print only last page with command line parameter

[Lutzion]

The problem

We use signature pads to sign some pdfs. Typically the fields to sign are on the last page. So we looked for a solution to just print out the last page after signing with the pad.

There are already lots of possibilities for the command line -print-settings "1-3,5,10-8,odd,fit,bin=2" but -print-settings "last" is missing

The solution

So i had a look at the code and added the missing parameter:

In SumatraDialogs.h change: enum class PrintRangeAdv { All = 0, Even, Odd, Last }; // ### LH added Range Last

SumatraDialogs.h.txt

In Print.cpp add:

line 468:

        for (DWORD pageNo = pd.ranges.at(i).nFromPage; pageNo != pd.ranges.at(i).nToPage + dir; pageNo += dir) {
            if ((PrintRangeAdv::Even == pd.advData.range && pageNo % 2 != 0) ||
                (PrintRangeAdv::Odd == pd.advData.range && pageNo % 2 == 0) ||
                (PrintRangeAdv::Last == pd.advData.range &&
                 pd.ranges.len == 1 &&
                 pageNo != pd.ranges.at(0).nToPage))
            {
                continue;
            }

and then line 1157:

        } else if (str::EqI(s, "odd")) {
            advanced.range = PrintRangeAdv::Odd;
        } else if (str::EqI(s, "last")) {           // ### LH fuer SumatraPDF.exe -print-settings "last" -print-to "PDFCreator" test.pdf
            advanced.range = PrintRangeAdv::Last;
        } else if (str::EqI(s, "noscale")) {

Print.cpp.txt

Files are attached with extension .txt, as attaching .h and .cpp is not allowed

So if you think this new option is useful, just implement it.

[GitHubRulesOK]

SumatraPDF will "print as image" and thus similar without print would be something like "mutool/cpdf/ghostscript/pdfcpu convert to image last or end".

For "printing PDF as vectorised" I would always suggest the most efficient is GhostScript -firstpage=# -lastpage=# -ooutput -f input.pdf but you will first need to use pdfinfo to detect last page # .

Here is a proof of concept, based on my answer to https://stackoverflow.com/a/75070228/10802527

NOTE "as it is" will not export/print a -lastpage if there is only 1 in the source.pdf

@echo off
REM probably don't need setlocal for this cmd file but may be needed for other downstream command manipulation
setlocal enabledelayedexpansion

set "GS_BIN=C:\Users\WDAGUtilityAccount\Desktop\Apps\PDF\gs\10.05.1\bin"

"%GS_BIN%\gswin32c.exe" -q -dBATCH -dPDFINFO "%~dpn1.pdf" 2>"%temp%\output.txt"
for /f "usebackq tokens=3" %%f in (`type "%temp%\output.txt" ^| find "pages"`) do (set /a "PAGES=0+%%f")

"%GS_BIN%\gswin32c.exe" -q -sDEVICE=pdfwrite -dFirstPage=%PAGES% -dLastPage=%PAGES% -o"%~dpn1-lastpage.pdf" -f "%~dpn1.pdf" 2>nul

pause
del "%temp%\output.txt"

[erwindon]

This solution is very specific for a certain use-case. What if the last 2 pages are needed? How about -print-settings "-1-3,...", just signal that the page numbers are counted from the end with a prefix ('-'). -1 = last page -1-3 = last 3 pages -2 = second-to-last page