Ratification Status

Ratified

Extension and Version Dependencies

None

Other Extension Metadata

Last Modified Date

2020-04-21

IP Status

No known IP claims.

Description

cl_khr_egl_event allows creating OpenCL event objects linked to EGL fence sync objects, potentially improving efficiency of sharing images and buffers between the two APIs. The companion EGL_KHR_cl_event extension provides the complementary functionality of creating an EGL sync object from an OpenCL event object.

New Commands

  • clCreateEventFromEGLSyncKHR

New Enums

  • cl_command_type

    • CL_COMMAND_EGL_FENCE_SYNC_OBJECT_KHR

Issues

Most issues are shared with cl_khr_gl_event and are resolved as described in that extension.

  1. Should we support implicit synchronization?

    RESOLVED: No, as this may be very difficult since the synchronization would not be with EGL, it would be with currently bound EGL client APIs. It would be necessary to know which client APIs might be bound, to validate that they’re associated with the EGLDisplay associated with the OpenCL context, and to reach into each such context.

  2. Do we need to have typedefs to use EGL handles in OpenCL?

    RESOLVED Using typedefs for EGL handles.

  3. Should we restrict which CL APIs can be used with this cl_event?

    RESOLVED Use is limited to calls to acquire and release memory objects only.

  4. What is the desired behavior for this extension when EGLSyncKHR is of a type other than EGL_SYNC_FENCE_KHR?

    RESOLVED This extension only requires support for EGL_SYNC_FENCE_KHR. Support of other types is an implementation choice, and will result in CL_INVALID_EGL_OBJECT_KHR if unsupported.

Version History

  • Revision 1.0.0, 2020-04-21

    • First assigned version.

See Also

No cross-references are available

Document Notes

For more information, see the OpenCL Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0