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- --------I-BMP-------------------------------
-
- The BMP files are the way, Windows stores bit mapped images. The BMP
- image data is bit packed but every line must end on a dword boundary -
- if thats not the case, it must be padded with zeroes. BMP files are
- stored bottom-up, that means that the first scan line is the bottom
- line. The BMP format has four incarnations, two under Windows (new and
- old) and two under OS/2, all are described here.
-
- OFFSET Count TYPE Description
- 0000h 2 char ID='BM' - BitMap
- OS/2 also supports the following IDs :
- ID='BA' - Bitmap Array
- ID='CI' - Color Icon
- ID='CP' - Color Pointer (mouse cursor)
- ID='IC' - Icon
- ID='PT' - Pointer (mouse cursor)
- 0002h 1 dword Filesize of whole file
- 0006h 4 byte reserved
- 000Ah 1 dword Offset of bitmap in file
- ="BOF"
- 000Eh 1 dword Length of BitMapInfoHeader
- The BitMapInfoHeader starts directly after
- this header.
- 12 - OS/2 1.x format
- 40 - Windows 3.x format
- 64 - OS/2 2.x format
- 0012h 1 dword Horizontal width of bitmap in pixels
- 0016h 1 dword Vertical width of bitmap in pixels
- 001Ah 1 word Number of planes
- 001Ch 1 word Bits per pixel ( thus the number of colors )
- ="BPP"
- 001Eh 1 dword Compression type, see ALGRTHMS.txt for descrip-
- tion of the different types
- 0 - none
- 1 - RLE 8-bit/Pixel
- 2 - RLE 4-bit/Pixel
- 0022h 1 dword Size of picture in bytes
- 0026h 1 dword Horizontal resolution
- 002Ah 1 dword Vertical resolution
- 002Ah 1 dword Number of used colors
- 002Ah 1 dword Number of important colors
- 0036h ? rec Definition of N colors
- N=1 shl "BPP"
- 1 byte Blue component
- 1 byte Green component
- 1 byte Red component
- 1 byte Filler
- "BOF" ? byte Image data
- EXTENSION:BMP,RLE,LGO
- OCCURENCES:PC
- PROGRAMS:Windows,Paintbrush
- REFERENCE:DDJ0994
- VALIDATION:
- SEE ALSO:rDIB
-