Re: [AD] clipping line algorithm

[Sven Sandberg <svens@xxxxxxxxxx>]

Eric Botcazou wrote:
> > I'm sorry, but what do you mean by that last sentence? If you mean "use
> > vtable by default, but as a special case use bmp_read* if the BITMAP
> > supports that", then I'm with you, that's what I wanted all the time.
> > Otherwise, please explain what you mean...
>
> No trickery with flags or something like that. We test the signature of the 
> method (aka its address) and, if we recognize it, we can optimize provided 
> that certain conditions are met.

Do you mean we should replace the current implementation of 
is_linear_bitmap() by

   return (bmp->vtable->putpixel == _linear_putpixel8) ||
          (bmp->vtable->putpixel == _linear_putpixel15) ||
          (bmp->vtable->putpixel == _linear_putpixel16) ||
          (bmp->vtable->putpixel == _linear_putpixel24) ||
          (bmp->vtable->putpixel == _linear_putpixel32);

?

Sven