> It seems to me that we have arrived at the conclusion that a good drawing API > should be mostly stateless (like Moz2D), instead of Cairo's stateful API. As > a result we are currently removing all uses of the Cairo API and we will > eventually remove Cairo from our codebase altogether (in favor of D2D via > Moz2D on Windows and Skia via Moz2D elsewhere). > > The C++ CS is free to standardize whatever they like, but if they ask for our > opinion we probably want to point them at Moz2D instead of Cairo. > > That having said, for maximum performance there is a fair amount of detailed > knowledge callers need to have about the innards of Moz2D backends. You > sometimes want to explicitly wrap a draw target around a texture and then > use that texture in the compositor, etc. So I am not sure you can have a > nice, non-leaky abstraction for 2D graphics in the language. > > My best guess is that whatever they standardize will end up not being useful > for high-performance applications. In that case, I wonder why bother. A > library really might do just fine here.
> My best guess is that whatever they standardize will end up not being useful > for high-performance applications. In that case, I wonder why bother. A > library really might do just fine here. I think at least one of the goals of the standard drawing API is to make C++ easier to learn by allowing people learning the language to create simple graphical applications without having to set up third-party libraries or learn a complicated API. I will ask for clarification at the SG 13 meeting (which I found out will be tomorrow afternoon) regarding the drawing API's goals, including whether high-performance applications are in scope. Are the advantages of a stateless API over a stateful API specific to high-performance applications, or are they more general? I would like to learn more about the tradeoffs between stateful and stateless drawing APIs. If anyone can point me to a resource about this, I would be grateful. Thanks, Botond _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
