export async function convertIcoToPng(file) {
    // 1. 创建ICO的Blob URL
    const icoUrl = URL.createObjectURL(file)
    
    // 2. 加载到Image对象
    const img = await new Promise((resolve, reject) => {
      const img = new Image()
      img.onload = () => resolve(img)
      img.onerror = reject
      img.src = icoUrl
    })
  
    // 3. 绘制到Canvas
    const canvas = document.createElement('canvas')
    canvas.width = img.width
    canvas.height = img.height
    const ctx = canvas.getContext('2d')
    ctx.drawImage(img, 0, 0)
  
    // 4. 转换为PNG
    const pngDataUrl = canvas.toDataURL('image/png')
    URL.revokeObjectURL(icoUrl) // 释放内存
    
    return {
      dataUrl: pngDataUrl,
      width: img.width,
      height: img.height
    }
  }