From Seo Wiki - Search Engine Optimization and Programming Languages
- Its introduction provides insufficient context for those unfamiliar with the subject. Tagged since February 2009.
- It may require general cleanup to meet Wikipedia's quality standards. Tagged since January 2009.
- It is incomplete and may require expansion or cleanup. Tagged since February 2009.
The following tables compare graphics compatibility and support for a number of layout engines. Please see the individual products' articles for further information. This article is not all-inclusive or necessarily up-to-date. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.
Version numbers, if possible, are provided for features that are fully supported. Proprietary extensions are not included.
Explanation of the tables
Rather than the names of web browsers, the names of the underlying engines are used. The browsers that use the various engines are listed below.
Values indicate the level of support in the most recent version of the layout engine, or (if a version number is given) in the specified version. Version numbers without any other value indicate the version at which the layout engine first fully supported the feature.
|| Indicates that the layout engine fully supports this property/element when valid values are used.
|| Indicates that the property/element is completely ignored.
|| Indicates that the property/element is understood, but that not all values are supported. Supported values are implemented correctly.
|| Indicates that the property/element is understood, but that it is not implemented correctly in all cases.
|| Indicates that the property/element is understood, but supported under an alternate name. May be incomplete or buggy.
|| Indicates that the property/element is no longer supported.
|| Indicates that the property/element is supported to some extent in an experimental/nightly build. Future support is expected.
Image format support
KHTML general overview notes
- KHTML — Does not have any native image support. This is by design: in Konqueror, multimedia files are handled by KParts.
Gecko general overview notes
- Gecko — uses the libpr0n-library to render images.
Prince TIFF overview notes
- Prince — uses the libtiff-library to load TIFF images.
Comparison of various JPEG/JFIF feature support.
Trident JPEG support notes
- Progressive — The Trident layout engine only displays the image once it has been completely downloaded.
Prince JPEG support notes
- Prince uses libjpeg-library from the Independent JPEG Group to load JPEG pictures
Comparison of various GIF feature support.
Prince Gif support notes
- Prince uses the libungif-library to load Gif images
Comparison of various PNG feature support.
General PNG support notes
- Color mode — There are 15 combinations of the color modes in PNG. Not all modes are available in every image tool though.
- Gamma correction — Gecko and Presto currently support gamma correction for all color profiles except for ICC-profile.
Trident PNG support notes
- Interlacing — Interlaced PNG is displayed progressively, but in 1D instead of 2D.
WebKit PNG support notes
- Gamma correction — It is incorrectly applied to unlabeled PNGs.
Prince PNG support notes
- Prince uses libpng-library to load PNG pictures.
- ↑ Roelofs, Greg. "Browser Gamma-Consistency Test". http://www.libpng.org/pub/png/colorcube/.
- ↑ Sivonen, Henri. "The Sad Story of PNG Gamma “Correction”". http://hsivonen.iki.fi/png-gamma/.