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Re: CGrafPtr or GrafPtr?
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Re: CGrafPtr or GrafPtr?

In article <email@hidden>,
"George Birbilis" <email@hidden> wrote:

> > These are interchangable. GrafPtr comes from the old days when the Mac
> > has no color ports, obviously CGrafPtr is the color version. These days
> > you can freely cast from one to the other. At least on Windows although
> > I am pretty sure this is the case on the Mac.

They are "sort of" interchangable. If you are getting back a GrafPtr
from an API, and the port in question really is color, then yes -- they
are castable.

If the port really is b/w, you'll get some bad-looking color lookups if
you attempt to use QuickDraw for drawing full-color data (the colors
will all be threasholded to the classic 7 colors).

I'll also add that we recommend that applications using QuickTime create
color windows/ports/dialogs. While a black and white port/window/dialog
will still allow QuickTime movies to play back within it -- the code to
do so is non-optimal.

Since this is as simple as either making the proper call (ie, NewCWindow
rather than NewWindow) or placing the appropriate resource next to your
window/dialog template, there isn't a good reason not to do so.
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References: 
 >CGrafPtr or GrafPtr? (From: "George Birbilis" <email@hidden>)
 >Re: CGrafPtr or GrafPtr? (From: email@hidden (Chris Large))



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