# Disegna la lamiera di un pannello: fondo chiaro sfumato, cornice e viti
# agli angoli. Usato per gli sfondi delle plance di esempio.
#
#   powershell -File genera-sfondo.ps1 -Out ..\immagini\sfondo.png -W 1270 -H 950

param(
    [string]$Out = 'D:\dev\Plancia\Console\immagini\antago-sfondo.png',
    [int]$W = 1270,
    [int]$H = 950
)

Add-Type -AssemblyName System.Drawing

$bmp = New-Object System.Drawing.Bitmap($W, $H, [System.Drawing.Imaging.PixelFormat]::Format32bppArgb)
$g = [System.Drawing.Graphics]::FromImage($bmp)
$g.SmoothingMode = 'AntiAlias'

# Lamiera verniciata: bianco sporco con una leggerissima ombreggiatura verticale.
$rect = New-Object System.Drawing.Rectangle(0, 0, $W, $H)
$c1 = [System.Drawing.Color]::FromArgb(255, 246, 246, 243)
$c2 = [System.Drawing.Color]::FromArgb(255, 226, 227, 224)
$br = New-Object System.Drawing.Drawing2D.LinearGradientBrush($rect, $c1, $c2, 90.0)
$g.FillRectangle($br, $rect)

# Cornice del pannello
$pen = New-Object System.Drawing.Pen ([System.Drawing.Color]::FromArgb(255, 120, 122, 120)), 3
$g.DrawRectangle($pen, 6, 6, ($W - 13), ($H - 13))
$pen2 = New-Object System.Drawing.Pen ([System.Drawing.Color]::FromArgb(90, 255, 255, 255)), 1
$g.DrawRectangle($pen2, 10, 10, ($W - 21), ($H - 21))

# Viti agli angoli
$screwFill = New-Object System.Drawing.SolidBrush ([System.Drawing.Color]::FromArgb(255, 176, 178, 176))
$screwEdge = New-Object System.Drawing.Pen ([System.Drawing.Color]::FromArgb(255, 110, 112, 110)), 2
$slot = New-Object System.Drawing.Pen ([System.Drawing.Color]::FromArgb(255, 90, 92, 90)), 3
foreach ($p in @(@(26, 26), @(($W - 46), 26), @(26, ($H - 46)), @(($W - 46), ($H - 46)))) {
    $x = $p[0]
    $y = $p[1]
    $g.FillEllipse($screwFill, $x, $y, 20, 20)
    $g.DrawEllipse($screwEdge, $x, $y, 20, 20)
    $g.DrawLine($slot, ($x + 4), ($y + 14), ($x + 16), ($y + 6))
}

$g.Dispose()
$bmp.Save($Out, [System.Drawing.Imaging.ImageFormat]::Png)
$bmp.Dispose()
Write-Output ("{0}  {1}x{2}" -f $Out, $W, $H)