Implement cairo_scaled_font_get_type

src/cairo-atsui-font.c

@@ -664,6 +664,7 @@ _cairo_atsui_font_old_show_glyphs (void		       *abstract_font,
 }
 
 const cairo_scaled_font_backend_t cairo_atsui_scaled_font_backend = {
+    CAIRO_FONT_TYPE_ATSUI,
     _cairo_atsui_font_create_toy,
     _cairo_atsui_font_fini,
     _cairo_atsui_font_scaled_glyph_init,

src/cairo-ft-font.c

@@ -1901,6 +1901,7 @@ _cairo_ft_show_glyphs (void		       *abstract_font,
 }
 
 const cairo_scaled_font_backend_t cairo_ft_scaled_font_backend = {
+    CAIRO_FONT_TYPE_FT,
     _cairo_ft_scaled_font_create_toy,
     _cairo_ft_scaled_font_fini,
     _cairo_ft_scaled_glyph_init,

src/cairo-scaled-font.c

@@ -118,6 +118,12 @@ _cairo_scaled_font_set_error (cairo_scaled_font_t *scaled_font,
     _cairo_error (status);
 }
 
+cairo_font_type_t
+cairo_scaled_font_get_type (cairo_scaled_font_t *scaled_font)
+{
+    return scaled_font->backend->type;
+}
+
 /**
  * cairo_scaled_font_status:
  * @scaled_font: a #cairo_scaled_font_t

src/cairo-win32-font.c

@@ -1355,6 +1355,7 @@ CLEANUP_FONT:
 }
 
 const cairo_scaled_font_backend_t cairo_win32_scaled_font_backend = {
+    CAIRO_FONT_TYPE_WIN32,
     _cairo_win32_scaled_font_create_toy,
     _cairo_win32_scaled_font_fini,
     _cairo_win32_scaled_font_glyph_init,

src/cairoint.h

@@ -509,6 +509,8 @@ typedef enum _cairo_scaled_glyph_info {
 } cairo_scaled_glyph_info_t;
 
 struct _cairo_scaled_font_backend {
+    cairo_font_type_t type;
+
     cairo_status_t
     (*create_toy)  (cairo_toy_font_face_t	*toy_face,
 		    const cairo_matrix_t	*font_matrix,