You are viewing a plain text version of this content. The canonical link for it is here.
Posted to fop-users@xmlgraphics.apache.org by Martin Edge <Ma...@intellimail.com.au> on 2012/09/06 11:46:45 UTC
PNG's embedded in PDFs, which are converted using PDF Image
Hi,
Wondering if I could get some advice on how to address the issue whereby if
a PNG is used within a PDF with a transparent background, and that image is
then put within a PDF, where then we rely on pdf-image to convert (because
ultimately I want to have the output use the less printer-resource hungry
postscript) - that the transparency is converted to a black colour.
Obviously the easiest answer is to just not use transparency, but I am
dealing with PDFs supplied from external clients, so it would be better if I
have a way of managing this.
Ultimately what I am using this for is to generate flyer sheets for
printing, where I am taking a base PDF as initial artwork, and then adding
personalised address information for each recipient.
Thanks in advance,
Martin
Description: Description: intellimail_logo_small
Martin Edge
Re: PNG's embedded in PDFs, which are converted using PDF Image
Posted by Luis Bernardo <lm...@gmail.com>.
Transparency support is PostScript is very limited (this is not a FOP
limitation but a PostScript limitation). If I understood well you are
generating PostScript before sending to the printer. I think that is the
issue.
On Thu, Sep 6, 2012 at 11:07 AM, Martin Edge <Martin.Edge@intellimail.com.au
> wrote:
> Thanks Mehdi - it does help :-)
>
>
>
> ---------------
> Martin Edge
> ---------------
>
> On 06/09/2012, at 8:05 PM, mehdi houshmand <me...@gmail.com> wrote:
>
> Hi Martin,
>
> I think we had a look at this issue at some point last year, as far as I
> remember, transparencies aren't very well supported with the pdf-image
> plugin. I think the best way to implement them would be to use transparency
> groups to that you can better control layered transparencies. However, I
> haven't looked at how easy/hard any of this would be to implement.
>
> We investigated this a long time ago, so I could be wrong, but from your
> findings it looks like I'm not far off the mark.
>
> Sorry if that's not really of any help to you,
>
> Mehdi
>
> On 6 September 2012 10:46, Martin Edge <Ma...@intellimail.com.au>wrote:
>
>> Hi,****
>>
>> ** **
>>
>> Wondering if I could get some advice on how to address the issue whereby
>> if a PNG is used within a PDF with a transparent background, and that image
>> is then put within a PDF, where then we rely on pdf-image to convert
>> (because ultimately I want to have the output use the less printer-resource
>> hungry postscript) – that the transparency is converted to a black colour.
>> ****
>>
>> ** **
>>
>> Obviously the easiest answer is to just not use transparency, but I am
>> dealing with PDFs supplied from external clients, so it would be better if
>> I have a way of managing this.****
>>
>> ** **
>>
>> Ultimately what I am using this for is to generate flyer sheets for
>> printing, where I am taking a base PDF as initial artwork, and then adding
>> personalised address information for each recipient. ****
>>
>> ** **
>>
>> Thanks in advance,****
>>
>> Martin****
>>
>> ** **
>>
>> <image001.jpg>****
>>
>> *Martin Edge*
>>
>>
>>
>> ****
>>
>> ** **
>>
>> ** **
>>
>
>
Re: PNG's embedded in PDFs, which are converted using PDF Image
Posted by Martin Edge <Ma...@intellimail.com.au>.
Thanks Mehdi - it does help :-)
---------------
Martin Edge
---------------
On 06/09/2012, at 8:05 PM, mehdi houshmand <me...@gmail.com> wrote:
> Hi Martin,
>
> I think we had a look at this issue at some point last year, as far as I remember, transparencies aren't very well supported with the pdf-image plugin. I think the best way to implement them would be to use transparency groups to that you can better control layered transparencies. However, I haven't looked at how easy/hard any of this would be to implement.
>
> We investigated this a long time ago, so I could be wrong, but from your findings it looks like I'm not far off the mark.
>
> Sorry if that's not really of any help to you,
>
> Mehdi
>
> On 6 September 2012 10:46, Martin Edge <Ma...@intellimail.com.au> wrote:
> Hi,
>
>
>
> Wondering if I could get some advice on how to address the issue whereby if a PNG is used within a PDF with a transparent background, and that image is then put within a PDF, where then we rely on pdf-image to convert (because ultimately I want to have the output use the less printer-resource hungry postscript) – that the transparency is converted to a black colour.
>
>
>
> Obviously the easiest answer is to just not use transparency, but I am dealing with PDFs supplied from external clients, so it would be better if I have a way of managing this.
>
>
>
> Ultimately what I am using this for is to generate flyer sheets for printing, where I am taking a base PDF as initial artwork, and then adding personalised address information for each recipient.
>
>
>
> Thanks in advance,
>
> Martin
>
>
>
> <image001.jpg>
>
> Martin Edge
>
>
>
>
>
>
>
>
>
Re: PNG's embedded in PDFs, which are converted using PDF Image
Posted by mehdi houshmand <me...@gmail.com>.
Hi Martin,
I think we had a look at this issue at some point last year, as far as I
remember, transparencies aren't very well supported with the pdf-image
plugin. I think the best way to implement them would be to use transparency
groups to that you can better control layered transparencies. However, I
haven't looked at how easy/hard any of this would be to implement.
We investigated this a long time ago, so I could be wrong, but from your
findings it looks like I'm not far off the mark.
Sorry if that's not really of any help to you,
Mehdi
On 6 September 2012 10:46, Martin Edge <Ma...@intellimail.com.au>wrote:
> Hi,****
>
> ** **
>
> Wondering if I could get some advice on how to address the issue whereby
> if a PNG is used within a PDF with a transparent background, and that image
> is then put within a PDF, where then we rely on pdf-image to convert
> (because ultimately I want to have the output use the less printer-resource
> hungry postscript) – that the transparency is converted to a black colour.
> ****
>
> ** **
>
> Obviously the easiest answer is to just not use transparency, but I am
> dealing with PDFs supplied from external clients, so it would be better if
> I have a way of managing this.****
>
> ** **
>
> Ultimately what I am using this for is to generate flyer sheets for
> printing, where I am taking a base PDF as initial artwork, and then adding
> personalised address information for each recipient. ****
>
> ** **
>
> Thanks in advance,****
>
> Martin****
>
> ** **
>
> [image: Description: Description: intellimail_logo_small]****
>
> *Martin Edge*
>
>
>
> ****
>
> ** **
>
> ** **
>