hello worlds

tools/resize-images.ps1

@@ -0,0 +1,174 @@
+param(
+    [Parameter(Mandatory = $true)]
+    [string]$InputPath,
+
+    [ValidateSet("logo", "masthead", "feature", "card", "gallery", "banner", "platform-icon", "profile")]
+    [string]$Preset = "gallery",
+
+    [string]$OutputDir = "public/img/generated",
+
+    [string]$OutputName = ""
+)
+
+$ErrorActionPreference = "Stop"
+
+$repoRoot = Resolve-Path (Join-Path $PSScriptRoot "..")
+$resolvedInput = Resolve-Path $InputPath
+
+if ([System.IO.Path]::IsPathRooted($OutputDir)) {
+    $resolvedOutputDir = $OutputDir
+}
+else {
+    $resolvedOutputDir = Join-Path $repoRoot $OutputDir
+}
+
+New-Item -ItemType Directory -Path $resolvedOutputDir -Force | Out-Null
+
+$presets = @{
+    logo = @{
+        Width = 1200
+        Height = 0
+        Mode = "fit"
+        Suffix = "logo"
+    }
+    masthead = @{
+        Width = 860
+        Height = 0
+        Mode = "fit"
+        Suffix = "masthead"
+    }
+    feature = @{
+        Width = 900
+        Height = 506
+        Mode = "crop"
+        Suffix = "feature"
+    }
+    card = @{
+        Width = 600
+        Height = 338
+        Mode = "crop"
+        Suffix = "card"
+    }
+    gallery = @{
+        Width = 480
+        Height = 270
+        Mode = "crop"
+        Suffix = "gallery"
+    }
+    banner = @{
+        Width = 1920
+        Height = 1080
+        Mode = "crop"
+        Suffix = "banner"
+    }
+    "platform-icon" = @{
+        Width = 256
+        Height = 256
+        Mode = "pad"
+        Suffix = "platform-icon"
+    }
+    profile = @{
+        Width = 512
+        Height = 512
+        Mode = "crop"
+        Suffix = "profile"
+    }
+}
+
+function Get-ImageFiles {
+    param([string]$Path)
+
+    $item = Get-Item -LiteralPath $Path
+
+    if ($item.PSIsContainer) {
+        return Get-ChildItem -LiteralPath $Path -File |
+            Where-Object { $_.Extension -match "^\.(png|jpg|jpeg|bmp)$" }
+    }
+
+    return @($item)
+}
+
+function Resize-Image {
+    param(
+        [string]$SourcePath,
+        [string]$DestinationPath,
+        [int]$TargetWidth,
+        [int]$TargetHeight,
+        [string]$Mode
+    )
+
+    Add-Type -AssemblyName System.Drawing
+
+    $image = [System.Drawing.Image]::FromFile($SourcePath)
+
+    if ($TargetHeight -eq 0) {
+        $TargetHeight = [int][Math]::Round($image.Height * $TargetWidth / $image.Width)
+    }
+
+    $bitmap = New-Object System.Drawing.Bitmap $TargetWidth, $TargetHeight
+    $graphics = [System.Drawing.Graphics]::FromImage($bitmap)
+
+    $graphics.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
+    $graphics.SmoothingMode = [System.Drawing.Drawing2D.SmoothingMode]::HighQuality
+    $graphics.PixelOffsetMode = [System.Drawing.Drawing2D.PixelOffsetMode]::HighQuality
+    $graphics.CompositingQuality = [System.Drawing.Drawing2D.CompositingQuality]::HighQuality
+    $graphics.Clear([System.Drawing.Color]::Transparent)
+
+    if ($Mode -eq "crop") {
+        $scale = [Math]::Max($TargetWidth / $image.Width, $TargetHeight / $image.Height)
+        $sourceWidth = [int][Math]::Round($TargetWidth / $scale)
+        $sourceHeight = [int][Math]::Round($TargetHeight / $scale)
+        $sourceX = [int][Math]::Max(0, [Math]::Round(($image.Width - $sourceWidth) / 2))
+        $sourceY = [int][Math]::Max(0, [Math]::Round(($image.Height - $sourceHeight) / 2))
+
+        $sourceRect = New-Object System.Drawing.Rectangle $sourceX, $sourceY, $sourceWidth, $sourceHeight
+        $destRect = New-Object System.Drawing.Rectangle 0, 0, $TargetWidth, $TargetHeight
+        $graphics.DrawImage($image, $destRect, $sourceRect, [System.Drawing.GraphicsUnit]::Pixel)
+    }
+    elseif ($Mode -eq "pad") {
+        $scale = [Math]::Min($TargetWidth / $image.Width, $TargetHeight / $image.Height)
+        $drawWidth = [int][Math]::Round($image.Width * $scale)
+        $drawHeight = [int][Math]::Round($image.Height * $scale)
+        $drawX = [int][Math]::Round(($TargetWidth - $drawWidth) / 2)
+        $drawY = [int][Math]::Round(($TargetHeight - $drawHeight) / 2)
+
+        $destRect = New-Object System.Drawing.Rectangle $drawX, $drawY, $drawWidth, $drawHeight
+        $graphics.DrawImage($image, $destRect)
+    }
+    else {
+        $graphics.DrawImage($image, 0, 0, $TargetWidth, $TargetHeight)
+    }
+
+    $bitmap.Save($DestinationPath, [System.Drawing.Imaging.ImageFormat]::Png)
+
+    $graphics.Dispose()
+    $bitmap.Dispose()
+    $image.Dispose()
+}
+
+$presetConfig = $presets[$Preset]
+$files = Get-ImageFiles -Path $resolvedInput
+
+foreach ($file in $files) {
+    $name = if ($OutputName -and $files.Count -eq 1) {
+        $OutputName
+    }
+    else {
+        "{0}-{1}.png" -f $file.BaseName, $presetConfig.Suffix
+    }
+
+    if ([System.IO.Path]::GetExtension($name) -eq "") {
+        $name = "$name.png"
+    }
+
+    $destination = Join-Path $resolvedOutputDir $name
+
+    Resize-Image `
+        -SourcePath $file.FullName `
+        -DestinationPath $destination `
+        -TargetWidth $presetConfig.Width `
+        -TargetHeight $presetConfig.Height `
+        -Mode $presetConfig.Mode
+
+    Write-Output ("{0} -> {1}" -f $file.Name, $destination)
+}