Many of the Filters Including EightBit, CRT, Bayer Dither, Lens Flare, Lens Correction etc. based on CIKernel are crashing due to new changes.

ERROR: parameter has unexpected type 'vec4' (should be a sampler type) vec2 uv = samplerCoord(image);

This seems to be a common error message among most crashing filters. please check.

I don't want to presume that choosing GPL was not intentional, but are you aware that it does not allow for commercial use (distribution) unless the app you're using it in is also open-source (ref: http://softwareengineering.stackexchange.com/questions/47032/can-i-use-gpl-software-in-a-commercial-application)? Is there any chance you'd be willing to license it under something more permissive like MIT or BSD?

This code should be merged to a new branch named swift-3. @FlexMonkey Please create a new branch and I will create the PR again.

This should not be merged in master as of now, since Xcode 8 is still in beta mode.

You've added so many great filters that I sometimes struggle to find a specific one. (Take that as a compliment!)

Would you be interested in adding a search function to the filter list? I've been considering making a pull request, but wanted to check that you'd be interested in merging it, and that you're not already working on it.

I wanted to make some changes and noticed there wasn't a gitignore, so I've added one to make contributing easier.

I also moved coffeecup.jpg into the assets folder and renamed the asssets Xcode group to assets. Nothing major! I've tested the coffeecup.jpg move and it doesn't seem to have affected anything.

Thank you for the great project!

For us folks without iPads, it would be great to use filterpedia in the simulator. Looks like this is related to MetalKit not being supported in the simulator.

http://stackoverflow.com/questions/24086194/how-do-you-import-metal-in-swift

I bring this up because it may deter some people from buying your book, and I want you to sell a lot of copies of your book :-)

Bug: (Incorrect mod used) Affected 2x2, 3x3 and 8x8 (only 4x4 work as expected)

Enhancements: (Color Palettes extended)

• Black 0x00 and white 0xFF using only the red component.
• Commodore 64
• Vic-20
• Apple II
• ZX Spectrum Bright
• ZX Spectrum Dim
• RGB

Running in iPad Air 2 iOS 9.3 simulator in Xcode 7.3 on OS X 10.11.4:

2016-04-13 20:25:17.738 Filterpedia[5960:487581] __64+[CIFilter(CIFilterRegistryPrivate) filterWithName:setDefaults:]_block_invoke520 [constructor filterWithName:AdvancedMonochrome] returned an object of class Filterpedia.AdvancedMonochrome.

Looks like CIFilter doesn't like modules in this instance. I had a quick look around the code but couldn't figure out why.

I am implementing feature with red, orange, yellow, green, aqua, blue, purple color selection and one UISlider. I am not understanding how to use MultiBandHSV with UISlider properly.

Thank you.

bumped swift syntax to swift 5 fixed a case where the demo would crash if a filter was unwrapped unsafely resolved swift warnings pertaining to memory safety.

more info on why the issue resolution was important

• update swift syntax from swift 2 to swift 4.2
• adds support for iPhone (landscape orientation only)
• fix some GLSL and metal relation crashes
• update .gitignore and remove .xcuserstated from the repo

Most of the edits were actually pulled from another fork I picked at random that fixed the swift 3 build issues.

However, I noticed that a lot of filters has horrible slider ranges and default values (I believe as a result of the swift 3 conversion), so I found the issue and cast the filter values as NSNumbers and then used the "floatValue" of an NSNumber to get those min, max, and default values, instead of casting NSNumbers as Float.

Any chance of publishing this for Mac OS too?

I'd LOVE to help - but I'm struggling myself with applying CIFilters onto live camera input on Mac OS, and I seem to miss some of the basics there.

Otherwise - I'm very experienced in Application design and development. Please let me know if you're interested.

In my tests, your MetalKuwaharaFilter is actually 50% slower then KuwaharaFilter however here Simon mentions Metal is supposed to be 50% faster.

Any idea why it is like that?