[RFC] Better OpenGL separation
Alexandre Julliard
julliard at winehq.com
Mon Nov 11 15:43:07 CST 2002
Lionel Ulmer <lionel.ulmer at free.fr> writes:
> 1) As almost all WGL functions have an HDC or OpenGL context argument (for
> those having a context argument, the corresponding HDC can easily be
> found). Thus one solution would be to use 'DC_GetDCPtr' to get the DC
> pointer and then move all these functions in the GDI function pointer
> table.
>
> The problem with that is that 'DC_GetDCPtr' is already flagged as a hack
> and so I am bit reluctant to use it :-)
>
> 2) Put all HDC function in GDI itself and replace in OpenGL's spec file all
> of these by forwards to GDI.
>
> 3) Use the ExtEscape mechanism to not only get specific variables, but
> something akin to what DDraw does to get the HAL function pointer table
> and then use these pointers to do the real low level work in the WGL
> functions.
>
> For the moment, I think 3) is the best. Feel free to propose other solutions
> :-)
I don't know, I think the current way is not so bad. It's better to
export just a couple of internal things like display and drawable than
a full table of functions that will be a pain to keep compatible
across versions. If you really want to get rid of the escapes then I
think 2) would be cleaner.
--
Alexandre Julliard
julliard at winehq.com
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