ebb05bcb64
Instead of having a hardcoded series of if-statements in cogl_is_texture to determine which types should appear as texture subclasses, they are now stored in a GSList attached to the Cogl context. The list is amended to using a new cogl_texture_register_type function. There is a convenience macro called COGL_TEXTURE_DEFINE which uses COGL_HANDLE_DEFINE_WITH_CODE to register the texture type when the _get_type() function is first called.