Add reusable DZI tile generator script

[mattleibow]

DZI Tile Generator

A reusable .NET 10 file-based app (scripts/generate-dzi.cs) that generates Deep Zoom Image (DZI) tile pyramids from any source image using SkiaSharp.

Usage

dotnet run --file scripts/generate-dzi.cs -- <input-image> <output.dzi> [options]

# Example — generate from a JPEG with JPEG tiles:
dotnet run --file scripts/generate-dzi.cs -- myphoto.jpg output/myphoto.dzi --format jpg --quality 85

# Example — PNG tiles with overlap:
dotnet run --file scripts/generate-dzi.cs -- gigapixel.tiff output/gigapixel.dzi --tile-size 256 --overlap 1

Options

Option	Default	Description
--tile-size	256	Tile size in pixels
--overlap	1	Tile overlap in pixels
--format	png	Output format: png or jpg
--quality	90	JPEG quality (1–100)

How it works

• Computes maxLevel = ceil(log2(max(width, height)))
• Generates all levels 0 → maxLevel (level 0 is 1×1, each level doubles)
• Writes tile files to {output}_files/{level}/{col}_{row}.{format}
• Writes DZI XML descriptor at the output path

Requirements

• .NET 10 SDK (uses file-based apps feature)
• SkiaSharp is auto-restored via the #:package directive — no project file needed

[github-actions]

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[mattleibow]

Superseded by PR #381 which includes both the generator script and the regenerated 16-level testgrid (32768×32768).