Function getGlyph

stackgl_modules/index.js:19337–19406

(symbol, font, pixelRatio)

var GLYPH_CACHE = {}

function getGlyph(symbol, font, pixelRatio) {
  var fontKey = [
    font.style,
    font.weight,
    font.variant,
    font.family
  ].join('_')

  var fontCache = GLYPH_CACHE[fontKey]
  if(!fontCache) {
    fontCache = GLYPH_CACHE[fontKey] = {}
  }
  if(symbol in fontCache) {
    return fontCache[symbol]
  }

  var config = {
    textAlign: "center",
    textBaseline: "middle",
    lineHeight: 1.0,
    font: font.family,
    fontStyle: font.style,
    fontWeight: font.weight,
    fontVariant: font.variant,
    lineSpacing: 1.25,
    styletags: {
      breaklines:true,
      bolds: true,
      italics: true,
      subscripts:true,
      superscripts:true
    }
  }

  //Get line and triangle meshes for glyph
  config.triangles = true
  var triSymbol = vectorizeText(symbol, config)
  config.triangles = false
  var lineSymbol = vectorizeText(symbol, config)

  var i, j

  if(pixelRatio && pixelRatio !== 1) {
    for(i = 0; i < triSymbol.positions.length; ++i){
      for(j = 0; j < triSymbol.positions[i].length; ++j){
        triSymbol.positions[i][j] /= pixelRatio;
      }
    }

    for(i = 0; i < lineSymbol.positions.length; ++i){
      for(j = 0; j < lineSymbol.positions[i].length; ++j){
        lineSymbol.positions[i][j] /= pixelRatio;
      }
    }
  }

  //Calculate bounding box
  var bounds = [[Infinity,Infinity], [-Infinity,-Infinity]]