[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 #9 from Brian Stell <bstell at google.com>  2011-06-22 17:05:27 PST ---
Issue 1: Right now WebKit loads all listed webfonts even if they are not used. Yuzo's bug 42154 is trying to only download a webfont if it is actually used.

Issue 2: There is overhead in each subset. In a private conversation I asked Raph Levien of Google Webfonts and he estimates the subset overhead to be around 10%. I plan to look at making that smaller but it won't go away entirely so lots of subsets would negate any advantage. 

Issue 3: If we use big subsets then the size works as a penalty for when multiple fonts for short runs. If the goal was only one font then this is not much of a problem. However, if web apps are to compete with desktop apps then people should be able to produce rich typography; eg, use of semi-bold, semi-condensed, style variations. Big subsets make these costly.

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