FontStyle { field SFString family "SERIF" field SFBool horizontal TRUE field MFString justify "BEGIN" field SFString language "" field SFBool leftToRight TRUE field SFFloat size 1.0 field SFFloat spacing 1.0 field SFString style "PLAIN" field SFBool topToBottom TRUE }Explanation :
The FontStyle node defines the size, font family, and style of text's font, as well as the direction of the text strings and any specific language rendering techniques that must be used for non-English text. See Text node for application of FontStyle.
The size field specifies the height (in object space units) of glyphs rendered and determines the spacing of adjacent lines of text. All subsequent strings advance in either X or Y by -( size * spacing).
Font Family and Style
Font attributes are defined with the family and style fields. It is up to the browser to assign specific fonts to the various attribute combinations.
The family field specifies a case-sensitive SFString value that may be "SERIF" (the default) for a serif font such as Times Roman; "SANS" for a sans-serif font such as Helvetica; or "TYPEWRITER" for a fixed-pitch font such as Courier. A family value of empty quotes, "", is identical to "SERIF".
The style field specifies a case-sensitive SFString value that may be "PLAIN" (the default) for default plain type; "BOLD" for boldface type; "ITALIC" for italic type; or "BOLDITALIC" for bold and italic type. A style value of empty quotes, "", is identical to "PLAIN".
Direction, Justification and Spacing
The horizontal, leftToRight, and topToBottom fields indicate the direction of the text. The horizontal field indicates whether the text advances horizontally in its major direction (horizontal = TRUE, the default) or vertically in its major direction (horizontal = FALSE). The leftToRight and topToBottom fields indicate direction of text advance in the major (characters within a single string) and minor (successive strings) axes of layout. Which field is used for the major direction and which is used for the minor direction is determined by the horizontal field.
For horizontal text (horizontal = TRUE), characters on each line of text advance in the positive X direction if leftToRight is TRUE or in the negative X direction if leftToRight is FALSE. Characters are advanced according to their natural advance width. Then each line of characters is advanced in the negative Y direction if topToBottom is TRUE or in the positive Y direction if topToBottom is FALSE. Lines are advanced by the amount of size * spacing.
For vertical text (horizontal = FALSE), characters on each line of text advance in the negative Y direction if topToBottom is TRUE or in the positive Y direction if topToBottom is FALSE. Characters are advanced according to their natural advance height. Then each line of characters is advanced in the positive X direction if leftToRight is TRUE or in the negative X direction if leftToRight is FALSE. Lines are advanced by the amount of size * spacing.
The justify field determines alignment of the above text layout relative to the origin of the object coordinate system. It is an MFString which can contain 2 values. The first value specifies alignment along the major axis and the second value specifies alignment along the minor axis, as determined by the horizontal field. A justify value of "" is equivalent to the default value. If the second string, minor alignment, is not specified then it defaults to the value "FIRST". Thus, justify values of "", "BEGIN", and ["BEGIN" "FIRST"] are equivalent.
The major alignment is along the X axis when horizontal is TRUE and along the Y axis when horizontal is FALSE. The minor alignment is along the Y axis when horizontal is TRUE and along the X axis when horizontal is FALSE. The possible values for each enumerant of the justify field are "FIRST", "BEGIN", "MIDDLE", and "END". For major alignment, each line of text is positioned individually according to the major alignment enumerant. For minor alignment, the block of text representing all lines together is positioned according to the minor alignment enumerant.