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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="glScissorArray">
<info>
<copyright>
<year>2010-2014</year>
<holder>Khronos Group</holder>
</copyright>
</info>
<refmeta>
<refentrytitle>glScissorArray</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glScissorArray</refname>
<refpurpose>define the scissor box for multiple viewports</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glScissorArrayv</function></funcdef>
<paramdef>GLuint <parameter>first</parameter></paramdef>
<paramdef>GLsizei <parameter>count</parameter></paramdef>
<paramdef>const GLint *<parameter>v</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 xml:id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>first</parameter></term>
<listitem>
<para>
Specifies the index of the first viewport whose scissor box to modify.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>count</parameter></term>
<listitem>
<para>
Specifies the number of scissor boxes to modify.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>v</parameter></term>
<listitem>
<para>
Specifies the address of an array containing the left, bottom, width and height of each
scissor box, in that order.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 xml:id="description"><title>Description</title>
<para>
<function>glScissorArrayv</function> defines rectangles, called scissor boxes,
in window coordinates for each viewport.
<parameter>first</parameter> specifies the index of the first scissor box to modify and
<parameter>count</parameter> specifies the number of scissor boxes to modify. <parameter>first</parameter>
must be less than the value of <constant>GL_MAX_VIEWPORTS</constant>, and <parameter>first</parameter> +
<parameter>count</parameter> must be less than or equal to the value of <constant>GL_MAX_VIEWPORTS</constant>.
<parameter>v</parameter> specifies the address of an array containing integers specifying the
lower left corner of the scissor boxes, and the width and height of the scissor boxes, in that order.
</para>
<para>
To enable and disable the scissor test, call
<citerefentry><refentrytitle>glEnable</refentrytitle></citerefentry> and <!-- FIX: link to glEnable --> <function>glDisable</function> with argument
<constant>GL_SCISSOR_TEST</constant>. The test is initially disabled for all viewports.
While the test is enabled, only pixels that lie within the scissor box
can be modified by drawing commands.
Window coordinates have integer values at the shared corners of
frame buffer pixels.
<code>glScissor(0,0,1,1)</code> allows modification of only the lower left
pixel in the window, and <code>glScissor(0,0,0,0)</code> doesn't allow
modification of any pixels in the window.
</para>
<para>
When the scissor test is disabled,
it is as though the scissor box includes the entire window.
</para>
</refsect1>
<refsect1 xml:id="errors"><title>Errors</title>
<para>
<constant>GL_INVALID_VALUE</constant> is generated if <parameter>first</parameter> is greater than or equal to
the value of <constant>GL_MAX_VIEWPORTS</constant>.
</para>
<para>
<constant>GL_INVALID_VALUE</constant> is generated if <parameter>first</parameter> + <parameter>count</parameter>
is greater than or equal to the value of <constant>GL_MAX_VIEWPORTS</constant>.
</para>
<para>
<constant>GL_INVALID_VALUE</constant> is generated if any width or height specified in the array <parameter>v</parameter> is negative.
</para>
</refsect1>
<refsect1 xml:id="associatedgets"><title>Associated Gets</title>
<para>
<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_SCISSOR_BOX</constant>
</para>
<para>
<citerefentry><refentrytitle>glIsEnabled</refentrytitle></citerefentry> with argument <constant>GL_SCISSOR_TEST</constant>
</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>glScissorArrayv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='41']/*)"/>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 xml:id="seealso"><title>See Also</title>
<para>
<citerefentry><refentrytitle>glEnable</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glViewport</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glViewportIndexed</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glViewportArray</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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