[PATCH, pixman] Eliminate fast path flags

[Soeren Sandmann]

Hi,

The branch here:

    http://cgit.freedesktop.org/~sandmann/pixman/log/?h=eliminate-flags

eliminates the three fast path flags NEED_SOLID_MASK,
NEED_COMPONENT_ALPHA, and NEED_PIXBUF. The first one was only really
useful for preventing the solid mask paths from running when the mask
had component alpha enabled; the other two could be replaced by new
fake formats PIXMAN_{ax}8r8g8b8_ca and PIXMAN_[r]pixbuf, similar to
the existing fake formats PIXMAN_null and PIXMAN_solid.

Reviews appreciated. I'd also appreciate if people can test that it
still compiles and works on ARM as I had to make some changes blindly
there.

This the second part of merging the flags branch (the first being the
'direct-destination' patch I sent earlier today).


Thanks,
Soren