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| <title>clGetSupportedImageFormats</title> |
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| <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="clGetSupportedImageFormats"></a> |
| <h1> |
| clGetSupportedImageFormats |
| </h1> |
| <p> |
| Get the list of image formats supported by an OpenCL implementation. |
| </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">clGetSupportedImageFormats</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><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_mem_object_type" target="pagedisplay">cl_mem_object_type</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">image_type</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_entries</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="cl_image_format.html" target="pagedisplay">cl_image_format</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*image_formats</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_image_formats</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 on which the image object(s) will be created. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname"> flags </code> </span> |
| </dt> |
| <dd> |
| <p> |
| A bit-field that is used to specify allocation and usage information about |
| the image memory object being queried and is described in the table below. |
| To get a list of supported image |
| formats that can be read from or written to by a |
| kernel, <code class="varname">flags</code> must be set to |
| <code class="constant">CL_MEM_READ_WRITE</code> |
| (get a list of images that can be read from and written |
| to by different kernel instances when correctly ordered |
| by event dependencies), |
| <code class="constant">CL_MEM_READ_ONLY</code> (list of images |
| that can be read from by a kernel) or |
| <code class="constant">CL_MEM_WRITE_ONLY</code> (list of images |
| that can be written to by a kernel). To get a list of |
| supported image formats that can be both read from and |
| written to by a kernel, <code class="varname">flags</code> must be set |
| to <code class="constant">CL_MEM_KERNEL_READ_AND_WRITE</code>. |
| Please see section 5.3.2.2 for clarification. |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left">cl_mem_flags</th> |
| <th align="left">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_READ_WRITE</code> |
| </td> |
| <td align="left"> |
| This flag specifies that the memory object will be read and written by a kernel. This |
| is the default. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_WRITE_ONLY</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag specifies that the memory object will be written but not read by |
| a kernel. |
| </p> |
| |
| <p> |
| Reading from a buffer or image object created with |
| <code class="constant">CL_MEM_WRITE_ONLY</code> inside a kernel is undefined. |
| </p> |
| |
| <p> |
| <code class="constant">CL_MEM_READ_WRITE</code> and <code class="constant">CL_MEM_WRITE_ONLY</code> |
| are mutually exclusive. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_READ_ONLY</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag specifies that the memory object is a read-only memory object when |
| used inside a kernel. |
| </p> |
| |
| <p> |
| Writing to a buffer or image object created with |
| <code class="constant">CL_MEM_READ_ONLY</code> inside a kernel is undefined. |
| </p> |
| |
| <p> |
| <code class="constant">CL_MEM_READ_WRITE</code> or <code class="constant">CL_MEM_WRITE_ONLY</code> |
| and <code class="constant">CL_MEM_READ_ONLY</code> are mutually exclusive. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_USE_HOST_PTR</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag is valid only if <code class="varname">host_ptr</code> is not NULL. If |
| specified, it indicates that the application wants the OpenCL implementation |
| to use memory referenced by <code class="varname">host_ptr</code> as the storage bits |
| for the memory object. |
| </p> |
| |
| <p> |
| OpenCL implementations are allowed to cache the buffer contents pointed to by |
| <code class="varname">host_ptr</code> in device memory. This cached copy can be used when |
| kernels are executed on a device. |
| </p> |
| |
| <p> |
| The result of OpenCL commands that operate on multiple buffer objects created with |
| the same <code class="varname">host_ptr</code> or overlapping host regions is considered |
| to be undefined. |
| </p> |
| |
| |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_ALLOC_HOST_PTR</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag specifies that the application wants the OpenCL implementation to |
| allocate memory from host accessible memory. |
| </p> |
| |
| <p> |
| <code class="constant">CL_MEM_ALLOC_HOST_PTR</code> and |
| <code class="constant">CL_MEM_USE_HOST_PTR</code> are mutually exclusive. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_COPY_HOST_PTR</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag is valid only if <code class="varname">host_ptr</code> is not NULL. If specified, |
| it indicates that the application wants the OpenCL implementation to allocate |
| memory for the memory object and copy the data from memory referenced by |
| <code class="varname">host_ptr</code>. |
| </p> |
| |
| <p> |
| <code class="constant">CL_MEM_COPY_HOST_PTR</code> and |
| <code class="constant">CL_MEM_USE_HOST_PTR</code> are mutually exclusive. |
| </p> |
| |
| <p> |
| <code class="constant">CL_MEM_COPY_HOST_PTR</code> can be used with |
| <code class="constant">CL_MEM_ALLOC_HOST_PTR</code> to initialize the contents of the |
| <span class="type">cl_mem</span> object allocated using host-accessible (e.g. PCIe) memory. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_HOST_WRITE_ONLY</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag specifies that the host will only write to the memory object (using |
| OpenCL APIs that enqueue a write or a map for write). This can be used to optimize |
| write access from the host (e.g. enable write-combined allocations for memory |
| objects for devices that communicate with the host over a system bus such as PCIe). |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_HOST_READ_ONLY</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag specifies that the host will only read the memory object (using OpenCL |
| APIs that enqueue a read or a map for read). |
| </p> |
| |
| <p> |
| <code class="constant">CL_MEM_HOST_WRITE_ONLY</code> and |
| <code class="constant">CL_MEM_HOST_READ_ONLY</code> are mutually exclusive. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_HOST_NO_ACCESS</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag specifies that the host will not read or write the memory object. |
| </p> |
| |
| <p> |
| <code class="constant">CL_MEM_HOST_WRITE_ONLY</code> or |
| <code class="constant">CL_MEM_HOST_READ_ONLY</code> and |
| <code class="constant">CL_MEM_HOST_NO_ACCESS</code> are mutually exclusive. |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname"> image_type </code> </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_IMAGE2D</code>, |
| <code class="constant">CL_MEM_OBJECT_IMAGE3D</code>, |
| <code class="constant">CL_MEM_OBJECT_IMAGE1D_ARRAY</code> or |
| <code class="constant">CL_MEM_OBJECT_IMAGE2D_ARRAY</code>. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname"> num_entries </code> </span> |
| </dt> |
| <dd> |
| <p> |
| Specifies the number of entries that can be returned in the memory location |
| given by <code class="varname">image_formats</code>. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname"> image_formats </code> </span> |
| </dt> |
| <dd> |
| <p> |
| A pointer to a memory location where the list of |
| supported image formats are returned. Each entry describes a |
| <a class="citerefentry" href="cl_image_format.html"><span class="citerefentry"><span class="refentrytitle">cl_image_format</span></span></a> |
| structure supported by the OpenCL implementation. If |
| <code class="varname">image_formats</code> is NULL, it is ignored. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> <code class="varname"> num_image_formats </code> </span> |
| </dt> |
| <dd> |
| <p> |
| The actual number of supported image formats for a |
| specific <code class="varname">context</code> and values specified by |
| <code class="varname">flags</code>. If <code class="varname">num_image_formats</code> is NULL, |
| it is ignored. |
| </p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| <code class="function">clGetSupportedImageFormats</code> can be used to get the list of image |
| formats supported by an OpenCL implementation when the following information about |
| an image memory object is specified: |
| </p> |
| <div class="itemizedlist"> |
| <ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem" style="list-style-type: disc"> |
| Context |
| </li> |
| <li class="listitem" style="list-style-type: disc"> |
| Image type - 1D, 2D, or 3D image, 1D image buffer, 1D or 2D image array. |
| </li> |
| <li class="listitem" style="list-style-type: disc"> |
| Image object allocation information |
| </li> |
| </ul> |
| </div> |
| <p> |
| <code class="function">clGetSupportedImageFormats</code> returns a union of image formats |
| supported by all devices in the context. |
| </p> |
| <p> |
| If <code class="constant">CL_DEVICE_IMAGE_SUPPORT</code> specified in table 4.3 |
| (see <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a>) |
| is <code class="constant">CL_TRUE</code>, the values assigned to |
| <code class="constant">CL_DEVICE_MAX_READ_IMAGE_ARGS</code>, <code class="constant">CL_DEVICE_MAX_WRITE_IMAGE_ARGS</code>, |
| <code class="constant">CL_DEVICE_IMAGE2D_MAX_WIDTH</code>, <code class="constant">CL_DEVICE_IMAGE2D_MAX_HEIGHT</code>, |
| <code class="constant">CL_DEVICE_IMAGE3D_MAX_WIDTH</code>, <code class="constant">CL_DEVICE_IMAGE3D_MAX_HEIGHT</code>, |
| <code class="constant">CL_DEVICE_IMAGE3D_MAX_DEPTH</code> and <code class="constant">CL_DEVICE_MAX_SAMPLERS</code> by the |
| implementation must be greater than or equal to the minimum values specified in table 4.3 |
| (see <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a>). |
| </p> |
| <h4><a id="id-1.6.6"></a>Minimum List of Supported Image Formats</h4> |
| <p> |
| For 1D, 1D image from buffer, 2D, 3D image objects, 1D and 2D image array objects, the |
| mandated minimum list of image formats that must be supported by all devices (that can be read |
| from or written to by a kernel but not both) that support images is described |
| in the table below (Table 5.8a): |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| <col align="left" class="col3" /> |
| <col align="left" class="col4" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>num_channels</p> |
| </div> |
| </th> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>channel_order</p> |
| </div> |
| </th> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>channel_data_type</p> |
| </div> |
| </th> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>read/write</p> |
| </div> |
| </th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>1</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_R</p> |
| </div> |
| </td> |
| <td align="left"><div class="literallayout"><p>CL_UNORM_INT8<br /> |
| CL_UNORM_INT16<br /> |
| CL_SNORM_INT8<br /> |
| CL_SNORM_INT16<br /> |
| <br /> |
| CL_SIGNED_INT8<br /> |
| CL_SIGNED_INT16<br /> |
| CL_SIGNED_INT32<br /> |
| CL_UNSIGNED_INT8<br /> |
| CL_UNSIGNED_INT16<br /> |
| CL_UNSIGNED_INT32<br /> |
| <br /> |
| CL_HALF_FLOAT<br /> |
| CL_FLOAT<br /> |
| </p></div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>read+write</p> |
| </div> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>1</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_DEPTH</p> |
| </div> |
| </td> |
| <td align="left"><div class="literallayout"><p>CL_UNORM_INT16<br /> |
| CL_FLOAT<br /> |
| </p></div> |
| </td> |
| <td align="left"><div class="literallayout"><p>read+write</p></div> |
| <code class="constant">CL_DEPTH</code> channel order is supported only for 2D image and 2D image array objects. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>2</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_RG</p> |
| </div> |
| </td> |
| <td align="left"><div class="literallayout"><p>CL_UNORM_INT8<br /> |
| CL_UNORM_INT16<br /> |
| CL_SNORM_INT8<br /> |
| CL_SNORM_INT16<br /> |
| <br /> |
| CL_SIGNED_INT8<br /> |
| CL_SIGNED_INT16<br /> |
| CL_SIGNED_INT32<br /> |
| CL_UNSIGNED_INT8<br /> |
| CL_UNSIGNED_INT16<br /> |
| CL_UNSIGNED_INT32<br /> |
| <br /> |
| CL_HALF_FLOAT<br /> |
| CL_FLOAT<br /> |
| </p></div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>read+write</p> |
| </div> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>4</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_RGBA</p> |
| </div> |
| </td> |
| <td align="left"><div class="literallayout"><p>CL_UNORM_INT8<br /> |
| CL_UNORM_INT16<br /> |
| CL_SNORM_INT8<br /> |
| CL_SNORM_INT16<br /> |
| <br /> |
| CL_SIGNED_INT8<br /> |
| CL_SIGNED_INT16<br /> |
| CL_SIGNED_INT32<br /> |
| CL_UNSIGNED_INT8<br /> |
| CL_UNSIGNED_INT16<br /> |
| CL_UNSIGNED_INT32<br /> |
| <br /> |
| CL_HALF_FLOAT<br /> |
| CL_FLOAT<br /> |
| </p></div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>read+write</p> |
| </div> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>4</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_BGRA</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_UNORM_INT8</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>read+write</p> |
| </div> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>4</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_sRGBA</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_UNORM_INT8</p> |
| </div> |
| </td> |
| <td align="left"> |
| read+write if the |
| <a class="citerefentry" href="cl_khr_srgb_image_writes.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_srgb_image_writes</span></span></a> |
| extension is supported, else read only. |
| sRGB channel order support is not required for 1D image buffers. |
| Writes to images with sRGB channel orders |
| requires device support of the |
| <a class="citerefentry" href="cl_khr_srgb_image_writes.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_srgb_image_writes</span></span></a> |
| extension. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>1</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_DEPTH_STENCIL</p> |
| </div> |
| </td> |
| <td align="left"><div class="literallayout"><p>CL_UNORM_INT24<br /> |
| CL_FLOAT<br /> |
| </p></div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>read only (applies if the<br /> |
| <a class="citerefentry" href="cl_khr_gl_depth_images.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_gl_depth_images</span></span></a><br /> |
| extension is enabled)</p> |
| </div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <p> |
| For 1D, 1D image from buffer, 2D, 3D image objects, 1D and 2D image array objects, the |
| mandated minimum list of image formats that must be supported by all devices (that can be read |
| from and written to by a kernel) that support images is described |
| in the table below (Table 5.8b): |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| <col align="left" class="col3" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>num_channels</p> |
| </div> |
| </th> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>channel_order</p> |
| </div> |
| </th> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>channel_data_type</p> |
| </div> |
| </th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>1</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_R</p> |
| </div> |
| </td> |
| <td align="left"><div class="literallayout"><p>CL_UNORM_INT8<br /> |
| CL_SIGNED_INT8<br /> |
| CL_SIGNED_INT16<br /> |
| CL_SIGNED_INT32<br /> |
| CL_UNSIGNED_INT8<br /> |
| CL_UNSIGNED_INT16<br /> |
| CL_UNSIGNED_INT32<br /> |
| CL_HALF_FLOAT<br /> |
| CL_FLOAT<br /> |
| </p></div> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>4</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_RGBA</p> |
| </div> |
| </td> |
| <td align="left"><div class="literallayout"><p>CL_UNORM_INT8<br /> |
| CL_UNORM_INT16<br /> |
| CL_SIGNED_INT8<br /> |
| CL_SIGNED_INT16<br /> |
| CL_SIGNED_INT32<br /> |
| CL_UNSIGNED_INT8<br /> |
| CL_UNSIGNED_INT16<br /> |
| CL_UNSIGNED_INT32<br /> |
| CL_HALF_FLOAT<br /> |
| CL_FLOAT<br /> |
| </p></div> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>1</p> |
| </div> |
| </td> |
| <td align="left"> |
| <div class="literallayout"> |
| <p>CL_DEPTH_STENCIL (applies if the<br /> |
| <a class="citerefentry" href="cl_khr_gl_depth_images.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_gl_depth_images</span></span></a><br /> |
| extension is enabled)</p> |
| </div> |
| </td> |
| <td align="left"><div class="literallayout"><p>CL_UNORM_INT24<br /> |
| CL_FLOAT<br /> |
| </p></div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <h4><a id="id-1.6.11"></a> Image format mapping to OpenCL C image access qualifiers</h4> |
| <p> |
| Image arguments to kernels may have the <code class="constant">read_only</code>, <code class="constant">write_only</code> or <code class="constant">read_write</code> |
| qualifier. Not all image formats supported by the device and platform are valid to be passed to all |
| of these access qualifiers. For each access qualifier, only images whose format is in the list of |
| formats returned by clGetSupportedImageFormats with the given flag arguments in the table below are |
| permitted. It is not valid to pass an image supporting writing as both a read_only image and a |
| write_only image parameter, or to a read_write image parameter and any other image parameter. |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>Access Qualifier</p> |
| </div> |
| </th> |
| <th align="left"> |
| <div class="literallayout"> |
| <p>cl_mem_flags</p> |
| </div> |
| </th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <code class="constant">read_only</code> |
| </td> |
| <td align="left"> |
| <code class="constant">CL_MEM_READ_ONLY</code>, |
| <code class="constant">CL_MEM_READ_WRITE</code>, |
| <code class="constant">CL_MEM_KERNEL_READ_AND_WRITE</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">write_only</code> |
| </td> |
| <td align="left"> |
| <code class="constant">CL_MEM_WRITE_ONLY</code>, |
| <code class="constant">CL_MEM_READ_WRITE</code>, |
| <code class="constant">CL_MEM_KERNEL_READ_AND_WRITE</code> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">read_write</code> |
| </td> |
| <td align="left"> |
| <code class="constant">CL_MEM_KERNEL_READ_AND_WRITE</code> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <h4><a id="id-1.6.14"></a>Additional notes if the <a class="citerefentry" href="cl_khr_gl_depth_images.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_gl_depth_images</span></span></a> |
| extension is enabled:</h4> |
| <p> |
| For the image format given by channel order of |
| <code class="constant">CL_DEPTH_STENCIL</code> and channel data type of |
| <code class="constant">CL_UNORM_INT24</code>, the depth is |
| stored as an unsigned normalized 24-bit value. |
| </p> |
| <p> |
| For the image format given by channel order of |
| <code class="constant">CL DEPTH_STENCIL</code> and channel data type of |
| <code class="constant">CL_FLOAT</code>, each pixel is two 32-bit values. |
| The depth is stored as a single precision floating |
| point value followed by the stencil which is stored as a 8-bit integer value. |
| </p> |
| <p> |
| The stencil value cannot be read or written using the |
| <code class="function">read_imagef</code> and |
| <code class="function">write_imagef</code> |
| built-in functions in an OpenCL kernel. |
| </p> |
| <p> |
| Depth image objects with an image channel order = |
| <code class="constant">CL_DEPTH_STENCIL</code> cannot be used as |
| arguments to |
| <a class="citerefentry" href="clEnqueueReadImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadImage</span></span></a>, |
| <a class="citerefentry" href="clEnqueueWriteImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteImage</span></span></a>, |
| <a class="citerefentry" href="clEnqueueCopyImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyImage</span></span></a>, |
| <a class="citerefentry" href="clEnqueueCopyImageToBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyImageToBuffer</span></span></a>, |
| <a class="citerefentry" href="clEnqueueCopyBufferToImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBufferToImage</span></span></a>, |
| <a class="citerefentry" href="clEnqueueMapImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapImage</span></span></a> and |
| <a class="citerefentry" href="clEnqueueFillImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueFillImage</span></span></a> |
| and will return a <span class="errorname">CL_INVALID_OPERATION</span> error. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="errors"></a> |
| <h2>Errors</h2> |
| <p> |
| Returns <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_CONTEXT</span> if <code class="varname">context</code> is not a valid context. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">flags</code> or |
| <code class="varname">image_type</code> are not valid, or if <code class="varname">num_entries</code> |
| is 0 and <code class="varname">image_formats</code> is not NULL. |
| </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=136" 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>, |
| <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</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> |
