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SamsaFont

Class representing a variable font.

Constructor

SamsaFont( init : Object , config : Object )

Parameters:

  1. init : Object

    init: {
  url: String,
  fontFamily: String,
  callback: Function,

  arrayBuffer: ArrayBuffer,
  inFile: String, 
  outFile: String,
  filesize: String,
  date: String
}

  2. config : Object - (optional)

    Any properties defined in the config parameter override properties defined in the global CONFIG object.

    defaultConfig = {
  isNode: false,
  outFileDefault: "samsa-out.ttf",
  instantiation: {
    method: "default",
    skipTables: ["gvar","fvar","cvar","avar","STAT","MVAR","HVAR","VVAR","DSIG"],
    ignoreIUP: false
  },
  defaultGlyph: ["A", "a", "Alpha", "alpha", "afii10017", "A-cy", "afii10065", "a-cy", "zero"],
  sfnt: {
    maxNumTables: 100,
    maxSize: 10000000
  },
  glyf: {
    overlapSimple: true,
    bufferSize: 500000,
    compression: true
  },
  name: {
    maxSize: 50000
  },
  deltas: {
    round: true
  },
  postscriptNames: [".notdef",".null","nonmarkingreturn","space","exclam","quotedbl","numbersign","dollar","percent","ampersand","quotesingle","parenleft","parenright","asterisk","plus","comma","hyphen","period","slash","zero","one","two","three","four","five","six","seven","eight","nine","colon","semicolon","less","equal","greater","question","at","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","bracketleft","backslash","bracketright","asciicircum","underscore","grave","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","braceleft","bar","braceright","asciitilde","Adieresis","Aring","Ccedilla","Eacute","Ntilde","Odieresis","Udieresis","aacute","agrave","acircumflex","adieresis","atilde","aring","ccedilla","eacute","egrave","ecircumflex","edieresis","iacute","igrave","icircumflex","idieresis","ntilde","oacute","ograve","ocircumflex","odieresis","otilde","uacute","ugrave","ucircumflex","udieresis","dagger","degree","cent","sterling","section","bullet","paragraph","germandbls","registered","copyright","trademark","acute","dieresis","notequal","AE","Oslash","infinity","plusminus","lessequal","greaterequal","yen","mu","partialdiff","summation","product","pi","integral","ordfeminine","ordmasculine","Omega","ae","oslash","questiondown","exclamdown","logicalnot","radical","florin","approxequal","Delta","guillemotleft","guillemotright","ellipsis","nonbreakingspace","Agrave","Atilde","Otilde","OE","oe","endash","emdash","quotedblleft","quotedblright","quoteleft","quoteright","divide","lozenge","ydieresis","Ydieresis","fraction","currency","guilsinglleft","guilsinglright","fi","fl","daggerdbl","periodcentered","quotesinglbase","quotedblbase","perthousand","Acircumflex","Ecircumflex","Aacute","Edieresis","Egrave","Iacute","Icircumflex","Idieresis","Igrave","Oacute","Ocircumflex","apple","Ograve","Uacute","Ucircumflex","Ugrave","dotlessi","circumflex","tilde","macron","breve","dotaccent","ring","cedilla","hungarumlaut","ogonek","caron","Lslash","lslash","Scaron","scaron","Zcaron","zcaron","brokenbar","Eth","eth","Yacute","yacute","Thorn","thorn","minus","multiply","onesuperior","twosuperior","threesuperior","onehalf","onequarter","threequarters","franc","Gbreve","gbreve","Idotaccent","Scedilla","scedilla","Cacute","cacute","Ccaron","ccaron","dcroat"]
}

Returns:

SamsaFont

Example:

let vf = new SamsaFont({
  fontFamily: "FontNameShouldGoHere",
  url: "fonts/Sans_Variable.ttf",
  callback: function(font) {}
});
let vf = new SamsaFont({
  arrayBuffer: e.target.result,
  inFile: file.name,
  filesize: file.size,  //Optional
  date: file.lastModified,  //Optional
  callback: function(font) {}
});

Properties

.fontFamily

Font Family name

Type: String

.unitsPerEm

It specifies the number of coordinate units on the "em square", an abstract square whose height is the intended distance between lines of type in the same type size. This is the size of the design grid on which glyphs are laid out. Example value: 1000

Type: Number

.numGlyphs

Total number of glyphs

Type: Number

.italicAngle

Angle of the italic style

Type: Number

.instances

Array of instances in this SamsaFont object. Initially, these instances are the Default followed by all the Named Instances defined in the fvar table of the input VF, but instances can be added, modified and deleted so the instances array may no longer correspond with the input VF.

Type: Array of Object

Example:

[{
  id: 0,
  glyphs: [],
  tuple: [
    0,
    0,
    0
  ],
  fvs: {
    fmsk: 0,
    hdrs: 0,
    hscl: 0
  },
  static: null,
  name: 'Default',
  type: 'default'
}]

.axes

Array of the VF’s axes.

Type: Array of Object

Example:

[{
  id: 0,
  tag: 'fmsk',
  min: 0,
  default: 0,
  max: 100,
  flags: 0,
  axisNameID: 256,
  name: 'WearFaceMask'
}]

.axisCount

Total number of axes.

Type: Number

.axisTagToId

Map of axis tag to axis id.

Type: Object

Example:

axisTagToId: {
  wght: 0,
  wdth: 1,
  ital: 2
}

.errors

Type: Array of String

.glyphs

Return all of this font’ glyphs as Array of SamsaGlyph objects The array indices correspond exactly with glyph ids in the original font file.

Type: Array of SamsaGlyph objects.

.widths

Array of each glyph’s width

Type: Array of Number

Example:

[
  800,
  600,
  0,
  240,
  512,
  502,
  485,
  502
]

.glyphNames

Array of each glyph’s name, such as "A"

Type: Array of String

Example:

[
  ".notdef",
  "NULL",
  "nonmarkingreturn",
  "space",
  "A",
  "B",
  "C",
  "D",
  "E",
  "F",
  "G",
]

.glyphOffsets

Type: Array of Number

.glyphSizes

Type: Array of Number

.tupleOffsets

Type: Array of Number

.tupleSizes

Type: Array of Number

.avar

Type: Array

.url

Font url

Type: String

.path

Font url or font file

Type: String

Example:

"https://res.cloudinary.com/dr6lvwubh/raw/upload/v1596755490/Variable%20Fonts/KairosSans_Variable.ttf",

.arrayBuffer

Type: ArrayBuffer

.filename

Font file name. Example value: KairosSans_Variable.ttf

Type: String

.filesize

Font file size. Example value: 68404

Type: Number

.flavor

Font file flavor. Example value: truetype

Type: String

.numTables

Total number of font data tables. Example value: 16

Type: Number

.tableDirectory

Array of font data tables.

Type: Array of Object

Example:

[{
  id: 0,
  tag: 'HVAR',
  checkSum: 1677429614,
  offset: 15684,
  length: 1393
}]

.tables

Font data tables as object

Type: Object

Example:

{
  ...
  fvar: {
    id: 5,
    tag: 'fvar',
    checkSum: 270942577,
    offset: 17528,
    length: 844,
    data: {
      majorVersion: 1,
      minorVersion: 0,
      offsetToAxesArray: 16,
      countSizePairs: 2,
      axisCount: 3,
      axisSize: 20,
      instanceCount: 48,
      instanceSize: 16
    }
  }
}

.names

Font information: designer names, axis names, instance names, version, legal information, etc.

Type: Array

.config

The config that got passed in from constructor or the default config if not passed in.

Type: Object

Methods

.getNamedInstances ()

Return all named instances from font.instances as an array of instances.

Returns:

Array of Object

Source:

samsa/src/samsa-core.js:2337

.addInstance ( fvs , options )

Add an new instance to font.instances, then return the added instance.

Parameters:

  1. fvs : Object
  2. options : Object

Returns:

Object

Source:

samsa/src/samsa-core.js:2349

.makeInstance ( instance )

Source:

samsa/src/samsa-core.js:2388

.fvsToTuple ( fvs )

Convert fvs to tuple.

Returns:

Array

Source:

samsa/src/samsa-core.js:2404

.tupleToFvs ( tuple )

Convert tuple to fvs.

Returns:

Object

Source:

samsa/src/samsa-core.js:2419

.axisIndices ( tag )

Returns an array containing the axis indices for this axis tag

Parameters:

  1. tag : String

Returns:

Array

Source:

samsa/src/samsa-core.js:2462

.axisNormalize ( axis , t , avarIgnore )

Source:

samsa/src/samsa-core.js:2548

.exportInstance ( instance )

Creates a new static font file, based on the axis settings of instance. The font file is created either on disk (this.config.isNode == true) or in memory (this.config.isNode == false).

Returns:

If this.config.isNode == false, returns a Uint8Array, being the font binary in memory.

Source:

samsa/src/samsa-core.js:1713

.parse ()

Source:

samsa/src/samsa-core.js:697

.parseGlyph ( glyph )

Source:

samsa/src/samsa-core.js:1269

.parseSmallTable ( tag )

Source:

samsa/src/samsa-core.js:806

.parseTvts ( glyph )

Source:

samsa/src/samsa-core.js:1466

Source

samsa/src/samsa-core.js
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