[Webkit-unassigned] [Bug 61561] add support for "on demand" webfonts

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=61561





--- Comment #1 from Brian Stell <bstell at google.com>  2011-05-26 14:58:14 PST ---
I'm developing an experimental prototype to speed up webfonts by only loading the minimally needed parts of a webfont. This is beneficial where most of a font is not needed; eg, short runs of a unique font like blog titles; CJK fonts where on any given page only a small subset is used; etc.

When this type of webfont is accessed for the very first time a stripped version (base) of the font is requested. 

On all page loads we record which characters we do no yet have data for. Once the page is loaded we request any needed data. When this data arrives we merge it with the already downloaded data, cache it for future reuse, and redraw.

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