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authorDavid Thompson <dthompson@vistahigherlearning.com>2019-06-02 20:50:28 -0400
committerDavid Thompson <dthompson@vistahigherlearning.com>2019-06-02 20:50:28 -0400
commitb421d4e7e06f977436b6e6195b95ca44d884e0c0 (patch)
treecd6e040b7d0fea82b5f766d1508c7278ff50fac0 /manuals/guile-sdl2/OpenGL.html
parent179da31b16bcf711c14020ec85472c145fc4be51 (diff)
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+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- Copyright (C) 2016 David Thompson davet@gnu.org
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+<title>OpenGL (Guile-SDL2)</title>
+
+<meta name="description" content="OpenGL (Guile-SDL2)">
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+<link href="Window-Management.html#Window-Management" rel="up" title="Window Management">
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+<a name="OpenGL"></a>
+<div class="header">
+<p>
+Previous: <a href="Windows.html#Windows" accesskey="p" rel="prev">Windows</a>, Up: <a href="Window-Management.html#Window-Management" accesskey="u" rel="up">Window Management</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="OpenGL-1"></a>
+<h4 class="subsection">3.2.2 OpenGL</h4>
+
+<dl>
+<dt><a name="index-make_002dgl_002dcontext"></a>Procedure: <strong>make-gl-context</strong> <em>window</em></dt>
+<dd><p>Create an OpenGL context for <var>window</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-delete_002dgl_002dcontext_0021"></a>Procedure: <strong>delete-gl-context!</strong> <em>context</em></dt>
+<dd><p>Delete <var>context</var>, an OpenGL context object.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-call_002dwith_002dgl_002dcontext"></a>Procedure: <strong>call-with-gl-context</strong> <em>window proc</em></dt>
+<dd><p>Call <var>proc</var> with a new OpenGL context created for <var>window</var>, and
+close the context when <var>proc</var> returns or otherwise exits.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-swap_002dgl_002dwindow"></a>Procedure: <strong>swap-gl-window</strong> <em>window</em></dt>
+<dd><p>Update <var>window</var> with OpenGL rendering.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-set_002dgl_002dattribute_0021"></a>Procedure: <strong>set-gl-attribute!</strong> <em>attr value</em></dt>
+<dd><p>Set the OpenGL attribute represented by the symbol <var>attr</var> to
+<var>value</var>. Possible values for <var>attr</var> are:
+</p>
+<ul>
+<li> <code>red-size</code>
+</li><li> <code>green-size</code>
+</li><li> <code>blue-size</code>
+</li><li> <code>alpha-size</code>
+</li><li> <code>buffer-size</code>
+</li><li> <code>double-buffer</code>
+</li><li> <code>depth-size</code>
+</li><li> <code>stencil-size</code>
+</li><li> <code>accum-red-size</code>
+</li><li> <code>accum-green-size</code>
+</li><li> <code>accum-blue-size</code>
+</li><li> <code>stereo</code>
+</li><li> <code>multisample-buffers</code>
+</li><li> <code>multisample-samples</code>
+</li><li> <code>retained-backing</code>
+</li><li> <code>context-major-version</code>
+</li><li> <code>context-minor-version</code>
+</li><li> <code>context-egl</code>
+</li><li> <code>context-flags</code>
+</li><li> <code>context-profile-mask</code>
+</li><li> <code>share-with-current-context</code>
+</li><li> <code>framebuffer-srgb-capable</code>
+</li></ul>
+
+</dd></dl>
+
+<dl>
+<dt><a name="index-set_002dgl_002dswap_002dinterval_0021"></a>Procedure: <strong>set-gl-swap-interval!</strong> <em>interval</em></dt>
+<dd><p>Set the framebuffer swap interval for the current OpenGL context to the
+type indicated by the symbol <var>interval</var>. Possible values of
+<var>interval</var> are:
+</p>
+<ul>
+<li> <code>immediate</code>, for immediate updates
+</li><li> <code>vsync</code>, for updates synchronized with the screen&rsquo;s vertical retrace
+</li><li> <code>late-swap-tear</code>, for late swap tearing
+</li></ul>
+
+<p>Late swap tearing works the same as vsync, but if the vertical retrace
+has been missed for a given frame, buffers are swapped immediately,
+which might be less jarring for the user during occasional framerate
+drops.
+</p></dd></dl>
+
+
+
+
+</body>
+</html>
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