Compressed Matte Atoms
The compressed matte atom specifies the image description structure associated with a particular matte atom. The layout of the compressed matte atom is shown in Figure 4-14.You define a compressed matte atom by specifying these elements:
- Size. A long integer that indicates the number of bytes in this compressed matte atom.
- Type. A long integer that indicates the type of the data in this atom (defined by the
'kmat'atom type).- Version. A 1-byte specification of the version of this compressed matte atom.
- Flags. Three bytes of space for future flags associated with this compressed matte atom.
- Matte image description. An image description structure of variable length and associated with this matte data. See the chapter "Image Compression Manager" in this book for details on the image description structure.
- Matte data. The compressed matte data, which is of variable length.