Format Of Sprite Area
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ยป Format Of Sprite Area
Format Of Sprite Area
Sprite areas have a fixed size-header followed by an optional extension area, and then a number of sprites.
Header format
Sprite area headers are 16 bytes long, with the following format.
| Offset | Content |
|---|---|
| +0 | Size of sprite area |
| +4 | Number of sprites in area |
| +8 | Offset to first sprite (16+) |
| +12 | Offset to first free word in area (i.e. after last sprite) |
| +16 | Optional Sprite Extension Area (if offset to first > 16) |
The sprite area size is measured in bytes including the 16 byte header, and must be a multiple of four.
All offsets are in bytes, relative to the start of the sprite area, and are always word aligned.
To create a valid empty sprite area, the header should be filled in as follows:
| Offset | Content |
|---|---|
| +0 | Size of sprite area buffer |
| +4 | 0 |
| +8 | 16 |
| +12 | 16 |
See also
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