The Apple Icon Image format is the icon format used in Apple Inc.'s macOS. It supports icons of 16 × 16, 32 × 32, 48 × 48, 128 × 128, 256 × 256, 512 × 512 points at 1x and 2x scale, with both 1- and 8-bitalpha channels and multiple image states (example: open and closed folders). The fixed-size icons can be scaled by the operating system and displayed at any intermediate size.
Apple Icon
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File structure[edit]
The file format consists of an 8 byte header, followed by any number of icons.
Header[edit]
Icon data[edit]
Compression[edit]
Over time the format has been improved and there is support for compression of some parts of the pixel data. The 32-bit ('is32', 'il32', 'ih32','it32') and ARGB ('ic04', 'ic05') pixel data are often compressed (per channel) with a format similar to PackBits.[1]Some sources mentioned that the OS supports both compressed or uncompressed data chunks.
The following pseudocode decompresses the data:
Free Icons
Example:
02 01 02 02 80 03 81 04 82 05 should decompress to 01 02 02 03 03 03 04 04 04 04 05 05 05 05 05
Icon types[edit]
Ios App IconOther types[edit]
Support[edit]![]()
Various image viewers can load *.icns files, and free and open source converters from or to PNG also exist.[2][3]GTK+ can load *.icns resources since 2007.[4] Other tools supporting the format include the Apple Icon Composer and icns Browser, The Iconfactory, and IconBuilder.
MacOS[clarification needed] offers the built-in iconutil command line tool to pack and unpack *.icns https://vmqzlr.weebly.com/blog/best-macos-to-do-app. files. Spotify app finder mac.
External links[edit]
See also[edit]
App Store Icns Mac OsReferences[edit]
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Apple_Icon_Image_format&oldid=976274378'
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