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Update docs for DC-1 testing, fix toolbar clipping

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- Updated DESIGN.md: rendering strategy (no backing bitmap, screen-space
  grid, viewport clamping), added line snap and box tool documentation
- Updated PROGRESS.md: DC-1 testing results and fixes applied
- Updated CLAUDE.md: key conventions for rendering
- Fix toolbar overlap: use clipToBounds on canvas AndroidView to prevent
  it from drawing over the toolbar area

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Kyle Isom
2026-03-24 15:13:25 -07:00
parent 2b567aa038
commit 85a210c001
4 changed files with 66 additions and 23 deletions
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7
CLAUDE.md
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@@ -81,7 +81,10 @@ eng-pad/
- Stroke points are packed as little-endian float BLOBs: `[x0,y0,x1,y1,...]`
- All coordinates are in canonical space (300 DPI). Screen transform via `Matrix`.
- Grid spacing: 60pt (~5 squares/inch). Grid is drawn on screen, excluded from exports.
- Grid drawn in **screen space** with pixel-snapped positions (not canonical space) for uniform squares.
- Pen widths: 0.38mm = 4.49pt, 0.5mm = 5.91pt (at 300 DPI).
- Two pen sizes only, no pressure sensitivity.
- Anti-aliasing disabled on all paint objects for crisp e-ink rendering.
- No backing bitmap — strokes draw directly as paths.
- Viewport: page always fills screen, pan clamped to edges, dynamic min zoom.
- Line snap: hold pen still 1.5s to snap to straight line (60pt movement threshold).
- Hardware palm rejection only (EMR digitizer).