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I think ImageMagick works on all platforms.
Say you have three columns?
Run it 3 times with different margin settings.
Note on Linux (and maybe Mac) the default security forbids PDF. Reading & writing PDF has different settings. I only enable writing and use The GIMP to convert a PDF at desired resolution to a stack of images then Exported in reverse order as mpng (animated png) for ImageMagick to read.
For quadrants you read the same source 4 times with different margins.
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