NationMaster - Encyclopedia: Comparison of layout engines (graphics)

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. Computer graphics (CG) is the field of visual computing, where one utilizes computers both to generate visual images synthetically and to integrate or alter visual and spatial information sampled from the real world. ... A layout engine, or rendering engine, is a software that takes web content (such as HTML, XML, image files, etc) and formatting information (such as CSS, XSL, etc) and displays the formatted content on the screen. ...

Version number, if possible, is provided for feature that is fully supported. Proprietary extensions are not included.

1 General overview
2 JPEG support
- 2.1 Trident JPEG support notes
3 GIF support
4 PNG support
5 SVG 1.1 support
6 References
7 See also
8 External links

General overview

A general overview of the graphics support.

		Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab
JPEG/JFIF		3.0	0	1.0	Yes	Yes	7.0	Yes
GIF	GIF 89a	3.0	0	1.0	Yes	Yes	7.0	Yes
GIF	GIF 87a	3.0	0	1.0	Yes	Yes	7.0	Yes
PNG	1.2 (W3C/ISO/IEC version)	Partial	0	1.0	Yes	Yes	7.0	Yes
	1.1	Partial	0	1.0	Yes	Yes	7.0	Yes
	1.0	Partial	0	1.0	Yes	Yes	7.0	Yes
MNG	1.0	No	No	Dropped [1]	?	No	?	?
JNG	1.0	No	No	Dropped [2]	?	No	?	?
APNG	0.4	No	No	No [3]	?	No	?	?
SVG	1.1	No	No	Partial	No	Yes	No	No
	1.1 Basic (SVGB)	No	No	Partial	No	Yes	Partial	No
	1.1 Tiny (SVGT)	No	No	Partial	No	Yes	8.0	No
		Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab

Trident (also known as MSHTML) is the name of the layout engine for the Microsoft Windows version of Internet Explorer. ... Tasman is the name of the layout engine introduced with version 5 of Internet Explorer for Mac. ... Gecko is the open source web browser layout engine used in all Mozilla-branded software and its derivatives, including later Netscape releases. ... WebCore is a framework developed by Apple, and licensed under the LGPL, to provide an HTML layout engine for Mac OS X. It is one half of the WebKit framework (the other being JavaScriptCore). ... Konqueror using KHTML to render the Wikipedia front page. ... Presto is the name of the current layout engine for the Opera web browser developed by Opera Software. ... iCab is a highly-configurable web browser for the Macintosh by iCab Company. ... A photo of a flower compressed with successively lossier compression ratios from left to right. ... A rotating globe in GIF format. ... A PNG image with an 8-bit transparency layer (top), overlayed onto a chequered background (bottom). ... The World Wide Web Consortium (W3C) is an international consortium where member organizations, a full-time staff, and the public, work together to develop standards for the World Wide Web. ... Logo of the International Organization for Standardization The International Organization for Standardization (ISO) is an international standard-setting body composed of representatives from national standards bodies. ... The International Electrotechnical Commission (IEC) is an international standards organization dealing with electrical, electronic and related technologies. ... MNG (pronounced in IPA) is a public file format for animated images. ... JNG (pronounced jing) is a JPEG-based graphics file format, closely related to PNG. The name stands for JPEG Network Graphics. ... The APNG (Animated Portable Network Graphics) file format is a proposed extension to the portable network graphics (PNG) specification that would allow for animated PNG files that work in a similar fashion to animated graphics interchange format (GIF) files, while retaining the backward compatibility with non-animated PNG files. ... Static image generated from an SVG example. ... Trident (also known as MSHTML) is the name of the layout engine for the Microsoft Windows version of Internet Explorer. ... Tasman is the name of the layout engine introduced with version 5 of Internet Explorer for Mac. ... Gecko is the open source web browser layout engine used in all Mozilla-branded software and its derivatives, including later Netscape releases. ... WebCore is a framework developed by Apple, and licensed under the LGPL, to provide an HTML layout engine for Mac OS X. It is one half of the WebKit framework (the other being JavaScriptCore). ... Konqueror using KHTML to render the Wikipedia front page. ... Presto is the name of the current layout engine for the Opera web browser developed by Opera Software. ... iCab is a highly-configurable web browser for the Macintosh by iCab Company. ...

Gecko general overview notes

SVG — Firefox 1.5 partially supports SVG 1.1. Modules that are supported, in progress, or not supported [4].

KHTML general overview notes

KHTML — Does not have any native image support. This is by design. In Konqueror, multimedia files are handled by KParts. The KDE project also developed a SVG plugin for Konqueror, known as KSVG [5].

Konqueror is a file manager, web browser and file viewer, developed as part of the K Desktop Environment (KDE) by volunteers and runs on most Unix-like operating systems. ... In computer programming, KParts is the name of the component framework for the KDE desktop environment. ... The neutrality of this article is disputed. ... A plugin (or plug-in) is a computer program that can, or must, interact with another program to provide a certain, usually very specific, function. ... KSVG is a svg solution for khtml based browsers. ...

Presto general overview notes

SVG Basic — Presto 9.0 has added quite large, but incomplete SVGB support.

JPEG support

Comparison of various JPEG/JFIF feature support.

		Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab
Operation mode	Baseline	3.0	0	1.0	Yes	N/A	7.0	Yes
	Progressive	3.0	0	1.0	Yes	N/A	7.0	Yes
	Hierarchical	3.0	0	1.0	Yes	N/A	7.0	Yes
	Lossless	3.0	0	1.0	Yes	N/A	7.0	Yes
		Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab

Trident JPEG support notes

Progressive — Does not support progressive display of progressive JPEG.

GIF support

Comparison of various GIF feature support.

		Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab
GIF 87a	Interlacing	3.0	0	1.0	Yes	N/A	7.0	Yes
GIF 89a	Binary transparency	3.0	0	1.0	Yes	N/A	7.0	Yes
GIF 89a	Animation	3.0	0	1.0	Yes	N/A	7.0	Yes
		Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab

PNG support

Comparison of various PNG feature support.

		Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab
Color mode	True color	4.0	0	1.0	Yes	N/A	7.0	Yes
	Grayscale	4.0	0	1.0	Yes	N/A	7.0	Yes
	Palette-based (max. 256 colors)	4.0	0	1.0	Yes	N/A	7.0	Yes
Alpha channel		7.0	0	1.0	Yes	N/A	7.0	Yes
Gamma correction		No	0	1.0	Incorrect	N/A	7.0	?
Color correction		?	0	1.0	?	N/A	?	?
Interlacing		Incorrect	0	1.0	?	N/A	7.0	?
Integrity checking		?	?	?	?	N/A	?	?
		Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab

General PNG support notes

Color mode — There are 15 combinations of the color modes in PNG [6]. Not all modes are available in every image tool through.

Trident PNG support notes

Alpha channel — PNG support was added in version 4 but alpha channel is not supported [7]. This is in IE version 7 Beta 1 [8], which is only available to MSDN suscribers or developers with access to Windows Vista Beta.
Interlacing — Interlaced PNG is displayed progressively, but in 1D instead of 2D.

WebCore PNG support notes

Gamma correction — It is incorrectly applied to unlabeled PNGs [9].

SVG 1.1 support

Comparison of various SVG element support.

Structure Module
	Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab
svg	No	No	1.8	No	N/A	8.0 (SVGT)	No
g	No	No	1.8	No	N/A	8.0 (SVGT)	No
defs	No	No	1.8	No	N/A	8.0 (SVGT)	No
desc	No	No	1.8	No	N/A	8.0 (SVGT)	No
title	No	No	1.8	No	N/A	8.0 (SVGT)	No
metadata	No	No	1.8	No	N/A	8.0 (SVGT)	No
symbol	No	No	1.8	No	N/A	No	No
use	No	No	1.8	No	N/A	8.0 (SVGT)	No
Conditional Processing Module
switch	No	No	1.8	No	N/A	8.0 (SVGT)	No
Image Module
image	No	No	1.8	No	N/A	8.0 (SVGT)	No
Style Module
style	No	No	1.8	No	N/A	No	No
Shape Module
path	No	No	1.8	No	N/A	8.0 (SVGT)	No
rect	No	No	1.8	No	N/A	8.0 (SVGT)	No
circle	No	No	1.8	No	N/A	8.0 (SVGT)	No
line	No	No	1.8	No	N/A	8.0 (SVGT)	No
ellipse	No	No	1.8	No	N/A	8.0 (SVGT)	No
polyline	No	No	1.8	No	N/A	8.0 (SVGT)	No
polygon	No	No	1.8	No	N/A	8.0 (SVGT)	No
Text Module
text	No	No	1.8	No	N/A	8.0 (SVGT)	No
tspan	No	No	1.8	No	N/A	No	No
tref	No	No	No	No	N/A	No	No
textPath	No	No	No	No	N/A	No	No
altGlyph	No	No	No	No	N/A	No	No
altGlyphDef	No	No	No	No	N/A	No	No
altGlyphItem	No	No	No	No	N/A	No	No
glyphRef	No	No	No	No	N/A	No	No
Marker Module
marker	No	No	1.8	No	N/A	No	No
Color Profile Module
color-profile	No	No	No	No	N/A	No	No
Gradient Module
linearGradient	No	No	1.8	No	N/A	8.0	No
radialGradient	No	No	1.8	No	N/A	No	No
stop	No	No	1.8	No	N/A	8.0	No
Pattern Module
pattern	No	No	In progress	No	N/A	No	No
Clip Module
clipPath	No	No	1.8	No	N/A	No	No
Mask Module
mask	No	No	No	No	N/A	No	No
Filter Module
filter	No	No	No	No	N/A	No	No
feBlend	No	No	No	No	N/A	No	No
feColorMatrix	No	No	No	No	N/A	No	No
feComponentTransfer	No	No	1.8	No	N/A	No	No
feComposite	No	No	No	No	N/A	No	No
feConvolveMatrix	No	No	No	No	N/A	No	No
feDiffuseLighting	No	No	No	No	N/A	No	No
feDisplacementMap	No	No	No	No	N/A	No	No
feFlood	No	No	No	No	N/A	No	No
feGaussianBlur	No	No	No	No	N/A	No	No
feImage	No	No	No	No	N/A	No	No
feMerge	No	No	No	No	N/A	No	No
feMergeNode	No	No	No	No	N/A	No	No
feMorphology	No	No	No	No	N/A	No	No
feOffset	No	No	No	No	N/A	No	No
feSpecularLighting	No	No	No	No	N/A	No	No
feTile	No	No	No	No	N/A	No	No
feTurbulence	No	No	No	No	N/A	No	No
feDistantLight	No	No	No	No	N/A	No	No
fePointLight	No	No	No	No	N/A	No	No
feSpotLight	No	No	No	No	N/A	No	No
feFuncR	No	No	No	No	N/A	No	No
feFuncG	No	No	No	No	N/A	No	No
feFuncB	No	No	No	No	N/A	No	No
feFuncA	No	No	No	No	N/A	No	No
Cursor Module
cursor	No	No	No	No	N/A	No	No
Hyperlinking Module
a	No	No	1.8	No	N/A	8.0 (SVGT)	No
View Module
view	No	No	No	No	N/A	No	No
Scripting Module
script	No	No	1.8	No	N/A	No	No
Animation Module
animate	No	No	No	No	N/A	8.0 (SVGT)	No
set	No	No	No	No	N/A	8.0 (SVGT)	No
animateMotion	No	No	No	No	N/A	8.0 (SVGT)	No
animateTransform	No	No	No	No	N/A	8.0 (SVGT)	No
animateColor	No	No	No	No	N/A	8.0 (SVGT)	No
mpath	No	No	No	No	N/A	8.0 (SVGT)	No
Font Module
font	No	No	No	No	N/A	No	No
font-face	No	No	No	No	N/A	8.0 (SVGT)	No
glyph	No	No	No	No	N/A	8.0 (SVGT)	No
missing-glyph	No	No	No	No	N/A	8.0 (SVGT)	No
hkern	No	No	No	No	N/A	8.0 (SVGT)	No
vkern	No	No	No	No	N/A	No	No
font-face-src	No	No	No	No	N/A	8.0 (SVGT)	No
font-face-uri	No	No	No	No	N/A	No	No
font-face-format	No	No	No	No	N/A	No	No
font-face-name	No	No	No	No	N/A	8.0 (SVGT)	No
definition-src	No	No	No	No	N/A	No	No
Extensibility Module
foreignObject	No	No	1.8	No	N/A	8.0 (SVGT)	No
	Trident	Tasman	Gecko	WebCore	KHTML	Presto	iCab

References

Netscape Help. Progressive JPEG Demonstration. URL accessed on May 1, 2005.
Netadvies. Interlaced GIF demo. URL accessed on May 1, 2005.
Jason Summers's web site. Browser test / demonstration pages. URL accessed on May 1, 2005.
PNG and MNG tools. Browser gamma test. URL accessed on May 1, 2005.
PNG (Portable Network Graphics) Home Site. Browser Gamma-Consistency Test. URL accessed on May 1, 2005.
PNG (Portable Network Graphics) Home Site. PNG Interlacing Demo. URL accessed on May 1, 2005.
PNG (Portable Network Graphics) Home Site. PNG-supporting Browsers. URL accessed on May 1, 2005.
Opera Features. SVG. URL accessed on May 1, 2005.
Mozilla SVG Project. Mozilla + SVG Status. URL accessed on May 1, 2005.

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External links

PNG, MNG, JNG and Mozilla M17
SVG rendering engine comparison pages - visual comparison among various FOSS SVG rendering libraries
W3C SVG Test Cases for SVG Full

Categories: Software comparison | Layout engines

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