[Cairo] renaming cairo_concat_matrix

[Carl Worth]

On Sep 17, Bill Spitzak wrote:
 > This is a discussion of how to rename cairo_concat_matrix to use only full 
 > words in all call names.
 > 
 > How about "transform", ie cairo_transform(cairo_t, matrix). Note: no "matrix" 
 > in the name.

In isolation this seems a fine name. But, there are several other
functions that already have matrix in the name:

	cairo_set_matrix (cairo_t *cr, cairo_matrix_t *matrix);

	cairo_default_matrix (cairo_t *cr);

	/* XXX: There's been a proposal to add cairo_default_matrix_exact */

	cairo_identity_matrix (cairo_t *cr);

Any proposal should consider these as well.

Of these, the trickiest aspect is differentiating the current
cairo_set_matrix (which installs a new transformation) and the current
cairo_concat_matrix (which modifies the current transformation
according to the given matrix).

-Carl