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When the zoom level is configured from 100 to 150, the icons in Eclipse popup menus become blurry. #3582
Description
Summary: Popup menu icons are blurry when display zoom is changed at
runtime from 100% to 150%
Description:
Steps to Reproduce:
- Start Eclipse with the Windows display zoom set to 100%.
- Right-click any view (e.g., Project Explorer) to open a popup/context
menu. The menu item icons are sharp at this step. - Change the display zoom to 150%
(Windows Settings -> System -> Display -> Scale: 150%). - Do NOT restart Eclipse; right-click the same view again to open the
popup menu. - Observe that the menu item icons are now blurry.
Expected Behavior:
Popup menu icons remain sharp after a runtime zoom change, with the same
quality as when Eclipse is started directly at that zoom level.
Actual Behavior:
Icons in popup menus are blurry / pixelated after changing the zoom from
100% to 150% at runtime. Toolbar icons and other UI elements remain sharp.
Control tests (all performed on the same machine):
- 100% -> 175% at runtime: NOT blurry.
- Started Eclipse directly at 150%: NOT blurry.
- Started at 100% then changed to 150% at runtime: BLURRY (only this
combination triggers the issue).
=> The blur is specific to the runtime zoom-change path, not to the 150%
zoom level itself.
zoom level 150 image:
zoom level 175 image:
Environment:
- OS: Windows 11 Pro 23H2 (64-bit)
- Eclipse: 2026-03 (4.39.0)
- JDK: Temurin 21.0.x
- HiDPI mode: Windows per-monitor scaling, display zoom 150%
Additional Notes:
zoom level 150:
Activity
HeikoKlare commentedon Sep 10, 2026
Can you please post the complete configuration of our product, including all VM arguments and the preference value for the monitor-specific UI scaling?
We have experienced such wrong scaling of menu entries in the past and implemented quite some logic to produce properly scaled images and since then have not had any reports of such isues.
The posted screenshots are inconclusive for me for different reasons:
When I apply the described workflow, I get this (expected) result on 150%:
real2019 commentedon Sep 10, 2026
eclipse.ini params:
-startup
plugins/org.eclipse.equinox.launcher_1.7.100.v20251111-0406.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.3.0.v20260203-2149
-product
org.eclipse.epp.package.rcp.product
-showsplash
org.eclipse.epp.package.common
--launcher.defaultAction
openFile
--launcher.appendVmargs
-vm
plugins/org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_21.0.10.v20260205-0638/jre/bin
-vmargs
-XX:CompileCommand=quiet
-XX:CompileCommand=exclude org.eclipse.jdt.internal.core.dom.rewrite.ASTRewriteAnalyzer::getExtendedRange
-Dorg.eclipse.ecf.provider.filetransfer.excludeContributors=org.eclipse.ecf.provider.filetransfer.httpclientjava
-Dosgi.requiredJavaVersion=21
-Dosgi.instance.area.default=@user.home/eclipse-workspace
-Dosgi.dataAreaRequiresExplicitInit=true
-Dorg.eclipse.swt.graphics.Resource.reportNonDisposed=true
-Declipse.e4.inject.javax.warning=false
-Dsun.java.command=Eclipse
-Declipse.platform.mergeTrust=true
-XX:+UseG1GC
-XX:+UseStringDeduplication
--add-modules=ALL-SYSTEM
-javaagent:D:\eclipse-new-2026\lombok.jar
preference value for the monitor-specific：
org.eclipse.ui.prefs:
eclipse.preferences.version=1
monitorSpecificScaling=true
Please let me know if any other configuration is needed. If the problem is due to my setup, I would appreciate it if you could point out what is wrong.
HeikoKlare commentedon Sep 10, 2026
Is your installation an older Eclipse release that you have updated? If yes, have you tried with a completely fresh Eclipse 2026-03 installation?
If I remember correctly, we have replaced the Equinox executable configuration with 2026-03 and maybe that one is not updated properly and produces a wrong DPI awareness. I do currently not see any other differences to other/ordinary setups.
real2019 commentedon Sep 11, 2026
It is indeed an extracted (zip) installation. There is also an older Eclipse version on this machine, installed the same way via extraction — they are in separate directories and I did not update over the old one.
Windows dpi awareness infomation
real2019 commentedon Sep 14, 2026
Addendum: Software launches with zoom 100. Setting Windows zoom to 150 causes blurriness. After switching zoom to 150 and restarting Eclipse, right‑click menu icons render sharp.
HeikoKlare commentedon Sep 14, 2026
That means that monitor-specific scaling does not work properly, because no blurry scaling should happen when that option is activated. I don't see how that can happen. In particular, the application seems to be running with "PerMonitor V2" DPI awareness, according to your latest screenshot. Is there anything in the logs of your application pointing to an issue with activating monitor-specific scaling?
real2019 commentedon Sep 15, 2026
Yes, the application is running under PerMonitorV2 DPI awareness.
The blurry icon issue only occurs when starting Eclipse with Windows zoom set to 100%, then switching Windows display scaling to 150% without restarting Eclipse.
After restarting Eclipse with Windows zoom already set to 150%, the right‑click menu icons become sharp.
I have checked the application logs, and there is no error log related to monitor‑specific scaling activation.