The Bitmap (BMP) Image File Format

Offset	Name	Definition	Size	Value	Hex Bytes
The File Header (BITMAPFILEHEADER)
0	File Type	This contains the letters "BM" to indicate the main file format.	2	BM	42 4d
2	Size	The size of the bitmap file in bytes.	4	??	?? ?? ?? ??
6	Reserved 1	This must be zero.	2	0	00 00
8	Reserved 2	This must be zero.	2	0	00 00
10	Pixel Offset	The byte offset of the pixel data in the file.	4	?	?? ?? ?? ??
The Image Header (BITMAPINFOHEADER)
14	Size	This is size of BITMAPINFOHEADER.	4	40	28 00 00 00
18	Width	The width of the bitmap in pixels.	4	150	96 00 00 00
22	Height	The height of the bitmap in pixels.	4	100	64 00 00 00
26	Planes	The planes of the target device, must be 1.	2	1	01 00
28	Bit Count	The number of bits per pixels.	2	24	18 00
30	Compression	Values: BI_RGB, BI_RLE8, BI_RLE4, BI_BITFIELDS, BI_JPEG, BI_PNG	4	0	00 00 00 00
34	Image Size	The size of the image in bytes, may be zero for BI_RGB.	4	45,200	90 b0 00 00
38	X Pels Per Meter	The horizontal pixels per meter.	4	0	00 00 00 00
42	Y Pels Per Meter	The vertical pixels per meter.	4	0	00 00 00 00
46	Colors Used	The number of colors used, zero if all colors are used.	4	0	00 00 00 00
50	Colors Important	The number of colors required, zero if all colors are requuired.	4	0	00 00 00 00
The Pixel Data Portion
54	Data	For 32 bit pixels, each dword is a pixel.	??	5924 \| ...	24 17 \| ...