RFR: 8344119: CUPSPrinter does not respect PostScript printer definition specification in case of reading ImageableArea values from PPD files

[Prasanta Sadhukhan]

On Thu, 14 Nov 2024 16:15:46 GMT, GennadiyKrivoshein <duke at openjdk.org> wrote:

> **Description:**
> The PR updates sun.print.CUPSPrinter's behavior in terms of reading media imageable area values according to the PostScript Printer Description File Format Specification.
> The actual implementation reads X and Y coordinates of the upper right corner of the imageable area as width and height of the imageable area. https://bugs.openjdk.org/browse/JDK-8344119
> 
> **Updates:** 
> Added subtraction of the X and Y coordinates of the lower left corner to fix the width and height values of the imageable area.
> 
> **Tests:**
> Tested with `test/jdk/javax/print/DialogMargins.java` using Brother DCP-T720DW, the test draws a black line along the borders of the imageable area.
> The test was run with the minimum possible margins.
> _Before the fix_: the right and bottom lines are not printed (the right and bottom lines are outside the printable area).
> _After the fix_: all lines are printed.

So, how returning the correct values from JNI violate this? Even if we do the calculation in the native, we will still be returning float values for upper top, right coordinates, correct?

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PR Comment: https://git.openjdk.org/jdk/pull/22110#issuecomment-2539369493