math.miniapp/scripts/create-notification-icon.ps1

# Source for the white outline bell PNG. Kept as PNG for native WeChat Image support.
Add-Type -AssemblyName System.Drawing
$assetPath = Join-Path $PSScriptRoot '../src/assets/notification.png'
$bitmap = New-Object System.Drawing.Bitmap 96, 96
$canvas = [System.Drawing.Graphics]::FromImage($bitmap)
$canvas.SmoothingMode = [System.Drawing.Drawing2D.SmoothingMode]::AntiAlias
$canvas.Clear([System.Drawing.Color]::Transparent)
$canvas.ScaleTransform(4, 4)
$stroke = New-Object System.Drawing.Pen ([System.Drawing.Color]::White), 2
$stroke.StartCap = [System.Drawing.Drawing2D.LineCap]::Round
$stroke.EndCap = [System.Drawing.Drawing2D.LineCap]::Round
$stroke.LineJoin = [System.Drawing.Drawing2D.LineJoin]::Round
$outline = New-Object System.Drawing.Drawing2D.GraphicsPath
try {
  $outline.AddBezier(18, 8, 18, 4.7, 15.3, 2, 12, 2)
  $outline.AddBezier(12, 2, 8.7, 2, 6, 4.7, 6, 8)
  $outline.AddBezier(6, 8, 6, 15, 3, 16, 3, 18)
  $outline.AddLine(3, 18, 21, 18)
  $outline.AddBezier(21, 18, 21, 16, 18, 15, 18, 8)
  $outline.CloseFigure()
  $canvas.DrawPath($stroke, $outline)
  $canvas.DrawArc($stroke, 10, 18, 4, 4, 30, 120)
  $bitmap.Save($assetPath, [System.Drawing.Imaging.ImageFormat]::Png)
} finally {
  $outline.Dispose()
  $stroke.Dispose()
  $canvas.Dispose()
  $bitmap.Dispose()
}