Documentation

Fields

• _fontOffsetTable :: !OffsetTable

  Field discribing various offsets/positions of table inside the font file. Not available for reading.

• _fontTables :: ![(ByteString, ByteString)]
   
• _fontNames :: Maybe NameTable
   
• _fontHeader :: Maybe FontHeader
   
• _fontMaxp :: Maybe MaxpTable
   
• _fontMap :: Maybe CharacterMaps
   
• _fontGlyph :: Maybe (Vector Glyph)
   
• _fontLoca :: Maybe (Vector Word32)
   
• _fontHorizontalHeader :: Maybe HorizontalHeader
   
• _fontHorizontalMetrics :: Maybe HorizontalMetricsTable
   

Fields

• _fHdrVersionNumber :: !Fixed

  Table version number 0x00010000 for version 1.0.

• _fHdrFontRevision :: !Fixed

  fontRevision Set by font manufacturer.

• _fHdrChecksumAdjust :: !Word32

  To compute: set it to 0, sum the entire font as ULONG, then store 0xB1B0AFBA - sum.

• _fHdrMagicNumber :: !Word32

  Should be equal to 0x5F0F3CF5.

• _fHdrFlags :: !HeaderFlags
   
• _fUnitsPerEm :: !Word16

  Valid range is from 16 to 16384

• _fHdrCreateTime :: !Word64

  International date (8-byte field).

• _fHdrModificationTime :: !Word64

  International date (8-byte field).

• _fHdrxMin :: !FWord

  For all glyph bounding boxes.

• _fHdrYMin :: !FWord

  For all glyph bounding boxes.

• _fHdrXMax :: !FWord

  For all glyph bounding boxes.

• _fHdrYMax :: !FWord

  For all glyph bounding boxes.

• _fHdrMacStyle :: !FontStyle

  Bit 0 bold (if set to 1); Bit 1 italic (if set to 1)

• _fHdrLowestRecPPEM :: !Word16

  Smallest readable size in pixels.

• _fHdrFontDirectionHint :: !Int16

  0 Fully mixed directional glyphs; 1 Only strongly left to right; 2 Like 1 but also contains neutrals ; -1 Only strongly right to left; -2 Like -1 but also contains neutrals.

• _fHdrIndexToLocFormat :: !Int16

  0 for short offsets, 1 for long.

• _fHdrGlyphDataFormat :: !Int16

  0 for current format.

Fields

• _hfBaselineY0 :: !Bool

  Bit 0 - baseline for font at y=0;

• _hfLeftSideBearing :: !Bool

  Bit 1 - left sidebearing at x=0;

• _hfInstrDependPointSize :: !Bool

  Bit 2 - instructions may depend on point size;

• _hfForcePPEM :: !Bool

  Bit 3 - force ppem to integer values for all internal scaler math; may use fractional ppem sizes if this bit is clear;

• _hfAlterAdvance :: !Bool

  Bit 4 - instructions may alter advance width (the advance widths might not scale linearly);

Fields

• _hheaAscent :: !FWord

  Distance from baseline of highest ascender

• _hheaDescent :: !FWord

  Distance from baseline of lowest descender

• _hheaLineGap :: !FWord

  typographic line gap

• _hheaAdvanceWidthMax :: !FWord

  must be consistent with horizontal metrics

• _hheaMinLeftSideBearing :: !FWord

  must be consistent with horizontal metrics

• _hheaMinRightSideBearing :: !FWord

  must be consistent with horizontal metrics

• _hheaXmaxExtent :: !FWord

  max(lsb + (xMax-xMin))

• _hheaCaretSlopeRise :: !Int16

  used to calculate the slope of the caret (rise/run) set to 1 for vertical caret

• _hheaCaretSlopeRun :: !Int16

  0 for vertical

• _hheaCaretOffset :: !FWord

  set value to 0 for non-slanted fonts

• _hheaMetricDataFormat :: !Int16

  0 for current format

• _hheaLongHorMetricCount :: !Word16

  number of advance widths in metrics table

Fields

• _hmtxAdvanceWidth :: !Word16
   
• _hmtxLeftSideBearing :: !Int16
   

Fields

• _glyphMetrics :: !(Vector HorizontalMetric)
   

Fields

• _maxpTableVersion :: !Fixed

  version number 0x00010000 for version 1.0.

• _maxpnumGlyphs :: !Word16

  The number of glyphs in the font.

• _maxpmaxPoints :: !Word16

  Maximum points in a non-composite glyph.

• _maxpmaxContours :: !Word16

  Maximum contours in a non-composite glyph.

• _maxpmaxCompositePoints :: !Word16

  Maximum points in a composite glyph.

• _maxpmaxCompositeContours :: !Word16

  Maximum contours in a composite glyph.

• _maxpmaxZones :: !Word16

  1 if instructions do not use the twilight zone (Z0), or 2 if instructions do use Z0; should be set to 2 in most cases.

• _maxpmaxTwilightPoints :: !Word16

  Maximum points used in Z0.

• _maxpmaxStorage :: !Word16

  Number of Storage Area locations.

• _maxpmaxFunctionDefs :: !Word16

  Number of FDEFs.

• _maxpmaxInstructionDefs :: !Word16

  Number of IDEFs.

• _maxpmaxStackElements :: !Word16

  Maximum stack depth .

• _maxpmaxSizeOfInstructions :: !Word16

  Maximum byte count for glyph instructions.

• _maxpmaxComponentElements :: !Word16

  Maximum number of components referenced at "top level" for any composite glyph.

• _maxpmaxComponentDepth :: !Word16

  Maximum levels of recursion; 1 for simple components.