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textureOffset.xhtml
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textureOffset.xhtml
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<div class="refentry" id="textureOffset">
<div class="titlepage"></div>
<div class="refnamediv">
<h2>Name</h2>
<p>textureOffset — perform a texture lookup with offset</p>
</div>
<div class="refsynopsisdiv">
<h2>Declaration</h2>
<div class="funcsynopsis">
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">gvec4 <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>gsampler1D <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>float <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>int <var class="pdparam">offset</var>, </td>
</tr>
<tr>
<td> </td>
<td>[float <var class="pdparam">bias</var>]<code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">gvec4 <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>gsampler2D <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec2 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>ivec2 <var class="pdparam">offset</var>, </td>
</tr>
<tr>
<td> </td>
<td>[float <var class="pdparam">bias</var>]<code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">gvec4 <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>gsampler3D <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec3 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>ivec3 <var class="pdparam">offset</var>, </td>
</tr>
<tr>
<td> </td>
<td>[float <var class="pdparam">bias</var>]<code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">gvec4 <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>gsampler2DRect <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec2 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>ivec2 <var class="pdparam">offset</var><code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">float <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>sampler2DRectShadow <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec3 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>ivec2 <var class="pdparam">offset</var><code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">float <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>sampler1DShadow <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec3 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>int <var class="pdparam">offset</var>, </td>
</tr>
<tr>
<td> </td>
<td>[float <var class="pdparam">bias</var>]<code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">float <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>sampler2DShadow <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec4 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>ivec2 <var class="pdparam">offset</var>, </td>
</tr>
<tr>
<td> </td>
<td>[float <var class="pdparam">bias</var>]<code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">gvec4 <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>gsampler1DArray <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec2 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>int <var class="pdparam">offset</var>, </td>
</tr>
<tr>
<td> </td>
<td>[float <var class="pdparam">bias</var>]<code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">gvec4 <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>gsampler2DArray <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec3 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>ivec2 <var class="pdparam">offset</var>, </td>
</tr>
<tr>
<td> </td>
<td>[float <var class="pdparam">bias</var>]<code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">float <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>sampler1DArrayShadow <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec3 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>int <var class="pdparam">offset</var><code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
<table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
<tr>
<td>
<code class="funcdef">float <strong class="fsfunc">textureOffset</strong>(</code>
</td>
<td>sampler2DArrayShadow <var class="pdparam">sampler</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec4 <var class="pdparam">P</var>, </td>
</tr>
<tr>
<td> </td>
<td>vec2 <var class="pdparam">offset</var><code>)</code>;</td>
</tr>
</table>
<div class="funcprototype-spacer"> </div>
</div>
</div>
<div class="refsect1" id="parameters">
<h2>Parameters</h2>
<div class="variablelist">
<dl class="variablelist">
<dt>
<span class="term">
<em class="parameter">
<code>sampler</code>
</em>
</span>
</dt>
<dd>
<p>
Specifies the sampler to which the texture from which texels will be retrieved is bound.
</p>
</dd>
<dt>
<span class="term">
<em class="parameter">
<code>P</code>
</em>
</span>
</dt>
<dd>
<p>
Specifies the texture coordinates at which texture will be sampled.
</p>
</dd>
<dt>
<span class="term">
<em class="parameter">
<code>offset</code>
</em>
</span>
</dt>
<dd>
<p>
Specifies offset, in texels that will be applied to <em class="parameter"><code>P</code></em> before looking up the texel.
</p>
</dd>
</dl>
</div>
</div>
<div class="refsect1" id="description">
<h2>Description</h2>
<p>
<code class="function">textureOffset</code> performs a texture lookup at coordinate <em class="parameter"><code>P</code></em> from the
texture bound to <em class="parameter"><code>sampler</code></em> with an an additional offset, specified in texels in <em class="parameter"><code>offset</code></em>
that will be applied to the (u, v, w) texture coordinates before looking up each texel.
The offset value must be a constant expression. A limited range of offset values are supported;
the minimum and maximum offset values are implementation-dependent and may be determined
by querying <code class="constant">GL_MIN_PROGRAM_TEXEL_OFFSET</code> and <code class="constant">GL_MAX_PROGRAM_TEXEL_OFFSET</code>,
respectively.
</p>
<p>
Note that <em class="parameter"><code>offset</code></em> does not apply to the layer coordinate for texture arrays. Also note
that offsets are not supported for cube maps.
</p>
</div>
{$pipelinestall}{$examples}
<div class="refsect1" id="versions">
<h2>Version Support</h2>
<div class="informaltable">
<table style="border-collapse: collapse; border-top: 2px solid ; border-bottom: 2px solid ; border-left: 2px solid ; border-right: 2px solid ; ">
<colgroup>
<col style="text-align: left; "/>
<col style="text-align: center; " class="firstvers"/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; "/>
<col style="text-align: center; " class="lastvers"/>
</colgroup>
<thead>
<tr>
<th style="text-align: left; border-right: 2px solid ; ">
</th>
<th style="text-align: center; border-bottom: 2px solid ; " colspan="12">
<span class="bold"><strong>OpenGL Shading Language Version</strong></span>
</th>
</tr>
<tr>
<th style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>Function Name</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>1.10</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>1.20</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>1.30</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>1.40</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>1.50</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>3.30</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>4.00</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>4.10</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>4.20</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>4.30</strong></span>
</th>
<th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
<span class="bold"><strong>4.40</strong></span>
</th>
<th style="text-align: center; border-bottom: 2px solid ; ">
<span class="bold"><strong>4.50</strong></span>
</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">textureOffset</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">-</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">-</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">✔</td>
<td style="text-align: center; border-bottom: 2px solid ; ">✔</td>
</tr>
<tr>
<td style="text-align: left; border-right: 2px solid ; ">textureOffset (gsampler2DRect{Shadow})</td>
<td style="text-align: center; border-right: 2px solid ; ">-</td>
<td style="text-align: center; border-right: 2px solid ; ">-</td>
<td style="text-align: center; border-right: 2px solid ; ">-</td>
<td style="text-align: center; border-right: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; ">✔</td>
<td style="text-align: center; border-right: 2px solid ; ">✔</td>
<td style="text-align: center; ">✔</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="refsect1" id="seealso">
<h2>See Also</h2>
<p>
<a class="citerefentry" href="texelFetch"><span class="citerefentry"><span class="refentrytitle">texelFetch</span></span></a>,
<a class="citerefentry" href="texelFetchOffset"><span class="citerefentry"><span class="refentrytitle">texelFetchOffset</span></span></a>,
<a class="citerefentry" href="texture"><span class="citerefentry"><span class="refentrytitle">texture</span></span></a>,
<a class="citerefentry" href="textureGather"><span class="citerefentry"><span class="refentrytitle">textureGather</span></span></a>,
<a class="citerefentry" href="textureGatherOffset"><span class="citerefentry"><span class="refentrytitle">textureGatherOffset</span></span></a>,
<a class="citerefentry" href="textureGatherOffsets"><span class="citerefentry"><span class="refentrytitle">textureGatherOffsets</span></span></a>,
<a class="citerefentry" href="textureGrad"><span class="citerefentry"><span class="refentrytitle">textureGrad</span></span></a>,
<a class="citerefentry" href="textureGradOffset"><span class="citerefentry"><span class="refentrytitle">textureGradOffset</span></span></a>,
<a class="citerefentry" href="textureLod"><span class="citerefentry"><span class="refentrytitle">textureLod</span></span></a>,
<a class="citerefentry" href="textureLodOffset"><span class="citerefentry"><span class="refentrytitle">textureLodOffset</span></span></a>,
<a class="citerefentry" href="textureProj"><span class="citerefentry"><span class="refentrytitle">textureProj</span></span></a>,
<a class="citerefentry" href="textureProjGrad"><span class="citerefentry"><span class="refentrytitle">textureProjGrad</span></span></a>,
<a class="citerefentry" href="textureProjGradOffset"><span class="citerefentry"><span class="refentrytitle">textureProjGradOffset</span></span></a>,
<a class="citerefentry" href="textureProjLod"><span class="citerefentry"><span class="refentrytitle">textureProjLod</span></span></a>,
<a class="citerefentry" href="textureProjLodOffset"><span class="citerefentry"><span class="refentrytitle">textureProjLodOffset</span></span></a>,
<a class="citerefentry" href="textureProjOffset"><span class="citerefentry"><span class="refentrytitle">textureProjOffset</span></span></a>,
<a class="citerefentry" href="textureQueryLod"><span class="citerefentry"><span class="refentrytitle">textureQueryLod</span></span></a>,
<a class="citerefentry" href="textureSize"><span class="citerefentry"><span class="refentrytitle">textureSize</span></span></a>
</p>
</div>
<div class="refsect1" id="Copyright">
<h2>Copyright</h2>
<p>
Copyright © 2011-2014 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.
<a class="link" href="https://opencontent.org/openpub/" target="_top">https://opencontent.org/openpub/</a>.
</p>
</div>
</div>