├── .gitignore
├── Makefile
├── wordx.sh
├── fast.c
├── README.md
└── pdf2pdf.sh


/.gitignore:
--------------------------------------------------------------------------------
1 | fastpdf
2 | 


--------------------------------------------------------------------------------
/Makefile:
--------------------------------------------------------------------------------
1 | CFLAGS=-O2
2 | all: fastpdf
3 | 
4 | fastpdf: fast.c
5 | 	g++ fast.c -o fastpdf
6 | 
7 | clean:
8 | 	rm -f fastpdf
9 | 


--------------------------------------------------------------------------------
/wordx.sh:
--------------------------------------------------------------------------------
 1 | #!/usr/bin/env bash
 2 | 
 3 | #wordx.sh
 4 | 
 5 | for file in "$@"
 6 | do
 7 | 	if file --mime-type "$file" | grep -q msword$; then
 8 | 	    echo "Converting $file"
 9 | 
10 | 		# important, update time-stamp
11 | 		mv $file "$file"x
12 | 		echo -e 'Conversion completed.\n'
13 | 
14 | 	else
15 | 	  	echo -e "Warning: Cannot convert $file, not of type .doc\n"
16 | 	fi
17 | 
18 | done
19 | 


--------------------------------------------------------------------------------
/fast.c:
--------------------------------------------------------------------------------
 1 | using namespace std;
 2 | #include <unistd.h>
 3 | #include <iostream>
 4 | 
 5 | int main()
 6 | {
 7 |   
 8 | usleep(833333);	
 9 | cout	<< "###                     (20%)\r" << std::flush;
10 | usleep(833333);	
11 | cout	<< "######                  (40%)\r" << std::flush;
12 | usleep(833333);	
13 | cout	<< "#########               (60%)\r" << std::flush;
14 | usleep(833333);	
15 | cout	<< "##############          (80%)\r" << std::flush;
16 | usleep(833333);	
17 | cout	<< "##################     (100%)\r" << std::flush;
18 | cout	<< "\n";
19 | return 0;
20 | }
21 | 
22 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # pdf2pdf
 2 | This software performs the magical pdf-to-pdf conversion popular in academic journal submission sites.
 3 | 
 4 | New speedup in version 2. Still runs in O(1) time, but now ~15% faster! 
 5 | Version 2 now requires you compile the C++ code fast.c thusly:
 6 | 
 7 | `g++ fast.c -o fastpdf`.
 8 | 
 9 | Requires imagemagick. It can probably be installed like this: 
10 | 
11 | - macOS: `brew install imagemagick`
12 | - Ubuntu: `sudo apt-get install imagemagick`
13 | 
14 | ## Usage
15 | `bash pdf2pdf.sh pdf_filename1 pdf_filename2 ...`
16 | 
17 | The software first checks whether each file is actually a pdf file, and then converts the pdf files into slightly worse pdf's. It skips any files that are not pdf.
18 | 
19 | So, the following will convert all pdf files in the current folder:
20 | `bash pdf2pdf.sh *`
21 | 
22 | ## Output
23 | Each listed pdf file will be converted to a lower-resolution pdf saved as "RandomNumber.pdf" in the current working directory.
24 | 
25 | 


--------------------------------------------------------------------------------
/pdf2pdf.sh:
--------------------------------------------------------------------------------
 1 | #!/usr/bin/env bash
 2 | 
 3 | #pdf2pdf.sh
 4 | if test $# -eq 0 ; then
 5 | 	echo "Error: pdf required for conversion to pdf"
 6 | 	exit 1
 7 | fi
 8 | 
 9 | numerrors=0
10 | 
11 | for file in "$@"
12 | do
13 | 	if file --mime-type "$file" | grep -q pdf$; then
14 | 		echo "Converting $file"
15 | 
16 | 		if [ -f ./fastpdf ]; then
17 |             if [ -x "$(command -v parallel)" ]; then 
18 |             # Use 500 processes for the conversion
19 | 			parallel ./fastpdf ::: `seq 1 1 500`
20 |             else
21 |                 ./fastpdf
22 |             fi
23 | 		else
24 | 			echo "File fastpdf does not exist. Please compile (see readme)."
25 | 			break;
26 | 		fi	
27 | 
28 | 		# important, update time-stamp
29 | 		touch "${file}"
30 | 		
31 | 		# rasterize and subtly degrade quality
32 | 		outfile=4.pdf
33 | 		convert -density 95 "${file}" -quality 95 $outfile
34 | 
35 | 		echo -e "Conversion to ${outfile} completed.\n"
36 | 
37 | 	else
38 | 		echo -e "Warning: Cannot convert $file, not of type pdf\n"
39 | 		numerrors=`expr 1 + $numerrors`
40 | 	fi
41 | 
42 | done
43 | 
44 | exit $numerrors
45 | 


--------------------------------------------------------------------------------