# Genere les icones PNG du lanceur, pour Android < 8 qui ignore les icones
# adaptatives. Meme dessin que les vecteurs de android-res\drawable :
# cadenas cyan sur ardoise.
#
# A relancer seulement si le dessin change ; les PNG sont suivis par git.

$ErrorActionPreference = 'Stop'
Add-Type -AssemblyName System.Drawing

$root = Join-Path $PSScriptRoot 'android-res'
$bg   = [System.Drawing.Color]::FromArgb(255, 15, 23, 42)     # #0F172A
$fg   = [System.Drawing.Color]::FromArgb(255, 59, 130, 246)   # #3B82F6

# densite -> cote en pixels, tel qu'Android les attend
$sizes = @{ 'drawable-ldpi' = 36; 'drawable-mdpi' = 48; 'drawable-hdpi' = 72
            'drawable-xhdpi' = 96; 'drawable-xxhdpi' = 144; 'drawable-xxxhdpi' = 192 }

foreach ($dir in $sizes.Keys) {
    $n = $sizes[$dir]
    $out = Join-Path $root $dir
    New-Item -ItemType Directory -Force $out | Out-Null

    $bmp = New-Object System.Drawing.Bitmap $n, $n
    $g = [System.Drawing.Graphics]::FromImage($bmp)
    $g.SmoothingMode = 'AntiAlias'

    # Fond : carre arrondi. Les vieux lanceurs ne masquent pas, donc l'icone
    # doit porter sa propre forme.
    $r = [int]($n * 0.22)
    $path = New-Object System.Drawing.Drawing2D.GraphicsPath
    $path.AddArc(0, 0, 2*$r, 2*$r, 180, 90)
    $path.AddArc($n-2*$r-1, 0, 2*$r, 2*$r, 270, 90)
    $path.AddArc($n-2*$r-1, $n-2*$r-1, 2*$r, 2*$r, 0, 90)
    $path.AddArc(0, $n-2*$r-1, 2*$r, 2*$r, 90, 90)
    $path.CloseFigure()
    $g.FillPath((New-Object System.Drawing.SolidBrush $bg), $path)

    # Echelle : le dessin vectoriel vit dans un carre de 108.
    $u = $n / 108.0
    $brush = New-Object System.Drawing.SolidBrush $fg
    $pen = New-Object System.Drawing.Pen $fg, ([float](5.5 * $u))
    $pen.StartCap = 'Round'; $pen.EndCap = 'Round'

    # Anse : demi-cercle ouvert vers le bas, puis deux montants.
    $g.DrawArc($pen, [float](44*$u), [float](37*$u), [float](20*$u), [float](20*$u), 180, 180)
    $g.DrawLine($pen, [float](44*$u), [float](47*$u), [float](44*$u), [float](56*$u))
    $g.DrawLine($pen, [float](64*$u), [float](47*$u), [float](64*$u), [float](56*$u))

    # Corps
    $body = New-Object System.Drawing.Drawing2D.GraphicsPath
    $bx = 34*$u; $by = 54*$u; $bw = 40*$u; $bh = 26*$u; $br = 4*$u
    $body.AddArc([float]$bx, [float]$by, [float](2*$br), [float](2*$br), 180, 90)
    $body.AddArc([float]($bx+$bw-2*$br), [float]$by, [float](2*$br), [float](2*$br), 270, 90)
    $body.AddArc([float]($bx+$bw-2*$br), [float]($by+$bh-2*$br), [float](2*$br), [float](2*$br), 0, 90)
    $body.AddArc([float]$bx, [float]($by+$bh-2*$br), [float](2*$br), [float](2*$br), 90, 90)
    $body.CloseFigure()
    $g.FillPath($brush, $body)

    # Serrure, evidee dans la couleur du fond
    $bgBrush = New-Object System.Drawing.SolidBrush $bg
    $g.FillEllipse($bgBrush, [float](50*$u), [float](58*$u), [float](8*$u), [float](8*$u))
    $g.FillRectangle($bgBrush, [float](52.4*$u), [float](64*$u), [float](3.2*$u), [float](9*$u))

    $g.Dispose()
    $bmp.Save((Join-Path $out 'ic_launcher.png'), [System.Drawing.Imaging.ImageFormat]::Png)
    $bmp.Dispose()
    "{0,-20} {1}x{1}" -f $dir, $n
}