A TI Picture variable is encoded as a packed bitmap, and is always 128x63 binary pixels.

A blank (all zero) bitmap

Create a bitmap from a packed ByteString. If the data is the wrong size, returns Nothing.

Extract the raw ByteString from a bitmap.

Create a text-based representation of a picture. Background pixels are rendered as spaces, while foreground are rendered as full block glyphs (█).

Save a bitmap as a PNG image. Bits are mapped to pixels using a vaguely calculator-like color map (light gray background, dark gray foreground).