spine连接器和导出修改

2026-09-05 16:20:23 +08:00
parent 535f8d7558
commit 0bde824c88
81 changed files with 11800 additions and 1251 deletions
@@ -0,0 +1,78 @@
+import { normalize } from 'node:path'
+
+const CRC_TABLE = Array.from({ length: 256 }, (_, value) => {
+  let crc = value
+  for (let bit = 0; bit < 8; bit++) crc = (crc & 1) ? 0xedb88320 ^ (crc >>> 1) : crc >>> 1
+  return crc >>> 0
+})
+
+function crc32(data) {
+  let crc = 0xffffffff
+  for (const byte of data) crc = CRC_TABLE[(crc ^ byte) & 0xff] ^ (crc >>> 8)
+  return (crc ^ 0xffffffff) >>> 0
+}
+
+function archivePath(value) {
+  const path = normalize(String(value || '').replace(/\\/g, '/')).replace(/\\/g, '/').replace(/^\.\//, '')
+  if (!path || path.startsWith('/') || path === '..' || path.startsWith('../')) throw new Error('ZIP 文件路径无效')
+  return path
+}
+
+function dosDateTime(date = new Date()) {
+  const year = Math.max(1980, date.getFullYear())
+  return {
+    time: (date.getHours() << 11) | (date.getMinutes() << 5) | Math.floor(date.getSeconds() / 2),
+    date: ((year - 1980) << 9) | ((date.getMonth() + 1) << 5) | date.getDate(),
+  }
+}
+
+/** 创建无额外依赖的 ZIP（Store 模式）；PNG 和 .spine 本身已压缩，无需重复压缩。 */
+export function createZipArchive(files) {
+  const localParts = []
+  const centralParts = []
+  let offset = 0
+  const timestamp = dosDateTime()
+
+  for (const file of files) {
+    const name = Buffer.from(archivePath(file.name), 'utf8')
+    const data = Buffer.isBuffer(file.data) ? file.data : Buffer.from(file.data)
+    const crc = crc32(data)
+    const local = Buffer.alloc(30)
+    local.writeUInt32LE(0x04034b50, 0)
+    local.writeUInt16LE(20, 4)
+    local.writeUInt16LE(0x0800, 6)
+    local.writeUInt16LE(0, 8)
+    local.writeUInt16LE(timestamp.time, 10)
+    local.writeUInt16LE(timestamp.date, 12)
+    local.writeUInt32LE(crc, 14)
+    local.writeUInt32LE(data.length, 18)
+    local.writeUInt32LE(data.length, 22)
+    local.writeUInt16LE(name.length, 26)
+    localParts.push(local, name, data)
+
+    const central = Buffer.alloc(46)
+    central.writeUInt32LE(0x02014b50, 0)
+    central.writeUInt16LE(20, 4)
+    central.writeUInt16LE(20, 6)
+    central.writeUInt16LE(0x0800, 8)
+    central.writeUInt16LE(0, 10)
+    central.writeUInt16LE(timestamp.time, 12)
+    central.writeUInt16LE(timestamp.date, 14)
+    central.writeUInt32LE(crc, 16)
+    central.writeUInt32LE(data.length, 20)
+    central.writeUInt32LE(data.length, 24)
+    central.writeUInt16LE(name.length, 28)
+    central.writeUInt32LE(offset, 42)
+    centralParts.push(central, name)
+    offset += local.length + name.length + data.length
+  }
+
+  const centralDirectory = Buffer.concat(centralParts)
+  const end = Buffer.alloc(22)
+  end.writeUInt32LE(0x06054b50, 0)
+  end.writeUInt16LE(files.length, 8)
+  end.writeUInt16LE(files.length, 10)
+  end.writeUInt32LE(centralDirectory.length, 12)
+  end.writeUInt32LE(offset, 16)
+  return Buffer.concat([...localParts, centralDirectory, end])
+}