On Sat, May 2, 2009 at 8:57 PM, Joel Holdsworth <[email protected]> wrote: > On Sat, 2009-05-02 at 20:38 +0200, Roderick Colenbrander wrote: >> On Sat, May 2, 2009 at 6:55 PM, Joel Holdsworth >> <[email protected]> wrote: >> > Hi All, >> > >> > I've hit a bit of a wall with alpha blended icons. CreateIcon is working >> > fine for icon creation, but ExtractIcon and LoadIconFromResource etc. >> > are all proving more of a problem. All of these use various GDI DIB >> > functions to coerce the icon bitmap to the correct colour depth and >> > size. The problem is that preserving the alpha channel through these DIB >> > functions seems to be impossible because they go via X11, so until the >> > dib engine is merged (after hell freezes over) I'm not sure I can go >> > much further. >> > >> > Joel >> > >> > >> > >> > >> > >> >> If you say X11 might be problematic note that more and more display >> drivers are offering visuals with alpha, so 32-bit ones instead of >> 24-bit. You could force the selection of such a visual in winex11.drv >> for testing. >> >> Roderick > > Is that right? I simply assumed it would screw it up. If the problem can > be solved with fixes to user32 or gdi32, then I can probably find the > solution. If it involves work on winex11, then I'm not really the right > guy for the job. > > >
Why again did you need this specific alphablend method? The icon can't be converted to use some basic color keying for transparency or so?
