Research
This page contains a list of user images about Apple Icon Image Format which are relevant to the point and besides images, you can also use the tabs in the bottom to browse Apple Icon Image Format news, videos, wiki information, tweets, documents and weblinks.
Red vs. Blue S8 Tex fights Reds and Blues in awesome action sequenceGo to RoosterTeeth.com for all of season 8 of RvB!
MACKLEMORE X RYAN LEWIS - OTHERSIDE REMIX FEAT. FENCES [MUSIC VIDEO]The Otherside Remix Music Video was filmed in various locations for about a year and a half throughout 2010-2011. It is the duo's second video collaboration ...
P!nk - Try (The Truth About Love - Live From Los Angeles)Music video by P!nk performing Try (The Truth About Love - Live From Los Angeles). (C) 2012 RCA Records, a division of Sony Music Entertainment.
MACKLEMORE & RYAN LEWIS - CAN'T HOLD US FEAT. RAY DALTON (OFFICIAL MUSIC VIDEO)Macklemore & Ryan Lewis present the official music video for Can't Hold Us feat. Ray Dalton. Can't Hold Us on iTunes: https://itunes.apple.com/us/album/cant-...
Draw My Life- Jenna MarblesThis video accidentally turned out kind of sad, ME SO SOWWY IT NOT POSED TO BE SAD WHO WANTS HUGS AND COOKIES? Also, FYI for anyone attempting this, it takes...
Steve Jobs vs Bill Gates. Epic Rap Battles of History Season 2.Download This Song: http://bit.ly/KzLBGB Click to Tweet this Vid-ee-oh! http://bit.ly/Nt9lg8 Hi. My name is Nice Peter, and this is EpicLLOYD, and this is th...
Draw My Life - Ryan HigaSo i was pretty hesitant to make this video... but after all of your request, here is my Draw My Life video! Check out my 2nd Channel for more vlogs: http://...
Key & Peele: Substitute TeacherA substitute teacher from the inner city refuses to be messed with while taking attendance.
Harrison Ford Won't Answer Star Wars QuestionsSee Harrison Ford in 42! Go to http://42movie.warnerbros.com/ Jimmy Kimmel Live - Harrison Ford Won't Answer Star Wars Questions Jimmy Kimmel Live's YouTube ...
Rihanna - Where Have You BeenBuy on iTunes: http://www.Smarturl.it/TTT Amazon: http://idj.to/svJVGM Music video by Rihanna performing Where Have You Been. ©: The Island Def Jam Music Group.
 |
|
| Filename extension | .icns |
|---|---|
| Type code | icns |
| Uniform Type Identifier | com.apple.icns |
| Developed by | Apple Inc. |
| Type of format | icon file format |
The Apple Icon Image format is the icon format used in Apple Inc.'s Mac OS X. It supports icons of 16×16, 32×32, 48×48, 128×128, 256×256, 512×512, and 1024×1024 pixels, with both 1- and 8-bit alpha 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.
Contents |
File structure [edit]
The file format consists of an 8 byte header, followed by any number of icons.
Header [edit]
| Offset | Size | Purpose |
|---|---|---|
| 0 | 4 | Magic literal, must be "icns" (0x69, 0x63, 0x6e, 0x73) |
| 4 | 4 | Length of file, in bytes, msb first |
Icon data [edit]
| Offset | Size | Purpose |
|---|---|---|
| 0 | 4 | Icon type, see OSType below. |
| 4 | 4 | Length of data, in bytes (including type and length), msb first |
| 8 | Variable | Icon data |
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") pixel data is often compressed (per channel) with a format similar to PackBits.[1]
Some sources mentioned that the OS supports both compressed or uncompressed data chunks.
Icon types [edit]
| OSType | Length (bytes) | Size (pixels) | Supported OS Version | Description |
|---|---|---|---|---|
| ICON | 128 | 32 | 1.0 | 32×32 1-bit mono icon |
| ICN# | 256 | 32 | 6.0 | 32×32 1-bit mono icon with 1-bit mask |
| icm# | 48 | 16 | 6.0 | 16×12 1 bit mono icon with 1-bit mask |
| icm4 | 96 | 16 | 7.0 | 16×12 4 bit icon |
| icm8 | 192 | 16 | 7.0 | 16×12 8 bit icon |
| ics# | 64 (32 img + 32 mask) | 16 | 6.0 | 16×16 1-bit mask |
| ics4 | 128 | 16 | 7.0 | 16×16 4-bit icon |
| ics8 | 256 | 16 | 7.0 | 16x16 8 bit icon |
| is32 | varies (768) | 16 | 8.5 | 16×16 24-bit icon |
| s8mk | 256 | 16 | 8.5 | 16x16 8-bit mask |
| icl4 | 512 | 32 | 7.0 | 32×32 4-bit icon |
| icl8 | 1,024 | 32 | 7.0 | 32×32 8-bit icon |
| il32 | varies (3,072) | 32 | 8.5 | 32x32 24-bit icon |
| l8mk | 1,024 | 32 | 8.5 | 32×32 8-bit mask |
| ich# | 288 | 48 | 8.5 | 48×48 1-bit mask |
| ich4 | 1,152 | 48 | 8.5 | 48×48 4-bit icon |
| ich8 | 2,304 | 48 | 8.5 | 48×48 8-bit icon |
| ih32 | varies (6,912) | 48 | 8.5 | 48×48 24-bit icon |
| h8mk | 2,304 | 48 | 8.5 | 48×48 8-bit mask |
| it32 | varies (49,152) | 128 | 10.0 | 128×128 24-bit icon |
| t8mk | 16,384 | 128 | 10.0 | 128×128 8-bit mask |
| ipc4 | varies | 16 | 10.7 | 16x16 icon in JPEG 2000 or PNG format |
| ipc5 | varies | 32 | 10.7 | 32x32 icon in JPEG 2000 or PNG format |
| ic07 | varies | 128 | 10.7 | 128x128 icon in JPEG 2000 or PNG format |
| ic08 | varies | 256 | 10.5 | 256×256 icon in JPEG 2000 or PNG format |
| ic09 | varies | 512 | 10.5 | 512×512 icon in JPEG 2000 or PNG format |
| ic10 | varies | 1024 | 10.7 | 1024×1024 in 10.7 (or 512x512@2x "retina" in 10.8) icon in JPEG 2000 or PNG format |
| ic11 | varies | 32 | 10.8 | 16x16@2x "retina" icon in JPEG 2000 or PNG format |
| ic12 | varies | 64 | 10.8 | 32x32@2x "retina" icon in JPEG 2000 or PNG format |
| ic13 | varies | 256 | 10.8 | 128x128@2x "retina" icon in JPEG 2000 or PNG format |
| ic14 | varies | 512 | 10.8 | 256x256@2x "retina" icon in JPEG 2000 or PNG format |
- the values inside the brackets () in the length column is the uncompressed length.
Other types [edit]
| OSType | Length (bytes) | Description |
|---|---|---|
| 'TOC ' | varies | "Table of Contents" a list of all image types in the file, and their sizes (added in Mac OS X 10.7) |
| 'icnV' | 4 | 4-byte big endian float - equal to the bundle version number of Icon Composer.app that created to icon |
See also [edit]
- Icon Composer
- icns Browser
- libicns - Open-source C library for woking with icns format files
- Computer icon
- The Iconfactory
- IconBuilder
- Wikipedia:Icons
- PackBits
- compare: ICO (icon image file format)
References [edit]
External links [edit]
|
||||||||||||||||||||
 |
This Apple-related article is a stub. You can help Wikipedia by expanding it. |
Twitter
News
Documents
Weblinks