SnapPin

SnapPin is a free and open-source Windows screenshot, annotation, and pin utility built for fast keyboard/mouse workflows.

Features

• Static capture with frozen-frame visual pause
• Dimmed mask with selection highlight
• Auto window hover selection and drag region selection
• Post-capture toolbar actions: Copy, Save, Pin, Mark, OCR, Close
• Annotation editor baseline: Rect, Ellipse, Line, Polyline, Arrow, Serial, Mosaic, Blur, Eraser, Highlighter, Spotlight, Watermark, Magnifier, Pencil, Text, Undo/Redo, range reselect
• OCR baseline for active artifacts, selected OCR regions, and focused image pins using the Windows system OCR engine, with clipboard copy, auto-selected selectable result window, and tray feedback
• Multi-pin image windows with close/destroy lifecycle actions and clipboard text/LaTeX-like pin fallback
• Tray-resident single-instance app

Detailed progress and reference parity tracking: docs/Implementation-Status.md.

Build

Requirements:

• Windows 10/11
• Visual Studio 2022 Build Tools (MSVC v143)
• CMake 3.24+
• Ninja

Configure:

cmake -S . -B "build/MSVC v143 x64 (vcvars64 + Ninja)-Release" -G Ninja -DCMAKE_BUILD_TYPE=Release

Build:

cmake --build "build/MSVC v143 x64 (vcvars64 + Ninja)-Release" --config Release --target all --

Run:

.\build\MSVC v143 x64 (vcvars64 + Ninja)-Release\bin\snappin.exe

Project layout

src/
  app/       app wiring, actions, tray, runtime services
  ui/        overlay, toolbar, settings, annotate, pin windows
  capture/   capture backends and service interface
  export/    clipboard and file export
  core/      shared types and contracts
tests/
docs/

Specs and Design

• Active spec index: docs/specs/00_overview.md
• OCR spec: docs/specs/dev_ocr.md
• Parity and scope matrix: docs/specs/matrix_reference_parity.md
• Integration checklist: docs/specs/integration_validation.md
• Architecture: docs/design/system_architecture.md
• Tradeoffs: docs/tradeoffs.md
• Legacy spec snapshot: docs/specs/legacy/

License

MIT