upstream-man-pages/man3/xhtml/glBlendColor.xml

   1 <?xml version="1.0" encoding="UTF-8"?>
   2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd">
   3 <!-- saved from url=(0013)about:internet -->
   4 <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glBlendColor</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>GLclampf  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLclampf  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLclampf  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLclampf  </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">
  10
  11                 <mml:mfenced open="[" close="]">
  12                     <mml:mn>0</mml:mn>
  13                     <mml:mn>1</mml:mn>
  14                 </mml:mfenced>
  15             </mml:math>
  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
  17             blending operations.
  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="associatedgets"></a><h2>Associated Gets</h2><p>
  20             <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>
  21         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
  22             <a href="glBlendEquation.xml"><span class="citerefentry"><span class="refentrytitle">glBlendEquation</span></span></a>,
  23             <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a>,
  24             <a href="glGetString.xml"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>
  25         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
  26             Copyright <span class="trademark"></span>© 1991-2006
  27             Silicon Graphics, Inc. This document is licensed under the SGI
  28             Free Software B License. For details, see
  29             <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
  30         </p></div></div></body></html>