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Procházka Lukáš Ing.

22 May 2018 22 May '18

1:25 p.m.

Hello, just curious - is threre a way how to crop a page of a PDF via ConTeXt? Ideally - to process a single page PDF into another file, with the one page cropped... Best regards, Lukas -- Ing. Lukáš Procházka | mailto:LPr@pontex.cz Pontex s. r. o. | mailto:pontex@pontex.cz | http://www.pontex.cz | IDDS:nrpt3sn Bezová 1658 147 14 Praha 4 Mob.: +420 702 033 396

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Henri Menke

23 May 23 May

9:11 a.m.

On 05/23/2018 01:25 AM, Procházka Lukáš Ing. wrote:

Hello,

just curious - is threre a way how to crop a page of a PDF via ConTeXt?

Ideally - to process a single page PDF into another file, with the one page cropped...

It's not really clear what you want. Are you looking for \start...\stopTEXpage?

Best regards,

Lukas

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Taco Hoekwater

9:25 a.m.

On 05/23/2018 01:25 AM, Procházka Lukáš Ing. wrote:

...
Hello,

just curious - is threre a way how to crop a page of a PDF via ConTeXt?

Ideally - to process a single page PDF into another file, with the one page cropped...

The ‘pdfcrop’ command from TeXLive can do that for you on the command line. It is based around ghostscript which can automatically find the crop area, then uses pdftex,luatex,or xetex to create a new pdf. It is doable to come up with a solution in ConTeXt if you do not mind specifying the cropbox manually, but automatic cropping is probably too hard for ConTeXt itself (and likely would end up duplicating pdfcrop to some extent). Best wishes, Taco

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Hans Hagen

10:09 a.m.

On 5/23/2018 11:25 AM, Taco Hoekwater wrote:

...
On 05/23/2018 01:25 AM, Procházka Lukáš Ing. wrote:

...
Hello,

just curious - is threre a way how to crop a page of a PDF via ConTeXt?

Ideally - to process a single page PDF into another file, with the one page cropped...

The ‘pdfcrop’ command from TeXLive can do that for you on the command line. It is based around ghostscript which can automatically find the crop area, then uses pdftex,luatex,or xetex to create a new pdf.

It is doable to come up with a solution in ConTeXt if you do not mind specifying the cropbox manually, but automatic cropping is probably too hard for ConTeXt itself (and likely would end up duplicating pdfcrop to some extent).

there is a script pdftrimwhite.pl in the distribution Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

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Alan Braslau

2:44 p.m.

Do these tools work vectorally, that is identify the drawing extent and adjust the boundingbox appropriately, or do they (especially gs) convert to an image and then crop? I use MP to read the pdf and then crop, but to a fixed closed path. The problem here appears to seek an autocrop. Alan On Wed, 23 May 2018 12:09:29 +0200 Hans Hagen wrote:

On 5/23/2018 11:25 AM, Taco Hoekwater wrote:

...
...
On 05/23/2018 01:25 AM, Procházka Lukáš Ing. wrote:

...
Hello,

just curious - is threre a way how to crop a page of a PDF via ConTeXt?

Ideally - to process a single page PDF into another file, with the one page cropped...

The ‘pdfcrop’ command from TeXLive can do that for you on the command line. It is based around ghostscript which can automatically find the crop area, then uses pdftex,luatex,or xetex to create a new pdf.

It is doable to come up with a solution in ConTeXt if you do not mind specifying the cropbox manually, but automatic cropping is probably too hard for ConTeXt itself (and likely would end up duplicating pdfcrop to some extent).

there is a script

pdftrimwhite.pl

in the distribution

Hans

----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________

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Taco Hoekwater

3:10 p.m.

On 23 May 2018, at 16:44, Alan Braslau wrote:

Do these tools work vectorally, that is identify the drawing extent and adjust the boundingbox appropriately, or do they (especially gs) convert to an image and then crop?

in pdfcrop, gs computes a boundingbox based on (one assumes) its internal image representation. Then it creates a /CropBox that is then read by the pdfcrop perl script to create occlusion margins for an external image include in a plain tex document. I assume pdftrimwhite does the same. That was what you wanted to know, right? Not the nitty gritty of gs’ internal calculations? Taco

I use MP to read the pdf and then crop, but to a fixed closed path. The problem here appears to seek an autocrop.

Alan

On Wed, 23 May 2018 12:09:29 +0200 Hans Hagen wrote:

...
On 5/23/2018 11:25 AM, Taco Hoekwater wrote:

...
...
On 05/23/2018 01:25 AM, Procházka Lukáš Ing. wrote:

...
Hello,

just curious - is threre a way how to crop a page of a PDF via ConTeXt?

Ideally - to process a single page PDF into another file, with the one page cropped...

The ‘pdfcrop’ command from TeXLive can do that for you on the command line. It is based around ghostscript which can automatically find the crop area, then uses pdftex,luatex,or xetex to create a new pdf.

It is doable to come up with a solution in ConTeXt if you do not mind specifying the cropbox manually, but automatic cropping is probably too hard for ConTeXt itself (and likely would end up duplicating pdfcrop to some extent).

there is a script

pdftrimwhite.pl

in the distribution

Hans

----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________

If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________

Taco Hoekwater Elvenkind BV

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participants (5)

Alan Braslau
Hans Hagen
Henri Menke
Procházka Lukáš Ing.
Taco Hoekwater