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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>glCopyColorSubTable</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glCopyColorSubTable"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glCopyColorSubTable — respecify a portion of a color table</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">glCopyColorSubTable</b>(</code></td><td>GLenum  </td><td><var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLsizei  </td><td><var class="pdparam">start</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">x</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">y</var>, </td></tr><tr><td> </td><td>GLsizei  </td><td><var class="pdparam">width</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>
                    Must be one of
                    <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>start</code></em></span></dt><dd><p>
                    The starting index of the portion of the color table to be replaced.
                </p></dd><dt><span class="term"><em class="parameter"><code>x</code></em>, </span><span class="term"><em class="parameter"><code>y</code></em></span></dt><dd><p>
                    The window coordinates of the left corner of the row of pixels to be
                    copied.
                </p></dd><dt><span class="term"><em class="parameter"><code>width</code></em></span></dt><dd><p>
                    The number of table entries to replace.
                </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            <code class="function">glCopyColorSubTable</code> is used to respecify a contiguous portion of a color table previously
            defined using <a class="citerefentry" href="glColorTable.xml"><span class="citerefentry"><span class="refentrytitle">glColorTable</span></span></a>.  The pixels copied from the framebuffer
            replace the portion of the existing table from indices <em class="parameter"><code>start</code></em> to
            <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
                
                <mml:mrow>
                    <mml:mi mathvariant="italic">start</mml:mi>
                    <mml:mo>+</mml:mo>
                    <mml:mi mathvariant="italic">x</mml:mi>
                    <mml:mo>-</mml:mo>
                    <mml:mn>1</mml:mn>
                </mml:mrow>
            </mml:math>,
            inclusive.  This region may not include any
            entries outside the range of the color table, as was originally specified.
            It is not an error to specify a subtexture with width of 0, but such a
            specification has no effect.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>
            <code class="function">glCopyColorSubTable</code> is present only if <code class="code">ARB_imaging</code> is returned when <a class="citerefentry" href="glGetString.xml"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>
            is called 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_VALUE</code> is generated if <em class="parameter"><code>target</code></em> is not a previously defined
            color table.
        </p><p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>target</code></em> is not one of the allowable
            values.
        </p><p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if 
            <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
                
                <mml:mrow>
                    <mml:mrow>
                        <mml:mi mathvariant="italic">start</mml:mi>
                        <mml:mo>+</mml:mo>
                        <mml:mi mathvariant="italic">x</mml:mi>
                    </mml:mrow>
                    <mml:mo>&gt;</mml:mo>
                    <mml:mi mathvariant="italic">width</mml:mi>
                </mml:mrow>
            </mml:math>.
        </p><p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if <code class="function">glCopyColorSubTable</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" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
            <a class="citerefentry" href="glGetColorTable.xml"><span class="citerefentry"><span class="refentrytitle">glGetColorTable</span></span></a>,
            <a class="citerefentry" href="glGetColorTableParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetColorTableParameter</span></span></a>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a class="citerefentry" href="glColorSubTable.xml"><span class="citerefentry"><span class="refentrytitle">glColorSubTable</span></span></a>,
            <a class="citerefentry" href="glColorTableParameter.xml"><span class="citerefentry"><span class="refentrytitle">glColorTableParameter</span></span></a>,
            <a class="citerefentry" href="glCopyColorTable.xml"><span class="citerefentry"><span class="refentrytitle">glCopyColorTable</span></span></a>,
            <code class="function">glCopyColorSubTable</code>,
            <a class="citerefentry" href="glGetColorTable.xml"><span class="citerefentry"><span class="refentrytitle">glGetColorTable</span></span></a>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><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>
