[Bug] Image Manipulation Resets After Progressive Load in Stack Viewport

[kushgadhvi16]

Describe the Bug

This issue occurs when using progressive load with a stack viewport. The expected behaviour is that any applied image manipulations (such as window/level, zoom, and pan) should persist after an image is updated from lossy to lossless. However, all transformations are reset, requiring the user to reapply them manually. The same behaviour is observed when scrolling through images in the stack viewport—each new image load resets all transformations.
This is because, in StackViewport, for _updateActorToDisplayImageId function sameImageData is coming as false since lossy and lossless have different rows and columns.

Steps to Reproduce

1. Enable progressive load in the OHIF viewer.
2. Apply any image manipulations (WW/WL, zoom, pan).
3. Changes are rested when the image changes from lossy to lossless or when scrolling to slices.

The current behavior

Manipulation is rested when scrolling or when the image is changed from lossy to lossless.

The expected behavior

Manipulation like WW/WL zoom pan should be retained.

OS

macOS 15.1.1

Node version

20.18.1

Browser

Chrome

[sedghi]

I think i know what is going on. We should getPresentation and setPresentation after update. Do you have reproducible example?