Format
Dr. Halo Image Palette
Summary
- Name
- Dr. Halo Image Palette
- Identifiers
- PUID: fmt/1186
- Format type
- Image (Raster)
- Description
- The Dr. Halo Image Palette stores colour palette information for the Dr. Halo Image Data format. Having a separate colour palette file aloows the ability to change the stored colours of an image without re-encoding the image data.
- File extensions
-
pal - Submitted by
- Digital Preservation Department / The National Archives
Internal signatures
Dr. Halo Image Palette
- Description
- BOF: 'AH'{4} 0x0A00
- Provenance
- Note, bytes 0x0F, 0x11, and 0x13 are likely to always be 00 as according to the file structure described here: http://www.fileformat.info/format/drhalo/egff.htm, each represents the larger half of a 32 bit (WORD) value representing a value that can only have up to 256 values - MaxRed, MaxGreen, MaxBlue, e.g. FF00 = 256. This could be used to strengthen the signature in the event of accidental clashes
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
4148{4}0A00- Endianness
- None
Changelog
-
V94
- Release date
- 17 September 2018
-
Added format
Dr. Halo Image Palette: Full entry added.
-
Added signature
Dr. Halo Image Palette: Signature developed through PRONOM Research.