Parallaction/Formats

From ScummVM

All values are little endian for DOS version.

Big Red Adventure (DOS)

Graphics for backgrounds (BKG), splash screens (BMP) and items (RAS):

Offset	Size	Description
0000h	4	Signature (0 for RAS/BMP, 59A66A95h for BKG).
0004h	4	Image width.
0008h	4	Image height.
000Ch	4	Unused.
0010h	4	Unused.
0014h	4	Unused.
0018h	4	Unused.
001Ch	4	Unused.
0020h	768	256 colors palette entries in RRRRR.....GGGGG.....BBBBB.... format.
0320h	width * height	Uncompressed raw bitmap data.

Graphics file for animations (ANI), dialogues (TAL) and menu items (WIN) contain multiple frames packed with a RLE variant. The first word (2 bytes) in the file holds the number of frames stored. The format of each frame follows:

Offset	Size	Description
0000h	2	Compressed data size.
0002h	2	Image X. Used for in game positioning, since frames from the same animation may have different sizes.
0004h	2	Image Y. Used for in game positioning, since frames from the same animation may have different sizes.
0006h	2	Image width.
0008h	2	Image height.
000Ah	see field at offset 0	Compressed data.

Font (FNT) and inventory icons (ICO), referred as glyphs, and stored with the following format:

Offset	Size	Description
0000h	4	Glyphs #
0004h	Glyphs #	Width of each glyph.
0004h + Glyphs #	1	Glyphs height.
0005h + Glyphs #	(Sum of widths) * glyphs # * height	Uncompressed raw data.