Text is fainter when it has watermark behind it

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David_Carle
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Text is fainter when it has watermark behind it

Post by David_Carle » Wed Apr 25, 2012 3:19 pm

I've noticed that the text in a document that is 'on top of' a watermark appears lighter/fainter than neighbouring text in the same font which is not on the watermark.

The watermark is added using this Delphi code:

Code: Select all

AddImageWatermark('Header',lsHeaderFile,-1,liWidth,liHeight,9,0,60,0,255,29,0,'');
Is this the intended behaviour, or is there a setting that I can change to affect this?


Secondly, according to PDFX4DRV_API.pdf, page 49, for dwOpacity "Value must be in the range of 0 (fully transparent) to 100 (fully opaque)."

However, the code above and some examples on this forum seem to support a range of 0 to 255

Is this just another mistake in the documentation?

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Tracker Supp-Stefan
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Re: Text is fainter when it has watermark behind it

Post by Tracker Supp-Stefan » Wed Apr 25, 2012 3:51 pm

Hello David,

Could you please provide a sample file, and also do test with a value of 255 - and if it is an error in the documentation - I will see this fixed asap.

Best,
Stefan

David_Carle
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Re: Text is fainter when it has watermark behind it

Post by David_Carle » Thu Apr 26, 2012 2:36 pm

Hi Stefan

I have emailed the jpg to support@tracker-software.com

We encounter the same issue with each file we've tried.

With regard to your comment about testing with a value of 255, this is the value that is currently in use, as per the code line included earlier.

David

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Re: Text is fainter when it has watermark behind it

Post by Tracker Supp-Stefan » Thu Apr 26, 2012 4:38 pm

Hi David,

Thanks for the sample image, but could we please also get a sample of a PDF file showing the problem.

Thanks,
Stefan

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