Hi, thank you very much for the idea! I'll try that! Paul Date: Fri, 4 Feb 2011 21:07:10 -0800 Subject: Re: NSBitmapImageRep with floating point values From: kenfe...@gmail.com To: david.dun...@apple.com CC: elbomber...@hotmail.com; cocoa-dev@lists.apple.com
On Thu, Feb 3, 2011 at 2:37 PM, David Duncan <david.dun...@apple.com> wrote: On Feb 3, 2011, at 1:32 PM, Paul Morel wrote: > in my application I would need to save an image where pixel intensities are > floating point values. Apparently TIFF can support that.But I don't know I > can do that in Objective-C. I saw that there is a bitmap format > "NSFloatingPointSamplesBitmapFormat" that can be used. Does anybody knows how > to use it? I tried to use a (float **) instead of (unsigned char **) but it > doesn't work of course, because it is supposed to receive (unsigned char **)! Did you try just allocating an appropriately sized buffer and typecasting to (unsigned char **)? The type cast doesn't change the data, just the compiler's interpretation of it (and since this is a pointer that won't affect the data itself in anyway). Yes, unsigned char here really is just intended to signify "raw data" - a byte stream. The byte stream may be interpreted as floating point data channels. -Ken -- David Duncan _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/kenferry%40gmail.com This email sent to kenfe...@gmail.com _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
