harfbuzz-ng roll

third_party/harfbuzz-ng/src/hb-font-private.hh

Index: third_party/harfbuzz-ng/src/hb-font-private.hh
diff --git a/third_party/harfbuzz-ng/src/hb-font-private.hh b/third_party/harfbuzz-ng/src/hb-font-private.hh
index 91a43047daeacc972eea51d899f8aaa530f06304..b6dafbf474a5a53328dbbacea2b3dbfdeca7ad22 100644
--- a/third_party/harfbuzz-ng/src/hb-font-private.hh
+++ b/third_party/harfbuzz-ng/src/hb-font-private.hh
@@ -33,6 +33,8 @@
 
 #include "hb-font.h"
 #include "hb-object-private.hh"
+#include "hb-shaper-private.hh"
+#include "hb-shape-plan-private.hh"
 
 
 
@@ -54,7 +56,7 @@
   HB_FONT_FUNC_IMPLEMENT (glyph_from_name) \
   /* ^--- Add new callbacks here */
 
-struct _hb_font_funcs_t {
+struct hb_font_funcs_t {
   hb_object_header_t header;
   ASSERT_POD ();
 
@@ -86,28 +88,64 @@ struct _hb_font_funcs_t {
  * hb_face_t
  */
 
-struct _hb_face_t {
+struct hb_face_t {
   hb_object_header_t header;
   ASSERT_POD ();
 
   hb_bool_t immutable;
 
-  hb_reference_table_func_t  reference_table;
+  hb_reference_table_func_t  reference_table_func;
   void                      *user_data;
   hb_destroy_func_t          destroy;
 
-  struct hb_ot_layout_t *ot_layout;
-
   unsigned int index;
-  unsigned int upem;
+  mutable unsigned int upem;
+
+  struct hb_shaper_data_t shaper_data;
+
+  struct plan_node_t {
+    hb_shape_plan_t *shape_plan;
+    plan_node_t *next;
+  } *shape_plans;
+
+
+  inline hb_blob_t *reference_table (hb_tag_t tag) const
+  {
+    hb_blob_t *blob;
+
+    if (unlikely (!this || !reference_table_func))
+      return hb_blob_get_empty ();
+
+    blob = reference_table_func (/*XXX*/const_cast<hb_face_t *> (this), tag, user_data);
+    if (unlikely (!blob))
+      return hb_blob_get_empty ();
+
+    return blob;
+  }
+
+  inline unsigned int get_upem (void) const
+  {
+    if (unlikely (!upem))
+      load_upem ();
+    return upem;
+  }
+
+  private:
+  HB_INTERNAL void load_upem (void) const;
 };
 
+#define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
+#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, face);
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+#undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
+
 
 /*
  * hb_font_t
  */
 
-struct _hb_font_t {
+struct hb_font_t {
   hb_object_header_t header;
   ASSERT_POD ();
 
@@ -126,6 +164,8 @@ struct _hb_font_t {
   void              *user_data;
   hb_destroy_func_t  destroy;
 
+  struct hb_shaper_data_t shaper_data;
+
 
   /* Convert from font-space to user-space */
   inline hb_position_t em_scale_x (int16_t v) { return em_scale (v, this->x_scale); }
@@ -159,10 +199,262 @@ struct _hb_font_t {
   }
 
 
+  /* Public getters */
+
+  inline hb_bool_t get_glyph (hb_codepoint_t unicode, hb_codepoint_t variation_selector,
+			      hb_codepoint_t *glyph)
+  {
+    *glyph = 0;
+    return klass->get.glyph (this, user_data,
+			     unicode, variation_selector, glyph,
+			     klass->user_data.glyph);
+  }
+
+  inline hb_position_t get_glyph_h_advance (hb_codepoint_t glyph)
+  {
+    return klass->get.glyph_h_advance (this, user_data,
+				       glyph,
+				       klass->user_data.glyph_h_advance);
+  }
+
+  inline hb_position_t get_glyph_v_advance (hb_codepoint_t glyph)
+  {
+    return klass->get.glyph_v_advance (this, user_data,
+				       glyph,
+				       klass->user_data.glyph_v_advance);
+  }
+
+  inline hb_bool_t get_glyph_h_origin (hb_codepoint_t glyph,
+				       hb_position_t *x, hb_position_t *y)
+  {
+    *x = *y = 0;
+    return klass->get.glyph_h_origin (this, user_data,
+				      glyph, x, y,
+				      klass->user_data.glyph_h_origin);
+  }
+
+  inline hb_bool_t get_glyph_v_origin (hb_codepoint_t glyph,
+				       hb_position_t *x, hb_position_t *y)
+  {
+    *x = *y = 0;
+    return klass->get.glyph_v_origin (this, user_data,
+				      glyph, x, y,
+				      klass->user_data.glyph_v_origin);
+  }
+
+  inline hb_position_t get_glyph_h_kerning (hb_codepoint_t left_glyph, hb_codepoint_t right_glyph)
+  {
+    return klass->get.glyph_h_kerning (this, user_data,
+				       left_glyph, right_glyph,
+				       klass->user_data.glyph_h_kerning);
+  }
+
+  inline hb_position_t get_glyph_v_kerning (hb_codepoint_t left_glyph, hb_codepoint_t right_glyph)
+  {
+    return klass->get.glyph_v_kerning (this, user_data,
+				       left_glyph, right_glyph,
+				       klass->user_data.glyph_v_kerning);
+  }
+
+  inline hb_bool_t get_glyph_extents (hb_codepoint_t glyph,
+				      hb_glyph_extents_t *extents)
+  {
+    memset (extents, 0, sizeof (*extents));
+    return klass->get.glyph_extents (this, user_data,
+				     glyph,
+				     extents,
+				     klass->user_data.glyph_extents);
+  }
+
+  inline hb_bool_t get_glyph_contour_point (hb_codepoint_t glyph, unsigned int point_index,
+					    hb_position_t *x, hb_position_t *y)
+  {
+    *x = *y = 0;
+    return klass->get.glyph_contour_point (this, user_data,
+					   glyph, point_index,
+					   x, y,
+					   klass->user_data.glyph_contour_point);
+  }
+
+  inline hb_bool_t get_glyph_name (hb_codepoint_t glyph,
+				   char *name, unsigned int size)
+  {
+    if (size) *name = '\0';
+    return klass->get.glyph_name (this, user_data,
+				  glyph,
+				  name, size,
+				  klass->user_data.glyph_name);
+  }
+
+  inline hb_bool_t get_glyph_from_name (const char *name, int len, /* -1 means nul-terminated */
+					hb_codepoint_t *glyph)
+  {
+    *glyph = 0;
+    if (len == -1) len = strlen (name);
+    return klass->get.glyph_from_name (this, user_data,
+				       name, len,
+				       glyph,
+				       klass->user_data.glyph_from_name);
+  }
+
+
+  /* A bit higher-level, and with fallback */
+
+  inline void get_glyph_advance_for_direction (hb_codepoint_t glyph,
+					       hb_direction_t direction,
+					       hb_position_t *x, hb_position_t *y)
+  {
+    if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) {
+      *x = get_glyph_h_advance (glyph);
+      *y = 0;
+    } else {
+      *x = 0;
+      *y = get_glyph_v_advance (glyph);
+    }
+  }
+
+  /* Internal only */
+  inline void guess_v_origin_minus_h_origin (hb_codepoint_t glyph,
+					     hb_position_t *x, hb_position_t *y)
+  {
+    *x = get_glyph_h_advance (glyph) / 2;
+
+    /* TODO use font_metics.ascent */
+    *y = y_scale;
+  }
+
+  inline void get_glyph_origin_for_direction (hb_codepoint_t glyph,
+					      hb_direction_t direction,
+					      hb_position_t *x, hb_position_t *y)
+  {
+    if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) {
+      hb_bool_t ret = get_glyph_h_origin (glyph, x, y);
+      if (!ret && (ret = get_glyph_v_origin (glyph, x, y))) {
+	hb_position_t dx, dy;
+	guess_v_origin_minus_h_origin (glyph, &dx, &dy);
+	*x -= dx; *y -= dy;
+      }
+    } else {
+      hb_bool_t ret = get_glyph_v_origin (glyph, x, y);
+      if (!ret && (ret = get_glyph_h_origin (glyph, x, y))) {
+	hb_position_t dx, dy;
+	guess_v_origin_minus_h_origin (glyph, &dx, &dy);
+	*x += dx; *y += dy;
+      }
+    }
+  }
+
+  inline void add_glyph_origin_for_direction (hb_codepoint_t glyph,
+					      hb_direction_t direction,
+					      hb_position_t *x, hb_position_t *y)
+  {
+    hb_position_t origin_x, origin_y;
+
+    get_glyph_origin_for_direction (glyph, direction, &origin_x, &origin_y);
+
+    *x += origin_x;
+    *y += origin_y;
+  }
+
+  inline void subtract_glyph_origin_for_direction (hb_codepoint_t glyph,
+						   hb_direction_t direction,
+						   hb_position_t *x, hb_position_t *y)
+  {
+    hb_position_t origin_x, origin_y;
+
+    get_glyph_origin_for_direction (glyph, direction, &origin_x, &origin_y);
+
+    *x -= origin_x;
+    *y -= origin_y;
+  }
+
+  inline void get_glyph_kerning_for_direction (hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
+					       hb_direction_t direction,
+					       hb_position_t *x, hb_position_t *y)
+  {
+    if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) {
+      *x = get_glyph_h_kerning (first_glyph, second_glyph);
+      *y = 0;
+    } else {
+      *x = 0;
+      *y = get_glyph_v_kerning (first_glyph, second_glyph);
+    }
+  }
+
+  inline hb_bool_t get_glyph_extents_for_origin (hb_codepoint_t glyph,
+						 hb_direction_t direction,
+						 hb_glyph_extents_t *extents)
+  {
+    hb_bool_t ret = get_glyph_extents (glyph, extents);
+
+    if (ret)
+      subtract_glyph_origin_for_direction (glyph, direction, &extents->x_bearing, &extents->y_bearing);
+
+    return ret;
+  }
+
+  inline hb_bool_t get_glyph_contour_point_for_origin (hb_codepoint_t glyph, unsigned int point_index,
+						       hb_direction_t direction,
+						       hb_position_t *x, hb_position_t *y)
+  {
+    hb_bool_t ret = get_glyph_contour_point (glyph, point_index, x, y);
+
+    if (ret)
+      subtract_glyph_origin_for_direction (glyph, direction, x, y);
+
+    return ret;
+  }
+
+  /* Generates gidDDD if glyph has no name. */
+  inline void
+  glyph_to_string (hb_codepoint_t glyph,
+		   char *s, unsigned int size)
+  {
+    if (get_glyph_name (glyph, s, size)) return;
+
+    snprintf (s, size, "gid%u", glyph);
+  }
+
+  /* Parses gidDDD and uniUUUU strings automatically. */
+  inline hb_bool_t
+  glyph_from_string (const char *s, int len, /* -1 means nul-terminated */
+		     hb_codepoint_t *glyph)
+  {
+    if (get_glyph_from_name (s, len, glyph)) return true;
+
+    if (len == -1) len = strlen (s);
+
+    /* Straight glyph index. */
+    if (hb_codepoint_parse (s, len, 10, glyph))
+      return true;
+
+    if (len > 3)
+    {
+      /* gidDDD syntax for glyph indices. */
+      if (0 == strncmp (s, "gid", 3) &&
+	  hb_codepoint_parse (s + 3, len - 3, 10, glyph))
+	return true;
+
+      /* uniUUUU and other Unicode character indices. */
+      hb_codepoint_t unichar;
+      if (0 == strncmp (s, "uni", 3) &&
+	  hb_codepoint_parse (s + 3, len - 3, 16, &unichar) &&
+	  get_glyph (unichar, 0, glyph))
+	return true;
+    }
+
+    return false;
+  }
+
   private:
   inline hb_position_t em_scale (int16_t v, int scale) { return v * (int64_t) scale / hb_face_get_upem (this->face); }
 };
 
+#define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
+#define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, font);
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+#undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
 
 
 #endif /* HB_FONT_PRIVATE_HH */