Transforms the distance vector (@dx,@dy) by @matrix. This is
similar to pango_matrix_transform_point() except that the translation
components of the transformation are ignored. The calculation of
the returned vector is as follows:
Affine transformations are position invariant, so the same vector
always transforms to the same vector. If (@x1,@y1) transforms
to (@x2,@y2) then (@x1+@dx1,@y1+@dy1) will transform to
(@x1+@dx2,@y1+@dy2) for all values of @x1 and @x2.
Transforms the distance vector (@dx,@dy) by @matrix. This is similar to pango_matrix_transform_point() except that the translation components of the transformation are ignored. The calculation of the returned vector is as follows:
<programlisting> dx2 = dx1 * xx + dy1 * xy; dy2 = dx1 * yx + dy1 * yy; </programlisting>
Affine transformations are position invariant, so the same vector always transforms to the same vector. If (@x1,@y1) transforms to (@x2,@y2) then (@x1+@dx1,@y1+@dy1) will transform to (@x1+@dx2,@y1+@dy2) for all values of @x1 and @x2.