+++ /dev/null
-/*
- * 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
- */
-
-#ifndef HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH
-#define HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH
-
-#include "hb-private.hh"
-
-%%{
- machine sea_syllable_machine;
- alphtype unsigned char;
- write data;
-}%%
-
-%%{
-
-# Same order as enum sea_category_t. Not sure how to avoid duplication.
-C = 1;
-GB = 12; # Generic Base
-H = 4; # Halant
-IV = 2; # Independent Vowel
-MR = 22; # Medial Ra
-CM = 17; # Consonant Medial
-VAbv = 26;
-VBlw = 27;
-VPre = 28;
-VPst = 29;
-T = 3; # Tone Marks
-A = 10; # Anusvara
-
-syllable_tail = (VPre|VAbv|VBlw|VPst|H.C|CM|MR|T|A)*;
-
-consonant_syllable = (C|IV|GB) syllable_tail;
-broken_cluster = syllable_tail;
-other = any;
-
-main := |*
- consonant_syllable => { found_syllable (consonant_syllable); };
- broken_cluster => { found_syllable (broken_cluster); };
- other => { found_syllable (non_sea_cluster); };
-*|;
-
-
-}%%
-
-#define found_syllable(syllable_type) \
- HB_STMT_START { \
- if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \
- for (unsigned int i = last; i < p+1; i++) \
- info[i].syllable() = (syllable_serial << 4) | syllable_type; \
- last = p+1; \
- syllable_serial++; \
- if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
- } HB_STMT_END
-
-static void
-find_syllables (hb_buffer_t *buffer)
-{
- unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;
- int cs;
- hb_glyph_info_t *info = buffer->info;
- %%{
- write init;
- getkey info[p].sea_category();
- }%%
-
- p = 0;
- pe = eof = buffer->len;
-
- unsigned int last = 0;
- unsigned int syllable_serial = 1;
- %%{
- write exec;
- }%%
-}
-
-#undef found_syllable
-
-#endif /* HB_OT_SHAPE_COMPLEX_SEA_MACHINE_HH */
+++ /dev/null
-/*
- * 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 sea_category() complex_var_u8_0() /* indic_category_t */
-#define sea_position() complex_var_u8_1() /* indic_position_t */
-
-
-/*
- * South-East Asian shaper.
- * Loosely based on the Myanmar spec / shaper.
- * There is no OpenType spec for this.
- */
-
-static const hb_tag_t
-basic_features[] =
-{
- /*
- * Basic features.
- * These features are applied in order, one at a time, after initial_reordering.
- */
- HB_TAG('p','r','e','f'),
- HB_TAG('a','b','v','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'),
-};
-
-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_sea (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_sea (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,
- broken_cluster,
- non_sea_cluster,
-};
-
-#include "hb-ot-shape-complex-sea-machine.hh"
-
-
-/* Note: This enum is duplicated in the -machine.rl source file.
- * Not sure how to avoid duplication. */
-enum sea_category_t {
-// OT_C = 1,
- OT_GB = 12, /* Generic Base XXX DOTTED CIRCLE only for now */
-// OT_H = 4, /* Halant */
- OT_IV = 2, /* Independent Vowel */
- OT_MR = 22, /* Medial Ra */
-// OT_CM = 17, /* Consonant Medial */
- OT_VAbv = 26,
- OT_VBlw = 27,
- OT_VPre = 28,
- OT_VPst = 29,
- OT_T = 3, /* Tone Marks */
-// OT_A = 10, /* Anusvara */
-};
-
-static inline void
-set_sea_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);
-
- /* Medial Ra */
- if (u == 0x1A55u || u == 0xAA34u)
- cat = (indic_category_t) OT_MR;
-
- if (cat == OT_M)
- {
- switch ((int) pos)
- {
- case POS_PRE_C: cat = (indic_category_t) OT_VPre; 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.sea_category() = (sea_category_t) cat;
- info.sea_position() = pos;
-}
-
-
-static void
-setup_masks_sea (const hb_ot_shape_plan_t *plan HB_UNUSED,
- hb_buffer_t *buffer,
- hb_font_t *font HB_UNUSED)
-{
- HB_BUFFER_ALLOCATE_VAR (buffer, sea_category);
- HB_BUFFER_ALLOCATE_VAR (buffer, sea_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_sea_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_sea_order (const hb_glyph_info_t *pa, const hb_glyph_info_t *pb)
-{
- int a = pa->sea_position();
- int b = pb->sea_position();
-
- return a < b ? -1 : a == b ? 0 : +1;
-}
-
-
-static void
-initial_reordering_consonant_syllable (const hb_ot_shape_plan_t *plan,
- hb_face_t *face,
- hb_buffer_t *buffer,
- unsigned int start, unsigned int end)
-{
- hb_glyph_info_t *info = buffer->info;
- unsigned int base = start;
-
- /* Reorder! */
- unsigned int i = start;
- for (; i < base; i++)
- info[i].sea_position() = POS_PRE_C;
- if (i < end)
- {
- info[i].sea_position() = POS_BASE_C;
- i++;
- }
- for (; i < end; i++)
- {
- if (info[i].sea_category() == OT_MR) /* Pre-base reordering */
- {
- info[i].sea_position() = POS_PRE_C;
- continue;
- }
- if (info[i].sea_category() == OT_VPre) /* Left matra */
- {
- info[i].sea_position() = POS_PRE_M;
- continue;
- }
-
- info[i].sea_position() = POS_AFTER_MAIN;
- }
-
- buffer->merge_clusters (start, end);
- /* Sit tight, rock 'n roll! */
- hb_bubble_sort (info + start, end - start, compare_sea_order);
-}
-
-static void
-initial_reordering_broken_cluster (const hb_ot_shape_plan_t *plan,
- hb_face_t *face,
- hb_buffer_t *buffer,
- unsigned int start, unsigned int end)
-{
- /* We already inserted dotted-circles, so just call the consonant_syllable. */
- initial_reordering_consonant_syllable (plan, face, buffer, start, end);
-}
-
-static void
-initial_reordering_non_sea_cluster (const hb_ot_shape_plan_t *plan HB_UNUSED,
- hb_face_t *face HB_UNUSED,
- hb_buffer_t *buffer HB_UNUSED,
- unsigned int start HB_UNUSED, unsigned int end HB_UNUSED)
-{
- /* Nothing to do right now. If we ever switch to using the output
- * buffer in the reordering process, we'd need to next_glyph() here. */
-}
-
-
-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 consonant_syllable: initial_reordering_consonant_syllable (plan, face, buffer, start, end); return;
- case broken_cluster: initial_reordering_broken_cluster (plan, face, buffer, start, end); return;
- case non_sea_cluster: initial_reordering_non_sea_cluster (plan, face, buffer, start, end); return;
- }
-}
-
-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_sea_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);
-
- hb_glyph_info_t *info = buffer->info;
- unsigned int count = buffer->len;
- if (unlikely (!count)) return;
- unsigned int last = 0;
- unsigned int last_syllable = info[0].syllable();
- for (unsigned int i = 1; i < count; i++)
- if (last_syllable != info[i].syllable()) {
- initial_reordering_syllable (plan, font->face, buffer, last, i);
- last = i;
- last_syllable = info[last].syllable();
- }
- initial_reordering_syllable (plan, font->face, buffer, last, count);
-}
-
-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, sea_category);
- HB_BUFFER_DEALLOCATE_VAR (buffer, sea_position);
-}
-
-
-const hb_ot_complex_shaper_t _hb_ot_complex_shaper_sea =
-{
- "sea",
- collect_features_sea,
- override_features_sea,
- 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_sea,
- HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
- false, /* fallback_position */
-};
projects / platform / upstream / libHarfBuzzSharp.git / commitdiff