Previous | Next | (P-PDF) What's Wrong with my PDF?

Topic: transparency (alpha) in pdf
Conf: (P-PDF) What's Wrong with my PDF?, Msg: 142135
From: lcantelmo
Date: 11/3/2005 12:45 AM

I'm having a problem trying to apply transparency (alpha) in a pdf document.

My Resources dictionary looks like this:

/Resources <<
...
...

/ExtGState <<
/alpha-fill-50 << /ca 0.5 >>
>>

...
...
>>


And in the page contents stream I'm using:

1 0 0 rg /alpha-fill-50 gs
50 50 100 100 re F



Using Acrobat Reader 7 on Windows, the colors appear "darkened", but using Acrobat Reader 7 on Linux it looks fine.
Even if I define /alpha-fill-50 without using it, it looks the same.
I'd like to know if I'm doing something wrong, or what would be the way to use transparency in fills and strokes.

Thanks in advance.