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4 Reference Pages
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.69.1" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"glUniformBlockBinding"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glUniformBlockBinding — assign a binding point to an active uniform block
</p></div><div class=
"refsynopsisdiv"><h2>C Specification
</h2><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0"><tr><td><code class=
"funcdef">void
<b class=
"fsfunc">glUniformBlockBinding
</b>(
</code></td><td>GLuint
</td><td><var class=
"pdparam">program
</var>,
</td></tr><tr><td> </td><td>GLuint
</td><td><var class=
"pdparam">uniformBlockIndex
</var>,
</td></tr><tr><td> </td><td>GLuint
</td><td><var class=
"pdparam">uniformBlockBinding
</var><code>)
</code>;
</td></tr></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"parameters"></a><h2>Parameters
</h2><div class=
"variablelist"><dl><dt><span class=
"term"><em class=
"parameter"><code>program
</code></em></span></dt><dd><p>
5 The name of a program object containing the active uniform block whose binding to assign.
6 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>uniformBlockIndex
</code></em></span></dt><dd><p>
7 The index of the active uniform block within
<em class=
"parameter"><code>program
</code></em> whose binding to assign.
8 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>uniformBlockBinding
</code></em></span></dt><dd><p>
9 Specifies the binding point to which to bind the uniform block with index
<em class=
"parameter"><code>uniformBlockIndex
</code></em> within
<em class=
"parameter"><code>program
</code></em>.
10 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
11 Binding points for active uniform blocks are assigned using
<code class=
"function">glUniformBlockBinding
</code>. Each of a program's active uniform
12 blocks has a corresponding uniform buffer binding point.
<em class=
"parameter"><code>program
</code></em> is the name of a program object for which the command
13 <a href=
"glLinkProgram.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLinkProgram
</span></span></a> has been issued in the past.
15 If successful,
<code class=
"function">glUniformBlockBinding
</code> specifies that
<em class=
"parameter"><code>program
</code></em> will use the data store of the
16 buffer object bound to the binding point
<em class=
"parameter"><code>uniformBlockBinding
</code></em> to extract the values of the uniforms in the
17 uniform block identified by
<em class=
"parameter"><code>uniformBlockIndex
</code></em>.
19 When a program object is linked or re-linked, the uniform buffer object binding point assigned to each of its active uniform blocks is reset to zero.
20 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
21 <code class=
"constant">GL_INVALID_VALUE
</code> is generated if
<em class=
"parameter"><code>uniformBlockIndex
</code></em> is not an active uniform block index of
<em class=
"parameter"><code>program
</code></em>.
23 <code class=
"constant">GL_INVALID_VALUE
</code> is generated if
<em class=
"parameter"><code>uniformBlockBinding
</code></em> is greater than or equal to the value of
<code class=
"constant">GL_MAX_UNIFORM_BUFFER_BINDINGS
</code>.
25 <code class=
"constant">GL_INVALID_VALUE
</code> is generated
<em class=
"parameter"><code>program
</code></em> is not the name of a program object generated by the GL.
26 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
27 <code class=
"function">glUniformBlockBinding
</code> is available only if the GL version is
3.1 or greater.
28 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"associatedgets"></a><h2>Associated Gets
</h2><p>
29 <a href=
"glGetActiveUniformBlock.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGetActiveUniformBlock
</span></span></a> with argument
<code class=
"constant">GL_UNIFORM_BLOCK_BINDING
</code>
30 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
31 <a href=
"glLinkProgram.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLinkProgram
</span></span></a>,
32 <a href=
"glBindBufferBase.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBindBufferBase
</span></span></a>,
33 <a href=
"glBindBufferRange.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBindBufferRange
</span></span></a>,
34 <a href=
"glGetActiveUniformBlock.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGetActiveUniformBlock
</span></span></a>
35 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
36 Copyright
<span class=
"trademark"></span>©
2010 Khronos Group.
37 This material may be distributed subject to the terms and conditions set forth in
38 the Open Publication License, v
1.0,
8 June
1999.
39 <a href=
"http://opencontent.org/openpub/" target=
"_top">http://opencontent.org/openpub/
</a>.
40 </p></div></div></body></html>
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