Maybe I'm late to the party, but I don't know what the PUA issue is? I suggest we offer gaia-icons repo that's an easy/ready-to-go package. If app owners wish to refine the icon-font to just the glyphs they need (to trim off a few kb) then they could run their own grunt-webfont script using a sub-set of SVGs from the gaia-icons repo. I'm always in favor of anti-magic/transparent solutions and performance work once issues are proven, not before :)
W. ----- Original Message ----- From: "Jonathan Kew" <j...@mozilla.com> To: "Wilson Page" <wilsonp...@mozilla.com> Cc: "Jet Villegas" <j...@mozilla.com>, "Patryk Adamczyk" <padamc...@mozilla.com>, "John Daggett" <jdagg...@mozilla.com>, "b2g-internal" <b2g-inter...@mozilla.org>, "Cameron McCormack" <hey...@gmail.com>, "Jonathan Watt" <jw...@mozilla.com>, "L. David Baron" <dba...@mozilla.com>, "Jaime Chen" <jac...@mozilla.com>, "Vivien" <vnico...@mozilla.com>, "sicking" <sick...@mozilla.com>, "Robert O'Callahan" <rocalla...@mozilla.com>, "mozilla.dev.platform group" <dev-platform@lists.mozilla.org> Sent: Tuesday, June 17, 2014 12:08:52 PM Subject: Re: Icon fonts in FxOS On 17/6/14 11:52, Wilson Page wrote: I'm inlining to minimise cross-origin issues and to reduce requests. The entire asset is <12k so I'm really not concerned with performance here, especially considering the number of PNG assets this replaces. We've been using a similar approach in Camera for quite some time and all has been well. I think there are better areas we can focus performance efforts. I'm not exactly sure if glyphs are still assigned to code points within the generated font, is that an issue? I looked at the embedded font in your CSS file, and it has the icons encoded at PUA character codes U+E001..E01D. If we could avoid exposing PUA codes at all, that would be helpful, as it eliminates any risk that authors actually use (non-portable) PUA codes to render the icons. AFAIK, it should be possible to do this. In fontforge, the glyphs are referenced by name; they shouldn't need codepoints assigned. <blockquote> IMO we should just treat icon assets in the same way we do images assets. Baking them into the platform seems like it could cause unnecessary complications further down the line, for negligible perf gains. At the end of the day we're a collection of web-apps, the more we exploit our platform power, the further we distance ourselves from the real web platform. </blockquote> If this works acceptably, can we close bug 951593 (and 1008458) as WontFix? That'd be awesome, IMO, as none of the proposed strategies there are really satisfactory. Where are we at w.r.t. the launch regression that was filed as bug 1002904? Has the data-URL version of the embedded font been tried there? One other optimization you might want to consider - especially as the icon collection grows - is to have your build scripts generate a custom font subset for each app that's using them, instead of having all the apps (separately) load the complete set of icons even if they only need a few. So the original collection of graphics would be a shared "building block" resource, but the actual CSS that embeds the font would be individually generated for each app depending on its needs. (Presumably it'd be simple to scan the app's files and determine exactly which icons it needs.) JK <blockquote> W. ----- Original Message ----- From: "Jonathan Kew" <j...@mozilla.com> To: "Wilson Page" <wilsonp...@mozilla.com> , "Jet Villegas" <j...@mozilla.com> Cc: "Patryk Adamczyk" <padamc...@mozilla.com> , "John Daggett" <jdagg...@mozilla.com> , "b2g-internal" <b2g-inter...@mozilla.org> , "Cameron McCormack" <hey...@gmail.com> , "Jonathan Watt" <jw...@mozilla.com> , "L. David Baron" <dba...@mozilla.com> , "Jaime Chen" <jac...@mozilla.com> , "Vivien" <vnico...@mozilla.com> , "sicking" <sick...@mozilla.com> , "Robert O'Callahan" <rocalla...@mozilla.com> , "mozilla.dev.platform group" <dev-platform@lists.mozilla.org> Sent: Tuesday, June 17, 2014 11:31:18 AM Subject: Re: Icon fonts in FxOS On 17/6/14 11:10, Wilson Page wrote: <blockquote> The gaia-icons font currently uses ligatures to place icons, see here . The ligature character sequence is derived from the original filename of the SVG source file in `images/`. Is this what you were referring to? </blockquote> OK, so if you're using ligatures to access the icon glyphs, can you modify the script that generates this font so that it does NOT assign PUA codepoints to the glyphs at all? It should be possible to leave them unencoded (i.e. with no entry in the font's cmap), so that the only way they can be accessed is via the ligature sequence. I see you're embedding the generated font directly in a CSS file as a data-URL. How's the performance of this approach? It won't be quite as efficient as installing the font in the base OS, because each app that uses it will be instantiating its own separate copy, so there must be a memory and perf cost. But maybe it's good enough? JK <blockquote> ----- Original Message ----- From: "Jet Villegas" <j...@mozilla.com> To: "Wilson Page" <wilsonp...@mozilla.com> Cc: "Patryk Adamczyk" <padamc...@mozilla.com> , "John Daggett" <jdagg...@mozilla.com> , "b2g-internal" <b2g-inter...@mozilla.org> , "Cameron McCormack" <hey...@gmail.com> , "Jonathan Watt" <jw...@mozilla.com> , "L. David Baron" <dba...@mozilla.com> , "Jaime Chen" <jac...@mozilla.com> , "Vivien" <vnico...@mozilla.com> , "sicking" <sick...@mozilla.com> , "Robert O'Callahan" <rocalla...@mozilla.com> , "Jonathan Kew" <j...@mozilla.com> , "mozilla.dev.platform group" <dev-platform@lists.mozilla.org> Sent: Tuesday, June 17, 2014 12:54:57 AM Subject: Re: Icon fonts in FxOS Wilson: How difficult would it be to have your grunt script add a dlig table to your font? https://www.microsoft.com/typography/otspec/features_ae.htm#dlig https://bugzilla.mozilla.org/show_bug.cgi?id=1008458#c22 --Jet ----- Original Message ----- From: "Wilson Page" <wilsonp...@mozilla.com> We are using icon-fonts in some of the new web-component based building-blocks examples. I have created a gaia-icons repo so that our components can explicitly depend on these icons. Inside this repo we have all the source SVGs inside `images/`. A grunt task called grunt-webfont converts all these SVGs into a single icon-font. To add new icons, you simple have to drop new SVGs into the `images/` directory. </blockquote> </blockquote> _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
