About-Defining-an-Extended-Big-Font-File

About Defining an Extended Big Font File

    About Defining an Extended Big Font File

    To reduce the size of composite Kanji characters, you can define an extended Big Font
    file. Extended big fonts use the subshape code, followed immediately by a 0.

    The first line of an extended Big Font file is the same as the regular Big Font file.
    This is the format for the remaining lines of the file:

    *0,5,font-name character-height, 0, modes, character-width,0
                . 
                . 
                . 
    *shape-number,defbytes,shape-name
                . 
    code,0,primitive#,basepoint-x,basepoint-y,width,height, 
                . 
                . 
    code,0,primitive#,basepoint-x,basepoint-y,width,height, 
                . 
    terminator

    The following list describes the fields of a Big Font definition file:

    character height

    Used along with character width to indicate the number of units that define the font
    characters.

    character width

    Used along with character height to indicate the number of units that define the font
    characters. The character-height and character-width values are used to scale the primitives of the font. In this context, primitives
    are the points, lines, polygons, or character strings of the font geometrically oriented
    in 2D space. A Kanji character consists of several primitives used repeatedly in different
    scales and combinations.

    modes

    The modes byte should be 0 for a horizontally oriented font and 2 for a dual-orientation (horizontal
    or vertical) font. The special 00E (14) command code is honored only when modes is set to 2.

    shape-number

    Character code.

    defbytes

    Byte size. It is always 2 bytes, consisting of a hexadecimal or a combination of decimal
    and hexadecimal codes.

    shape-name

    Character name.

    code

    Shape description special code. It is always 7 so that it can use the subshape feature.

    primitive#

    Reference to the subshape number. It is always 2 bytes.

    basepoint-x

    X origin of the primitive.

    basepoint-y

    Y origin of the primitive.

    width

    Scale of the width of the primitive.

    height

    Scale of the height of the primitive.

    terminator

    End-of-file indicator for the shape definition. It is always 0.

    To arrive at the scale factor, the program scales down the primitive to a square unit
    and then multiplies it by the height and width to get the shape of the character.
    Character codes (shape numbers) in the Big Font shape definition file can have values
    up to 65535. The following table describes the fields of the extended Big Font file.

    Fields of the extended Big Font file

    Variable

    Value

    Byte size

    Description

    shape-number

    xxxx

    2 bytes

    Character code

    code

    7,0

    2 bytes

    Extended font definition

    primitive#

    xxxx

    2 bytes

    Refer to subshape number

    basepoint-x

     

    1 byte

    Primitive X origin

    basepoint-y

     

    1 byte

    Primitive Y origin

    width

     

    1 byte

    Scale of primitive width

    height

     

    1 byte

    Scale of primitive height

    terminator

    0

    1 byte

    End of shape definition

    The following figure is an example of a 16 x 16 dot matrix that you could use to
    design an extended Big Font, such as a Kanji character. In the example, the distance
    between each dot is one unit. The callout points to a square unit.

    A square matrix for a Kanji character

    The following figure shows examples of Kanji characters. Each character occupies an
    Mأ—N matrix (matrices don’t have to be square), similar to the one shown in the previous
    figure. The numbers above each figure are the associated shape numbers.

    Examples of Kanji characters

    The following figure shows Kanji primitives.

    Examples of Kanji primitives

    NOTE:Not all fonts are defined in a square matrix; some are defined in rectangular matrices.

    Example: Shape Definition File for an Extended Big Font

    *BIGFONT 50,1,080,09e
    *0,5,Extended Font
    15,0,2,15,0
    *08D91,31,unspecified
    2,0e,8,-7,-15,
    7,0,08cfb,0,0,16,16,7,0,08bca,2,3,12,9,
    2,8,18,0,2,0e,8,-11,-3,0
    *08CD8,31,unspecified
    2,0e,8,-7,-15,
    7,0,08be0,0,0,8,16,7,0,08cc3,8,0,8,16,
    2,8,18,0,2,0e,8,-11,-3,0
    *08ADF,31,unspecified
    2,0e,8,-7,-15,
    7,0,089a4,0,0,8,16,7,0,08cb3,8,0,8,16,
    2,8,18,0,2,0e,8,-11,-3,0
    *08CE8,39,unspecified
    2,0e,8,-7,-15,
    7,0,089a4,0,1,5,14,7,0,08cc3,5,2,5,14,7,0,08c8e,9,0,7,
    16,2,8,18,0,2,0e,8,-11,-3,0
    *089A4,39,primitive
    2,0e,8,-7,-15,2,8,1,14,1,0c0,
    2,8,-11,-6,1,0a0,2,8,-12,-7,1,
    0e0,2,8,-7,13,1,0dc,2,8,11,-1,
    2,0e,8,-11,-3,0
    *08BCA,41,primitive
    2,0e,8,-7,-15,2,8,1,14,1,0c0,
    2,8,-11,-6,1,0a0,2,8,-12,-8,1,
    0e0,2,0e5,1,0ec,2,063,1,8,
    2,-3,2,06f,2,0e,8,-11,-3,0
    *08BE0,81,primitive
    2,0e,8,-7,-15,2,8,3,9,1,080,
    2,8,-10,-4,1,0c0,2,8,-13,-5,1,
    0e0,2,8,-7,9,1,09c,2,8,-1,14,
    1,8,-6,-5,2,8,8,5,1,8,6,-5,
    2,8,-11,-6,1,8,1,-3,2,8,7,3,
    1,8,-1,-3,2,8,-3,15,1,01a,2,
    012,1,01e,2,8,10,-14,2,0e,8,
    -11,-3,0
    *08C8E,44,primitive
    2,0e,8,-7,-15,2,8,3,15,1,090,0fc,038,
    2,8,-6,11,1,090,2,8,-9,-5,1,
    090,2,096,1,0ac,8,-1,-3,01a,01a,2,8,
    18,0,2,0e,8,-11,-3,0
    *08CB3,61,primitive
    2,0e,8,-7,-15,2,042,1,02b,02a,018,2,
    0d0,1,012,034,2,069,1,01e,040,2,8,
    -8,6,1,02b,2,8,4,5,1,08c,2,8,
    -3,8,1,03c,2,8,-5,3,1,0e0,2,8,
    -12,5,1,0a0,2,8,6,-14,2,0e,8,
    -11,-3,0
    *08CC3,34,primitive
    2,0e,8,-7,-15,2,0c1,1,06c,0a8,064,0a0,2,8,
    -5,9,1,09c,2,8,-7,5,1,0e0,2,8,
    4,-11,2,0e,8,-11,-3,0
    *08CFB,22,primitive
    2,0e,8,-7,-15,2,0d2,1,0cc,0c8,0c4,0c0,2,8,
    5,-13,2,0e,8,-11,-3,0

    Learning AutoCad

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