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| <title>clCreateFromGLTexture3D</title> |
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| <body> |
| <div class="refentry"> |
| <a id="idm1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clCreateFromGLTexture3D"></a> |
| <h1>clCreateFromGLTexture3D</h1> |
| <p> |
| Creates an OpenCL 3D image object from an OpenGL 3D texture object. |
| </p> |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2></h2> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| cl_mem |
| <strong class="fsfunc"> |
| clCreateFromGLTexture3D |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="_top">cl_context</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">context</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_mem_flags" target="_top">cl_mem_flags</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">flags</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>GLenum <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">texture_target</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>GLint <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">miplevel</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>GLuint <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">texture</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">cl_int</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">* errcode_ret</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="parameters"></a> |
| <h2>Parameters</h2> |
| <div class="variablelist"> |
| <dl class="variablelist"> |
| <dt> |
| <span class="term"> |
| <code class="varname"> |
| context |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A valid OpenCL context created from an OpenGL 3D context. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname"> |
| flags |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A bit-field that is used to specify usage information. Refer to |
| the table at |
| <code class="function"><a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a></code> |
| for a description of <code class="varname">flags</code>. Only the valuesCL_MEM_READ_ONLY, CL_MEM_WRITE_ONLY and CL_MEM_READ_WRITE can be used. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname"> |
| texture_target |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| <code class="varname">texture_target</code> |
| is used only to define the image type of <code class="varname">texture</code>. Must be GL_TEXTURE_3D. No reference to a bound GL texture object |
| is made or implied by this parameter. |
| |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname"> |
| miplevel |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| The mipmap level to be used. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname"> |
| texture |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| The name of a GL 3D texture object. The texture object must |
| be a complete texture as |
| per OpenGL rules on texture completeness. |
| The <code class="varname">texture</code> |
| format and dimensions defined by |
| OpenGL for the specified <code class="varname">miplevel</code> of the texture will |
| be used to create the 3D image object. |
| Only GL texture objects with an internal format that maps to appropriate image channel order |
| and data type specified in |
| the table of supported Image Channel Order Values and |
| the table of supported Image Channel Data Types at |
| <span class="type"><a class="citerefentry" href="cl_image_format.html"><span class="citerefentry"><span class="refentrytitle">cl_image_format</span></span></a></span> |
| can be used to create the 3D image object. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname"> |
| errcode_ret |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Returns an appropriate error code as described below. |
| If <code class="varname">errcode_ret</code> is NULL, no error code is returned. |
| </p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| If the state of a GL texture object is modified through the GL API (e.g. the OpenGL functions |
| <code class="function">glTexImage2D</code> or <code class="function">glTexImage3D</code>, |
| or the values of the texture parameters GL_TEXTURE_BASE_LEVEL or |
| GL_TEXTURE_MAX_LEVEL are modified) while there exists a corresponding CL image object, |
| subsequent use of the CL image object will result in undefined behavior. |
| </p> |
| <p> |
| The |
| <a class="citerefentry" href="clRetainMemObject.html"><span class="citerefentry"><span class="refentrytitle"><code class="function">clRetainMemObject</code></span></span></a> |
| and |
| <a class="citerefentry" href="clReleaseMemObject.html"><span class="citerefentry"><span class="refentrytitle"><code class="function">clReleaseMemObject</code></span></span></a> |
| functions can be used to retain and release |
| the image objects. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| OpenCL 1.0 supports read-only 3D image memory objects. Writes to 3D image objects that are GL 3D textures |
| are supported if the OpenCL implementation supports the <a class="citerefentry" href="cl_khr_3d_image_writes.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_3d_image_writes</span></span></a> extension. 3D images |
| are optional in the embedded profile. If 3D images are not supported by the OpenCL embedded profile, the |
| <code class="varname">errcode_ret</code> argument to <code class="function">clCreateFromGLTexture3D</code> will return CL_INVALID_OPERATION. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="errors"></a> |
| <h2>Errors</h2> |
| <p> |
| Returns a valid non-zero OpenCL image object and <code class="varname">errcode_ret</code> is |
| set to <span class="errorname">CL_SUCCESS</span> if the image object is |
| created successfully. Otherwise, it returns a NULL |
| value with one of the following error values returned in <code class="varname">errcode_ret</code>: |
| </p> |
| <div class="itemizedlist"> |
| <ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if <code class="varname">context</code> |
| is not a valid context or was not created from a GL context. |
| . |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if values specified in |
| <code class="varname">flags</code> are not valid or if value specified in |
| <code class="varname">texture_target</code> is not one of the values specified |
| in the description of <code class="varname">texture_target</code>. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_MIPLEVEL</span> if <code class="varname">miplevel</code> is less |
| than the value of <code class="varname">level<sub>base</sub></code> (for OpenGL |
| implementations) or zero (for OpenGL ES implementations); or greater than the value of |
| <code class="varname">q</code> (for both OpenGL and OpenGL ES). |
| <code class="varname">level<sub>base</sub></code> and <code class="varname">q</code> |
| are defined for the texture in |
| section 3.8.10 (Texture Completeness) |
| of the OpenGL 2.1 specification and |
| section 3.7.10 of the OpenGL ES 2.0. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_MIPLEVEL</span> if <code class="varname">miplevel</code> |
| is greater than zero |
| and the OpenGL implementation does not support creating from non-zero mipmap levels. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_GL_OBJECT</span> if <code class="varname">texture</code> |
| is not a |
| GL texture object whose type matches |
| <code class="varname">texture_target</code>, if the specified <code class="varname">miplevel</code> of |
| <code class="varname">texture</code> is not defined, |
| or if the width or height |
| of the specified <code class="varname">miplevel</code> is zero. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_IMAGE_FORMAT_DESCRIPTOR</span> if the |
| OpenGL texture internal format |
| does not map to a supported OpenCL image format. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure |
| to allocate resources required by the |
| OpenCL implementation on the host. |
| </li> |
| </ul> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="specification"></a> |
| <h2>Specification</h2> |
| <p> |
| <img src="pdficon_small1.gif" /> |
| |
| <a href="http://www.khronos.org/registry/cl/specs/opencl-1.0.pdf#page=282" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>, |
| <a class="citerefentry" href="clCreateFromGLTexture2D.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromGLTexture2D</span></span></a> |
| </p> |
| </div> |
| <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2009 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. |
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