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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" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glScissorArray - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glScissorArray"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glScissorArray — define the scissor box for multiple viewports</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">glScissorArrayv</b>(</code></td><td>GLuint  </td><td><var class="pdparam">first</var>, </td></tr><tr><td> </td><td>GLsizei  </td><td><var class="pdparam">count</var>, </td></tr><tr><td> </td><td>const GLint * </td><td><var class="pdparam">v</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>first</code></em></span></dt><dd><p>
                Specifies the index of the first viewport whose scissor box to modify.
            </p></dd><dt><span class="term"><em class="parameter"><code>count</code></em></span></dt><dd><p>
                Specifies the number of scissor boxes to modify.
            </p></dd><dt><span class="term"><em class="parameter"><code>v</code></em></span></dt><dd><p>
                Specifies the address of an array containing the left, bottom, width and height of each
                scissor box, in that order.
            </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            <code class="function">glScissorArrayv</code> defines rectangles, called scissor boxes,
            in window coordinates for each viewport.
            <em class="parameter"><code>first</code></em> specifies the index of the first scissor box to modify and
            <em class="parameter"><code>count</code></em> specifies the number of scissor boxes to modify. <em class="parameter"><code>first</code></em>
            must be less than the value of <code class="constant">GL_MAX_VIEWPORTS</code>, and <em class="parameter"><code>first</code></em> +
            <em class="parameter"><code>count</code></em> must be less than or equal to the value of <code class="constant">GL_MAX_VIEWPORTS</code>.
            <em class="parameter"><code>v</code></em> 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.
        </p><p>
            To enable and disable the scissor test, call
            <a href="glEnable.xml"><span class="citerefentry"><span class="refentrytitle">glEnable</span></span></a> and <a href="glDisable.xml"><span class="citerefentry"><span class="refentrytitle">glDisable</span></span></a> with argument
            <code class="constant">GL_SCISSOR_TEST</code>. 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 class="code">glScissor(0,0,1,1)</code> allows modification of only the lower left
            pixel in the window, and <code class="code">glScissor(0,0,0,0)</code> doesn't allow
            modification of any pixels in the window.
        </p><p>
            When the scissor test is disabled,
            it is as though the scissor box includes the entire window.
        </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>first</code></em> is greater than or equal to
            the value of <code class="constant">GL_MAX_VIEWPORTS</code>.
        </p><p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>first</code></em> + <em class="parameter"><code>count</code></em>
            is greater than or equal to the value of <code class="constant">GL_MAX_VIEWPORTS</code>.
        </p><p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if any width or height specified in the array <em class="parameter"><code>v</code></em> is negative.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
            <a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_SCISSOR_BOX</code>
        </p><p>
            <a href="glIsEnabled.xml"><span class="citerefentry"><span class="refentrytitle">glIsEnabled</span></span></a> with argument <code class="constant">GL_SCISSOR_TEST</code>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a href="glEnable.xml"><span class="citerefentry"><span class="refentrytitle">glEnable</span></span></a>,
            <a href="glViewport.xml"><span class="citerefentry"><span class="refentrytitle">glViewport</span></span></a>,
            <a href="glViewportIndexed.xml"><span class="citerefentry"><span class="refentrytitle">glViewportIndexed</span></span></a>,
            <a href="glViewportArray.xml"><span class="citerefentry"><span class="refentrytitle">glViewportArray</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>© 2010 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.
            <a href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
        </p></div></div></body></html>
