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The X-Philes (2nd Revision)
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The X-Philes Number 1 (1995).iso
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bitmap.fmt
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1995-03-31
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PSIONICS FILE - BITMAP.FMT
==========================
Format of Bitmap files
Last modified 1994-04-26
========================
A bitmap file (also called a .PIC file) begins with an 8 byte header of the
following form:
Offset 0 to 2: "PIC"
Offset 3 (byte): $DC
Offset 4 (byte): format version number
Offset 5 (byte): OPL runtime version number
Offset 6 (word): number of bitmaps in the file
The format and OPL runtime version number are always $30.
This header is then followed by the appropriate number of bitmap descriptor
records. These are each 12 bytes:
Offset 0 (word): CRC of bitmap data (but not descriptor)
Offset 2 (word): width of bitmap
Offset 4 (word): height of bitmap
Offset 6 (word): size of bitmap data in bytes
Offset 8 (long): position of data relative to the end of the last record
@what does this mean ?@
The data is stored from top to bottom. Each row is rounded up to an even
number of bytes, and is stored from left to right, with bit 0 of each byte
being the leftmost pixel of the 8 represented.