feat: new border option to control packing space to atlas edge

Author: soimy

cli.js

@@ -20,6 +20,7 @@ args
   .option('-i, --charset-file <charset>', 'user-specified charactors from text-file', fileExistValidate)
   .option('-m, --texture-size <w,h>', 'ouput texture atlas size (defaut: 2048,2048)', (v) => {return v.split(',')}, [2048, 2048])
   .option('-p, --texture-padding <n>', 'padding between glyphs (default: 1)', 1)
+  .option('-b, --border <n>', 'space between glyphs textures & edge (default: 0)', 0)
   .option('-r, --distance-range <n>', 'distance range for SDF (default: 4)', 4)
   .option('-t, --field-type <type>', 'msdf(default) | sdf | psdf | svg', /^(msdf|sdf|psdf|svg)$/i, 'msdf')
   .option('-d, --round-decimal <digit>', 'rounded digits of the output font file. (Defaut: 0)', 0)

index.js

@@ -92,6 +92,7 @@ function generateBMFont (fontPath, opt, callback) {
   const textureWidth = opt.textureWidth = utils.valueQueue([opt.textureSize || reuse.textureSize, [512, 512]])[0];
   const textureHeight = opt.textureHeight = utils.valueQueue([opt.textureSize || reuse.textureSize, [512, 512]])[1];
   const texturePadding = opt.texturePadding = utils.valueQueue([opt.texturePadding, reuse.texturePadding, 1]);
+  const border = opt.border = utils.valueQueue([opt.border, reuse.border, 0]);
   const distanceRange = opt.distanceRange = utils.valueQueue([opt.distanceRange, reuse.distanceRange, 4]);
   const fieldType = opt.fieldType = utils.valueQueue([opt.fieldType, reuse.fieldType, 'msdf']);
   const roundDecimal = opt.roundDecimal = utils.valueQueue([opt.roundDecimal, reuse.roundDecimal]); // if no roudDecimal option, left null as-is
@@ -118,7 +119,9 @@ function generateBMFont (fontPath, opt, callback) {
     smart: smartSize,
     pot: pot,
     square: square,
-    allowRotation: allowRotation
+    allowRotation: allowRotation,
+    tag: false,
+    border: border
   });
   const chars = [];