gfx/cairo/ignore-rank0.patch

   1 diff --git a/gfx/cairo/cairo/src/cairo-gstate.c b/gfx/cairo/cairo/src/cairo-gstate.c
   2 index 0439bcf..32a5c4b 100644
   3 --- a/gfx/cairo/cairo/src/cairo-gstate.c
   4 +++ b/gfx/cairo/cairo/src/cairo-gstate.c
   5 @@ -1271,8 +1271,13 @@ _cairo_gstate_set_font_matrix (cairo_gstate_t        *gstate,
   6      if (memcmp (matrix, &gstate->font_matrix, sizeof (cairo_matrix_t)) == 0)
   7         return CAIRO_STATUS_SUCCESS;
   8
   9 -    if (! _cairo_matrix_is_invertible (matrix))
  10 -       return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);
  11 +    if (! _cairo_matrix_is_invertible (matrix)) {
  12 +       /* rank 0 matrices are ok even though they are not invertible */
  13 +       if (!(matrix->xx == 0. && matrix->xy == 0. &&
  14 +             matrix->yx == 0. && matrix->yy == 0.)) {
  15 +           return _cairo_error (CAIRO_STATUS_INVALID_MATRIX);
  16 +       }
  17 +    }
  18
  19      _cairo_gstate_unset_scaled_font (gstate);
  20