Image.getImageData() sometimes returns the active ImageData

[TuxPaper]

Describe the bug
Image.getImageData() is supposed to return an ImageData where, according to the javadocs, "Modifications made to this ImageData will not affect the Image."

In some cases, it DOES return the ImageData that will affect the Image upon modification.

This is because org.eclipse.swt.internal.DPIUtil#scaleImageData(org.eclipse.swt.graphics.Device, org.eclipse.swt.graphics.ImageData, int, int) returns the live imageData variable directly if certain criteria is met (targetZoom == currentZoom) Line Source. When that criteria isn't met, it correctly returns a copy (because it creates a scaled version)

Expected behavior
Image.getImageData() should always return a duplicate of ImageData and not the actual ImageData of the Image.

Environment:

1. Select the platform(s) on which the behavior is seen:

• • All OS

2. SWT
   Seen on SWT 4.34 (4967r8) on Windows, but probably present on all OS since DPIUtil is cross platform

Workaround (or) Additional context
Lazy workaround is to call scaleTo with same dimensions, ensuring an ImageData that won't modify the original image:

ImageData imageData = image.getImageData();
imageData = imageData.scaledTo(imageData.width, imageData.height);