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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=
"glBlendColor"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glBlendColor — set the blend color
</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">glBlendColor
</b>(
</code></td><td>GLfloat
</td><td><var class=
"pdparam">red
</var>,
</td></tr><tr><td> </td><td>GLfloat
</td><td><var class=
"pdparam">green
</var>,
</td></tr><tr><td> </td><td>GLfloat
</td><td><var class=
"pdparam">blue
</var>,
</td></tr><tr><td> </td><td>GLfloat
</td><td><var class=
"pdparam">alpha
</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>red
</code></em>,
</span><span class=
"term"><em class=
"parameter"><code>green
</code></em>,
</span><span class=
"term"><em class=
"parameter"><code>blue
</code></em>,
</span><span class=
"term"><em class=
"parameter"><code>alpha
</code></em></span></dt><dd><p>
5 specify the components of
<code class=
"constant">GL_BLEND_COLOR
</code>
6 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
7 The
<code class=
"constant">GL_BLEND_COLOR
</code> may be used to calculate the source and destination
8 blending factors. The color components are clamped to the range
9 <mml:math xmlns:
mml=
"http://www.w3.org/1998/Math/MathML" overflow=
"scroll">
11 <mml:mfenced open=
"[" close=
"]">
16 before being stored. See
<a href=
"glBlendFunc.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBlendFunc
</span></span></a> for a complete description of the
18 Initially the
<code class=
"constant">GL_BLEND_COLOR
</code> is set to (
0,
0,
0,
0).
19 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
20 The type of the
<em class=
"parameter"><code>red
</code></em>,
21 <em class=
"parameter"><code>green
</code></em>,
<em class=
"parameter"><code>blue
</code></em>,
22 and
<em class=
"parameter"><code>alpha
</code></em> parameters was changed from
23 GLclampf to GLfloat. This change is transparent to user code
24 and is described in detail on the
25 <a href=
"removedTypes.xml"><span class=
"citerefentry"><span class=
"refentrytitle">removedTypes
</span></span></a>
27 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"associatedgets"></a><h2>Associated Gets
</h2><p>
28 <a href=
"glGet.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGet
</span></span></a> with an argument of
<code class=
"constant">GL_BLEND_COLOR
</code>
29 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
30 <a href=
"glBlendEquation.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBlendEquation
</span></span></a>,
31 <a href=
"glBlendFunc.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBlendFunc
</span></span></a>,
32 <a href=
"glGetString.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGetString
</span></span></a>,
33 <a href=
"removedTypes.xml"><span class=
"citerefentry"><span class=
"refentrytitle">removedTypes
</span></span></a>
34 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
35 Copyright
<span class=
"trademark"></span>©
1991-
2006
36 Silicon Graphics, Inc. This document is licensed under the SGI
37 Free Software B License. For details, see
38 <a href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
39 </p></div></div></body></html>