On 31/03/16 20:27, Oscar Benjamin wrote: >>> OpenGL plays nicely with Windows and Linux as well. >> >> mix n' match the OSX graphics libraries. You can't do that as easily >> in X or Windows is an add-on library, not a native part of the OS. > > That's interesting. I've used OpenGL on Windows and Linux but not on > OSX so I'm not sure exactly what you mean.
I can't speak for Linux because, although it's my main platform I've not done much graphics on it. But on Windows the core OS APIs all use a device context or GDI object to do their painting. To use OpenGL you need to bridge between the GDI of native windows and the OpenGL libraries. If you want to draw a moving string for instance you need to either use the Windows graphics system or the OpenGL system. In MacOS X the ODS system is OpenGL so you can use the native API interleaved with your OpenGL code. > (Unity, Gnome3, KDE4, etc.) use OpenGL-based compositing just like OSX > does and I'm fairly sure Android does as well. Does it just work out > better on OSX? That's news to me, I thought they(Linux) all worked through the X layers (Xlib, Xt etc). > I know that work is under way to replace X itself with Wayland and > reimplement the core toolkits (Gtk, Qt, etc) on top of Wayland with > OpenGL as the core Yes, and at that point I'd expect Linux to be as seamless as MacOS. But for now it seems to me that you still have to initialise libraries and explicitly link your OpenGL objects to your OS (X)windows etc. In short you have to tell the OS GUI that you are choosing to render on OpenGL and/or use the OpenGL library routines to do any drawing. It's a one or the other approach. In MacOS it's (almost) a mix n match approach, you can use whichever API call is easier for you, OS or OpenGL native and interleave them. There are some issues that arise but I don't do enough graphics work to fully understand them! For my simple needs it all pretty much just worked. PS. When I write MacOS above I suspect I should really be saying Cocoa, but I'm, not even expert enough in MacOSX to be sure of that! :-) -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
