[Webkit-unassigned] [Bug 74286] [Chromium] Use decoding swizzle only on libjpeg-turbo 1.1.90+

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=74286





--- Comment #3 from Hironori Bono <hbono at chromium.org>  2011-12-13 01:43:31 PST ---
Greetings Peter,

Many thanks for your comments.

(In reply to comment #2)
> Is there any way to query the libjpeg-turbo version, either via macros, or in some sort of package configure script that can then set the appropriate Chrome build options?

Unfortunately, I cannot find any macros representing the version in the (original) source code of libjpeg-turbo. I will file a feature request for it.

> I kind of dislike turning this off for all "use system libraries" cases because then even systems with more recent libraries miss out on the optimization.

It makes sense. I have focused on the "use_system_jpeg=1" option too much even though this bug name is "Use decoding swizzle only on libjpeg-turbo 1.1.90+".

Until libjpeg-turbo adds its version number, should we enable this swizzle code for performance or disable it for compatibility with existing libjpeg-turbo?

Regards,

Hironori Bono

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