Matthias Clasen
2 years ago
committed by
Behdad Esfahbod
parent
f89fa6dcfe
commit
e25e4c9a52
4 changed files with 921 additions and 885 deletions
@ -0,0 +1,918 @@ |
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/*
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* Copyright © 2007,2008,2009 Red Hat, Inc. |
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* Copyright © 2010,2011,2012 Google, Inc. |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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* Red Hat Author(s): Behdad Esfahbod |
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* Google Author(s): Behdad Esfahbod |
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*/ |
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#ifndef OT_LAYOUT_GDEF_GDEF_HH |
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#define OT_LAYOUT_GDEF_GDEF_HH |
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#include "hb-ot-layout-common.hh" |
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#include "hb-font.hh" |
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namespace OT { |
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/*
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* Attachment List Table |
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*/ |
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/* Array of contour point indices--in increasing numerical order */ |
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struct AttachPoint : Array16Of<HBUINT16> |
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{ |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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auto *out = c->serializer->start_embed (*this); |
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if (unlikely (!out)) return_trace (false); |
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return_trace (out->serialize (c->serializer, + iter ())); |
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} |
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}; |
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struct AttachList |
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{ |
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unsigned int get_attach_points (hb_codepoint_t glyph_id, |
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unsigned int start_offset, |
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unsigned int *point_count /* IN/OUT */, |
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unsigned int *point_array /* OUT */) const |
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{ |
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unsigned int index = (this+coverage).get_coverage (glyph_id); |
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if (index == NOT_COVERED) |
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{ |
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if (point_count) |
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*point_count = 0; |
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return 0; |
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} |
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const AttachPoint &points = this+attachPoint[index]; |
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if (point_count) |
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{ |
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+ points.as_array ().sub_array (start_offset, point_count) |
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| hb_sink (hb_array (point_array, *point_count)) |
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; |
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} |
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return points.len; |
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} |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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const hb_set_t &glyphset = *c->plan->glyphset_gsub (); |
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const hb_map_t &glyph_map = *c->plan->glyph_map; |
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auto *out = c->serializer->start_embed (*this); |
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if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
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hb_sorted_vector_t<hb_codepoint_t> new_coverage; |
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+ hb_zip (this+coverage, attachPoint) |
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| hb_filter (glyphset, hb_first) |
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| hb_filter (subset_offset_array (c, out->attachPoint, this), hb_second) |
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| hb_map (hb_first) |
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| hb_map (glyph_map) |
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| hb_sink (new_coverage) |
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; |
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out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); |
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return_trace (bool (new_coverage)); |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (coverage.sanitize (c, this) && attachPoint.sanitize (c, this)); |
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} |
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protected: |
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Offset16To<Coverage> |
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coverage; /* Offset to Coverage table -- from
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* beginning of AttachList table */ |
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Array16OfOffset16To<AttachPoint> |
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attachPoint; /* Array of AttachPoint tables
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* in Coverage Index order */ |
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public: |
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DEFINE_SIZE_ARRAY (4, attachPoint); |
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}; |
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/*
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* Ligature Caret Table |
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*/ |
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struct CaretValueFormat1 |
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{ |
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friend struct CaretValue; |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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auto *out = c->serializer->embed (this); |
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if (unlikely (!out)) return_trace (false); |
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return_trace (true); |
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} |
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private: |
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hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction) const |
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{ |
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return HB_DIRECTION_IS_HORIZONTAL (direction) ? font->em_scale_x (coordinate) : font->em_scale_y (coordinate); |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (c->check_struct (this)); |
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} |
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protected: |
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HBUINT16 caretValueFormat; /* Format identifier--format = 1 */ |
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FWORD coordinate; /* X or Y value, in design units */ |
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public: |
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DEFINE_SIZE_STATIC (4); |
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}; |
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struct CaretValueFormat2 |
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{ |
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friend struct CaretValue; |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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auto *out = c->serializer->embed (this); |
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if (unlikely (!out)) return_trace (false); |
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return_trace (true); |
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} |
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private: |
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hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction, hb_codepoint_t glyph_id) const |
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{ |
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hb_position_t x, y; |
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font->get_glyph_contour_point_for_origin (glyph_id, caretValuePoint, direction, &x, &y); |
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return HB_DIRECTION_IS_HORIZONTAL (direction) ? x : y; |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (c->check_struct (this)); |
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} |
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protected: |
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HBUINT16 caretValueFormat; /* Format identifier--format = 2 */ |
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HBUINT16 caretValuePoint; /* Contour point index on glyph */ |
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public: |
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DEFINE_SIZE_STATIC (4); |
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}; |
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struct CaretValueFormat3 |
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{ |
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friend struct CaretValue; |
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hb_position_t get_caret_value (hb_font_t *font, hb_direction_t direction, |
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const VariationStore &var_store) const |
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{ |
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return HB_DIRECTION_IS_HORIZONTAL (direction) ? |
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font->em_scale_x (coordinate) + (this+deviceTable).get_x_delta (font, var_store) : |
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font->em_scale_y (coordinate) + (this+deviceTable).get_y_delta (font, var_store); |
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} |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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auto *out = c->serializer->start_embed (*this); |
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if (unlikely (!out)) return_trace (false); |
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if (!c->serializer->embed (caretValueFormat)) return_trace (false); |
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if (!c->serializer->embed (coordinate)) return_trace (false); |
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unsigned varidx = (this+deviceTable).get_variation_index (); |
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if (c->plan->layout_variation_idx_delta_map.has (varidx)) |
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{ |
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int delta = hb_second (c->plan->layout_variation_idx_delta_map.get (varidx)); |
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if (delta != 0) |
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{ |
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if (!c->serializer->check_assign (out->coordinate, coordinate + delta, HB_SERIALIZE_ERROR_INT_OVERFLOW)) |
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return_trace (false); |
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} |
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} |
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if (c->plan->all_axes_pinned) |
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return_trace (c->serializer->check_assign (out->caretValueFormat, 1, HB_SERIALIZE_ERROR_INT_OVERFLOW)); |
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if (!c->serializer->embed (deviceTable)) |
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return_trace (false); |
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return_trace (out->deviceTable.serialize_copy (c->serializer, deviceTable, this, c->serializer->to_bias (out), |
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hb_serialize_context_t::Head, &c->plan->layout_variation_idx_delta_map)); |
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} |
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void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
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{ (this+deviceTable).collect_variation_indices (c); } |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (c->check_struct (this) && deviceTable.sanitize (c, this)); |
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} |
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protected: |
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HBUINT16 caretValueFormat; /* Format identifier--format = 3 */ |
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FWORD coordinate; /* X or Y value, in design units */ |
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Offset16To<Device> |
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deviceTable; /* Offset to Device table for X or Y
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* value--from beginning of CaretValue |
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* table */ |
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public: |
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DEFINE_SIZE_STATIC (6); |
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}; |
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struct CaretValue |
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{ |
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hb_position_t get_caret_value (hb_font_t *font, |
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hb_direction_t direction, |
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hb_codepoint_t glyph_id, |
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const VariationStore &var_store) const |
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{ |
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switch (u.format) { |
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case 1: return u.format1.get_caret_value (font, direction); |
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case 2: return u.format2.get_caret_value (font, direction, glyph_id); |
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case 3: return u.format3.get_caret_value (font, direction, var_store); |
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default:return 0; |
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} |
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} |
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template <typename context_t, typename ...Ts> |
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typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const |
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{ |
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if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value (); |
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TRACE_DISPATCH (this, u.format); |
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switch (u.format) { |
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case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); |
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case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); |
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case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...)); |
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default:return_trace (c->default_return_value ()); |
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} |
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} |
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void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
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{ |
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switch (u.format) { |
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case 1: |
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case 2: |
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return; |
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case 3: |
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u.format3.collect_variation_indices (c); |
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return; |
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default: return; |
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} |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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if (!u.format.sanitize (c)) return_trace (false); |
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switch (u.format) { |
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case 1: return_trace (u.format1.sanitize (c)); |
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case 2: return_trace (u.format2.sanitize (c)); |
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case 3: return_trace (u.format3.sanitize (c)); |
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default:return_trace (true); |
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} |
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} |
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protected: |
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union { |
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HBUINT16 format; /* Format identifier */ |
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CaretValueFormat1 format1; |
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CaretValueFormat2 format2; |
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CaretValueFormat3 format3; |
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} u; |
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public: |
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DEFINE_SIZE_UNION (2, format); |
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}; |
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struct LigGlyph |
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{ |
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unsigned get_lig_carets (hb_font_t *font, |
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hb_direction_t direction, |
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hb_codepoint_t glyph_id, |
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const VariationStore &var_store, |
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unsigned start_offset, |
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unsigned *caret_count /* IN/OUT */, |
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hb_position_t *caret_array /* OUT */) const |
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{ |
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if (caret_count) |
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{ |
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+ carets.as_array ().sub_array (start_offset, caret_count) |
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| hb_map (hb_add (this)) |
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| hb_map ([&] (const CaretValue &value) { return value.get_caret_value (font, direction, glyph_id, var_store); }) |
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| hb_sink (hb_array (caret_array, *caret_count)) |
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; |
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} |
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return carets.len; |
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} |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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auto *out = c->serializer->start_embed (*this); |
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if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
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+ hb_iter (carets) |
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| hb_apply (subset_offset_array (c, out->carets, this)) |
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; |
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return_trace (bool (out->carets)); |
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} |
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void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
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{ |
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for (const Offset16To<CaretValue>& offset : carets.iter ()) |
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(this+offset).collect_variation_indices (c); |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (carets.sanitize (c, this)); |
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} |
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protected: |
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Array16OfOffset16To<CaretValue> |
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carets; /* Offset array of CaretValue tables
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* --from beginning of LigGlyph table |
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* --in increasing coordinate order */ |
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public: |
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DEFINE_SIZE_ARRAY (2, carets); |
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}; |
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struct LigCaretList |
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{ |
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unsigned int get_lig_carets (hb_font_t *font, |
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hb_direction_t direction, |
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hb_codepoint_t glyph_id, |
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const VariationStore &var_store, |
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unsigned int start_offset, |
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unsigned int *caret_count /* IN/OUT */, |
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hb_position_t *caret_array /* OUT */) const |
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{ |
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unsigned int index = (this+coverage).get_coverage (glyph_id); |
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if (index == NOT_COVERED) |
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{ |
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if (caret_count) |
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*caret_count = 0; |
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return 0; |
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} |
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const LigGlyph &lig_glyph = this+ligGlyph[index]; |
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return lig_glyph.get_lig_carets (font, direction, glyph_id, var_store, start_offset, caret_count, caret_array); |
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} |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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const hb_set_t &glyphset = *c->plan->glyphset_gsub (); |
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const hb_map_t &glyph_map = *c->plan->glyph_map; |
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auto *out = c->serializer->start_embed (*this); |
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if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
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hb_sorted_vector_t<hb_codepoint_t> new_coverage; |
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+ hb_zip (this+coverage, ligGlyph) |
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| hb_filter (glyphset, hb_first) |
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| hb_filter (subset_offset_array (c, out->ligGlyph, this), hb_second) |
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| hb_map (hb_first) |
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| hb_map (glyph_map) |
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| hb_sink (new_coverage) |
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; |
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out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); |
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return_trace (bool (new_coverage)); |
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} |
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void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
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{ |
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+ hb_zip (this+coverage, ligGlyph) |
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| hb_filter (c->glyph_set, hb_first) |
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| hb_map (hb_second) |
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| hb_map (hb_add (this)) |
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| hb_apply ([c] (const LigGlyph& _) { _.collect_variation_indices (c); }) |
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; |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (coverage.sanitize (c, this) && ligGlyph.sanitize (c, this)); |
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} |
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protected: |
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Offset16To<Coverage> |
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coverage; /* Offset to Coverage table--from
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* beginning of LigCaretList table */ |
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Array16OfOffset16To<LigGlyph> |
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ligGlyph; /* Array of LigGlyph tables
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* in Coverage Index order */ |
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public: |
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DEFINE_SIZE_ARRAY (4, ligGlyph); |
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}; |
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struct MarkGlyphSetsFormat1 |
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{ |
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bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
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{ return (this+coverage[set_index]).get_coverage (glyph_id) != NOT_COVERED; } |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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auto *out = c->serializer->start_embed (*this); |
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if (unlikely (!c->serializer->extend_min (out))) return_trace (false); |
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out->format = format; |
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bool ret = true; |
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for (const Offset32To<Coverage>& offset : coverage.iter ()) |
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{ |
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auto *o = out->coverage.serialize_append (c->serializer); |
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if (unlikely (!o)) |
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{ |
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ret = false; |
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break; |
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} |
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//not using o->serialize_subset (c, offset, this, out) here because
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//OTS doesn't allow null offset.
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//See issue: https://github.com/khaledhosny/ots/issues/172
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c->serializer->push (); |
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c->dispatch (this+offset); |
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c->serializer->add_link (*o, c->serializer->pop_pack ()); |
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} |
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return_trace (ret && out->coverage.len); |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (coverage.sanitize (c, this)); |
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} |
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protected: |
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HBUINT16 format; /* Format identifier--format = 1 */ |
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Array16Of<Offset32To<Coverage>> |
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coverage; /* Array of long offsets to mark set
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* coverage tables */ |
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public: |
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DEFINE_SIZE_ARRAY (4, coverage); |
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}; |
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struct MarkGlyphSets |
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{ |
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bool covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
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{ |
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switch (u.format) { |
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case 1: return u.format1.covers (set_index, glyph_id); |
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default:return false; |
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} |
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} |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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switch (u.format) { |
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case 1: return_trace (u.format1.subset (c)); |
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default:return_trace (false); |
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} |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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if (!u.format.sanitize (c)) return_trace (false); |
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switch (u.format) { |
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case 1: return_trace (u.format1.sanitize (c)); |
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default:return_trace (true); |
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} |
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} |
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protected: |
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union { |
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HBUINT16 format; /* Format identifier */ |
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MarkGlyphSetsFormat1 format1; |
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} u; |
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public: |
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DEFINE_SIZE_UNION (2, format); |
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}; |
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/*
|
||||
* GDEF -- Glyph Definition |
||||
* https://docs.microsoft.com/en-us/typography/opentype/spec/gdef
|
||||
*/ |
||||
|
||||
|
||||
template <typename Types> |
||||
struct GDEFVersion1_2 |
||||
{ |
||||
friend struct GDEF; |
||||
|
||||
protected: |
||||
FixedVersion<>version; /* Version of the GDEF table--currently
|
||||
* 0x00010003u */ |
||||
typename Types::template OffsetTo<ClassDef> |
||||
glyphClassDef; /* Offset to class definition table
|
||||
* for glyph type--from beginning of |
||||
* GDEF header (may be Null) */ |
||||
typename Types::template OffsetTo<AttachList> |
||||
attachList; /* Offset to list of glyphs with
|
||||
* attachment points--from beginning |
||||
* of GDEF header (may be Null) */ |
||||
typename Types::template OffsetTo<LigCaretList> |
||||
ligCaretList; /* Offset to list of positioning points
|
||||
* for ligature carets--from beginning |
||||
* of GDEF header (may be Null) */ |
||||
typename Types::template OffsetTo<ClassDef> |
||||
markAttachClassDef; /* Offset to class definition table for
|
||||
* mark attachment type--from beginning |
||||
* of GDEF header (may be Null) */ |
||||
typename Types::template OffsetTo<MarkGlyphSets> |
||||
markGlyphSetsDef; /* Offset to the table of mark set
|
||||
* definitions--from beginning of GDEF |
||||
* header (may be NULL). Introduced |
||||
* in version 0x00010002. */ |
||||
Offset32To<VariationStore> |
||||
varStore; /* Offset to the table of Item Variation
|
||||
* Store--from beginning of GDEF |
||||
* header (may be NULL). Introduced |
||||
* in version 0x00010003. */ |
||||
public: |
||||
DEFINE_SIZE_MIN (4 + 4 * Types::size); |
||||
|
||||
unsigned int get_size () const |
||||
{ |
||||
return min_size + |
||||
(version.to_int () >= 0x00010002u ? markGlyphSetsDef.static_size : 0) + |
||||
(version.to_int () >= 0x00010003u ? varStore.static_size : 0); |
||||
} |
||||
|
||||
bool sanitize (hb_sanitize_context_t *c) const |
||||
{ |
||||
TRACE_SANITIZE (this); |
||||
return_trace (version.sanitize (c) && |
||||
glyphClassDef.sanitize (c, this) && |
||||
attachList.sanitize (c, this) && |
||||
ligCaretList.sanitize (c, this) && |
||||
markAttachClassDef.sanitize (c, this) && |
||||
(version.to_int () < 0x00010002u || markGlyphSetsDef.sanitize (c, this)) && |
||||
(version.to_int () < 0x00010003u || varStore.sanitize (c, this))); |
||||
} |
||||
|
||||
bool subset (hb_subset_context_t *c) const |
||||
{ |
||||
TRACE_SUBSET (this); |
||||
auto *out = c->serializer->embed (*this); |
||||
if (unlikely (!out)) return_trace (false); |
||||
|
||||
bool subset_glyphclassdef = out->glyphClassDef.serialize_subset (c, glyphClassDef, this, nullptr, false, true); |
||||
bool subset_attachlist = out->attachList.serialize_subset (c, attachList, this); |
||||
bool subset_ligcaretlist = out->ligCaretList.serialize_subset (c, ligCaretList, this); |
||||
bool subset_markattachclassdef = out->markAttachClassDef.serialize_subset (c, markAttachClassDef, this, nullptr, false, true); |
||||
|
||||
bool subset_markglyphsetsdef = false; |
||||
if (version.to_int () >= 0x00010002u) |
||||
{ |
||||
subset_markglyphsetsdef = out->markGlyphSetsDef.serialize_subset (c, markGlyphSetsDef, this); |
||||
} |
||||
|
||||
bool subset_varstore = false; |
||||
if (version.to_int () >= 0x00010003u) |
||||
{ |
||||
if (c->plan->all_axes_pinned) |
||||
out->varStore = 0; |
||||
else |
||||
subset_varstore = out->varStore.serialize_subset (c, varStore, this, c->plan->gdef_varstore_inner_maps.as_array ()); |
||||
} |
||||
|
||||
if (subset_varstore) |
||||
{ |
||||
out->version.minor = 3; |
||||
} else if (subset_markglyphsetsdef) { |
||||
out->version.minor = 2; |
||||
} else { |
||||
out->version.minor = 0; |
||||
} |
||||
|
||||
return_trace (subset_glyphclassdef || subset_attachlist || |
||||
subset_ligcaretlist || subset_markattachclassdef || |
||||
(out->version.to_int () >= 0x00010002u && subset_markglyphsetsdef) || |
||||
(out->version.to_int () >= 0x00010003u && subset_varstore)); |
||||
} |
||||
}; |
||||
|
||||
struct GDEF |
||||
{ |
||||
static constexpr hb_tag_t tableTag = HB_OT_TAG_GDEF; |
||||
|
||||
enum GlyphClasses { |
||||
UnclassifiedGlyph = 0, |
||||
BaseGlyph = 1, |
||||
LigatureGlyph = 2, |
||||
MarkGlyph = 3, |
||||
ComponentGlyph = 4 |
||||
}; |
||||
|
||||
unsigned int get_size () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version1.get_size (); |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return u.version2.get_size (); |
||||
#endif |
||||
default: return u.version.static_size; |
||||
} |
||||
} |
||||
|
||||
bool sanitize (hb_sanitize_context_t *c) const |
||||
{ |
||||
TRACE_SANITIZE (this); |
||||
if (unlikely (!u.version.sanitize (c))) return_trace (false); |
||||
switch (u.version.major) { |
||||
case 1: return_trace (u.version1.sanitize (c)); |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return_trace (u.version2.sanitize (c)); |
||||
#endif |
||||
default: return_trace (true); |
||||
} |
||||
} |
||||
|
||||
bool subset (hb_subset_context_t *c) const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version1.subset (c); |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return u.version2.subset (c); |
||||
#endif |
||||
default: return false; |
||||
} |
||||
} |
||||
|
||||
bool has_glyph_classes () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version1.glyphClassDef != 0; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return u.version2.glyphClassDef != 0; |
||||
#endif |
||||
default: return false; |
||||
} |
||||
} |
||||
const ClassDef &get_glyph_class_def () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return this+u.version1.glyphClassDef; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return this+u.version2.glyphClassDef; |
||||
#endif |
||||
default: return Null(ClassDef); |
||||
} |
||||
} |
||||
bool has_attach_list () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version1.attachList != 0; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return u.version2.attachList != 0; |
||||
#endif |
||||
default: return false; |
||||
} |
||||
} |
||||
const AttachList &get_attach_list () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return this+u.version1.attachList; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return this+u.version2.attachList; |
||||
#endif |
||||
default: return Null(AttachList); |
||||
} |
||||
} |
||||
bool has_lig_carets () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version1.ligCaretList != 0; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return u.version2.ligCaretList != 0; |
||||
#endif |
||||
default: return false; |
||||
} |
||||
} |
||||
const LigCaretList &get_lig_caret_list () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return this+u.version1.ligCaretList; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return this+u.version2.ligCaretList; |
||||
#endif |
||||
default: return Null(LigCaretList); |
||||
} |
||||
} |
||||
bool has_mark_attachment_types () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version1.markAttachClassDef != 0; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return u.version2.markAttachClassDef != 0; |
||||
#endif |
||||
default: return false; |
||||
} |
||||
} |
||||
const ClassDef &get_mark_attach_class_def () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return this+u.version1.markAttachClassDef; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return this+u.version2.markAttachClassDef; |
||||
#endif |
||||
default: return Null(ClassDef); |
||||
} |
||||
} |
||||
bool has_mark_glyph_sets () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version.to_int () >= 0x00010002u && u.version1.markGlyphSetsDef != 0; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return u.version2.markGlyphSetsDef != 0; |
||||
#endif |
||||
default: return false; |
||||
} |
||||
} |
||||
const MarkGlyphSets &get_mark_glyph_sets () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version.to_int () >= 0x00010002u ? this+u.version1.markGlyphSetsDef : Null(MarkGlyphSets); |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return this+u.version2.markGlyphSetsDef; |
||||
#endif |
||||
default: return Null(MarkGlyphSets); |
||||
} |
||||
} |
||||
bool has_var_store () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version.to_int () >= 0x00010003u && u.version1.varStore != 0; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return u.version2.varStore != 0; |
||||
#endif |
||||
default: return false; |
||||
} |
||||
} |
||||
const VariationStore &get_var_store () const |
||||
{ |
||||
switch (u.version.major) { |
||||
case 1: return u.version.to_int () >= 0x00010003u ? this+u.version1.varStore : Null(VariationStore); |
||||
#ifndef HB_NO_BEYOND_64K |
||||
case 2: return this+u.version2.varStore; |
||||
#endif |
||||
default: return Null(VariationStore); |
||||
} |
||||
} |
||||
|
||||
|
||||
bool has_data () const { return u.version.to_int (); } |
||||
unsigned int get_glyph_class (hb_codepoint_t glyph) const |
||||
{ return get_glyph_class_def ().get_class (glyph); } |
||||
void get_glyphs_in_class (unsigned int klass, hb_set_t *glyphs) const |
||||
{ get_glyph_class_def ().collect_class (glyphs, klass); } |
||||
|
||||
unsigned int get_mark_attachment_type (hb_codepoint_t glyph) const |
||||
{ return get_mark_attach_class_def ().get_class (glyph); } |
||||
|
||||
unsigned int get_attach_points (hb_codepoint_t glyph_id, |
||||
unsigned int start_offset, |
||||
unsigned int *point_count /* IN/OUT */, |
||||
unsigned int *point_array /* OUT */) const |
||||
{ return get_attach_list ().get_attach_points (glyph_id, start_offset, point_count, point_array); } |
||||
|
||||
unsigned int get_lig_carets (hb_font_t *font, |
||||
hb_direction_t direction, |
||||
hb_codepoint_t glyph_id, |
||||
unsigned int start_offset, |
||||
unsigned int *caret_count /* IN/OUT */, |
||||
hb_position_t *caret_array /* OUT */) const |
||||
{ return get_lig_caret_list ().get_lig_carets (font, |
||||
direction, glyph_id, get_var_store(), |
||||
start_offset, caret_count, caret_array); } |
||||
|
||||
bool mark_set_covers (unsigned int set_index, hb_codepoint_t glyph_id) const |
||||
{ return get_mark_glyph_sets ().covers (set_index, glyph_id); } |
||||
|
||||
/* glyph_props is a 16-bit integer where the lower 8-bit have bits representing
|
||||
* glyph class and other bits, and high 8-bit the mark attachment type (if any). |
||||
* Not to be confused with lookup_props which is very similar. */ |
||||
unsigned int get_glyph_props (hb_codepoint_t glyph) const |
||||
{ |
||||
unsigned int klass = get_glyph_class (glyph); |
||||
|
||||
static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH == (unsigned int) LookupFlag::IgnoreBaseGlyphs), ""); |
||||
static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE == (unsigned int) LookupFlag::IgnoreLigatures), ""); |
||||
static_assert (((unsigned int) HB_OT_LAYOUT_GLYPH_PROPS_MARK == (unsigned int) LookupFlag::IgnoreMarks), ""); |
||||
|
||||
switch (klass) { |
||||
default: return HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED; |
||||
case BaseGlyph: return HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH; |
||||
case LigatureGlyph: return HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE; |
||||
case MarkGlyph: |
||||
klass = get_mark_attachment_type (glyph); |
||||
return HB_OT_LAYOUT_GLYPH_PROPS_MARK | (klass << 8); |
||||
} |
||||
} |
||||
|
||||
HB_INTERNAL bool is_blocklisted (hb_blob_t *blob, |
||||
hb_face_t *face) const; |
||||
|
||||
struct accelerator_t |
||||
{ |
||||
accelerator_t (hb_face_t *face) |
||||
{ |
||||
table = hb_sanitize_context_t ().reference_table<GDEF> (face); |
||||
if (unlikely (table->is_blocklisted (table.get_blob (), face))) |
||||
{ |
||||
hb_blob_destroy (table.get_blob ()); |
||||
table = hb_blob_get_empty (); |
||||
} |
||||
} |
||||
~accelerator_t () { table.destroy (); } |
||||
|
||||
hb_blob_ptr_t<GDEF> table; |
||||
}; |
||||
|
||||
void collect_variation_indices (hb_collect_variation_indices_context_t *c) const |
||||
{ get_lig_caret_list ().collect_variation_indices (c); } |
||||
|
||||
void remap_layout_variation_indices (const hb_set_t *layout_variation_indices, |
||||
hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map /* OUT */) const |
||||
{ |
||||
if (!has_var_store ()) return; |
||||
if (layout_variation_indices->is_empty ()) return; |
||||
|
||||
unsigned new_major = 0, new_minor = 0; |
||||
unsigned last_major = (layout_variation_indices->get_min ()) >> 16; |
||||
for (unsigned idx : layout_variation_indices->iter ()) |
||||
{ |
||||
uint16_t major = idx >> 16; |
||||
if (major >= get_var_store ().get_sub_table_count ()) break; |
||||
if (major != last_major) |
||||
{ |
||||
new_minor = 0; |
||||
++new_major; |
||||
} |
||||
|
||||
unsigned new_idx = (new_major << 16) + new_minor; |
||||
if (!layout_variation_idx_delta_map->has (idx)) |
||||
continue; |
||||
int delta = hb_second (layout_variation_idx_delta_map->get (idx)); |
||||
|
||||
layout_variation_idx_delta_map->set (idx, hb_pair_t<unsigned, int> (new_idx, delta)); |
||||
++new_minor; |
||||
last_major = major; |
||||
} |
||||
} |
||||
|
||||
protected: |
||||
union { |
||||
FixedVersion<> version; /* Version identifier */ |
||||
GDEFVersion1_2<SmallTypes> version1; |
||||
#ifndef HB_NO_BEYOND_64K |
||||
GDEFVersion1_2<MediumTypes> version2; |
||||
#endif |
||||
} u; |
||||
public: |
||||
DEFINE_SIZE_MIN (4); |
||||
}; |
||||
|
||||
struct GDEF_accelerator_t : GDEF::accelerator_t { |
||||
GDEF_accelerator_t (hb_face_t *face) : GDEF::accelerator_t (face) {} |
||||
}; |
||||
|
||||
} /* namespace OT */ |
||||
|
||||
|
||||
#endif /* OT_LAYOUT_GDEF_GDEF_HH */ |
||||
Loading…
Reference in new issue