git.kianting.info Git - clo/blob - src/harfbuzz.js

   1 "use strict";
   2 Object.defineProperty(exports, "__esModule", { value: true });
   3 exports.harfbuzzTest = void 0;
   4 var hb = require('harfbuzzjs/hbjs');
   5 var fs = require('fs');
   6 function harfbuzzTest(inputString) {
   7     WebAssembly.instantiate(fs.readFileSync(__dirname + "/../3rdparty/harfbuzzjs/hb.wasm"))
   8         .then(function (wsm) {
   9         hb = hb(wsm.instance);
  10         let fontdata = fs.readFileSync("/usr/share/fonts/truetype/freefont/FreeSerif.ttf");
  11         //hbjs(fontdata.instance);
  12         //console.log(a);
  13         var blob = hb.createBlob(fontdata); // Load the font data into something Harfbuzz can use
  14         var face = hb.createFace(blob, 0); // Select the first font in the file (there's normally only one!)
  15         var font = hb.createFont(face); // Create a Harfbuzz font object from the face
  16         var buffer = hb.createBuffer(); // Make a buffer to hold some text
  17         buffer.addText(inputString); // Fill it with some stuff
  18         buffer.guessSegmentProperties(); // Set script, language and direction
  19         hb.shape(font, buffer); // Shape the text, determining glyph IDs and positions
  20         var output = buffer.json();
  21         // Enumerate the glyphs
  22         console.log("id\tax\tdx\tdy");
  23         var xCursor = 0;
  24         var yCursor = 0;
  25         for (var glyph of output) {
  26             var glyphId = glyph.g;
  27             var xAdvance = glyph.ax;
  28             var xDisplacement = glyph.dx;
  29             var yDisplacement = glyph.dy;
  30             var svgPath = font.glyphToPath(glyphId);
  31             console.log(glyphId + "\t" + xAdvance + "\t" + xDisplacement + "\t" + yDisplacement);
  32             // You need to supply this bit
  33             //drawAGlyph(svgPath, xCursor + xDisplacement, yDisplacement);
  34             // xCursor += xAdvance;
  35         }
  36         // Release memory
  37         buffer.destroy();
  38         font.destroy();
  39         face.destroy();
  40         blob.destroy();
  41     });
  42 }
  43 exports.harfbuzzTest = harfbuzzTest;