On Aug 16, 2017, at 6:29 PM, Sean McBride <s...@rogue-research.com> wrote: > > > Right, but then I'm back where I started. :( Because there's (apparently) no > way to ensure that the NSBitmapImageRep I get is in a particular format, and > I absolutely need 8 bit per pixel & greyscale.
It's quite old now, but the 10.6 AppKit release notes had a lot of good information about working with images in Cocoa viz. Core Graphics. From <https://developer.apple.com/library/content/releasenotes/AppKit/RN-AppKitOlderNotes/#X10_6Notes>, search for "NSImage, CGImage, and CoreGraphics impedance matching" and read from there. They also have advice about what you're trying to do. The advice is to *not* try to interpret an arbitrary image rep's bitmap data. It's to make a bitmap with the format you desired and draw the source image into it. Then, you have bitmap data in the format you want, for sure. For that, search for "NSBitmapImageRep: CoreGraphics impedance matching and performance notes". Regards, Ken _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
