Fix CMYK jpeg bug

[lilith]

See inactive failing test here:

imageflow/imageflow_core/tests/visuals.rs

Line 387 in df49f42

//fn decode_cmyk_jpeg(){

[danieljuhl]

@lilith is this related to the underlaying issue mentioned in #188 ?

[lilith]

Yes.

[danieljuhl]

Any news on this? Anything I / we can do to make imageflow compatible with CMYK jpeg?

[danieljuhl]

Or at least avoid that imageflow server crashes on CMYK images.

[lilith]

It requires a whole new jpeg codec API (TurboJpeg) and adapter. Not an easy fix.

…

On Thu, Aug 22, 2019, 6:47 AM Daniel Juhl ***@***.***> wrote: Or at least avoid that imageflow server crashes on CMYK images. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#203?email_source=notifications&email_token=AAA2LH6QLQUDN6I3KP6ESPDQF2DFHA5CNFSM4GBFLX4KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD4466UY#issuecomment-523890515>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAA2LHYYYX4XHEQ4L6P5J5DQF2DFHANCNFSM4GBFLX4A> .

[danieljuhl]

How about catching the error, so the server does not crash on CMYK images? Is that an easier fix? :)

[kornelski]

I think it's already trying to catch the error, it's just that catching doesn't work due to rust-lang/rfcs#2699

[lilith]

Turns out that setjmp was simply too late, it needed to be earlier. CMYK jpegs aren't supported but this is no longer a fatal error.