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iron-software / IronSoftware.System.Drawing

An open-source System.Drawing.Common replacement for .NET 5 and above on all platforms. Bringing together System.Drawing, Maui, and ImageSharp's Bitmap, Image, Font, and Shape types via an agnostic free NuGet package.
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What is the relationship to ImageSharp? #23

Closed brandscill closed 1 year ago

brandscill commented 1 year ago

Hi,

I am a little confused about the relationship to ImageSharp, I actually got an email from IronSoftware about this library being a free open source library, but it seems it also has a split license because of the reliance on ImageSharp.

Can someone explain why there is a dependency with ImageSharp and if that's the reason for the more restrictive licensing?

michael-ironsoftware commented 1 year ago

ImageSharp is a transitive NuGet dependency - that is the relationship. Imagesharp is open source and free for many, but not all users:

Source: https://github.com/SixLabors/ImageSharp/blob/main/LICENSE#L34 (16 Dec 2022)

  Works in Source or Object form are licensed to You under the Apache License, Version 2.0 if.

 - You are consuming the Work in for use in software licensed under an Open Source or Source Available license.
   - You are consuming the Work as a Transitive Package Dependency.
   - You are consuming the Work as a Direct Package Dependency in the capacity of a For-profit company/individual with
     less than 1M USD annual gross revenue.
   - You are consuming the Work as a Direct Package Dependency in the capacity of a Non-profit organization
     or Registered Charity.

ImageSharp is free as a Transitive Package Dependency in an open source project. This is how our users will be implementing it in most cases - which applies the free and permissive Apache license to ImageSharp to their usage of image sharp. Most IronDrawing users will have ImageSharp as a Transitive Package Dependency.

Package dependency tree:

E.g. You reference IronDrawing in your product. Then IronDrawing references ImageSharp. A dependency of a dependency…a transitive dependency. So are licensed under the free Apache license.