home *** CD-ROM | disk | FTP | other *** search
- Animated bitmap form (Framer, Deluxe Video)
-
- TITLE: Form ANBM (animated bitmap form used by Framer, Deluxe Video)
-
- (note from the author)
-
- The format was designed for simplicity at a time when the IFF
- standard was very new and strange to us all. It was not designed
- to be a general purpose animation format. It was intended to be
- a private format for use by DVideo, with the hope that a more
- powerful format would emerge as the Amiga became more popular.
-
- I hope you will publish this format so that other formats will
- not inadvertantly conflict with it.
-
- PURPOSE: To define simple animated bitmaps for use in DeluxeVideo.
-
- In Deluxe Video objects appear and move in the foreground
- with a picture in the background. Objects are "small" bitmaps
- usually saved as brushes from DeluxePaint and pictures are large
- full screen bitmaps saved as files from DeluxePaint.
-
- Two new chunk headers are defined: ANBM and FSQN.
-
- An animated bitmap (ANBM) is a series of bitmaps of the same
- size and depth. Each bitmap in the series is called a frame and
- is labeled by a character, 'a b c ...' in the order they
- appear in the file.
-
- The frame sequence chunk (FSQN) specifies the playback
- sequence of the individual bitmaps to achieve animation.
- FSQN_CYCLE and FSQN_TOFRO specify two algorithmic sequences. If
- neither of these bits is set, an arbitrary sequence can be used
- instead.
-
-
- ANBM - identifies this file as an animated bitmap
- .FSQN - playback sequence information
- .LIST ILBM - LIST allows following ILBMs to share properties
- ..PROP ILBM - properties follow
- ...BMHD - bitmap header defines common size and depth
- ...CMAP - colormap defines common colors
- ..FORM ILBM - first frame follows
- ..BODY - the first frame
- . - FORM ILBM and BODY for each remaining frame
- .
- .
-
- Chunk Description:
-
- The ANBM chunk identifes this file as an animated bitmap
-
- Chunk Spec:
-
- #define ANBM MakeID('A','N','B','M')
-
- Disk record:
-
- none
-
- Chunk Description:
-
- The FSQN chunk specifies the frame playback sequence
-
- Chunk Spec:
-
- #define FSQN MakeID('F','S','Q','N')
-
- /* Flags */
- #define FSQN_CYCLE 0x0001 /* Ignore sequence, cycle a,b,..y,z,a,b,.. */
- #define FSQN_TOFRO 0x0002 /* Ignore sequence, cycle a,b,..y,z,y,..a,b, */
- /* Disk record */
- typedef struct {
- WORD numframes; /* Number of frames in the sequence */
- LONG dt; /* Nominal time between frames in jiffies */
- WORDBITS flags; /* Bits modify behavior of the animation */
- UBYTE sequence[80]; /* string of 'a'..'z' specifying sequence */
- } FrameSeqn;
-
-
- Supporting Software:
-
- DeluxeVideo by Mike Posehn and Tom Case for Electronic Arts
-
-
- Thanks,
- Mike Posehn
-