Hi, I am working ImageListStreamer. Win32 image lists support 32-bit bitmaps and comctl32.dll version 6.0 has 32-bit ARGB alpha channel support.
MS GDI+ can load 32-bit bitmaps, it loads the if they were 32-bit RGB, uses no alpha channel, but alpha channel is preserved in memory. This means that nither GetPixel nor Graphics use alpha channel but alpha channel can be obtained using LockBits. libgdiplus seems to use Format32bppArgb instead of Format32bppRgb for 32-bit BMPs that is bug: http://bugzilla.ximian.com/show_bug.cgi?id=76562 Is it safe to assume that libgdiplus will preserve alpha channel for LockBits even if it will use Format32bppRgb for 32-bit BMPs? Kornél _______________________________________________ Mono-winforms-list maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-winforms-list
