Add From<&ImageData> for ImageBrushRef

[DJMcNab]

Just a simple missing impl. I don't think this is worth making a patch for.

[nicoburns]

I think we ought to have a generic From<T> for ImageBrush<T>. That's probably inference-level breaking.

[raphlinus]

Seems fine to me.

[sagudev]

Just a simple missing impl. I don't think this is worth making a patch for.

I need patch for #148 anyway, so I will wait for this to land then prepare patch PR.

[DJMcNab]

I think we ought to have a generic From<T> for ImageBrush<T>. That's probably inference-level breaking.

To clarify, we talked about this in office hours, and the reason I haven't added this is that the generic parameter is currently more of an implementation detail (because the two forms have a lot of shared methods), than something we're formally supporting. This is all up-in-the-air as we work out Vello API/Anyrender stuff.

[sagudev]

Just a simple missing impl. I don't think this is worth making a patch for.

I need patch for #148 anyway, so I will wait for this to land then prepare patch PR.

Given that breaking stuff have landed on main in the mean time, should we backport these? I mostly need #148 for linebender/vello#1268.