[reportlab-users] Generate a Jpeg image from a PDF File done by reportlab

[Dani Reguera]

>it is easier if you create files, but here is how I do it all in memory:



Hi Carl,

The pdf contents are images and text, but this images is generated by my. I
have this images in my pc and only I put them in the canvas.

How could I do in a easier way?

Thx so much

2009/12/2 Carl Karsten <carl at personnelware.com>


> On Wed, Dec 2, 2009 at 10:07 AM, Dani Reguera <drbakhache at gmail.com>

> wrote:

> > Hi everybody,

> >

> > I have a problem with a pdf file generated with reportlab, maybe anyone

> > could help me. I have generated a file in reportlab, and now I want to

> make

> > a thumbnail image, the format doesn't  matter (png or jpeg) and I'm

> trying

> > with ghostscript (GS) and ImageMagick, but the problem is that GS tells

> me

> > that it's and error. Seems that the pdf generated by reportlab is

> > corrupted... could be that the pdf format is PDF-1.3?

> >

> > Is in reportlab a way to generate a jpg image or export apdf file to a

> jpg

> > image?

> >

> > Any suggestion or help will be appreciated.

> >

>

> it is easier if you create files, but here is how I do it all in memory:

>

>    # get pdf

>    pdf = mkpdf(ds,sample=True)

>

>    # render pdf onto pixbuf

>    pixbuf = Pixbuf(COLORSPACE_RGB,False,8,286,225)

>    doc = poppler.document_new_from_data(pdf,len(pdf),password='')

>    page0=doc.get_page(0)

>    page0.render_to_pixbuf(0,0,8,11,1,0,pixbuf)

>

>    # save pixbuf as png

>    # There has to be a better way to get the image?

>    lst=[]

>    pixbuf.save_to_callback(lambda b,l: l.append(b), 'png', user_data=lst)

>    png=''.join(lst)

>

>    return png

>

>

>

> http://bazaar.launchpad.net/~mdipierro/web2conf/devel/annotate/head%3A/controllers/badge.py#L68<http://bazaar.launchpad.net/%7Emdipierro/web2conf/devel/annotate/head%3A/controllers/badge.py#L68>

>

> Works, but that .join() bothers me.  I think it is because I feel like

> I am using string/char functions on bytes. which are the same thing,

> mostly.. but... I have issues.

>

>

> --

> Carl K

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>




-- 

Dani Reguera
dreguera at tagzania.com

Tagzania Services [www.tagzania-services.com]
Azitaingo Industrialdea 3 K
E-20600 Eibar
Tel: (+34) 943 82 17 80
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