sdk/1.2/docs/man/xhtml/imageDescriptor.html - external/github.com/KhronosGroup/OpenCL-Registry - Git at Google

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     <title>imageDescriptor</title>
     <meta name="generator" content="DocBook XSL Stylesheets V1.76.1" />
     <meta name="keywords" content="imageDescriptor" />
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   <body>
     <div class="refentry">
       <a id="idm3248"></a>
       <div class="titlepage"></div>
       <div xmlns="" class="refnamediv">
         <a xmlns="http://www.w3.org/1999/xhtml" id="cl_image_format"></a>
         <h1>imageDescriptor</h1>
         <p>
             The image descriptor structure describes the type and dimensions of the image or image array and is defined as:
         </p>
       </div>
       <div class="refsect2">
         <a id="synopsis"></a>
         <h3>
         </h3>
         <div class="informaltable">
           <table border="0">
             <colgroup>
               <col align="left" class="col1" />
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             <tbody>
               <tr>
                 <td align="left">typedef struct _cl_image_desc {
           cl_mem_object_type image_type;
           size_t image_width;
           size_t image_height;
           size_t image_depth;
           size_t image_array_size;
           size_t image_row_pitch;
           size_t image_slice_pitch;
           cl_uint num_mip_levels;
           cl_uint num_samples;
           cl_mem buffer;
 } cl_image_desc;</td>
               </tr>
             </tbody>
           </table>
         </div>
       </div>
       <div class="refsect1">
         <a id="parameters"></a>
         <h2>Members</h2>
         <div class="variablelist">
           <dl>
             <dt>
               <span class="term">image_type</span>
             </dt>
             <dd>
               <p>
                       Describes the image type and must be either
                       <code class="constant">CL_MEM_OBJECT_IMAGE1D</code>,
                       <code class="constant">CL_MEM_OBJECT_IMAGE1D_BUFFER</code>,
                       <code class="constant">CL_MEM_OBJECT_IMAGE1D_ARRAY</code>,
                       <code class="constant">CL_MEM_OBJECT_IMAGE2D</code>,
                       <code class="constant">CL_MEM_OBJECT_IMAGE2D_ARRAY</code>, or
                       <code class="constant">CL_MEM_OBJECT_IMAGE3D</code>.
                     </p>
             </dd>
             <dt>
               <span class="term">image_width</span>
             </dt>
             <dd>
               <p>
                       The width of the image in pixels. For a 2D
                       image and image array, the image width must be ≤
                       <code class="constant">CL_DEVICE_IMAGE2D_MAX_WIDTH</code>. For a 3D image, the image
                       width must be ≤ <code class="constant">CL_DEVICE_IMAGE3D_MAX_WIDTH</code>. For
                       a 1D image buffer, the image width must be ≤
                       <code class="constant">CL_DEVICE_IMAGE_MAX_BUFFER_SIZE</code>. For
                       a 1D image and 1D image array, the image width must be ≤
                       <code class="constant">CL_DEVICE_IMAGE2D_MAX_WIDTH</code>.
                     </p>
             </dd>
             <dt>
               <span class="term">image_height</span>
             </dt>
             <dd>
               <p>
                       The height of the image in pixels. This is only used if the image is a 2D, 3D
                       or 2D image array.  For a 2D image or image array, the image height must be
                       ≤ <code class="constant">CL_DEVICE_IMAGE2D_MAX_HEIGHT</code>.  For a 3D image, the
                       image height must be ≤ <code class="constant">CL_DEVICE_IMAGE3D_MAX_HEIGHT</code>.
                     </p>
             </dd>
             <dt>
               <span class="term">image_depth</span>
             </dt>
             <dd>
               <p>
                       The depth of the image in pixels. This is only used if the
                       image is a 3D image and must be a value ≥ 1 and ≤
                       <code class="constant">CL_DEVICE_IMAGE3D_MAX_DEPTH</code>.
                     </p>
             </dd>
             <dt>
               <span class="term">image_array_size</span>
             </dt>
             <dd>
               <p>
                       The number of images in the image array. This is only
                       used if the image is a 1D or 2D image array. The values for
                       <code class="varname">image_array_size</code>, if specified, must be a value ≥
                       1 and ≤ <code class="constant">CL_DEVICE_IMAGE_MAX_ARRAY_SIZE</code>.
                     </p>
               <p>
                       Note that reading and writing 2D image arrays from a kernel with
                       <code class="varname">image_array_size</code> = 1 may be lower performance than
                       2D images.
                     </p>
             </dd>
             <dt>
               <span class="term">image_row_pitch</span>
             </dt>
             <dd>
               <p>
                       The scan-line pitch in bytes. This must be 0 if <code class="varname">host_ptr</code>
                       is NULL and can be either 0 or ≥ image_width * size of element in bytes if
                       <code class="varname">host_ptr</code> is not NULL. If <code class="varname">host_ptr</code>
                       is not NULL and <code class="varname">image_row_pitch</code> =
                       0, <code class="varname">image_row_pitch</code> is calculated as
                       <code class="varname">image_width</code> * size of element in bytes. If
                       <code class="varname">image_row_pitch</code> is not 0, it must be a multiple of
                       the image element size in bytes.
                     </p>
             </dd>
             <dt>
               <span class="term">image_slice_pitch</span>
             </dt>
             <dd>
               <p>
                       The size in bytes of each 2D slice in the 3D image or the size in
                       bytes of each image in a 1D or 2D image array. This must be 0 if
                       <code class="varname">host_ptr</code> is NULL. If <code class="varname">host_ptr</code>
                       is not NULL, <code class="varname">image_slice_pitch</code> can
                       be either 0 or ≥ <code class="varname">image_row_pitch</code> *
                       <code class="varname">image_height</code> for a 2D image array or 3D image
                       and can be either 0 or ≥ <code class="varname">image_row_pitch</code>
                       for a 1D image array. If <code class="varname">host_ptr</code>
                       is not NULL and <code class="varname">image_slice_pitch</code> =
                       0, <code class="varname">image_slice_pitch</code> is calculated as
                       <code class="varname">image_row_pitch</code> * <code class="varname">image_height</code>
                       for a 2D image array or 3D image and <code class="varname">image_row_pitch</code>
                       for a 1D image array. If <code class="varname">image_slice_pitch</code> is not 0,
                       it must be a multiple of the <code class="varname">image_row_pitch</code>.
                     </p>
             </dd>
             <dt>
               <span class="term">num_mip_level, </span>
               <span class="term">num_samples</span>
             </dt>
             <dd>
               <p>
                       Must be 0.
                     </p>
             </dd>
             <dt>
               <span class="term">buffer</span>
             </dt>
             <dd>
               <p>
                       Refers to a valid buffer memory object if <code class="varname">image_type</code>
                       is <code class="constant">CL_MEM_OBJECT_IMAGE1D_BUFFER</code>. Otherwise it must
                       be NULL. For a 1D image buffer object, the image pixels are taken from
                       the buffer object's data store. When the contents of a buffer object's
                       data store are modified, those changes are reflected in the contents of
                       the 1D image buffer object and vice-versa at corresponding sychronization
                       points. The <code class="varname">image_width</code> * size of element in bytes
                       must be ≤ size of buffer object data store.
                     </p>
             </dd>
           </dl>
         </div>
       </div>
       <div class="refsect1">
         <a id="note"></a>
         <h2>Note</h2>
         <p>
           Concurrent reading from, writing to and copying between both a buffer object and 1D image
           buffer object associated with the buffer object is undefined. Only reading from both
           a buffer object and 1D image buffer object associated with the buffer object is defined.
         </p>
       </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.pdf#page=95" 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_image_format.html"><span class="citerefentry"><span class="refentrytitle">cl_image_format</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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	<title>imageDescriptor</title>
	<meta name="generator" content="DocBook XSL Stylesheets V1.76.1" />
	<meta name="keywords" content="imageDescriptor" />
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	<body>
	<div class="refentry">
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	<div class="titlepage"></div>
	<div xmlns="" class="refnamediv">
	<a xmlns="http://www.w3.org/1999/xhtml" id="cl_image_format"></a>
	<h1>imageDescriptor</h1>
	<p>
	The image descriptor structure describes the type and dimensions of the image or image array and is defined as:
	</p>
	</div>
	<div class="refsect2">
	<a id="synopsis"></a>
	<h3>
	</h3>
	<div class="informaltable">
	<table border="0">
	<colgroup>
	<col align="left" class="col1" />
	</colgroup>
	<tbody>
	<tr>
	<td align="left">typedef struct _cl_image_desc {
	cl_mem_object_type image_type;
	size_t image_width;
	size_t image_height;
	size_t image_depth;
	size_t image_array_size;
	size_t image_row_pitch;
	size_t image_slice_pitch;
	cl_uint num_mip_levels;
	cl_uint num_samples;
	cl_mem buffer;
	} cl_image_desc;</td>
	</tr>
	</tbody>
	</table>
	</div>
	</div>
	<div class="refsect1">
	<a id="parameters"></a>
	<h2>Members</h2>
	<div class="variablelist">
	<dl>
	<dt>
	<span class="term">image_type</span>
	</dt>
	<dd>
	<p>
	Describes the image type and must be either
	<code class="constant">CL_MEM_OBJECT_IMAGE1D</code>,
	<code class="constant">CL_MEM_OBJECT_IMAGE1D_BUFFER</code>,
	<code class="constant">CL_MEM_OBJECT_IMAGE1D_ARRAY</code>,
	<code class="constant">CL_MEM_OBJECT_IMAGE2D</code>,
	<code class="constant">CL_MEM_OBJECT_IMAGE2D_ARRAY</code>, or
	<code class="constant">CL_MEM_OBJECT_IMAGE3D</code>.
	</p>
	</dd>
	<dt>
	<span class="term">image_width</span>
	</dt>
	<dd>
	<p>
	The width of the image in pixels. For a 2D
	image and image array, the image width must be ≤
	<code class="constant">CL_DEVICE_IMAGE2D_MAX_WIDTH</code>. For a 3D image, the image
	width must be ≤ <code class="constant">CL_DEVICE_IMAGE3D_MAX_WIDTH</code>. For
	a 1D image buffer, the image width must be ≤
	<code class="constant">CL_DEVICE_IMAGE_MAX_BUFFER_SIZE</code>. For
	a 1D image and 1D image array, the image width must be ≤
	<code class="constant">CL_DEVICE_IMAGE2D_MAX_WIDTH</code>.
	</p>
	</dd>
	<dt>
	<span class="term">image_height</span>
	</dt>
	<dd>
	<p>
	The height of the image in pixels. This is only used if the image is a 2D, 3D
	or 2D image array. For a 2D image or image array, the image height must be
	≤ <code class="constant">CL_DEVICE_IMAGE2D_MAX_HEIGHT</code>. For a 3D image, the
	image height must be ≤ <code class="constant">CL_DEVICE_IMAGE3D_MAX_HEIGHT</code>.
	</p>
	</dd>
	<dt>
	<span class="term">image_depth</span>
	</dt>
	<dd>
	<p>
	The depth of the image in pixels. This is only used if the
	image is a 3D image and must be a value ≥ 1 and ≤
	<code class="constant">CL_DEVICE_IMAGE3D_MAX_DEPTH</code>.
	</p>
	</dd>
	<dt>
	<span class="term">image_array_size</span>
	</dt>
	<dd>
	<p>
	The number of images in the image array. This is only
	used if the image is a 1D or 2D image array. The values for
	<code class="varname">image_array_size</code>, if specified, must be a value ≥
	1 and ≤ <code class="constant">CL_DEVICE_IMAGE_MAX_ARRAY_SIZE</code>.
	</p>
	<p>
	Note that reading and writing 2D image arrays from a kernel with
	<code class="varname">image_array_size</code> = 1 may be lower performance than
	2D images.
	</p>
	</dd>
	<dt>
	<span class="term">image_row_pitch</span>
	</dt>
	<dd>
	<p>
	The scan-line pitch in bytes. This must be 0 if <code class="varname">host_ptr</code>
	is NULL and can be either 0 or ≥ image_width * size of element in bytes if
	<code class="varname">host_ptr</code> is not NULL. If <code class="varname">host_ptr</code>
	is not NULL and <code class="varname">image_row_pitch</code> =
	0, <code class="varname">image_row_pitch</code> is calculated as
	<code class="varname">image_width</code> * size of element in bytes. If
	<code class="varname">image_row_pitch</code> is not 0, it must be a multiple of
	the image element size in bytes.
	</p>
	</dd>
	<dt>
	<span class="term">image_slice_pitch</span>
	</dt>
	<dd>
	<p>
	The size in bytes of each 2D slice in the 3D image or the size in
	bytes of each image in a 1D or 2D image array. This must be 0 if
	<code class="varname">host_ptr</code> is NULL. If <code class="varname">host_ptr</code>
	is not NULL, <code class="varname">image_slice_pitch</code> can
	be either 0 or ≥ <code class="varname">image_row_pitch</code> *
	<code class="varname">image_height</code> for a 2D image array or 3D image
	and can be either 0 or ≥ <code class="varname">image_row_pitch</code>
	for a 1D image array. If <code class="varname">host_ptr</code>
	is not NULL and <code class="varname">image_slice_pitch</code> =
	0, <code class="varname">image_slice_pitch</code> is calculated as
	<code class="varname">image_row_pitch</code> * <code class="varname">image_height</code>
	for a 2D image array or 3D image and <code class="varname">image_row_pitch</code>
	for a 1D image array. If <code class="varname">image_slice_pitch</code> is not 0,
	it must be a multiple of the <code class="varname">image_row_pitch</code>.
	</p>
	</dd>
	<dt>
	<span class="term">num_mip_level, </span>
	<span class="term">num_samples</span>
	</dt>
	<dd>
	<p>
	Must be 0.
	</p>
	</dd>
	<dt>
	<span class="term">buffer</span>
	</dt>
	<dd>
	<p>
	Refers to a valid buffer memory object if <code class="varname">image_type</code>
	is <code class="constant">CL_MEM_OBJECT_IMAGE1D_BUFFER</code>. Otherwise it must
	be NULL. For a 1D image buffer object, the image pixels are taken from
	the buffer object's data store. When the contents of a buffer object's
	data store are modified, those changes are reflected in the contents of
	the 1D image buffer object and vice-versa at corresponding sychronization
	points. The <code class="varname">image_width</code> * size of element in bytes
	must be ≤ size of buffer object data store.
	</p>
	</dd>
	</dl>
	</div>
	</div>
	<div class="refsect1">
	<a id="note"></a>
	<h2>Note</h2>
	<p>
	Concurrent reading from, writing to and copying between both a buffer object and 1D image
	buffer object associated with the buffer object is undefined. Only reading from both
	a buffer object and 1D image buffer object associated with the buffer object is defined.
	</p>
	</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.pdf#page=95" 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_image_format.html"><span class="citerefentry"><span class="refentrytitle">cl_image_format</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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