<div class="refentry" lang="en" xml:lang="en"><a id="glColorTableParameter"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glColorTableParameter — set color lookup table parameters</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColorTableParameterfv</b>(</code></td><td>GLenum  </td><td><var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>const GLfloat *  </td><td><var class="pdparam">params</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColorTableParameteriv</b>(</code></td><td>GLenum  </td><td><var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>const GLint *  </td><td><var class="pdparam">params</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>target</code></em></span></dt><dd><p>

The target color table.

Must be

<code class="constant">GL_COLOR_TABLE</code>,

<code class="constant">GL_POST_CONVOLUTION_COLOR_TABLE</code>, or

<code class="constant">GL_POST_COLOR_MATRIX_COLOR_TABLE</code>.

</p></dd><dt><span class="term"><em class="parameter"><code>pname</code></em></span></dt><dd><p>

The symbolic name of a texture color lookup table parameter.

Must be one of

<code class="constant">GL_COLOR_TABLE_SCALE</code> or

<code class="constant">GL_COLOR_TABLE_BIAS</code>.

</p></dd><dt><span class="term"><em class="parameter"><code>params</code></em></span></dt><dd><p>

A pointer to an array where the values of the parameters are stored.

</p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>

<code class="function">glColorTableParameter</code> is used to specify the scale factors and bias terms applied to

color components when they are loaded into a color table. <em class="parameter"><code>target</code></em>

indicates which color table the scale and bias terms apply to; it

must be set to

<code class="constant">GL_COLOR_TABLE</code>,

<code class="constant">GL_POST_CONVOLUTION_COLOR_TABLE</code>, or

<code class="constant">GL_POST_COLOR_MATRIX_COLOR_TABLE</code>.

</p><p>

<em class="parameter"><code>pname</code></em> must be <code class="constant">GL_COLOR_TABLE_SCALE</code> to set the

scale factors.

In this case, <em class="parameter"><code>params</code></em> points to an array of four values, which are

the scale factors for red, green, blue, and alpha, in that order.

</p><p>

<em class="parameter"><code>pname</code></em> must be <code class="constant">GL_COLOR_TABLE_BIAS</code> to set the

bias terms. In this case,

<em class="parameter"><code>params</code></em> points to an array of four values, which are the bias

terms for red, green, blue, and alpha, in that order.

</p><p>

The color tables themselves are specified by

calling <a class="citerefentry" href="glColorTable"><span class="citerefentry"><span class="refentrytitle">glColorTable</span></span></a>.

</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>

<code class="function">glColorTableParameter</code> is available only if <code class="code">ARB_imaging</code> is returned from calling

<a class="citerefentry" href="glGetString"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a> with an argument of <code class="constant">GL_EXTENSIONS</code>.

</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>

<code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> or <em class="parameter"><code>pname</code></em> is not

an acceptable value.

</p><p>

<code class="constant">GL_INVALID_OPERATION</code> is generated if <code class="function">glColorTableParameter</code> is executed

between the execution of <a class="citerefentry" href="glBegin"><span class="citerefentry"><span class="refentrytitle">glBegin</span></span></a> and the corresponding

execution of <a class="citerefentry" href="glEnd"><span class="citerefentry"><span class="refentrytitle">glEnd</span></span></a>.

</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>

<a class="citerefentry" href="glGetColorTableParameter"><span class="citerefentry"><span class="refentrytitle">glGetColorTableParameter</span></span></a>

</p></div>

{$pipelinestall}{$examples}

<div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>

<a class="citerefentry" href="glColorTable"><span class="citerefentry"><span class="refentrytitle">glColorTable</span></span></a>,

<a class="citerefentry" href="glPixelTransfer"><span class="citerefentry"><span class="refentrytitle">glPixelTransfer</span></span></a>

</p></div><div class="refsect1" lang="en" xml:lang="en"><div id="Copyright"><h2>Copyright</h2><p>

Copyright © 1991-2006

Silicon Graphics, Inc. This document is licensed under the SGI

Free Software B License. For details, see

<a class="ulink" href="https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/" target="_top">https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/</a>.

</p></div></div></div>