Re: [XaraXtreme-dev] Moving to Cairo (was Ping)

[Phil Martin <phil@xxxxxxxx>]

Alex Bligh wrote:
> I am proposing to modify the code base so it internally can either
> call Cairo to draw, or to call GDraw, with the switch probably being
> made at the GDrawContext level, or (possibly) through a derived
> class of GRenderRegion though I expect because of the deep class 
> hierarchy
> there that the latter is going to be harder. As I understand what
> Carl has done, he's produced a hacked up version of GDrawContext
> (or XaDrawContext or whatever it is called today) which calls Cairo
> not GDraw. This could just as easily be a separate class. And we can
> tidy up the class interface to GDrawContext (rather than the CDraw
> 'C' API) so it makes fewer assumption about the underlying drawing
> engine relatively easily, I think.
>
> Alex

Creating a new RenderRegion-derived class is probably the "correct" way 
to do it and that would allow you to use the existing RRCaps mechanism 
to express the capabilities of the new class to the rest of the system.

Phil