Talk:QuickDraw

message: Regarding the recent stuff added about the internal mechanism in regions - is it too detailed? Actually I found it quite interesting, and haven't changed it much, but in many respects it's kinda not all that relevant to QuickDraw HOW these regions work, and besides, as they are not documented publicly by Apple, is it really our job to do so? Who is the information going to help? Graham 06:11, 14 January 2006 (UTC)
thread_title:  Regions 

message: The part which says
"Regions are implemented using both vertical and horizontal compression. A region is described as a series of horizontal lines ("rasters"), with the interior and exterior portions of the region within a line described by their run length (the number of pixels in the run). Identical adjacent runs are efficiently encoded by a line repeat count"
is in contraddiction with how the region internals are described at a site () I found.
Not being an expert of the matter, I wouldn't know for sure who's correct and who's not, however at that site you can find working code which deals with the representation described there, which I assume works as expected, and this would mean that effectively the description that wikipedia sports now is incorrect
The description on the MacTech site linked above is correct. The flaws in the current text are as follows:
* There are no run-lengths encoded in a Region; it uses horizontal coordinates. (There was no advantage to using the run-length horizontally, because QuickDraw in general, and Regions as part of it, only ever worked with 16-bit coordinates. On a 680x0 processor you got much more benefit from keeping everything 2-byte aligned than you did by saving a byte or two here and there.)
* The identical adjacent runs are encoded by vertical coordinates, not a repeat count.
I've done some reverse-engineering of the Region format myself, and then later worked directly with it when I was working on 2D hardware graphics acceleration at Apple. --Drewthaler 07:44, 14 September 2007 (UTC)
thread_title:  Internal Region structure 

message: My understanding is that Bill wrote most if not all of QuickDraw (and was very proprietorial over it). Is there therefore fair to credit Andy first? I'm not saying Andy didn't contribute, but I'm sure Andy would be the first person to say that QuickDraw was Bill's baby. 80.93.170.99 12:30, 7 March 2007 (UTC)
replies: text: Makes sense to me. --Steven Fisher 15:38, 8 March 2007 (UTC)
thread_title:  Authorship 

message: The statement that "In Mac OS X v10.8, QuickDraw support was removed from the operating system" is clearly false.  As far as I know, programs written with QuickDraw continue to work in OS 10.11.  The next sentence, "Applications using QuickDraw will still run under OS X 10.8; however, the current versions of Xcode and the OS X SDK do not contain the header files to compile such programs" is more nearly right, however it was the 10.7 SDK that first removed QuickDraw.  I can't find a reference for that fact, so if I made that change, someone could justifiably complain that it's original research.
 JWWalker (talk) 00:45, 7 January 2016 (UTC)
thread_title:  Removal from OS and Xcode 

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thread_title:  External links modified 

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thread_title:  External links modified