[sc-dev] How to use PDF as a watermark form

[Roy Souther]

This works. Just a test and would need a lot of work to make it so an end user could just click but this is a good start.
Basicly
pdf2ps -> pstopnm (and resize) -> convert (to jpg)

#!/bin/bash

# This is a test to see if or how I can create a watermark for an OpenOffice document from a PDF file.
FILE_NAME="testfile"
THE_PDF_FILE="$FILE_NAME.pdf"
THE_JPG_FILE="$FILE_NAME.jpg"
THE_PS_FILE="$FILE_NAME.ps"

# The PPM files get numbered for each page. My test PDF has two pages.
THE_PPM_FILE="$FILE_NAME""001.ppm"
pdf2ps $THE_PDF_FILE

# I cheeted. I did all this before but without the xsize and ysize and found that the
# file came out to be 596 by 788 but that was very poor quality to I am resizing to
# get a better image.
X_SIZE=596
Y_SIZE=788

# I seem to get a really good quality image from 4x zoom. It will go higher but my
# test PDF did not get any better then that.
QUALITY=4
NEW_X_SIZE=`expr $X_SIZE \* $QUALITY`
NEW_Y_SIZE=`expr $Y_SIZE \* $QUALITY`

pstopnm -xsize $NEW_X_SIZE -ysize $NEW_Y_SIZE $THE_PS_FILE
rm $THE_PS_FILE
convert $THE_PPM_FILE $THE_JPG_FILE
rm $THE_PS_FILE
rm $THE_PPM_FILE

Roy Souther www.SiliconTao.com Let Open Source help your business move beyond. For security this message is digitally authenticated by GnuPG.

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