TtfOS2Table.ts class for EJ2-PDF The OS/2 table consists of a set of metrics that are required by Windows and OS/2.
number
Information concerning the nature of the font patterns.
number
Indicates font embedding licensing rights for the font. Embeddable fonts may be stored in a document. When a document with embedded fonts is opened on a system that does not have the font installed (the remote system), the embedded font may be loaded for temporary (and in some cases, permanent) use on that system by an embedding-aware application. Embedding licensing rights are granted by the vendor of the font.
number[]
This 10 byte series of numbers are used to describe the visual characteristics of a given typeface. These characteristics are then used to associate the font with other fonts of similar appearance having different names. The variables for each digit are listed below. The specifications for each variable can be obtained in the specification PANOSE v2.0 Numerical Evaluation from Microsoft Corporation.
number
Structure field.
number
This parameter is a classification of font-family design.
number
The typographic ascender for this font. Remember that this is not the same as the Ascender value in the ‘h h e a’ table, which Apple defines in a far different manner. DEFTABLEOFFSET good source for usTypoAscender is the Ascender value from an A F M file.
number
The typographic descender for this font. Remember that this is not the same as the Descender value in the ‘h h e a’ table, which Apple defines in a far different manner. DEFTABLEOFFSET good source for usTypoDescender is the Descender value from an A F M file.
number
The typographic line gap for this font. Remember that this is not the same as the LineGap value in the ‘h h e a’ table, which Apple defines in a far different manner.
number
Structure field.
number
This field is used to specify the code pages encompassed by the font file in the ‘cmap’ subtable for platform 3, encoding ID 1 (Microsoft platform). If the font file is encoding ID 0, then the Symbol Character Set bit should be set. If the bit is set (1) then the code page is considered functional. If the bit is clear (0) then the code page is not considered functional. Each of the bits is treated as an independent flag and the bits can be set in any combination. The determination of “functional” is left up to the font designer, although character set selection should attempt to be functional by code pages if at all possible.
number
This field is used to specify the code pages encompassed by the font file in the ‘cmap’ subtable for platform 3, encoding ID 1 (Microsoft platform). If the font file is encoding ID 0, then the Symbol Character Set bit should be set. If the bit is set (1) then the code page is considered functional. If the bit is clear (0) then the code page is not considered functional. Each of the bits is treated as an independent flag and the bits can be set in any combination. The determination of “functional” is left up to the font designer, although character set selection should attempt to be functional by code pages if at all possible.
number
Structure field.
number
Structure field.
number
Structure field.
number
Structure field.
number
Structure field.
number
Structure field.
number
The minimum Unicode index (character code) in this font, according to the cmap subtable for platform ID 3 and encoding ID 0 or 1. For most fonts supporting Win-ANSI or other character sets, this value would be 0x0020.
number
usLastCharIndex: The maximum Unicode index (character code) in this font, according to the cmap subtable for platform ID 3 and encoding ID 0 or 1. This value depends on which character sets the font supports.
number
Structure field.
number
Indicates the visual weight (degree of blackness or thickness of strokes) of the characters in the font.
number
Indicates a relative change from the normal aspect ratio (width to height ratio) as specified by a font designer for the glyphs in a font.
number
The ascender metric for Windows. This too is distinct from Apple’s Ascender value and from the usTypoAscender values. usWinAscent is computed as the yMax for all characters in the Windows ANSI character set. usTypoAscent is used to compute the Windows font height and default line spacing. For platform 3 encoding 0 fonts, it is the same as yMax.
number
The descender metric for Windows. This too is distinct from Apple’s Descender value and from the usTypoDescender values. usWinDescent is computed as the -yMin for all characters in the Windows ANSI character set. usTypoAscent is used to compute the Windows font height and default line spacing. For platform 3 encoding 0 fonts, it is the same as -yMin.
number[]
The four character identifier for the vendor of the given type face.
number
Structure field.
number
The Average Character Width parameter specifies the arithmetic average of the escapement (width) of all of the 26 lowercase letters a through z of the Latin alphabet and the space character. If any of the 26 lowercase letters are not present, this parameter should equal the weighted average of all glyphs in the font. For non - U G L (platform 3, encoding 0) fonts, use the unweighted average.
number
The position of the strikeout stroke relative to the baseline in font design units.
number
Width of the strikeout stroke in font design units.
number
The recommended horizontal offset in font design units for subscripts for this font.
number
The recommended horizontal size in font design units for subscripts for this font.
number
The recommended vertical offset in font design units from the baseline for subscripts for this font.
number
The recommended vertical size in font design units for subscripts for this font.
number
The recommended horizontal offset in font design units for superscripts for this font.
number
The recommended horizontal size in font design units for superscripts for this font.
number
The recommended vertical offset in font design units from the baseline for superscripts for this font.
number
The recommended vertical size in font design units for superscripts for this font.