Progressive JPEG with SDWebImageProgressiveLoad

[maniacs-engineerica]

Hi, I am trying to download a JPEG progressively non linearly, like this one:

But it is updated linearly when using SDWebImageProgressiveLoad.

Am I missing something?

[dreampiggy]

I guess this is related to something changes on Apple's ImageIO.

I test progressive JPEG2000 images can render actually progressivelly on iOS 10. But long time after that test.

You can try to debug the reason by looking into the ImageIOCoder, which use Apple's official documentation for decoding.

[RodolfoGS]

I've the same issue, the download is baseline instead progressive , anyone could change this?

Baseline vs progressive: https://medium.com/hd-pro/jpeg-formats-progressive-vs-baseline-73b3938c2339#:~:text=While%20baseline%20renders%20line%20by,the%20web%20browser's%20rendering%20engine.