[cairo] Runtime check for AlphaBlend (win32 backend)

[Tim Rowley]

On 5/17/05, Tor Lillqvist <tml at iki.fi> wrote:
> But Cairo uses other NT-only API, too: CreateFontIndirectW(),
> GetGlyphOutlineW(), ModifyWorldTransform(), SetWorldTransform(), and
> SetGraphicsMode(GM_ADVANCED), at least, so that AlphaBlend() change
> won't make it run on Win98, as far as I can see. Is this just by
> accident, or an deliberate design choice?

Ah, that might explain why I didn't have those functions on PocketPC
and had to disable the font backend.

>  If it is by choice, does
> this mean HEAD GTK+ and GLib can forget about Win9x, too? (I sure
> would hope so...)

>From a mozilla point of view, I hope the unconditional use of NT-only
APIs is not intentional.  As you may have read, there are plans to
make all of mozilla gfx go through cairo, but we can't abandon win98
users.