| Name |
| |
| ANGLE_platform_angle_device_context_volatile_eagl |
| |
| Name Strings |
| |
| EGL_ANGLE_platform_angle_device_context_volatile_eagl |
| |
| Contributors |
| Kimmo Kinnunen, Apple |
| Kenneth Russell, Google |
| |
| Contacts |
| Kimmo Kinnunen, Apple (kkinnunen 'at' apple 'dot' org) |
| Kenneth Russell, Google (kbr 'at' chromium 'dot' org) |
| |
| Status |
| |
| Draft |
| |
| Version |
| |
| Version 1, 2020-09-30 |
| |
| Number |
| |
| EGL Extension XXX |
| |
| Extension Type |
| |
| EGL client extension |
| |
| Dependencies |
| |
| Requires ANGLE_platform_angle. |
| |
| Overview |
| |
| This extension allows the client to request a Display that internally |
| is able to function even if client changes current EAGL context of the |
| thread. Requesting a volatile device context contexts may impact performance. |
| The extension is useful for using EGL in a library that cannot guarantee |
| which platform APIs its clients will use. |
| |
| New Types |
| |
| None |
| |
| New Procedures and Functions |
| |
| None |
| |
| New Tokens |
| |
| Accepted as an attribute name in the <attrib_list> argument of |
| eglGetPlatformDisplayEXT: |
| |
| EGL_PLATFORM_ANGLE_DEVICE_CONTEXT_VOLATILE_EAGL_ANGLE 0x34A2 |
| |
| Additions to the EGL Specification |
| |
| None. |
| |
| New Behavior |
| |
| To request a display that internally supports the feature, |
| use the attribute EGL_PLATFORM_ANGLE_DEVICE_CONTEXT_VOLATILE_EAGL_ANGLE. |
| EGL_TRUE enables volatile EAGL device context and EGL_FALSE disables it. |
| Any value other than these will result in an error. |
| The default value for EGL_PLATFORM_ANGLE_DEVICE_CONTEXT_VOLATILE_EAGL_ANGLE |
| is EGL_FALSE. |
| |
| When the device context of the display is set as volatile EAGL, then |
| each EGL function will change the current EAGL context state accordingly |
| to use the internal device context, if needed. If the internal device context |
| is not using EAGL, the property has no effect. |
| |
| Calls to OpenGL or OpenGL ES functions will not ensure the underlying device |
| context is correct. If the state of the current EAGL context is unknown, |
| clients should call MakeCurrent to ensure that the internal device |
| context is made current. |
| |
| Issues |
| |
| None |
| |
| Revision History |
| |
| Version 1, 2020-09-30 (Kimmo Kinnunen) |
| - Initial draft |