question about memory management

[Stefan_Salewski]

Yes, it is not impossible. I did a short test with 
<https://www.ti.com/lit/ds/symlink/lm741.pdf>
    
    
    import gintro/[poppler, cairo]
    import std/[uri, strformat]
    
    proc main =
      # Load the PDF document
      #var fname = parseUri("file:///home/jose/Descargas/Escrituras 
Espartales.pdf")
      #var password = ""
      
      var doc = newDocumentFromFile("file:///tmp/hhh/lm741.pdf", nil)
      
      echo "Number of pages: ", doc.nPages() # Get the number of pages in the 
document
      
      var page: Page = doc.getPage(2)
      
      var imseq = getImageMapping(page)
      
      echo imseq.len
      var surface = getImage(page, 0)
      echo surface != nil
      let status = cairo.writeToPng(surface, "test.png")
      echo status
      
      #var n = 1
      #for img in page.images:
      #  echo repr img
      #  img.toPng(fmt"page_{n:.2d}.png")
      #  n += 1
    
    
    main()
    
    
    Run

And indeed I get a PNG picture, the rectangular shaped, top right from page 3. 
But the bindings would need some manual tuning. And I think I should really not 
do your homework for you. And extracting images from PDF documents have always 
the taste of stealing for me, similar as unauthorized github forks :-)