Move common HarfBuzz code to a common file hbfont.c

* src/hbfont.c: New file, with code moved from w32uniscribe.c
and renamed/modified as appropriate.
* src/w32uniscribe.c: Move to hbfont.c DEF_DLL_FN and macro
definitions for HarfBuzz functions used in hbfont.c
(load_harfbuzz_funcs): Move loading of HarfBuzz functions used
by hbfont.c to hbfont.c:hbfont_init_w32_funcs, and call that
function from here.
(syms_of_w32uniscribe_for_pdumper): Fill the 'shape' and
'combining_capability' members with hbfont.c function names.
* src/w32common.h (hbfont_init_w32_funcs) [HAVE_HARFBUZZ]: Add
prototype.
* src/font.h (hbfont_shape, hbfont_combining_capability)
[HAVE_HARFBUZZ]: Add prototypes.
* src/Makefile.in (SOME_MACHINE_OBJECTS): Add hbfont.o.

* configure.ac (FONT_OBJ): Add hbfont.o if HAVE_HARFBUZZ.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/font.h b/src/font.h
index 4d1341a0db8..99b95836d7a 100644
--- a/src/font.h
+++ b/src/font.h
@@ -890,6 +890,11 @@ extern void font_fill_lglyph_metrics (Lisp_Object, Lisp_Object);
 extern Lisp_Object font_put_extra (Lisp_Object font, Lisp_Object prop,
                                    Lisp_Object val);
 
+#ifdef HAVE_HARFBUZZ
+extern Lisp_Object hbfont_shape (Lisp_Object, Lisp_Object);
+extern Lisp_Object hbfont_combining_capability (struct font *);
+#endif
+
 #if defined (HAVE_XFT) || defined (HAVE_FREETYPE)
 extern void font_put_frame_data (struct frame *, Lisp_Object, void *);
 extern void *font_get_frame_data (struct frame *f, Lisp_Object);