[config] Better compile away morx/kerx/trak

Part of https://github.com/harfbuzz/harfbuzz/issues/1652

src/hb-ot-shape.cc

@@ -55,13 +55,9 @@ hb_ot_shape_collect_features (hb_ot_shape_planner_t          *planner,
 			      const hb_feature_t             *user_features,
 			      unsigned int                    num_user_features);
 
-static bool
+static inline bool
 _hb_apply_morx (hb_face_t *face)
 {
-#ifdef HB_NO_SHAPE_AAT
-  return false;
-#endif
-
   if (hb_options ().aat &&
       hb_aat_layout_has_substitution (face))
     return true;
@@ -79,18 +75,18 @@ hb_ot_shape_planner_t::hb_ot_shape_planner_t (hb_face_t                     *fac
 						face (face),
 						props (*props),
 						map (face, props),
-						aat_map (face, props),
-						apply_morx (_hb_apply_morx (face))
+						aat_map (face, props)
+#ifndef HB_NO_SHAPE_AAT
+						, apply_morx (_hb_apply_morx (face))
+#endif
 {
   shaper = hb_ot_shape_complex_categorize (this);
 
   script_zero_marks = shaper->zero_width_marks != HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE;
   script_fallback_mark_positioning = shaper->fallback_position;
 
-#ifndef HB_NO_SHAPE_AAT
   if (apply_morx)
     shaper = &_hb_ot_complex_shaper_default;
-#endif
 }
 
 void
@@ -100,10 +96,8 @@ hb_ot_shape_planner_t::compile (hb_ot_shape_plan_t           &plan,
   plan.props = props;
   plan.shaper = shaper;
   map.compile (plan.map, key);
-#ifndef HB_NO_SHAPE_AAT
   if (apply_morx)
     aat_map.compile (plan.aat_map);
-#endif
 
   plan.frac_mask = plan.map.get_1_mask (HB_TAG ('f','r','a','c'));
   plan.numr_mask = plan.map.get_1_mask (HB_TAG ('n','u','m','r'));
@@ -132,7 +126,9 @@ hb_ot_shape_planner_t::compile (hb_ot_shape_plan_t           &plan,
    * Decide who does substitutions. GSUB, morx, or fallback.
    */
 
+#ifndef HB_NO_SHAPE_AAT
   plan.apply_morx = apply_morx;
+#endif
 
   /*
    * Decide who does positioning. GPOS, kerx, kern, or fallback.
@@ -154,8 +150,12 @@ hb_ot_shape_planner_t::compile (hb_ot_shape_plan_t           &plan,
   if (!plan.apply_kerx && !has_gpos_kern)
   {
     /* Apparently Apple applies kerx if GPOS kern was not applied. */
-    if (hb_aat_layout_has_positioning (face))
+    if (0)
+      ;
+#ifndef HB_NO_SHAPE_AAT
+    else if (hb_aat_layout_has_positioning (face))
       plan.apply_kerx = true;
+#endif
     else if (hb_ot_layout_has_kerning (face))
       plan.apply_kern = true;
   }
@@ -172,8 +172,10 @@ hb_ot_shape_planner_t::compile (hb_ot_shape_plan_t           &plan,
   plan.fallback_mark_positioning = plan.adjust_mark_positioning_when_zeroing &&
 				   script_fallback_mark_positioning;
 
+#ifndef HB_NO_SHAPE_AAT
   /* Currently we always apply trak. */
   plan.apply_trak = plan.requested_tracking && hb_aat_layout_has_tracking (face);
+#endif
 }
 
 bool
@@ -216,11 +218,9 @@ void
 hb_ot_shape_plan_t::substitute (hb_font_t   *font,
 				hb_buffer_t *buffer) const
 {
-#ifndef HB_NO_SHAPE_AAT
   if (unlikely (apply_morx))
     hb_aat_layout_substitute (this, font, buffer);
   else
-#endif
     map.substitute (this, font, buffer);
 }
 
@@ -230,19 +230,15 @@ hb_ot_shape_plan_t::position (hb_font_t   *font,
 {
   if (this->apply_gpos)
     map.position (this, font, buffer);
-#ifndef HB_NO_SHAPE_AAT
   else if (this->apply_kerx)
     hb_aat_layout_position (this, font, buffer);
-#endif
   else if (this->apply_kern)
     hb_ot_layout_kern (this, font, buffer);
   else
     _hb_ot_shape_fallback_kern (this, font, buffer);
 
-#ifndef HB_NO_SHAPE_AAT
   if (this->apply_trak)
     hb_aat_layout_track (this, font, buffer);
-#endif
 }
 
 
@@ -338,7 +334,6 @@ hb_ot_shape_collect_features (hb_ot_shape_planner_t          *planner,
 		      feature->value);
   }
 
-#ifndef HB_NO_SHAPE_AAT
   if (planner->apply_morx)
   {
     hb_aat_map_builder_t *aat_map = &planner->aat_map;
@@ -348,7 +343,6 @@ hb_ot_shape_collect_features (hb_ot_shape_planner_t          *planner,
       aat_map->add_feature (feature->tag, feature->value);
     }
   }
-#endif
 
   if (planner->shaper->override_features)
     planner->shaper->override_features (planner);
@@ -783,10 +777,8 @@ static inline void
 hb_ot_substitute_post (const hb_ot_shape_context_t *c)
 {
   hb_ot_hide_default_ignorables (c->buffer, c->font);
-#ifndef HB_NO_SHAPE_AAT
   if (c->plan->apply_morx)
     hb_aat_layout_remove_deleted_glyphs (c->buffer);
-#endif
 
   if (c->plan->shaper->postprocess_glyphs)
     c->plan->shaper->postprocess_glyphs (c->plan, c->buffer, c->font);
@@ -920,10 +912,8 @@ hb_ot_position_complex (const hb_ot_shape_context_t *c)
   /* Finish off.  Has to follow a certain order. */
   hb_ot_layout_position_finish_advances (c->font, c->buffer);
   hb_ot_zero_width_default_ignorables (c->buffer);
-#ifndef HB_NO_SHAPE_AAT
   if (c->plan->apply_morx)
     hb_aat_layout_zero_width_deleted_glyphs (c->buffer);
-#endif
   hb_ot_layout_position_finish_offsets (c->font, c->buffer);
 
   /* The nil glyph_h_origin() func returns 0, so no need to apply it. */

src/hb-ot-shape.hh

@@ -80,10 +80,16 @@ struct hb_ot_shape_plan_t
   bool adjust_mark_positioning_when_zeroing : 1;
 
   bool apply_gpos : 1;
-  bool apply_kerx : 1;
   bool apply_kern : 1;
+#ifndef HB_NO_SHAPE_AAT
+  bool apply_kerx : 1;
   bool apply_morx : 1;
   bool apply_trak : 1;
+#else
+  static constexpr bool apply_kerx = false;
+  static constexpr bool apply_morx = false;
+  static constexpr bool apply_trak = false;
+#endif
 
   void collect_lookups (hb_tag_t table_tag, hb_set_t *lookups) const
   {
@@ -113,7 +119,11 @@ struct hb_ot_shape_planner_t
   hb_segment_properties_t props;
   hb_ot_map_builder_t map;
   hb_aat_map_builder_t aat_map;
+#ifndef HB_NO_SHAPE_AAT
   bool apply_morx : 1;
+#else
+  static constexpr bool apply_morx = false;
+#endif
   bool script_zero_marks : 1;
   bool script_fallback_mark_positioning : 1;
   const struct hb_ot_complex_shaper_t *shaper;