B4J Question Calculate metric of an image

[focus330]

Hi

I have to save an image ( canvas object).
It's a photo that must result with specific metric ( 4 cm x 3 cm) when printed.
How can I do it ?
Thanks

 

[Erel]

You should use this library to print: https://www.b4x.com/android/forum/threads/b4j-print-javafx8.49836/#content

I never worked with this library. I see that the native API allows you to get the printer resolution: http://docs.oracle.com/javase/8/javafx/api/index.html?javafx/print/Printer.html
You can probably use it to find the required scale.

 

[focus330]

Thanks Erel.
I don't know if it'll be useful.
I have to study it more but it seems that I can only use with defined standard papers ( A3, A4, ecc ).
It seems no possible to create my own layout by code.