Bug 108074

Summary: [Meta] Accelerate complex font path and consider removing simple path
Product: WebKit Reporter: Dominik Röttsches (drott) <d-r>
Component: ANGLEAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: behdad, dino, efidler, mitz, nicolas.mailhot, pierre.rossi
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on: 113373    
Bug Blocks:    

Description Dominik Röttsches (drott) 2013-01-28 04:52:49 PST
As discussed in https://bugs.webkit.org/show_bug.cgi?id=37984#c28 and below Nicolas and Behdad suggest to go the Firefox way, optimize the complex font path using caching for shaping results of TextRun and phase out the simple font path altogether.

Their argument is, the simple path + the heuristics to change to complex path are too fragile. In too many cases the simple path assumption fails.

I am creating a meta bug to discuss and track this.
Comment 1 Nicolas Mailhot 2013-01-28 08:39:14 PST
BTW anyway wanting to keep the simple path should study African scripts, as they are doing mightily weird stuff on a latin base.
Comment 2 Dominik Röttsches (drott) 2013-02-04 07:23:18 PST
CC'ing Dan. I created this bug mainly to start the discussion - and follow up on the suggestions Behdad and Nicolas brought up in the previous thread. 

Dan, you created for example bug 100050 - which probably touches on similar issues - I am not sure this one and similar issues can be solved with workarounds applied to the simple path.