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| <title>clEnqueueWriteImage</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="clEnqueueWriteImage"></a> | |
| <h1> | |
| clEnqueueWriteImage | |
| </h1> | |
| <p> | |
| Enqueues a command to write to an image or image array object from host memory. | |
| </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="scalarDataTypes.html" target="pagedisplay">cl_int</a> | |
| <strong class="fsfunc">clEnqueueWriteImage</strong> | |
| (</code> | |
| <td> | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_command_queue</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">command_queue</var> | |
| , </td> | |
| </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td> | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_mem</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td> | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_bool" target="pagedisplay">cl_bool</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">blocking_write</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td>const | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*origin</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td>const | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*region</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td> | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">input_row_pitch</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td> | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">input_slice_pitch</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td>const | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">void</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">* ptr</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_uint</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_events_in_wait_list</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td>const | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event_wait_list</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td> | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event</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"> command_queue </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Refers to the host command-queue in which the write command will be | |
| queued. <code class="varname">command_queue</code> and <code class="varname">image</code> | |
| must be created with the same OpenCL context. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> image </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Refers to a valid image or image array object. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> blocking_write </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Indicates if the write operation is <code class="varname">blocking</code> or | |
| <code class="varname">non-blocking</code>. | |
| </p> | |
| <p> | |
| If <code class="varname">blocking_write</code> is <code class="constant">CL_TRUE</code> the | |
| OpenCL implementation copies the data referred to by <code class="varname">ptr</code> | |
| and enqueues the write command in the command-queue. The memory pointed | |
| to by <code class="varname">ptr</code> can be reused by the application after the | |
| <code class="function">clEnqueueWriteImage</code> call returns. | |
| </p> | |
| <p> | |
| If <code class="varname">blocking_write</code> is <code class="constant">CL_FALSE</code> | |
| the OpenCL implementation will use <code class="varname">ptr</code> to perform a | |
| nonblocking write. As the write is non-blocking the implementation can return | |
| immediately. The memory pointed to by <code class="varname">ptr</code> cannot be reused | |
| by the application after the call returns. The <code class="varname">event</code> | |
| argument returns an event object which can be used to query the execution | |
| status of the write command. When the write command has completed, the memory | |
| pointed to by <code class="varname">ptr</code> can then be reused by the application. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> origin </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Defines the (<span class="emphasis"><em>x, y, z</em></span>) offset in pixels in the 1D, 2D, or | |
| 3D image, the (<span class="emphasis"><em>x, y</em></span>) offset and the image index in the | |
| image array or the (x) offset and the image index in the 1D image array. If | |
| <code class="varname">image</code> is a 2D image object, <code class="varname">origin</code>[2] | |
| must be 0. If <code class="varname">image</code> is a 1D image or 1D image buffer | |
| object, <code class="varname">origin</code>[1] and <code class="varname">origin</code>[2] | |
| must be 0. If <code class="varname">image</code> is a 1D image array object, | |
| <code class="varname">origin</code>[2] must be 0. If <code class="varname">image</code> | |
| is a 1D image array object, <code class="varname">origin</code>[1] describes the | |
| image index in the 1D image array. If <code class="varname">image</code> is a 2D | |
| image array object, <code class="varname">origin</code>[2] describes the image | |
| index in the 2D image array. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> region </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Defines the (<span class="emphasis"><em>width, height, depth</em></span>) in pixels of the | |
| 1D, 2D or 3D rectangle, the (<span class="emphasis"><em>width, height</em></span>) in pixels | |
| of the 2D rectangle and the number of images of a 2D image array or the | |
| (<span class="emphasis"><em>width</em></span>) in pixels of the 1D rectangle and the number | |
| of images of a 1D image array. If <code class="varname">image</code> is a 2D image | |
| object, <code class="varname">region</code>[2] must be 1. If <code class="varname">image</code> | |
| is a 1D image or 1D image buffer object, <code class="varname">region</code>[1] | |
| and <code class="varname">region</code>[2] must be 1. If image is a 1D image array | |
| object, <code class="varname">region</code>[2] must be 1. The values in <code class="varname">region</code> cannot be 0. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> input_row_pitch </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| The length of each row in bytes. This value must be greater than or | |
| equal to the element size in bytes * <code class="varname">width</code>. If | |
| <code class="varname">input_row_pitch</code> is set to 0, the appropriate row pitch | |
| is calculated based on the size of each element in bytes multiplied by | |
| <code class="varname">width</code>. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> input_slice_pitch </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Size in bytes of the 2D slice of the 3D region of a 3D image or each | |
| image of a 1D or 2D image array being written. This must be 0 if | |
| <code class="varname">image</code> is a 1D or 2D image. Otherwise this value must be greater | |
| than or equal to <code class="varname">row_pitch</code> * <code class="varname">height</code>. If | |
| <code class="varname">input_slice_pitch</code> is set to 0, the appropriate slice | |
| pitch is calculated based on the <code class="varname">row_pitch</code> * | |
| <code class="varname">height</code>. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> ptr </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| The pointer to a buffer in host memory where image data is to be read from. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> | |
| <code class="varname"> | |
| event_wait_list | |
| ,</code> | |
| <code class="varname"> | |
| num_events_in_wait_list | |
| </code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specify events that need to complete before this particular | |
| command can be executed. If <code class="varname">event_wait_list</code> | |
| is NULL, then this particular command does not wait on any | |
| event to complete. If <code class="varname">event_wait_list</code> is | |
| NULL, <code class="varname">num_events_in_wait_list</code> must be 0. If | |
| <code class="varname">event_wait_list</code> is not NULL, the list of events | |
| pointed to by <code class="varname">event_wait_list</code> must be valid | |
| and <code class="varname">num_events_in_wait_list</code> must be greater | |
| than 0. The events specified in <code class="varname">event_wait_list</code> | |
| act as synchronization points. The context associated with events in | |
| <code class="varname">event_wait_list</code> and <code class="varname">command_queue</code> must | |
| be the same. The memory associated with <code class="varname">event_wait_list</code> | |
| can be reused or freed after the function returns. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> event </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Returns an event object that identifies this particular write command | |
| and can be used to query or queue a wait for this particular command | |
| to complete. <code class="varname">event</code> can be NULL in which case it will | |
| not be possible for the application to query the status of this command | |
| or queue a wait for this command to complete. If the | |
| <code class="varname">event_wait_list</code> and the <code class="varname">event</code> | |
| arguments are not NULL, the <code class="varname">event</code> argument should not | |
| refer to an element of the <code class="varname">event_wait_list</code> array. | |
| </p> | |
| </dd> | |
| </dl> | |
| </div> | |
| </div> | |
| <div class="refsect1"> | |
| <a id="notes"></a> | |
| <h2>Notes</h2> | |
| <p> | |
| Calling <code class="function">clEnqueueWriteImage</code> to update the latest bits in a | |
| region of the <code class="varname">image</code> with the <code class="varname">ptr</code> argument | |
| value set to <code class="varname">host_ptr</code> + (<code class="varname">origin</code>[2] | |
| * <code class="varname">image slice pitch</code> + <code class="varname">origin</code>[1] * | |
| <code class="varname">image row pitch</code> + <code class="varname">origin</code>[0] * <code class="varname">bytes | |
| per pixel</code>), where <code class="varname">host_ptr</code> is a pointer to the memory | |
| region specified when the <code class="varname">image</code> being written is created with | |
| <code class="constant">CL_MEM_USE_HOST_PTR</code>, must meet the following requirements in | |
| order to avoid undefined behavior: | |
| </p> | |
| <div class="itemizedlist"> | |
| <ul class="itemizedlist" style="list-style-type: disc; "> | |
| <li class="listitem" style="list-style-type: disc"> | |
| The host memory region being written contains the latest bits when the enqueued | |
| write command begins execution. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"> | |
| The <code class="varname">input_row_pitch</code> and <code class="varname">input_slice_pitch</code> | |
| argument values in <code class="function">clEnqueueWriteImage</code> must be set to the | |
| image row pitch and slice pitch. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"> | |
| The image object is not mapped. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"> | |
| The image object is not used by any command-queue until the write command has | |
| finished execution. | |
| </li> | |
| </ul> | |
| </div> | |
| <p> | |
| If the mipmap extensions are enabled with | |
| <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</span></span></a>, | |
| calls to <a class="citerefentry" href="clEnqueueReadImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadImage</span></span></a>, | |
| <code class="function">clEnqueueWriteImage</code> and | |
| <a class="citerefentry" href="clEnqueueMapImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapImage</span></span></a> | |
| can be used to read | |
| from or write to a specific mip-level of a mip-mapped image. | |
| If image argument is a 1D image, | |
| <code class="varname">origin</code>[1] specifies the mip-level to use. | |
| If image argument is a 1D image array, | |
| <code class="varname">origin</code>[2] specifies the mip-level to use. | |
| If image argument is a 2D image, | |
| <code class="varname">origin</code>[3] specifies the mip-level to use. | |
| If image argument is a 2D image array or a 3D image, | |
| <code class="varname">origin</code>[3] specifies the mip-level to use. | |
| </p> | |
| </div> | |
| <div class="refsect1"> | |
| <a id="errors"></a> | |
| <h2>Errors</h2> | |
| <p> | |
| <code class="function">clEnqueueWriteImage</code> return <span class="errorname">CL_SUCCESS</span> if | |
| the function is executed successfully. Otherwise, it returns one of the following errors: | |
| </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_COMMAND_QUEUE</span> if <code class="varname">command_queue</code> | |
| is not a valid host command-queue. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if the context associated with | |
| <code class="varname">command_queue</code> and <code class="varname">image</code> are | |
| not the same or if the context associated with <code class="varname">command_queue</code> | |
| and events in <code class="varname">event_wait_list</code> are not the same. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_MEM_OBJECT</span> if <code class="varname">image</code> is | |
| not a valid image object. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if the region being written specified by | |
| <code class="varname">origin</code> and <code class="varname">region</code> is out of bounds or if | |
| <code class="varname">ptr</code> is a NULL value. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if values in <code class="varname">origin</code> | |
| and <code class="varname">region</code> do not follow rules described in the argument | |
| description for <code class="varname">origin</code> and <code class="varname">region</code>. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_EVENT_WAIT_LIST</span> | |
| if <code class="varname">event_wait_list</code> is NULL and | |
| <code class="varname">num_events_in_wait_list</code> > 0, | |
| or <code class="varname">event_wait_list</code> is not NULL and | |
| <code class="varname">num_events_in_wait_list</code> is 0, or if event objects in | |
| <code class="varname">event_wait_list</code> are not valid events. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_IMAGE_SIZE</span> if image dimensions (image width, | |
| height, specified or compute row and/or slice pitch) for <code class="varname">image</code> | |
| are not supported by device associated with <code class="varname">queue</code>. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_IMAGE_FORMAT_NOT_SUPPORTED</span> if image format (image channel | |
| order and data type) for <code class="varname">image</code> are not supported by device | |
| associated with <code class="varname">queue</code>. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MEM_OBJECT_ALLOCATION_FAILURE</span> if there is a failure to | |
| allocate memory for data store associated with <code class="varname">image</code>. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_OPERATION</span> if the device associated | |
| with <code class="varname">command_queue</code> does not support images | |
| (i.e. <code class="constant">CL_DEVICE_IMAGE_SUPPORT</code> specified | |
| the table of allowed values for <code class="varname">param_name</code> for | |
| <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a> | |
| is <code class="constant">CL_FALSE</code>). | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_OPERATION</span> if | |
| <code class="function">clEnqueueWriteImage</code> is called on <code class="varname">image</code> | |
| which has been created with <code class="constant">CL_MEM_HOST_READ_ONLY</code> or | |
| <code class="constant">CL_MEM_HOST_NO_ACCESS</code>. | |
| </li> | |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST</span> if the | |
| write operations are blocking and the execution status of any of the events in | |
| <code class="varname">event_wait_list</code> is a negative integer value. | |
| </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="https://www.khronos.org/registry/cl/specs/opencl-2.1.pdf#page=140" target="OpenCL Spec">OpenCL Specification</a> | |
| </p> | |
| </div> | |
| <div class="refsect1"> | |
| <a id="seealso"></a> | |
| <h2>Also see</h2> | |
| <p> | |
| <a class="citerefentry" href="clEnqueueReadImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadImage</span></span></a>, | |
| <a class="citerefentry" href="clEnqueueCopyImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyImage</span></span></a>, | |
| <a class="citerefentry" href="cl_khr_mipmap_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_mipmap_image</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 © 2007-2015 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> | |
| </div> | |
| </body> | |
| </html> |