Graphics/font/platform backends with common interfaces?

[Taylor Hillegeist via Digitalmars-d-learn]

On Wednesday, 23 December 2015 at 20:57:27 UTC, Taylor Hillegeist 
wrote:
> On Wednesday, 23 December 2015 at 20:52:05 UTC, Adam D. Ruppe 
> wrote:
>> On Wednesday, 23 December 2015 at 20:49:21 UTC, Taylor 
>> Hillegeist wrote:
>>> |  GRAPICS LIB  |
>>> +---+---+-------+ <----- what is this interface
>>> |SDL|GDI|OPENGL.|
>>> +---+---+-------+
>>
>> SDL, GDI, and OpenGL *are* graphics libs so it seems a bit 
>> silly to put an interface there.
>
> I guess I'm thinking that to be able to switch between 
> backends(gdi sdl) you use you must have a common interface. And 
> if everyone had the same common interface it could be nice 
> right?

maybe this is more what I'm thinking.

  +-----------------+
  |     USER APP    |
  +-----------------+
  |     GUI LIB     |
  +-----------------+ <----- what is this interface
  |    GenericGL    |
  +-----------------+ <----- what is this interface
  |    NativeGL     |
  +-----------------+