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glGetTexParameter.xhtml
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glGetTexParameter.xhtml
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<div class="refentry" title="glGetTexParameter"><a id="glGetTexParameter"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glGetTexParameter — return texture parameter values</p></div><div class="refsynopsisdiv" title="C Specification"><h2>C Specification</h2><div class="funcsynopsis"><table class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">glGetTexParameterfv</b>(</code></td><td>GLenum <var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum <var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLfloat * <var class="pdparam">params</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">glGetTexParameteriv</b>(</code></td><td>GLenum <var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum <var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLint * <var class="pdparam">params</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">glGetTexParameterxv</b>(</code></td><td>GLenum <var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLenum <var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLfixed * <var class="pdparam">params</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Parameters"><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>Specifies the target texture, which must be
<code class="constant">GL_TEXTURE_2D</code>.</p></dd><dt><span class="term">
<em class="parameter"><code>pname</code></em>
</span></dt><dd><p>
Specifies the symbolic name of a texture parameter.
Which can be one of the following:
<code class="constant">GL_TEXTURE_MIN_FILTER</code>,
<code class="constant">GL_TEXTURE_MAG_FILTER</code>,
<code class="constant">GL_TEXTURE_WRAP_S</code>,
<code class="constant">GL_TEXTURE_WRAP_T</code>, or
<code class="constant">GL_GENERATE_MIPMAP</code>.
</p></dd><dt><span class="term">
<em class="parameter"><code>params</code></em>
</span></dt><dd><p>Returns texture parameters.</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="description"></a><h2>Description</h2><p>
<code class="function">glGetTexParameter</code>
returns in <em class="parameter"><code>param</code></em> the value of
the texture parameter specified as <em class="parameter"><code>pname</code></em>.
<em class="parameter"><code>target</code></em> defines the target texture,
which must be <code class="constant">GL_TEXTURE_2D</code>
which specifies two-dimensional texturing.
<em class="parameter"><code>pname</code></em> accepts the same symbols as
<a class="citerefentry" href="glTexParameter"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>,
with the same interpretations:
</p><div class="variablelist"><dl><dt><span class="term">
<code class="constant">GL_TEXTURE_MIN_FILTER</code>
</span></dt><dd><p>
Returns the single-valued texture minifying function, a symbolic
constant, which can be one of the following:
<code class="constant">GL_NEAREST</code>,
<code class="constant">GL_LINEAR</code>,
<code class="constant">GL_NEAREST_MIPMAP_NEAREST</code>,
<code class="constant">GL_LINEAR_MIPMAP_NEAREST</code>,
<code class="constant">GL_NEAREST_MIPMAP_LINEAR</code>, or
<code class="constant">GL_LINEAR_MIPMAP_LINEAR</code>.
The initial value is
<code class="constant">GL_NEAREST_MIPMAP_LINEAR</code>.
</p></dd><dt><span class="term">
<code class="constant">GL_TEXTURE_MAG_FILTER</code>
</span></dt><dd><p>
Returns the single-valued texture magnification function,
a symbolic constant, which can be either
<code class="constant">GL_NEAREST</code> or
<code class="constant">GL_LINEAR</code>.
The initial value is
<code class="constant">GL_LINEAR</code>.
</p></dd><dt><span class="term">
<code class="constant">GL_TEXTURE_WRAP_S</code>
</span></dt><dd><p>
Returns the single-valued wrapping function for texture coordinate
<em class="replaceable"><code>s</code></em>, a symbolic constant, which can be
either:
<code class="constant">GL_CLAMP_TO_EDGE</code>, or
<code class="constant">GL_REPEAT</code>.
The initial value is
<code class="constant">GL_REPEAT</code>.
</p></dd><dt><span class="term">
<code class="constant">GL_TEXTURE_WRAP_T</code>
</span></dt><dd><p>
Returns the single-valued wrapping function for texture coordinate
<em class="replaceable"><code>t</code></em>, a symbolic constant, which can be
either:
<code class="constant">GL_CLAMP_TO_EDGE</code>, or
<code class="constant">GL_REPEAT</code>.
The initial value is
<code class="constant">GL_REPEAT</code>.
</p></dd><dt><span class="term">
<code class="constant">GL_GENERATE_MIPMAP</code>
</span></dt><dd><p>
Returns a single boolean value indicating if automatic mipmap level
updates are enabled. The initial value is
<code class="constant">GL_FALSE</code>.
See <a class="citerefentry" href="glTexParameter"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>.
</p></dd></dl></div></div><div class="refsect1" title="Notes"><a id="notes"></a><h2>Notes</h2><p>
If an error is generated, no change is made to the contents of
<em class="parameter"><code>param</code></em>.
</p></div><div class="refsect1" title="Errors"><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> or
<em class="parameter"><code>pname</code></em>
is not one of the accepted defined values.</p></div><div class="refsect1" title="See Also"><a id="seealso"></a><h2>See Also</h2><p>
<a class="citerefentry" href="glTexParameter"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>
</p></div><div class="refsect1" title="Copyright"><a id="copyright"></a><h2>Copyright</h2><p>
Copyright © 2003-2004
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>