Thank you. I would have never found that. But what does “enabled” do? Or, more precisely, what does “not enabled” do? If a filter is not enabled, does that mean it is transparent and simply passes input to output? I can’t believe something so simple in concept as a freeze filter is so difficult to implement. CIFilters are black magic. They just don’t seem to follow the usual expectations of software constructs.
I did get my highlighting filter to work, using color blend and/or a GaussianBlur embedded filter for the background, with controllable parameters. The user can even live-draw and edit the clear areas of the filter (used as a transient layer in a presentation layer stack). It provides a very nice effect for drawing attention to specific areas. On 2/27/14 9:42 AM, "Kevin Meaney" <[email protected]> wrote: > First a note. The name property is declared as a CACIFilterAdditions in > CACIFilterAdditions.h. > > I think you will need to draw the CIImage to your CIContext and then generate > a CGImage to capture its state for future reference and then generate a new > CIImage from the CGImage. I believe the CIImage that is the output of a filter > is more a recipe about how to generate an image and not a bitmap > representation of the image which I think is where your problem lies. > > Kevin > > Sent from my iPhone > > On 24 Feb 2014, at 17:28, Gordon Apple <[email protected]> wrote: > >> > Apparently, my comment about not understanding this construct for >> > setValueForKeyPath was correct. It actually works. I finally got the >> > highlighting filter to work and update properly. Now I¹m trying to do >> > something much simpler, i.e., construct a freezeFilter. Nothing I¹ve tried >> > so far works. Apparently, a CIFilter is expected to be stateless function >> > such as outputImage = f(inputImage, parameters). Not accepting this >> premiss, >> > I decided to try caching the first output image ( from the outputImage >> > method), then return the cashed image thereafter, an ultra simple concept, >> > except that it does not work. Any reason, besides what I postulated, why >> > this shouldn¹t work? >> > >> > _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
