diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.12/src/hb-ot-shape-complex-arabic-fallback.hh')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-0.9.12/src/hb-ot-shape-complex-arabic-fallback.hh | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.12/src/hb-ot-shape-complex-arabic-fallback.hh b/Build/source/libs/harfbuzz/harfbuzz-0.9.12/src/hb-ot-shape-complex-arabic-fallback.hh deleted file mode 100644 index 4fcd0a2fd94..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-0.9.12/src/hb-ot-shape-complex-arabic-fallback.hh +++ /dev/null @@ -1,253 +0,0 @@ -/* - * 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_COMPLEX_ARABIC_FALLBACK_HH -#define HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH - -#include "hb-private.hh" - -#include "hb-ot-shape-private.hh" -#include "hb-ot-layout-gsub-table.hh" - - -static const hb_tag_t arabic_fallback_features[] = -{ - HB_TAG('i','n','i','t'), - HB_TAG('m','e','d','i'), - HB_TAG('f','i','n','a'), - HB_TAG('i','s','o','l'), - HB_TAG('r','l','i','g'), -}; - -/* Same order as the fallback feature array */ -enum { - FALLBACK_INIT, - FALLBACK_MEDI, - FALLBACK_FINA, - FALLBACK_ISOL, - FALLBACK_RLIG, - ARABIC_NUM_FALLBACK_FEATURES -}; - -static OT::SubstLookup * -arabic_fallback_synthesize_lookup_single (const hb_ot_shape_plan_t *plan HB_UNUSED, - hb_font_t *font, - unsigned int feature_index) -{ - OT::GlyphID glyphs[SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1]; - OT::GlyphID substitutes[SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1]; - unsigned int num_glyphs = 0; - - /* Populate arrays */ - for (hb_codepoint_t u = SHAPING_TABLE_FIRST; u < SHAPING_TABLE_LAST + 1; u++) - { - hb_codepoint_t s = shaping_table[u - SHAPING_TABLE_FIRST][feature_index]; - hb_codepoint_t u_glyph, s_glyph; - - if (!s || - !hb_font_get_glyph (font, u, 0, &u_glyph) || - !hb_font_get_glyph (font, s, 0, &s_glyph) || - u_glyph == s_glyph || - u_glyph > 0xFFFF || s_glyph > 0xFFFF) - continue; - - glyphs[num_glyphs].set (u_glyph); - substitutes[num_glyphs].set (s_glyph); - - num_glyphs++; - } - - /* Bubble-sort! - * May not be good-enough for presidential candidate interviews, but good-enough for us... */ - hb_bubble_sort (&glyphs[0], num_glyphs, OT::GlyphID::cmp, &substitutes[0]); - - OT::Supplier<OT::GlyphID> glyphs_supplier (glyphs, num_glyphs); - OT::Supplier<OT::GlyphID> substitutes_supplier (substitutes, num_glyphs); - - /* Each glyph takes four bytes max, and there's some overhead. */ - char buf[(SHAPING_TABLE_LAST - SHAPING_TABLE_FIRST + 1) * 4 + 128]; - OT::hb_serialize_context_t c (buf, sizeof (buf)); - OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> (); - bool ret = lookup->serialize_single (&c, - OT::LookupFlag::IgnoreMarks, - glyphs_supplier, - substitutes_supplier, - num_glyphs); - c.end_serialize (); - /* TODO sanitize the results? */ - - return ret ? c.copy<OT::SubstLookup> () : NULL; -} - -static OT::SubstLookup * -arabic_fallback_synthesize_lookup_ligature (const hb_ot_shape_plan_t *plan HB_UNUSED, - hb_font_t *font) -{ - OT::GlyphID first_glyphs[ARRAY_LENGTH_CONST (ligature_table)]; - unsigned int first_glyphs_indirection[ARRAY_LENGTH_CONST (ligature_table)]; - unsigned int ligature_per_first_glyph_count_list[ARRAY_LENGTH_CONST (first_glyphs)]; - unsigned int num_first_glyphs = 0; - - /* We know that all our ligatures are 2-component */ - OT::GlyphID ligature_list[ARRAY_LENGTH_CONST (first_glyphs) * ARRAY_LENGTH_CONST(ligature_table[0].ligatures)]; - unsigned int component_count_list[ARRAY_LENGTH_CONST (ligature_list)]; - OT::GlyphID component_list[ARRAY_LENGTH_CONST (ligature_list) * 1/* One extra component per ligature */]; - unsigned int num_ligatures = 0; - - /* Populate arrays */ - - /* Sort out the first-glyphs */ - for (unsigned int first_glyph_idx = 0; first_glyph_idx < ARRAY_LENGTH (first_glyphs); first_glyph_idx++) - { - hb_codepoint_t first_u = ligature_table[first_glyph_idx].first; - hb_codepoint_t first_glyph; - if (!hb_font_get_glyph (font, first_u, 0, &first_glyph)) - continue; - first_glyphs[num_first_glyphs].set (first_glyph); - ligature_per_first_glyph_count_list[num_first_glyphs] = 0; - first_glyphs_indirection[num_first_glyphs] = first_glyph_idx; - num_first_glyphs++; - } - hb_bubble_sort (&first_glyphs[0], num_first_glyphs, OT::GlyphID::cmp, &first_glyphs_indirection[0]); - - /* Now that the first-glyphs are sorted, walk again, populate ligatures. */ - for (unsigned int i = 0; i < num_first_glyphs; i++) - { - unsigned int first_glyph_idx = first_glyphs_indirection[i]; - - for (unsigned int second_glyph_idx = 0; second_glyph_idx < ARRAY_LENGTH (ligature_table[0].ligatures); second_glyph_idx++) - { - hb_codepoint_t second_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].second; - hb_codepoint_t ligature_u = ligature_table[first_glyph_idx].ligatures[second_glyph_idx].ligature; - hb_codepoint_t second_glyph, ligature_glyph; - if (!second_u || - !hb_font_get_glyph (font, second_u, 0, &second_glyph) || - !hb_font_get_glyph (font, ligature_u, 0, &ligature_glyph)) - continue; - - ligature_per_first_glyph_count_list[i]++; - - ligature_list[num_ligatures].set (ligature_glyph); - component_count_list[num_ligatures] = 2; - component_list[num_ligatures].set (second_glyph); - num_ligatures++; - } - } - - OT::Supplier<OT::GlyphID> first_glyphs_supplier (first_glyphs, num_first_glyphs); - OT::Supplier<unsigned int > ligature_per_first_glyph_count_supplier (ligature_per_first_glyph_count_list, num_first_glyphs); - OT::Supplier<OT::GlyphID> ligatures_supplier (ligature_list, num_ligatures); - OT::Supplier<unsigned int > component_count_supplier (component_count_list, num_ligatures); - OT::Supplier<OT::GlyphID> component_supplier (component_list, num_ligatures); - - /* 16 bytes per ligature ought to be enough... */ - char buf[ARRAY_LENGTH_CONST (ligature_list) * 16 + 128]; - OT::hb_serialize_context_t c (buf, sizeof (buf)); - OT::SubstLookup *lookup = c.start_serialize<OT::SubstLookup> (); - bool ret = lookup->serialize_ligature (&c, - OT::LookupFlag::IgnoreMarks, - first_glyphs_supplier, - ligature_per_first_glyph_count_supplier, - num_first_glyphs, - ligatures_supplier, - component_count_supplier, - component_supplier); - - c.end_serialize (); - /* TODO sanitize the results? */ - - return ret ? c.copy<OT::SubstLookup> () : NULL; -} - -static OT::SubstLookup * -arabic_fallback_synthesize_lookup (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - unsigned int feature_index) -{ - if (feature_index < 4) - return arabic_fallback_synthesize_lookup_single (plan, font, feature_index); - else - return arabic_fallback_synthesize_lookup_ligature (plan, font); -} - -struct arabic_fallback_plan_t -{ - ASSERT_POD (); - - hb_mask_t mask_array[ARABIC_NUM_FALLBACK_FEATURES]; - OT::SubstLookup *lookup_array[ARABIC_NUM_FALLBACK_FEATURES]; - hb_set_digest_t digest_array[ARABIC_NUM_FALLBACK_FEATURES]; -}; - -static const arabic_fallback_plan_t arabic_fallback_plan_nil = {}; - -static arabic_fallback_plan_t * -arabic_fallback_plan_create (const hb_ot_shape_plan_t *plan, - hb_font_t *font) -{ - arabic_fallback_plan_t *fallback_plan = (arabic_fallback_plan_t *) calloc (1, sizeof (arabic_fallback_plan_t)); - if (unlikely (!fallback_plan)) - return const_cast<arabic_fallback_plan_t *> (&arabic_fallback_plan_nil); - - for (unsigned int i = 0; i < ARABIC_NUM_FALLBACK_FEATURES; i++) { - fallback_plan->mask_array[i] = plan->map.get_1_mask (arabic_fallback_features[i]); - if (fallback_plan->mask_array[i]) { - fallback_plan->lookup_array[i] = arabic_fallback_synthesize_lookup (plan, font, i); - if (fallback_plan->lookup_array[i]) - fallback_plan->lookup_array[i]->add_coverage (&fallback_plan->digest_array[i]); - } - } - - return fallback_plan; -} - -static void -arabic_fallback_plan_destroy (arabic_fallback_plan_t *fallback_plan) -{ - if (!fallback_plan || fallback_plan == &arabic_fallback_plan_nil) - return; - - for (unsigned int i = 0; i < ARABIC_NUM_FALLBACK_FEATURES; i++) - if (fallback_plan->lookup_array[i]) - free (fallback_plan->lookup_array[i]); - - free (fallback_plan); -} - -static void -arabic_fallback_plan_shape (arabic_fallback_plan_t *fallback_plan, - hb_font_t *font, - hb_buffer_t *buffer) -{ - for (unsigned int i = 0; i < ARABIC_NUM_FALLBACK_FEATURES; i++) - if (fallback_plan->lookup_array[i]) { - OT::hb_apply_context_t c (font, buffer, fallback_plan->mask_array[i]); - fallback_plan->lookup_array[i]->apply_string (&c, &fallback_plan->digest_array[i]); - } -} - - -#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_FALLBACK_HH */ |