> On Feb 6, 2015, at 18:23, Nick <eveningn...@gmail.com> wrote: > > Hello, > I am playing with the CIMicroPaint sample code ( > https://developer.apple.com/library/mac/samplecode/CIMicroPaint). This is > basically a simple paint editor (you can draw on a view with a mouse using > CoreImage). > > I would like to save whatever is drawn into a file. So what I do is call > this, when the save button is pressed: > > -(IBAction)saveButton:(id)sender { > > NSBitmapImageRep *bir = [[NSBitmapImageRep alloc] initWithCIImage:self. > imageAccumulator.image]; > > NSData *bmpData = [bir representationUsingType:NSBMPFileType properties: > nil]; //THIS LINE CORRUPTS THE CIImageAccumulator.image. WHY?
This is a guess because I have never used this class, but it sounds like a caching problem. I don't know if CIImage and the accumulator are prone to similar caching problems like NSImage had (regarding -cacheMode and NSImageCacheNever and -setDataRetained:YES). If you copy the CIImage data from the accumulator and initialize your image rep with the copy, does the problem go away? > > [bmpData writeToFile:[@"~/test.bmp" stringByExpandingTildeInPath] > atomically:YES]; > > //NSImage *img = [[NSImage alloc] initWithData:bmpData]; > > //imageView.image = img; > > } > > This is the only code i added to the original Apple sample code. > The problem i have is that i can call representationUsingType only once to > get the bmpData that i can save to disk as an image. > If i draw something, and call it again later, i will get the old image, > not the updated one. Also the commented imageView code shows the same > problem - the NSImageView gets updated only the first time, not the > subsequent times. > > What can be the cause of this? > It really looks like a bug in Apple framework code. Or is it me doing > something wrong? Sandor _______________________________________________ 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
