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<title>NVIDIA CUDA Library: cudaGraphicsResourceSetMapFlags</title>
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<div class="navpath"><a class="el" href="group__CUDART__INTEROP.html">Graphics Interoperability</a>
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<a class="anchor" name="g4b7e5e82663df019a4bcf03d50835465"></a><!-- doxytag: member="cuda_runtime_api.h::cudaGraphicsResourceSetMapFlags" ref="g4b7e5e82663df019a4bcf03d50835465" args="(cudaGraphicsResource_t resource, unsigned int flags)" -->
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<td class="paramname"> <em>resource</em>, </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>flags</em></td><td> </td>
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<p>
Set <code>flags</code> for mapping the graphics resource <code>resource</code>.<p>
Changes to <code>flags</code> will take effect the next time <code>resource</code> is mapped. The <code>flags</code> argument may be any of the following:<ul>
<li><a class="el" href="group__CUDART__TYPES_g2c3c3a69caaf333d29d0b38b75de5ffd.html#gg2c3c3a69caaf333d29d0b38b75de5ffd81ae074138583e9421692bec52bfe44b">cudaGraphicsMapFlagsNone</a>: Specifies no hints about how <code>resource</code> will be used. It is therefore assumed that CUDA may read from or write to <code>resource</code>.</li><li><a class="el" href="group__CUDART__TYPES_g2c3c3a69caaf333d29d0b38b75de5ffd.html#gg2c3c3a69caaf333d29d0b38b75de5ffde34096084cfafea1399b5682efd8b74c">cudaGraphicsMapFlagsReadOnly</a>: Specifies that CUDA will not write to <code>resource</code>.</li><li><a class="el" href="group__CUDART__TYPES_g2c3c3a69caaf333d29d0b38b75de5ffd.html#gg2c3c3a69caaf333d29d0b38b75de5ffd3d4fa7699e964ffc201daac20d2ecd6b">cudaGraphicsMapFlagsWriteDiscard</a>: Specifies CUDA will not read from <code>resource</code> and will write over the entire contents of <code>resource</code>, so none of the data previously stored in <code>resource</code> will be preserved.</li></ul>
<p>
If <code>resource</code> is presently mapped for access by CUDA then <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e00382e491daacef266c7b3e3c1e140a6133c">cudaErrorUnknown</a> is returned. If <code>flags</code> is not one of the above values then <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e00383e8aef5398ee38e28ed41e357b48917c">cudaErrorInvalidValue</a> is returned.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>resource</em> </td><td>- Registered resource to set flags for </td></tr>
<tr><td valign="top"></td><td valign="top"><em>flags</em> </td><td>- Parameters for resource mapping</td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd><a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038e355f04607d824883b4a50662830d591">cudaSuccess</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e00383e8aef5398ee38e28ed41e357b48917c">cudaErrorInvalidValue</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038c4673247aee4d1ab8d07871f376e0273">cudaErrorInvalidResourceHandle</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e00382e491daacef266c7b3e3c1e140a6133c">cudaErrorUnknown</a>, </dd></dl>
<dl class="note" compact><dt><b>Note:</b></dt><dd>Note that this function may also return error codes from previous, asynchronous launches.</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__CUDART__INTEROP_gb7064fb72e54d89d0666e192b45d35cc.html#gb7064fb72e54d89d0666e192b45d35cc" title="Map graphics resources for access by CUDA.">cudaGraphicsMapResources</a> </dd></dl>
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