зеркало из https://github.com/AvaloniaUI/angle.git
83 строки
2.0 KiB
Plaintext
83 строки
2.0 KiB
Plaintext
Name
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ANGLE_display_semaphore_share_group
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Name Strings
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EGL_ANGLE_display_semaphore_share_group
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Contributors
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Peng Huang, Google
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Contacts
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Peng Huang, Google (penghuang 'at' google.com)
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Status
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Draft
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Version
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Version 1, July 27, 2020
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Number
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EGL Extension TBD
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Dependencies
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This extension is written against the wording of the EGL 1.5 specification.
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Overview
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This extension allows for the creation of OpenGL ES contexts that share
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semaphore objects with other contexts owned by the same display. This method
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of sharing semaphores can be used in conjuction with regular share groups.
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New Types
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None
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New Procedures and Functions
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None
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New Tokens
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Accepted as an attribute name in the <*attrib_list> argument to
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eglCreateContext:
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EGL_DISPLAY_SEMAPHORE_SHARE_GROUP_ANGLE 0x348D
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Additions to the EGL 1.5 Specification
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Add a new section entitled "OpenGL ES Global Semaphore Share Groups"
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to section 3.7.1:
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"If the attribute EGL_DISPLAY_SEMAPHORE_SHARE_GROUP_ANGLE is set to EGL_TRUE,
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a context that shares semaphores with other contexts owned by the same
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display and created with EGL_DISPLAY_SEMAPHORE_SHARE_GROUP_ANGLE set to
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EGL_TRUE will be created. If the share_context parameter to
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eglCreateContext is not NULL, all contexts within the share group must have
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been created with the same value of EGL_DISPLAY_SEMAPHORE_SHARE_GROUP_ANGLE.
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The default value of EGL_DISPLAY_SEMAPHORE_SHARE_GROUP_ANGLE is EGL_FALSE."
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Issues
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(1) What happens to the shared semaphores when a context in the global share
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group is destroyed?
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RESOLOVED: When the last context in the global semaphore share group is
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destroyed, all semaphores in the global semaphore share group are released. If
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a new context is created in the global semaphore share group, no semaphores
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will exist.
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This mirrors how regular share groups work, releasing all objects when the
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last context is destroyed.
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Revision History
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Version 1, 2020/07/27 - first draft.
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