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Structure (In Order):
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    -- File Header (14 bytes)
    -- Information Header (40 Bytes)
    -- Palette (If the image is indexed colour)
    -- Image Data


The following will be assumed in the case of:
short int = 2 bytes (16 bits)
int = 4 bytes (32 bits)
long int = 8 bytes (64 bits)

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File Header:
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typedef struct{
    unsigned short int type; //Magic identifier = 0x4D42 (In hex notation)
    unsigned int size; //File size in bytes
    unsigned short int reserved1, reserved2; //Always 0
    unsigned int offset; //Offset to image data in bytes
    //offset = FILEHEADERSIZE (14)+INFORMATIONHEADERSIZE (40) + (4* informationheader.ncolours)
}FILEHEADER;

Structure might be padded with 2-6 bytes - might unalign fread

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Information Header:
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typedef struct{
    unsigned int size; //Header size in bytes
    int width, height; //Width and height of image
    unsigned short int planes; //Number of colour planes
    unsigned short int bits; //Bits per pixel (Can be 1, 4, 8, 24)
    unsigned int compression; //Compression type
    unsigned int imagesize; //Image size in bytes
    int xresolution,yresolution; //Pixel per meter
    unsigned int ncolours; //Number of colours
    unsigned int importantcolours; //Important colours


}INFOHEADER;



Compression types:
   0 - No Compression
   1 - 8 bit run length encoding
   2 - 4 bit run length encoding
   3 - RGB bitmap with mask


24 bit Image Data:
   - BGR (Instead of RGB)
   - 3 bytes (8*3=24) per pixel

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