Infiquill

An infinite-canvas drawing app for pen tablets on Wayland, built with Rust (winit + wgpu + octotablet). Pen pressure maps to stroke width, the canvas pans and zooms without bounds, and everything persists to a single file.

Features

• Pressure-sensitive pen strokes with smooth ribbon tessellation
• Infinite pan/zoom at the cursor, zoom range 1e-12 to 1e12
• Named bookmarks: B saves the current view (world center + zoom relative to the window width) with a custom name, G opens a fuzzy finder to jump back — the view centers and fills the same fraction at any window size
• Eraser tool with ink-distance hit testing
• Fill tool (f): click inside any enclosed region bounded by stroke ink to fill it. The region is found vectorially — nearby strokes (quadtree search, starting close and expanding, scale-filtered to the current zoom) are split at their intersections and the click's face is traced through the connection graph, so a click between two nested circles fills the ring with the inner circle cut out. Clicking an existing fill removes it. Fills stay associated with the strokes that bound them: erasing or deleting a boundary stroke removes the fill, and pin-editing a boundary stroke refills the shape on release (recomputing connectedness — a stroke dragged off so the loop breaks removes the fill)
• Marquee selection, move tool, and local copy/paste of selections
• Themed colors from a JSON config
• Autosave (debounced) plus save on exit, atomic writes
• Line rider: press L to drop a sled-and-rider character at the cursor that rides your strokes (gravity only, no line friction) while the camera follows; L again restores the previous view

Build and run

With the nix flake:

nix run          # run the packaged app
nix build        # build the binary (result/bin/infiquill)
nix develop      # dev shell with cargo, rustc, rust-analyzer

Without nix, cargo run works; the winit/wgpu runtime needs Wayland and Vulkan libraries on LD_LIBRARY_PATH.

Data and config

• Document: $XDG_CONFIG_HOME/infiniquill/notes.iniq (override with INFIQUILL_FILE). On a non-master git branch the file is notes.<branch>.iniq so feature-branch runs never touch the canonical document; saves back up the previous file to notes.iniq.bak, and an unreadable document is preserved as notes.iniq.corrupt instead of being overwritten
• Theme and settings: $XDG_CONFIG_HOME/infiniquill/config.json:

{
  "theme": {
    "background": "#191724",
    "foreground": "#e0def4",
    "cursor": "#e0def4",
    "eraser": "#eb6f92",
    "selection": "#c4a7e7",
    "export_color": "#000000"
  }
}

  The `export_color` key sets the stroke color baked into SVG copies
  (defaults to black, independent of the theme).

UI

• Text is rendered from Mynerve (assets/Mynerve/Mynerve-Regular.ttf; override with $INFIQUILL_FONT). The glyph atlas is rasterized at the window's target text size and re-rasterized on resize, so text is pixel-crisp and scales from 720p to 4k.
• A status bar at the bottom-left fades in (0.5s) on camera actions and fades out (5s) afterwards. Panning shows the camera coordinates in shorthand (x 1.23k y 4.5M), updated per frame; zooming shows the level (125%). New events appear at the anchor and bump older ones up.

Keybinds

Key	Action
Pen contact	Draw (pressure maps to width)
Space (held) + pen	Pan the canvas; coasts on release
Shift (held) + pen	Zoom in/out anchored at the pen
Middle mouse drag	Pan
0	Center on origin; press again quickly to reset zoom to 1.0
Ctrl+Z	Undo
Ctrl+Shift+Z / Ctrl+Y	Redo
[ / ]	Pen size smaller / larger
f	Toggle fill tool (click inside an enclosed region to fill; click a fill to remove it)
v / d	Toggle move tool. With an empty selection, every stroke shows three grab pins (start / mid-arc / end); dragging one bends the stroke smoothly between the anchors (one undo step per drag). Alt+drag an end pin locks it to the stroke's original axis — pure stretch/shrink, no rotation. With a marquee selection, drags translate the group
Ctrl+C	Copy the selected strokes to the clipboard (viewport-relative; paste scales with the current zoom)
Ctrl+Shift+C	Copy the selected strokes as SVG (viewBox = the current window view)
Ctrl+X	Cut the selected strokes and images (one undo step)
Ctrl+V	Paste (our stroke text, a system image, or the local selection)
Delete	Delete the selected strokes and images
B	Bookmark the current view (location + zoom) with a custom name
G	Fuzzy-find saved bookmarks; Up/Down select, Enter jumps, Esc closes
Escape	Save and quit

License

Infiquill is licensed under the GNU Affero General Public License v3.0 (see LICENSE.md). The line-rider character sprites in assets/rider/ are copied from the GPL-3.0 project linerider-advanced; see THIRD_PARTY.md for attribution and compatibility notes.