| Name |
| |
| ANGLE_device_cgl |
| |
| Name Strings |
| |
| EGL_ANGLE_device_cgl |
| |
| Contributors |
| |
| Ken Russell (kbr 'at' google.com) |
| Geoff Lang (geofflang 'at' google.com) |
| |
| Contact |
| |
| Ken Russell (kbr 'at' google.com) |
| |
| Status |
| |
| Draft |
| |
| Version |
| |
| Version 1, October 4, 2019 |
| |
| Number |
| |
| EGL Extension #XXX |
| |
| Extension Type |
| |
| EGL device extension |
| |
| Dependencies |
| |
| This extension is written against the language of EGL 1.5 as |
| modified by EGL_EXT_device_query. |
| |
| EGL_EXT_device_query is required. |
| |
| Overview |
| |
| ANGLE on macOS internally uses an OpenGL context allocated via CGL. |
| This extension defines a mapping from an EGL device to the underlying |
| CGLContextObj and its associated CGLPixelFormatObj, after it's been |
| queried from an EGL display. |
| |
| IP Status |
| |
| No known claims. |
| |
| New Types |
| |
| None. |
| |
| New Procedures and Functions |
| |
| None. |
| |
| New Tokens |
| |
| Accepted as a queried <attribute> in eglQueryDeviceAttribEXT: |
| |
| EGL_CGL_CONTEXT_ANGLE 0x3485 |
| EGL_CGL_PIXEL_FORMAT_ANGLE 0x3486 |
| |
| Add a new section 2.1.3 (CGL Devices) after 2.1.2 (Devices) |
| |
| On macOS the underlying CGLContextObj and CGLPixelFormatObj can be queried |
| from the EGL device. The intented purpose is to allow applications to create |
| new CGL contexts which share resources with this one. |
| |
| Changes to section 3.2 (Devices) |
| |
| Replace the paragraph immediately following the prototype for |
| eglQueryDeviceAttribEXT: |
| |
| <attribute> may be either EGL_CGLCONTEXT_DEVICE_ANGLE or |
| EGL_CGLPIXELFORMAT_DEVICE_ANGLE. On success, EGL_TRUE is returned, and a |
| valid CGLContextObj or CGLPixelFormatObj corresponding to the EGL device is |
| returned in <value>. These objects are compatible with OpenGL and CGL API |
| functions. If the EGL device is not currently associated with a CGL context, |
| EGL_BAD_ATTRIBUTE is returned, and <value> is left unchanged. |
| |
| Issues |
| |
| None |
| |
| Revision History |
| |
| Version 1, October 4, 2019 (Ken Russell) |
| - Initial Draft |
| Version 2, October 8, 2019 (Ken Russell) |
| - Address feedback from Geoff Lang |
