Trouble with graphics display in OS X
jhurley at infostations.com
Sat Jan 15 16:14:44 CST 2005
>James Hurley wrote:
> > In OS 9, I get a blur of numbers displayed in the field--this is fine
> > and what I would expect.
> > In OS X I get a discrete sequence of 4 numbers displayed. This is the
> > same kind of herky-jerky behavior I found with graphics display in OS
> > X (but not in OS 9.)
> > (As before, the problem is resolved by adding a line in the repeat
> > loop: wait 0 millisec, or unlock screen. But it runs much more
> > slowly.)
>Richard Gaskin wrote:
>Welcome the to the Quartz rendering engine.
>Many apps, including the Finder, have update delays. These do not
>occur with the Classic or XP versions of the engine.
>There may be additional things RunRev could do to force redraw updates,
>but I'm not sure if under the hood it would do much more than "wait 0
>with messages" -- forcing a redraw with Quartz' 16-layer compositing
>will always slow things down. Sure, you may not actually need 16-layer
>compositing, but gosh isn't it pretty? After all, it it's too slow
>Apple has an answer: buy a faster dual-processor machine. ;)
Richard et. al.,
Thanks Richard. This is what I needed to know. It's not often that
the problem is not at my end.
I think I'll ask RunRev to see if they can do something.
I'm not concerned about the refresh in fields. That's not something I
need. (I put it to the list only as a very simple example of the
refresh problem.) But there is a real problem with the graphics
I was trying to update the web site (jamesphurley.com) for my book on
which I have OS 9 and Windows applications which illustrate a few
issue discussed in the book. I wanted to include an OS X standalone.
One example that illustrates how the responsiveness of RR has
deteriorated in OS X can be seen from the application demonstrating
the nature of temperature.
In the message box: go url
In OS 9, as one moves the small red and blue buttons on the energy
axis, the motions is smooth and the mouse stays with the buttons. In
OS X the responsive is sluggish and the buttons quickly lag behind
the mouse. I will have to see if I can't improve the code.
I am running a G4 PB; I can't imagine what this looks like on slower machines.
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