WARD: WARD 'Aint Really for Drawing

No-nonsense infinite whiteboard, in the suckless tradition.

This lacks:

• multiple types of brushes.
• layers.
• save/load.
• custom palettes
• ... custom anything, really.
• mouse support.

This features:

• Rock solid framerate.
• Infinite undo/redo.
• infinite whiteboard with panning.
• Wacom tablet pressure sensitive drawing.
• quick minimap view to view the entire whiteboard at a glance.
• Not written using web tech: ~800 lines of readable c++ code.
• grid background
• Draw points with a fixed time lag, then interpolate thickness of the line from 0 to how wide it should be, offset from the time lag.
• Take a rolling average both backwards and fowards.

shortcuts:

• Q: undo
• W: redo
• E: toggle E raser
• R: R otate to next color.
• lower wacom button + drag: pan.
• upper wacom button: toggle overview. Tap to move to a location in the overview. Tap upper button in overview mode to quit overview without moving.
• Color selection: hover pointer over color in color pot in color palette at bottom row.
• Eraser selection: hover pointer over eraser in color palette at bottom left.

The code uses:

• the EasyTab library to work with Wacom tablets.
• The Milton project as heavy reference on how to work with tablets.
• SDL2 for rendering.
• Cairo-gl for anti aliased vector graphics.
• Spatial hashing to quickly add and delete brush strokes.
• Lazy repainting of the entire frame upon change..
• Wishes to use FastUIDraw for an even faster backend than cairo.

Build with CMake

$ mkdir build && cd build && cmake ../ && make -j

Build with Meson

$ meson build && cd build && ninja && ./ward