aseprite/docs/files/picpro.txt

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PIC(PRO) Format
Intel byte order
Information from File Format List 2.0 by Max Maischein.
--------!-CONTACT_INFO----------------------
If you notice any mistakes or omissions, please let me know! It is only
with YOUR help that the list can continue to grow. Please send
all changes to me rather than distributing a modified version of the list.
This file has been authored in the style of the INTERxxy.* file list
by Ralf Brown, and uses almost the same format.
Please read the file FILEFMTS.1ST before asking me any questions. You may find
that they have already been addressed.
Max Maischein
Max Maischein, 2:244/1106.17
Max_Maischein@spam.fido.de
corion@informatik.uni-frankfurt.de
Corion on #coders@IRC
--------!-DISCLAIMER------------------------
DISCLAIMER: THIS MATERIAL IS PROVIDED "AS IS". I verify the information
contained in this list to the best of my ability, but I cannot be held
responsible for any problems caused by use or misuse of the information,
especially for those file formats foreign to the PC, like AMIGA or SUN file
formats. If an information it is marked "guesswork" or undocumented, you
should check it carefully to make sure your program will not break with
an unexpected value (and please let me know whether or not it works
the same way).
Information marked with "???" is known to be incomplete or guesswork.
Some file formats were not released by their creators, others are regarded
as proprietary, which means that if your programs deal with them, you might
be looking for trouble. I don't care about this.
--------------------------------------------
This format description applies to both PIC and MSK files created with the
Autodesk Animator Pro package. The file begins with a 64-byte header defined
as follows:
Offset Length Name Description
0000h 1 dword The size of the whole file including the size
of this header.
0004h 1 word ID=9500h
0006h 1 word Width of the image
0008h 1 word Height of the image
000Ah 1 word X offset of image
000Ch 1 word Y offset of image
000Eh 1 dword User ID, set to zero
0012h 1 byte Bits per pixel (8 for PIC, 1 for MSK)
0013h 45 byte reserved (0)
Following the file header are the data blocks for the image. Each data block
within a PIC or MSK file is formatted as follows:
OFFSET Count TYPE Description
0000h 1 dword The size of the block, including this header.
0004h 1 word Data type ID :
0 - Color palette info
1 - Byte-per-pixel image data
2 - Bit-per-pixel mask data
0006h ? byte Data
The type values in the block headers indicate what type of graphics data the
block contains.
In a PIC_CMAP block, the first 2-byte word is a version code;
currently this is set to zero. Following the version word are all 256 palette
entries in rgb order. Each of the r, g, and b components is a single byte in the
range of 0-255. This type of block appears in PIC files; there will generally be
no color map block in a MSK file.
In a PIC_BYTEPIXELS block, the image data appears immediately following the
6-byte block header. The data is stored as one byte per pixel, in left-to-right,
topD to-bottom sequence.
In a PIC_BITPIXELS block, the bitmap data appears immediately following the
6-byte block header. The data is stored as bits packed into bytes such that the
leftmost bits appear in the high-order positions of each byte. The bits are
stored in left-to-right, top-to bottom sequence. When the width of the bitmap is
not a multiple of 8, there will be unused bits in the low order positions of the
last byte on each line. The number of bytes per line is ((width+7)/8). This type
of block appears in MSK files.
EXTENSION:PIC,MSK
OCCURENCES:PC
PROGRAMS:Autodesk Animator Pro
REFERENCE:
SEE ALSO:PIC,FLT