Giving up for now

[Roderick Colenbrander]

On Sat, May 2, 2009 at 8:57 PM, Joel Holdsworth
<joel at airwebreathe.org.uk> wrote:
> On Sat, 2009-05-02 at 20:38 +0200, Roderick Colenbrander wrote:
>> On Sat, May 2, 2009 at 6:55 PM, Joel Holdsworth
>> <joel at airwebreathe.org.uk> 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?