From 0fb187fff7d8296656f5a068f83afe5b4fdf34d2 Mon Sep 17 00:00:00 2001
From: "otoneko." <pineapple2006.11.2@gmail.com>
Date: Wed, 28 Oct 2026 20:32:27 +0900
Subject: [PATCH] feat: add tools/resize.ps1 for Windows

---
 AGENTS.md        |  2 +-
 README.md        |  6 +++++
 tools/resize.ps1 | 70 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 tools/resize.ps1

diff --git a/AGENTS.md b/AGENTS.md
index 4723e0b..cf787af 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -35,7 +35,7 @@ This is the main way people contribute. Add one shop end to end.
    sh tools/resize.sh /path/to/original.jpg content/shops/{shopId}/{shopId}-001.jpg
    ```
 
-   It prints the final `pixelHeight`/`pixelWidth` — record them. Off macOS use an equivalent (ImageMagick `convert -resize 800x800 -strip`, read size with `identify -format '%w %h'`).
+   It prints the final `pixelHeight`/`pixelWidth` — record them. On Windows use `powershell -ExecutionPolicy Bypass -File tools/resize.ps1 <original> <output>` (same arguments and output, no extra tools needed). On other systems use an equivalent (ImageMagick `convert -resize 800x800 -strip`, read size with `identify -format '%w %h'`).
 
 4. **Prefecture** (optional but encouraged) — the 都道府県 the shop is physically in (must end with 都/道/府/県). **Verify the real location** (search the web); do not infer from the name — a "札幌ラーメン" shop can be in Kanagawa, a 家系 shop can be in Tokyo. For a nationwide chain or any shop whose branch you cannot pin down, **omit the field entirely** rather than recording a guess.
 
diff --git a/README.md b/README.md
index ff50b9e..eb8bf93 100644
--- a/README.md
+++ b/README.md
@@ -437,6 +437,12 @@ Remove Exif and optimize the image:
 jpegtran -copy none -optimize -outfile yoshimuraya-001.jpg yoshimuraya-001.jpg
 ```
 
+On Windows, `tools/resize.ps1` does all of the above with no extra tools:
+
+```powershell
+powershell -ExecutionPolicy Bypass -File tools/resize.ps1 IMG_001.JPG ./content/shops/yoshimuraya/yoshimuraya-001.jpg
+```
+
 ## Projects using Ramen API
 
 - [yusukebe/ramen-api-example](https://github.com/yusukebe/ramen-api-example) - An example web pages with React and Cloudflare Workers.
diff --git a/tools/resize.ps1 b/tools/resize.ps1
new file mode 100644
index 0000000..105b2d5
--- /dev/null
+++ b/tools/resize.ps1
@@ -0,0 +1,70 @@
+# Windows counterpart of resize.sh, using the built-in System.Drawing instead of sips and jpegtran.
+$ErrorActionPreference = 'Stop'
+
+$cmdName = Split-Path -Leaf $PSCommandPath
+if ($args.Count -ne 2) {
+  [Console]::Error.WriteLine("Usage: $cmdName IMG_123.JPG yoshimuraya-001.jpg")
+  exit 1
+}
+
+$orgPath = $args[0]
+$newPath = $args[1]
+
+Write-Output "Move: $orgPath to $newPath"
+Move-Item -LiteralPath $orgPath -Destination $newPath -Force
+
+Write-Output "Resize and Optimize: $newPath"
+Add-Type -AssemblyName System.Drawing
+$fullPath = (Resolve-Path -LiteralPath $newPath).Path
+
+# Image.FromFile keeps the file locked, so read it into memory to be able to overwrite it in place.
+$stream = [System.IO.MemoryStream]::new([System.IO.File]::ReadAllBytes($fullPath))
+$image = [System.Drawing.Image]::FromStream($stream)
+
+# The EXIF metadata is dropped below, so bake its orientation (tag 0x0112) into the pixels.
+$orientationTag = 0x0112
+if ($image.PropertyIdList -contains $orientationTag) {
+  # EXIF orientation value -> System.Drawing.RotateFlipType
+  $rotateFlipTypes = @{
+    2 = [System.Drawing.RotateFlipType]::RotateNoneFlipX
+    3 = [System.Drawing.RotateFlipType]::Rotate180FlipNone
+    4 = [System.Drawing.RotateFlipType]::Rotate180FlipX
+    5 = [System.Drawing.RotateFlipType]::Rotate90FlipX
+    6 = [System.Drawing.RotateFlipType]::Rotate90FlipNone
+    7 = [System.Drawing.RotateFlipType]::Rotate270FlipX
+    8 = [System.Drawing.RotateFlipType]::Rotate270FlipNone
+  }
+  $orientation = [int]$image.GetPropertyItem($orientationTag).Value[0]
+  if ($rotateFlipTypes.ContainsKey($orientation)) {
+    $image.RotateFlip($rotateFlipTypes[$orientation])
+  }
+}
+
+# Same as sips -Z 800: fit the longest side to 800px, upscaling smaller images too.
+$scale = 800 / [Math]::Max($image.Width, $image.Height)
+$width = [int][Math]::Round($image.Width * $scale)
+$height = [int][Math]::Round($image.Height * $scale)
+
+# Drawing onto a new bitmap strips all metadata, like jpegtran -copy none.
+# The white fill keeps transparent areas of a PNG from turning black in the JPEG.
+$bitmap = [System.Drawing.Bitmap]::new($width, $height)
+$graphics = [System.Drawing.Graphics]::FromImage($bitmap)
+$graphics.Clear([System.Drawing.Color]::White)
+$graphics.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
+$graphics.PixelOffsetMode = [System.Drawing.Drawing2D.PixelOffsetMode]::HighQuality
+$graphics.DrawImage($image, 0, 0, $width, $height)
+$graphics.Dispose()
+$image.Dispose()
+$stream.Dispose()
+
+$jpegEncoder = [System.Drawing.Imaging.ImageCodecInfo]::GetImageEncoders() |
+  Where-Object { $_.MimeType -eq 'image/jpeg' }
+$encoderParams = [System.Drawing.Imaging.EncoderParameters]::new(1)
+$encoderParams.Param[0] = [System.Drawing.Imaging.EncoderParameter]::new([System.Drawing.Imaging.Encoder]::Quality, [long]85)
+$bitmap.Save($fullPath, $jpegEncoder, $encoderParams)
+$bitmap.Dispose()
+
+# Same format as sips -g pixelHeight -g pixelWidth.
+Write-Output $fullPath
+Write-Output "  pixelHeight: $height"
+Write-Output "  pixelWidth: $width"