CEAGL

Apple EAGL to EGL wrapper, for lazy people like me

How can this be integrated?

This collection of snippets was designed to be plugged in between the AppDelegate and EGL code. The EGL support only extends to:

• Giving information on the current EGL context (with some dummy information)
• Giving you an EGL-like context for OpenGL ES execution
• Gluing the EGL lifecycle into the AppDelegate
• Creating an EAGLContext and GLKView in the background, without having to do it yourself

The current integration works as such:

• The AppDelegate stores a pointer to itself in a global symbol uikit_appdelegate, which can later be accessed by the class EGLView when the consumer calls eglGetDisplay().
• The EGLView will be created with EGL_OPENGL_ES2_BIT by default, because OpenGL ES 1.0 is not useful, and the EGLView creates a context that supports OpenGL ES 2.0+ context.
• After the context is created, you are free to call functions from the OpenGL ES framework.

Current issues

• Currently, you still have to make AppDelegate call out to your code for looping. This should probably remain that way.
• Creating multiple shared/non-shared contexts is not yet supported, but migrating the context across threads should work.
• You cannot control swapping intervals. This is enforced by iOS by default, and is probably for the best.
• The only type of rendering surface supported is the default GLKView framebuffer