Add +hb_font_get_glyph_advances_for_direction

New API:
+hb_font_get_glyph_advances_for_direction

docs/harfbuzz-sections.txt

@@ -225,6 +225,7 @@ hb_font_get_face
 hb_font_get_glyph
 hb_font_get_glyph_advance_for_direction
 hb_font_get_glyph_advance_func_t
+hb_font_get_glyph_advances_for_direction
 hb_font_get_glyph_contour_point
 hb_font_get_glyph_contour_point_for_origin
 hb_font_get_glyph_contour_point_func_t

src/hb-font-private.hh

@@ -376,6 +376,18 @@ struct hb_font_t
     else
       *y = get_glyph_v_advance (glyph);
   }
+  inline void get_glyph_advances_for_direction (hb_direction_t direction,
+						unsigned count,
+						hb_codepoint_t *first_glyph,
+						unsigned glyph_stride,
+						hb_position_t *first_advance,
+						unsigned advance_stride)
+  {
+    if (likely (HB_DIRECTION_IS_HORIZONTAL (direction)))
+      get_glyph_h_advances (count, first_glyph, glyph_stride, first_advance, advance_stride);
+    else
+      get_glyph_v_advances (count, first_glyph, glyph_stride, first_advance, advance_stride);
+  }
 
   inline void guess_v_origin_minus_h_origin (hb_codepoint_t glyph,
 					     hb_position_t *x, hb_position_t *y)

src/hb-font.cc

@@ -1024,6 +1024,26 @@ hb_font_get_glyph_advance_for_direction (hb_font_t *font,
 {
   return font->get_glyph_advance_for_direction (glyph, direction, x, y);
 }
+/**
+ * hb_font_get_glyph_advances_for_direction:
+ * @font: a font.
+ * @direction: 
+ *
+ * 
+ *
+ * Since: REPLACEME
+ **/
+HB_EXTERN void
+hb_font_get_glyph_advances_for_direction (hb_font_t* font,
+					  hb_direction_t direction,
+					  unsigned count,
+					  hb_codepoint_t *first_glyph,
+					  unsigned glyph_stride,
+					  hb_position_t *first_advance,
+					  unsigned advance_stride)
+{
+  font->get_glyph_advances_for_direction (direction, count, first_glyph, glyph_stride, first_advance, advance_stride);
+}
 
 /**
  * hb_font_get_glyph_origin_for_direction:

src/hb-font.h

@@ -529,6 +529,14 @@ hb_font_get_glyph_advance_for_direction (hb_font_t *font,
 					 hb_direction_t direction,
 					 hb_position_t *x, hb_position_t *y);
 HB_EXTERN void
+hb_font_get_glyph_advances_for_direction (hb_font_t* font,
+					  hb_direction_t direction,
+					  unsigned count,
+					  hb_codepoint_t *first_glyph,
+					  unsigned glyph_stride,
+					  hb_position_t *first_advance,
+					  unsigned advance_stride);
+HB_EXTERN void
 hb_font_get_glyph_origin_for_direction (hb_font_t *font,
 					hb_codepoint_t glyph,
 					hb_direction_t direction,