--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-shape-complex-myanmar.cc Mon Nov 23 09:58:44 2015 -0800
@@ -0,0 +1,532 @@
+/*
+ * Copyright © 2011,2012,2013 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
+ */
+
+#include "hb-ot-shape-complex-indic-private.hh"
+
+/* buffer var allocations */
+#define myanmar_category() complex_var_u8_0() /* myanmar_category_t */
+#define myanmar_position() complex_var_u8_1() /* myanmar_position_t */
+
+
+/*
+ * Myanmar shaper.
+ */
+
+static const hb_tag_t
+basic_features[] =
+{
+ /*
+ * Basic features.
+ * These features are applied in order, one at a time, after initial_reordering.
+ */
+ HB_TAG('r','p','h','f'),
+ HB_TAG('p','r','e','f'),
+ HB_TAG('b','l','w','f'),
+ HB_TAG('p','s','t','f'),
+};
+static const hb_tag_t
+other_features[] =
+{
+ /*
+ * Other features.
+ * These features are applied all at once, after final_reordering.
+ */
+ HB_TAG('p','r','e','s'),
+ HB_TAG('a','b','v','s'),
+ HB_TAG('b','l','w','s'),
+ HB_TAG('p','s','t','s'),
+ /* Positioning features, though we don't care about the types. */
+ HB_TAG('d','i','s','t'),
+ /* Pre-release version of Windows 8 Myanmar font had abvm,blwm
+ * features. The released Windows 8 version of the font (as well
+ * as the released spec) used 'mark' instead. The Windows 8
+ * shaper however didn't apply 'mark' but did apply 'mkmk'.
+ * Perhaps it applied abvm/blwm. This was fixed in a Windows 8
+ * update, so now it applies mark/mkmk. We are guessing that
+ * it still applies abvm/blwm too.
+ */
+ HB_TAG('a','b','v','m'),
+ HB_TAG('b','l','w','m'),
+};
+
+static void
+setup_syllables (const hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer);
+static void
+initial_reordering (const hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer);
+static void
+final_reordering (const hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer);
+
+static void
+collect_features_myanmar (hb_ot_shape_planner_t *plan)
+{
+ hb_ot_map_builder_t *map = &plan->map;
+
+ /* Do this before any lookups have been applied. */
+ map->add_gsub_pause (setup_syllables);
+
+ map->add_global_bool_feature (HB_TAG('l','o','c','l'));
+ /* The Indic specs do not require ccmp, but we apply it here since if
+ * there is a use of it, it's typically at the beginning. */
+ map->add_global_bool_feature (HB_TAG('c','c','m','p'));
+
+
+ map->add_gsub_pause (initial_reordering);
+ for (unsigned int i = 0; i < ARRAY_LENGTH (basic_features); i++)
+ {
+ map->add_feature (basic_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ);
+ map->add_gsub_pause (NULL);
+ }
+ map->add_gsub_pause (final_reordering);
+ for (unsigned int i = 0; i < ARRAY_LENGTH (other_features); i++)
+ map->add_feature (other_features[i], 1, F_GLOBAL | F_MANUAL_ZWJ);
+}
+
+static void
+override_features_myanmar (hb_ot_shape_planner_t *plan)
+{
+ plan->map.add_feature (HB_TAG('l','i','g','a'), 0, F_GLOBAL);
+}
+
+
+enum syllable_type_t {
+ consonant_syllable,
+ punctuation_cluster,
+ broken_cluster,
+ non_myanmar_cluster,
+};
+
+#include "hb-ot-shape-complex-myanmar-machine.hh"
+
+
+/* Note: This enum is duplicated in the -machine.rl source file.
+ * Not sure how to avoid duplication. */
+enum myanmar_category_t {
+ OT_As = 18, /* Asat */
+ OT_D = 19, /* Digits except zero */
+ OT_D0 = 20, /* Digit zero */
+ OT_DB = OT_N, /* Dot below */
+ OT_GB = OT_PLACEHOLDER,
+ OT_MH = 21, /* Various consonant medial types */
+ OT_MR = 22, /* Various consonant medial types */
+ OT_MW = 23, /* Various consonant medial types */
+ OT_MY = 24, /* Various consonant medial types */
+ OT_PT = 25, /* Pwo and other tones */
+ OT_VAbv = 26,
+ OT_VBlw = 27,
+ OT_VPre = 28,
+ OT_VPst = 29,
+ OT_VS = 30, /* Variation selectors */
+ OT_P = 31 /* Punctuation */
+};
+
+
+static inline bool
+is_one_of (const hb_glyph_info_t &info, unsigned int flags)
+{
+ /* If it ligated, all bets are off. */
+ if (_hb_glyph_info_ligated (&info)) return false;
+ return !!(FLAG_SAFE (info.myanmar_category()) & flags);
+}
+
+static inline bool
+is_consonant (const hb_glyph_info_t &info)
+{
+ return is_one_of (info, CONSONANT_FLAGS);
+}
+
+
+static inline void
+set_myanmar_properties (hb_glyph_info_t &info)
+{
+ hb_codepoint_t u = info.codepoint;
+ unsigned int type = hb_indic_get_categories (u);
+ indic_category_t cat = (indic_category_t) (type & 0x7Fu);
+ indic_position_t pos = (indic_position_t) (type >> 8);
+
+ /* Myanmar
+ * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm#analyze
+ */
+ if (unlikely (hb_in_range (u, 0xFE00u, 0xFE0Fu)))
+ cat = (indic_category_t) OT_VS;
+
+ switch (u)
+ {
+ case 0x104Eu:
+ cat = (indic_category_t) OT_C; /* The spec says C, IndicSyllableCategory doesn't have. */
+ break;
+
+ case 0x002Du: case 0x00A0u: case 0x00D7u: case 0x2012u:
+ case 0x2013u: case 0x2014u: case 0x2015u: case 0x2022u:
+ case 0x25CCu: case 0x25FBu: case 0x25FCu: case 0x25FDu:
+ case 0x25FEu:
+ cat = (indic_category_t) OT_GB;
+ break;
+
+ case 0x1004u: case 0x101Bu: case 0x105Au:
+ cat = (indic_category_t) OT_Ra;
+ break;
+
+ case 0x1032u: case 0x1036u:
+ cat = (indic_category_t) OT_A;
+ break;
+
+ case 0x103Au:
+ cat = (indic_category_t) OT_As;
+ break;
+
+ case 0x1041u: case 0x1042u: case 0x1043u: case 0x1044u:
+ case 0x1045u: case 0x1046u: case 0x1047u: case 0x1048u:
+ case 0x1049u: case 0x1090u: case 0x1091u: case 0x1092u:
+ case 0x1093u: case 0x1094u: case 0x1095u: case 0x1096u:
+ case 0x1097u: case 0x1098u: case 0x1099u:
+ cat = (indic_category_t) OT_D;
+ break;
+
+ case 0x1040u:
+ cat = (indic_category_t) OT_D; /* XXX The spec says D0, but Uniscribe doesn't seem to do. */
+ break;
+
+ case 0x103Eu: case 0x1060u:
+ cat = (indic_category_t) OT_MH;
+ break;
+
+ case 0x103Cu:
+ cat = (indic_category_t) OT_MR;
+ break;
+
+ case 0x103Du: case 0x1082u:
+ cat = (indic_category_t) OT_MW;
+ break;
+
+ case 0x103Bu: case 0x105Eu: case 0x105Fu:
+ cat = (indic_category_t) OT_MY;
+ break;
+
+ case 0x1063u: case 0x1064u: case 0x1069u: case 0x106Au:
+ case 0x106Bu: case 0x106Cu: case 0x106Du: case 0xAA7Bu:
+ cat = (indic_category_t) OT_PT;
+ break;
+
+ case 0x1038u: case 0x1087u: case 0x1088u: case 0x1089u:
+ case 0x108Au: case 0x108Bu: case 0x108Cu: case 0x108Du:
+ case 0x108Fu: case 0x109Au: case 0x109Bu: case 0x109Cu:
+ cat = (indic_category_t) OT_SM;
+ break;
+
+ case 0x104Au: case 0x104Bu:
+ cat = (indic_category_t) OT_P;
+ break;
+ }
+
+ if (cat == OT_M)
+ {
+ switch ((int) pos)
+ {
+ case POS_PRE_C: cat = (indic_category_t) OT_VPre;
+ pos = POS_PRE_M; break;
+ case POS_ABOVE_C: cat = (indic_category_t) OT_VAbv; break;
+ case POS_BELOW_C: cat = (indic_category_t) OT_VBlw; break;
+ case POS_POST_C: cat = (indic_category_t) OT_VPst; break;
+ }
+ }
+
+ info.myanmar_category() = (myanmar_category_t) cat;
+ info.myanmar_position() = pos;
+}
+
+
+
+static void
+setup_masks_myanmar (const hb_ot_shape_plan_t *plan HB_UNUSED,
+ hb_buffer_t *buffer,
+ hb_font_t *font HB_UNUSED)
+{
+ HB_BUFFER_ALLOCATE_VAR (buffer, myanmar_category);
+ HB_BUFFER_ALLOCATE_VAR (buffer, myanmar_position);
+
+ /* We cannot setup masks here. We save information about characters
+ * and setup masks later on in a pause-callback. */
+
+ unsigned int count = buffer->len;
+ hb_glyph_info_t *info = buffer->info;
+ for (unsigned int i = 0; i < count; i++)
+ set_myanmar_properties (info[i]);
+}
+
+static void
+setup_syllables (const hb_ot_shape_plan_t *plan HB_UNUSED,
+ hb_font_t *font HB_UNUSED,
+ hb_buffer_t *buffer)
+{
+ find_syllables (buffer);
+}
+
+static int
+compare_myanmar_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb)
+{
+ int a = pa->myanmar_position();
+ int b = pb->myanmar_position();
+
+ return a < b ? -1 : a == b ? 0 : +1;
+}
+
+
+/* Rules from:
+ * http://www.microsoft.com/typography/OpenTypeDev/myanmar/intro.htm */
+
+static void
+initial_reordering_consonant_syllable (hb_buffer_t *buffer,
+ unsigned int start, unsigned int end)
+{
+ hb_glyph_info_t *info = buffer->info;
+
+ unsigned int base = end;
+ bool has_reph = false;
+
+ {
+ unsigned int limit = start;
+ if (start + 3 <= end &&
+ info[start ].myanmar_category() == OT_Ra &&
+ info[start+1].myanmar_category() == OT_As &&
+ info[start+2].myanmar_category() == OT_H)
+ {
+ limit += 3;
+ base = start;
+ has_reph = true;
+ }
+
+ {
+ if (!has_reph)
+ base = limit;
+
+ for (unsigned int i = limit; i < end; i++)
+ if (is_consonant (info[i]))
+ {
+ base = i;
+ break;
+ }
+ }
+ }
+
+ /* Reorder! */
+ {
+ unsigned int i = start;
+ for (; i < start + (has_reph ? 3 : 0); i++)
+ info[i].myanmar_position() = POS_AFTER_MAIN;
+ for (; i < base; i++)
+ info[i].myanmar_position() = POS_PRE_C;
+ if (i < end)
+ {
+ info[i].myanmar_position() = POS_BASE_C;
+ i++;
+ }
+ indic_position_t pos = POS_AFTER_MAIN;
+ /* The following loop may be ugly, but it implements all of
+ * Myanmar reordering! */
+ for (; i < end; i++)
+ {
+ if (info[i].myanmar_category() == OT_MR) /* Pre-base reordering */
+ {
+ info[i].myanmar_position() = POS_PRE_C;
+ continue;
+ }
+ if (info[i].myanmar_position() < POS_BASE_C) /* Left matra */
+ {
+ continue;
+ }
+
+ if (pos == POS_AFTER_MAIN && info[i].myanmar_category() == OT_VBlw)
+ {
+ pos = POS_BELOW_C;
+ info[i].myanmar_position() = pos;
+ continue;
+ }
+
+ if (pos == POS_BELOW_C && info[i].myanmar_category() == OT_A)
+ {
+ info[i].myanmar_position() = POS_BEFORE_SUB;
+ continue;
+ }
+ if (pos == POS_BELOW_C && info[i].myanmar_category() == OT_VBlw)
+ {
+ info[i].myanmar_position() = pos;
+ continue;
+ }
+ if (pos == POS_BELOW_C && info[i].myanmar_category() != OT_A)
+ {
+ pos = POS_AFTER_SUB;
+ info[i].myanmar_position() = pos;
+ continue;
+ }
+ info[i].myanmar_position() = pos;
+ }
+ }
+
+ /* Sit tight, rock 'n roll! */
+ buffer->sort (start, end, compare_myanmar_order);
+}
+
+static void
+initial_reordering_syllable (const hb_ot_shape_plan_t *plan,
+ hb_face_t *face,
+ hb_buffer_t *buffer,
+ unsigned int start, unsigned int end)
+{
+ syllable_type_t syllable_type = (syllable_type_t) (buffer->info[start].syllable() & 0x0F);
+ switch (syllable_type) {
+
+ case broken_cluster: /* We already inserted dotted-circles, so just call the consonant_syllable. */
+ case consonant_syllable:
+ initial_reordering_consonant_syllable (buffer, start, end);
+ break;
+
+ case punctuation_cluster:
+ case non_myanmar_cluster:
+ break;
+ }
+}
+
+static inline void
+insert_dotted_circles (const hb_ot_shape_plan_t *plan HB_UNUSED,
+ hb_font_t *font,
+ hb_buffer_t *buffer)
+{
+ /* Note: This loop is extra overhead, but should not be measurable. */
+ bool has_broken_syllables = false;
+ unsigned int count = buffer->len;
+ hb_glyph_info_t *info = buffer->info;
+ for (unsigned int i = 0; i < count; i++)
+ if ((info[i].syllable() & 0x0F) == broken_cluster)
+ {
+ has_broken_syllables = true;
+ break;
+ }
+ if (likely (!has_broken_syllables))
+ return;
+
+
+ hb_codepoint_t dottedcircle_glyph;
+ if (!font->get_glyph (0x25CCu, 0, &dottedcircle_glyph))
+ return;
+
+ hb_glyph_info_t dottedcircle = {0};
+ dottedcircle.codepoint = 0x25CCu;
+ set_myanmar_properties (dottedcircle);
+ dottedcircle.codepoint = dottedcircle_glyph;
+
+ buffer->clear_output ();
+
+ buffer->idx = 0;
+ unsigned int last_syllable = 0;
+ while (buffer->idx < buffer->len)
+ {
+ unsigned int syllable = buffer->cur().syllable();
+ syllable_type_t syllable_type = (syllable_type_t) (syllable & 0x0F);
+ if (unlikely (last_syllable != syllable && syllable_type == broken_cluster))
+ {
+ last_syllable = syllable;
+
+ hb_glyph_info_t info = dottedcircle;
+ info.cluster = buffer->cur().cluster;
+ info.mask = buffer->cur().mask;
+ info.syllable() = buffer->cur().syllable();
+
+ buffer->output_info (info);
+ }
+ else
+ buffer->next_glyph ();
+ }
+
+ buffer->swap_buffers ();
+}
+
+static void
+initial_reordering (const hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer)
+{
+ insert_dotted_circles (plan, font, buffer);
+
+ foreach_syllable (buffer, start, end)
+ initial_reordering_syllable (plan, font->face, buffer, start, end);
+}
+
+static void
+final_reordering (const hb_ot_shape_plan_t *plan,
+ hb_font_t *font HB_UNUSED,
+ hb_buffer_t *buffer)
+{
+ hb_glyph_info_t *info = buffer->info;
+ unsigned int count = buffer->len;
+
+ /* Zero syllables now... */
+ for (unsigned int i = 0; i < count; i++)
+ info[i].syllable() = 0;
+
+ HB_BUFFER_DEALLOCATE_VAR (buffer, myanmar_category);
+ HB_BUFFER_DEALLOCATE_VAR (buffer, myanmar_position);
+}
+
+
+/* Uniscribe seems to have a shaper for 'mymr' that is like the
+ * generic shaper, except that it zeros mark advances GDEF_LATE. */
+const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar_old =
+{
+ "default",
+ NULL, /* collect_features */
+ NULL, /* override_features */
+ NULL, /* data_create */
+ NULL, /* data_destroy */
+ NULL, /* preprocess_text */
+ HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
+ NULL, /* decompose */
+ NULL, /* compose */
+ NULL, /* setup_masks */
+ HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
+ true, /* fallback_position */
+};
+
+const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar =
+{
+ "myanmar",
+ collect_features_myanmar,
+ override_features_myanmar,
+ NULL, /* data_create */
+ NULL, /* data_destroy */
+ NULL, /* preprocess_text */
+ HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
+ NULL, /* decompose */
+ NULL, /* compose */
+ setup_masks_myanmar,
+ HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
+ false, /* fallback_position */
+};