Graphics/font/platform backends with common interfaces?

[Basile B. via Digitalmars-d-learn]

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.

yes silly, more specially as

- some of them are 2D with FP coordinates
- some of them are 2D with integral coordinates
- some of them are 2D with integral coordinates with 
transformation of the plan
- some of them are 2D with integral coordinates without 
transformation of the plan
- some of them are 3D FP float coordinates with transformation of 
the plan
- some of them are in DirectMode, some of them not.
- etc...

So this would result in 5 or 6 templatized (because of the coord 
type) interface.
IIRC Interfaces are not devirtualizables so that they can be 
extracted...

also to put SDL and OPENGL on the same level is a bit strange.