</li> +<li class=fn>void <a href="#setDefaultOverlayFormat"><b>setDefaultOverlayFormat</b></a> ( const QGLFormat & f )</li> +<li class=fn>bool <a href="#hasOpenGL"><b>hasOpenGL</b></a> ()</li> +<li class=fn>bool <a href="#hasOpenGLOverlays"><b>hasOpenGLOverlays</b></a> ()</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + +The QGLFormat class specifies the display format of an OpenGL +rendering context. + +<p> + + +<p> A display format has several characteristics: +<ul> +<li> <a href="#setDoubleBuffer">Double or single buffering.</a> +<li> <a href="#setDepth">Depth buffer.</a> +<li> <a href="#setRgba">RGBA or color index mode.</a> +<li> <a href="#setAlpha">Alpha channel.</a> +<li> <a href="#setAccum">Accumulation buffer.</a> +<li> <a href="#setStencil">Stencil buffer.</a> +<li> <a href="#setStereo">Stereo buffers.</a> +<li> <a href="#setDirectRendering">Direct rendering.</a> +<li> <a href="#setOverlay">Presence of an overlay.</a> +<li> <a href="#setPlane">The plane of an overlay format.</a> +</ul> +<p> You create and tell a QGLFormat object what rendering options you +want from an OpenGL<sup>*</sup> rendering context. +<p> OpenGL drivers or accelerated hardware may or may not support +advanced features such as alpha channel or stereographic viewing. +If you request some features that the driver/hardware does not +provide when you create a <a href="qglwidget.html">QGLWidget</a>, you will get a rendering +context with the nearest subset of features. +<p> There are different ways to define the display characteristics of +a rendering context. One is to create a QGLFormat and make it the +default for the entire application: +<pre> + QGLFormat f; + f.<a href="#setAlpha">setAlpha</a>( TRUE ); + f.<a href="#setStereo">setStereo</a>( TRUE ); + QGLFormat::<a href="#setDefaultFormat">setDefaultFormat</a>( f ); + </pre> + +<p> Or you can specify the desired format when creating an object of +your QGLWidget subclass: +<pre> + QGLFormat f; + f.<a href="#setDoubleBuffer">setDoubleBuffer</a>( FALSE ); // single buffer + f.<a href="#setDirectRendering">setDirectRendering</a>( FALSE ); // software rendering + MyGLWidget* myWidget = new MyGLWidget( f, ... ); + </pre> + +<p> After the widget has been created, you can find out which of the +requested features the system was able to provide: +<pre> + QGLFormat f; + f.<a href="#setOverlay">setOverlay</a>( TRUE ); + f.<a href="#setStereo">setStereo</a>( TRUE ); + MyGLWidget* myWidget = new MyGLWidget( f, ... ); + if ( !w->format().stereo() ) { + // ok, goggles off + if ( !w->format().hasOverlay() ) { + <a href="qapplication.html#qFatal">qFatal</a>( "Cool hardware required" ); + } + } + </pre> + +<p> <sup>*</sup> OpenGL is a trademark of Silicon Graphics, Inc. in the +United States and other countries. +<p> <p>See also <a href="qglcontext.html">QGLContext</a>, <a href="qglwidget.html">QGLWidget</a>, <a href="graphics.html">Graphics Classes</a>, and <a href="images.html">Image Processing Classes</a>. + +<hr><h2>Member Function Documentation</h2> +<h3 class=fn><a name="QGLFormat"></a>QGLFormat::QGLFormat () +</h3> +Constructs a QGLFormat object with the factory default settings: +<ul> +<li> <a href="#setDoubleBuffer">Double buffer:</a> Enabled. +<li> <a href="#setDepth">Depth buffer:</a> Enabled. +<li> <a href="#setRgba">RGBA:</a> Enabled (i.e., color index disabled). +<li> <a href="#setAlpha">Alpha channel:</a> Disabled. +<li> <a href="#setAccum">Accumulator buffer:</a> Disabled. +<li> <a href="#setStencil">Stencil buffer:</a> Disabled. +<li> <a href="#setStereo">Stereo:</a> Disabled. +<li> <a href="#setDirectRendering">Direct rendering:</a> Enabled. +<li> <a href="#setOverlay">Overlay:</a> Disabled. +<li> <a href="#setPlane">Plane:</a> 0 (i.e., normal plane). +</ul> + +<h3 class=fn><a name="QGLFormat-2"></a>QGLFormat::QGLFormat ( int options, int plane = 0 ) +</h3> +Creates a QGLFormat object that is a copy of the current <a href="#defaultFormat">application default format</a>. +<p> If <em>options</em> is not 0, this copy is modified by these format +options. The <em>options</em> parameter should be <a href="qgl.html#FormatOption-enum">FormatOption</a> values +OR'ed together. +<p> This constructor makes it easy to specify a certain desired format +in classes derived from <a href="qglwidget.html">QGLWidget</a>, for example: +<pre> + // The rendering in MyGLWidget depends on using + // stencil buffer and alpha channel + MyGLWidget::MyGLWidget( <a href="qwidget.html">QWidget</a>* parent, const char* name ) + : <a href="qglwidget.html">QGLWidget</a>( <a href="#QGLFormat">QGLFormat</a>( StencilBuffer | AlphaChannel ), parent, name ) + { + if ( !format().stencil() ) + <a href="qapplication.html#qWarning">qWarning</a>( "Could not get stencil buffer; results will be suboptimal" ); + if ( !format().alphaChannel() ) + <a href="qapplication.html#qWarning">qWarning</a>( "Could not get alpha channel; results will be suboptimal" ); + ... + } + </pre> + +<p> Note that there are <a href="qgl.html#FormatOption-enum">FormatOption</a> values to turn format settings +both on and off, e.g. <a href="qgl.html#FormatOption-enum">DepthBuffer</a> and <a href="qgl.html#FormatOption-enum">NoDepthBuffer</a>, +<a href="qgl.html#FormatOption-enum">DirectRendering</a> and <a href="qgl.html#FormatOption-enum">IndirectRendering</a>, etc. +<p> The <em>plane</em> parameter defaults to 0 and is the plane which this +format should be associated with. Not all OpenGL implmentations +supports overlay/underlay rendering planes. +<p> <p>See also <a href="#defaultFormat">defaultFormat</a>() and <a href="#setOption">setOption</a>(). + +<h3 class=fn>bool <a name="accum"></a>QGLFormat::accum () const +</h3> + +<p> Returns TRUE if the accumulation buffer is enabled; otherwise +returns FALSE. The accumulation buffer is disabled by default. +<p> <p>See also <a href="#setAccum">setAccum</a>(). + +<h3 class=fn>bool <a name="alpha"></a>QGLFormat::alpha () const +</h3> + +<p> Returns TRUE if the alpha channel of the framebuffer is enabled; +otherwise returns FALSE. The alpha channel is disabled by default. +<p> <p>See also <a href="#setAlpha">setAlpha</a>(). + +<h3 class=fn><a href="qglformat.html">QGLFormat</a> <a name="defaultFormat"></a>QGLFormat::defaultFormat ()<tt> [static]</tt> +</h3> +Returns the default QGLFormat for the application. All QGLWidgets +that are created use this format unless another format is +specified, e.g. when they are constructed. +<p> If no special default format has been set using +<a href="#setDefaultFormat">setDefaultFormat</a>(), the default format is the same as that created +with QGLFormat(). +<p> <p>See also <a href="#setDefaultFormat">setDefaultFormat</a>(). + +<h3 class=fn><a href="qglformat.html">QGLFormat</a> <a name="defaultOverlayFormat"></a>QGLFormat::defaultOverlayFormat ()<tt> [static]</tt> +</h3> +Returns the default QGLFormat for overlay contexts. +<p> The factory default overlay format is: +<ul> +<li> <a href="#setDoubleBuffer">Double buffer:</a> Disabled. +<li> <a href="#setDepth">Depth buffer:</a> Disabled. +<li> <a href="#setRgba">RGBA:</a> Disabled (i.e., color index enabled). +<li> <a href="#setAlpha">Alpha channel:</a> Disabled. +<li> <a href="#setAccum">Accumulator buffer:</a> Disabled. +<li> <a href="#setStencil">Stencil buffer:</a> Disabled. +<li> <a href="#setStereo">Stereo:</a> Disabled. +<li> <a href="#setDirectRendering">Direct rendering:</a> Enabled. +<li> <a href="#setOverlay">Overlay:</a> Disabled. +<li> <a href="#setPlane">Plane:</a> 1 (i.e., first overlay plane). +</ul> +<p> <p>See also <a href="#setDefaultFormat">setDefaultFormat</a>(). + +<h3 class=fn>bool <a name="depth"></a>QGLFormat::depth () const +</h3> + +<p> Returns TRUE if the depth buffer is enabled; otherwise returns +FALSE. The depth buffer is enabled by default. +<p> <p>See also <a href="#setDepth">setDepth</a>(). + +<h3 class=fn>bool <a name="directRendering"></a>QGLFormat::directRendering () const +</h3> + +<p> Returns TRUE if direct rendering is enabled; otherwise returns +FALSE. +<p> Direct rendering is enabled by default. +<p> <p>See also <a href="#setDirectRendering">setDirectRendering</a>(). + +<h3 class=fn>bool <a name="doubleBuffer"></a>QGLFormat::doubleBuffer () const +</h3> + +<p> Returns TRUE if double buffering is enabled; otherwise returns +FALSE. Double buffering is enabled by default. +<p> <p>See also <a href="#setDoubleBuffer">setDoubleBuffer</a>(). + +<h3 class=fn>bool <a name="hasOpenGL"></a>QGLFormat::hasOpenGL ()<tt> [static]</tt> +</h3> + +<p> Returns TRUE if the window system has any OpenGL support; +otherwise returns FALSE. +<p> <b>Warning:</b> This function must not be called until the <a href="qapplication.html">QApplication</a> +object has been created. + +<h3 class=fn>bool <a name="hasOpenGLOverlays"></a>QGLFormat::hasOpenGLOverlays ()<tt> [static]</tt> +</h3> + +<p> Returns TRUE if the window system supports OpenGL overlays; +otherwise returns FALSE. +<p> <b>Warning:</b> This function must not be called until the <a href="qapplication.html">QApplication</a> +object has been created. + +<h3 class=fn>bool <a name="hasOverlay"></a>QGLFormat::hasOverlay () const +</h3> + +<p> Returns TRUE if overlay plane is enabled; otherwise returns FALSE. +<p> Overlay is disabled by default. +<p> <p>See also <a href="#setOverlay">setOverlay</a>(). + +<h3 class=fn>int <a name="plane"></a>QGLFormat::plane () const +</h3> +Returns the plane of this format. The default for normal formats +is 0, which means the normal plane. The default for overlay +formats is 1, which is the first overlay plane. +<p> <p>See also <a href="#setPlane">setPlane</a>(). + +<h3 class=fn>bool <a name="rgba"></a>QGLFormat::rgba () const +</h3> + +<p> Returns TRUE if RGBA color mode is set. Returns FALSE if color +index mode is set. The default color mode is RGBA. +<p> <p>See also <a href="#setRgba">setRgba</a>(). + +<h3 class=fn>void <a name="setAccum"></a>QGLFormat::setAccum ( bool enable ) +</h3> +If <em>enable</em> is TRUE enables the accumulation buffer; otherwise +disables the accumulation buffer. +<p> The accumulation buffer is disabled by default. +<p> The accumulation buffer is used to create blur effects and +multiple exposures. +<p> <p>See also <a href="#accum">accum</a>(). + +<h3 class=fn>void <a name="setAlpha"></a>QGLFormat::setAlpha ( bool enable ) +</h3> +If <em>enable</em> is TRUE enables the alpha channel; otherwise disables +the alpha channel. +<p> The alpha buffer is disabled by default. +<p> The alpha channel is typically used for implementing transparency +or translucency. The A in RGBA specifies the transparency of a +pixel. +<p> <p>See also <a href="#alpha">alpha</a>(). + +<h3 class=fn>void <a name="setDefaultFormat"></a>QGLFormat::setDefaultFormat ( const <a href="qglformat.html">QGLFormat</a> & f )<tt> [static]</tt> +</h3> +Sets a new default QGLFormat for the application to <em>f</em>. For +example, to set single buffering as the default instead of double +buffering, your main() might contain code like this: +<pre> + <a href="qapplication.html">QApplication</a> a(argc, argv); + QGLFormat f; + f.<a href="#setDoubleBuffer">setDoubleBuffer</a>( FALSE ); + QGLFormat::<a href="#setDefaultFormat">setDefaultFormat</a>( f ); + </pre> + +<p> <p>See also <a href="#defaultFormat">defaultFormat</a>(). + +<h3 class=fn>void <a name="setDefaultOverlayFormat"></a>QGLFormat::setDefaultOverlayFormat ( const <a href="qglformat.html">QGLFormat</a> & f )<tt> [static]</tt> +</h3> +Sets a new default QGLFormat for overlay contexts to <em>f</em>. This +format is used whenever a <a href="qglwidget.html">QGLWidget</a> is created with a format that +<a href="#hasOverlay">hasOverlay</a>() enabled. +<p> For example, to get a double buffered overlay context (if +available), use code like this: +<p> <pre> + QGLFormat f = QGLFormat::<a href="#defaultOverlayFormat">defaultOverlayFormat</a>(); + f.<a href="#setDoubleBuffer">setDoubleBuffer</a>( TRUE ); + QGLFormat::<a href="#setDefaultOverlayFormat">setDefaultOverlayFormat</a>( f ); + </pre> + +<p> As usual, you can find out after widget creation whether the +underlying OpenGL system was able to provide the requested +specification: +<p> <pre> + // ...continued from above + MyGLWidget* myWidget = new MyGLWidget( <a href="#QGLFormat">QGLFormat</a>( QGL::<a href="qgl.html#FormatOption-enum">HasOverlay</a> ), ... ); + if ( myWidget->format().hasOverlay() ) { + // Yes, we got an overlay, let's check _its_ format: + <a href="qglcontext.html">QGLContext</a>* olContext = myWidget->overlayContext(); + if ( olContext-><a href="qglcontext.html#format">format</a>().doubleBuffer() ) + ; // yes, we got a double buffered overlay + else + ; // no, only single buffered overlays are available + } + </pre> + +<p> <p>See also <a href="#defaultOverlayFormat">defaultOverlayFormat</a>(). + +<h3 class=fn>void <a name="setDepth"></a>QGLFormat::setDepth ( bool enable ) +</h3> +If <em>enable</em> is TRUE enables the depth buffer; otherwise disables +the depth buffer. +<p> The depth buffer is enabled by default. +<p> The purpose of a depth buffer (or Z-buffering) is to remove hidden +surfaces. Pixels are assigned Z values based on the distance to +the viewer. A pixel with a high Z value is closer to the viewer +than a pixel with a low Z value. This information is used to +decide whether to draw a pixel or not. +<p> <p>See also <a href="#depth">depth</a>(). + +<h3 class=fn>void <a name="setDirectRendering"></a>QGLFormat::setDirectRendering ( bool enable ) +</h3> +If <em>enable</em> is TRUE enables direct rendering; otherwise disables +direct rendering. +<p> Direct rendering is enabled by default. +<p> Enabling this option will make OpenGL bypass the underlying window +system and render directly from hardware to the screen, if this is +supported by the system. +<p> <p>See also <a href="#directRendering">directRendering</a>(). + +<h3 class=fn>void <a name="setDoubleBuffer"></a>QGLFormat::setDoubleBuffer ( bool enable ) +</h3> +If <em>enable</em> is TRUE sets double buffering; otherwise sets single +buffering. +<p> Double buffering is enabled by default. +<p> Double buffering is a technique where graphics are rendered on an +off-screen buffer and not directly to the screen. When the drawing +has been completed, the program calls a swapBuffers() function to +exchange the screen contents with the buffer. The result is +flicker-free drawing and often better performance. +<p> <p>See also <a href="#doubleBuffer">doubleBuffer</a>(), <a href="qglcontext.html#swapBuffers">QGLContext::swapBuffers</a>(), and <a href="qglwidget.html#swapBuffers">QGLWidget::swapBuffers</a>(). + +<h3 class=fn>void <a name="setOption"></a>QGLFormat::setOption ( <a href="qgl.html#FormatOption-enum">FormatOption</a> opt ) +</h3> +Sets the format option to <em>opt</em>. +<p> <p>See also <a href="#testOption">testOption</a>(). + +<h3 class=fn>void <a name="setOverlay"></a>QGLFormat::setOverlay ( bool enable ) +</h3> +If <em>enable</em> is TRUE enables an overlay plane; otherwise disables +the overlay plane. +<p> Enabling the overlay plane will cause <a href="qglwidget.html">QGLWidget</a> to create an +additional context in an overlay plane. See the QGLWidget +documentation for further information. +<p> <p>See also <a href="#hasOverlay">hasOverlay</a>(). + +<h3 class=fn>void <a name="setPlane"></a>QGLFormat::setPlane ( int plane ) +</h3> +Sets the requested plane to <em>plane</em>. 0 is the normal plane, 1 is +the first overlay plane, 2 is the second overlay plane, etc.; -1, +-2, etc. are underlay planes. +<p> Note that in contrast to other format specifications, the plane +specifications will be matched exactly. This means that if you +specify a plane that the underlying OpenGL system cannot provide, +an <a href="qglwidget.html#isValid">invalid</a> <a href="qglwidget.html">QGLWidget</a> will be +created. +<p> <p>See also <a href="#plane">plane</a>(). + +<h3 class=fn>void <a name="setRgba"></a>QGLFormat::setRgba ( bool enable ) +</h3> +If <em>enable</em> is TRUE sets RGBA mode. If <em>enable</em> is FALSE sets +color index mode. +<p> The default color mode is RGBA. +<p> RGBA is the preferred mode for most OpenGL applications. In RGBA +color mode you specify colors as red + green + blue + alpha +quadruplets. +<p> In color index mode you specify an index into a color lookup +table. +<p> <p>See also <a href="#rgba">rgba</a>(). + +<h3 class=fn>void <a name="setStencil"></a>QGLFormat::setStencil ( bool enable ) +</h3> +If <em>enable</em> is TRUE enables the stencil buffer; otherwise +disables the stencil buffer. +<p> The stencil buffer is disabled by default. +<p> The stencil buffer masks certain parts of the drawing area so that +masked parts are not drawn on. +<p> <p>See also <a href="#stencil">stencil</a>(). + +<h3 class=fn>void <a name="setStereo"></a>QGLFormat::setStereo ( bool enable ) +</h3> +If <em>enable</em> is TRUE enables stereo buffering; otherwise disables +stereo buffering. +<p> Stereo buffering is disabled by default. +<p> Stereo buffering provides extra color buffers to generate left-eye +and right-eye images. +<p> <p>See also <a href="#stereo">stereo</a>(). + +<h3 class=fn>bool <a name="stencil"></a>QGLFormat::stencil () const +</h3> + +<p> Returns TRUE if the stencil buffer is enabled; otherwise returns +FALSE. The stencil buffer is disabled by default. +<p> <p>See also <a href="#setStencil">setStencil</a>(). + +<h3 class=fn>bool <a name="stereo"></a>QGLFormat::stereo () const +</h3> + +<p> Returns TRUE if stereo buffering is enabled; otherwise returns +FALSE. Stereo buffering is disabled by default. +<p> <p>See also <a href="#setStereo">setStereo</a>(). + +<h3 class=fn>bool <a name="testOption"></a>QGLFormat::testOption ( <a href="qgl.html#FormatOption-enum">FormatOption</a> opt ) const +</h3> +Returns TRUE if format option <em>opt</em> is set; otherwise returns FALSE. +<p> <p>See also <a href="#setOption">setOption</a>(). + +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">Qt toolkit</a>. +Copyright © 1995-2007 +<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |