opcodes.txt

FIF is a bytecode virtual machine based image codec.
EVERY fif file must begin with the following ASCII string "FastIF"
The 2 bytes after FastIF define OC Resolution (Actual x = 1st byte * 2, Actual y = 2nd byte * 4)

There are the following opcodes:
    0x01 - Set background
        Arguments:
            byte - Red
            byte - Green
            byte - Blue

    0x02 - Set foreground
        Arguments:
            byte - Red
            byte - Green
            byte - Blue

    0x10 - Set line
        Arguments:
            byte - X
            byte - Y
            byte - Size

            Size*byte - Pixels to start setting starting at that position.
                Pixels are encoded using the lower byte of a UTF-8 braille character (U+2800 to U+28FF)

    0x11 - Fill
        Arguments:
            byte - X
            byte - Y
            byte - Width
            byte - Height
            byte - Lower byte of a UTF-8 braille character

    0x12 - Sleep
        Arguments:
            byte - Time * 100 (in seconds)

    0x13 - Set vertical line
        Argument:
            byte - X
            byte - Y
            byte - Size

            Size*byte - Pixels to start setting starting at that position.
                Pixels are encoded using the lower byte of a UTF-8 braille character (U+2800 to U+28FF)

    0x20 - Exit execution
    
    0x40 - Decoder meta instruction
        Argument:
            8 bytes - Any data, up to the decoder to parse