ID, mainly used as a padding and secondary identification
Sets the maximum accessable color amount by the bitmap. By default, for 4 bit bitmaps, it's 4, and it enables 256 * 16 color palettes. This limitation is due to the way how the MappingElement struct works. 8 bit bitmaps can assess the full 256 * 256 palette space. Lower values can be described to avoid wasting palettes space in cases when the bitmaps wouldn't use their full capability. Not used with 16 bit indexed and 32 bit direct color bitmaps.
Used for quicker access to the Data
Padding for 32 bit
For reference counting