Remove autoscale upper limit to match SWT DPIUtil

[arunjose696]

The showSplash method was adapted in 3ba28b7 to bring the scaling logic back in sync with org.eclipse.swt.internal.DPIUtil. During this change, the upper limit for the autoscale value (200) was taken directly from SWT and added in showSplash. However, following eclipse-platform/eclipse.platform.swt#111, the SWT.autoscale upper limit was removed.

This change removes the upper limit here as well, ensuring the scaling logic remains consistent and the splash screen renders correctly across different DPI settings.

This Fixes eclipse-platform/eclipse.platform.swt#2792

Steps to reproduce the fix:

1)Clone the repo and run /org.eclipse.equinox.executable.feature/library/win32/build.bat to generate eclipse_11916.dll.
2)Download a eclipse ibuild and extract its contents to <ECLIPSE_INSTALL_DIR>
3)Then, copy the DLL file in step 1 to <ECLIPSE_INSTALL_DIR>/plugins/<EQUINOX_LAUNCHER_FOLDER>.

Start the IDE in ibuild at 300% zoom. Without this change, the issue mentioned in eclipse-platform/eclipse.platform.swt#2792 would appear.

before

old.mp4

with the change

new.mp4

[amartya4256]

@arunjose696 the build is failing. I think you need a version bump in equinox.

[arunjose696]

@arunjose696 the build is failing. I think you need a version bump in equinox.

I have rebased on master which has the version bumps.

@laeubi or @akurtakov could you please approve the workflows

[github-actions]

Test Results

  846 files  ±0    846 suites  ±0   1h 50m 48s ⏱️ -53s
2 234 tests ±0  2 185 ✅ ±0   49 💤 ±0  0 ❌ ±0 
6 702 runs  ±0  6 553 ✅ ±0  149 💤 ±0  0 ❌ ±0 

Results for commit b0faf6b. ± Comparison against base commit 1cc2026.

♻️ This comment has been updated with latest results.

[HeikoKlare]

A comment in this method correctly states:

this implementation needs to be kept in sync with org.eclipse.swt.internal.DPIUtil#setDeviceZoom(int)

That did not happen after eclipse-platform/eclipse.platform.swt#111 (and unfortunately SWT documentation was also not properly updated with that change and just recently adapted: eclipse-platform/eclipse.platform.swt#2945).

This change properly aligns the image size used by the native launcher with the SWT settings again.

@akurtakov @HannesWell maybe one of you can process this PR?

[akurtakov]

@eclipse-equinox/eclipse-equinox-project-leads I propose nominating @HeikoKlare for committer so he can take care of such Windows specific changes unless you have another plan how to handle such PRs.

[HannesWell]

change properly aligns the image size used by the native launcher with the SWT settings again.

Sounds reasonable.

Thanks for this.