[Pixman] About 2.5D effect

[Søren Sandmann]

唐博 <hitiger.2008 at yahoo.com.cn> writes:

> How can pixman achieve 2.5D effect, it's affine matirx is 3*3. If add
> Z axis coordinate, I found that it should apply 4*4 matrix.

You may be interested in this branch:

    http://cgit.freedesktop.org/~sandmann/pixman/log/?h=checkerboard

which contains two demo programs, one that can compute a projective
transformation that transforms one quadrilateral into another, and one
that displays a checkerboard under a projective transformation.

Note that the support for projective matrices in pixman has not been
used all that much until now, so it isn't very optimized.


Soren