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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>glFramebufferParameteri - 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="glFramebufferParameteri"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glFramebufferParameteri — set a named parameter of a framebuffer</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">glFramebufferParameteri</b>(</code></td><td>GLenum  </td><td><var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">param</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>
                    The target of the operation, which must be <code class="constant">GL_READ_FRAMEBUFFER</code>,
                    <code class="constant">GL_DRAW_FRAMEBUFFER</code> or <code class="constant">GL_FRAMEBUFFER</code>.
                </p></dd><dt><span class="term"><em class="parameter"><code>pname</code></em></span></dt><dd><p>
                    A token indicating the parameter to be modified.
                </p></dd><dt><span class="term"><em class="parameter"><code>param</code></em></span></dt><dd><p>
                    The new value for the parameter named <em class="parameter"><code>pname</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">glFramebufferParameteri</code> modifies the current value of the parameter
            named <em class="parameter"><code>pname</code></em> in the framebuffer bound to <em class="parameter"><code>target</code></em>.
            <em class="parameter"><code>target</code></em> must be <code class="constant">GL_READ_FRAMEBFUFFER</code>,
            <code class="constant">GL_DRAW_FRAMEBUFFER</code> or <code class="constant">GL_FRAMEBUFFER</code>. The
            token <code class="constant">GL_FRAMEBUFFER</code> is treated as <code class="constant">GL_DRAW_FRAMEBUFFER</code>.
            A non-default framebuffer must be bound to <em class="parameter"><code>target</code></em>.
        </p><p>
            <em class="parameter"><code>pname</code></em> specifies the parameter to be modified. The following symbols
            are accepted in <em class="parameter"><code>pname</code></em>:
        </p><div class="variablelist"><dl><dt><span class="term"><code class="constant">GL_FRAMEBUFFER_DEFAULT_WIDTH</code></span></dt><dd><p>
                        <em class="parameter"><code>param</code></em> specifies the assumed with for a framebuffer object with no attachments. If a
                        framebuffer has attachments then the width of those attachments is used, otherwise
                        the value of <code class="constant">GL_FRAMEBUFFER_DEFAULT_WIDTH</code> is used for the
                        framebuffer. <em class="parameter"><code>param</code></em> must be greater than or equal to zero and less than
                        or equal to the value of <code class="constant">GL_MAX_FRAMEBUFFER_WIDTH</code>.
                    </p></dd><dt><span class="term"><code class="constant">GL_FRAMEBUFFER_DEFAULT_HEIGHT</code></span></dt><dd><p>
                        <em class="parameter"><code>param</code></em> specifies the assumed height for a framebuffer object with no attachments. If a
                        framebuffer has attachments then the height of those attachments is used, otherwise
                        the value of <code class="constant">GL_FRAMEBUFFER_DEFAULT_HEIGHT</code> is used for the
                        framebuffer. <em class="parameter"><code>param</code></em> must be greater than or equal to zero and less than
                        or equal to the value of <code class="constant">GL_MAX_FRAMEBUFFER_HEIGHT</code>.
                    </p></dd><dt><span class="term"><code class="constant">GL_FRAMEBUFFER_DEFAULT_LAYERS</code></span></dt><dd><p>
                        <em class="parameter"><code>param</code></em> specifies the assumed number of layers for a framebuffer object with no attachments. If a
                        framebuffer has attachments then the layer count of those attachments is used, otherwise
                        the value of <code class="constant">GL_FRAMEBUFFER_DEFAULT_LAYERS</code> is used for the
                        framebuffer. <em class="parameter"><code>param</code></em> must be greater than or equal to zero and less than
                        or equal to the value of <code class="constant">GL_MAX_FRAMEBUFFER_LAYERS</code>.
                    </p></dd><dt><span class="term"><code class="constant">GL_FRAMEBUFFER_DEFAULT_SAMPLES</code></span></dt><dd><p>
                        <em class="parameter"><code>param</code></em> specifies the assumed number of samples in a framebuffer object with no attachments. If a
                        framebuffer has attachments then the sample count of those attachments is used, otherwise
                        the value of <code class="constant">GL_FRAMEBUFFER_DEFAULT_SAMPLES</code> is used for the
                        framebuffer. <em class="parameter"><code>param</code></em> must be greater than or equal to zero and less than
                        or equal to the value of <code class="constant">GL_MAX_FRAMEBUFFER_SAMPLE</code>.
                    </p></dd><dt><span class="term"><code class="constant">GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS</code></span></dt><dd><p>
                        <em class="parameter"><code>param</code></em> specifies whether the framebuffer should assume identical sample locations and
                        the same number of samples for all texels in the virtual image. If <em class="parameter"><code>param</code></em> is zero,
                        then the implementation may vary the position or the count of samples within the virtual image from
                        pixel to pixel, otherwise it will use the same sample position and count for all pixels in the virtual image.
                    </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
            <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is not one of the accepted
            framebuffer targets.
        </p><p>
            <code class="constant">GL_INVAILD_VALUE</code> is generated if <em class="parameter"><code>pname</code></em> is <code class="constant">GL_FRAMEBUFFER_DEFAULT_WIDTH</code>
            and <em class="parameter"><code>param</code></em> is less than zero or greater than the value of <code class="constant">GL_MAX_FRAMEBUFFER_WIDTH</code>.
        </p><p>
            <code class="constant">GL_INVAILD_VALUE</code> is generated if <em class="parameter"><code>pname</code></em> is <code class="constant">GL_FRAMEBUFFER_DEFAULT_HEIGHT</code>
            and <em class="parameter"><code>param</code></em> is less than zero or greater than the value of <code class="constant">GL_MAX_FRAMEBUFFER_HEIGHT</code>.
        </p><p>
            <code class="constant">GL_INVAILD_VALUE</code> is generated if <em class="parameter"><code>pname</code></em> is <code class="constant">GL_FRAMEBUFFER_DEFAULT_LAYERS</code>
            and <em class="parameter"><code>param</code></em> is less than zero or greater than the value of <code class="constant">GL_MAX_FRAMEBUFFER_LAYERS</code>.
        </p><p>
            <code class="constant">GL_INVAILD_VALUE</code> is generated if <em class="parameter"><code>pname</code></em> is <code class="constant">GL_FRAMEBUFFER_DEFAULT_SAMPLES</code>
            and <em class="parameter"><code>param</code></em> is less than zero or greater than the value of <code class="constant">GL_MAX_FRAMEBUFFER_SAMPLES</code>.
        </p><p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if the default framebuffer is bound to <em class="parameter"><code>target</code></em>.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
            <a href="glGetFramebufferParameteriv.xml"><span class="citerefentry"><span class="refentrytitle">glGetFramebufferParameteriv</span></span></a>.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a href="glVertexAttribBinding.xml"><span class="citerefentry"><span class="refentrytitle">glVertexAttribBinding</span></span></a>,
            <a href="glVertexAttribFormat.xml"><span class="citerefentry"><span class="refentrytitle">glVertexAttribFormat</span></span></a>,
            <a href="glVertexAttribPointer.xml"><span class="citerefentry"><span class="refentrytitle">glVertexAttribPointer</span></span></a>,
            <a href="glVertexBindingDivisor.xml"><span class="citerefentry"><span class="refentrytitle">glVertexBindingDivisor</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>© 2012 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>
