JPG Progressive Images

[obustosm]

Hey there!

First of all, thanks for all the effort put on PhotoSphereViewer. I'm a very big fan of taking these photos for showing them to relatives and friends.

Now the idea: I know that PSV loads a low quality image and after the big load, puts this last visible but:

• If i got a progressive JPG image, PSV can inmediately show anything and improve it's UX.

¿Can it be done? ¿Can it be marked for being a new feature for PSV?

Thanks for taking part of your time reading this comment.

[mistic100]

AKAIK ThreeJS has no support for progressive JPEG and I am not willing to implement it myself (that would mean adding another library).

If you have a performance issue I suggest you use the tiling system with low resolution base panorama https://photo-sphere-viewer.js.org/guide/adapters/equirectangular-tiles.html

It will always be better than a single progressive image anyway. Remember that the image is downloaded by the CPU then transfered to the GPU, JS being single threaded this always induce a small stutter (for large images). So if you had a large progressive JPEG with say 4 levels, that would mean 4 GPU transfers with longer and longer stutters.

With the tiling system there is almost no stutter because each individual texture image is small.

[mistic100]

Also don't hesitate the use the search function #114

[obustosm]

I did... Maybe asked in a different way, thanks anyway ;)