change color changes path operator too

[MiBa]

Hello everybody,

when I tested the color replacement with different pdf files. I found a weird problem. I one pdf I wanted to replace yellow by green but the color of the background changes too (see picture).

before


after


I investigated the pdf source code and found out that a "stroke path" (Path Painting Operator 'S') is replaced by "fill then stroke path" (Path Painting Operator 'B').

Is this a bug in the SDK or is something wrong in my code?
I attached a sample project (VS2013/C#) if somebody want to reproduce this behaviour.

Thanks for your comments

[Sasha - PDF-XChange]

Hello MiBa,

This piece of code is wrong

Code: Select all

cState.FillColor[ColorType.ColorType_CMYK].GetCMYK(out c, out m, out y, out k);

You've done the same mistake again, as I previously described here:
https://forum.pdf-xchange.com/ ... 66&t=25276

HTH,
Alex

[MiBa]

Hi Alex,

your right. Now I get the cmyk values by "GetComponents()" but this doesn't fix my Problem. After the color conversion one path operator has changed.

Thanks for your support
Michael

[Sasha - PDF-XChange]

Hello MiBa,

Can you post the updated code part so that i can check that?

Cheers,
Alex

[MiBa]

Hi Alex,

attached is my sample project (VS2013 / C#). It shows a simple menu. With "Load" you can load the sample pdf and with "Change color" the yellow parts should be changed to green. unfortunately the white background becomes green too.

Thank you for your support

Michael

[Sasha - PDF-XChange]

Hello MiBa,

I've updated your ChangeColorOnPage method:
https://gist.github.com/Polaringu/20070f9d7ecb3810d5d6

HTH,
Alex