This release doubles down on bringing in the KTX2 texture format (as part of Basis Universal output). Since KTX2 is a direct successor to KTX, it's reasonable to drop support for old ETC1/ETC2/KTX encoders now. Beware, if your project uses export to either of the old formats, it will be automatically migrated to KTX2.

• KTX2 container added to Basis Universal output file type.
• UASTC textures (.ktx2/.basis) are always compressed with ZSTD.
• ETC1/ETC2/KTX output support removed (in favor of KTX2).
• CLI mode to compress images into KTX2/Basis textures (--basis-pack).
• Dockerfile added. Thanks to @Rubonnek. See #145
• Previously muted notifications can be unmuted from the settings window ("General" tab).

This release brings a bunch of long-awaited goodies (like CLI interface and selective multi-atlas export) along with a few important fixes.

Here's the whole list of important changes:

• Headless batch processing mode support. Read more https://github.com/crashinvaders/gdx-texture-packer-gui#command-line
• Option to select multiple atlases for processing. New action - packMultipleAtlases. See #67
• Atlases use the new libGDX atlas output format by default ("Legacy format" is unchecked).
• Add "show in file manager" contextual options.
• Basis Universal Textures updated to 1.16.4 and is nativelly supported on Linux arm32/arm64 (Raspberry Pi) and macOS arm64 (M1/M2 chips).
• Fixed file conflict errors when attempting to install from RPM package. See #140
• Fixed a crash on a project save when the output dir is set to any ascendant parent dir of the project-containing folder. See #126
• Fixed grid layout adds redundant top padding.
• Fixed hotkeys don't work if any text field is focused.

A long awaited release with a bunch of quality of life improvements (native file picker, warning notifications and a new settings menu) along with some bug fixes.

• Use OS native file dialogs (instead of cross-platform unified VisUI FileChooser).
• A brand new settings dialog uniting several specific feature configuration dialogs. Also includes more friendly tools to deal with custom hotkeys.
• Explicit packing warning notifications. #131
• Simplified Chinese localization. Thanks to @ZhReimu. #127
• Fixed pack clone dialog OK button crashes the app. #130
• Fixed "Legacy format" and "Pretty print" pack settings are not getting saved. Thanks to @Frosty-J. #132
• Fixed changing the app language to Chinese (either simplified of traditional has no effect. Thanks to @Frosty-J. #133
• Fixed anim8-gdx png compression always uses "Scatter" dithering algorithm and ignores the user selected one.

A hotfix release for the critically unstable 4.10.1 version.

• Fixed cannot change current atlas by clicking on pack list items. #122
• Fixed ninepatch images (".9.png" extension) are being ignored and packed as plain regions.
• Fixed pixel interpolation type is ignored for scale factors less than one.
• Possible fix for the "No default view controller found" rare crash during application startup. #92

FYI This release has a major regression bug! Please consider switching to the previous release - 4.10.0 until the patched version is available (later this month).

Bug description: You cannot change current atlas by clicking on pack list items. #122

This release focuses on general stability and minor UI improvements. It also introduces macOS M1 support!

• Fixed file path editing in file chooser dialog may result in a crash. #98
• Support for macOS arm64 (M1 chip). #110
• Added option to append input file extensions to region names. #108
• Window validates its size and location on startup. #113
• Fixed rare crash when the downloaded extension cache index is malformed. #100
• Minor UI improvements and some essential call to action views for newcomers.
• Smaller OS-specific distribution size (due to natives strip).

Along with many fixes, the new release brings an exciting feature - support for Basis Universal supercompressed GPU textures as an export file type. Be sure to check it out.

• Support for Basis Universal super-compressed atlas textures. See https://github.com/BinomialLLC/basis_universal
• Support for the new (LibGDX 1.9.13) texture atlas format. Which outputs much smaller data files.
• The app now forbids writing output atlas files to any directory matching the input files/dirs to avoid accidental source image files rewrite.
• Old PNG8 compression is replaced with anim8-gdx implementation. See https://github.com/tommyettinger/anim8-gdx.
• General project save/load errors now gracefully handled and a crash log is available.
• Fixed the main application window sometimes doesn't appear on startup on macOS devices.
• Fixed KTX(ETC1/ETC2) compression fails with NPE.
• Fixed crash when a project fails to load on startup.
• Fixed the input file absolute path sometimes is displayed wrong when the project is saved to a deeper directory hierarchy than the source images.
• Fixed the app freezes during the packing process on macOS.

• JRE 8+ is required to run the app.
• Migrated to LWJGL3 desktop backend. Expect lots of compatibility fixes.
• Simplified drag-n-drop. No visible overlay during the file drag action anymore.
• Pngquant (Imagequant) added as a PNG compression option.
• Show atlas region size on preview hover.
• Highlight a related atlas region on input file list mouse hover.
• startOnFirstThread JVM argument is no longer required on MacOS.
• Linux DEB & RPM distribution packages.
• Fixed high DPI scaling issue.
• Fixed file based 9-patch pad values get displayed wrong (in case they are not defined explicitly in the input image).
• Fixed startup crash when an installed module's local files deleted on the file system.

• Fixed high DPI scaling issue.
• Fixed file based 9-patch pad values get displayed wrong (in case they are not defined explicitly in the input image).

Hotfix release (4.8.0 packing is broken).

• Fixed texture regions get written with wrong padding.
• Fixed texture unpacker extracts regions with wrong size occasionally.

• Atlases can be saved as indexed-mode PNG8 image (compression type). Thanks to @tommyettinger
• Asynchronous (non blocking) page preview loading.
• Multiple of four page size option added.
• Menu bar items (File, Pack, Tools, Help) have got appropriate key shortcuts (ALT+F/P/T/H).
• Fixed new version notification occasionally leads to a crash.
• Fixed programmatic 9-patch pad values are omitted if they are all zero.
• Fixed 9-patch editor crashes when all patch/content points at the same corner.
• Fixed 9-patch editor writes file based images (*.9.png extension) with black stroke visual artifacts.
• Fixed global settings section values get reset upon UI reload (e.g. language change).
• Fixed global keyboard shortcuts no longer works when there is a modal dialog shown.
• Fixed exclude files do not work when are under input dir with recursive option enabled.