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  Tachikoma v2.0.0 Stable

  kahliburke released this 2026-03-25 01:27:38 -07:00 | 47 commits to main since this release

  Tachikoma v2.0.0

  A major release bringing a complete RGBA pixel pipeline, type-safe widget styling, and sixel compositing with text preservation.

  Breaking Changes

  Widget Styling System

  TabBar and Button now use type-parameterized decoration styles instead of keyword arguments:

  # TabBar: BracketTabs (default), BoxTabs, PlainTabs
  TabBar(["Tab 1", "Tab 2"]; tab_style=TabBarStyle(decoration=BoxTabs(box=BOX_HEAVY)))
  
  # Button: BracketButton (default), BorderedButton, PlainButton
  Button("Submit"; button_style=ButtonStyle(decoration=BorderedButton()))
  

  The old kwargs (style, active_style, bordered, box) are removed. This is a clean break — users subtype TabDecoration or ButtonDecoration to create custom styles with full render control.

  RGBA Pixel Pipeline

  The entire pixel pipeline now uses ColorRGBA instead of ColorRGB:

  • BLACK is ColorRGBA(0,0,0,0xff), TRANSPARENT is ColorRGBA(0,0,0,0x00)
  • encode_sixel and encode_kitty accept Matrix{ColorRGBA} — transparency is expressed through the alpha channel
  • The bg sentinel parameter is removed everywhere
  • Base.convert methods allow implicit ColorRGB → ColorRGBA assignment

  FloatingWindow on_render

  Signature changed from (inner, buf, focused) to (inner, buf, focused, frame). The frame parameter (which can be nothing) enables pixel graphics (PixelImage, kitty, sixel) inside floating windows.

  New Features

  Sixel Virtual Framebuffer Compositor

  Multiple render_rgba! calls per frame are alpha-composited into a shared framebuffer. A text mask algorithm preserves terminal text (titles, borders, labels) over pixel content by splitting sixel output into non-overlapping rectangles that avoid text cells. Transparent pixels are filled with the canvas background for flicker-free rendering.

  Kitty RGBA with Z-Index

  Native alpha channel support via f=32 with z-index layering for proper window stacking.

  ColorTypes.jl Extension

  Seamless bidirectional conversion between Tachikoma and the Colors.jl/Makie ecosystem:

  using Tachikoma, ColorTypes
  tc = to_rgb(RGB{N0f8}(1.0, 0.0, 0.0))    # ColorTypes → Tachikoma
  ct = to_colortype(ColorRGB(0xff, 0, 0))    # Tachikoma → ColorTypes
  

  Auto-activates when ColorTypes is loaded. Zero-cost if not.

  Button Flash Customization (#24)

  Custom flash animations via flash_style function and flash_frames duration on ButtonStyle. Thanks @ronisbr!

  Environment-Based Graphics Detection

  Auto-detect kitty/sixel support from TERM, TERM_PROGRAM, and other env vars — faster startup (skips 100ms probe roundtrip) and enables graphics on remote TTY sessions where escape sequence probing is unsafe. Supports kitty, Ghostty, WezTerm, iTerm2, foot, and mlterm.

  24 Built-in Themes

  11 dark + 13 light palettes with light_mode() / set_light_mode!() and per-theme canvas background colors.

  Lifecycle Hooks

  pre_render!(model) and post_render!(model) callbacks for Revise-compatible hot reloading workflows.

  Bug Fixes

  • Fix invisible cursor on light themes in terminal/REPL demos (#25). Thanks @eschnett!
  • Fix frame pacer 30fps cap with conditional take!(wake)
  • Fix flaky spawn_timer! test on slow CI runners
  • Remove Infiltrator from TachikomaDemos dependencies

  Contributors

  Thanks to @ronisbr for the button flash customization PR and @eschnett for reporting the light-mode cursor issue.

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