fix bug [2021677] egl driver unloaded after eglTerminate() is called

refactored the code so that:
- EGL APIs that can be called before or after eglInitialize() will work by loading the drivers first
- make eglGetDisplay() a lot more efficient
- make sure that EGL drivers are loaded in a thread-safe way
- don't unload the drivers upon calling eglTerminate(), they're now never unloaded, since there is no safe way to do it (some thread could be running)
- updated our EGL version to 1.4
- return better error codes if errors happen during initialization

1 files changed, 0 insertions, 1 deletions

diff --git a/opengl/libs/egl_impl.h b/opengl/libs/egl_impl.h
index c5f753d..ac286cb 100644
--- a/opengl/libs/egl_impl.h
+++ b/opengl/libs/egl_impl.h
@@ -35,7 +35,6 @@ struct egl_connection_t
     gl_hooks_t *        hooks;
     EGLint              major;
     EGLint              minor;
-    int                 unavailable;
 };
 
 EGLAPI EGLImageKHR egl_get_image_for_current_context(EGLImageKHR image);