Bitmap Image file format explained

Bitmap image format explained

Data (Hex)		Meaning		Size(Bytes)	Ascii	Notes
41 69 00 00		FooBar		4			Hi		(this says "Hi")

	Header:
42 4d			Signature	2	BM	(always BM)
4e 00 00 00		FileSize	4	78	(in bytes)
00 00 00 00		reserved	4	unused	(always 0)
36 00 00 00		DataOffset	4	54	(Offset from beginning of file to the beginning of the bitmap data)

	InfoHeader:
28 00 00 00		InfoSize	4	40	(almost always 40)
08 00 00 00		Width		4	8
01 00 00 00		Height		4	1
01 00			Planes		2	1	(almost always 1)
18 00			bits/pixel	2	24	(almost always 24)
00 00 00 00		Compression	4	0
00 00 00 00		ImageSize	4	0	(0 is valid iff bits/pixel = 24)
00 00 00 00		XpixelsPerM	4	0	(rarely used)
00 00 00 00		YpixelsPerM	4	0	(rarely used)
00 00 00 00		ColsUsed	4	0	(only used if bits/pixel != 24)
00 00 00 00		ImportantCols	4	0	(only used if bits/pixel != 24)

	PixelData:
ff ff ff		R G B  [0]
ff ff ff		R G B  [1]
ff ff ff		R G B  [2]
ff ff ff		R G B [...]
ff ff ff
ff ff ff
ff ff ff
ff ff ff



	Uncommented:
42 4d
4e 00 00 00
00 00 00 00
36 00 00 00

28 00 00 00
08 00 00 00
01 00 00 00
01 00 18 00
00 00 00 00
00 00 00 00
00 00 00 00
00 00 00 00
00 00 00 00
00 00 00 00

ff ff ff
ff ff ff
ff ff ff
ff ff ff
ff ff ff
ff ff ff
ff ff ff
ff ff ff