From 3992b5ec4cb43d114d87ff7ee2b992bcf819c9cd Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Sat, 1 Sep 2012 19:20:41 -0400
Subject: [PATCH] Move code around

---
 src/hb-ot-shape-fallback-private.hh |  5 ++++
 src/hb-ot-shape-fallback.cc         | 46 +++++++++++++++++++----------
 src/hb-ot-shape-private.hh          |  6 ++++
 src/hb-ot-shape.cc                  |  4 +++
 4 files changed, 46 insertions(+), 15 deletions(-)

diff --git a/src/hb-ot-shape-fallback-private.hh b/src/hb-ot-shape-fallback-private.hh
index be96c4f19..5e9cb0617 100644
--- a/src/hb-ot-shape-fallback-private.hh
+++ b/src/hb-ot-shape-fallback-private.hh
@@ -36,4 +36,9 @@ HB_INTERNAL void _hb_ot_shape_fallback_position (const hb_ot_shape_plan_t *plan,
 						 hb_font_t *font,
 						 hb_buffer_t  *buffer);
 
+HB_INTERNAL void _hb_ot_shape_fallback_position_recategorize_marks (const hb_ot_shape_plan_t *plan,
+								    hb_font_t *font,
+								    hb_buffer_t  *buffer);
+
+
 #endif /* HB_OT_SHAPE_FALLBACK_PRIVATE_HH */
diff --git a/src/hb-ot-shape-fallback.cc b/src/hb-ot-shape-fallback.cc
index abacfa3a3..b88fa8307 100644
--- a/src/hb-ot-shape-fallback.cc
+++ b/src/hb-ot-shape-fallback.cc
@@ -26,21 +26,9 @@
 
 #include "hb-ot-shape-fallback-private.hh"
 
-static void
-zero_mark_advances (hb_buffer_t *buffer,
-		    unsigned int start,
-		    unsigned int end)
-{
-  for (unsigned int i = start; i < end; i++)
-    if (_hb_glyph_info_get_general_category (&buffer->info[i]) == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)
-    {
-      buffer->pos[i].x_advance = 0;
-      buffer->pos[i].y_advance = 0;
-    }
-}
-
 static unsigned int
-recategorize_combining_class (unsigned int modified_combining_class)
+recategorize_combining_class (hb_codepoint_t u,
+			      unsigned int modified_combining_class)
 {
   if (modified_combining_class >= 200)
     return modified_combining_class;
@@ -136,6 +124,34 @@ recategorize_combining_class (unsigned int modified_combining_class)
   return modified_combining_class;
 }
 
+void
+_hb_ot_shape_fallback_position_recategorize_marks (const hb_ot_shape_plan_t *plan,
+						   hb_font_t *font,
+						   hb_buffer_t  *buffer)
+{
+  unsigned int count = buffer->len;
+  for (unsigned int i = 0; i < count; i++)
+    if (_hb_glyph_info_get_general_category (&buffer->info[i]) == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) {
+      unsigned int combining_class = _hb_glyph_info_get_modified_combining_class (&buffer->info[i]);
+      combining_class = recategorize_combining_class (buffer->info[i].codepoint, combining_class);
+      _hb_glyph_info_set_modified_combining_class (&buffer->info[i], combining_class);
+    }
+}
+
+
+static void
+zero_mark_advances (hb_buffer_t *buffer,
+		    unsigned int start,
+		    unsigned int end)
+{
+  for (unsigned int i = start; i < end; i++)
+    if (_hb_glyph_info_get_general_category (&buffer->info[i]) == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)
+    {
+      buffer->pos[i].x_advance = 0;
+      buffer->pos[i].y_advance = 0;
+    }
+}
+
 static inline void
 position_mark (const hb_ot_shape_plan_t *plan,
 	       hb_font_t *font,
@@ -259,7 +275,7 @@ position_around_base (const hb_ot_shape_plan_t *plan,
   for (unsigned int i = base + 1; i < end; i++)
     if (_hb_glyph_info_get_modified_combining_class (&buffer->info[i]))
     {
-      unsigned int this_combining_class = recategorize_combining_class (_hb_glyph_info_get_modified_combining_class (&buffer->info[i]));
+      unsigned int this_combining_class = _hb_glyph_info_get_modified_combining_class (&buffer->info[i]);
       if (this_combining_class != last_combining_class)
         cluster_extents = base_extents;
 
diff --git a/src/hb-ot-shape-private.hh b/src/hb-ot-shape-private.hh
index f85604554..c4c368db7 100644
--- a/src/hb-ot-shape-private.hh
+++ b/src/hb-ot-shape-private.hh
@@ -95,6 +95,12 @@ _hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
   return (hb_unicode_general_category_t) (info->unicode_props0() & 0x7F);
 }
 
+inline void
+_hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, unsigned int modified_class)
+{
+  info->unicode_props1() = modified_class;
+}
+
 inline unsigned int
 _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
 {
diff --git a/src/hb-ot-shape.cc b/src/hb-ot-shape.cc
index 929406e1b..26b21ce4a 100644
--- a/src/hb-ot-shape.cc
+++ b/src/hb-ot-shape.cc
@@ -345,6 +345,10 @@ hb_ot_substitute_default (hb_ot_shape_context_t *c)
 
   hb_ot_shape_setup_masks (c);
 
+  /* This is unfortunate to go here, but necessary... */
+  if (!hb_ot_layout_has_positioning (c->face))
+    _hb_ot_shape_fallback_position_recategorize_marks (c->plan, c->font, c->buffer);
+
   hb_ot_map_glyphs_fast (c->buffer);
 
   HB_BUFFER_DEALLOCATE_VAR (c->buffer, glyph_index);