5.5.0

Display and rendering

• Add ARC WCS projection support
• Add option to zoom multiview panels separately
• Improve multiview layouts, flat-grid density, and grid label sizing
• Improve map projection, annotation, SWEK, and connection rendering performance

Image loading and data

• Load user color lookup tables from $HOME/JHelioviewer-SWHV/Settings/user-luts.txt
• Harden FITS metadata handling, WCS parsing, LUT restoration, BLANK/BZERO/BSCALE handling, and clipping range behavior
• Speed up FITS loading with faster Rice decompression and normalized pixel-conversion lookup tables
• Improve JPIP/J2K robustness, including socket buffering, premature EOF handling, dropped decode callbacks, and resource cleanup
• Improve image-layer loading ownership and asynchronous decode handling

Application control and integration

• Set IAS as default image data server, remove the automatic setting, and restore the preference in Settings
• Allow server-like headless operation, including full software rendering (see extra/samp)
• Expand SAMP support for image load completion and FITS view settings
• Improve startup, crash reporting, uncaught exception routing, and ANGLE diagnostics

Timeline, events, and UI

• Improve timeline rendering performance with off-EDT polyline building, cached SWEK events, and reduced repaint churn
• Improve SWEK event insertion and association, related-event lookup, timeline cache, and popup ownership
• Reduce Swing coupling in layer options and layer selector updates

Technical

• Expand GLSL/WCS validation coverage, including SwiftShader and Electron-backed shader checks
• Rework and tighten display/viewpoint/camera internals
• Various profile-driven optimizations, bug fixes, cleanups, and major internal refactoring