On Feb 23, 2014, at 1:06 PM, Gordon Apple <g...@ed4u.com> wrote: > We have run into a number is issues trying to use CIFilters with CALayers: > > 1. When a layer is hidden, its filters, especially background filters, > should be temporarily removed, or at least bypassed. Hiding the layer > should make if effectively non-existent in the displayed layer stack.
Is this a statement or a question? > 2. The docs should tell you that in a CIFilter you cannot auto-synthesize > filter input parameters. This simply does not work, especially for > inputImage. Bug? > 3. The docs for CALayer filters and background filters say you should name > your filters for use in changing parameters. I.e., filter.name = > @²myFilter². Amazingly, this works, in spite of the fact that there is no > public property called ³name² for a CIFilter. There is a public property, but it isn’t declare in CIFilter.h if I recall correctly. > 4. The example keyPath makes no sense whatsoever, unless we just don¹t > understand keyPaths: > > [layer setValue:XXX forKeyPath:@²backgroundFilters.myFilter.filterParam²]; > > backgroundFilters is an array of filters. myFilter is a property value of > some element of the array. (huh?) Core Animation extension to KVC. > 5. We need some decent documentation of what in GL Shading Language is > actually relevant to writing ciKernels, besides the one page addendum > provided. Bug (I don’t know myself, but a bug is the only way you are going to tell the folks in charge of that it is needed). > 6. And, of course, the problem we have already mentioned in a previous post > about getting a CALayer to update when a filter parameter is changed. You have to go through the key-value path in Core Animation. If you update the CIFilter directly you have no guarantee that CA will notice the change. -- 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
