gl_sharing

Allow applications to use OpenGL buffer, texture and renderbuffer objects as OpenCL memory objects.

#pragma OPENCL EXTENSION CL_APPLE_gl_sharing : enable #pragma OPENCL EXTENSION CL_KHR_gl_sharing : enable

Description

These OpenCL functions allow applications to use OpenGL buffer, texture and renderbuffer objects as OpenCL memory objects. This allows efficient sharing of data between OpenCL and OpenGL. The OpenCL API may be used to execute kernels that read and/or write memory objects that are also OpenGL objects. An OpenCL image object may be created from an OpenGL texture or renderbuffer object. An OpenCL buffer object may be created from an OpenGL buffer object.

OpenCL memory objects may be created from OpenGL objects only if the OpenCL context has been created from an OpenGL share group object or context. OpenGL share groups and contexts are created using platform-specific APIs such as EGL, CGL, WGL, and GLX.

On MacOS X, an OpenCL context may be created from an OpenGL share group object using the OpenCL platform extension CL_APPLE_gl_sharing.

On other platforms including Microsoft Windows, Linux/Unix and others, an OpenCL context may be created from an OpenGL context using the Khronos platform extension CL_KHR_gl_sharing. Refer to the platform documentation for your OpenCL implementation, or visit the Khronos Registry at http://www.khronos.org/registry/cl/ for more information.

Any supported OpenGL object defined within the GL share group object, or the share group associated with the GL context from which the CL context is created, may be shared, with the exception of the default OpenGL objects (i.e. objects named zero), which may not be shared.

Specification

OpenCL Specification

Also see

EXTENSION

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