Re: Let chapter start on odd page and make the even page before show an image

["Jan U. Hasecke" <juh+ntg-context@mailbox.org>]

Am 29.05.20 um 12:45 schrieb Wolfgang Schuster:
> juh schrieb am 29.05.2020 um 10:29:
>> Dear all,
>>
>> with your help I can colorize the empty even page right before a
>> chapter starts
>> on the odd page. The mwe below shows it.
>>
>> Now I would like to redefine the contents of the left page on the fly
>> in the text
>> so that I could place images on this page.
>>
>> I thought that I could get a simple solution by inserting a TEXpage as
>> even
>> page, but this does not work for several reasons. First a TEXpage is
>> not counted
>> correctly like a normal page.  And secondly I found now way to put it
>> on the
>> even page.
>>
>> So what I really want to achieve is a way to redefine this setups at
>> some point
>> in the text to insert eg. a picture on the even page before a chapter.
>>
>> \startsetups [chapter:before]
>>    \doifoddpageelse
>>      {}
>>      {\pushbackground[page]
>>       \setupbackgrounds[page][background=color,backgroundcolor=blue,]
>>       \page[empty,right]
>>       \popbackground}
>> \stopsetups
>>
>> As you see the image is not in the right place and of course the
>> pagenumbering
>> is wrong.
> Use \startTEXpage[pagestate=start] to increase the page number with TEX
> pages.

Thanks for this hint.

>> I want that one of these blue pages shows an image. Is this possible?
> Yes but there are different ways for different requirements.
> 
> - Do you you have a picture before *every* chapter?

No, the additional image page shall appear only if the last chapter ends
on an odd page. Then I need the image page to push the new chapter to
the next odd page.

> - Do you use full page images?
> - Are the images cropped to fit the page dimension, stretched or
> centered with margins?

For this usecase images are blown up and cropped to fit the page
dimension including the bleed.


juh
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