RDIB

RDIB (or RIFF DIB) is a raster image file format based on RIFF and BMP. There are two varieties: "simple RDIB", which is a standard BMP file in a RIFF container, and "extended RDIB", which is more complex.

Identification
Files begin with bytes.

Specifications

 * RDIB is defined in the RIFF specifications.

Sample files

 * https://telparia.com/fileFormatSamples/archive/riffRDIB/