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393 lines
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<li class="navelem"><b>sf</b></li><li class="navelem"><a class="el" href="classsf_1_1Context.html">Context</a></li> </ul>
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</div><!-- top -->
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<a href="#pub-methods">Public Member Functions</a> |
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<a href="#pub-static-methods">Static Public Member Functions</a> |
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<a href="#pri-static-methods">Static Private Member Functions</a> |
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<a href="classsf_1_1Context-members.html">List of all members</a> </div>
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<div class="headertitle">
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<div class="title">sf::Context Class Reference<div class="ingroups"><a class="el" href="group__window.html">Window module</a></div></div> </div>
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</div><!--header-->
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<div class="contents">
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<p>Class holding a valid drawing context.
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<a href="classsf_1_1Context.html#details">More...</a></p>
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<p><code>#include <<a class="el" href="Context_8hpp_source.html">Context.hpp</a>></code></p>
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Inheritance diagram for sf::Context:</div>
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<img src="classsf_1_1Context.png" usemap="#sf::Context_map" alt=""/>
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<area href="classsf_1_1GlResource.html" title="Base class for classes that require an OpenGL context. " alt="sf::GlResource" shape="rect" coords="0,0,105,24"/>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
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Public Member Functions</h2></td></tr>
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<tr class="memitem:aba22797a790706ca2c5c04ee39f2b555"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#aba22797a790706ca2c5c04ee39f2b555">Context</a> ()</td></tr>
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<tr class="memdesc:aba22797a790706ca2c5c04ee39f2b555"><td class="mdescLeft"> </td><td class="mdescRight">Default constructor. <a href="#aba22797a790706ca2c5c04ee39f2b555">More...</a><br /></td></tr>
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<tr class="separator:aba22797a790706ca2c5c04ee39f2b555"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a805b1bbdb3e52b1fda7c9bf2cd6ca86b"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#a805b1bbdb3e52b1fda7c9bf2cd6ca86b">~Context</a> ()</td></tr>
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<tr class="memdesc:a805b1bbdb3e52b1fda7c9bf2cd6ca86b"><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <a href="#a805b1bbdb3e52b1fda7c9bf2cd6ca86b">More...</a><br /></td></tr>
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<tr class="separator:a805b1bbdb3e52b1fda7c9bf2cd6ca86b"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a0806f915ea81ae1f4e8135a7a3696562"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#a0806f915ea81ae1f4e8135a7a3696562">setActive</a> (bool active)</td></tr>
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<tr class="memdesc:a0806f915ea81ae1f4e8135a7a3696562"><td class="mdescLeft"> </td><td class="mdescRight">Activate or deactivate explicitly the context. <a href="#a0806f915ea81ae1f4e8135a7a3696562">More...</a><br /></td></tr>
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<tr class="separator:a0806f915ea81ae1f4e8135a7a3696562"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a2cc81c5466553d1901f660d866b4b48b"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="structsf_1_1ContextSettings.html">ContextSettings</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#a2cc81c5466553d1901f660d866b4b48b">getSettings</a> () const</td></tr>
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<tr class="memdesc:a2cc81c5466553d1901f660d866b4b48b"><td class="mdescLeft"> </td><td class="mdescRight">Get the settings of the context. <a href="#a2cc81c5466553d1901f660d866b4b48b">More...</a><br /></td></tr>
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<tr class="separator:a2cc81c5466553d1901f660d866b4b48b"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a2a9e3529e48919120e6b6fc10bad296c"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#a2a9e3529e48919120e6b6fc10bad296c">Context</a> (const <a class="el" href="structsf_1_1ContextSettings.html">ContextSettings</a> &settings, unsigned int width, unsigned int height)</td></tr>
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<tr class="memdesc:a2a9e3529e48919120e6b6fc10bad296c"><td class="mdescLeft"> </td><td class="mdescRight">Construct a in-memory context. <a href="#a2a9e3529e48919120e6b6fc10bad296c">More...</a><br /></td></tr>
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<tr class="separator:a2a9e3529e48919120e6b6fc10bad296c"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
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Static Public Member Functions</h2></td></tr>
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<tr class="memitem:a163c7f72c0c20133606657d895faa147"><td class="memItemLeft" align="right" valign="top">static bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#a163c7f72c0c20133606657d895faa147">isExtensionAvailable</a> (const char *name)</td></tr>
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<tr class="memdesc:a163c7f72c0c20133606657d895faa147"><td class="mdescLeft"> </td><td class="mdescRight">Check whether a given OpenGL extension is available. <a href="#a163c7f72c0c20133606657d895faa147">More...</a><br /></td></tr>
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<tr class="separator:a163c7f72c0c20133606657d895faa147"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a998980d311effdf6223ce40d934c23c3"><td class="memItemLeft" align="right" valign="top">static GlFunctionPointer </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#a998980d311effdf6223ce40d934c23c3">getFunction</a> (const char *name)</td></tr>
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<tr class="memdesc:a998980d311effdf6223ce40d934c23c3"><td class="mdescLeft"> </td><td class="mdescRight">Get the address of an OpenGL function. <a href="#a998980d311effdf6223ce40d934c23c3">More...</a><br /></td></tr>
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<tr class="separator:a998980d311effdf6223ce40d934c23c3"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a26ec3ddaf11a37c0630624037c4eea2d"><td class="memItemLeft" align="right" valign="top">static const <a class="el" href="classsf_1_1Context.html">Context</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#a26ec3ddaf11a37c0630624037c4eea2d">getActiveContext</a> ()</td></tr>
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<tr class="memdesc:a26ec3ddaf11a37c0630624037c4eea2d"><td class="mdescLeft"> </td><td class="mdescRight">Get the currently active context. <a href="#a26ec3ddaf11a37c0630624037c4eea2d">More...</a><br /></td></tr>
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<tr class="separator:a26ec3ddaf11a37c0630624037c4eea2d"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a61b1cb0a99b8e3ce56579d70aa41fb70"><td class="memItemLeft" align="right" valign="top">static Uint64 </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Context.html#a61b1cb0a99b8e3ce56579d70aa41fb70">getActiveContextId</a> ()</td></tr>
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<tr class="memdesc:a61b1cb0a99b8e3ce56579d70aa41fb70"><td class="mdescLeft"> </td><td class="mdescRight">Get the currently active context's ID. <a href="#a61b1cb0a99b8e3ce56579d70aa41fb70">More...</a><br /></td></tr>
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<tr class="separator:a61b1cb0a99b8e3ce56579d70aa41fb70"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-static-methods"></a>
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Static Private Member Functions</h2></td></tr>
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<tr class="memitem:ab171bdaf5eb36789da14b30a846db471"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1GlResource.html#ab171bdaf5eb36789da14b30a846db471">registerContextDestroyCallback</a> (ContextDestroyCallback callback, void *arg)</td></tr>
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<tr class="memdesc:ab171bdaf5eb36789da14b30a846db471"><td class="mdescLeft"> </td><td class="mdescRight">Register a function to be called when a context is destroyed. <a href="#ab171bdaf5eb36789da14b30a846db471">More...</a><br /></td></tr>
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<tr class="separator:ab171bdaf5eb36789da14b30a846db471"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Class holding a valid drawing context. </p>
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<p>If you need to make OpenGL calls without having an active window (like in a thread), you can use an instance of this class to get a valid context.</p>
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<p>Having a valid context is necessary for <em>every</em> OpenGL call.</p>
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<p>Note that a context is only active in its current thread, if you create a new thread it will have no valid context by default.</p>
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<p>To use a <a class="el" href="classsf_1_1Context.html" title="Class holding a valid drawing context. ">sf::Context</a> instance, just construct it and let it live as long as you need a valid context. No explicit activation is needed, all it has to do is to exist. Its destructor will take care of deactivating and freeing all the attached resources.</p>
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<p>Usage example: </p><div class="fragment"><div class="line"><span class="keywordtype">void</span> threadFunction(<span class="keywordtype">void</span>*)</div><div class="line">{</div><div class="line"> <a class="code" href="classsf_1_1Context.html">sf::Context</a> context;</div><div class="line"> <span class="comment">// from now on, you have a valid context</span></div><div class="line"></div><div class="line"> <span class="comment">// you can make OpenGL calls</span></div><div class="line"> glClear(GL_DEPTH_BUFFER_BIT);</div><div class="line">}</div><div class="line"><span class="comment">// the context is automatically deactivated and destroyed</span></div><div class="line"><span class="comment">// by the sf::Context destructor</span></div></div><!-- fragment -->
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<p class="definition">Definition at line <a class="el" href="Context_8hpp_source.html#l00050">50</a> of file <a class="el" href="Context_8hpp_source.html">Context.hpp</a>.</p>
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</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<a id="aba22797a790706ca2c5c04ee39f2b555"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#aba22797a790706ca2c5c04ee39f2b555">◆ </a></span>Context() <span class="overload">[1/2]</span></h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">sf::Context::Context </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Default constructor. </p>
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<p>The constructor creates and activates the context </p>
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</div>
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</div>
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<a id="a805b1bbdb3e52b1fda7c9bf2cd6ca86b"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a805b1bbdb3e52b1fda7c9bf2cd6ca86b">◆ </a></span>~Context()</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">sf::Context::~Context </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Destructor. </p>
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<p>The destructor deactivates and destroys the context </p>
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</div>
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</div>
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<a id="a2a9e3529e48919120e6b6fc10bad296c"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a2a9e3529e48919120e6b6fc10bad296c">◆ </a></span>Context() <span class="overload">[2/2]</span></h2>
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<div class="memitem">
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<td class="memname">sf::Context::Context </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="structsf_1_1ContextSettings.html">ContextSettings</a> & </td>
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<td class="paramname"><em>settings</em>, </td>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">unsigned int </td>
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<td class="paramname"><em>width</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">unsigned int </td>
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<td class="paramname"><em>height</em> </td>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Construct a in-memory context. </p>
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<p>This constructor is for internal use, you don't need to bother with it.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">settings</td><td>Creation parameters </td></tr>
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<tr><td class="paramname">width</td><td>Back buffer width </td></tr>
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<tr><td class="paramname">height</td><td>Back buffer height </td></tr>
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</table>
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</dd>
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</div>
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</div>
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<h2 class="groupheader">Member Function Documentation</h2>
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<a id="a26ec3ddaf11a37c0630624037c4eea2d"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a26ec3ddaf11a37c0630624037c4eea2d">◆ </a></span>getActiveContext()</h2>
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<td class="memname">static const <a class="el" href="classsf_1_1Context.html">Context</a>* sf::Context::getActiveContext </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>Get the currently active context. </p>
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<p>This function will only return <a class="el" href="classsf_1_1Context.html" title="Class holding a valid drawing context. ">sf::Context</a> objects. Contexts created e.g. by RenderTargets or for internal use will not be returned by this function.</p>
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<dl class="section return"><dt>Returns</dt><dd>The currently active context or NULL if none is active </dd></dl>
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<a id="a61b1cb0a99b8e3ce56579d70aa41fb70"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a61b1cb0a99b8e3ce56579d70aa41fb70">◆ </a></span>getActiveContextId()</h2>
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<td class="memname">static Uint64 sf::Context::getActiveContextId </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>Get the currently active context's ID. </p>
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<p>The context ID is used to identify contexts when managing unshareable OpenGL resources.</p>
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<dl class="section return"><dt>Returns</dt><dd>The active context's ID or 0 if no context is currently active </dd></dl>
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<a id="a998980d311effdf6223ce40d934c23c3"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a998980d311effdf6223ce40d934c23c3">◆ </a></span>getFunction()</h2>
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<td class="memname">static GlFunctionPointer sf::Context::getFunction </td>
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<td>(</td>
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<td class="paramtype">const char * </td>
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<td class="paramname"><em>name</em></td><td>)</td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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</div><div class="memdoc">
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<p>Get the address of an OpenGL function. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">name</td><td>Name of the function to get the address of</td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>Address of the OpenGL function, 0 on failure </dd></dl>
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<a id="a2cc81c5466553d1901f660d866b4b48b"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a2cc81c5466553d1901f660d866b4b48b">◆ </a></span>getSettings()</h2>
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<td class="memname">const <a class="el" href="structsf_1_1ContextSettings.html">ContextSettings</a>& sf::Context::getSettings </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td> const</td>
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<p>Get the settings of the context. </p>
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<p>Note that these settings may be different than the ones passed to the constructor; they are indeed adjusted if the original settings are not directly supported by the system.</p>
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<dl class="section return"><dt>Returns</dt><dd>Structure containing the settings </dd></dl>
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</div>
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<a id="a163c7f72c0c20133606657d895faa147"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a163c7f72c0c20133606657d895faa147">◆ </a></span>isExtensionAvailable()</h2>
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<td class="memname">static bool sf::Context::isExtensionAvailable </td>
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<td>(</td>
|
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<td class="paramtype">const char * </td>
|
||
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<td class="paramname"><em>name</em></td><td>)</td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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</div><div class="memdoc">
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<p>Check whether a given OpenGL extension is available. </p>
|
||
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<dl class="params"><dt>Parameters</dt><dd>
|
||
|
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<table class="params">
|
||
|
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<tr><td class="paramname">name</td><td>Name of the extension to check for</td></tr>
|
||
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|
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|
||
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</dl>
|
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<dl class="section return"><dt>Returns</dt><dd>True if available, false if unavailable </dd></dl>
|
||
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|
||
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</div>
|
||
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</div>
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<a id="a0806f915ea81ae1f4e8135a7a3696562"></a>
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||
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<h2 class="memtitle"><span class="permalink"><a href="#a0806f915ea81ae1f4e8135a7a3696562">◆ </a></span>setActive()</h2>
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<td class="memname">bool sf::Context::setActive </td>
|
||
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<td>(</td>
|
||
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<td class="paramtype">bool </td>
|
||
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<td class="paramname"><em>active</em></td><td>)</td>
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||
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|
||
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<p>Activate or deactivate explicitly the context. </p>
|
||
|
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<dl class="params"><dt>Parameters</dt><dd>
|
||
|
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<table class="params">
|
||
|
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<tr><td class="paramname">active</td><td>True to activate, false to deactivate</td></tr>
|
||
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|
||
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</dd>
|
||
|
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|
||
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<dl class="section return"><dt>Returns</dt><dd>True on success, false on failure </dd></dl>
|
||
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|
||
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|
||
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</div>
|
||
|
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<hr/>The documentation for this class was generated from the following file:<ul>
|
||
|
|
<li><a class="el" href="Context_8hpp_source.html">Context.hpp</a></li>
|
||
|
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</ul>
|
||
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</div><!-- contents -->
|
||
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</div>
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||
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<div id="footer-container">
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||
|
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<div id="footer">
|
||
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SFML is licensed under the terms and conditions of the <a href="https://www.sfml-dev.org/license.php">zlib/png license</a>.<br>
|
||
|
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Copyright © Laurent Gomila ::
|
||
|
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Documentation generated by <a href="http://www.doxygen.org/" title="doxygen website">doxygen</a> ::
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