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| <title>clCreateFromGLTexture</title> |
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| </head> |
| <body> |
| <div class="refentry"> |
| <a id="id-1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clCreateFromGLTexture"></a> |
| <h1>clCreateFromGLTexture</h1> |
| <p> |
| Creates an OpenCL image object, image array object, or image buffer object from an OpenGL texture object, |
| texture array object, texture buffer object, or a single face of an OpenGL cubemap 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"><a class="link" href="abstractDataTypes.html" target="pagedisplay">cl_mem</a> |
| <strong class="fsfunc"> |
| clCreateFromGLTexture |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">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="pagedisplay">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="pagedisplay">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 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 for |
| <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 values |
| <code class="constant">CL_MEM_READ_ONLY</code>, <code class="constant">CL_MEM_WRITE_ONLY</code> |
| and <code class="constant">CL_MEM_READ_WRITE</code> 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> |
| This value must be one of <code class="constant">GL_TEXTURE_1D</code>, |
| <code class="constant">GL_TEXTURE_1D_ARRAY</code>, |
| <code class="constant">GL_TEXTURE_BUFFER</code>, <code class="constant">GL_TEXTURE_2D</code>, |
| <code class="constant">GL_TEXTURE_2D_ARRAY</code>, <code class="constant">GL_TEXTURE_3D</code>, |
| <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_X</code>, |
| <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_Y</code>, |
| <code class="constant">GL_TEXTURE_CUBE_MAP_POSITIVE_Z</code>, |
| <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_X</code>, |
| <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_Y</code>, |
| <code class="constant">GL_TEXTURE_CUBE_MAP_NEGATIVE_Z</code>, or |
| <code class="constant">GL_TEXTURE_RECTANGLE</code>. This requires OpenGL 3.1. |
| Alternatively, <code class="constant">GL_TEXTURE_RECTANGLE_ARB</code> may be |
| specified if the OpenGL extension GL_ARB_texture_rectangle is supported. |
| <code class="varname">texture_target</code> is used only to define the image type |
| of <code class="varname">texture</code>. 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. If |
| <code class="varname">texture_target</code> is <code class="constant">GL_TEXTURE_BUFFER</code>, |
| miplevel must be 0. Implementations may return |
| <code class="constant">CL_INVALID_OPERATION</code> for miplevel values > 0 |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname"> texture </code> </span> |
| </dt> |
| <dd> |
| <p> |
| The name of a GL 1D, 2D, 3D, 1D array, |
| 2D array, cubemap, rectangle or buffer 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 OpenCL image memory object. Only GL texture objects with an internal |
| format that maps to appropriate image channel order and data type specified |
| in tables 5.5 and 5.6 may be used to create the OpenCL image memory 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="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| If the state of a GL texture object is modified through the GL API |
| (e.g. <code class="function">glTexImage2D</code>, <code class="function">glTexImage3D</code> or |
| the values of the texture parameters <code class="constant">GL_TEXTURE_BASE_LEVEL</code> |
| or <code class="constant">GL_TEXTURE_MAX_LEVEL</code> 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">clRetainMemObject</span></span></a> |
| and <a class="citerefentry" href="clReleaseMemObject.html"><span class="citerefentry"><span class="refentrytitle">clReleaseMemObject</span></span></a> |
| functions can be used to retain and release the image objects. |
| </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_MIP_LEVEL</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_MIP_LEVEL</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_INVALID_OPERATION</span> if texture is a GL texture object |
| created with a border width value greater than zero. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_RESOURCES</span> if there is a failure to allocate |
| resources required by the OpenCL implementation on the device. |
| </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-1.2-extensions.pdf#page=50" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"><a id="seealso"></a><h2>Also see</h2> |
| obsolete page replaced by clCreateFromGLTexture |
| <p> |
| <a class="citerefentry" href="cl_khr_gl_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_gl_sharing</span></span></a>, |
| <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>, |
| <a class="citerefentry" href="clCreateFromGLTexture.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromGLTexture</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 © 2007-2011 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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