eglChooseConfig() allows you to specify a set of config attributes for color depths (EGL_RED_SIZE/etc.) for your frame buffer. However, there doesn't seem to be a way to specify the format such as ARGB, RGBA, XRGB, RGBX as is possible in DirectX. You seem to be able to do this for textures, but not during initial frame buffer context setup for OpenGL ES 3+.
Is that correct? Are there no ways to specify XRGB vs ARGB explicit?
I know I can practically do this by creating an RGBA format and then always assuming the A is 255 in shaders. My goal would be to get XRGB format.