first commit

build/node_modules/parse-bmfont-binary/index.js

@@ -0,0 +1,160 @@
+var HEADER = [66, 77, 70]
+
+module.exports = function readBMFontBinary(buf) {
+  if (buf.length < 6)
+    throw new Error('invalid buffer length for BMFont')
+
+  var header = HEADER.every(function(byte, i) {
+    return buf.readUInt8(i) === byte
+  })
+
+  if (!header)
+    throw new Error('BMFont missing BMF byte header')
+
+  var i = 3
+  var vers = buf.readUInt8(i++)
+  if (vers > 3)
+    throw new Error('Only supports BMFont Binary v3 (BMFont App v1.10)')
+  
+  var target = { kernings: [], chars: [] }
+  for (var b=0; b<5; b++)
+    i += readBlock(target, buf, i)
+  return target
+}
+
+function readBlock(target, buf, i) {
+  if (i > buf.length-1)
+    return 0
+
+  var blockID = buf.readUInt8(i++)
+  var blockSize = buf.readInt32LE(i)
+  i += 4
+
+  switch(blockID) {
+    case 1: 
+      target.info = readInfo(buf, i)
+      break
+    case 2:
+      target.common = readCommon(buf, i)
+      break
+    case 3:
+      target.pages = readPages(buf, i, blockSize)
+      break
+    case 4:
+      target.chars = readChars(buf, i, blockSize)
+      break
+    case 5:
+      target.kernings = readKernings(buf, i, blockSize)
+      break
+  }
+  return 5 + blockSize
+}
+
+function readInfo(buf, i) {
+  var info = {}
+  info.size = buf.readInt16LE(i)
+
+  var bitField = buf.readUInt8(i+2)
+  info.smooth = (bitField >> 7) & 1
+  info.unicode = (bitField >> 6) & 1
+  info.italic = (bitField >> 5) & 1
+  info.bold = (bitField >> 4) & 1
+  
+  //fixedHeight is only mentioned in binary spec 
+  if ((bitField >> 3) & 1)
+    info.fixedHeight = 1
+  
+  info.charset = buf.readUInt8(i+3) || ''
+  info.stretchH = buf.readUInt16LE(i+4)
+  info.aa = buf.readUInt8(i+6)
+  info.padding = [
+    buf.readInt8(i+7),
+    buf.readInt8(i+8),
+    buf.readInt8(i+9),
+    buf.readInt8(i+10)
+  ]
+  info.spacing = [
+    buf.readInt8(i+11),
+    buf.readInt8(i+12)
+  ]
+  info.outline = buf.readUInt8(i+13)
+  info.face = readStringNT(buf, i+14)
+  return info
+}
+
+function readCommon(buf, i) {
+  var common = {}
+  common.lineHeight = buf.readUInt16LE(i)
+  common.base = buf.readUInt16LE(i+2)
+  common.scaleW = buf.readUInt16LE(i+4)
+  common.scaleH = buf.readUInt16LE(i+6)
+  common.pages = buf.readUInt16LE(i+8)
+  var bitField = buf.readUInt8(i+10)
+  common.packed = 0
+  common.alphaChnl = buf.readUInt8(i+11)
+  common.redChnl = buf.readUInt8(i+12)
+  common.greenChnl = buf.readUInt8(i+13)
+  common.blueChnl = buf.readUInt8(i+14)
+  return common
+}
+
+function readPages(buf, i, size) {
+  var pages = []
+  var text = readNameNT(buf, i)
+  var len = text.length+1
+  var count = size / len
+  for (var c=0; c<count; c++) {
+    pages[c] = buf.slice(i, i+text.length).toString('utf8')
+    i += len
+  }
+  return pages
+}
+
+function readChars(buf, i, blockSize) {
+  var chars = []
+
+  var count = blockSize / 20
+  for (var c=0; c<count; c++) {
+    var char = {}
+    var off = c*20
+    char.id = buf.readUInt32LE(i + 0 + off)
+    char.x = buf.readUInt16LE(i + 4 + off)
+    char.y = buf.readUInt16LE(i + 6 + off)
+    char.width = buf.readUInt16LE(i + 8 + off)
+    char.height = buf.readUInt16LE(i + 10 + off)
+    char.xoffset = buf.readInt16LE(i + 12 + off)
+    char.yoffset = buf.readInt16LE(i + 14 + off)
+    char.xadvance = buf.readInt16LE(i + 16 + off)
+    char.page = buf.readUInt8(i + 18 + off)
+    char.chnl = buf.readUInt8(i + 19 + off)
+    chars[c] = char
+  }
+  return chars
+}
+
+function readKernings(buf, i, blockSize) {
+  var kernings = []
+  var count = blockSize / 10
+  for (var c=0; c<count; c++) {
+    var kern = {}
+    var off = c*10
+    kern.first = buf.readUInt32LE(i + 0 + off)
+    kern.second = buf.readUInt32LE(i + 4 + off)
+    kern.amount = buf.readInt16LE(i + 8 + off)
+    kernings[c] = kern
+  }
+  return kernings
+}
+
+function readNameNT(buf, offset) {
+  var pos=offset
+  for (; pos<buf.length; pos++) {
+    if (buf[pos] === 0x00) 
+      break
+  }
+  return buf.slice(offset, pos)
+}
+
+function readStringNT(buf, offset) {
+  return readNameNT(buf, offset).toString('utf8')
+}