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GIF: Difference between revisions
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(→Test images: imagetestsuite archive URL) |
(→Specifications: Add MathType; enumerate fractint application authentication codes) |
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* GIF87a: [http://web.archive.org/web/20100929230301/http://www.etsimo.uniovi.es/gifanim/gif87a.txt Text] (Stanford) / [http://www.w3.org/Graphics/GIF/spec-gif87.txt Text] (W3C) | * GIF87a: [http://web.archive.org/web/20100929230301/http://www.etsimo.uniovi.es/gifanim/gif87a.txt Text] (Stanford) / [http://www.w3.org/Graphics/GIF/spec-gif87.txt Text] (W3C) | ||
* GIF89a: [http://www.w3.org/Graphics/GIF/spec-gif89a.txt Text] / [http://odur.let.rug.nl/~kleiweg/gif/GIF89a.html HTML] | * GIF89a: [http://www.w3.org/Graphics/GIF/spec-gif89a.txt Text] / [https://web.archive.org/web/20070715193723/http://odur.let.rug.nl/~kleiweg/gif/GIF89a.html HTML] | ||
* GIF Application Extensions: | * GIF Application Extensions: | ||
** <code>NETSCAPE</code> <code>2.0</code> | ** <code>NETSCAPE</code> <code>2.0</code> | ||
*** [http://odur.let.rug.nl/~kleiweg/gif/netscape.html GIF Application Extension: NETSCAPE2.0] | *** [https://web.archive.org/web/20140830100320/http://odur.let.rug.nl/~kleiweg/gif/netscape.html GIF Application Extension: NETSCAPE2.0] | ||
*** [http://www.vurdalakov.net/misc/gif/netscape-looping-application-extension Netscape Looping Application Extension] | *** [http://www.vurdalakov.net/misc/gif/netscape-looping-application-extension Netscape Looping Application Extension] | ||
*** [http://www.vurdalakov.net/misc/gif/netscape-buffering-application-extension Netscape Buffering Application Extension] | *** [http://www.vurdalakov.net/misc/gif/netscape-buffering-application-extension Netscape Buffering Application Extension] | ||
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*** [http://www.color.org/icc1V42.pdf Specification ICC.1:2004-10 (Profile version 4.2.0.0) – Image technology colour management: Architecture, profile format, and data structure] (section B.6) | *** [http://www.color.org/icc1V42.pdf Specification ICC.1:2004-10 (Profile version 4.2.0.0) – Image technology colour management: Architecture, profile format, and data structure] (section B.6) | ||
** <code>XMP Data</code> <code>XMP</code> | ** <code>XMP Data</code> <code>XMP</code> | ||
*** [http://wwwimages.adobe.com/www.adobe.com/content/dam/ | *** [http://wwwimages.adobe.com/www.adobe.com/content/dam/acom/en/devnet/xmp/pdfs/XMP%20SDK%20Release%20cc-2014-12/XMPSpecificationPart3.pdf XMP Specification, Part 3: Storage in Files] (section 1.1.2) | ||
** <code>fractint</code> | ** <code>fractint</code> <code>001</code> / <code>fractint</code> <code>002</code> / <code>fractint</code> <code>003</code> / <code>fractint</code> <code>004</code> / <code>fractint</code> <code>005</code> / <code>fractint</code> <code>006</code> / <code>fractint</code> <code>007</code> | ||
*** [http://fractint.net/fractsvn/trunk/fractint/common/encoder.c fractint encoder source code] | *** [http://fractint.net/fractsvn/trunk/fractint/common/encoder.c fractint encoder source code] | ||
*** [http://fractint.net/fractsvn/trunk/fractint/common/loadfile.c fractint decoder source code], with notes and backwards compatibility for older versions of the fractint extension blocks. All of their extension blocks have names of the form <code>fractint<var>nnn</var></code>, where <code><var>nnn</var></code> is a 3 digit block number. | |||
** <code>MathType</code> <code>001</code> / <code>MathType</code> <code>002</code> / <code>MathType</code> <code>003</code> | |||
*** [http://www.inr.ac.ru/~blackbox/MathType/SDK/docs/baseline_gif.htm MathType baseline information] | |||
*** [http://www.dessci.com/en/support/mathtype/tsn/tsn147.htm MathType: GIFs do not retain their DPI properties] - descriptions and sample images could be used to reverse engineer format | |||
=== Further details === | === Further details === | ||
* [[Wikipedia: | * [[Wikipedia:GIF]] | ||
* [http://fileformats.archiveteam.org/wiki/GIF GIF File Format] | * [http://fileformats.archiveteam.org/wiki/GIF GIF File Format] | ||
* [http://www.matthewflickinger.com/lab/whatsinagif/ What's in a GIF] | * [http://www.matthewflickinger.com/lab/whatsinagif/ What's in a GIF] | ||
* [http://commandlinefanatic.com/cgi-bin/showarticle.cgi?article=art011 Command Line Fanatic: Inside the GIF file format] | |||
* [http://www.theimage.com/animation/toc/toc.html Gifology: Understanding GIF Files & GIF Animation] | * [http://www.theimage.com/animation/toc/toc.html Gifology: Understanding GIF Files & GIF Animation] | ||
* [http://web.archive.org/web/20100929231133/http://www.etsimo.uniovi.es/gifanim/gifabout.htm All About GIF89a] | * [http://web.archive.org/web/20100929231133/http://www.etsimo.uniovi.es/gifanim/gifabout.htm All About GIF89a] | ||
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* ImageTestSuite | * ImageTestSuite | ||
** [ | ** [https://github.com/Wormnest/imagetestsuite/blob/wiki/GIFTestSuite.md Documentation] | ||
** [ | ** [https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/imagetestsuite/imagetestsuite-gif-1.00.tar.gz Images (Archive)] | ||
** [ | ** [https://github.com/Wormnest/imagetestsuite/tree/master/gif Images (git)] | ||
[[Category:Spec coordination]] | |||
Latest revision as of 20:04, 20 November 2017
Animated GIFs need a spec that, in particular, specifies how to handle timings (not all browsers honor all values, so we should specify what needs to be honored exactly)
Implementations
Gecko
- http://mxr.mozilla.org/mozilla-central/source/image/decoders/nsGIFDecoder2.h
- http://mxr.mozilla.org/mozilla-central/source/image/decoders/GIF2.h
- http://mxr.mozilla.org/mozilla-central/source/image/decoders/nsGIFDecoder2.cpp
WebKit
- http://trac.webkit.org/browser/trunk/Source/WebCore/platform/image-decoders/gif/GIFImageDecoder.h
- http://trac.webkit.org/browser/trunk/Source/WebCore/platform/image-decoders/gif/GIFImageReader.h
- http://trac.webkit.org/browser/trunk/Source/WebCore/platform/image-decoders/gif/GIFImageDecoder.cpp
- http://trac.webkit.org/browser/trunk/Source/WebCore/platform/image-decoders/gif/GIFImageReader.cpp
- http://trac.webkit.org/browser/trunk/Source/WebCore/platform/image-decoders/ImageDecoder.cpp
Blink
- https://chromium.googlesource.com/chromium/blink/+/master/Source/core/platform/image-decoders/gif/GIFImageDecoder.h
- https://chromium.googlesource.com/chromium/blink/+/master/Source/core/platform/image-decoders/gif/GIFImageReader.h
- https://chromium.googlesource.com/chromium/blink/+/master/Source/core/platform/image-decoders/gif/GIFImageDecoder.cpp
- https://chromium.googlesource.com/chromium/blink/+/master/Source/core/platform/image-decoders/gif/GIFImageReader.cpp
- https://chromium.googlesource.com/chromium/blink/+/master/Source/core/platform/image-decoders/ImageDecoder.cpp
Other
- http://sourceforge.net/p/giflib/code/ci/master/tree/ (giflib)
- https://github.com/jnordberg/gif.js (gif.js)
- https://github.com/deanm/omggif (omggif)
- https://github.com/avik-das/giferly (giferly)
- http://code.google.com/p/gifdotnet/source/browse/ (gifdotnet)
References
Specifications
- GIF87a: Text (Stanford) / Text (W3C)
- GIF89a: Text / HTML
- GIF Application Extensions:
NETSCAPE2.0ANIMEXTS1.0ICCRGBG1012XMP DataXMP- XMP Specification, Part 3: Storage in Files (section 1.1.2)
fractint001/fractint002/fractint003/fractint004/fractint005/fractint006/fractint007- fractint encoder source code
- fractint decoder source code, with notes and backwards compatibility for older versions of the fractint extension blocks. All of their extension blocks have names of the form
fractintnnn, wherennnis a 3 digit block number.
MathType001/MathType002/MathType003- MathType baseline information
- MathType: GIFs do not retain their DPI properties - descriptions and sample images could be used to reverse engineer format
Further details
- Wikipedia:GIF
- GIF File Format
- What's in a GIF
- Command Line Fanatic: Inside the GIF file format
- Gifology: Understanding GIF Files & GIF Animation
- All About GIF89a
Test images
- ImageTestSuite