NAS
From Just Solve the File Format Problem
(Difference between revisions)
(Created page with "{{FormatInfo |formattype=electronic |subcat=Graphics |extensions={{ext|nas}} }} A '''.NAS''' file is a compressed paletted image archive format. The format appears to be prop...") |
m |
||
| Line 18: | Line 18: | ||
The **NB** chunk contains image data and has the following format: | The **NB** chunk contains image data and has the following format: | ||
| − | + | * Signature (<code>ND</code>) | |
| − | + | * Image width (''short'') | |
| − | + | * Image height (''short'') | |
| − | + | * ''Unknown 1'' (''short'') — usually 0 or 1 | |
| − | + | * ''Unknown 2'' (''short'') — always 0 | |
| − | + | * ''Unknown 3'' (''short'') — always 1 | |
| − | + | * Length of data (''int'') | |
| − | + | * Image data | |
The image data is compressed and the method is unknown. | The image data is compressed and the method is unknown. | ||
Revision as of 22:25, 26 November 2022
A .NAS file is a compressed paletted image archive format. The format appears to be proprietary and specific to the Bunny Pro. Das2 visual novel software for Windows.
Specification
- This format has the signature
4E 41 00 00 - Payload-size (int)
- A fixed-size palette of 256 entries totalling 768 bytes. Each entry is a 3-byte tuple for the red, blue and green component. (Most images do not use all 256 entries but the palette is always 768 bytes)
- A series of chunks, either starting with the bytes
ADorNB. Most images only have a singleNBchunk.
NB chunk
The **NB** chunk contains image data and has the following format:
- Signature (
ND) - Image width (short)
- Image height (short)
- Unknown 1 (short) — usually 0 or 1
- Unknown 2 (short) — always 0
- Unknown 3 (short) — always 1
- Length of data (int)
- Image data
The image data is compressed and the method is unknown.
AD chunk
The format of this chunk is unknown:
- Signature (
AD) - Data (362 bytes)
