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<?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" /><title>glColorTableParameter</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /></head><body><div class="refentry"><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 border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <strong class="fsfunc">glColorTableParameterfv</strong>(</code></td><td>GLenum <var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum <var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>const GLfloat * <var class="pdparam">params</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <strong class="fsfunc">glColorTableParameteriv</strong>(</code></td><td>GLenum <var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum <var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>const GLint * <var class="pdparam">params</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><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"><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.xml"><span class="citerefentry"><span class="refentrytitle">glColorTable</span></span></a>.
        </p></div><div class="refsect1"><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.xml"><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"><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.xml"><span class="citerefentry"><span class="refentrytitle">glBegin</span></span></a> and the corresponding
            execution of <a class="citerefentry" href="glEnd.xml"><span class="citerefentry"><span class="refentrytitle">glEnd</span></span></a>.
        </p></div><div class="refsect1"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
            <a class="citerefentry" href="glGetColorTableParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetColorTableParameter</span></span></a>
        </p></div><div class="refsect1"><a id="seealso"></a><h2>See Also</h2><p>
            <a class="citerefentry" href="glColorTable.xml"><span class="citerefentry"><span class="refentrytitle">glColorTable</span></span></a>,
            <a class="citerefentry" href="glPixelTransfer.xml"><span class="citerefentry"><span class="refentrytitle">glPixelTransfer</span></span></a>
        </p></div><div class="refsect1"><a id="Copyright"></a><h2>Copyright</h2><p>
            Copyright <span class="trademark"></span>© 1991-2006
            Silicon Graphics, Inc. This document is licensed under the SGI
            Free Software B License. For details, see
            <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
        </p></div></div></body></html>