# ndi

iNDexed Image format - consider itself lucky.

This is the Go reference for `ndi` v1.

## Format

### Header

magic string: `ndi1`

image width: uint16

LUT/palette size: uint8 (maximum of 255 colors)

zero pad until 12 bytes

`ndi1 WWL0 0000`

### LUT (lookup table) / palette

3x uint8 in RGB order, per LUT index.

zero pad: 32 bits

### Pixels

a uint8 per pixel, referencing the color within the LUT, zero indexed.

## Decoding Quirks

Pixels should modulo their value with LUT size. A pixel referencing index 0xEF when only 10 colors exist in the LUT, `0xEF % 10` is the correct interpretation.