*** Sorry for the double post *** Am 18.06.2009 um 20:43 schrieb Stefan:
Hi, i have some trouble with some Core funtions and are out of ideas (after a whole day of searching, debugging and docs-reading) The problem could be simple described: I have 2 CGImageRef 'objects' which i have to compare. That is working fine with the CFEqual function. But i also need a valid (valid per contract) HashCode too. The problem is now that these hashcodes are _always_ 0 To make this more visual i have appended a little code snipped below. Because i really have any further ideas i need some help with this. Much thanks in advance. Stefan /* SNIP */ (Yes, CoreFoundation.h is included) CGImageRef imageRefOne; CGImageRef imageRefTwo; /.../ CGDataProviderRef dprov = CGImageGetDataProvider( imageRefOne ); CFDataRef imageRefOneDataRef = CGDataProviderCopyData( dprov ); /*imageRefOneDataRef and the 2 CGImageRef's are ok, checked in XCode debugger.could be copied into an NSBitmapImageRep object and looks as expected */ CFHashCode hcOne = CFHash(imageRefOneDataRef); /* Returns ALWAYS 0 */BOOL isEqual = CFEqual(imageRefOne, imageRefTwo); /* Works ALWAYS as expected: if images are equal it returns equal. if not: not*//* SNIP */_______________________________________________ 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/stefan%40wammel.com This email sent to ste...@wammel.com
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