On 6-Aug-09, at 9:57 AM, John Tamplin wrote: > If the transparency is just binary, then IE6 already supports PNG > transparency, right? Aside from the hassle of detecting if a one- > bit alpha channel will do, I think the J2D libraries we currently > use won't generate one-bit alpha channels (I could be remembering > incorrectly however), so we would have to find something else.
John, That's correct: IE6 supports PNG with 1-bit alpha transparency. More specifically, IE6 supports PNG files with a palette and a 100% transparent color at index 0. Java doesn't generate PNG files with this property. We have a specific build step in our environment that post-processes all the PNG files to force this. Conditional comments serve IE6 the same CSS file, but from a subdirectory that contains the IE6-processed images instead. We end up with a lot of dithering on some of our output images, but it still works on IE6. Matt. --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/Google-Web-Toolkit-Contributors -~----------~----~----~----~------~----~------~--~---
