Implement RTL language support

assets/charset/charset.persian.txt

@@ -0,0 +1,33 @@
+ببب ب
+تتت ت
+ضضض ض
+صصص ص
+ثثث ث
+ققق ق
+ففف ف
+غغغ غ
+ععع ع
+ههه ه
+خخخ خ
+ححح ح
+ججج ج
+چچچ چ
+ششش ش
+سسس س
+ییی ئ ی ي
+ببب ب
+للل ل
+اآ
+ننن ن
+ممم م
+ککک ک
+گگگ گ
+ظظظ ظ
+ططط ط
+زرژ
+و
+ذد
+پپپ پ
+َُِّ
+":><؟{}|+_()&*!@#$%×÷÷`|;'[].,/\،-=
+12345567890

cli.js

@@ -28,6 +28,7 @@ args
   .option('    --smart-size', 'shrink atlas to the smallest possible square (Default: false)', false)
   .option('    --pot', 'atlas size shall be power of 2 (Default: false)', false)
   .option('    --square', 'atlas size shall be square (Default: false)', false)
+  .option('    --rtl', 'use RTL charators fix (Default: false)', false)
   .action(function(file){
     fontFile = fileExistValidate(file);
   }).parse(process.argv);
@@ -57,6 +58,7 @@ opt.reuse = utils.valueQueue([opt.reuse, false]);
 opt.smartSize = utils.valueQueue([opt.smartSize, false]);
 opt.pot = utils.valueQueue([opt.pot, false]);
 opt.square = utils.valueQueue([opt.square, false]);
+opt.rtl = utils.valueQueue([opt.rtl, false]);
 
 //
 // Display options 

index.js

@@ -1,4 +1,5 @@
 const utils = require('./lib/utils');
+const reshaper = require('arabic-persian-reshaper');
 const opentype = require('opentype.js');
 const exec = require('child_process').exec;
 const mapLimit = require('map-limit');
@@ -36,6 +37,7 @@ module.exports = generateBMFont;
  *            smartSize : shrink atlas to the smallest possible square (Default: false)
  *            pot : atlas size shall be power of 2 (Default: false)
  *            square : atlas size shall be square (Default: false)
+ *            rtl : use RTL charators fix (Default: false)
  * @param {function(string, Array.<Object>, Object)} callback - Callback funtion(err, textures, font) 
  *
  */
@@ -79,7 +81,6 @@ function generateBMFont (fontPath, opt, callback) {
       reuse = cfg.opt;
     }
   } else reuse = {};
-  let charset = opt.charset = (typeof opt.charset === 'string' ? opt.charset.split('') : opt.charset) || reuse.charset || defaultCharset;
   const outputType = opt.outputType = utils.valueQueue([opt.outputType, reuse.outputType, "xml"]);
   let filename = utils.valueQueue([opt.filename, reuse.filename]);
   const fontSize = opt.fontSize = utils.valueQueue([opt.fontSize, reuse.fontSize, 42]);
@@ -96,7 +97,9 @@ function generateBMFont (fontPath, opt, callback) {
   const square = opt.square = utils.valueQueue([opt.square, reuse.square, false]);
   const debug = opt.vector || false;
   const tolerance = opt.tolerance = utils.valueQueue([opt.tolerance, reuse.tolerance, 0]);
-  // const cfg = typeof opt.reuse === 'boolean' ? opt.reuse : false;
+  const isRTL = opt.rtl = utils.valueQueue([opt.rtl, reuse.rtl, false]);
+  if (isRTL) opt.charset = require('arabic-persian-reshaper').convertArabic(opt.charset);
+  let charset = opt.charset = (typeof opt.charset === 'string' ? Array.from(opt.charset) : opt.charset) || reuse.charset || defaultCharset;
 
   // TODO: Validate options
   if (fieldType !== 'msdf' && fieldType !== 'sdf' && fieldType !== 'psdf') {

package.json

@@ -40,6 +40,7 @@
   },
   "license": "MIT",
   "dependencies": {
+    "arabic-persian-reshaper": "^1.0.0",
     "canvas-prebuilt": "^1.6.5-prerelease.1",
     "cli-progress": "^1.7.0",
     "commander": "^2.12.2",