[NTG-context] hard clipping in ConTeXt?

[NTG-context] hard clipping in ConTeXt?

[Pablo Rodriguez via ntg-context]

Dear list,

I have the following sample:

  \setuplayout[page]
  \starttext
    \clip[hoffset=5mm, voffset=5mm, width=15mm, height=15mm]
        {\externalfigure[xml-mkiv.pdf]}
  \stopnotmode
  \stoptext

Using PDF.js (from current Firefox), xpdf, Evince, mupdf-gl, the viewer
is able to find "dealing", altough it cannot be displayed.

Okular and Sumatra (with Wine in Linux) are not able to find "dealing".

Is there any way to have a hard clipping in ConTeXt?

I mean, that only the contents of the clipped section is added to the
resulting PDF document?

Many thanks for your help,

Pablo
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[NTG-context] Re: hard clipping in ConTeXt?

[Hans Hagen via ntg-context]

On 11/10/2023 6:17 PM, Pablo Rodriguez via ntg-context wrote:
> Dear list,
> 
> I have the following sample:
> 
>    \setuplayout[page]
>    \starttext
>      \clip[hoffset=5mm, voffset=5mm, width=15mm, height=15mm]
>          {\externalfigure[xml-mkiv.pdf]}
>    \stopnotmode
>    \stoptext
> 
> Using PDF.js (from current Firefox), xpdf, Evince, mupdf-gl, the viewer
> is able to find "dealing", altough it cannot be displayed.
> 
> Okular and Sumatra (with Wine in Linux) are not able to find "dealing".
> 
> Is there any way to have a hard clipping in ConTeXt?
> 
> I mean, that only the contents of the clipped section is added to the
> resulting PDF document?

one has to render a document (page stream) in order to wee what end up 
where .. a viewer has that info so it can decide to act upon it (apart 
from some gambling with words clipped in the middle of a character)

this is not something for context to provide (it would mean keeping 
track of what gets clipped, and then compensating for it because it can 
still contribute to placement of following stuff, and then how about 
half clipped stuff)

if i had a lifespan of 1000 years or were on a boring trip to another 
planet it might make a nice (although pointless) challenge to keep me 
occupied

Hans

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___________________________________________________________________________________

[NTG-context] Re: hard clipping in ConTeXt?

[Pablo Rodriguez via ntg-context]

On 11/11/23 11:02, Hans Hagen via ntg-context wrote:
> On 11/10/2023 6:17 PM, Pablo Rodriguez via ntg-context wrote:
>> [...]
>> Is there any way to have a hard clipping in ConTeXt?
>>
>> I mean, that only the contents of the clipped section is added to the
>> resulting PDF document?
>
> one has to render a document (page stream) in order to wee what end up
> where .. a viewer has that info so it can decide to act upon it (apart
> from some gambling with words clipped in the middle of a character)
>
> this is not something for context to provide (it would mean keeping
> track of what gets clipped, and then compensating for it because it can
> still contribute to placement of following stuff, and then how about
> half clipped stuff)

Many thanks for your reply, Hans.

Now it is clear to me that what I asked is too complex to be achieved
with ConTeXt (since it is mainly outside its scope).

> if i had a lifespan of 1000 years or were on a boring trip to another
> planet it might make a nice (although pointless) challenge to keep me
> occupied

From the user perspective, it is important to know that the full page is
included in the document (which may lead to unintended consequences).

I have accidentally discovered this myself the other day and I’m going
to check the wiki to add this information (if not included).

Many thanks for your help,

Pablo

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maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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