<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><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"><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

<math overflow="scroll">

<mrow>

<mi mathvariant="italic">start</mi>

<mo>+</mo>

<mi mathvariant="italic">x</mi>

<mo>-</mo>

<mn>1</mn>

</mrow>

</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"><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

<math overflow="scroll">

<mrow>

<mrow>

<mi mathvariant="italic">start</mi>

<mo>+</mo>

<mi mathvariant="italic">x</mi>

</mrow>

<mo>&gt;</mo>

<mi mathvariant="italic">width</mi>

</mrow>

</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"><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="glGetColorTable"><span class="citerefentry"><span class="refentrytitle">glGetColorTable</span></span></a>,

<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="glColorSubTable"><span class="citerefentry"><span class="refentrytitle">glColorSubTable</span></span></a>,

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

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

<code class="function">glCopyColorSubTable</code>,

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