convert pdf to png

[Carl K]

I need to take the take the pdf output from reportlab and create a preview image
for a web page. so png or something. I am sure ghostscript will be involved.
I am guessing PIL or ImageMagic ?

all sugestions welcome.

Carl K

[Ramsey Nasser]

On Dec 24, 2007 7:53 AM, Carl K <ca**@personnel ware.comwrote:

I need to take the take the pdf output from reportlab and create a preview image
for a web page. so png or something. I am sure ghostscript will be involved.
I am guessing PIL or ImageMagic ?

all sugestions welcome.

Carl K
--
http://mail.python.org/mailman/listinfo/python-list

PIL's support for pdf files is write only, so thats out of the question.

I just tried ImageMagik from the console and it converted a pdf into
png in a snap, so that seems to be your best bet.

--
nasser

[Jaap Spies]

Carl K wrote:

I need to take the take the pdf output from reportlab and create a
preview image for a web page. so png or something. I am sure
ghostscript will be involved. I am guessing PIL or ImageMagic ?

all sugestions welcome.

If it is a multi page pdf Imagemagick will do:

convert file.pdf page-%03d.png

Jaap

[Carl K]

Jaap Spies wrote:

Carl K wrote:

>I need to take the take the pdf output from reportlab and create a
preview image for a web page. so png or something. I am sure
ghostscript will be involved. I am guessing PIL or ImageMagic ?

all sugestions welcome.

If it is a multi page pdf Imagemagick will do:

convert file.pdf page-%03d.png

I need python code to do this. It is going to be run on a someone else's shared
host web server, security and performance is an issue. So I would rather not
run stuff via popen. I also need something that is easy to install. (either
easy_install or a distro package)

I just looked at what it takes to install PythonMagick:

Requists for installation is:
boost
boost-python
python 2.5
Magick++ (>= 6.2)
and for building:
pkg-config
libtool
make

That is looking like maybe "not easy to install"

so I need to make an easy_install-able .tgz or some other way of making the image.

Carl K

[Grant Edwards]

On 2007-12-24, Carl K <ca**@personnel ware.comwrote:

>If it is a multi page pdf Imagemagick will do:

convert file.pdf page-%03d.png

I need python code to do this. It is going to be run on a
someone else's shared host web server, security and
performance is an issue. So I would rather not run stuff via
popen.

Use subprocess.

Trying to eliminate popen because of the overhead when running
ghostscript to render PDF (I assume convert uses gs?) is about
like trimming an elephants toenails to save weight.

I also need something that is easy to install. (either
easy_install or a distro package)

That's a problem.

--
Grant

[Carl K]

Grant Edwards wrote:

On 2007-12-24, Carl K <ca**@personnel ware.comwrote:

>>If it is a multi page pdf Imagemagick will do:

convert file.pdf page-%03d.png

I need python code to do this. It is going to be run on a
someone else's shared host web server, security and
performance is an issue. So I would rather not run stuff via
popen.

Use subprocess.

Trying to eliminate popen because of the overhead when running
ghostscript to render PDF (I assume convert uses gs?) is about
like trimming an elephants toenails to save weight.

maybe, but I wouldn't be so sure.

currently the pdf is created in a python StringIO buffer and returned to the
browser; so it never becomes a file. using convert means I have to first save
it as a file, convert from file to file, read the file, delete the 2 files. so 6
file operations where before there were none. That may be more of a load than
the ghostscript part.

Carl K

[Jaap Spies]

Carl K wrote:

Grant Edwards wrote:

>On 2007-12-24, Carl K <ca**@personnel ware.comwrote:

>>>If it is a multi page pdf Imagemagick will do:

convert file.pdf page-%03d.png
I need python code to do this. It is going to be run on a
someone else's shared host web server, security and
performance is an issue. So I would rather not run stuff via
popen.

Use subprocess.

Trying to eliminate popen because of the overhead when running
ghostscript to render PDF (I assume convert uses gs?) is about
like trimming an elephants toenails to save weight.

maybe, but I wouldn't be so sure.

currently the pdf is created in a python StringIO buffer and returned to
the browser; so it never becomes a file. using convert means I have to
first save it as a file, convert from file to file, read the file,
delete the 2 files. so 6 file operations where before there were none.
That may be more of a load than the ghostscript part.

Carl K

Are you clever and am I stupid? I did not read this in your original post!

Jaap

[Andrew MacIntyre]

Grant Edwards wrote:

On 2007-12-24, Carl K <ca**@personnel ware.comwrote:

>>If it is a multi page pdf Imagemagick will do:

convert file.pdf page-%03d.png

I need python code to do this. It is going to be run on a
someone else's shared host web server, security and
performance is an issue. So I would rather not run stuff via
popen.

Use subprocess.

Trying to eliminate popen because of the overhead when running
ghostscript to render PDF (I assume convert uses gs?) is about
like trimming an elephants toenails to save weight.

Using ctypes to call Ghostscript's API also works well. I've only done
this on Windows, but it should also work on other systems with ctypes
support.

--
-------------------------------------------------------------------------
Andrew I MacIntyre "These thoughts are mine alone..."
E-mail: an*****@bullsey e.apana.org.au (pref) | Snail: PO Box 370
an*****@pcug.or g.au (alt) | Belconnen ACT 2616
Web: http://www.andymac.org/ | Australia

[Carl K]

Andrew MacIntyre wrote:

Grant Edwards wrote:

>On 2007-12-24, Carl K <ca**@personnel ware.comwrote:

>>>If it is a multi page pdf Imagemagick will do:

convert file.pdf page-%03d.png
I need python code to do this. It is going to be run on a
someone else's shared host web server, security and
performance is an issue. So I would rather not run stuff via
popen.

Use subprocess.

Trying to eliminate popen because of the overhead when running
ghostscript to render PDF (I assume convert uses gs?) is about
like trimming an elephants toenails to save weight.

Using ctypes to call Ghostscript's API also works well. I've only done
this on Windows, but it should also work on other systems with ctypes
support.

sounds good, but I have 0.0 clue what that actually means.

Can you give me what you did with windows in hopes that I can figure out how to
do it in Linux? I am guessing it shouldn't be to different. (well, hoping...)

Carl K

[Carl K]

Jaap Spies wrote:

Carl K wrote:

>Grant Edwards wrote:

>>On 2007-12-24, Carl K <ca**@personnel ware.comwrote:

If it is a multi page pdf Imagemagick will do:
>
convert file.pdf page-%03d.png
I need python code to do this. It is going to be run on a
someone else's shared host web server, security and
performanc e is an issue. So I would rather not run stuff via
popen.

Use subprocess.

Trying to eliminate popen because of the overhead when running
ghostscript to render PDF (I assume convert uses gs?) is about
like trimming an elephants toenails to save weight.

maybe, but I wouldn't be so sure.

currently the pdf is created in a python StringIO buffer and returned
to the browser; so it never becomes a file. using convert means I
have to first save it as a file, convert from file to file, read the
file, delete the 2 files. so 6 file operations where before there were
none. That may be more of a load than the ghostscript part.

Carl K

Are you clever and am I stupid? I did not read this in your original post!

Here is what the code looks like that generates the pdf:

buffer = StringIO()
rw = dReportWriter(O utputFile=buffe r, ReportFormFile= xmlfile, Cursor=ds)
rw.write()
pdf = buffer.getvalue ()
return pdf

Carl K