znakeeye Posted May 22, 2010 Share Posted May 22, 2010 Windows 7 x64. Probably have all .NET versions by now (including .NET 4.0). Not sure exactly which version started doing this, but now I tried both 3.5.4 and 3.5.5. Both versions destroy the transparency, filling in white where it should be transparent. Please fix this as soon as possible. I'll look through my archives and see if I can get it to save PNG files properly using an older version. Steps to reproduce: 1) Fill an image with black and delete a portion (e.g. making it transparent). 2) Save it as PNG 24-bit. The image still looks good. 3) Now close the image and reopen it. The transparent part is white. Quote Link to comment Share on other sites More sharing options...
csm725 Posted May 22, 2010 Share Posted May 22, 2010 Here is my 32-bit 'Save Dialog' preview: http://img42.imageshack.us/img42/4411/repro32bitpreview.png ...and a 24-bit: http://img85.imageshack.us/img85/7160/repro24bitpreview.png Maybe 24-bit doesn't preserve transparency? Quote My deviantART | Sig Battles | My Tutorials | csm725.com Click to enter or vote in the official Paint.NET competitions! COMPETITIONS: LOGO OF THE WEEK Link to comment Share on other sites More sharing options...
pyrochild Posted May 22, 2010 Share Posted May 22, 2010 24-bit does not support transparency. You can see this in the Save Configuration Dialog. If you don't specifically need to specify bittedness when saving as PNG, you should always choose Auto-detect, which will determine the best format based on your image. If you do need to specify bittedness, you should make the effort to understand what it means before claiming limitations of certain formats as a bug. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
Rick Brewster Posted May 22, 2010 Share Posted May 22, 2010 Maybe 24-bit doesn't preserve transparency? "Maybe" ? 32-bit includes 8-bits each for red, green, blue, and alpha. Guess which 8-bits are dropped with 24-bit mode. You get 1 guess. I'm going to change the title of this thread to be less uninformed. Sheesh. Quote The Paint.NET Blog: https://blog.getpaint.net/ Donations are always appreciated! https://www.getpaint.net/donate.html Link to comment Share on other sites More sharing options...
csm725 Posted May 22, 2010 Share Posted May 22, 2010 I dunno Rick, I'm not an image program expert... Quote My deviantART | Sig Battles | My Tutorials | csm725.com Click to enter or vote in the official Paint.NET competitions! COMPETITIONS: LOGO OF THE WEEK Link to comment Share on other sites More sharing options...
pyrochild Posted May 23, 2010 Share Posted May 23, 2010 No biting, Rick. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
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