Ace Film
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Ace Film is an animation file format used on early RISC OS systems (file type D6A, AceFilm), allowing graphics created using Ace Computing's applications to be stored as a series of frames in a file, to be replayed layer using the Projector application. Applications used to generate Ace Film files included Tween, Mogul and [[Euclid (Ace Computing)|Euclid]]. | Ace Film is an animation file format used on early RISC OS systems (file type D6A, AceFilm), allowing graphics created using Ace Computing's applications to be stored as a series of frames in a file, to be replayed layer using the Projector application. Applications used to generate Ace Film files included Tween, Mogul and [[Euclid (Ace Computing)|Euclid]]. | ||
| + | |||
| + | == Notes == | ||
| + | |||
| + | All lengths and offsets are in bytes. Words are 4 bytes. | ||
| + | |||
| + | 0x0: File length (4 bytes) | ||
| + | 0x4: Title (12 bytes, ASCII, low bytes ignored, can contain spaces) | ||
| + | 0x10: Offset into the file of data (data_offset) | ||
| + | 0x14: | ||
| + | 0x18: | ||
| + | 0x1c: Number of colours? | ||
| + | |||
| + | Each frame is described by a data length followed by the data itself, then | ||
| + | followed by the data length again, presumably to make it easy to traverse the | ||
| + | file in both directions: | ||
| + | |||
| + | data_offset: length of data (including this word) (data_length) | ||
| + | ... | ||
| + | data_offset + data_length - 4: data_length | ||
== References == | == References == | ||
Revision as of 02:47, 19 November 2012
Overview
Ace Film is an animation file format used on early RISC OS systems (file type D6A, AceFilm), allowing graphics created using Ace Computing's applications to be stored as a series of frames in a file, to be replayed layer using the Projector application. Applications used to generate Ace Film files included Tween, Mogul and Euclid.
Notes
All lengths and offsets are in bytes. Words are 4 bytes.
0x0: File length (4 bytes) 0x4: Title (12 bytes, ASCII, low bytes ignored, can contain spaces) 0x10: Offset into the file of data (data_offset) 0x14: 0x18: 0x1c: Number of colours?
Each frame is described by a data length followed by the data itself, then followed by the data length again, presumably to make it easy to traverse the file in both directions:
data_offset: length of data (including this word) (data_length) ... data_offset + data_length - 4: data_length
