[XaraXtreme-dev] Cairo Port

[Jonas Diemer <diemer@xxxxxx>]

Hi everyone,

I have been looking at Carl Worth's "lame attempt at fixing up the 
xaralx code to use cairo instead of a proprietary CDraw.a" for the past 
few hours. I have no experience with neither Xara nor Cairo, so I have a 
few questions:

1. Carl created stubs for function calls to CDraw functions, which are 
to be replaced by Cairo functions. Wouldn't it be easier to derive a new 
GDrawContext instead? This has been done originally with GDrawAsm as a 
C++ wrapper for the assemblerfunctions in GDRAW.DLL. I think this would 
at least save passing around contexts, and would be more object 
oriented, too.

2. I am so far struggling with the very basic: I need to set up a cairo 
context. To do this, I need a "drawable", i.e. some canvas I can draw 
to. I have found examples on how to do this from GTK/GDK, and I guess 
wxWidget is using a GTK backend...
I think I need a pointer to some wxWidget-canvas or so, but I am not 
sure where the link between the wxWidget frontend and the GDRAW backend 
is supposed to be.

I hope someone can help me with this, so I can get started. I don't 
really have a whole lot of time for this, but maybe we can get the cairo 
backend into a reasonable state together.

Best regards,
Jonas

PS: I will be on vacation starting May 7, so my mail responses may be slow.