<html> <head> <base href="https://bugs.documentfoundation.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Transparent objects either possess outlines when none are defined or are completely opaque, depending on export PNG options" href="https://bugs.documentfoundation.org/show_bug.cgi?id=135910#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Transparent objects either possess outlines when none are defined or are completely opaque, depending on export PNG options" href="https://bugs.documentfoundation.org/show_bug.cgi?id=135910">bug 135910</a> from <a class="email" href="mailto:mwtjunkmail@gmail.com" title="mwtjunkmail@gmail.com">mwtjunkmail@gmail.com</a> <pre>(In reply to Mike Kaganski from <a href="show_bug.cgi?id=135910#c9">comment #9</a>) > The problem is that now, when the painting of objects happens on a clear > transparent vdev, painting the object (e.g. rectangle in case of attachment > 164477 [details]), happening in two stages (RGB separately, alpha > separately), only sees white background while drawing RGB. AA makes the > painting to blend with the background on edges, which results in the borders > of the shape to become light (and semi-transparent, but the unintended > *color* change happens anyway). > > I suppose that it should instead somehow see that the pixels it blends with > are completely transparent, and then do not change color, and only apply AA > to transparency. But I don't yet have an idea how to perform that in out > weird separated (RGB / Alpha) graphics. > > Thorsten, quikee, Lubos: possibly you have some ideas? Exports using the TIFF format (both whole slide and as a selection) do not exhibit any of the problems this or my previous bug listed (but I need PNG files). Perhaps model the PNG export after however TIFF handles it?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>