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<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
<!-- Converted by db4-upgrade version 1.1 -->
<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glDrawRangeElementsBaseVertex">
<info>
<copyright>
<year>2010-2014</year>
<holder>Khronos Group</holder>
</copyright>
</info>
<refmeta>
<refentrytitle>glDrawRangeElementsBaseVertex</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glDrawRangeElementsBaseVertex</refname>
<refpurpose>render primitives from array data with a per-element offset</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glDrawRangeElementsBaseVertex</function></funcdef>
<paramdef>GLenum <parameter>mode</parameter></paramdef>
<paramdef>GLuint <parameter>start</parameter></paramdef>
<paramdef>GLuint <parameter>end</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>GLenum <parameter>type</parameter></paramdef>
<paramdef>GLvoid *<parameter>indices</parameter></paramdef>
<paramdef>GLint <parameter>basevertex</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 xml:id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>mode</parameter></term>
<listitem>
<para>
Specifies what kind of primitives to render.
Symbolic constants
<constant>GL_POINTS</constant>, <constant>GL_LINE_STRIP</constant>, <constant>GL_LINE_LOOP</constant>,
<constant>GL_LINES</constant>, <constant>GL_TRIANGLE_STRIP</constant>, <constant>GL_TRIANGLE_FAN</constant>,
<constant>GL_TRIANGLES</constant>, <constant>GL_LINES_ADJACENCY</constant>, <constant>GL_LINE_STRIP_ADJACENCY</constant>,
<constant>GL_TRIANGLES_ADJACENCY</constant>, <constant>GL_TRIANGLE_STRIP_ADJACENCY</constant> and <constant>GL_PATCHES</constant> are accepted.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>start</parameter></term>
<listitem>
<para>
Specifies the minimum array index contained in <parameter>indices</parameter>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>end</parameter></term>
<listitem>
<para>
Specifies the maximum array index contained in <parameter>indices</parameter>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>count</parameter></term>
<listitem>
<para>
Specifies the number of elements to be rendered.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>type</parameter></term>
<listitem>
<para>
Specifies the type of the values in indices. Must be one of <constant>GL_UNSIGNED_BYTE</constant>,
<constant>GL_UNSIGNED_SHORT</constant>, or <constant>GL_UNSIGNED_INT</constant>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>indices</parameter></term>
<listitem>
<para>
Specifies a pointer to the location where the indices are stored.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>basevertex</parameter></term>
<listitem>
<para>
Specifies a constant that should be added to each element of <parameter>indices</parameter>
when chosing elements from the enabled vertex arrays.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 xml:id="description"><title>Description</title>
<para>
<function>glDrawRangeElementsBaseVertex</function> is a restricted form of
<citerefentry><refentrytitle>glDrawElementsBaseVertex</refentrytitle></citerefentry>. <parameter>mode</parameter>,
<parameter>start</parameter>, <parameter>end</parameter>, <parameter>count</parameter> and <parameter>basevertex</parameter> match
the corresponding arguments to <citerefentry><refentrytitle>glDrawElementsBaseVertex</refentrytitle></citerefentry>, with the additional
constraint that all values in the array <parameter>indices</parameter> must lie between <parameter>start</parameter> and <parameter>end</parameter>,
inclusive, prior to adding <parameter>basevertex</parameter>. Index values lying outside the range [<parameter>start</parameter>, <parameter>end</parameter>]
are treated in the same way as <citerefentry><refentrytitle>glDrawElementsBaseVertex</refentrytitle></citerefentry>. The <emphasis>i</emphasis>th element
transferred by the corresponding draw call will be taken from element <parameter>indices</parameter>[i] + <parameter>basevertex</parameter> of each enabled
array. If the resulting value is larger than the maximum value representable by <parameter>type</parameter>, it is as if the calculation were upconverted to
32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.
</para>
</refsect1>
<refsect1 xml:id="errors"><title>Errors</title>
<para>
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>mode</parameter> is not an accepted value.
</para>
<para>
<constant>GL_INVALID_VALUE</constant> is generated if <parameter>count</parameter> is negative.
</para>
<para>
<constant>GL_INVALID_VALUE</constant> is generated if <parameter>end</parameter> < <parameter>start</parameter>.
</para>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated if a geometry shader is active and <parameter>mode</parameter>
is incompatible with the input primitive type of the geometry shader in the currently installed program object.
</para>
<para>
<constant>GL_INVALID_OPERATION</constant> is generated if a non-zero buffer object name is bound to an
enabled array or the element array and the buffer object's data store is currently mapped.
</para>
</refsect1>
<refsect1 xml:id="versions"><title>Version Support</title>
<informaltable>
<tgroup cols="13" align="left">
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
<tbody>
<row>
<entry><function>glDrawRangeElementsBaseVertex</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='32']/*)"/>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 xml:id="seealso"><title>See Also</title>
<para>
<citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawElementsBaseVertex</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawElementsInstanced</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawElementsInstancedBaseVertex</refentrytitle></citerefentry>
</para>
</refsect1>
<refsect1 xml:id="Copyright"><title>Copyright</title>
<para>
Copyright <trademark class="copyright"/> 2010-2014 Khronos Group.
This material may be distributed subject to the terms and conditions set forth in
the Open Publication License, v 1.0, 8 June 1999.
<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
</para>
</refsect1>
</refentry>
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