| <?xml version="1.0" encoding="UTF-8"?> |
| <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN" |
| "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">[ |
| <!ENTITY imageFunctionsInc SYSTEM "imageFunctionsInc.xml"> |
| <!ENTITY imageMappingInc SYSTEM "imageMappingInc.xml"> |
| <!ENTITY imageMipmapFunctions2DInc SYSTEM "imageMipmapFunctions2DInc.xml"> |
| ]> |
| |
| <refentry> |
| <refentryinfo> |
| <keywordset> |
| <keyword>read_imagei (2D)</keyword> |
| </keywordset> |
| </refentryinfo> |
| |
| <refmeta> |
| <refentrytitle>read_imagei (2D)</refentrytitle> |
| |
| <refmiscinfo> |
| <copyright> |
| <year>2007-2013</year> |
| <holder>The Khronos Group Inc. |
| Permission is hereby granted, free of charge, to any person obtaining a |
| copy of this software and/or associated documentation files (the |
| "Materials"), to deal in the Materials without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Materials, and to |
| permit persons to whom the Materials are furnished to do so, subject to |
| the condition that this copyright notice and permission notice shall be included |
| in all copies or substantial portions of the Materials.</holder> |
| </copyright> |
| </refmiscinfo> |
| <manvolnum>3</manvolnum> |
| </refmeta> |
| |
| <!-- ================================ SYNOPSIS --> |
| |
| <refnamediv id="read_image2d"> |
| <refname>read_image{i|ui} (2D)</refname> |
| |
| <refpurpose> |
| Do an element lookup in the 2D image object, returning unnormalized signed integer and unsigned integer values. |
| </refpurpose> |
| </refnamediv> |
| |
| <refsynopsisdiv xmlns:xlink="http://www.w3.org/1999/xlink"><title></title> |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <!-- SAMPLER-LESS FORMS --> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| |
| <bridgehead>Functions added with mipmap support enabled by extension |
| <code>cl_khr_mipmap_image</code>:</bridgehead> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="scalarDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="scalarDataTypes.html">float</link> |
| <parameter>lod</parameter> |
| </paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="scalarDataTypes.html">float</link> |
| <parameter>lod</parameter> |
| </paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>gradient_x</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>gradient_y</parameter> |
| </paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>gradient_x</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>gradient_y</parameter> |
| </paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="scalarDataTypes.html">float</link> |
| <parameter>lod</parameter> |
| </paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="scalarDataTypes.html">float</link> |
| <parameter>lod</parameter> |
| </paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>gradient_x</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>gradient_y</parameter> |
| </paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_t</link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="sampler_t.html">sampler_t</link> |
| <parameter>sampler</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>gradient_x</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">float2</link> |
| <parameter>gradient_y</parameter> |
| </paramdef> |
| </funcprototype> |
| |
| </funcsynopsis> |
| |
| |
| <bridgehead>Functions added with MSAA support enabled by extension |
| <code>cl_khr_gl_msaa_sharing</code>:</bridgehead> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_msaa_t </link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="scalarDataTypes.html">int</link> |
| <parameter>sample</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_msaa_t </link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int2</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="scalarDataTypes.html">int</link> |
| <parameter>sample</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <function> |
| read_imagei |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_msaa_t </link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="scalarDataTypes.html">int</link> |
| <parameter>sample</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| <link xlink:href="vectorDataTypes.html">uint4</link> |
| <function> |
| read_imageui |
| </function> |
| </funcdef> |
| <paramdef> |
| <link xlink:href="otherDataTypes.html">image2d_array_msaa_t </link> |
| <parameter>image</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="vectorDataTypes.html">int4</link> |
| <parameter>coord</parameter> |
| </paramdef> |
| <paramdef> |
| <link xlink:href="scalarDataTypes.html">int</link> |
| <parameter>sample</parameter> |
| </paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| </refsynopsisdiv> |
| |
| <!-- ================================ DESCRIPTION --> |
| |
| <refsect1 id="description"><title>Description</title> |
| <para> |
| For the forms that take an <type>image2d_t</type> object, use the coordinate |
| <emphasis>(coord.x, coord.y)</emphasis> to do an element lookup in the 2D image object |
| specified by <varname>image</varname>. |
| </para> |
| |
| <para> |
| For the forms that take an <type>image2d_array_t</type> object, use |
| the gradients to compute the lod and |
| coordinate <emphasis>coord.xy</emphasis> to do an element lookup in |
| the mip-level specified by the computed lod in |
| the 2D image object specified by <varname>image</varname>. |
| </para> |
| |
| <para> |
| For the forms that take an <type>image2d_t</type> object and gradients, use |
| <emphasis>coord.xy</emphasis> to do an element lookup in the 2D image identified by |
| <emphasis>coord.z</emphasis> in the 2D image array specified by <varname>image</varname>. |
| </para> |
| |
| <para> |
| For forms that take <type>image2d_msaa_t</type>, |
| use the coordinate (<varname>coord.x, coord.y</varname>) and <varname>sample</varname> to |
| do an element lookup in the 2D image object |
| specified by <varname>image</varname>. |
| </para> |
| |
| <para> |
| For forms that take <type>image2d_array_msaa_t</type>, |
| use <varname>coord.xy</varname> and <varname>sample</varname> to do an element lookup in |
| the 2D image identified by <varname>coord.z</varname> in the 2D image |
| array specified by <varname>image</varname>. |
| </para> |
| |
| |
| <para> |
| The samplerless read image functions behave exactly as the corresponding read |
| image functions that take integer coordinates and a sampler with filter mode |
| set to <constant>CLK_FILTER_NEAREST</constant>, normalized coordinates set |
| to <constant>CLK_NORMALIZED_COORDS_FALSE</constant> and addressing mode to |
| <constant>CLK_ADDRESS_NONE</constant>. |
| </para> |
| |
| <para> |
| <function>read_imagei</function> and <function>read_imageui</function> return |
| unnormalized signed integer and unsigned integer values respectively. Each channel |
| will be stored in a 32-bit integer. |
| </para> |
| |
| <para> |
| <function>read_imagei</function> can only be used with image objects created with |
| <varname>image_channel_data_type</varname> set to one of the following values: |
| <constant>CL_SIGNED_INT8</constant>, <constant>CL_SIGNED_INT16</constant>, or |
| <constant>CL_SIGNED_INT32</constant>. If the <varname>image_channel_data_type</varname> |
| is not one of the above values, the values returned by <function>read_imagei</function> |
| are undefined. |
| </para> |
| |
| <para> |
| <function>read_imageui</function> can only be used with image objects created with |
| <varname>image_channel_data_type</varname> set to one of the following values: |
| <constant>CL_UNSIGNED_INT8</constant>, <constant>CL_UNSIGNED_INT16</constant>, and |
| <constant>CL_UNSIGNED_INT32</constant>. If the <varname>image_channel_data_type</varname> |
| is not one of the above values, the values returned by <function>read_imageui</function> |
| are undefined. |
| </para> |
| |
| <para> |
| For the forms that take a sampler, the <function>read_imagei</function> and |
| <function>read_imageui</function> calls |
| support a nearest filter only. The <varname>filter_mode</varname> specified in |
| <varname>sampler</varname> must be set to <constant>CLK_FILTER_NEAREST</constant>; |
| otherwise the values returned are undefined. |
| </para> |
| |
| <para> |
| Furthermore, for the forms that take a sampler, the <function>read_imagei</function> |
| and <function>read_imageui</function> |
| calls that take integer coordinates must use a sampler with normalized coordinates |
| set to <constant>CLK_NORMALIZED_COORDS_FALSE</constant> and addressing mode set to |
| <constant>CLK_ADDRESS_CLAMP_TO_EDGE</constant>, <constant>CLK_ADDRESS_CLAMP</constant> |
| or <constant>CLK_ADDRESS_NONE</constant>; otherwise the values returned are undefined. |
| </para> |
| |
| &imageMipmapFunctions2DInc; |
| |
| </refsect1> |
| |
| <!-- ================================ NOTES --> |
| |
| <refsect1 id="notes"><title>Notes</title> |
| |
| &imageFunctionsInc; |
| |
| &imageMappingInc; |
| |
| <bridgehead>Mipmap read image functions:</bridgehead> |
| |
| <para> |
| <constant>CL_SAMPLER_NORMALIZED_COORDS</constant> must be <constant>CL_TRUE</constant> for built-in functions |
| described in the table above that read from a mip-mapped image; otherwise the behavior is |
| undefined. The value specified in the <varname>lod</varname> argument is clamped to the minimum of (actual |
| number of mip-levels – 1) in the image or value specified for <constant>CL_SAMPLER_LOD_MAX_KHR</constant>. |
| </para> |
| |
| </refsect1> |
| |
| <!-- ================================ SPECIFICATION --> |
| <!-- Set the "uri" attribute in the <olink /> element to the "named destination" for the PDF page |
| --> |
| <refsect1 id="specification"><title>Specification</title> |
| <para> |
| <imageobject> |
| <imagedata fileref="pdficon_small1.gif" format="gif" /> |
| </imageobject> |
| |
| <olink uri="imageFunctions">OpenCL Specification</olink> |
| </para> |
| </refsect1> |
| |
| <!-- ================================ ALSO SEE --> |
| |
| <refsect1 id="seealso"><title>Also see</title> |
| <para> |
| <citerefentry href="imageFunctions"><refentrytitle>Image Functions</refentrytitle></citerefentry>, |
| <citerefentry><refentrytitle>cl_khr_mipmap_image</refentrytitle></citerefentry>, |
| <citerefentry><refentrytitle>sampler_t</refentrytitle></citerefentry>, |
| <citerefentry><refentrytitle>cl_khr_gl_msaa_sharing</refentrytitle></citerefentry> |
| </para> |
| </refsect1> |
| |
| <!-- ============================== COPYRIGHT --> |
| <!-- Content included from copyright.inc.xsl --> |
| |
| <refsect3 id="Copyright"><title></title> |
| <imageobject> |
| <imagedata fileref="KhronosLogo.jpg" format="jpg" /> |
| </imageobject> |
| <para /> |
| </refsect3> |
| |
| <!-- 18-Dec-2013, rev. 19 --> |
| </refentry> |
| |
