colorspace_wasm/index.js

A js wrapper for colorspace c++ code to generate color spectrums(LCH, HSV, LUV, RGB).

// load webassembly
// https://gist.github.com/surma/b2705b6cca29357ebea1c9e6e15684cc
import MyColorSpace from './src/colorspace.js';

async function ColorSpectrumHSV(color1, color2, sz) {
  let wasm = await MyColorSpace();
  let a = new wasm.Rgb(color1.red, color1.green, color1.blue);
  let b = new wasm.Rgb(color2.red, color2.green, color2.blue);

  let colors = wasm.ColorSpectrumHSV(a, b, sz);
  const ncolors = colors.size();

  let return_val = [];

  for (let i=0; i<ncolors; ++i) {
    return_val.push({
      'red': colors.get(i).GetR(),
      'green': colors.get(i).GetG(),
      'blue': colors.get(i).GetB()
    });
  }
  a.delete();
  b.delete();

  return new Promise(function(resolve, reject) {
    resolve(return_val);
  });
}

//Object.defineProperty(exports, "__esModule", { value: true });

exports.ColorSpectrumHSV = ColorSpectrumHSV;