@ECHO OFF
SETLOCAL EnableExtensions
SET OUTDIR=InvertedOutputs
SET GS=C:\Ghostscript\bin\gswin64c.exe
REM Make the output directory under the current one, hiding errors (e.g. directory exists)
MKDIR %OUTDIR% 1>nul: 2>>&1
REM Iterate through pdf files in current directory only.
REM Do not recurse child folders, since this would find files in the output directory
FOR %%F IN (*.pdf) DO Call :DoOne "%%F"
GOTO :Done
REM a subroutine eliminates the need for deferred expansion. All expansions are echoed to the console.
REM e.g. Call :DoOne "%%F" - processes one file
:DoOne
REM %~nx1 = the file name + extension of the argument. Since ~ strips quotes, they added back here.
REM including the commands
REM -f %1 -- quotes are not used here, since %1 had to be quoted at the call site
ECHO ON
"%GS%" -o "%OUTDIR%\%~nx1" -sDEVICE=pdfwrite -c "{1 exch sub}{1 exch sub}{1 exch sub}{1 exch sub} setcolortransfer" -f %1
ECHO OFF
GOTO :EOF
:Done
Pause
