[Win32] Monitor-Specific Scaling (Umbrella)

[HeikoKlare]

For the Windows implementation of SWT, an enhanced HiDPI mode supporting monitor-specific scaling has been introduced. Incremental development of the feature has started at the beginning of 2024. It was officially available as an experimental feature in Eclipse releases starting from 2024-12 and is successively being improved:

• News 2024-12 Release
• News 2025-03 Release
• News 2025-06 Release

This serves as an umbrella for tracking an prioritizing issues experienced with the monitor-specific scaling support. It is supposed to contain issues that are specific to that enhanced HiDPI support and not to HiDPI support in general.
Please still create separate issues but add them to the list in this umbrella issue or write a comment so that we can add your issue with according priority.

This list is a starting point to be soon extended with further known issues.

High

• Win: Eclipse IDE freeze with Hover across screens with different UI scaling #557
• [Win32] Wrong font in status line #2066
• [Win32] Elements have wrong size on HighDPI Montior #2040
• [Win32] Program icon missing in application switch view after primary monitor zoom change #2139
• Text sometimes partially disappears in Label when using autoscaling #2166
• [win32] Drop from other application not working on secondary monitors #2246
• [Win32] CTabFolder header is missing #2346
• [Win32] Some icons are missing #2350
• StackOverflowError in Image when auto-scaling differs from device zoom #2353
• [Win32] Wrong text extent calculation with swt.autoScale=int200 #2361
• [Win32] Drag and drop offset on secondary monitor without monitor-specific scaling #2394
• UI broken after DPI change event #2432
• On win32, if GC drawable is not autoscalable GC.drawImage can cut of parts of the image #2504
• [Win] Images in MenuItems are scaled incorrectly when autoscaling is disabled #2537
• Dialogs open with wrong zoom level #2608
• Application icon doesn't render after upgrading #2638
• [Win32] Parts of controls are cut off #2641
• [Win32] Some controls are incorrectly placed #2643
• When both the Classic theme and the Use monitor-specific UI scaling setting are enabled, view toolbars appear in the wrong place #2746

Medium

• Links in empty Package Explorer are cut off #2003
• Progress bar is off in splash screen #2031
• [Win32] Shell image broken #2037
• Add option to create transparent Image with alpha channel when using ImageGcDrawer [Multi-Monitor][HiDPI] #2046
• "Smooth" scaling produces blurry images after calling image.getImageData().clone() #2052
• Text sometimes partially disappears in Section when using autoscaling eclipse.platform.ui#2980
• Font size of Line number ruler is different when using swt.autoScale=int200 #2385
• [Win32] Wrong line height in StyledText when deviceZoom > nativeZoom #2405
• Eclipse 2025-06: UI rendering issues on Windows with monitors using different scale factors #2494
• [Win32] GC#drawImage can produce memory leak #2499
• [Windows Hi-DPI] Progress icon is too big and clipped #706
• Splash Screen scaling issue on Windows with 300% OS level zoom #2792
• [Windows] Per-window-auto-scaling broke computerSize(wHint, SWT.DEFAULT) #3119
• [Win] StyledText with paint artifacts #3298

Low

• [Win32] Retrieving handle for cursor leads to non-disposed resource error #2355

Uncategorized

• HiDPI improvements in SWT with single and multiple monitor setup. #62
• [Multi-Monitor] SWT should pick the right zoom value based on the monitor it's launched. #128
• EXPERIMENTAL HiDPI settings render dialog options un-readable #1704
• [Tree/Table Image] The item image is wrongly scaled with Eclipse 4.36 eclipse.platform.ui#3050 (comment)