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| <title>clCreateFromGLRenderbuffer</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="clCreateFromGLRenderbuffer"></a> |
| <h1>clCreateFromGLRenderbuffer</h1> |
| <p> |
| Creates an OpenCL 2D image object from an OpenGL renderbuffer 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"> |
| clCreateFromGLRenderbuffer |
| </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>GLuint <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">renderbuffer</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 at |
| <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a> |
| for a description of <code class="varname">flags</code>. Only |
| <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> values specified in the table at |
| <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a> |
| can be used. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname"> renderbuffer </code> </span> |
| </dt> |
| <dd> |
| <p> |
| The name of a GL renderbuffer |
| object. The renderbuffer storage must be specified before the |
| image object can be created. The <code class="varname">renderbuffer</code> |
| format and dimensions defined by OpenGL will be used to create the |
| 2D image object. Only GL renderbuffers with internal formats that |
| map 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 for |
| <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 2D 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 renderbuffer object is modified through the GL API (i.e. changes |
| to the dimensions or format used to represent pixels of the GL renderbuffer using |
| appropriate GL API calls such as <code class="function">glRenderbufferStorage</code>) 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> |
| <p> |
| The table below (Table 9.4) describes |
| the list of GL texture internal formats and the corresponding CL image formats. If a GL |
| texture object with an internal format from the table below is successfully created by |
| OpenGL, then there is guaranteed to be a mapping to one of the corresponding CL image |
| format(s) in that table. Texture objects created with other OpenGL internal formats may |
| (but are not guaranteed to) have a mapping to a CL image format; if such mappings exist, |
| they are guaranteed to preserve all color components, data types, and at least the number |
| of bits/component actually allocated by OpenGL for that format. |
| </p> |
| <div class="informaltable"> |
| <table border="1"> |
| <colgroup> |
| <col align="center" class="col1" /> |
| <col align="center" class="col2" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="center">GL internal format</th> |
| <th align="center">CL image format (channel order, channel data type)</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA8</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNORM_INT8 or CL_BGRA, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"><code class="constant">GL_RGBA</code>, <code class="constant">GL_UNSIGNED_INT_8_8_8_8_REV</code></td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"><code class="constant">GL_BGRA</code>, <code class="constant">GL_UNSIGNED_INT_8_8_8_8_REV</code></td> |
| <td align="center"> |
| <code class="constant">CL_BGRA, CL_UNORM_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA16</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNORM_INT16</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA8I, GL_RGBA8I_EXT</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_SIGNED_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA16I, GL_RGBA16I_EXT</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_SIGNED_INT16</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA32I, GL_RGBA32I_EXT</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_SIGNED_INT32</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA8UI, GL_RGBA8UI_EXT</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNSIGNED_INT8</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA16UI, GL_RGBA16UI_EXT</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNSIGNED_INT16</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA32UI, GL_RGBA32UI_EXT</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_UNSIGNED_INT32</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA16F, GL_RGBA16F_ARB</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_HALF_FLOAT</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="center"> |
| <code class="constant">GL_RGBA32F, GL_RGBA32F_ARB</code> |
| </td> |
| <td align="center"> |
| <code class="constant">CL_RGBA, CL_FLOAT</code> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </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 CL_SUCCESS 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. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_GL_OBJECT</span> if <code class="varname">renderbuffer</code> is not |
| a GL renderbuffer object or if the width or height of <code class="varname">renderbuffer</code> |
| is zero. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_IMAGE_FORMAT_DESCRIPTOR</span> if the OpenGL renderbuffer |
| 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 <code class="varname">renderbuffer</code> |
| is a multi-sample GL renderbuffer object. |
| </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=53" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <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="cl_image_format.html"><span class="citerefentry"><span class="refentrytitle">cl_image_format</span></span></a>, |
| <a class="citerefentry" href="clRetainMemObject.html"><span class="citerefentry"><span class="refentrytitle">clRetainMemObject</span></span></a>, |
| <a class="citerefentry" href="clReleaseMemObject.html"><span class="citerefentry"><span class="refentrytitle">clReleaseMemObject</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. |
| </div> |
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| </html> |
