<div class="refentry" lang="en" xml:lang="en"><a id="glCallLists"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glCallLists — execute a list of display lists</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glCallLists</b>(</code></td><td>GLsizei  </td><td><var class="pdparam">n</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">type</var>, </td></tr><tr><td> </td><td>const GLvoid *  </td><td><var class="pdparam">lists</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>n</code></em></span></dt><dd><p>

Specifies the number of display lists to be executed.

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

Specifies the type of values in <em class="parameter"><code>lists</code></em>.

Symbolic constants

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

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

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

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

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

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

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

<code class="constant">GL_2_BYTES</code>,

<code class="constant">GL_3_BYTES</code>, and

<code class="constant">GL_4_BYTES</code> are accepted.

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

Specifies the address of an array of name offsets in the display list.

The pointer type is void because the offsets can be bytes,

shorts,

ints,

or floats,

depending on the value of <em class="parameter"><code>type</code></em>.

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

<code class="function">glCallLists</code> causes each display list in the list of names passed as <em class="parameter"><code>lists</code></em>

to be executed.

As a result,

the commands saved in each display list are executed in order,

just as if they were called without using a display list.

Names of display lists that have not been defined are ignored.

</p><p>

<code class="function">glCallLists</code> provides an efficient means for executing more than one display list.

<em class="parameter"><code>type</code></em> allows lists with various name formats to be accepted.

The formats are as

follows:

</p><div class="variablelist"><dl><dt><span class="term"><code class="constant">GL_BYTE</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of signed bytes,

each in the range

<math overflow="scroll">

<mn>-128</mn>

</math>

through 127.

</p></dd><dt><span class="term"><code class="constant">GL_UNSIGNED_BYTE</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of unsigned bytes,

each in the range 0 through 255.

</p></dd><dt><span class="term"><code class="constant">GL_SHORT</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of signed two-byte integers,

each in the range

<math overflow="scroll">

<mn>-32768</mn>

</math>

through 32767.

</p></dd><dt><span class="term"><code class="constant">GL_UNSIGNED_SHORT</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of unsigned two-byte integers,

each in the range 0 through 65535.

</p></dd><dt><span class="term"><code class="constant">GL_INT</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of signed four-byte integers.

</p></dd><dt><span class="term"><code class="constant">GL_UNSIGNED_INT</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of unsigned four-byte integers.

</p></dd><dt><span class="term"><code class="constant">GL_FLOAT</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of four-byte floating-point values.

</p></dd><dt><span class="term"><code class="constant">GL_2_BYTES</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of unsigned bytes.

Each pair of bytes specifies a single display-list name.

The value of the pair is computed as 256 times the unsigned value

of the first byte plus the unsigned value of the second byte.

</p></dd><dt><span class="term"><code class="constant">GL_3_BYTES</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of unsigned bytes.

Each triplet of bytes specifies a single display-list name.

The value of the triplet is computed as 65536 times the unsigned value

of the first byte,

plus 256 times the unsigned value of the second byte,

plus the unsigned value of the third byte.

</p></dd><dt><span class="term"><code class="constant">GL_4_BYTES</code></span></dt><dd><p>

<em class="parameter"><code>lists</code></em> is treated as an array of unsigned bytes.

Each quadruplet of bytes specifies a single display-list name.

The value of the quadruplet is computed as 16777216 times the unsigned value

of the first byte,

plus 65536 times the unsigned value of the second byte,

plus 256 times the unsigned value of the third byte,

plus the unsigned value of the fourth byte.

</p></dd></dl></div><p>

The list of display-list names is not null-terminated.

Rather,

<em class="parameter"><code>n</code></em> specifies how many names are to be taken from <em class="parameter"><code>lists</code></em>.

</p><p>

An additional level of indirection is made available with the

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

which specifies an unsigned offset that is added to each display-list

name specified in <em class="parameter"><code>lists</code></em> before that display list is executed.

</p><p>

<code class="function">glCallLists</code> can appear inside a display list.

To avoid the possibility of infinite recursion resulting from display lists

calling one another,

a limit is placed on the nesting level of display

lists during display-list execution.

This limit must be at least 64, and it depends on the implementation.

</p><p>

GL state is not saved and restored across a call to <code class="function">glCallLists</code>.

Thus,

changes made to GL state during the execution of the display lists

remain after execution is completed.

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

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

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

and <a class="citerefentry" href="glPopMatrix"><span class="citerefentry"><span class="refentrytitle">glPopMatrix</span></span></a> to preserve GL state across <code class="function">glCallLists</code> calls.

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

Display lists can be executed between a call to <a class="citerefentry" href="glBegin"><span class="citerefentry"><span class="refentrytitle">glBegin</span></span></a>

and the corresponding call to <a class="citerefentry" href="glEnd"><span class="citerefentry"><span class="refentrytitle">glEnd</span></span></a>,

as long as the display list includes only commands that are allowed

in this interval.

</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>n</code></em> is negative.

</p><p>

<code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>type</code></em> is not one of

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

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

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

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

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

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

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

<code class="constant">GL_2_BYTES</code>,

<code class="constant">GL_3_BYTES</code>,

<code class="constant">GL_4_BYTES</code>.

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

<a class="citerefentry" href="glGet"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_LIST_BASE</code>

</p><p>

<a class="citerefentry" href="glGet"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_MAX_LIST_NESTING</code>

</p><p>

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

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

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

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

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

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

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