[reportlab-users] Reportlab and colors in Adobe Reader

Miha Tomšič miha.tomsic at gmail.com
Thu Aug 12 05:37:58 EDT 2010

Hello, Robin!

On Wed, Aug 11, 2010 at 4:58 PM, Robin Becker <robin at reportlab.com> wrote:

> So far as I know we convert png into RGB, but we don't have a concept for

> the standard/default colour space.


> As I read the 1.7 manual I think we need to put these exceptional things

> into a transparency group XObject (which is like an ordinary Group XObject,

> but with extra parameters) and set some special parameters on the group.


> So far as I know we can't do that at the moment; firstly we don't yet have

> group XObjects, secondly I don't think we understand exactly how they are

> used.


> It may be these are just forms with an additional entry in the dictionary,

> but I'm not sure.


Huh, that's way beyond me :) Interesting though.

> We do support cmyk for JPEGs, could that be a possible solution?


I'll try to remove transparecy from offending PNGs or use some other image
format (like JPEG).

Thanks and take care,
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