1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Copyright (C) 2016, 2017, 2018, 2019 David Thompson davet@gnu.org
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
A copy of the license is included in the section entitled "GNU
Free Documentation License".
A copy of the license is also available from the Free Software
Foundation Web site at http://www.gnu.org/licenses/fdl.html.
* Guile-SDL2: (guile-sdl2). SDL2 bindings for Guile.
The document was typeset with
http://www.texinfo.org/ (GNU Texinfo).
-->
<!-- Created by GNU Texinfo 6.7, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>OpenGL (Guile-SDL2)</title>
<meta name="description" content="OpenGL (Guile-SDL2)">
<meta name="keywords" content="OpenGL (Guile-SDL2)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html" rel="start" title="Top">
<link href="Index.html" rel="index" title="Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Window-Management.html" rel="up" title="Window Management">
<link href="Input.html" rel="next" title="Input">
<link href="Windows.html" rel="prev" title="Windows">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
@media (min-width: 1140px) {
body {
margin-left: 14rem;
margin-right: 4rem;
max-width: 52rem;
}
}
@media (min-width: 800px) and (max-width: 1140px) {
body {
margin-left: 6rem;
margin-right: 4rem;
max-width: 52rem;
}
}
@media (max-width: 800px) {
body {
margin: 1rem;
}
}
-->
</style>
<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
</head>
<body lang="en">
<span id="OpenGL"></span><div class="header">
<p>
Previous: <a href="Windows.html" accesskey="p" rel="prev">Windows</a>, Up: <a href="Window-Management.html" accesskey="u" rel="up">Window Management</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<span id="OpenGL-1"></span><h4 class="subsection">3.2.2 OpenGL</h4>
<dl>
<dt id="index-make_002dgl_002dcontext">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 id="index-delete_002dgl_002dcontext_0021">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 id="index-call_002dwith_002dgl_002dcontext">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 id="index-swap_002dgl_002dwindow">Procedure: <strong>swap-gl-window</strong> <em>window</em></dt>
<dd><p>Update <var>window</var> with OpenGL rendering.
</p></dd></dl>
<dl>
<dt id="index-set_002dgl_002dattribute_0021">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 id="index-set_002dgl_002dswap_002dinterval_0021">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’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>
|
