Add normalize mode

In preparation for Hangul shaper.

src/Makefile.am

@@ -70,6 +70,7 @@ HBSOURCES += \
 	hb-ot-shape-complex-indic-table.hh \
 	hb-ot-shape-complex-misc.cc \
 	hb-ot-shape-complex-private.hh \
+	hb-ot-shape-normalize-private.hh \
 	hb-ot-shape-normalize.cc \
 	hb-ot-shape-private.hh \
 	$(NULL)

src/hb-ot-layout-common-private.hh

@@ -30,7 +30,6 @@
 #define HB_OT_LAYOUT_COMMON_PRIVATE_HH
 
 #include "hb-ot-layout-private.hh"
-
 #include "hb-open-type-private.hh"
 
 

src/hb-ot-shape-complex-arabic.cc

@@ -183,10 +183,10 @@ _hb_ot_shape_complex_collect_features_arabic (hb_ot_map_builder_t *map, const hb
   map->add_bool_feature (HB_TAG('c','s','w','h'));
 }
 
-bool
-_hb_ot_shape_complex_prefer_decomposed_arabic (void)
+hb_ot_shape_normalization_mode_t
+_hb_ot_shape_complex_normalization_preference_arabic (void)
 {
-  return FALSE;
+  return HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS;
 }
 
 void

src/hb-ot-shape-complex-indic.cc

@@ -369,11 +369,11 @@ _hb_ot_shape_complex_collect_features_indic (hb_ot_map_builder_t *map, const hb_
 }
 
 
-bool
-_hb_ot_shape_complex_prefer_decomposed_indic (void)
+hb_ot_shape_normalization_mode_t
+_hb_ot_shape_complex_normalization_preference_indic (void)
 {
   /* We want split matras decomposed by the common shaping logic. */
-  return TRUE;
+  return HB_OT_SHAPE_NORMALIZATION_MODE_DECOMPOSED;
 }
 
 

src/hb-ot-shape-complex-misc.cc

@@ -27,7 +27,7 @@
 #include "hb-ot-shape-complex-private.hh"
 
 
-/* TODO Add kana, hangul, and other small sahpers here */
+/* TODO Add kana, hangul, and other small shapers here */
 
 /* When adding trivial shapers, eg. kana, hangul, etc, we can either
  * add a full shaper enum value for them, or switch on the script in
@@ -41,10 +41,10 @@ _hb_ot_shape_complex_collect_features_default (hb_ot_map_builder_t *map, const h
 {
 }
 
-bool
-_hb_ot_shape_complex_prefer_decomposed_default (void)
+hb_ot_shape_normalization_mode_t
+_hb_ot_shape_complex_normalization_preference_default (void)
 {
-  return FALSE;
+  return HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS;
 }
 
 void

src/hb-ot-shape-complex-private.hh

@@ -30,6 +30,7 @@
 #include "hb-private.hh"
 
 #include "hb-ot-map-private.hh"
+#include "hb-ot-shape-normalize-private.hh"
 
 
 
@@ -227,26 +228,26 @@ hb_ot_shape_complex_collect_features (hb_ot_complex_shaper_t shaper,
 
 
 /*
- * prefer_decomposed()
+ * normalization_preference()
  *
  * Called during shape_execute().
  *
  * Shapers should return TRUE if it prefers decomposed (NFD) input rather than precomposed (NFC).
  */
 
-typedef bool hb_ot_shape_complex_prefer_decomposed_func_t (void);
+typedef hb_ot_shape_normalization_mode_t hb_ot_shape_complex_normalization_preference_func_t (void);
 #define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
-  HB_INTERNAL hb_ot_shape_complex_prefer_decomposed_func_t _hb_ot_shape_complex_prefer_decomposed_##name;
+  HB_INTERNAL hb_ot_shape_complex_normalization_preference_func_t _hb_ot_shape_complex_normalization_preference_##name;
   HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
 #undef HB_COMPLEX_SHAPER_IMPLEMENT
 
-static inline bool
-hb_ot_shape_complex_prefer_decomposed (hb_ot_complex_shaper_t shaper)
+static inline hb_ot_shape_normalization_mode_t
+hb_ot_shape_complex_normalization_preference (hb_ot_complex_shaper_t shaper)
 {
   switch (shaper) {
     default:
 #define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
-    case hb_ot_complex_shaper_##name:	return _hb_ot_shape_complex_prefer_decomposed_##name ();
+    case hb_ot_complex_shaper_##name:	return _hb_ot_shape_complex_normalization_preference_##name ();
     HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
 #undef HB_COMPLEX_SHAPER_IMPLEMENT
   }

src/hb-ot-shape-normalize-private.hh

+/*
+ * Copyright © 2012  Google, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_SHAPE_NORMALIZE_PRIVATE_HH
+#define HB_OT_SHAPE_NORMALIZE_PRIVATE_HH
+
+#include "hb-private.hh"
+
+#include "hb-font.h"
+#include "hb-buffer.h"
+
+
+enum hb_ot_shape_normalization_mode_t {
+  HB_OT_SHAPE_NORMALIZATION_MODE_DECOMPOSED,
+  HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS, /* never composes base-to-base */
+  HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_FULL /* including base-to-base composition */
+};
+
+HB_INTERNAL void _hb_ot_shape_normalize (hb_font_t *font,
+					 hb_buffer_t *buffer,
+					 hb_ot_shape_normalization_mode_t mode);
+
+#endif /* HB_OT_SHAPE_NORMALIZE_PRIVATE_HH */

src/hb-ot-shape-normalize.cc

 /*
- * Copyright © 2011  Google, Inc.
+ * Copyright © 2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
@@ -24,8 +24,8 @@
  * Google Author(s): Behdad Esfahbod
  */
 
+#include "hb-ot-shape-normalize-private.hh"
 #include "hb-ot-shape-private.hh"
-#include "hb-ot-shape-complex-private.hh"
 
 
 /*
@@ -69,45 +69,43 @@
  */
 
 static void
-output_glyph (hb_ot_shape_context_t *c,
+output_glyph (hb_font_t *font, hb_buffer_t *buffer,
 	      hb_codepoint_t glyph)
 {
-  hb_buffer_t *buffer = c->buffer;
-
   buffer->output_glyph (glyph);
   hb_glyph_info_set_unicode_props (&buffer->out_info[buffer->out_len - 1], buffer->unicode);
 }
 
 static bool
-decompose (hb_ot_shape_context_t *c,
+decompose (hb_font_t *font, hb_buffer_t *buffer,
 	   bool shortest,
 	   hb_codepoint_t ab)
 {
   hb_codepoint_t a, b, glyph;
 
-  if (!hb_unicode_decompose (c->buffer->unicode, ab, &a, &b) ||
-      (b && !hb_font_get_glyph (c->font, b, 0, &glyph)))
+  if (!hb_unicode_decompose (buffer->unicode, ab, &a, &b) ||
+      (b && !hb_font_get_glyph (font, b, 0, &glyph)))
     return FALSE;
 
-  bool has_a = hb_font_get_glyph (c->font, a, 0, &glyph);
+  bool has_a = hb_font_get_glyph (font, a, 0, &glyph);
   if (shortest && has_a) {
     /* Output a and b */
-    output_glyph (c, a);
+    output_glyph (font, buffer, a);
     if (b)
-      output_glyph (c, b);
+      output_glyph (font, buffer, b);
     return TRUE;
   }
 
-  if (decompose (c, shortest, a)) {
+  if (decompose (font, buffer, shortest, a)) {
     if (b)
-      output_glyph (c, b);
+      output_glyph (font, buffer, b);
     return TRUE;
   }
 
   if (has_a) {
-    output_glyph (c, a);
+    output_glyph (font, buffer, a);
     if (b)
-      output_glyph (c, b);
+      output_glyph (font, buffer, b);
     return TRUE;
   }
 
@@ -115,44 +113,44 @@ decompose (hb_ot_shape_context_t *c,
 }
 
 static void
-decompose_current_glyph (hb_ot_shape_context_t *c,
+decompose_current_glyph (hb_font_t *font, hb_buffer_t *buffer,
 			 bool shortest)
 {
-  if (decompose (c, shortest, c->buffer->info[c->buffer->idx].codepoint))
-    c->buffer->skip_glyph ();
+  if (decompose (font, buffer, shortest, buffer->info[buffer->idx].codepoint))
+    buffer->skip_glyph ();
   else
-    c->buffer->next_glyph ();
+    buffer->next_glyph ();
 }
 
 static void
-decompose_single_char_cluster (hb_ot_shape_context_t *c,
+decompose_single_char_cluster (hb_font_t *font, hb_buffer_t *buffer,
 			       bool will_recompose)
 {
   hb_codepoint_t glyph;
 
   /* If recomposing and font supports this, we're good to go */
-  if (will_recompose && hb_font_get_glyph (c->font, c->buffer->info[c->buffer->idx].codepoint, 0, &glyph)) {
-    c->buffer->next_glyph ();
+  if (will_recompose && hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, 0, &glyph)) {
+    buffer->next_glyph ();
     return;
   }
 
-  decompose_current_glyph (c, will_recompose);
+  decompose_current_glyph (font, buffer, will_recompose);
 }
 
 static void
-decompose_multi_char_cluster (hb_ot_shape_context_t *c,
+decompose_multi_char_cluster (hb_font_t *font, hb_buffer_t *buffer,
 			      unsigned int end)
 {
   /* TODO Currently if there's a variation-selector we give-up, it's just too hard. */
-  for (unsigned int i = c->buffer->idx; i < end; i++)
-    if (unlikely (_hb_unicode_is_variation_selector (c->buffer->info[i].codepoint))) {
-      while (c->buffer->idx < end)
-	c->buffer->next_glyph ();
+  for (unsigned int i = buffer->idx; i < end; i++)
+    if (unlikely (_hb_unicode_is_variation_selector (buffer->info[i].codepoint))) {
+      while (buffer->idx < end)
+	buffer->next_glyph ();
       return;
     }
 
-  while (c->buffer->idx < end)
-    decompose_current_glyph (c, FALSE);
+  while (buffer->idx < end)
+    decompose_current_glyph (font, buffer, FALSE);
 }
 
 static int
@@ -165,10 +163,10 @@ compare_combining_class (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb)
 }
 
 void
-_hb_ot_shape_normalize (hb_ot_shape_context_t *c)
+_hb_ot_shape_normalize (hb_font_t *font, hb_buffer_t *buffer,
+			hb_ot_shape_normalization_mode_t mode)
 {
-  hb_buffer_t *buffer = c->buffer;
-  bool recompose = !hb_ot_shape_complex_prefer_decomposed (c->plan->shaper);
+  bool recompose = mode != HB_OT_SHAPE_NORMALIZATION_MODE_DECOMPOSED;
   bool has_multichar_clusters = FALSE;
   unsigned int count;
 
@@ -191,9 +189,9 @@ _hb_ot_shape_normalize (hb_ot_shape_context_t *c)
         break;
 
     if (buffer->idx + 1 == end)
-      decompose_single_char_cluster (c, recompose);
+      decompose_single_char_cluster (font, buffer, recompose);
     else {
-      decompose_multi_char_cluster (c, end);
+      decompose_multi_char_cluster (font, buffer, end);
       has_multichar_clusters = TRUE;
     }
   }
@@ -265,11 +263,11 @@ _hb_ot_shape_normalize (hb_ot_shape_context_t *c)
     hb_codepoint_t composed, glyph;
     if ((buffer->out_info[buffer->out_len - 1].combining_class() >=
 	 buffer->info[buffer->idx].combining_class()) ||
-	!hb_unicode_compose (c->buffer->unicode,
+	!hb_unicode_compose (buffer->unicode,
 			     buffer->out_info[starter].codepoint,
 			     buffer->info[buffer->idx].codepoint,
 			     &composed) ||
-	!hb_font_get_glyph (c->font, composed, 0, &glyph))
+	!hb_font_get_glyph (font, composed, 0, &glyph))
     {
       /* Blocked, or doesn't compose. */
       buffer->next_glyph ();
@@ -285,4 +283,3 @@ _hb_ot_shape_normalize (hb_ot_shape_context_t *c)
   buffer->swap_buffers ();
 
 }
-

src/hb-ot-shape-private.hh

@@ -33,11 +33,9 @@
 
 #include "hb-ot-map-private.hh"
 #include "hb-ot-shape-complex-private.hh"
+#include "hb-ot-shape-normalize-private.hh"
 
 
-
-enum hb_ot_complex_shaper_t;
-
 struct hb_ot_shape_plan_t
 {
   friend struct hb_ot_shape_planner_t;
@@ -99,7 +97,6 @@ hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_unicode_funcs_t *unic
 
 HB_INTERNAL void _hb_set_unicode_props (hb_buffer_t *buffer);
 
-HB_INTERNAL void _hb_ot_shape_normalize (hb_ot_shape_context_t *c);
-
+#include "hb-ot-shape-complex-private.hh"
 
 #endif /* HB_OT_SHAPE_PRIVATE_HH */

src/hb-ot-shape.cc

@@ -362,7 +362,7 @@ hb_ot_shape_execute_internal (hb_ot_shape_context_t *c)
 
   hb_ensure_native_direction (c->buffer);
 
-  _hb_ot_shape_normalize (c);
+  _hb_ot_shape_normalize (c->font, c->buffer, hb_ot_shape_complex_normalization_preference (c->plan->shaper));
 
   hb_ot_shape_setup_masks (c);