diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-ot-shape-fallback.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-ot-shape-fallback.cc | 409 |
1 files changed, 0 insertions, 409 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-ot-shape-fallback.cc b/Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-ot-shape-fallback.cc deleted file mode 100644 index f4463e4eeca..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-0.9.8/src/hb-ot-shape-fallback.cc +++ /dev/null @@ -1,409 +0,0 @@ -/* - * Copyright © 2011,2012 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 - */ - -#include "hb-ot-shape-fallback-private.hh" - -static unsigned int -recategorize_combining_class (hb_codepoint_t u, - unsigned int klass) -{ - if (klass >= 200) - return klass; - - /* Thai / Lao need some per-character work. */ - if ((u & ~0xFF) == 0x0E00) - { - if (unlikely (klass == 0)) - { - switch (u) - { - case 0x0E31: - case 0x0E34: - case 0x0E35: - case 0x0E36: - case 0x0E37: - case 0x0E47: - case 0x0E4C: - case 0x0E4D: - case 0x0E4E: - klass = HB_UNICODE_COMBINING_CLASS_ABOVE_RIGHT; - break; - - case 0x0EB1: - case 0x0EB4: - case 0x0EB5: - case 0x0EB6: - case 0x0EB7: - case 0x0EBB: - case 0x0ECC: - case 0x0ECD: - klass = HB_UNICODE_COMBINING_CLASS_ABOVE; - break; - - case 0x0EBC: - klass = HB_UNICODE_COMBINING_CLASS_BELOW; - break; - } - } else { - /* Thai virama is below-right */ - if (u == 0x0E3A) - klass = HB_UNICODE_COMBINING_CLASS_BELOW_RIGHT; - } - } - - switch (klass) - { - - /* Hebrew */ - - case HB_MODIFIED_COMBINING_CLASS_CCC10: /* sheva */ - case HB_MODIFIED_COMBINING_CLASS_CCC11: /* hataf segol */ - case HB_MODIFIED_COMBINING_CLASS_CCC12: /* hataf patah */ - case HB_MODIFIED_COMBINING_CLASS_CCC13: /* hataf qamats */ - case HB_MODIFIED_COMBINING_CLASS_CCC14: /* hiriq */ - case HB_MODIFIED_COMBINING_CLASS_CCC15: /* tsere */ - case HB_MODIFIED_COMBINING_CLASS_CCC16: /* segol */ - case HB_MODIFIED_COMBINING_CLASS_CCC17: /* patah */ - case HB_MODIFIED_COMBINING_CLASS_CCC18: /* qamats */ - case HB_MODIFIED_COMBINING_CLASS_CCC20: /* qubuts */ - case HB_MODIFIED_COMBINING_CLASS_CCC22: /* meteg */ - return HB_UNICODE_COMBINING_CLASS_BELOW; - - case HB_MODIFIED_COMBINING_CLASS_CCC23: /* rafe */ - return HB_UNICODE_COMBINING_CLASS_ATTACHED_ABOVE; - - case HB_MODIFIED_COMBINING_CLASS_CCC24: /* shin dot */ - return HB_UNICODE_COMBINING_CLASS_ABOVE_RIGHT; - - case HB_MODIFIED_COMBINING_CLASS_CCC25: /* sin dot */ - case HB_MODIFIED_COMBINING_CLASS_CCC19: /* holam */ - return HB_UNICODE_COMBINING_CLASS_ABOVE_LEFT; - - case HB_MODIFIED_COMBINING_CLASS_CCC26: /* point varika */ - return HB_UNICODE_COMBINING_CLASS_ABOVE; - - case HB_MODIFIED_COMBINING_CLASS_CCC21: /* dagesh */ - break; - - - /* Arabic and Syriac */ - - case HB_MODIFIED_COMBINING_CLASS_CCC27: /* fathatan */ - case HB_MODIFIED_COMBINING_CLASS_CCC28: /* dammatan */ - case HB_MODIFIED_COMBINING_CLASS_CCC30: /* fatha */ - case HB_MODIFIED_COMBINING_CLASS_CCC31: /* damma */ - case HB_MODIFIED_COMBINING_CLASS_CCC33: /* shadda */ - case HB_MODIFIED_COMBINING_CLASS_CCC34: /* sukun */ - case HB_MODIFIED_COMBINING_CLASS_CCC35: /* superscript alef */ - case HB_MODIFIED_COMBINING_CLASS_CCC36: /* superscript alaph */ - return HB_UNICODE_COMBINING_CLASS_ABOVE; - - case HB_MODIFIED_COMBINING_CLASS_CCC29: /* kasratan */ - case HB_MODIFIED_COMBINING_CLASS_CCC32: /* kasra */ - return HB_UNICODE_COMBINING_CLASS_BELOW; - - - /* Thai */ - - case HB_MODIFIED_COMBINING_CLASS_CCC103: /* sara u / sara uu */ - return HB_UNICODE_COMBINING_CLASS_BELOW_RIGHT; - - case HB_MODIFIED_COMBINING_CLASS_CCC107: /* mai */ - return HB_UNICODE_COMBINING_CLASS_ABOVE_RIGHT; - - - /* Lao */ - - case HB_MODIFIED_COMBINING_CLASS_CCC118: /* sign u / sign uu */ - return HB_UNICODE_COMBINING_CLASS_BELOW; - - case HB_MODIFIED_COMBINING_CLASS_CCC122: /* mai */ - return HB_UNICODE_COMBINING_CLASS_ABOVE; - - - /* Tibetan */ - - case HB_MODIFIED_COMBINING_CLASS_CCC129: /* sign aa */ - return HB_UNICODE_COMBINING_CLASS_BELOW; - - case HB_MODIFIED_COMBINING_CLASS_CCC130: /* sign i*/ - return HB_UNICODE_COMBINING_CLASS_ABOVE; - - case HB_MODIFIED_COMBINING_CLASS_CCC132: /* sign u */ - return HB_UNICODE_COMBINING_CLASS_BELOW; - - } - - return klass; -} - -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, - hb_buffer_t *buffer, - hb_glyph_extents_t &base_extents, - unsigned int i, - unsigned int combining_class) -{ - hb_glyph_extents_t mark_extents; - if (!font->get_glyph_extents (buffer->info[i].codepoint, - &mark_extents)) - return; - - hb_position_t y_gap = font->y_scale / 16; - - hb_glyph_position_t &pos = buffer->pos[i]; - pos.x_offset = pos.y_offset = 0; - - - /* We dont position LEFT and RIGHT marks. */ - - /* X positioning */ - switch (combining_class) - { - case HB_UNICODE_COMBINING_CLASS_DOUBLE_BELOW: - case HB_UNICODE_COMBINING_CLASS_DOUBLE_ABOVE: - if (buffer->props.direction == HB_DIRECTION_LTR) { - pos.x_offset += base_extents.x_bearing - mark_extents.width / 2 - mark_extents.x_bearing; - break; - } else if (buffer->props.direction == HB_DIRECTION_RTL) { - pos.x_offset += base_extents.x_bearing + base_extents.width - mark_extents.width / 2 - mark_extents.x_bearing; - break; - } - /* Fall through */ - - default: - case HB_UNICODE_COMBINING_CLASS_ATTACHED_BELOW: - case HB_UNICODE_COMBINING_CLASS_ATTACHED_ABOVE: - case HB_UNICODE_COMBINING_CLASS_BELOW: - case HB_UNICODE_COMBINING_CLASS_ABOVE: - /* Center align. */ - pos.x_offset += base_extents.x_bearing + (base_extents.width - mark_extents.width) / 2 - mark_extents.x_bearing; - break; - - case HB_UNICODE_COMBINING_CLASS_ATTACHED_BELOW_LEFT: - case HB_UNICODE_COMBINING_CLASS_BELOW_LEFT: - case HB_UNICODE_COMBINING_CLASS_ABOVE_LEFT: - /* Left align. */ - pos.x_offset += base_extents.x_bearing - mark_extents.x_bearing; - break; - - case HB_UNICODE_COMBINING_CLASS_ATTACHED_ABOVE_RIGHT: - case HB_UNICODE_COMBINING_CLASS_BELOW_RIGHT: - case HB_UNICODE_COMBINING_CLASS_ABOVE_RIGHT: - /* Right align. */ - pos.x_offset += base_extents.x_bearing + base_extents.width - mark_extents.width - mark_extents.x_bearing; - break; - } - - /* Y positioning */ - switch (combining_class) - { - case HB_UNICODE_COMBINING_CLASS_DOUBLE_BELOW: - case HB_UNICODE_COMBINING_CLASS_BELOW_LEFT: - case HB_UNICODE_COMBINING_CLASS_BELOW: - case HB_UNICODE_COMBINING_CLASS_BELOW_RIGHT: - /* Add gap, fall-through. */ - base_extents.height -= y_gap; - - case HB_UNICODE_COMBINING_CLASS_ATTACHED_BELOW_LEFT: - case HB_UNICODE_COMBINING_CLASS_ATTACHED_BELOW: - pos.y_offset += base_extents.y_bearing + base_extents.height - mark_extents.y_bearing; - base_extents.height += mark_extents.height; - break; - - case HB_UNICODE_COMBINING_CLASS_DOUBLE_ABOVE: - case HB_UNICODE_COMBINING_CLASS_ABOVE_LEFT: - case HB_UNICODE_COMBINING_CLASS_ABOVE: - case HB_UNICODE_COMBINING_CLASS_ABOVE_RIGHT: - /* Add gap, fall-through. */ - base_extents.y_bearing += y_gap; - base_extents.height -= y_gap; - - case HB_UNICODE_COMBINING_CLASS_ATTACHED_ABOVE: - case HB_UNICODE_COMBINING_CLASS_ATTACHED_ABOVE_RIGHT: - pos.y_offset += base_extents.y_bearing - (mark_extents.y_bearing + mark_extents.height); - base_extents.y_bearing -= mark_extents.height; - base_extents.height += mark_extents.height; - break; - } -} - -static inline void -position_around_base (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer, - unsigned int base, - unsigned int end) -{ - hb_direction_t horiz_dir = HB_DIRECTION_INVALID; - hb_glyph_extents_t base_extents; - if (!font->get_glyph_extents (buffer->info[base].codepoint, - &base_extents)) - { - /* If extents don't work, zero marks and go home. */ - zero_mark_advances (buffer, base + 1, end); - return; - } - base_extents.x_bearing += buffer->pos[base].x_offset; - base_extents.y_bearing += buffer->pos[base].y_offset; - - unsigned int lig_id = get_lig_id (buffer->info[base]); - unsigned int num_lig_components = get_lig_num_comps (buffer->info[base]); - - hb_position_t x_offset = 0, y_offset = 0; - if (HB_DIRECTION_IS_FORWARD (buffer->props.direction)) { - x_offset -= buffer->pos[base].x_advance; - y_offset -= buffer->pos[base].y_advance; - } - - hb_glyph_extents_t component_extents = base_extents; - unsigned int last_lig_component = (unsigned int) -1; - unsigned int last_combining_class = 255; - hb_glyph_extents_t cluster_extents = base_extents; /* Initialization is just to shut gcc up. */ - for (unsigned int i = base + 1; i < end; i++) - if (_hb_glyph_info_get_modified_combining_class (&buffer->info[i])) - { - if (num_lig_components > 1) { - unsigned int this_lig_id = get_lig_id (buffer->info[i]); - unsigned int this_lig_component = get_lig_comp (buffer->info[i]) - 1; - /* Conditions for attaching to the last component. */ - if (!lig_id || lig_id != this_lig_id || this_lig_component >= num_lig_components) - this_lig_component = num_lig_components - 1; - if (last_lig_component != this_lig_component) - { - last_lig_component = this_lig_component; - last_combining_class = 255; - component_extents = base_extents; - if (unlikely (horiz_dir == HB_DIRECTION_INVALID)) { - if (HB_DIRECTION_IS_HORIZONTAL (plan->props.direction)) - horiz_dir = plan->props.direction; - else - horiz_dir = hb_script_get_horizontal_direction (plan->props.script); - } - if (horiz_dir == HB_DIRECTION_LTR) - component_extents.x_bearing += (this_lig_component * component_extents.width) / num_lig_components; - else - component_extents.x_bearing += ((num_lig_components - 1 - this_lig_component) * component_extents.width) / num_lig_components; - component_extents.width /= num_lig_components; - } - } - - unsigned int this_combining_class = _hb_glyph_info_get_modified_combining_class (&buffer->info[i]); - if (last_combining_class != this_combining_class) - { - last_combining_class = this_combining_class; - cluster_extents = component_extents; - } - - position_mark (plan, font, buffer, cluster_extents, i, this_combining_class); - - buffer->pos[i].x_advance = 0; - buffer->pos[i].y_advance = 0; - buffer->pos[i].x_offset += x_offset; - buffer->pos[i].y_offset += y_offset; - - } else { - if (HB_DIRECTION_IS_FORWARD (buffer->props.direction)) { - x_offset -= buffer->pos[i].x_advance; - y_offset -= buffer->pos[i].y_advance; - } else { - x_offset += buffer->pos[i].x_advance; - y_offset += buffer->pos[i].y_advance; - } - } -} - -static inline void -position_cluster (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer, - unsigned int start, - unsigned int end) -{ - if (end - start < 2) - return; - - /* Find the base glyph */ - for (unsigned int i = start; i < end; i++) - if (!HB_UNICODE_GENERAL_CATEGORY_IS_MARK (_hb_glyph_info_get_general_category (&buffer->info[i]))) - { - /* Find mark glyphs */ - unsigned int j; - for (j = i + 1; j < end; j++) - if (!HB_UNICODE_GENERAL_CATEGORY_IS_MARK (_hb_glyph_info_get_general_category (&buffer->info[j]))) - break; - - position_around_base (plan, font, buffer, i, j); - - i = j - 1; - } -} - -void -_hb_ot_shape_fallback_position (const hb_ot_shape_plan_t *plan, - hb_font_t *font, - hb_buffer_t *buffer) -{ - unsigned int start = 0; - unsigned int last_cluster = buffer->info[0].cluster; - unsigned int count = buffer->len; - for (unsigned int i = 1; i < count; i++) - if (buffer->info[i].cluster != last_cluster) { - position_cluster (plan, font, buffer, start, i); - start = i; - last_cluster = buffer->info[i].cluster; - } - position_cluster (plan, font, buffer, start, count); -} |