IFF
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IFF (Interchange File Format) is a format developed by electronic arts in the 80's. It is the predominant format on the Amiga computer. It is a chunked format. It can be used to store any type of data, but it is predominantly used to store images, animations and audio.
IFF chunks are always padded to an even number of bytes.
ILBM FOURCC
Images are stored in planes. So, to get a pixels color value you need to combine the bits from each frame to create a color register index.
/* ---------- BitMapHeader ---------------------------------------------*/ /* Required Bitmap header (BMHD) structure describes an ILBM */ typedef struct { uint16_t w; /* raster width in pixels */ uint16_t h; /* raster height in pixels */ int16_t x; /* x offset in pixels */ int16_t y; /* y offset in pixels */ uint8_t nplanes; /* # source bitplanes */ uint8_t masking; /* masking technique */ uint8_t compression; /* compression algoithm */ uint8_t pad1; /* UNUSED. For consistency, put 0 here. */ uint16_t transparentColor; /* transparent "color number" */ uint8_t xaspect; /* aspect ratio, a rational number x/y */ uint8_t yaspect; /* aspect ratio, a rational number x/y */ int16_t pagewidth; /* source "page" size in pixels */ int16_t pageheight; /* source "page" size in pixels */ } BitMapHeader;
List Of Chunk FOURCCs
Note: an underscore (_) is used to indicate the space character.
- 16SV
- 8SVX
- ANFI
- ANHD ( ANIM Frame )
- ANIM
- ANNO
- ANSQ
- ATAK
- AUTH
- BMHD
- BODY
- CAMG
- CCRT (Graphicraft cycling chunk)
- CHAN
- CMAP (Color Map is a packed array of ColorRegisters )
- (c)_
- CRNG
- DEST
- DLTA
- DPAN (Deluxe Paint Anim Chunk)
- DPI_
- DPPS
- DPPV
- DRNG
- FACE
- FADE
- FORM
- FVER
- GRAB
- ILBM
- INS1
- IMRT
- JUNK
- LIST
- MHDR
- NAME
- PAN_
- PROP
- RLSE
- SAMP
- SEQN
- SHDR
- SMUS
- SPRT
- TEXT
- TINY
- TRAK
- VHDR