Replace XChar2b with unsigned in all font backends

The xfont backend using XChar2b in its API doesn't mean that we should
use it everywhere else.

* src/dispextern.h (glyph_string):
* src/ftcrfont.c (ftcrfont_draw):
* src/ftxfont.c (ftxfont_draw):
* src/w32term.c (w32_draw_glyphless_glyph_string_foreground):
* src/xdisp.c (init_glyph_string, get_char_face_and_encoding)
(get_glyph_face_and_encoding, get_char_glyph_code)
(fill_gstring_glyph_string, fill_stretch_glyph_string)
(normal_char_ascent_descent, gui_get_glyph_overhangs)
(compute_overhangs_and_x, gui_produce_glyphs):
* src/xfont.c (xfont_get_pcm, xfont_chars_supported, xfont_open)
(xfont_encode_char, xfont_text_extents, xfont_draw)
* src/xftfont.c (xftfont_draw):
* src/xterm.c (x_compute_glyph_string_overhangs)
(x_draw_glyphless_glyph_string_foreground): Use unsigned over XChar2b.

* src/nsgui.h:
* src/w32gui.h:
* src/xterm.h: Remove XChar2b, STORE_XCHAR2B, XCHAR2B_BYTE1, and
XCHAR2B_BYTE2 typedefs and macros.

* src/font.h (font_driver):
(ftfont_text_extents)
* src/ftcrfont.c (ftcrfont_text_extents):
* src/ftfont.c (ftfont_text_extents):
* src/macfont.m (macfont_text_extents):
* src/nsfont.m (nsfont_text_extents):
* src/w32font.h (w32_font_text_extents):
* src/font.c (xfont_text_extents):
* src/xftfont.c (xftfont_text_extents): Make code parameter const.

1 files changed, 5 insertions, 6 deletions

diff --git a/src/ftcrfont.c b/src/ftcrfont.c
index e7c73eac4d3..606db0b949b 100644
--- a/src/ftcrfont.c
+++ b/src/ftcrfont.c
@@ -242,7 +242,7 @@ ftcrfont_close (struct font *font)
 
 static void
 ftcrfont_text_extents (struct font *font,
-                       unsigned *code,
+                       const unsigned *code,
                        int nglyphs,
                        struct font_metrics *metrics)
 {
@@ -341,13 +341,12 @@ ftcrfont_draw (struct glyph_string *s,
   glyphs = alloca (sizeof (cairo_glyph_t) * len);
   for (i = 0; i < len; i++)
     {
-      unsigned code = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
-		       | XCHAR2B_BYTE2 (s->char2b + from + i));
-
-      glyphs[i].index = code;
+      glyphs[i].index = s->char2b[from + i];
       glyphs[i].x = x;
       glyphs[i].y = y;
-      x += (s->padding_p ? 1 : ftcrfont_glyph_extents (s->font, code, NULL));
+      x += (s->padding_p ? 1 : ftcrfont_glyph_extents (s->font,
+                                                       glyphs[i].index,
+                                                       NULL));
     }
 
   x_set_cr_source_with_gc_foreground (f, s->gc);