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Hidden / visible objects. How to determine.

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alin_edric

Post subject: Hidden / visible objects. How to determine.

Posted: Mon Oct 06, 2008 11:12 am

Joined: Mon Oct 06, 2008 10:24 am
Posts: 3

Hi,

I need to determine wich object are visible in a pdf page. for example I can have 2 images in the same location. how can i know wich one is visible ? and which one is hidden?

thank you.

alin iacob

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Thomas Hoevel

Post subject:

Posted: Mon Oct 06, 2008 1:17 pm

PDFsharp Guru

Joined: Mon Oct 16, 2006 8:16 am
Posts: 3097
Location: Cologne, Germany

Hi!

I don't know.
But since every pixel can have it's own opacity it's even possible that both images are visible - even at the same place.
So with transparency this is really difficult.

Without transparency, you should be able to solve this by comparing the rectangles of the pictures.

_________________
Regards
Thomas Hoevel
PDFsharp Team

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