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
