Presto (layout engine) Information & Presto (layout engine) Links at HealthHaven.com

Presto
Developer(s)	Opera Software ASA
Stable release	2.2.15
Written in	C++
Operating system	Cross-platform
Type	Application framework / Software component
License	Proprietary
Website	dev.opera.com

Presto is a layout engine for the Opera web browser developed by Opera Software. After several public betas and technical previews, it was released on January 28, 2003 in Opera 7.0 for Windows; it is the browser's current layout engine. Presto is dynamic: the page or parts of it can be re-rendered in response to DOM and script events. Presto is available only as a part of Opera browser or related products. The source or binary (DLL) forms of the engine are not publicly available. Subsequent releases have seen a number of bugs fixed and optimisations to improve the speed of the ECMAScript ("JavaScript") engine.

[edit] JavaScript engines

The "Linear A" is a JavaScript engine used in older versions of Opera. Versions based on the "Core" fork of Presto, Opera 7.0 through 9.27, use the "Linear B" engine.^[1] The "Futhark" engine is used in versions based on the "Core 2" fork of Presto, namely Opera 9.5 to Opera 10.^[2]

Future versions of Opera will use the "Carakan" engine which will feature register-based bytecode, native code generation, automatic object classification and overall performance improvements.^[3]

[edit] History and development

Presto Version	JavaScript engine	Browser code name	Opera Browser	Opera Mobile	Other use	New features
pre Presto	unnamed	unnamed	3.5
pre Presto	Linear A	Electra/unnamed ^[4]	4.0
1.0	Linear B	unnamed	7
2.0	Linear B	Merlin	9.0		Internet Channel^[5]	Canvas, Acid2 Test: passed, Rich text editing, XSLT and XPath
2.1	Futhark	Kestrel	9.5	9.5^[6]		SVG Tiny 1.2, SVG as CSS, SVG as <img>, Audio object
2.1.1	Futhark	Kestrel	9.6			Scope API^[7]
2.2	Futhark	Peregrine		9.7^[8]
2.2.15	Futhark	Peregrine	10^[9]	9.8^[10]		Acid3 test: 100/100, pixel-perfect, Web fonts, CSS Selectors API, RGBA & HSLA opacity, TLS 1.2.^[11], FPS in SVG, SVG fonts in HTML
2.3	Futhark				Opera Devices SDK 10	CSS3 : border-radius (rounded corners), box-shadow, transitions; HTML5: <audio> and <video> elements
2.4	Carakan^[12]			10		CSS3 : transforms

[edit] Presto-based applications

[edit] Web browsers

Opera 7 and above
Opera Mobile
Opera Mini
Nintendo DS Browser (based on Opera)^[13]
Nintendo DSi Browser (based on Opera)^[14]
Nokia 770 Browser (based on Opera)
Sony Mylo COM-1's Browser (based on Opera)^[15]
Wii Internet Channel Browser (based on Opera)^[16]

[edit] HTML editors

Macromedia Dreamweaver MX to Dreamweaver CS3 (CS4 uses Webkit)
Adobe Creative Suite 2^[17]
Adobe Creative Suite 3^[18]
Virtual Mechanics SiteSpinner Pro^[19]

[edit] References

^ Sivonen, Henri (2006-11-23). "Names of Browser Engines". http://hsivonen.iki.fi/engines/. Retrieved 2007-01-03.
^ Bointon, Marcus (2006-12-19). "SunSpider Benchmarks: WebKit Rocks". Pet Pixels. http://marcus.bointon.com/archives/50-SunSpider-Benchmarks-WebKit-Rocks.html. Retrieved 2007-01-03.
^ Lindström, Jens (2009-02-05). "Carakan - By Opera Core Concerns". Opera Software. http://my.opera.com/core/blog/2009/02/04/carakan. Retrieved 2009-02-05.
^ Opera version history At first Electra was the codename for the Opera 4.0 browser but was later designated as a layout engine name for Opera versions 3.5 through 6
^ "Opera Dragonfly documentation". Opera Software. http://www.opera.com/dragonfly/documentation/. Retrieved 2009-02-27.
^ "Reviewer’s Guide to Opera Mobile 9.5 Beta". Opera Software. http://www.opera.com/press/reviews/mobile/#new. Retrieved 2009-02-27.
^ Lawson, Bruce (2008-09-10). "Opera Presto 2.1 - Web standards supported by Opera’s core". Opera Software. http://dev.opera.com/articles/view/presto-2-1-web-standards-supported-by/. Retrieved 2009-02-27.
^ Opera Software (2009-03-26). "Opera announces the new Opera Mobile 9.7 at CTIA Wireless 2009 – a server-accelerated full Web experience for smartphones and mobile devices". Press release. http://www.opera.com/press/releases/2009/03/26/. Retrieved 2009-06-11.
^ released
^ Opera Software (2009-06-02). "Opera Software grows in Poland: International Web browser company celebrates the Warsaw office opening". Press release. http://www.opera.com/press/releases/2009/06/02/. Retrieved 2009-06-11.
^ Pettersen, Yngve Nysæter (2009-02-25). "New in Opera Presto 2.2: TLS 1.2 Support". Opera Software. http://my.opera.com/core/blog/2009/02/25/new-in-opera-presto-2-2-tls-1-2-support. Retrieved 2009-02-27.
^ [1]
^ Opera Software ASA (2006-07-24). "Surf in Bed: Nintendo DS Browser hits Japan". Press release. http://www.opera.com/pressreleases/en/2006/07/24/. Retrieved 2008-11-02.
^ Rahul Srinivas and Jon S. von Tetzchner (2008-10-08). "Operating Systems are Less Important: Opera". Techtree. http://www.techtree.com/India/News/Operating_Systems_are_Less_Important_Opera/551-93947-580.html. Retrieved 2009-02-25.
^ Opera Software ASA (2006-08-23). "Sony Electronics uses the Opera browser for its new mylo personal communicator". Press release. http://www.opera.com/pressreleases/en/2006/08/23/. Retrieved 2008-11-02.
^ Opera Software ASA (2006-12-22). "Play with the Web: Opera browser now available for download on Wii". Press release. http://www.opera.com/pressreleases/en/2006/12/22/. Retrieved 2008-11-02.
^ Opera Software ASA (2005-04-04). "Powered by Opera: Opera Integrated with Adobe Creative Suite 2". Press release. http://www.opera.com/pressreleases/en/2005/04/04/index.dml. Retrieved 2008-11-02.
^ "Adobe Creative Suite 3 (CS3) uses built-in Opera for rendering engine". 2007-03-28. http://operawatch.com/news/2007/03/adobe-creative-suite-3-cs3-uses-built-in-opera-for-rendering-engine.html. Retrieved 2008-04-20.
^ Virtual Mechanics Inc. (2008-11-18). "Design Web Pages for the Desktop and Mobile Devices". Press release. http://www.virtualmechanics.com/company/press1108.html. Retrieved 2008-11-18.

[edit] External links

[0] Sivonen, Henri (2006-11-23). "Names of Browser Engines". http://hsivonen.iki.fi/engines/. Retrieved 2007-01-03.

[1] Bointon, Marcus (2006-12-19). "SunSpider Benchmarks: WebKit Rocks". Pet Pixels. http://marcus.bointon.com/archives/50-SunSpider-Benchmarks-WebKit-Rocks.html. Retrieved 2007-01-03.

[2] Lindström, Jens (2009-02-05). "Carakan - By Opera Core Concerns". Opera Software. http://my.opera.com/core/blog/2009/02/04/carakan. Retrieved 2009-02-05.

[electra_unnamed-3] Opera version history At first Electra was the codename for the Opera 4.0 browser but was later designated as a layout engine name for Opera versions 3.5 through 6

[4] "Opera Dragonfly documentation". Opera Software. http://www.opera.com/dragonfly/documentation/. Retrieved 2009-02-27.

[5] "Reviewer’s Guide to Opera Mobile 9.5 Beta". Opera Software. http://www.opera.com/press/reviews/mobile/#new. Retrieved 2009-02-27.

[6] Lawson, Bruce (2008-09-10). "Opera Presto 2.1 - Web standards supported by Opera’s core". Opera Software. http://dev.opera.com/articles/view/presto-2-1-web-standards-supported-by/. Retrieved 2009-02-27.

[7] Opera Software (2009-03-26). "Opera announces the new Opera Mobile 9.7 at CTIA Wireless 2009 – a server-accelerated full Web experience for smartphones and mobile devices". Press release. http://www.opera.com/press/releases/2009/03/26/. Retrieved 2009-06-11.

[8] released

[9] Opera Software (2009-06-02). "Opera Software grows in Poland: International Web browser company celebrates the Warsaw office opening". Press release. http://www.opera.com/press/releases/2009/06/02/. Retrieved 2009-06-11.

[10] Pettersen, Yngve Nysæter (2009-02-25). "New in Opera Presto 2.2: TLS 1.2 Support". Opera Software. http://my.opera.com/core/blog/2009/02/25/new-in-opera-presto-2-2-tls-1-2-support. Retrieved 2009-02-27.

[carakan-11] [1]

[12] Opera Software ASA (2006-07-24). "Surf in Bed: Nintendo DS Browser hits Japan". Press release. http://www.opera.com/pressreleases/en/2006/07/24/. Retrieved 2008-11-02.

[13] Rahul Srinivas and Jon S. von Tetzchner (2008-10-08). "Operating Systems are Less Important: Opera". Techtree. http://www.techtree.com/India/News/Operating_Systems_are_Less_Important_Opera/551-93947-580.html. Retrieved 2009-02-25.

[14] Opera Software ASA (2006-08-23). "Sony Electronics uses the Opera browser for its new mylo personal communicator". Press release. http://www.opera.com/pressreleases/en/2006/08/23/. Retrieved 2008-11-02.

[15] Opera Software ASA (2006-12-22). "Play with the Web: Opera browser now available for download on Wii". Press release. http://www.opera.com/pressreleases/en/2006/12/22/. Retrieved 2008-11-02.

[16] Opera Software ASA (2005-04-04). "Powered by Opera: Opera Integrated with Adobe Creative Suite 2". Press release. http://www.opera.com/pressreleases/en/2005/04/04/index.dml. Retrieved 2008-11-02.

[17] "Adobe Creative Suite 3 (CS3) uses built-in Opera for rendering engine". 2007-03-28. http://operawatch.com/news/2007/03/adobe-creative-suite-3-cs3-uses-built-in-opera-for-rendering-engine.html. Retrieved 2008-04-20.

[18] Virtual Mechanics Inc. (2008-11-18). "Design Web Pages for the Desktop and Mobile Devices". Press release. http://www.virtualmechanics.com/company/press1108.html. Retrieved 2008-11-18.

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