Re: Large over 100K pixel high ruler scroll view
Re: Large over 100K pixel high ruler scroll view
- Subject: Re: Large over 100K pixel high ruler scroll view
- From: Jens Alfke <email@hidden>
- Date: Mon, 29 Aug 2011 21:01:12 -0700
On Aug 29, 2011, at 7:18 PM, Julie Porter wrote:
> In some ways it is too bad I can not call the cocoa classes from a postscript syntax, considering that the program already defines the data in arrays of dictionaries. I think at one time there was interactive postscript on the NEXT. Not sure if any of that still exists or not.
NeXTSTEP used Display PostScript; ripping this out and replacing it with a new graphics system (CoreGraphics aka Quartz) was one of the big tasks in the transition to Mac OS X. There’s some appeal to the idea of sending graphics to the display system as executable code, but it was very inefficient. (It was also proprietary code owned by Adobe, which demanded a fairly steep per-copy licensing fee.)
There’s not really any direct correlation between a tree-based data structure (NSArrays/NSDictionaries) and PostScript. You’d just end up translating one representation into another (textual) one before having it rendered; calling CG directly skips that step.
—Jens_______________________________________________
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