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12ce8f687d
Added the EAGL backend authored by Dean Jackson from Apple, and the refactoring changes needed to support it side-by-side with the macOS backend. Ran "git cl format" against these diffs. Defined the EGL_ANGLE_device_eagl extension and allocated an enum out of ANGLE's reserved range. The iOS backend is not yet included in any of the GN files. Bug: angleproject:4263 Change-Id: I631c32930433c03bb16a242955ffedf55174bb29 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1987278 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Reviewed-by: James Darpinian <jdarpinian@chromium.org> Commit-Queue: Kenneth Russell <kbr@chromium.org>
90 lines
1.8 KiB
Plaintext
90 lines
1.8 KiB
Plaintext
Name
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ANGLE_device_eagl
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Name Strings
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EGL_ANGLE_device_eagl
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Contributors
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Dean Jackson (dino 'at' apple.com)
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Ken Russell (kbr 'at' google.com)
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Contact
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Ken Russell (kbr 'at' google.com)
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Status
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Draft
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Version
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Version 1, January 3, 2020
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Number
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EGL Extension #XXX
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Extension Type
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EGL device extension
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Dependencies
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This extension is written against the language of EGL 1.5 as
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modified by EGL_EXT_device_query.
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EGL_EXT_device_query is required.
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Overview
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ANGLE on iOS internally uses an OpenGL ES context allocated via EAGL.
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This extension defines a mapping from an EGL device to the underlying
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EAGLContext, after it's been queried from an EGL display.
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IP Status
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No known claims.
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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 a queried <attribute> in eglQueryDeviceAttribEXT:
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EGL_EAGL_CONTEXT_ANGLE 0x348C
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Add a new section 2.1.3 (EAGL Devices) after 2.1.2 (Devices)
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On iOS the underlying EAGLContext can be queried from the EGL device. The
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intented purpose is to allow applications to create new EAGLContexts which
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share resources with this one.
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Changes to section 3.2 (Devices)
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Replace the paragraph immediately following the prototype for
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eglQueryDeviceAttribEXT:
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<attribute> must be EGL_EAGL_CONTEXT_ANGLE. On success, EGL_TRUE is
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returned, and a valid EAGLContext corresponding to the EGL device is
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returned in <value>. This object is compatible with OpenGL ES and EAGL API
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functions. If the EGL device is not currently associated with an
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EAGLContext, EGL_BAD_ATTRIBUTE is returned, and <value> is left unchanged.
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Issues
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None
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Revision History
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Version 1, January 3, 2020 (Ken Russell)
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- Initial Draft
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