Re: Alpha blending

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From: YYZ (none_at_none.com)
Date: 02/17/05 

Date: Thu, 17 Feb 2005 08:48:11 -0600

>> That's not exactly what I was going for. I was looking for true
>> alphablending, so that the diagonal lines would appear dark red since its
>> blended red with black (of the pattern). But as always, I learn so much
>> from your examples.
>
> I would strongly suggest that you have a play with the various binary
> raster operations before disregarding it though,
> they will give you a huge performance increase over full alpha blending
> since they are performed at a lower level and
> are a far simpler calculation. If you're working with 'simple' colours
> then it makes a lot of sense to use them IMO,
> you may not get exactly the effect you're after but with a little tweaking
> you're more than likely to end up with
> something pretty close and more to the point, fast!

I see what you mean. I honestly didn't know that GDI+ was built on top of
GDI -- I figured it might be like DirectX, which is an alternative to GDI (I
think I'm saying that right), and I really thought that GDI+ would be faster
than GDI.

Now that we know its not, I may have to rethink this process AGAIN!

I also have to take into account the likelihood of getting help when stuck
on certain problems, and you use a lot of GDI but don't have a lot of GDI+
examples. That's not something to disregard lightly.

Thanks as always for everything.

Matt

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