diff options
Diffstat (limited to 'gfx/harfbuzz/src/OT')
71 files changed, 9556 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/OT/Layout/Common/Coverage.hh b/gfx/harfbuzz/src/OT/Layout/Common/Coverage.hh new file mode 100644 index 0000000000..fbd7c642ab --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/Common/Coverage.hh @@ -0,0 +1,336 @@ +/* + * Copyright © 2007,2008,2009 Red Hat, Inc. + * Copyright © 2010,2012 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. + * + * Red Hat Author(s): Behdad Esfahbod + * Google Author(s): Behdad Esfahbod, Garret Rieger + */ + +#ifndef OT_LAYOUT_COMMON_COVERAGE_HH +#define OT_LAYOUT_COMMON_COVERAGE_HH + +#include "../types.hh" +#include "CoverageFormat1.hh" +#include "CoverageFormat2.hh" + +namespace OT { +namespace Layout { +namespace Common { + +template<typename Iterator> +static inline void Coverage_serialize (hb_serialize_context_t *c, + Iterator it); + +struct Coverage +{ + + protected: + union { + HBUINT16 format; /* Format identifier */ + CoverageFormat1_3<SmallTypes> format1; + CoverageFormat2_4<SmallTypes> format2; +#ifndef HB_NO_BEYOND_64K + CoverageFormat1_3<MediumTypes>format3; + CoverageFormat2_4<MediumTypes>format4; +#endif + } u; + public: + DEFINE_SIZE_UNION (2, format); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (!u.format.sanitize (c)) return_trace (false); + switch (u.format) + { + case 1: return_trace (u.format1.sanitize (c)); + case 2: return_trace (u.format2.sanitize (c)); +#ifndef HB_NO_BEYOND_64K + case 3: return_trace (u.format3.sanitize (c)); + case 4: return_trace (u.format4.sanitize (c)); +#endif + default:return_trace (true); + } + } + + /* Has interface. */ + unsigned operator [] (hb_codepoint_t k) const { return get (k); } + bool has (hb_codepoint_t k) const { return (*this)[k] != NOT_COVERED; } + /* Predicate. */ + bool operator () (hb_codepoint_t k) const { return has (k); } + + unsigned int get (hb_codepoint_t k) const { return get_coverage (k); } + unsigned int get_coverage (hb_codepoint_t glyph_id) const + { + switch (u.format) { + case 1: return u.format1.get_coverage (glyph_id); + case 2: return u.format2.get_coverage (glyph_id); +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3.get_coverage (glyph_id); + case 4: return u.format4.get_coverage (glyph_id); +#endif + default:return NOT_COVERED; + } + } + + unsigned get_population () const + { + switch (u.format) { + case 1: return u.format1.get_population (); + case 2: return u.format2.get_population (); +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3.get_population (); + case 4: return u.format4.get_population (); +#endif + default:return NOT_COVERED; + } + } + + template <typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, Iterator glyphs) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + + unsigned count = 0; + unsigned num_ranges = 0; + hb_codepoint_t last = (hb_codepoint_t) -2; + for (auto g: glyphs) + { + if (last + 1 != g) + num_ranges++; + last = g; + count++; + } + u.format = count <= num_ranges * 3 ? 1 : 2; + +#ifndef HB_NO_BEYOND_64K + if (count && last > 0xFFFFu) + u.format += 2; +#endif + + switch (u.format) + { + case 1: return_trace (u.format1.serialize (c, glyphs)); + case 2: return_trace (u.format2.serialize (c, glyphs)); +#ifndef HB_NO_BEYOND_64K + case 3: return_trace (u.format3.serialize (c, glyphs)); + case 4: return_trace (u.format4.serialize (c, glyphs)); +#endif + default:return_trace (false); + } + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto it = + + iter () + | hb_filter (c->plan->glyph_map_gsub) + | hb_map_retains_sorting (c->plan->glyph_map_gsub) + ; + + // Cache the iterator result as it will be iterated multiple times + // by the serialize code below. + hb_sorted_vector_t<hb_codepoint_t> glyphs (it); + Coverage_serialize (c->serializer, glyphs.iter ()); + return_trace (bool (glyphs)); + } + + bool intersects (const hb_set_t *glyphs) const + { + switch (u.format) + { + case 1: return u.format1.intersects (glyphs); + case 2: return u.format2.intersects (glyphs); +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3.intersects (glyphs); + case 4: return u.format4.intersects (glyphs); +#endif + default:return false; + } + } + bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const + { + switch (u.format) + { + case 1: return u.format1.intersects_coverage (glyphs, index); + case 2: return u.format2.intersects_coverage (glyphs, index); +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3.intersects_coverage (glyphs, index); + case 4: return u.format4.intersects_coverage (glyphs, index); +#endif + default:return false; + } + } + + /* Might return false if array looks unsorted. + * Used for faster rejection of corrupt data. */ + template <typename set_t> + bool collect_coverage (set_t *glyphs) const + { + switch (u.format) + { + case 1: return u.format1.collect_coverage (glyphs); + case 2: return u.format2.collect_coverage (glyphs); +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3.collect_coverage (glyphs); + case 4: return u.format4.collect_coverage (glyphs); +#endif + default:return false; + } + } + + template <typename IterableOut, + hb_requires (hb_is_sink_of (IterableOut, hb_codepoint_t))> + void intersect_set (const hb_set_t &glyphs, IterableOut&& intersect_glyphs) const + { + switch (u.format) + { + case 1: return u.format1.intersect_set (glyphs, intersect_glyphs); + case 2: return u.format2.intersect_set (glyphs, intersect_glyphs); +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3.intersect_set (glyphs, intersect_glyphs); + case 4: return u.format4.intersect_set (glyphs, intersect_glyphs); +#endif + default:return ; + } + } + + struct iter_t : hb_iter_with_fallback_t<iter_t, hb_codepoint_t> + { + static constexpr bool is_sorted_iterator = true; + iter_t (const Coverage &c_ = Null (Coverage)) + { + hb_memset (this, 0, sizeof (*this)); + format = c_.u.format; + switch (format) + { + case 1: u.format1.init (c_.u.format1); return; + case 2: u.format2.init (c_.u.format2); return; +#ifndef HB_NO_BEYOND_64K + case 3: u.format3.init (c_.u.format3); return; + case 4: u.format4.init (c_.u.format4); return; +#endif + default: return; + } + } + bool __more__ () const + { + switch (format) + { + case 1: return u.format1.__more__ (); + case 2: return u.format2.__more__ (); +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3.__more__ (); + case 4: return u.format4.__more__ (); +#endif + default:return false; + } + } + void __next__ () + { + switch (format) + { + case 1: u.format1.__next__ (); break; + case 2: u.format2.__next__ (); break; +#ifndef HB_NO_BEYOND_64K + case 3: u.format3.__next__ (); break; + case 4: u.format4.__next__ (); break; +#endif + default: break; + } + } + typedef hb_codepoint_t __item_t__; + __item_t__ __item__ () const { return get_glyph (); } + + hb_codepoint_t get_glyph () const + { + switch (format) + { + case 1: return u.format1.get_glyph (); + case 2: return u.format2.get_glyph (); +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3.get_glyph (); + case 4: return u.format4.get_glyph (); +#endif + default:return 0; + } + } + bool operator != (const iter_t& o) const + { + if (unlikely (format != o.format)) return true; + switch (format) + { + case 1: return u.format1 != o.u.format1; + case 2: return u.format2 != o.u.format2; +#ifndef HB_NO_BEYOND_64K + case 3: return u.format3 != o.u.format3; + case 4: return u.format4 != o.u.format4; +#endif + default:return false; + } + } + iter_t __end__ () const + { + iter_t it = {}; + it.format = format; + switch (format) + { + case 1: it.u.format1 = u.format1.__end__ (); break; + case 2: it.u.format2 = u.format2.__end__ (); break; +#ifndef HB_NO_BEYOND_64K + case 3: it.u.format3 = u.format3.__end__ (); break; + case 4: it.u.format4 = u.format4.__end__ (); break; +#endif + default: break; + } + return it; + } + + private: + unsigned int format; + union { +#ifndef HB_NO_BEYOND_64K + CoverageFormat2_4<MediumTypes>::iter_t format4; /* Put this one first since it's larger; helps shut up compiler. */ + CoverageFormat1_3<MediumTypes>::iter_t format3; +#endif + CoverageFormat2_4<SmallTypes>::iter_t format2; /* Put this one first since it's larger; helps shut up compiler. */ + CoverageFormat1_3<SmallTypes>::iter_t format1; + } u; + }; + iter_t iter () const { return iter_t (*this); } +}; + +template<typename Iterator> +static inline void +Coverage_serialize (hb_serialize_context_t *c, + Iterator it) +{ c->start_embed<Coverage> ()->serialize (c, it); } + +} +} +} + +#endif // #ifndef OT_LAYOUT_COMMON_COVERAGE_HH diff --git a/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat1.hh b/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat1.hh new file mode 100644 index 0000000000..5d68e3d15e --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat1.hh @@ -0,0 +1,133 @@ +/* + * Copyright © 2007,2008,2009 Red Hat, Inc. + * Copyright © 2010,2012 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. + * + * Red Hat Author(s): Behdad Esfahbod + * Google Author(s): Behdad Esfahbod, Garret Rieger + */ + + +#ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH +#define OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH + +namespace OT { +namespace Layout { +namespace Common { + +#define NOT_COVERED ((unsigned int) -1) + +template <typename Types> +struct CoverageFormat1_3 +{ + friend struct Coverage; + + protected: + HBUINT16 coverageFormat; /* Format identifier--format = 1 */ + SortedArray16Of<typename Types::HBGlyphID> + glyphArray; /* Array of GlyphIDs--in numerical order */ + public: + DEFINE_SIZE_ARRAY (4, glyphArray); + + private: + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (glyphArray.sanitize (c)); + } + + unsigned int get_coverage (hb_codepoint_t glyph_id) const + { + unsigned int i; + glyphArray.bfind (glyph_id, &i, HB_NOT_FOUND_STORE, NOT_COVERED); + return i; + } + + unsigned get_population () const + { + return glyphArray.len; + } + + template <typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, Iterator glyphs) + { + TRACE_SERIALIZE (this); + return_trace (glyphArray.serialize (c, glyphs)); + } + + bool intersects (const hb_set_t *glyphs) const + { + if (glyphArray.len > glyphs->get_population () * hb_bit_storage ((unsigned) glyphArray.len) / 2) + { + for (hb_codepoint_t g = HB_SET_VALUE_INVALID; glyphs->next (&g);) + if (get_coverage (g) != NOT_COVERED) + return true; + return false; + } + + for (const auto& g : glyphArray.as_array ()) + if (glyphs->has (g)) + return true; + return false; + } + bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const + { return glyphs->has (glyphArray[index]); } + + template <typename IterableOut, + hb_requires (hb_is_sink_of (IterableOut, hb_codepoint_t))> + void intersect_set (const hb_set_t &glyphs, IterableOut&& intersect_glyphs) const + { + unsigned count = glyphArray.len; + for (unsigned i = 0; i < count; i++) + if (glyphs.has (glyphArray[i])) + intersect_glyphs << glyphArray[i]; + } + + template <typename set_t> + bool collect_coverage (set_t *glyphs) const + { return glyphs->add_sorted_array (glyphArray.as_array ()); } + + public: + /* Older compilers need this to be public. */ + struct iter_t + { + void init (const struct CoverageFormat1_3 &c_) { c = &c_; i = 0; } + bool __more__ () const { return i < c->glyphArray.len; } + void __next__ () { i++; } + hb_codepoint_t get_glyph () const { return c->glyphArray[i]; } + bool operator != (const iter_t& o) const + { return i != o.i; } + iter_t __end__ () const { iter_t it; it.init (*c); it.i = c->glyphArray.len; return it; } + + private: + const struct CoverageFormat1_3 *c; + unsigned int i; + }; + private: +}; + +} +} +} + +#endif // #ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT1_HH diff --git a/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh b/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh new file mode 100644 index 0000000000..d7fcc35202 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh @@ -0,0 +1,232 @@ +/* + * Copyright © 2007,2008,2009 Red Hat, Inc. + * Copyright © 2010,2012 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. + * + * Red Hat Author(s): Behdad Esfahbod + * Google Author(s): Behdad Esfahbod, Garret Rieger + */ + +#ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT2_HH +#define OT_LAYOUT_COMMON_COVERAGEFORMAT2_HH + +#include "RangeRecord.hh" + +namespace OT { +namespace Layout { +namespace Common { + +template <typename Types> +struct CoverageFormat2_4 +{ + friend struct Coverage; + + protected: + HBUINT16 coverageFormat; /* Format identifier--format = 2 */ + SortedArray16Of<RangeRecord<Types>> + rangeRecord; /* Array of glyph ranges--ordered by + * Start GlyphID. rangeCount entries + * long */ + public: + DEFINE_SIZE_ARRAY (4, rangeRecord); + + private: + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (rangeRecord.sanitize (c)); + } + + unsigned int get_coverage (hb_codepoint_t glyph_id) const + { + const RangeRecord<Types> &range = rangeRecord.bsearch (glyph_id); + return likely (range.first <= range.last) + ? (unsigned int) range.value + (glyph_id - range.first) + : NOT_COVERED; + } + + unsigned get_population () const + { + typename Types::large_int ret = 0; + for (const auto &r : rangeRecord) + ret += r.get_population (); + return ret > UINT_MAX ? UINT_MAX : (unsigned) ret; + } + + template <typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, Iterator glyphs) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + + unsigned num_ranges = 0; + hb_codepoint_t last = (hb_codepoint_t) -2; + for (auto g: glyphs) + { + if (last + 1 != g) + num_ranges++; + last = g; + } + + if (unlikely (!rangeRecord.serialize (c, num_ranges))) return_trace (false); + if (!num_ranges) return_trace (true); + + unsigned count = 0; + unsigned range = (unsigned) -1; + last = (hb_codepoint_t) -2; + for (auto g: glyphs) + { + if (last + 1 != g) + { + range++; + rangeRecord[range].first = g; + rangeRecord[range].value = count; + } + rangeRecord[range].last = g; + last = g; + count++; + } + + return_trace (true); + } + + bool intersects (const hb_set_t *glyphs) const + { + if (rangeRecord.len > glyphs->get_population () * hb_bit_storage ((unsigned) rangeRecord.len) / 2) + { + for (hb_codepoint_t g = HB_SET_VALUE_INVALID; glyphs->next (&g);) + if (get_coverage (g) != NOT_COVERED) + return true; + return false; + } + + return hb_any (+ hb_iter (rangeRecord) + | hb_map ([glyphs] (const RangeRecord<Types> &range) { return range.intersects (*glyphs); })); + } + bool intersects_coverage (const hb_set_t *glyphs, unsigned int index) const + { + auto *range = rangeRecord.as_array ().bsearch (index); + if (range) + return range->intersects (*glyphs); + return false; + } + + template <typename IterableOut, + hb_requires (hb_is_sink_of (IterableOut, hb_codepoint_t))> + void intersect_set (const hb_set_t &glyphs, IterableOut&& intersect_glyphs) const + { + /* Break out of loop for overlapping, broken, tables, + * to avoid fuzzer timouts. */ + hb_codepoint_t last = 0; + for (const auto& range : rangeRecord) + { + if (unlikely (range.first < last)) + break; + last = range.last; + for (hb_codepoint_t g = range.first - 1; + glyphs.next (&g) && g <= last;) + intersect_glyphs << g; + } + } + + template <typename set_t> + bool collect_coverage (set_t *glyphs) const + { + for (const auto& range: rangeRecord) + if (unlikely (!range.collect_coverage (glyphs))) + return false; + return true; + } + + public: + /* Older compilers need this to be public. */ + struct iter_t + { + void init (const CoverageFormat2_4 &c_) + { + c = &c_; + coverage = 0; + i = 0; + j = c->rangeRecord.len ? c->rangeRecord[0].first : 0; + if (unlikely (c->rangeRecord[0].first > c->rangeRecord[0].last)) + { + /* Broken table. Skip. */ + i = c->rangeRecord.len; + j = 0; + } + } + bool __more__ () const { return i < c->rangeRecord.len; } + void __next__ () + { + if (j >= c->rangeRecord[i].last) + { + i++; + if (__more__ ()) + { + unsigned int old = coverage; + j = c->rangeRecord[i].first; + coverage = c->rangeRecord[i].value; + if (unlikely (coverage != old + 1)) + { + /* Broken table. Skip. Important to avoid DoS. + * Also, our callers depend on coverage being + * consecutive and monotonically increasing, + * ie. iota(). */ + i = c->rangeRecord.len; + j = 0; + return; + } + } + else + j = 0; + return; + } + coverage++; + j++; + } + hb_codepoint_t get_glyph () const { return j; } + bool operator != (const iter_t& o) const + { return i != o.i || j != o.j; } + iter_t __end__ () const + { + iter_t it; + it.init (*c); + it.i = c->rangeRecord.len; + it.j = 0; + return it; + } + + private: + const struct CoverageFormat2_4 *c; + unsigned int i, coverage; + hb_codepoint_t j; + }; + private: +}; + +} +} +} + +#endif // #ifndef OT_LAYOUT_COMMON_COVERAGEFORMAT2_HH diff --git a/gfx/harfbuzz/src/OT/Layout/Common/RangeRecord.hh b/gfx/harfbuzz/src/OT/Layout/Common/RangeRecord.hh new file mode 100644 index 0000000000..a62629fad3 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/Common/RangeRecord.hh @@ -0,0 +1,85 @@ +/* + * Copyright © 2007,2008,2009 Red Hat, Inc. + * Copyright © 2010,2012 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. + * + * Red Hat Author(s): Behdad Esfahbod + * Google Author(s): Behdad Esfahbod, Garret Rieger + */ + +#ifndef OT_LAYOUT_COMMON_RANGERECORD_HH +#define OT_LAYOUT_COMMON_RANGERECORD_HH + +namespace OT { +namespace Layout { +namespace Common { + +template <typename Types> +struct RangeRecord +{ + typename Types::HBGlyphID first; /* First GlyphID in the range */ + typename Types::HBGlyphID last; /* Last GlyphID in the range */ + HBUINT16 value; /* Value */ + + DEFINE_SIZE_STATIC (2 + 2 * Types::size); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + int cmp (hb_codepoint_t g) const + { return g < first ? -1 : g <= last ? 0 : +1; } + + unsigned get_population () const + { + if (unlikely (last < first)) return 0; + return (last - first + 1); + } + + bool intersects (const hb_set_t &glyphs) const + { return glyphs.intersects (first, last); } + + template <typename set_t> + bool collect_coverage (set_t *glyphs) const + { return glyphs->add_range (first, last); } +}; + +} +} +} + +// TODO(garretrieger): This was previously implemented using +// DECLARE_NULL_NAMESPACE_BYTES_TEMPLATE1 (OT, RangeRecord, 9); +// but that only works when there is only a single namespace level. +// The macro should probably be fixed so it can work in this situation. +extern HB_INTERNAL const unsigned char _hb_Null_OT_RangeRecord[9]; +template <typename Spec> +struct Null<OT::Layout::Common::RangeRecord<Spec>> { + static OT::Layout::Common::RangeRecord<Spec> const & get_null () { + return *reinterpret_cast<const OT::Layout::Common::RangeRecord<Spec> *> (_hb_Null_OT_RangeRecord); + } +}; + + +#endif // #ifndef OT_LAYOUT_COMMON_RANGERECORD_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/Anchor.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/Anchor.hh new file mode 100644 index 0000000000..49e76e7750 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/Anchor.hh @@ -0,0 +1,83 @@ +#ifndef OT_LAYOUT_GPOS_ANCHOR_HH +#define OT_LAYOUT_GPOS_ANCHOR_HH + +#include "AnchorFormat1.hh" +#include "AnchorFormat2.hh" +#include "AnchorFormat3.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct Anchor +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + AnchorFormat1 format1; + AnchorFormat2 format2; + AnchorFormat3 format3; + } u; + public: + DEFINE_SIZE_UNION (2, format); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (!u.format.sanitize (c)) return_trace (false); + switch (u.format) { + case 1: return_trace (u.format1.sanitize (c)); + case 2: return_trace (u.format2.sanitize (c)); + case 3: return_trace (u.format3.sanitize (c)); + default:return_trace (true); + } + } + + void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id, + float *x, float *y) const + { + *x = *y = 0; + switch (u.format) { + case 1: u.format1.get_anchor (c, glyph_id, x, y); return; + case 2: u.format2.get_anchor (c, glyph_id, x, y); return; + case 3: u.format3.get_anchor (c, glyph_id, x, y); return; + default: return; + } + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + switch (u.format) { + case 1: return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer)))); + case 2: + if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING) + { + // AnchorFormat 2 just containins extra hinting information, so + // if hints are being dropped convert to format 1. + return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer)))); + } + return_trace (bool (reinterpret_cast<Anchor *> (u.format2.copy (c->serializer)))); + case 3: return_trace (u.format3.subset (c)); + default:return_trace (false); + } + } + + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + switch (u.format) { + case 1: case 2: + return; + case 3: + u.format3.collect_variation_indices (c); + return; + default: return; + } + } +}; + +} +} +} + +#endif // OT_LAYOUT_GPOS_ANCHOR_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat1.hh new file mode 100644 index 0000000000..738cc31bbf --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat1.hh @@ -0,0 +1,46 @@ +#ifndef OT_LAYOUT_GPOS_ANCHORFORMAT1_HH +#define OT_LAYOUT_GPOS_ANCHORFORMAT1_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct AnchorFormat1 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + FWORD xCoordinate; /* Horizontal value--in design units */ + FWORD yCoordinate; /* Vertical value--in design units */ + public: + DEFINE_SIZE_STATIC (6); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id HB_UNUSED, + float *x, float *y) const + { + hb_font_t *font = c->font; + *x = font->em_fscale_x (xCoordinate); + *y = font->em_fscale_y (yCoordinate); + } + + AnchorFormat1* copy (hb_serialize_context_t *c) const + { + TRACE_SERIALIZE (this); + AnchorFormat1* out = c->embed<AnchorFormat1> (this); + if (!out) return_trace (out); + out->format = 1; + return_trace (out); + } +}; + + +} +} +} + +#endif // OT_LAYOUT_GPOS_ANCHORFORMAT1_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat2.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat2.hh new file mode 100644 index 0000000000..70b4d19f53 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat2.hh @@ -0,0 +1,58 @@ +#ifndef OT_LAYOUT_GPOS_ANCHORFORMAT2_HH +#define OT_LAYOUT_GPOS_ANCHORFORMAT2_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct AnchorFormat2 +{ + + protected: + HBUINT16 format; /* Format identifier--format = 2 */ + FWORD xCoordinate; /* Horizontal value--in design units */ + FWORD yCoordinate; /* Vertical value--in design units */ + HBUINT16 anchorPoint; /* Index to glyph contour point */ + public: + DEFINE_SIZE_STATIC (8); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id, + float *x, float *y) const + { + hb_font_t *font = c->font; + +#ifdef HB_NO_HINTING + *x = font->em_fscale_x (xCoordinate); + *y = font->em_fscale_y (yCoordinate); + return; +#endif + + unsigned int x_ppem = font->x_ppem; + unsigned int y_ppem = font->y_ppem; + hb_position_t cx = 0, cy = 0; + bool ret; + + ret = (x_ppem || y_ppem) && + font->get_glyph_contour_point_for_origin (glyph_id, anchorPoint, HB_DIRECTION_LTR, &cx, &cy); + *x = ret && x_ppem ? cx : font->em_fscale_x (xCoordinate); + *y = ret && y_ppem ? cy : font->em_fscale_y (yCoordinate); + } + + AnchorFormat2* copy (hb_serialize_context_t *c) const + { + TRACE_SERIALIZE (this); + return_trace (c->embed<AnchorFormat2> (this)); + } +}; + +} +} +} + +#endif // OT_LAYOUT_GPOS_ANCHORFORMAT2_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat3.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat3.hh new file mode 100644 index 0000000000..2e30ab33c3 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorFormat3.hh @@ -0,0 +1,100 @@ +#ifndef OT_LAYOUT_GPOS_ANCHORFORMAT3_HH +#define OT_LAYOUT_GPOS_ANCHORFORMAT3_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct AnchorFormat3 +{ + protected: + HBUINT16 format; /* Format identifier--format = 3 */ + FWORD xCoordinate; /* Horizontal value--in design units */ + FWORD yCoordinate; /* Vertical value--in design units */ + Offset16To<Device> + xDeviceTable; /* Offset to Device table for X + * coordinate-- from beginning of + * Anchor table (may be NULL) */ + Offset16To<Device> + yDeviceTable; /* Offset to Device table for Y + * coordinate-- from beginning of + * Anchor table (may be NULL) */ + public: + DEFINE_SIZE_STATIC (10); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && xDeviceTable.sanitize (c, this) && yDeviceTable.sanitize (c, this)); + } + + void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id HB_UNUSED, + float *x, float *y) const + { + hb_font_t *font = c->font; + *x = font->em_fscale_x (xCoordinate); + *y = font->em_fscale_y (yCoordinate); + + if (font->x_ppem || font->num_coords) + *x += (this+xDeviceTable).get_x_delta (font, c->var_store, c->var_store_cache); + if (font->y_ppem || font->num_coords) + *y += (this+yDeviceTable).get_y_delta (font, c->var_store, c->var_store_cache); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->start_embed (*this); + if (unlikely (!out)) return_trace (false); + if (unlikely (!c->serializer->embed (format))) return_trace (false); + if (unlikely (!c->serializer->embed (xCoordinate))) return_trace (false); + if (unlikely (!c->serializer->embed (yCoordinate))) return_trace (false); + + unsigned x_varidx = xDeviceTable ? (this+xDeviceTable).get_variation_index () : HB_OT_LAYOUT_NO_VARIATIONS_INDEX; + if (c->plan->layout_variation_idx_delta_map->has (x_varidx)) + { + int delta = hb_second (c->plan->layout_variation_idx_delta_map->get (x_varidx)); + if (delta != 0) + { + if (!c->serializer->check_assign (out->xCoordinate, xCoordinate + delta, + HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + } + } + + unsigned y_varidx = yDeviceTable ? (this+yDeviceTable).get_variation_index () : HB_OT_LAYOUT_NO_VARIATIONS_INDEX; + if (c->plan->layout_variation_idx_delta_map->has (y_varidx)) + { + int delta = hb_second (c->plan->layout_variation_idx_delta_map->get (y_varidx)); + if (delta != 0) + { + if (!c->serializer->check_assign (out->yCoordinate, yCoordinate + delta, + HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + } + } + + if (c->plan->all_axes_pinned) + return_trace (c->serializer->check_assign (out->format, 1, HB_SERIALIZE_ERROR_INT_OVERFLOW)); + + if (!c->serializer->embed (xDeviceTable)) return_trace (false); + if (!c->serializer->embed (yDeviceTable)) return_trace (false); + + out->xDeviceTable.serialize_copy (c->serializer, xDeviceTable, this, 0, hb_serialize_context_t::Head, c->plan->layout_variation_idx_delta_map); + out->yDeviceTable.serialize_copy (c->serializer, yDeviceTable, this, 0, hb_serialize_context_t::Head, c->plan->layout_variation_idx_delta_map); + return_trace (out); + } + + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + (this+xDeviceTable).collect_variation_indices (c); + (this+yDeviceTable).collect_variation_indices (c); + } +}; + + +} +} +} + +#endif // OT_LAYOUT_GPOS_ANCHORFORMAT3_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorMatrix.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorMatrix.hh new file mode 100644 index 0000000000..c442efa1ea --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/AnchorMatrix.hh @@ -0,0 +1,77 @@ +#ifndef OT_LAYOUT_GPOS_ANCHORMATRIX_HH +#define OT_LAYOUT_GPOS_ANCHORMATRIX_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct AnchorMatrix +{ + HBUINT16 rows; /* Number of rows */ + UnsizedArrayOf<Offset16To<Anchor>> + matrixZ; /* Matrix of offsets to Anchor tables-- + * from beginning of AnchorMatrix table */ + public: + DEFINE_SIZE_ARRAY (2, matrixZ); + + bool sanitize (hb_sanitize_context_t *c, unsigned int cols) const + { + TRACE_SANITIZE (this); + if (!c->check_struct (this)) return_trace (false); + if (unlikely (hb_unsigned_mul_overflows (rows, cols))) return_trace (false); + unsigned int count = rows * cols; + if (!c->check_array (matrixZ.arrayZ, count)) return_trace (false); + for (unsigned int i = 0; i < count; i++) + if (!matrixZ[i].sanitize (c, this)) return_trace (false); + return_trace (true); + } + + const Anchor& get_anchor (unsigned int row, unsigned int col, + unsigned int cols, bool *found) const + { + *found = false; + if (unlikely (row >= rows || col >= cols)) return Null (Anchor); + *found = !matrixZ[row * cols + col].is_null (); + return this+matrixZ[row * cols + col]; + } + + template <typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + void collect_variation_indices (hb_collect_variation_indices_context_t *c, + Iterator index_iter) const + { + for (unsigned i : index_iter) + (this+matrixZ[i]).collect_variation_indices (c); + } + + template <typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + bool subset (hb_subset_context_t *c, + unsigned num_rows, + Iterator index_iter) const + { + TRACE_SUBSET (this); + + auto *out = c->serializer->start_embed (this); + + if (!index_iter) return_trace (false); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + out->rows = num_rows; + for (const unsigned i : index_iter) + { + auto *offset = c->serializer->embed (matrixZ[i]); + if (!offset) return_trace (false); + offset->serialize_subset (c, matrixZ[i], this); + } + + return_trace (true); + } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_ANCHORMATRIX_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/ChainContextPos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/ChainContextPos.hh new file mode 100644 index 0000000000..d551ac2a2b --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/ChainContextPos.hh @@ -0,0 +1,14 @@ +#ifndef OT_LAYOUT_GPOS_CHAINCONTEXTPOS_HH +#define OT_LAYOUT_GPOS_CHAINCONTEXTPOS_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct ChainContextPos : ChainContext {}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_CHAINCONTEXTPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/Common.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/Common.hh new file mode 100644 index 0000000000..408197454f --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/Common.hh @@ -0,0 +1,33 @@ +#ifndef OT_LAYOUT_GPOS_COMMON_HH +#define OT_LAYOUT_GPOS_COMMON_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +enum attach_type_t { + ATTACH_TYPE_NONE = 0X00, + + /* Each attachment should be either a mark or a cursive; can't be both. */ + ATTACH_TYPE_MARK = 0X01, + ATTACH_TYPE_CURSIVE = 0X02, +}; + +/* buffer **position** var allocations */ +#define attach_chain() var.i16[0] /* glyph to which this attaches to, relative to current glyphs; negative for going back, positive for forward. */ +#define attach_type() var.u8[2] /* attachment type */ +/* Note! if attach_chain() is zero, the value of attach_type() is irrelevant. */ + +template<typename Iterator, typename SrcLookup> +static void SinglePos_serialize (hb_serialize_context_t *c, + const SrcLookup *src, + Iterator it, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map, + bool all_axes_pinned); + + +} +} +} + +#endif // OT_LAYOUT_GPOS_COMMON_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/ContextPos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/ContextPos.hh new file mode 100644 index 0000000000..2a01eaa3a6 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/ContextPos.hh @@ -0,0 +1,14 @@ +#ifndef OT_LAYOUT_GPOS_CONTEXTPOS_HH +#define OT_LAYOUT_GPOS_CONTEXTPOS_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct ContextPos : Context {}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_CONTEXTPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/CursivePos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/CursivePos.hh new file mode 100644 index 0000000000..c105cfb091 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/CursivePos.hh @@ -0,0 +1,35 @@ +#ifndef OT_LAYOUT_GPOS_CURSIVEPOS_HH +#define OT_LAYOUT_GPOS_CURSIVEPOS_HH + +#include "CursivePosFormat1.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct CursivePos +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + CursivePosFormat1 format1; + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); + default:return_trace (c->default_return_value ()); + } + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_CURSIVEPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/CursivePosFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/CursivePosFormat1.hh new file mode 100644 index 0000000000..7f58fac8b8 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/CursivePosFormat1.hh @@ -0,0 +1,301 @@ +#ifndef OT_LAYOUT_GPOS_CURSIVEPOSFORMAT1_HH +#define OT_LAYOUT_GPOS_CURSIVEPOSFORMAT1_HH + +#include "Anchor.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct EntryExitRecord +{ + friend struct CursivePosFormat1; + + bool sanitize (hb_sanitize_context_t *c, const void *base) const + { + TRACE_SANITIZE (this); + return_trace (entryAnchor.sanitize (c, base) && exitAnchor.sanitize (c, base)); + } + + void collect_variation_indices (hb_collect_variation_indices_context_t *c, + const void *src_base) const + { + (src_base+entryAnchor).collect_variation_indices (c); + (src_base+exitAnchor).collect_variation_indices (c); + } + + EntryExitRecord* subset (hb_subset_context_t *c, + const void *src_base) const + { + TRACE_SERIALIZE (this); + auto *out = c->serializer->embed (this); + if (unlikely (!out)) return_trace (nullptr); + + out->entryAnchor.serialize_subset (c, entryAnchor, src_base); + out->exitAnchor.serialize_subset (c, exitAnchor, src_base); + return_trace (out); + } + + protected: + Offset16To<Anchor> + entryAnchor; /* Offset to EntryAnchor table--from + * beginning of CursivePos + * subtable--may be NULL */ + Offset16To<Anchor> + exitAnchor; /* Offset to ExitAnchor table--from + * beginning of CursivePos + * subtable--may be NULL */ + public: + DEFINE_SIZE_STATIC (4); +}; + +static void +reverse_cursive_minor_offset (hb_glyph_position_t *pos, unsigned int i, hb_direction_t direction, unsigned int new_parent) { + int chain = pos[i].attach_chain(), type = pos[i].attach_type(); + if (likely (!chain || 0 == (type & ATTACH_TYPE_CURSIVE))) + return; + + pos[i].attach_chain() = 0; + + unsigned int j = (int) i + chain; + + /* Stop if we see new parent in the chain. */ + if (j == new_parent) + return; + + reverse_cursive_minor_offset (pos, j, direction, new_parent); + + if (HB_DIRECTION_IS_HORIZONTAL (direction)) + pos[j].y_offset = -pos[i].y_offset; + else + pos[j].x_offset = -pos[i].x_offset; + + pos[j].attach_chain() = -chain; + pos[j].attach_type() = type; +} + + +struct CursivePosFormat1 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + Offset16To<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of subtable */ + Array16Of<EntryExitRecord> + entryExitRecord; /* Array of EntryExit records--in + * Coverage Index order */ + public: + DEFINE_SIZE_ARRAY (6, entryExitRecord); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && entryExitRecord.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + + hb_zip (this+coverage, entryExitRecord) + | hb_filter (c->glyph_set, hb_first) + | hb_map (hb_second) + | hb_apply ([&] (const EntryExitRecord& record) { record.collect_variation_indices (c, this); }) + ; + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; } + + const Coverage &get_coverage () const { return this+coverage; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + + const EntryExitRecord &this_record = entryExitRecord[(this+coverage).get_coverage (buffer->cur().codepoint)]; + if (!this_record.entryAnchor) return_trace (false); + + hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; + skippy_iter.reset (buffer->idx, 1); + unsigned unsafe_from; + if (!skippy_iter.prev (&unsafe_from)) + { + buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1); + return_trace (false); + } + + const EntryExitRecord &prev_record = entryExitRecord[(this+coverage).get_coverage (buffer->info[skippy_iter.idx].codepoint)]; + if (!prev_record.exitAnchor) + { + buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1); + return_trace (false); + } + + unsigned int i = skippy_iter.idx; + unsigned int j = buffer->idx; + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "cursive attaching glyph at %d to glyph at %d", + i, j); + } + + buffer->unsafe_to_break (i, j + 1); + float entry_x, entry_y, exit_x, exit_y; + (this+prev_record.exitAnchor).get_anchor (c, buffer->info[i].codepoint, &exit_x, &exit_y); + (this+this_record.entryAnchor).get_anchor (c, buffer->info[j].codepoint, &entry_x, &entry_y); + + hb_glyph_position_t *pos = buffer->pos; + + hb_position_t d; + /* Main-direction adjustment */ + switch (c->direction) { + case HB_DIRECTION_LTR: + pos[i].x_advance = roundf (exit_x) + pos[i].x_offset; + + d = roundf (entry_x) + pos[j].x_offset; + pos[j].x_advance -= d; + pos[j].x_offset -= d; + break; + case HB_DIRECTION_RTL: + d = roundf (exit_x) + pos[i].x_offset; + pos[i].x_advance -= d; + pos[i].x_offset -= d; + + pos[j].x_advance = roundf (entry_x) + pos[j].x_offset; + break; + case HB_DIRECTION_TTB: + pos[i].y_advance = roundf (exit_y) + pos[i].y_offset; + + d = roundf (entry_y) + pos[j].y_offset; + pos[j].y_advance -= d; + pos[j].y_offset -= d; + break; + case HB_DIRECTION_BTT: + d = roundf (exit_y) + pos[i].y_offset; + pos[i].y_advance -= d; + pos[i].y_offset -= d; + + pos[j].y_advance = roundf (entry_y); + break; + case HB_DIRECTION_INVALID: + default: + break; + } + + /* Cross-direction adjustment */ + + /* We attach child to parent (think graph theory and rooted trees whereas + * the root stays on baseline and each node aligns itself against its + * parent. + * + * Optimize things for the case of RightToLeft, as that's most common in + * Arabic. */ + unsigned int child = i; + unsigned int parent = j; + hb_position_t x_offset = entry_x - exit_x; + hb_position_t y_offset = entry_y - exit_y; + if (!(c->lookup_props & LookupFlag::RightToLeft)) + { + unsigned int k = child; + child = parent; + parent = k; + x_offset = -x_offset; + y_offset = -y_offset; + } + + /* If child was already connected to someone else, walk through its old + * chain and reverse the link direction, such that the whole tree of its + * previous connection now attaches to new parent. Watch out for case + * where new parent is on the path from old chain... + */ + reverse_cursive_minor_offset (pos, child, c->direction, parent); + + pos[child].attach_type() = ATTACH_TYPE_CURSIVE; + pos[child].attach_chain() = (int) parent - (int) child; + buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT; + if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction))) + pos[child].y_offset = y_offset; + else + pos[child].x_offset = x_offset; + + /* If parent was attached to child, separate them. + * https://github.com/harfbuzz/harfbuzz/issues/2469 + */ + if (unlikely (pos[parent].attach_chain() == -pos[child].attach_chain())) + { + pos[parent].attach_chain() = 0; + if (likely (HB_DIRECTION_IS_HORIZONTAL (c->direction))) + pos[parent].y_offset = 0; + else + pos[parent].x_offset = 0; + } + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "cursive attached glyph at %d to glyph at %d", + i, j); + } + + buffer->idx++; + return_trace (true); + } + + template <typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + void serialize (hb_subset_context_t *c, + Iterator it, + const void *src_base) + { + if (unlikely (!c->serializer->extend_min ((*this)))) return; + this->format = 1; + this->entryExitRecord.len = it.len (); + + for (const EntryExitRecord& entry_record : + it + | hb_map (hb_second)) + entry_record.subset (c, src_base); + + auto glyphs = + + it + | hb_map_retains_sorting (hb_first) + ; + + coverage.serialize_serialize (c->serializer, glyphs); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!out)) return_trace (false); + + auto it = + + hb_zip (this+coverage, entryExitRecord) + | hb_filter (glyphset, hb_first) + | hb_map_retains_sorting ([&] (hb_pair_t<hb_codepoint_t, const EntryExitRecord&> p) -> hb_pair_t<hb_codepoint_t, const EntryExitRecord&> + { return hb_pair (glyph_map[p.first], p.second);}) + ; + + bool ret = bool (it); + out->serialize (c, it, this); + return_trace (ret); + } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_CURSIVEPOSFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/ExtensionPos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/ExtensionPos.hh new file mode 100644 index 0000000000..d1808adab4 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/ExtensionPos.hh @@ -0,0 +1,17 @@ +#ifndef OT_LAYOUT_GPOS_EXTENSIONPOS_HH +#define OT_LAYOUT_GPOS_EXTENSIONPOS_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct ExtensionPos : Extension<ExtensionPos> +{ + typedef struct PosLookupSubTable SubTable; +}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_EXTENSIONPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/GPOS.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/GPOS.hh new file mode 100644 index 0000000000..9493ec987e --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/GPOS.hh @@ -0,0 +1,171 @@ +#ifndef OT_LAYOUT_GPOS_GPOS_HH +#define OT_LAYOUT_GPOS_GPOS_HH + +#include "../../../hb-ot-layout-common.hh" +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" +#include "PosLookup.hh" + +namespace OT { + +using Layout::GPOS_impl::PosLookup; + +namespace Layout { + +static void +propagate_attachment_offsets (hb_glyph_position_t *pos, + unsigned int len, + unsigned int i, + hb_direction_t direction, + unsigned nesting_level = HB_MAX_NESTING_LEVEL); + +/* + * GPOS -- Glyph Positioning + * https://docs.microsoft.com/en-us/typography/opentype/spec/gpos + */ + +struct GPOS : GSUBGPOS +{ + static constexpr hb_tag_t tableTag = HB_OT_TAG_GPOS; + + using Lookup = PosLookup; + + const PosLookup& get_lookup (unsigned int i) const + { return static_cast<const PosLookup &> (GSUBGPOS::get_lookup (i)); } + + static inline void position_start (hb_font_t *font, hb_buffer_t *buffer); + static inline void position_finish_advances (hb_font_t *font, hb_buffer_t *buffer); + static inline void position_finish_offsets (hb_font_t *font, hb_buffer_t *buffer); + + bool subset (hb_subset_context_t *c) const + { + hb_subset_layout_context_t l (c, tableTag); + return GSUBGPOS::subset<PosLookup> (&l); + } + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (GSUBGPOS::sanitize<PosLookup> (c)); + } + + HB_INTERNAL bool is_blocklisted (hb_blob_t *blob, + hb_face_t *face) const; + + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + for (unsigned i = 0; i < GSUBGPOS::get_lookup_count (); i++) + { + if (!c->gpos_lookups->has (i)) continue; + const PosLookup &l = get_lookup (i); + l.dispatch (c); + } + } + + void closure_lookups (hb_face_t *face, + const hb_set_t *glyphs, + hb_set_t *lookup_indexes /* IN/OUT */) const + { GSUBGPOS::closure_lookups<PosLookup> (face, glyphs, lookup_indexes); } + + typedef GSUBGPOS::accelerator_t<GPOS> accelerator_t; +}; + + +static void +propagate_attachment_offsets (hb_glyph_position_t *pos, + unsigned int len, + unsigned int i, + hb_direction_t direction, + unsigned nesting_level) +{ + /* Adjusts offsets of attached glyphs (both cursive and mark) to accumulate + * offset of glyph they are attached to. */ + int chain = pos[i].attach_chain(), type = pos[i].attach_type(); + if (likely (!chain)) + return; + + pos[i].attach_chain() = 0; + + unsigned int j = (int) i + chain; + + if (unlikely (j >= len)) + return; + + if (unlikely (!nesting_level)) + return; + + propagate_attachment_offsets (pos, len, j, direction, nesting_level - 1); + + assert (!!(type & GPOS_impl::ATTACH_TYPE_MARK) ^ !!(type & GPOS_impl::ATTACH_TYPE_CURSIVE)); + + if (type & GPOS_impl::ATTACH_TYPE_CURSIVE) + { + if (HB_DIRECTION_IS_HORIZONTAL (direction)) + pos[i].y_offset += pos[j].y_offset; + else + pos[i].x_offset += pos[j].x_offset; + } + else /*if (type & GPOS_impl::ATTACH_TYPE_MARK)*/ + { + pos[i].x_offset += pos[j].x_offset; + pos[i].y_offset += pos[j].y_offset; + + assert (j < i); + if (HB_DIRECTION_IS_FORWARD (direction)) + for (unsigned int k = j; k < i; k++) { + pos[i].x_offset -= pos[k].x_advance; + pos[i].y_offset -= pos[k].y_advance; + } + else + for (unsigned int k = j + 1; k < i + 1; k++) { + pos[i].x_offset += pos[k].x_advance; + pos[i].y_offset += pos[k].y_advance; + } + } +} + +void +GPOS::position_start (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer) +{ + unsigned int count = buffer->len; + for (unsigned int i = 0; i < count; i++) + buffer->pos[i].attach_chain() = buffer->pos[i].attach_type() = 0; +} + +void +GPOS::position_finish_advances (hb_font_t *font HB_UNUSED, hb_buffer_t *buffer HB_UNUSED) +{ + //_hb_buffer_assert_gsubgpos_vars (buffer); +} + +void +GPOS::position_finish_offsets (hb_font_t *font, hb_buffer_t *buffer) +{ + _hb_buffer_assert_gsubgpos_vars (buffer); + + unsigned int len; + hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, &len); + hb_direction_t direction = buffer->props.direction; + + /* Handle attachments */ + if (buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT) + for (unsigned i = 0; i < len; i++) + propagate_attachment_offsets (pos, len, i, direction); + + if (unlikely (font->slant)) + { + for (unsigned i = 0; i < len; i++) + if (unlikely (pos[i].y_offset)) + pos[i].x_offset += _hb_roundf (font->slant_xy * pos[i].y_offset); + } +} + +} + +struct GPOS_accelerator_t : Layout::GPOS::accelerator_t { + GPOS_accelerator_t (hb_face_t *face) : Layout::GPOS::accelerator_t (face) {} +}; + +} + +#endif /* OT_LAYOUT_GPOS_GPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/LigatureArray.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/LigatureArray.hh new file mode 100644 index 0000000000..a2d807cc32 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/LigatureArray.hh @@ -0,0 +1,56 @@ +#ifndef OT_LAYOUT_GPOS_LIGATUREARRAY_HH +#define OT_LAYOUT_GPOS_LIGATUREARRAY_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + + +typedef AnchorMatrix LigatureAttach; /* component-major-- + * in order of writing direction--, + * mark-minor-- + * ordered by class--zero-based. */ + +/* Array of LigatureAttach tables ordered by LigatureCoverage Index */ +struct LigatureArray : List16OfOffset16To<LigatureAttach> +{ + template <typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + bool subset (hb_subset_context_t *c, + Iterator coverage, + unsigned class_count, + const hb_map_t *klass_mapping) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + + auto *out = c->serializer->start_embed (this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + for (const auto _ : + hb_zip (coverage, *this) + | hb_filter (glyphset, hb_first)) + { + auto *matrix = out->serialize_append (c->serializer); + if (unlikely (!matrix)) return_trace (false); + + const LigatureAttach& src = (this + _.second); + auto indexes = + + hb_range (src.rows * class_count) + | hb_filter ([=] (unsigned index) { return klass_mapping->has (index % class_count); }) + ; + matrix->serialize_subset (c, + _.second, + this, + src.rows, + indexes); + } + return_trace (this->len); + } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_LIGATUREARRAY_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/MarkArray.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkArray.hh new file mode 100644 index 0000000000..cb5e8b2689 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkArray.hh @@ -0,0 +1,128 @@ +#ifndef OT_LAYOUT_GPOS_MARKARRAY_HH +#define OT_LAYOUT_GPOS_MARKARRAY_HH + +#include "AnchorMatrix.hh" +#include "MarkRecord.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct MarkArray : Array16Of<MarkRecord> /* Array of MarkRecords--in Coverage order */ +{ + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (Array16Of<MarkRecord>::sanitize (c, this)); + } + + bool apply (hb_ot_apply_context_t *c, + unsigned int mark_index, unsigned int glyph_index, + const AnchorMatrix &anchors, unsigned int class_count, + unsigned int glyph_pos) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + const MarkRecord &record = Array16Of<MarkRecord>::operator[](mark_index); + unsigned int mark_class = record.klass; + + const Anchor& mark_anchor = this + record.markAnchor; + bool found; + const Anchor& glyph_anchor = anchors.get_anchor (glyph_index, mark_class, class_count, &found); + /* If this subtable doesn't have an anchor for this base and this class, + * return false such that the subsequent subtables have a chance at it. */ + if (unlikely (!found)) return_trace (false); + + float mark_x, mark_y, base_x, base_y; + + buffer->unsafe_to_break (glyph_pos, buffer->idx + 1); + mark_anchor.get_anchor (c, buffer->cur().codepoint, &mark_x, &mark_y); + glyph_anchor.get_anchor (c, buffer->info[glyph_pos].codepoint, &base_x, &base_y); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "attaching mark glyph at %d to glyph at %d", + c->buffer->idx, glyph_pos); + } + + hb_glyph_position_t &o = buffer->cur_pos(); + o.x_offset = roundf (base_x - mark_x); + o.y_offset = roundf (base_y - mark_y); + o.attach_type() = ATTACH_TYPE_MARK; + o.attach_chain() = (int) glyph_pos - (int) buffer->idx; + buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT; + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "attached mark glyph at %d to glyph at %d", + c->buffer->idx, glyph_pos); + } + + buffer->idx++; + return_trace (true); + } + + template <typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + bool subset (hb_subset_context_t *c, + Iterator coverage, + const hb_map_t *klass_mapping) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + + auto* out = c->serializer->start_embed (this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + auto mark_iter = + + hb_zip (coverage, this->iter ()) + | hb_filter (glyphset, hb_first) + | hb_map (hb_second) + ; + + unsigned new_length = 0; + for (const auto& mark_record : mark_iter) { + if (unlikely (!mark_record.subset (c, this, klass_mapping))) + return_trace (false); + new_length++; + } + + if (unlikely (!c->serializer->check_assign (out->len, new_length, + HB_SERIALIZE_ERROR_ARRAY_OVERFLOW))) + return_trace (false); + + return_trace (true); + } +}; + +HB_INTERNAL inline +void Markclass_closure_and_remap_indexes (const Coverage &mark_coverage, + const MarkArray &mark_array, + const hb_set_t &glyphset, + hb_map_t* klass_mapping /* INOUT */) +{ + hb_set_t orig_classes; + + + hb_zip (mark_coverage, mark_array) + | hb_filter (glyphset, hb_first) + | hb_map (hb_second) + | hb_map (&MarkRecord::get_class) + | hb_sink (orig_classes) + ; + + unsigned idx = 0; + for (auto klass : orig_classes.iter ()) + { + if (klass_mapping->has (klass)) continue; + klass_mapping->set (klass, idx); + idx++; + } +} + +} +} +} + +#endif /* OT_LAYOUT_GPOS_MARKARRAY_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/MarkBasePos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkBasePos.hh new file mode 100644 index 0000000000..edf7099c07 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkBasePos.hh @@ -0,0 +1,41 @@ +#ifndef OT_LAYOUT_GPOS_MARKBASEPOS_HH +#define OT_LAYOUT_GPOS_MARKBASEPOS_HH + +#include "MarkBasePosFormat1.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct MarkBasePos +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + MarkBasePosFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + MarkBasePosFormat1_2<MediumTypes> format2; +#endif + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_MARKBASEPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/MarkBasePosFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkBasePosFormat1.hh new file mode 100644 index 0000000000..ebb8c31c67 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkBasePosFormat1.hh @@ -0,0 +1,219 @@ +#ifndef OT_LAYOUT_GPOS_MARKBASEPOSFORMAT1_HH +#define OT_LAYOUT_GPOS_MARKBASEPOSFORMAT1_HH + +#include "MarkArray.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +typedef AnchorMatrix BaseArray; /* base-major-- + * in order of BaseCoverage Index--, + * mark-minor-- + * ordered by class--zero-based. */ + +template <typename Types> +struct MarkBasePosFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + markCoverage; /* Offset to MarkCoverage table--from + * beginning of MarkBasePos subtable */ + typename Types::template OffsetTo<Coverage> + baseCoverage; /* Offset to BaseCoverage table--from + * beginning of MarkBasePos subtable */ + HBUINT16 classCount; /* Number of classes defined for marks */ + typename Types::template OffsetTo<MarkArray> + markArray; /* Offset to MarkArray table--from + * beginning of MarkBasePos subtable */ + typename Types::template OffsetTo<BaseArray> + baseArray; /* Offset to BaseArray table--from + * beginning of MarkBasePos subtable */ + + public: + DEFINE_SIZE_STATIC (4 + 4 * Types::size); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + markCoverage.sanitize (c, this) && + baseCoverage.sanitize (c, this) && + markArray.sanitize (c, this) && + baseArray.sanitize (c, this, (unsigned int) classCount)); + } + + bool intersects (const hb_set_t *glyphs) const + { + return (this+markCoverage).intersects (glyphs) && + (this+baseCoverage).intersects (glyphs); + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + + hb_zip (this+markCoverage, this+markArray) + | hb_filter (c->glyph_set, hb_first) + | hb_map (hb_second) + | hb_apply ([&] (const MarkRecord& record) { record.collect_variation_indices (c, &(this+markArray)); }) + ; + + hb_map_t klass_mapping; + Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, *c->glyph_set, &klass_mapping); + + unsigned basecount = (this+baseArray).rows; + auto base_iter = + + hb_zip (this+baseCoverage, hb_range (basecount)) + | hb_filter (c->glyph_set, hb_first) + | hb_map (hb_second) + ; + + hb_sorted_vector_t<unsigned> base_indexes; + for (const unsigned row : base_iter) + { + + hb_range ((unsigned) classCount) + | hb_filter (klass_mapping) + | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; }) + | hb_sink (base_indexes) + ; + } + (this+baseArray).collect_variation_indices (c, base_indexes.iter ()); + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+markCoverage).collect_coverage (c->input))) return; + if (unlikely (!(this+baseCoverage).collect_coverage (c->input))) return; + } + + const Coverage &get_coverage () const { return this+markCoverage; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + unsigned int mark_index = (this+markCoverage).get_coverage (buffer->cur().codepoint); + if (likely (mark_index == NOT_COVERED)) return_trace (false); + + /* Now we search backwards for a non-mark glyph */ + hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; + skippy_iter.reset (buffer->idx, 1); + skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks); + do { + unsigned unsafe_from; + if (!skippy_iter.prev (&unsafe_from)) + { + buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1); + return_trace (false); + } + + /* We only want to attach to the first of a MultipleSubst sequence. + * https://github.com/harfbuzz/harfbuzz/issues/740 + * Reject others... + * ...but stop if we find a mark in the MultipleSubst sequence: + * https://github.com/harfbuzz/harfbuzz/issues/1020 */ + if (!_hb_glyph_info_multiplied (&buffer->info[skippy_iter.idx]) || + 0 == _hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx]) || + (skippy_iter.idx == 0 || + _hb_glyph_info_is_mark (&buffer->info[skippy_iter.idx - 1]) || + !_hb_glyph_info_multiplied (&buffer->info[skippy_iter.idx - 1]) || + _hb_glyph_info_get_lig_id (&buffer->info[skippy_iter.idx]) != + _hb_glyph_info_get_lig_id (&buffer->info[skippy_iter.idx - 1]) || + _hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx]) != + _hb_glyph_info_get_lig_comp (&buffer->info[skippy_iter.idx - 1]) + 1 + )) + break; + skippy_iter.reject (); + } while (true); + + /* Checking that matched glyph is actually a base glyph by GDEF is too strong; disabled */ + //if (!_hb_glyph_info_is_base_glyph (&buffer->info[skippy_iter.idx])) { return_trace (false); } + + unsigned int base_index = (this+baseCoverage).get_coverage (buffer->info[skippy_iter.idx].codepoint); + if (base_index == NOT_COVERED) + { + buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1); + return_trace (false); + } + + return_trace ((this+markArray).apply (c, mark_index, base_index, this+baseArray, classCount, skippy_iter.idx)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + hb_map_t klass_mapping; + Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, glyphset, &klass_mapping); + + if (!klass_mapping.get_population ()) return_trace (false); + out->classCount = klass_mapping.get_population (); + + auto mark_iter = + + hb_zip (this+markCoverage, this+markArray) + | hb_filter (glyphset, hb_first) + ; + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + mark_iter + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + + if (!out->markCoverage.serialize_serialize (c->serializer, new_coverage.iter ())) + return_trace (false); + + out->markArray.serialize_subset (c, markArray, this, + (this+markCoverage).iter (), + &klass_mapping); + + unsigned basecount = (this+baseArray).rows; + auto base_iter = + + hb_zip (this+baseCoverage, hb_range (basecount)) + | hb_filter (glyphset, hb_first) + ; + + new_coverage.reset (); + + base_iter + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + + if (!out->baseCoverage.serialize_serialize (c->serializer, new_coverage.iter ())) + return_trace (false); + + hb_sorted_vector_t<unsigned> base_indexes; + for (const unsigned row : + base_iter + | hb_map (hb_second)) + { + + hb_range ((unsigned) classCount) + | hb_filter (klass_mapping) + | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; }) + | hb_sink (base_indexes) + ; + } + + out->baseArray.serialize_subset (c, baseArray, this, + base_iter.len (), + base_indexes.iter ()); + + return_trace (true); + } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_MARKBASEPOSFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/MarkLigPos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkLigPos.hh new file mode 100644 index 0000000000..09152fd876 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkLigPos.hh @@ -0,0 +1,41 @@ +#ifndef OT_LAYOUT_GPOS_MARKLIGPOS_HH +#define OT_LAYOUT_GPOS_MARKLIGPOS_HH + +#include "MarkLigPosFormat1.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct MarkLigPos +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + MarkLigPosFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + MarkLigPosFormat1_2<MediumTypes> format2; +#endif + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_MARKLIGPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/MarkLigPosFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkLigPosFormat1.hh new file mode 100644 index 0000000000..1a8021237e --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkLigPosFormat1.hh @@ -0,0 +1,206 @@ +#ifndef OT_LAYOUT_GPOS_MARKLIGPOSFORMAT1_HH +#define OT_LAYOUT_GPOS_MARKLIGPOSFORMAT1_HH + +#include "LigatureArray.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + + +template <typename Types> +struct MarkLigPosFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + markCoverage; /* Offset to Mark Coverage table--from + * beginning of MarkLigPos subtable */ + typename Types::template OffsetTo<Coverage> + ligatureCoverage; /* Offset to Ligature Coverage + * table--from beginning of MarkLigPos + * subtable */ + HBUINT16 classCount; /* Number of defined mark classes */ + typename Types::template OffsetTo<MarkArray> + markArray; /* Offset to MarkArray table--from + * beginning of MarkLigPos subtable */ + typename Types::template OffsetTo<LigatureArray> + ligatureArray; /* Offset to LigatureArray table--from + * beginning of MarkLigPos subtable */ + public: + DEFINE_SIZE_STATIC (4 + 4 * Types::size); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + markCoverage.sanitize (c, this) && + ligatureCoverage.sanitize (c, this) && + markArray.sanitize (c, this) && + ligatureArray.sanitize (c, this, (unsigned int) classCount)); + } + + bool intersects (const hb_set_t *glyphs) const + { + return (this+markCoverage).intersects (glyphs) && + (this+ligatureCoverage).intersects (glyphs); + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + + hb_zip (this+markCoverage, this+markArray) + | hb_filter (c->glyph_set, hb_first) + | hb_map (hb_second) + | hb_apply ([&] (const MarkRecord& record) { record.collect_variation_indices (c, &(this+markArray)); }) + ; + + hb_map_t klass_mapping; + Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, *c->glyph_set, &klass_mapping); + + unsigned ligcount = (this+ligatureArray).len; + auto lig_iter = + + hb_zip (this+ligatureCoverage, hb_range (ligcount)) + | hb_filter (c->glyph_set, hb_first) + | hb_map (hb_second) + ; + + const LigatureArray& lig_array = this+ligatureArray; + for (const unsigned i : lig_iter) + { + hb_sorted_vector_t<unsigned> lig_indexes; + unsigned row_count = lig_array[i].rows; + for (unsigned row : + hb_range (row_count)) + { + + hb_range ((unsigned) classCount) + | hb_filter (klass_mapping) + | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; }) + | hb_sink (lig_indexes) + ; + } + + lig_array[i].collect_variation_indices (c, lig_indexes.iter ()); + } + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+markCoverage).collect_coverage (c->input))) return; + if (unlikely (!(this+ligatureCoverage).collect_coverage (c->input))) return; + } + + const Coverage &get_coverage () const { return this+markCoverage; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + unsigned int mark_index = (this+markCoverage).get_coverage (buffer->cur().codepoint); + if (likely (mark_index == NOT_COVERED)) return_trace (false); + + /* Now we search backwards for a non-mark glyph */ + hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; + skippy_iter.reset (buffer->idx, 1); + skippy_iter.set_lookup_props (LookupFlag::IgnoreMarks); + unsigned unsafe_from; + if (!skippy_iter.prev (&unsafe_from)) + { + buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1); + return_trace (false); + } + + /* Checking that matched glyph is actually a ligature by GDEF is too strong; disabled */ + //if (!_hb_glyph_info_is_ligature (&buffer->info[skippy_iter.idx])) { return_trace (false); } + + unsigned int j = skippy_iter.idx; + unsigned int lig_index = (this+ligatureCoverage).get_coverage (buffer->info[j].codepoint); + if (lig_index == NOT_COVERED) + { + buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1); + return_trace (false); + } + + const LigatureArray& lig_array = this+ligatureArray; + const LigatureAttach& lig_attach = lig_array[lig_index]; + + /* Find component to attach to */ + unsigned int comp_count = lig_attach.rows; + if (unlikely (!comp_count)) + { + buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1); + return_trace (false); + } + + /* We must now check whether the ligature ID of the current mark glyph + * is identical to the ligature ID of the found ligature. If yes, we + * can directly use the component index. If not, we attach the mark + * glyph to the last component of the ligature. */ + unsigned int comp_index; + unsigned int lig_id = _hb_glyph_info_get_lig_id (&buffer->info[j]); + unsigned int mark_id = _hb_glyph_info_get_lig_id (&buffer->cur()); + unsigned int mark_comp = _hb_glyph_info_get_lig_comp (&buffer->cur()); + if (lig_id && lig_id == mark_id && mark_comp > 0) + comp_index = hb_min (comp_count, _hb_glyph_info_get_lig_comp (&buffer->cur())) - 1; + else + comp_index = comp_count - 1; + + return_trace ((this+markArray).apply (c, mark_index, comp_index, lig_attach, classCount, j)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + hb_map_t klass_mapping; + Markclass_closure_and_remap_indexes (this+markCoverage, this+markArray, glyphset, &klass_mapping); + + if (!klass_mapping.get_population ()) return_trace (false); + out->classCount = klass_mapping.get_population (); + + auto mark_iter = + + hb_zip (this+markCoverage, this+markArray) + | hb_filter (glyphset, hb_first) + ; + + auto new_mark_coverage = + + mark_iter + | hb_map_retains_sorting (hb_first) + | hb_map_retains_sorting (glyph_map) + ; + + if (!out->markCoverage.serialize_serialize (c->serializer, new_mark_coverage)) + return_trace (false); + + out->markArray.serialize_subset (c, markArray, this, + (this+markCoverage).iter (), + &klass_mapping); + + auto new_ligature_coverage = + + hb_iter (this + ligatureCoverage) + | hb_filter (glyphset) + | hb_map_retains_sorting (glyph_map) + ; + + if (!out->ligatureCoverage.serialize_serialize (c->serializer, new_ligature_coverage)) + return_trace (false); + + out->ligatureArray.serialize_subset (c, ligatureArray, this, + hb_iter (this+ligatureCoverage), classCount, &klass_mapping); + + return_trace (true); + } + +}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_MARKLIGPOSFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/MarkMarkPos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkMarkPos.hh new file mode 100644 index 0000000000..4118fc304f --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkMarkPos.hh @@ -0,0 +1,42 @@ +#ifndef OT_LAYOUT_GPOS_MARKMARKPOS_HH +#define OT_LAYOUT_GPOS_MARKMARKPOS_HH + +#include "MarkMarkPosFormat1.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct MarkMarkPos +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + MarkMarkPosFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + MarkMarkPosFormat1_2<MediumTypes> format2; +#endif + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_MARKMARKPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/MarkMarkPosFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkMarkPosFormat1.hh new file mode 100644 index 0000000000..fbcebb8044 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkMarkPosFormat1.hh @@ -0,0 +1,228 @@ +#ifndef OT_LAYOUT_GPOS_MARKMARKPOSFORMAT1_HH +#define OT_LAYOUT_GPOS_MARKMARKPOSFORMAT1_HH + +#include "MarkMarkPosFormat1.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +typedef AnchorMatrix Mark2Array; /* mark2-major-- + * in order of Mark2Coverage Index--, + * mark1-minor-- + * ordered by class--zero-based. */ + +template <typename Types> +struct MarkMarkPosFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + mark1Coverage; /* Offset to Combining Mark1 Coverage + * table--from beginning of MarkMarkPos + * subtable */ + typename Types::template OffsetTo<Coverage> + mark2Coverage; /* Offset to Combining Mark2 Coverage + * table--from beginning of MarkMarkPos + * subtable */ + HBUINT16 classCount; /* Number of defined mark classes */ + typename Types::template OffsetTo<MarkArray> + mark1Array; /* Offset to Mark1Array table--from + * beginning of MarkMarkPos subtable */ + typename Types::template OffsetTo<Mark2Array> + mark2Array; /* Offset to Mark2Array table--from + * beginning of MarkMarkPos subtable */ + public: + DEFINE_SIZE_STATIC (4 + 4 * Types::size); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + mark1Coverage.sanitize (c, this) && + mark2Coverage.sanitize (c, this) && + mark1Array.sanitize (c, this) && + mark2Array.sanitize (c, this, (unsigned int) classCount)); + } + + bool intersects (const hb_set_t *glyphs) const + { + return (this+mark1Coverage).intersects (glyphs) && + (this+mark2Coverage).intersects (glyphs); + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + + hb_zip (this+mark1Coverage, this+mark1Array) + | hb_filter (c->glyph_set, hb_first) + | hb_map (hb_second) + | hb_apply ([&] (const MarkRecord& record) { record.collect_variation_indices (c, &(this+mark1Array)); }) + ; + + hb_map_t klass_mapping; + Markclass_closure_and_remap_indexes (this+mark1Coverage, this+mark1Array, *c->glyph_set, &klass_mapping); + + unsigned mark2_count = (this+mark2Array).rows; + auto mark2_iter = + + hb_zip (this+mark2Coverage, hb_range (mark2_count)) + | hb_filter (c->glyph_set, hb_first) + | hb_map (hb_second) + ; + + hb_sorted_vector_t<unsigned> mark2_indexes; + for (const unsigned row : mark2_iter) + { + + hb_range ((unsigned) classCount) + | hb_filter (klass_mapping) + | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; }) + | hb_sink (mark2_indexes) + ; + } + (this+mark2Array).collect_variation_indices (c, mark2_indexes.iter ()); + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+mark1Coverage).collect_coverage (c->input))) return; + if (unlikely (!(this+mark2Coverage).collect_coverage (c->input))) return; + } + + const Coverage &get_coverage () const { return this+mark1Coverage; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + unsigned int mark1_index = (this+mark1Coverage).get_coverage (buffer->cur().codepoint); + if (likely (mark1_index == NOT_COVERED)) return_trace (false); + + /* now we search backwards for a suitable mark glyph until a non-mark glyph */ + hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; + skippy_iter.reset (buffer->idx, 1); + skippy_iter.set_lookup_props (c->lookup_props & ~(uint32_t)LookupFlag::IgnoreFlags); + unsigned unsafe_from; + if (!skippy_iter.prev (&unsafe_from)) + { + buffer->unsafe_to_concat_from_outbuffer (unsafe_from, buffer->idx + 1); + return_trace (false); + } + + if (!_hb_glyph_info_is_mark (&buffer->info[skippy_iter.idx])) + { + buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1); + return_trace (false); + } + + unsigned int j = skippy_iter.idx; + + unsigned int id1 = _hb_glyph_info_get_lig_id (&buffer->cur()); + unsigned int id2 = _hb_glyph_info_get_lig_id (&buffer->info[j]); + unsigned int comp1 = _hb_glyph_info_get_lig_comp (&buffer->cur()); + unsigned int comp2 = _hb_glyph_info_get_lig_comp (&buffer->info[j]); + + if (likely (id1 == id2)) + { + if (id1 == 0) /* Marks belonging to the same base. */ + goto good; + else if (comp1 == comp2) /* Marks belonging to the same ligature component. */ + goto good; + } + else + { + /* If ligature ids don't match, it may be the case that one of the marks + * itself is a ligature. In which case match. */ + if ((id1 > 0 && !comp1) || (id2 > 0 && !comp2)) + goto good; + } + + /* Didn't match. */ + buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1); + return_trace (false); + + good: + unsigned int mark2_index = (this+mark2Coverage).get_coverage (buffer->info[j].codepoint); + if (mark2_index == NOT_COVERED) + { + buffer->unsafe_to_concat_from_outbuffer (skippy_iter.idx, buffer->idx + 1); + return_trace (false); + } + + return_trace ((this+mark1Array).apply (c, mark1_index, mark2_index, this+mark2Array, classCount, j)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + hb_map_t klass_mapping; + Markclass_closure_and_remap_indexes (this+mark1Coverage, this+mark1Array, glyphset, &klass_mapping); + + if (!klass_mapping.get_population ()) return_trace (false); + out->classCount = klass_mapping.get_population (); + + auto mark1_iter = + + hb_zip (this+mark1Coverage, this+mark1Array) + | hb_filter (glyphset, hb_first) + ; + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + mark1_iter + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + + if (!out->mark1Coverage.serialize_serialize (c->serializer, new_coverage.iter ())) + return_trace (false); + + out->mark1Array.serialize_subset (c, mark1Array, this, + (this+mark1Coverage).iter (), + &klass_mapping); + + unsigned mark2count = (this+mark2Array).rows; + auto mark2_iter = + + hb_zip (this+mark2Coverage, hb_range (mark2count)) + | hb_filter (glyphset, hb_first) + ; + + new_coverage.reset (); + + mark2_iter + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + + if (!out->mark2Coverage.serialize_serialize (c->serializer, new_coverage.iter ())) + return_trace (false); + + hb_sorted_vector_t<unsigned> mark2_indexes; + for (const unsigned row : + mark2_iter + | hb_map (hb_second)) + { + + hb_range ((unsigned) classCount) + | hb_filter (klass_mapping) + | hb_map ([&] (const unsigned col) { return row * (unsigned) classCount + col; }) + | hb_sink (mark2_indexes) + ; + } + + out->mark2Array.serialize_subset (c, mark2Array, this, mark2_iter.len (), mark2_indexes.iter ()); + + return_trace (true); + } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_MARKMARKPOSFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/MarkRecord.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkRecord.hh new file mode 100644 index 0000000000..a7d489d2a5 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/MarkRecord.hh @@ -0,0 +1,52 @@ +#ifndef OT_LAYOUT_GPOS_MARKRECORD_HH +#define OT_LAYOUT_GPOS_MARKRECORD_HH + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct MarkRecord +{ + friend struct MarkArray; + + public: + HBUINT16 klass; /* Class defined for this mark */ + Offset16To<Anchor> + markAnchor; /* Offset to Anchor table--from + * beginning of MarkArray table */ + public: + DEFINE_SIZE_STATIC (4); + + unsigned get_class () const { return (unsigned) klass; } + bool sanitize (hb_sanitize_context_t *c, const void *base) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && markAnchor.sanitize (c, base)); + } + + MarkRecord *subset (hb_subset_context_t *c, + const void *src_base, + const hb_map_t *klass_mapping) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->embed (this); + if (unlikely (!out)) return_trace (nullptr); + + out->klass = klass_mapping->get (klass); + out->markAnchor.serialize_subset (c, markAnchor, src_base); + return_trace (out); + } + + void collect_variation_indices (hb_collect_variation_indices_context_t *c, + const void *src_base) const + { + (src_base+markAnchor).collect_variation_indices (c); + } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_MARKRECORD_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/PairPos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/PairPos.hh new file mode 100644 index 0000000000..9823768cbc --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/PairPos.hh @@ -0,0 +1,46 @@ +#ifndef OT_LAYOUT_GPOS_PAIRPOS_HH +#define OT_LAYOUT_GPOS_PAIRPOS_HH + +#include "PairPosFormat1.hh" +#include "PairPosFormat2.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct PairPos +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + PairPosFormat1_3<SmallTypes> format1; + PairPosFormat2_4<SmallTypes> format2; +#ifndef HB_NO_BEYOND_64K + PairPosFormat1_3<MediumTypes> format3; + PairPosFormat2_4<MediumTypes> format4; +#endif + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...)); + case 4: return_trace (c->dispatch (u.format4, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } +}; + +} +} +} + +#endif // OT_LAYOUT_GPOS_PAIRPOS_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/PairPosFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/PairPosFormat1.hh new file mode 100644 index 0000000000..9c9b268889 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/PairPosFormat1.hh @@ -0,0 +1,219 @@ +#ifndef OT_LAYOUT_GPOS_PAIRPOSFORMAT1_HH +#define OT_LAYOUT_GPOS_PAIRPOSFORMAT1_HH + +#include "PairSet.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + + +template <typename Types> +struct PairPosFormat1_3 +{ + using PairSet = GPOS_impl::PairSet<Types>; + using PairValueRecord = GPOS_impl::PairValueRecord<Types>; + + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of subtable */ + ValueFormat valueFormat[2]; /* [0] Defines the types of data in + * ValueRecord1--for the first glyph + * in the pair--may be zero (0) */ + /* [1] Defines the types of data in + * ValueRecord2--for the second glyph + * in the pair--may be zero (0) */ + Array16Of<typename Types::template OffsetTo<PairSet>> + pairSet; /* Array of PairSet tables + * ordered by Coverage Index */ + public: + DEFINE_SIZE_ARRAY (8 + Types::size, pairSet); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + + if (!c->check_struct (this)) return_trace (false); + + unsigned int len1 = valueFormat[0].get_len (); + unsigned int len2 = valueFormat[1].get_len (); + typename PairSet::sanitize_closure_t closure = + { + valueFormat, + len1, + 1 + len1 + len2 + }; + + return_trace (coverage.sanitize (c, this) && pairSet.sanitize (c, this, &closure)); + } + + bool intersects (const hb_set_t *glyphs) const + { + auto &cov = this+coverage; + + if (pairSet.len > glyphs->get_population () * hb_bit_storage ((unsigned) pairSet.len) / 4) + { + for (hb_codepoint_t g = HB_SET_VALUE_INVALID; glyphs->next (&g);) + { + unsigned i = cov.get_coverage (g); + if ((this+pairSet[i]).intersects (glyphs, valueFormat)) + return true; + } + return false; + } + + return + + hb_zip (cov, pairSet) + | hb_filter (*glyphs, hb_first) + | hb_map (hb_second) + | hb_map ([glyphs, this] (const typename Types::template OffsetTo<PairSet> &_) + { return (this+_).intersects (glyphs, valueFormat); }) + | hb_any + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + if ((!valueFormat[0].has_device ()) && (!valueFormat[1].has_device ())) return; + + auto it = + + hb_zip (this+coverage, pairSet) + | hb_filter (c->glyph_set, hb_first) + | hb_map (hb_second) + ; + + if (!it) return; + + it + | hb_map (hb_add (this)) + | hb_apply ([&] (const PairSet& _) { _.collect_variation_indices (c, valueFormat); }) + ; + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + unsigned int count = pairSet.len; + for (unsigned int i = 0; i < count; i++) + (this+pairSet[i]).collect_glyphs (c, valueFormat); + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; + skippy_iter.reset (buffer->idx, 1); + unsigned unsafe_to; + if (!skippy_iter.next (&unsafe_to)) + { + buffer->unsafe_to_concat (buffer->idx, unsafe_to); + return_trace (false); + } + + return_trace ((this+pairSet[index]).apply (c, valueFormat, skippy_iter.idx)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + out->valueFormat[0] = valueFormat[0]; + out->valueFormat[1] = valueFormat[1]; + if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING) + { + hb_pair_t<unsigned, unsigned> newFormats = compute_effective_value_formats (glyphset); + out->valueFormat[0] = newFormats.first; + out->valueFormat[1] = newFormats.second; + } + + if (c->plan->all_axes_pinned) + { + out->valueFormat[0] = out->valueFormat[0].drop_device_table_flags (); + out->valueFormat[1] = out->valueFormat[1].drop_device_table_flags (); + } + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + + hb_zip (this+coverage, pairSet) + | hb_filter (glyphset, hb_first) + | hb_filter ([this, c, out] (const typename Types::template OffsetTo<PairSet>& _) + { + auto snap = c->serializer->snapshot (); + auto *o = out->pairSet.serialize_append (c->serializer); + if (unlikely (!o)) return false; + bool ret = o->serialize_subset (c, _, this, valueFormat, out->valueFormat); + if (!ret) + { + out->pairSet.pop (); + c->serializer->revert (snap); + } + return ret; + }, + hb_second) + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + + out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); + + return_trace (bool (new_coverage)); + } + + + hb_pair_t<unsigned, unsigned> compute_effective_value_formats (const hb_set_t& glyphset) const + { + unsigned len1 = valueFormat[0].get_len (); + unsigned len2 = valueFormat[1].get_len (); + unsigned record_size = HBUINT16::static_size + Value::static_size * (len1 + len2); + + unsigned format1 = 0; + unsigned format2 = 0; + for (const auto & _ : + + hb_zip (this+coverage, pairSet) + | hb_filter (glyphset, hb_first) + | hb_map (hb_second) + ) + { + const PairSet& set = (this + _); + const PairValueRecord *record = &set.firstPairValueRecord; + + unsigned count = set.len; + for (unsigned i = 0; i < count; i++) + { + if (record->intersects (glyphset)) + { + format1 = format1 | valueFormat[0].get_effective_format (record->get_values_1 ()); + format2 = format2 | valueFormat[1].get_effective_format (record->get_values_2 (valueFormat[0])); + } + record = &StructAtOffset<const PairValueRecord> (record, record_size); + } + + if (format1 == valueFormat[0] && format2 == valueFormat[1]) + break; + } + + return hb_pair (format1, format2); + } +}; + + +} +} +} + +#endif // OT_LAYOUT_GPOS_PAIRPOSFORMAT1_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/PairPosFormat2.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/PairPosFormat2.hh new file mode 100644 index 0000000000..9c87ac2b03 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/PairPosFormat2.hh @@ -0,0 +1,351 @@ +#ifndef OT_LAYOUT_GPOS_PAIRPOSFORMAT2_HH +#define OT_LAYOUT_GPOS_PAIRPOSFORMAT2_HH + +#include "ValueFormat.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +template <typename Types> +struct PairPosFormat2_4 +{ + protected: + HBUINT16 format; /* Format identifier--format = 2 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of subtable */ + ValueFormat valueFormat1; /* ValueRecord definition--for the + * first glyph of the pair--may be zero + * (0) */ + ValueFormat valueFormat2; /* ValueRecord definition--for the + * second glyph of the pair--may be + * zero (0) */ + typename Types::template OffsetTo<ClassDef> + classDef1; /* Offset to ClassDef table--from + * beginning of PairPos subtable--for + * the first glyph of the pair */ + typename Types::template OffsetTo<ClassDef> + classDef2; /* Offset to ClassDef table--from + * beginning of PairPos subtable--for + * the second glyph of the pair */ + HBUINT16 class1Count; /* Number of classes in ClassDef1 + * table--includes Class0 */ + HBUINT16 class2Count; /* Number of classes in ClassDef2 + * table--includes Class0 */ + ValueRecord values; /* Matrix of value pairs: + * class1-major, class2-minor, + * Each entry has value1 and value2 */ + public: + DEFINE_SIZE_ARRAY (10 + 3 * Types::size, values); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (!(c->check_struct (this) + && coverage.sanitize (c, this) + && classDef1.sanitize (c, this) + && classDef2.sanitize (c, this))) return_trace (false); + + unsigned int len1 = valueFormat1.get_len (); + unsigned int len2 = valueFormat2.get_len (); + unsigned int stride = len1 + len2; + unsigned int record_size = valueFormat1.get_size () + valueFormat2.get_size (); + unsigned int count = (unsigned int) class1Count * (unsigned int) class2Count; + return_trace (c->check_range ((const void *) values, + count, + record_size) && + valueFormat1.sanitize_values_stride_unsafe (c, this, &values[0], count, stride) && + valueFormat2.sanitize_values_stride_unsafe (c, this, &values[len1], count, stride)); + } + + bool intersects (const hb_set_t *glyphs) const + { + return (this+coverage).intersects (glyphs) && + (this+classDef2).intersects (glyphs); + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + if (!intersects (c->glyph_set)) return; + if ((!valueFormat1.has_device ()) && (!valueFormat2.has_device ())) return; + + hb_set_t klass1_glyphs, klass2_glyphs; + if (!(this+classDef1).collect_coverage (&klass1_glyphs)) return; + if (!(this+classDef2).collect_coverage (&klass2_glyphs)) return; + + hb_set_t class1_set, class2_set; + for (const unsigned cp : + c->glyph_set->iter () | hb_filter (this + coverage)) + { + if (!klass1_glyphs.has (cp)) class1_set.add (0); + else + { + unsigned klass1 = (this+classDef1).get (cp); + class1_set.add (klass1); + } + } + + class2_set.add (0); + for (const unsigned cp : + c->glyph_set->iter () | hb_filter (klass2_glyphs)) + { + unsigned klass2 = (this+classDef2).get (cp); + class2_set.add (klass2); + } + + if (class1_set.is_empty () + || class2_set.is_empty () + || (class2_set.get_population() == 1 && class2_set.has(0))) + return; + + unsigned len1 = valueFormat1.get_len (); + unsigned len2 = valueFormat2.get_len (); + const hb_array_t<const Value> values_array = values.as_array ((unsigned)class1Count * (unsigned) class2Count * (len1 + len2)); + for (const unsigned class1_idx : class1_set.iter ()) + { + for (const unsigned class2_idx : class2_set.iter ()) + { + unsigned start_offset = (class1_idx * (unsigned) class2Count + class2_idx) * (len1 + len2); + if (valueFormat1.has_device ()) + valueFormat1.collect_variation_indices (c, this, values_array.sub_array (start_offset, len1)); + + if (valueFormat2.has_device ()) + valueFormat2.collect_variation_indices (c, this, values_array.sub_array (start_offset+len1, len2)); + } + } + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + if (unlikely (!(this+classDef2).collect_coverage (c->input))) return; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + hb_ot_apply_context_t::skipping_iterator_t &skippy_iter = c->iter_input; + skippy_iter.reset (buffer->idx, 1); + unsigned unsafe_to; + if (!skippy_iter.next (&unsafe_to)) + { + buffer->unsafe_to_concat (buffer->idx, unsafe_to); + return_trace (false); + } + + unsigned int len1 = valueFormat1.get_len (); + unsigned int len2 = valueFormat2.get_len (); + unsigned int record_len = len1 + len2; + + unsigned int klass1 = (this+classDef1).get_class (buffer->cur().codepoint); + unsigned int klass2 = (this+classDef2).get_class (buffer->info[skippy_iter.idx].codepoint); + if (unlikely (klass1 >= class1Count || klass2 >= class2Count)) + { + buffer->unsafe_to_concat (buffer->idx, skippy_iter.idx + 1); + return_trace (false); + } + + const Value *v = &values[record_len * (klass1 * class2Count + klass2)]; + + bool applied_first = false, applied_second = false; + + + /* Isolate simple kerning and apply it half to each side. + * Results in better cursor positinoing / underline drawing. + * + * Disabled, because causes issues... :-( + * https://github.com/harfbuzz/harfbuzz/issues/3408 + * https://github.com/harfbuzz/harfbuzz/pull/3235#issuecomment-1029814978 + */ +#ifndef HB_SPLIT_KERN + if (0) +#endif + { + if (!len2) + { + const hb_direction_t dir = buffer->props.direction; + const bool horizontal = HB_DIRECTION_IS_HORIZONTAL (dir); + const bool backward = HB_DIRECTION_IS_BACKWARD (dir); + unsigned mask = horizontal ? ValueFormat::xAdvance : ValueFormat::yAdvance; + if (backward) + mask |= mask >> 2; /* Add eg. xPlacement in RTL. */ + /* Add Devices. */ + mask |= mask << 4; + + if (valueFormat1 & ~mask) + goto bail; + + /* Is simple kern. Apply value on an empty position slot, + * then split it between sides. */ + + hb_glyph_position_t pos{}; + if (valueFormat1.apply_value (c, this, v, pos)) + { + hb_position_t *src = &pos.x_advance; + hb_position_t *dst1 = &buffer->cur_pos().x_advance; + hb_position_t *dst2 = &buffer->pos[skippy_iter.idx].x_advance; + unsigned i = horizontal ? 0 : 1; + + hb_position_t kern = src[i]; + hb_position_t kern1 = kern >> 1; + hb_position_t kern2 = kern - kern1; + + if (!backward) + { + dst1[i] += kern1; + dst2[i] += kern2; + dst2[i + 2] += kern2; + } + else + { + dst1[i] += kern1; + dst1[i + 2] += src[i + 2] - kern2; + dst2[i] += kern2; + } + + applied_first = applied_second = kern != 0; + goto success; + } + goto boring; + } + } + bail: + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "try kerning glyphs at %d,%d", + c->buffer->idx, skippy_iter.idx); + } + + applied_first = valueFormat1.apply_value (c, this, v, buffer->cur_pos()); + applied_second = valueFormat2.apply_value (c, this, v + len1, buffer->pos[skippy_iter.idx]); + + if (applied_first || applied_second) + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "kerned glyphs at %d,%d", + c->buffer->idx, skippy_iter.idx); + } + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "tried kerning glyphs at %d,%d", + c->buffer->idx, skippy_iter.idx); + } + + success: + if (applied_first || applied_second) + buffer->unsafe_to_break (buffer->idx, skippy_iter.idx + 1); + else + boring: + buffer->unsafe_to_concat (buffer->idx, skippy_iter.idx + 1); + + if (len2) + { + skippy_iter.idx++; + // https://github.com/harfbuzz/harfbuzz/issues/3824 + // https://github.com/harfbuzz/harfbuzz/issues/3888#issuecomment-1326781116 + buffer->unsafe_to_break (buffer->idx, skippy_iter.idx + 1); + } + + buffer->idx = skippy_iter.idx; + + return_trace (true); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + hb_map_t klass1_map; + out->classDef1.serialize_subset (c, classDef1, this, &klass1_map, true, true, &(this + coverage)); + out->class1Count = klass1_map.get_population (); + + hb_map_t klass2_map; + out->classDef2.serialize_subset (c, classDef2, this, &klass2_map, true, false); + out->class2Count = klass2_map.get_population (); + + unsigned len1 = valueFormat1.get_len (); + unsigned len2 = valueFormat2.get_len (); + + hb_pair_t<unsigned, unsigned> newFormats = hb_pair (valueFormat1, valueFormat2); + if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING) + newFormats = compute_effective_value_formats (klass1_map, klass2_map); + + out->valueFormat1 = newFormats.first; + out->valueFormat2 = newFormats.second; + + if (c->plan->all_axes_pinned) + { + out->valueFormat1 = out->valueFormat1.drop_device_table_flags (); + out->valueFormat2 = out->valueFormat2.drop_device_table_flags (); + } + + for (unsigned class1_idx : + hb_range ((unsigned) class1Count) | hb_filter (klass1_map)) + { + for (unsigned class2_idx : + hb_range ((unsigned) class2Count) | hb_filter (klass2_map)) + { + unsigned idx = (class1_idx * (unsigned) class2Count + class2_idx) * (len1 + len2); + valueFormat1.copy_values (c->serializer, out->valueFormat1, this, &values[idx], c->plan->layout_variation_idx_delta_map); + valueFormat2.copy_values (c->serializer, out->valueFormat2, this, &values[idx + len1], c->plan->layout_variation_idx_delta_map); + } + } + + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto it = + + hb_iter (this+coverage) + | hb_filter (glyphset) + | hb_map_retains_sorting (glyph_map) + ; + + out->coverage.serialize_serialize (c->serializer, it); + return_trace (out->class1Count && out->class2Count && bool (it)); + } + + + hb_pair_t<unsigned, unsigned> compute_effective_value_formats (const hb_map_t& klass1_map, + const hb_map_t& klass2_map) const + { + unsigned len1 = valueFormat1.get_len (); + unsigned len2 = valueFormat2.get_len (); + unsigned record_size = len1 + len2; + + unsigned format1 = 0; + unsigned format2 = 0; + + for (unsigned class1_idx : + hb_range ((unsigned) class1Count) | hb_filter (klass1_map)) + { + for (unsigned class2_idx : + hb_range ((unsigned) class2Count) | hb_filter (klass2_map)) + { + unsigned idx = (class1_idx * (unsigned) class2Count + class2_idx) * record_size; + format1 = format1 | valueFormat1.get_effective_format (&values[idx]); + format2 = format2 | valueFormat2.get_effective_format (&values[idx + len1]); + } + + if (format1 == valueFormat1 && format2 == valueFormat2) + break; + } + + return hb_pair (format1, format2); + } +}; + +} +} +} + +#endif // OT_LAYOUT_GPOS_PAIRPOSFORMAT2_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/PairSet.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/PairSet.hh new file mode 100644 index 0000000000..a318f39913 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/PairSet.hh @@ -0,0 +1,203 @@ +#ifndef OT_LAYOUT_GPOS_PAIRSET_HH +#define OT_LAYOUT_GPOS_PAIRSET_HH + +#include "PairValueRecord.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + + +template <typename Types> +struct PairSet +{ + template <typename Types2> + friend struct PairPosFormat1_3; + + using PairValueRecord = GPOS_impl::PairValueRecord<Types>; + + protected: + HBUINT16 len; /* Number of PairValueRecords */ + PairValueRecord firstPairValueRecord; + /* Array of PairValueRecords--ordered + * by GlyphID of the second glyph */ + public: + DEFINE_SIZE_MIN (2); + + struct sanitize_closure_t + { + const ValueFormat *valueFormats; + unsigned int len1; /* valueFormats[0].get_len() */ + unsigned int stride; /* 1 + len1 + len2 */ + }; + + bool sanitize (hb_sanitize_context_t *c, const sanitize_closure_t *closure) const + { + TRACE_SANITIZE (this); + if (!(c->check_struct (this) + && c->check_range (&firstPairValueRecord, + len, + HBUINT16::static_size, + closure->stride))) return_trace (false); + + unsigned int count = len; + const PairValueRecord *record = &firstPairValueRecord; + return_trace (closure->valueFormats[0].sanitize_values_stride_unsafe (c, this, &record->values[0], count, closure->stride) && + closure->valueFormats[1].sanitize_values_stride_unsafe (c, this, &record->values[closure->len1], count, closure->stride)); + } + + bool intersects (const hb_set_t *glyphs, + const ValueFormat *valueFormats) const + { + unsigned int len1 = valueFormats[0].get_len (); + unsigned int len2 = valueFormats[1].get_len (); + unsigned int record_size = HBUINT16::static_size * (1 + len1 + len2); + + const PairValueRecord *record = &firstPairValueRecord; + unsigned int count = len; + for (unsigned int i = 0; i < count; i++) + { + if (glyphs->has (record->secondGlyph)) + return true; + record = &StructAtOffset<const PairValueRecord> (record, record_size); + } + return false; + } + + void collect_glyphs (hb_collect_glyphs_context_t *c, + const ValueFormat *valueFormats) const + { + unsigned int len1 = valueFormats[0].get_len (); + unsigned int len2 = valueFormats[1].get_len (); + unsigned int record_size = HBUINT16::static_size * (1 + len1 + len2); + + const PairValueRecord *record = &firstPairValueRecord; + c->input->add_array (&record->secondGlyph, len, record_size); + } + + void collect_variation_indices (hb_collect_variation_indices_context_t *c, + const ValueFormat *valueFormats) const + { + unsigned len1 = valueFormats[0].get_len (); + unsigned len2 = valueFormats[1].get_len (); + unsigned record_size = HBUINT16::static_size * (1 + len1 + len2); + + const PairValueRecord *record = &firstPairValueRecord; + unsigned count = len; + for (unsigned i = 0; i < count; i++) + { + if (c->glyph_set->has (record->secondGlyph)) + { record->collect_variation_indices (c, valueFormats, this); } + + record = &StructAtOffset<const PairValueRecord> (record, record_size); + } + } + + bool apply (hb_ot_apply_context_t *c, + const ValueFormat *valueFormats, + unsigned int pos) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + unsigned int len1 = valueFormats[0].get_len (); + unsigned int len2 = valueFormats[1].get_len (); + unsigned int record_size = HBUINT16::static_size * (1 + len1 + len2); + + const PairValueRecord *record = hb_bsearch (buffer->info[pos].codepoint, + &firstPairValueRecord, + len, + record_size); + if (record) + { + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "try kerning glyphs at %d,%d", + c->buffer->idx, pos); + } + + bool applied_first = valueFormats[0].apply_value (c, this, &record->values[0], buffer->cur_pos()); + bool applied_second = valueFormats[1].apply_value (c, this, &record->values[len1], buffer->pos[pos]); + + if (applied_first || applied_second) + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "kerned glyphs at %d,%d", + c->buffer->idx, pos); + } + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "tried kerning glyphs at %d,%d", + c->buffer->idx, pos); + } + + if (applied_first || applied_second) + buffer->unsafe_to_break (buffer->idx, pos + 1); + + if (len2) + { + pos++; + // https://github.com/harfbuzz/harfbuzz/issues/3824 + // https://github.com/harfbuzz/harfbuzz/issues/3888#issuecomment-1326781116 + buffer->unsafe_to_break (buffer->idx, pos + 1); + } + + buffer->idx = pos; + return_trace (true); + } + buffer->unsafe_to_concat (buffer->idx, pos + 1); + return_trace (false); + } + + bool subset (hb_subset_context_t *c, + const ValueFormat valueFormats[2], + const ValueFormat newFormats[2]) const + { + TRACE_SUBSET (this); + auto snap = c->serializer->snapshot (); + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->len = 0; + + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + unsigned len1 = valueFormats[0].get_len (); + unsigned len2 = valueFormats[1].get_len (); + unsigned record_size = HBUINT16::static_size + Value::static_size * (len1 + len2); + + typename PairValueRecord::context_t context = + { + this, + valueFormats, + newFormats, + len1, + &glyph_map, + c->plan->layout_variation_idx_delta_map + }; + + const PairValueRecord *record = &firstPairValueRecord; + unsigned count = len, num = 0; + for (unsigned i = 0; i < count; i++) + { + if (glyphset.has (record->secondGlyph) + && record->subset (c, &context)) num++; + record = &StructAtOffset<const PairValueRecord> (record, record_size); + } + + out->len = num; + if (!num) c->serializer->revert (snap); + return_trace (num); + } +}; + + +} +} +} + +#endif // OT_LAYOUT_GPOS_PAIRSET_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/PairValueRecord.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/PairValueRecord.hh new file mode 100644 index 0000000000..3222477764 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/PairValueRecord.hh @@ -0,0 +1,99 @@ +#ifndef OT_LAYOUT_GPOS_PAIRVALUERECORD_HH +#define OT_LAYOUT_GPOS_PAIRVALUERECORD_HH + +#include "ValueFormat.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + + +template <typename Types> +struct PairValueRecord +{ + template <typename Types2> + friend struct PairSet; + + protected: + typename Types::HBGlyphID + secondGlyph; /* GlyphID of second glyph in the + * pair--first glyph is listed in the + * Coverage table */ + ValueRecord values; /* Positioning data for the first glyph + * followed by for second glyph */ + public: + DEFINE_SIZE_ARRAY (Types::size, values); + + int cmp (hb_codepoint_t k) const + { return secondGlyph.cmp (k); } + + struct context_t + { + const void *base; + const ValueFormat *valueFormats; + const ValueFormat *newFormats; + unsigned len1; /* valueFormats[0].get_len() */ + const hb_map_t *glyph_map; + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map; + }; + + bool subset (hb_subset_context_t *c, + context_t *closure) const + { + TRACE_SERIALIZE (this); + auto *s = c->serializer; + auto *out = s->start_embed (*this); + if (unlikely (!s->extend_min (out))) return_trace (false); + + out->secondGlyph = (*closure->glyph_map)[secondGlyph]; + + closure->valueFormats[0].copy_values (s, + closure->newFormats[0], + closure->base, &values[0], + closure->layout_variation_idx_delta_map); + closure->valueFormats[1].copy_values (s, + closure->newFormats[1], + closure->base, + &values[closure->len1], + closure->layout_variation_idx_delta_map); + + return_trace (true); + } + + void collect_variation_indices (hb_collect_variation_indices_context_t *c, + const ValueFormat *valueFormats, + const void *base) const + { + unsigned record1_len = valueFormats[0].get_len (); + unsigned record2_len = valueFormats[1].get_len (); + const hb_array_t<const Value> values_array = values.as_array (record1_len + record2_len); + + if (valueFormats[0].has_device ()) + valueFormats[0].collect_variation_indices (c, base, values_array.sub_array (0, record1_len)); + + if (valueFormats[1].has_device ()) + valueFormats[1].collect_variation_indices (c, base, values_array.sub_array (record1_len, record2_len)); + } + + bool intersects (const hb_set_t& glyphset) const + { + return glyphset.has(secondGlyph); + } + + const Value* get_values_1 () const + { + return &values[0]; + } + + const Value* get_values_2 (ValueFormat format1) const + { + return &values[format1.get_len ()]; + } +}; + + +} +} +} + +#endif // OT_LAYOUT_GPOS_PAIRVALUERECORD_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/PosLookup.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/PosLookup.hh new file mode 100644 index 0000000000..c4e57bb543 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/PosLookup.hh @@ -0,0 +1,79 @@ +#ifndef OT_LAYOUT_GPOS_POSLOOKUP_HH +#define OT_LAYOUT_GPOS_POSLOOKUP_HH + +#include "PosLookupSubTable.hh" +#include "../../../hb-ot-layout-common.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct PosLookup : Lookup +{ + using SubTable = PosLookupSubTable; + + const SubTable& get_subtable (unsigned int i) const + { return Lookup::get_subtable<SubTable> (i); } + + bool is_reverse () const + { + return false; + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + return_trace (dispatch (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { + hb_intersects_context_t c (glyphs); + return dispatch (&c); + } + + hb_collect_glyphs_context_t::return_t collect_glyphs (hb_collect_glyphs_context_t *c) const + { return dispatch (c); } + + hb_closure_lookups_context_t::return_t closure_lookups (hb_closure_lookups_context_t *c, unsigned this_index) const + { + if (c->is_lookup_visited (this_index)) + return hb_closure_lookups_context_t::default_return_value (); + + c->set_lookup_visited (this_index); + if (!intersects (c->glyphs)) + { + c->set_lookup_inactive (this_index); + return hb_closure_lookups_context_t::default_return_value (); + } + + hb_closure_lookups_context_t::return_t ret = dispatch (c); + return ret; + } + + template <typename set_t> + void collect_coverage (set_t *glyphs) const + { + hb_collect_coverage_context_t<set_t> c (glyphs); + dispatch (&c); + } + + template <typename context_t> + static typename context_t::return_t dispatch_recurse_func (context_t *c, unsigned int lookup_index); + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { return Lookup::dispatch<SubTable> (c, std::forward<Ts> (ds)...); } + + bool subset (hb_subset_context_t *c) const + { return Lookup::subset<SubTable> (c); } + + bool sanitize (hb_sanitize_context_t *c) const + { return Lookup::sanitize<SubTable> (c); } +}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_POSLOOKUP_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/PosLookupSubTable.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/PosLookupSubTable.hh new file mode 100644 index 0000000000..c19fbc323f --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/PosLookupSubTable.hh @@ -0,0 +1,79 @@ +#ifndef OT_LAYOUT_GPOS_POSLOOKUPSUBTABLE_HH +#define OT_LAYOUT_GPOS_POSLOOKUPSUBTABLE_HH + +#include "SinglePos.hh" +#include "PairPos.hh" +#include "CursivePos.hh" +#include "MarkBasePos.hh" +#include "MarkLigPos.hh" +#include "MarkMarkPos.hh" +#include "ContextPos.hh" +#include "ChainContextPos.hh" +#include "ExtensionPos.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct PosLookupSubTable +{ + friend struct ::OT::Lookup; + friend struct PosLookup; + + enum Type { + Single = 1, + Pair = 2, + Cursive = 3, + MarkBase = 4, + MarkLig = 5, + MarkMark = 6, + Context = 7, + ChainContext = 8, + Extension = 9 + }; + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type, Ts&&... ds) const + { + TRACE_DISPATCH (this, lookup_type); + switch (lookup_type) { + case Single: return_trace (u.single.dispatch (c, std::forward<Ts> (ds)...)); + case Pair: return_trace (u.pair.dispatch (c, std::forward<Ts> (ds)...)); + case Cursive: return_trace (u.cursive.dispatch (c, std::forward<Ts> (ds)...)); + case MarkBase: return_trace (u.markBase.dispatch (c, std::forward<Ts> (ds)...)); + case MarkLig: return_trace (u.markLig.dispatch (c, std::forward<Ts> (ds)...)); + case MarkMark: return_trace (u.markMark.dispatch (c, std::forward<Ts> (ds)...)); + case Context: return_trace (u.context.dispatch (c, std::forward<Ts> (ds)...)); + case ChainContext: return_trace (u.chainContext.dispatch (c, std::forward<Ts> (ds)...)); + case Extension: return_trace (u.extension.dispatch (c, std::forward<Ts> (ds)...)); + default: return_trace (c->default_return_value ()); + } + } + + bool intersects (const hb_set_t *glyphs, unsigned int lookup_type) const + { + hb_intersects_context_t c (glyphs); + return dispatch (&c, lookup_type); + } + + protected: + union { + SinglePos single; + PairPos pair; + CursivePos cursive; + MarkBasePos markBase; + MarkLigPos markLig; + MarkMarkPos markMark; + ContextPos context; + ChainContextPos chainContext; + ExtensionPos extension; + } u; + public: + DEFINE_SIZE_MIN (0); +}; + +} +} +} + +#endif /* HB_OT_LAYOUT_GPOS_POSLOOKUPSUBTABLE_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePos.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePos.hh new file mode 100644 index 0000000000..6dce3e6343 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePos.hh @@ -0,0 +1,100 @@ +#ifndef OT_LAYOUT_GPOS_SINGLEPOS_HH +#define OT_LAYOUT_GPOS_SINGLEPOS_HH + +#include "SinglePosFormat1.hh" +#include "SinglePosFormat2.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct SinglePos +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + SinglePosFormat1 format1; + SinglePosFormat2 format2; + } u; + + public: + template<typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + unsigned get_format (Iterator glyph_val_iter_pairs) + { + hb_array_t<const Value> first_val_iter = hb_second (*glyph_val_iter_pairs); + + for (const auto iter : glyph_val_iter_pairs) + for (const auto _ : hb_zip (iter.second, first_val_iter)) + if (_.first != _.second) + return 2; + + return 1; + } + + template<typename Iterator, + typename SrcLookup, + hb_requires (hb_is_iterator (Iterator))> + void serialize (hb_serialize_context_t *c, + const SrcLookup* src, + Iterator glyph_val_iter_pairs, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map, + bool all_axes_pinned) + { + if (unlikely (!c->extend_min (u.format))) return; + unsigned format = 2; + ValueFormat new_format = src->get_value_format (); + + if (all_axes_pinned) + new_format = new_format.drop_device_table_flags (); + + if (glyph_val_iter_pairs) + format = get_format (glyph_val_iter_pairs); + + u.format = format; + switch (u.format) { + case 1: u.format1.serialize (c, + src, + glyph_val_iter_pairs, + new_format, + layout_variation_idx_delta_map); + return; + case 2: u.format2.serialize (c, + src, + glyph_val_iter_pairs, + new_format, + layout_variation_idx_delta_map); + return; + default:return; + } + } + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); + default:return_trace (c->default_return_value ()); + } + } +}; + + +template<typename Iterator, typename SrcLookup> +static void +SinglePos_serialize (hb_serialize_context_t *c, + const SrcLookup *src, + Iterator it, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map, + bool all_axes_pinned) +{ c->start_embed<SinglePos> ()->serialize (c, src, it, layout_variation_idx_delta_map, all_axes_pinned); } + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_SINGLEPOS_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat1.hh new file mode 100644 index 0000000000..b4c9fc3db0 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat1.hh @@ -0,0 +1,156 @@ +#ifndef OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH +#define OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH + +#include "Common.hh" +#include "ValueFormat.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct SinglePosFormat1 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + Offset16To<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of subtable */ + ValueFormat valueFormat; /* Defines the types of data in the + * ValueRecord */ + ValueRecord values; /* Defines positioning + * value(s)--applied to all glyphs in + * the Coverage table */ + public: + DEFINE_SIZE_ARRAY (6, values); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + coverage.sanitize (c, this) && + valueFormat.sanitize_value (c, this, values)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + if (!valueFormat.has_device ()) return; + + hb_set_t intersection; + (this+coverage).intersect_set (*c->glyph_set, intersection); + if (!intersection) return; + + valueFormat.collect_variation_indices (c, this, values.as_array (valueFormat.get_len ())); + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; } + + const Coverage &get_coverage () const { return this+coverage; } + + ValueFormat get_value_format () const { return valueFormat; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "positioning glyph at %d", + c->buffer->idx); + } + + valueFormat.apply_value (c, this, values, buffer->cur_pos()); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "positioned glyph at %d", + c->buffer->idx); + } + + buffer->idx++; + return_trace (true); + } + + bool + position_single (hb_font_t *font, + hb_direction_t direction, + hb_codepoint_t gid, + hb_glyph_position_t &pos) const + { + unsigned int index = (this+coverage).get_coverage (gid); + if (likely (index == NOT_COVERED)) return false; + + /* This is ugly... */ + hb_buffer_t buffer; + buffer.props.direction = direction; + OT::hb_ot_apply_context_t c (1, font, &buffer); + + valueFormat.apply_value (&c, this, values, pos); + return true; + } + + template<typename Iterator, + typename SrcLookup, + hb_requires (hb_is_iterator (Iterator))> + void serialize (hb_serialize_context_t *c, + const SrcLookup *src, + Iterator it, + ValueFormat newFormat, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map) + { + if (unlikely (!c->extend_min (this))) return; + if (unlikely (!c->check_assign (valueFormat, + newFormat, + HB_SERIALIZE_ERROR_INT_OVERFLOW))) return; + + for (const hb_array_t<const Value>& _ : + it | hb_map (hb_second)) + { + src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_delta_map); + // Only serialize the first entry in the iterator, the rest are assumed to + // be the same. + break; + } + + auto glyphs = + + it + | hb_map_retains_sorting (hb_first) + ; + + coverage.serialize_serialize (c, glyphs); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + hb_set_t intersection; + (this+coverage).intersect_set (glyphset, intersection); + + auto it = + + hb_iter (intersection) + | hb_map_retains_sorting (glyph_map) + | hb_zip (hb_repeat (values.as_array (valueFormat.get_len ()))) + ; + + bool ret = bool (it); + SinglePos_serialize (c->serializer, this, it, c->plan->layout_variation_idx_delta_map, c->plan->all_axes_pinned); + return_trace (ret); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GPOS_SINGLEPOSFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat2.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat2.hh new file mode 100644 index 0000000000..c77951156b --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat2.hh @@ -0,0 +1,176 @@ +#ifndef OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH +#define OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +struct SinglePosFormat2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 2 */ + Offset16To<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of subtable */ + ValueFormat valueFormat; /* Defines the types of data in the + * ValueRecord */ + HBUINT16 valueCount; /* Number of ValueRecords */ + ValueRecord values; /* Array of ValueRecords--positioning + * values applied to glyphs */ + public: + DEFINE_SIZE_ARRAY (8, values); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + coverage.sanitize (c, this) && + valueFormat.sanitize_values (c, this, values, valueCount)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + void collect_variation_indices (hb_collect_variation_indices_context_t *c) const + { + if (!valueFormat.has_device ()) return; + + auto it = + + hb_zip (this+coverage, hb_range ((unsigned) valueCount)) + | hb_filter (c->glyph_set, hb_first) + ; + + if (!it) return; + + unsigned sub_length = valueFormat.get_len (); + const hb_array_t<const Value> values_array = values.as_array (valueCount * sub_length); + + for (unsigned i : + it + | hb_map (hb_second)) + valueFormat.collect_variation_indices (c, this, values_array.sub_array (i * sub_length, sub_length)); + + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { if (unlikely (!(this+coverage).collect_coverage (c->input))) return; } + + const Coverage &get_coverage () const { return this+coverage; } + + ValueFormat get_value_format () const { return valueFormat; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_buffer_t *buffer = c->buffer; + unsigned int index = (this+coverage).get_coverage (buffer->cur().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + if (unlikely (index >= valueCount)) return_trace (false); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "positioning glyph at %d", + c->buffer->idx); + } + + valueFormat.apply_value (c, this, + &values[index * valueFormat.get_len ()], + buffer->cur_pos()); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "positioned glyph at %d", + c->buffer->idx); + } + + buffer->idx++; + return_trace (true); + } + + bool + position_single (hb_font_t *font, + hb_direction_t direction, + hb_codepoint_t gid, + hb_glyph_position_t &pos) const + { + unsigned int index = (this+coverage).get_coverage (gid); + if (likely (index == NOT_COVERED)) return false; + if (unlikely (index >= valueCount)) return false; + + /* This is ugly... */ + hb_buffer_t buffer; + buffer.props.direction = direction; + OT::hb_ot_apply_context_t c (1, font, &buffer); + + valueFormat.apply_value (&c, this, + &values[index * valueFormat.get_len ()], + pos); + return true; + } + + + template<typename Iterator, + typename SrcLookup, + hb_requires (hb_is_iterator (Iterator))> + void serialize (hb_serialize_context_t *c, + const SrcLookup *src, + Iterator it, + ValueFormat newFormat, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map) + { + auto out = c->extend_min (this); + if (unlikely (!out)) return; + if (unlikely (!c->check_assign (valueFormat, newFormat, HB_SERIALIZE_ERROR_INT_OVERFLOW))) return; + if (unlikely (!c->check_assign (valueCount, it.len (), HB_SERIALIZE_ERROR_ARRAY_OVERFLOW))) return; + + + it + | hb_map (hb_second) + | hb_apply ([&] (hb_array_t<const Value> _) + { src->get_value_format ().copy_values (c, newFormat, src, &_, layout_variation_idx_delta_map); }) + ; + + auto glyphs = + + it + | hb_map_retains_sorting (hb_first) + ; + + coverage.serialize_serialize (c, glyphs); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + unsigned sub_length = valueFormat.get_len (); + auto values_array = values.as_array (valueCount * sub_length); + + auto it = + + hb_zip (this+coverage, hb_range ((unsigned) valueCount)) + | hb_filter (glyphset, hb_first) + | hb_map_retains_sorting ([&] (const hb_pair_t<hb_codepoint_t, unsigned>& _) + { + return hb_pair (glyph_map[_.first], + values_array.sub_array (_.second * sub_length, + sub_length)); + }) + ; + + bool ret = bool (it); + SinglePos_serialize (c->serializer, this, it, c->plan->layout_variation_idx_delta_map, c->plan->all_axes_pinned); + return_trace (ret); + } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GPOS_SINGLEPOSFORMAT2_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GPOS/ValueFormat.hh b/gfx/harfbuzz/src/OT/Layout/GPOS/ValueFormat.hh new file mode 100644 index 0000000000..26a40f01a3 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GPOS/ValueFormat.hh @@ -0,0 +1,394 @@ +#ifndef OT_LAYOUT_GPOS_VALUEFORMAT_HH +#define OT_LAYOUT_GPOS_VALUEFORMAT_HH + +#include "../../../hb-ot-layout-gsubgpos.hh" + +namespace OT { +namespace Layout { +namespace GPOS_impl { + +typedef HBUINT16 Value; + +typedef UnsizedArrayOf<Value> ValueRecord; + +struct ValueFormat : HBUINT16 +{ + enum Flags { + xPlacement = 0x0001u, /* Includes horizontal adjustment for placement */ + yPlacement = 0x0002u, /* Includes vertical adjustment for placement */ + xAdvance = 0x0004u, /* Includes horizontal adjustment for advance */ + yAdvance = 0x0008u, /* Includes vertical adjustment for advance */ + xPlaDevice = 0x0010u, /* Includes horizontal Device table for placement */ + yPlaDevice = 0x0020u, /* Includes vertical Device table for placement */ + xAdvDevice = 0x0040u, /* Includes horizontal Device table for advance */ + yAdvDevice = 0x0080u, /* Includes vertical Device table for advance */ + ignored = 0x0F00u, /* Was used in TrueType Open for MM fonts */ + reserved = 0xF000u, /* For future use */ + + devices = 0x00F0u /* Mask for having any Device table */ + }; + +/* All fields are options. Only those available advance the value pointer. */ +#if 0 + HBINT16 xPlacement; /* Horizontal adjustment for + * placement--in design units */ + HBINT16 yPlacement; /* Vertical adjustment for + * placement--in design units */ + HBINT16 xAdvance; /* Horizontal adjustment for + * advance--in design units (only used + * for horizontal writing) */ + HBINT16 yAdvance; /* Vertical adjustment for advance--in + * design units (only used for vertical + * writing) */ + Offset16To<Device> xPlaDevice; /* Offset to Device table for + * horizontal placement--measured from + * beginning of PosTable (may be NULL) */ + Offset16To<Device> yPlaDevice; /* Offset to Device table for vertical + * placement--measured from beginning + * of PosTable (may be NULL) */ + Offset16To<Device> xAdvDevice; /* Offset to Device table for + * horizontal advance--measured from + * beginning of PosTable (may be NULL) */ + Offset16To<Device> yAdvDevice; /* Offset to Device table for vertical + * advance--measured from beginning of + * PosTable (may be NULL) */ +#endif + + IntType& operator = (uint16_t i) { v = i; return *this; } + + unsigned int get_len () const { return hb_popcount ((unsigned int) *this); } + unsigned int get_size () const { return get_len () * Value::static_size; } + + hb_vector_t<unsigned> get_device_table_indices () const { + unsigned i = 0; + hb_vector_t<unsigned> result; + unsigned format = *this; + + if (format & xPlacement) i++; + if (format & yPlacement) i++; + if (format & xAdvance) i++; + if (format & yAdvance) i++; + + if (format & xPlaDevice) result.push (i++); + if (format & yPlaDevice) result.push (i++); + if (format & xAdvDevice) result.push (i++); + if (format & yAdvDevice) result.push (i++); + + return result; + } + + bool apply_value (hb_ot_apply_context_t *c, + const void *base, + const Value *values, + hb_glyph_position_t &glyph_pos) const + { + bool ret = false; + unsigned int format = *this; + if (!format) return ret; + + hb_font_t *font = c->font; + bool horizontal = +#ifndef HB_NO_VERTICAL + HB_DIRECTION_IS_HORIZONTAL (c->direction) +#else + true +#endif + ; + + if (format & xPlacement) glyph_pos.x_offset += font->em_scale_x (get_short (values++, &ret)); + if (format & yPlacement) glyph_pos.y_offset += font->em_scale_y (get_short (values++, &ret)); + if (format & xAdvance) { + if (likely (horizontal)) glyph_pos.x_advance += font->em_scale_x (get_short (values, &ret)); + values++; + } + /* y_advance values grow downward but font-space grows upward, hence negation */ + if (format & yAdvance) { + if (unlikely (!horizontal)) glyph_pos.y_advance -= font->em_scale_y (get_short (values, &ret)); + values++; + } + + if (!has_device ()) return ret; + + bool use_x_device = font->x_ppem || font->num_coords; + bool use_y_device = font->y_ppem || font->num_coords; + + if (!use_x_device && !use_y_device) return ret; + + const VariationStore &store = c->var_store; + auto *cache = c->var_store_cache; + + /* pixel -> fractional pixel */ + if (format & xPlaDevice) { + if (use_x_device) glyph_pos.x_offset += (base + get_device (values, &ret)).get_x_delta (font, store, cache); + values++; + } + if (format & yPlaDevice) { + if (use_y_device) glyph_pos.y_offset += (base + get_device (values, &ret)).get_y_delta (font, store, cache); + values++; + } + if (format & xAdvDevice) { + if (horizontal && use_x_device) glyph_pos.x_advance += (base + get_device (values, &ret)).get_x_delta (font, store, cache); + values++; + } + if (format & yAdvDevice) { + /* y_advance values grow downward but font-space grows upward, hence negation */ + if (!horizontal && use_y_device) glyph_pos.y_advance -= (base + get_device (values, &ret)).get_y_delta (font, store, cache); + values++; + } + return ret; + } + + unsigned int get_effective_format (const Value *values) const + { + unsigned int format = *this; + for (unsigned flag = xPlacement; flag <= yAdvDevice; flag = flag << 1) { + if (format & flag) should_drop (*values++, (Flags) flag, &format); + } + + return format; + } + + template<typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + unsigned int get_effective_format (Iterator it) const { + unsigned int new_format = 0; + + for (const hb_array_t<const Value>& values : it) + new_format = new_format | get_effective_format (&values); + + return new_format; + } + + void copy_values (hb_serialize_context_t *c, + unsigned int new_format, + const void *base, + const Value *values, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map) const + { + unsigned int format = *this; + if (!format) return; + + HBINT16 *x_placement = nullptr, *y_placement = nullptr, *x_adv = nullptr, *y_adv = nullptr; + if (format & xPlacement) x_placement = copy_value (c, new_format, xPlacement, *values++); + if (format & yPlacement) y_placement = copy_value (c, new_format, yPlacement, *values++); + if (format & xAdvance) x_adv = copy_value (c, new_format, xAdvance, *values++); + if (format & yAdvance) y_adv = copy_value (c, new_format, yAdvance, *values++); + + if (format & xPlaDevice) + { + add_delta_to_value (x_placement, base, values, layout_variation_idx_delta_map); + copy_device (c, base, values++, layout_variation_idx_delta_map, new_format, xPlaDevice); + } + + if (format & yPlaDevice) + { + add_delta_to_value (y_placement, base, values, layout_variation_idx_delta_map); + copy_device (c, base, values++, layout_variation_idx_delta_map, new_format, yPlaDevice); + } + + if (format & xAdvDevice) + { + add_delta_to_value (x_adv, base, values, layout_variation_idx_delta_map); + copy_device (c, base, values++, layout_variation_idx_delta_map, new_format, xAdvDevice); + } + + if (format & yAdvDevice) + { + add_delta_to_value (y_adv, base, values, layout_variation_idx_delta_map); + copy_device (c, base, values++, layout_variation_idx_delta_map, new_format, yAdvDevice); + } + } + + HBINT16* copy_value (hb_serialize_context_t *c, + unsigned int new_format, + Flags flag, + Value value) const + { + // Filter by new format. + if (!(new_format & flag)) return nullptr; + return reinterpret_cast<HBINT16 *> (c->copy (value)); + } + + void collect_variation_indices (hb_collect_variation_indices_context_t *c, + const void *base, + const hb_array_t<const Value>& values) const + { + unsigned format = *this; + unsigned i = 0; + if (format & xPlacement) i++; + if (format & yPlacement) i++; + if (format & xAdvance) i++; + if (format & yAdvance) i++; + if (format & xPlaDevice) + { + (base + get_device (&(values[i]))).collect_variation_indices (c); + i++; + } + + if (format & ValueFormat::yPlaDevice) + { + (base + get_device (&(values[i]))).collect_variation_indices (c); + i++; + } + + if (format & ValueFormat::xAdvDevice) + { + + (base + get_device (&(values[i]))).collect_variation_indices (c); + i++; + } + + if (format & ValueFormat::yAdvDevice) + { + + (base + get_device (&(values[i]))).collect_variation_indices (c); + i++; + } + } + + unsigned drop_device_table_flags () const + { + unsigned format = *this; + for (unsigned flag = xPlaDevice; flag <= yAdvDevice; flag = flag << 1) + format = format & ~flag; + + return format; + } + + private: + bool sanitize_value_devices (hb_sanitize_context_t *c, const void *base, const Value *values) const + { + unsigned int format = *this; + + if (format & xPlacement) values++; + if (format & yPlacement) values++; + if (format & xAdvance) values++; + if (format & yAdvance) values++; + + if ((format & xPlaDevice) && !get_device (values++).sanitize (c, base)) return false; + if ((format & yPlaDevice) && !get_device (values++).sanitize (c, base)) return false; + if ((format & xAdvDevice) && !get_device (values++).sanitize (c, base)) return false; + if ((format & yAdvDevice) && !get_device (values++).sanitize (c, base)) return false; + + return true; + } + + static inline Offset16To<Device>& get_device (Value* value) + { + return *static_cast<Offset16To<Device> *> (value); + } + static inline const Offset16To<Device>& get_device (const Value* value, bool *worked=nullptr) + { + if (worked) *worked |= bool (*value); + return *static_cast<const Offset16To<Device> *> (value); + } + + void add_delta_to_value (HBINT16 *value, + const void *base, + const Value *src_value, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map) const + { + if (!value) return; + unsigned varidx = (base + get_device (src_value)).get_variation_index (); + hb_pair_t<unsigned, int> *varidx_delta; + if (!layout_variation_idx_delta_map->has (varidx, &varidx_delta)) return; + + *value += hb_second (*varidx_delta); + } + + bool copy_device (hb_serialize_context_t *c, const void *base, + const Value *src_value, + const hb_hashmap_t<unsigned, hb_pair_t<unsigned, int>> *layout_variation_idx_delta_map, + unsigned int new_format, Flags flag) const + { + // Filter by new format. + if (!(new_format & flag)) return true; + + Value *dst_value = c->copy (*src_value); + + if (!dst_value) return false; + if (*dst_value == 0) return true; + + *dst_value = 0; + c->push (); + if ((base + get_device (src_value)).copy (c, layout_variation_idx_delta_map)) + { + c->add_link (*dst_value, c->pop_pack ()); + return true; + } + else + { + c->pop_discard (); + return false; + } + } + + static inline const HBINT16& get_short (const Value* value, bool *worked=nullptr) + { + if (worked) *worked |= bool (*value); + return *reinterpret_cast<const HBINT16 *> (value); + } + + public: + + bool has_device () const + { + unsigned int format = *this; + return (format & devices) != 0; + } + + bool sanitize_value (hb_sanitize_context_t *c, const void *base, const Value *values) const + { + TRACE_SANITIZE (this); + return_trace (c->check_range (values, get_size ()) && (!has_device () || sanitize_value_devices (c, base, values))); + } + + bool sanitize_values (hb_sanitize_context_t *c, const void *base, const Value *values, unsigned int count) const + { + TRACE_SANITIZE (this); + unsigned int len = get_len (); + + if (!c->check_range (values, count, get_size ())) return_trace (false); + + if (!has_device ()) return_trace (true); + + for (unsigned int i = 0; i < count; i++) { + if (!sanitize_value_devices (c, base, values)) + return_trace (false); + values += len; + } + + return_trace (true); + } + + /* Just sanitize referenced Device tables. Doesn't check the values themselves. */ + bool sanitize_values_stride_unsafe (hb_sanitize_context_t *c, const void *base, const Value *values, unsigned int count, unsigned int stride) const + { + TRACE_SANITIZE (this); + + if (!has_device ()) return_trace (true); + + for (unsigned int i = 0; i < count; i++) { + if (!sanitize_value_devices (c, base, values)) + return_trace (false); + values += stride; + } + + return_trace (true); + } + + private: + + void should_drop (Value value, Flags flag, unsigned int* format) const + { + if (value) return; + *format = *format & ~flag; + } + +}; + +} +} +} + +#endif // #ifndef OT_LAYOUT_GPOS_VALUEFORMAT_HH diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSet.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSet.hh new file mode 100644 index 0000000000..6c50c9717a --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSet.hh @@ -0,0 +1,126 @@ +#ifndef OT_LAYOUT_GSUB_ALTERNATESET_HH +#define OT_LAYOUT_GSUB_ALTERNATESET_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct AlternateSet +{ + protected: + Array16Of<typename Types::HBGlyphID> + alternates; /* Array of alternate GlyphIDs--in + * arbitrary order */ + public: + DEFINE_SIZE_ARRAY (2, alternates); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (alternates.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { return hb_any (alternates, glyphs); } + + void closure (hb_closure_context_t *c) const + { c->output->add_array (alternates.arrayZ, alternates.len); } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { c->output->add_array (alternates.arrayZ, alternates.len); } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + unsigned int count = alternates.len; + + if (unlikely (!count)) return_trace (false); + + hb_mask_t glyph_mask = c->buffer->cur().mask; + hb_mask_t lookup_mask = c->lookup_mask; + + /* Note: This breaks badly if two features enabled this lookup together. */ + unsigned int shift = hb_ctz (lookup_mask); + unsigned int alt_index = ((lookup_mask & glyph_mask) >> shift); + + /* If alt_index is MAX_VALUE, randomize feature if it is the rand feature. */ + if (alt_index == HB_OT_MAP_MAX_VALUE && c->random) + { + /* Maybe we can do better than unsafe-to-break all; but since we are + * changing random state, it would be hard to track that. Good 'nough. */ + c->buffer->unsafe_to_break (0, c->buffer->len); + alt_index = c->random_number () % count + 1; + } + + if (unlikely (alt_index > count || alt_index == 0)) return_trace (false); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %d (alternate substitution)", + c->buffer->idx); + } + + c->replace_glyph (alternates[alt_index - 1]); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %d (alternate substitution)", + c->buffer->idx - 1); + } + + return_trace (true); + } + + unsigned + get_alternates (unsigned start_offset, + unsigned *alternate_count /* IN/OUT. May be NULL. */, + hb_codepoint_t *alternate_glyphs /* OUT. May be NULL. */) const + { + if (alternates.len && alternate_count) + { + + alternates.as_array ().sub_array (start_offset, alternate_count) + | hb_sink (hb_array (alternate_glyphs, *alternate_count)) + ; + } + return alternates.len; + } + + template <typename Iterator, + hb_requires (hb_is_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, + Iterator alts) + { + TRACE_SERIALIZE (this); + return_trace (alternates.serialize (c, alts)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto it = + + hb_iter (alternates) + | hb_filter (glyphset) + | hb_map (glyph_map) + ; + + auto *out = c->serializer->start_embed (*this); + return_trace (out->serialize (c->serializer, it) && + out->alternates); + } +}; + +} +} +} + + +#endif /* OT_LAYOUT_GSUB_ALTERNATESET_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubst.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubst.hh new file mode 100644 index 0000000000..9d7cd6fddf --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubst.hh @@ -0,0 +1,62 @@ +#ifndef OT_LAYOUT_GSUB_ALTERNATESUBST_HH +#define OT_LAYOUT_GSUB_ALTERNATESUBST_HH + +#include "AlternateSubstFormat1.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct AlternateSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + AlternateSubstFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + AlternateSubstFormat1_2<MediumTypes> format2; +#endif + } u; + public: + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } + + /* TODO This function is unused and not updated to 24bit GIDs. Should be done by using + * iterators. While at it perhaps using iterator of arrays of hb_codepoint_t instead. */ + bool serialize (hb_serialize_context_t *c, + hb_sorted_array_t<const HBGlyphID16> glyphs, + hb_array_t<const unsigned int> alternate_len_list, + hb_array_t<const HBGlyphID16> alternate_glyphs_list) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (u.format))) return_trace (false); + unsigned int format = 1; + u.format = format; + switch (u.format) { + case 1: return_trace (u.format1.serialize (c, glyphs, alternate_len_list, alternate_glyphs_list)); + default:return_trace (false); + } + } + + /* TODO subset() should choose format. */ + +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_ALTERNATESUBST_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.hh new file mode 100644 index 0000000000..adec65d586 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.hh @@ -0,0 +1,128 @@ +#ifndef OT_LAYOUT_GSUB_ALTERNATESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_ALTERNATESUBSTFORMAT1_HH + +#include "AlternateSet.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct AlternateSubstFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + Array16Of<typename Types::template OffsetTo<AlternateSet<Types>>> + alternateSet; /* Array of AlternateSet tables + * ordered by Coverage Index */ + public: + DEFINE_SIZE_ARRAY (2 + 2 * Types::size, alternateSet); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && alternateSet.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + bool may_have_non_1to1 () const + { return false; } + + void closure (hb_closure_context_t *c) const + { + + hb_zip (this+coverage, alternateSet) + | hb_filter (c->parent_active_glyphs (), hb_first) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const AlternateSet<Types> &_) { _.closure (c); }) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + hb_zip (this+coverage, alternateSet) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const AlternateSet<Types> &_) { _.collect_glyphs (c); }) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + unsigned + get_glyph_alternates (hb_codepoint_t gid, + unsigned start_offset, + unsigned *alternate_count /* IN/OUT. May be NULL. */, + hb_codepoint_t *alternate_glyphs /* OUT. May be NULL. */) const + { return (this+alternateSet[(this+coverage).get_coverage (gid)]) + .get_alternates (start_offset, alternate_count, alternate_glyphs); } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + + unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + return_trace ((this+alternateSet[index]).apply (c)); + } + + bool serialize (hb_serialize_context_t *c, + hb_sorted_array_t<const HBGlyphID16> glyphs, + hb_array_t<const unsigned int> alternate_len_list, + hb_array_t<const HBGlyphID16> alternate_glyphs_list) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + if (unlikely (!alternateSet.serialize (c, glyphs.length))) return_trace (false); + for (unsigned int i = 0; i < glyphs.length; i++) + { + unsigned int alternate_len = alternate_len_list[i]; + if (unlikely (!alternateSet[i] + .serialize_serialize (c, alternate_glyphs_list.sub_array (0, alternate_len)))) + return_trace (false); + alternate_glyphs_list += alternate_len; + } + return_trace (coverage.serialize_serialize (c, glyphs)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + hb_zip (this+coverage, alternateSet) + | hb_filter (glyphset, hb_first) + | hb_filter (subset_offset_array (c, out->alternateSet, this), hb_second) + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); + return_trace (bool (new_coverage)); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_ALTERNATESUBSTFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/ChainContextSubst.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/ChainContextSubst.hh new file mode 100644 index 0000000000..08fd779f73 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/ChainContextSubst.hh @@ -0,0 +1,18 @@ +#ifndef OT_LAYOUT_GSUB_CHAINCONTEXTSUBST_HH +#define OT_LAYOUT_GSUB_CHAINCONTEXTSUBST_HH + +// TODO(garretrieger): move to new layout. +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ChainContextSubst : ChainContext {}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_CHAINCONTEXTSUBST_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/Common.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/Common.hh new file mode 100644 index 0000000000..968bba0481 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/Common.hh @@ -0,0 +1,21 @@ +#ifndef OT_LAYOUT_GSUB_COMMON_HH +#define OT_LAYOUT_GSUB_COMMON_HH + +#include "../../../hb-serialize.hh" +#include "../../../hb-ot-layout-gsubgpos.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +typedef hb_pair_t<hb_codepoint_t, hb_codepoint_t> hb_codepoint_pair_t; + +template<typename Iterator> +static void SingleSubst_serialize (hb_serialize_context_t *c, + Iterator it); + +} +} +} + +#endif /* OT_LAYOUT_GSUB_COMMON_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/ContextSubst.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/ContextSubst.hh new file mode 100644 index 0000000000..9f8cb46b5e --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/ContextSubst.hh @@ -0,0 +1,18 @@ +#ifndef OT_LAYOUT_GSUB_CONTEXTSUBST_HH +#define OT_LAYOUT_GSUB_CONTEXTSUBST_HH + +// TODO(garretrieger): move to new layout. +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ContextSubst : Context {}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_CONTEXTSUBST_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/ExtensionSubst.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/ExtensionSubst.hh new file mode 100644 index 0000000000..831a7dfa2d --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/ExtensionSubst.hh @@ -0,0 +1,22 @@ +#ifndef OT_LAYOUT_GSUB_EXTENSIONSUBST_HH +#define OT_LAYOUT_GSUB_EXTENSIONSUBST_HH + +// TODO(garretrieger): move to new layout. +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ExtensionSubst : Extension<ExtensionSubst> +{ + typedef struct SubstLookupSubTable SubTable; + bool is_reverse () const; +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_EXTENSIONSUBST_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/GSUB.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/GSUB.hh new file mode 100644 index 0000000000..900cf603e4 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/GSUB.hh @@ -0,0 +1,61 @@ +#ifndef OT_LAYOUT_GSUB_GSUB_HH +#define OT_LAYOUT_GSUB_GSUB_HH + +#include "../../../hb-ot-layout-gsubgpos.hh" +#include "Common.hh" +#include "SubstLookup.hh" + +namespace OT { + +using Layout::GSUB_impl::SubstLookup; + +namespace Layout { + +/* + * GSUB -- Glyph Substitution + * https://docs.microsoft.com/en-us/typography/opentype/spec/gsub + */ + +struct GSUB : GSUBGPOS +{ + using Lookup = SubstLookup; + + static constexpr hb_tag_t tableTag = HB_OT_TAG_GSUB; + + const SubstLookup& get_lookup (unsigned int i) const + { return static_cast<const SubstLookup &> (GSUBGPOS::get_lookup (i)); } + + bool subset (hb_subset_context_t *c) const + { + hb_subset_layout_context_t l (c, tableTag); + return GSUBGPOS::subset<SubstLookup> (&l); + } + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (GSUBGPOS::sanitize<SubstLookup> (c)); + } + + HB_INTERNAL bool is_blocklisted (hb_blob_t *blob, + hb_face_t *face) const; + + void closure_lookups (hb_face_t *face, + const hb_set_t *glyphs, + hb_set_t *lookup_indexes /* IN/OUT */) const + { GSUBGPOS::closure_lookups<SubstLookup> (face, glyphs, lookup_indexes); } + + typedef GSUBGPOS::accelerator_t<GSUB> accelerator_t; +}; + + +} + +struct GSUB_accelerator_t : Layout::GSUB::accelerator_t { + GSUB_accelerator_t (hb_face_t *face) : Layout::GSUB::accelerator_t (face) {} +}; + + +} + +#endif /* OT_LAYOUT_GSUB_GSUB_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/Ligature.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/Ligature.hh new file mode 100644 index 0000000000..cdb35f525b --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/Ligature.hh @@ -0,0 +1,187 @@ +#ifndef OT_LAYOUT_GSUB_LIGATURE_HH +#define OT_LAYOUT_GSUB_LIGATURE_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct Ligature +{ + protected: + typename Types::HBGlyphID + ligGlyph; /* GlyphID of ligature to substitute */ + HeadlessArrayOf<typename Types::HBGlyphID> + component; /* Array of component GlyphIDs--start + * with the second component--ordered + * in writing direction */ + public: + DEFINE_SIZE_ARRAY (Types::size + 2, component); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (ligGlyph.sanitize (c) && component.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { return hb_all (component, glyphs); } + + void closure (hb_closure_context_t *c) const + { + if (!intersects (c->glyphs)) return; + c->output->add (ligGlyph); + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + c->input->add_array (component.arrayZ, component.get_length ()); + c->output->add (ligGlyph); + } + + bool would_apply (hb_would_apply_context_t *c) const + { + if (c->len != component.lenP1) + return false; + + for (unsigned int i = 1; i < c->len; i++) + if (likely (c->glyphs[i] != component[i])) + return false; + + return true; + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + unsigned int count = component.lenP1; + + if (unlikely (!count)) return_trace (false); + + /* Special-case to make it in-place and not consider this + * as a "ligated" substitution. */ + if (unlikely (count == 1)) + { + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %d (ligature substitution)", + c->buffer->idx); + } + + c->replace_glyph (ligGlyph); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %d (ligature substitution)", + c->buffer->idx - 1); + } + + return_trace (true); + } + + unsigned int total_component_count = 0; + + unsigned int match_end = 0; + unsigned int match_positions[HB_MAX_CONTEXT_LENGTH]; + + if (likely (!match_input (c, count, + &component[1], + match_glyph, + nullptr, + &match_end, + match_positions, + &total_component_count))) + { + c->buffer->unsafe_to_concat (c->buffer->idx, match_end); + return_trace (false); + } + + unsigned pos = 0; + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + unsigned delta = c->buffer->sync_so_far (); + + pos = c->buffer->idx; + + char buf[HB_MAX_CONTEXT_LENGTH * 16] = {0}; + char *p = buf; + + match_end += delta; + for (unsigned i = 0; i < count; i++) + { + match_positions[i] += delta; + if (i) + *p++ = ','; + snprintf (p, sizeof(buf) - (p - buf), "%u", match_positions[i]); + p += strlen(p); + } + + c->buffer->message (c->font, + "ligating glyphs at %s", + buf); + } + + ligate_input (c, + count, + match_positions, + match_end, + ligGlyph, + total_component_count); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "ligated glyph at %d", + pos); + } + + return_trace (true); + } + + template <typename Iterator, + hb_requires (hb_is_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, + hb_codepoint_t ligature, + Iterator components /* Starting from second */) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + ligGlyph = ligature; + if (unlikely (!component.serialize (c, components))) return_trace (false); + return_trace (true); + } + + bool subset (hb_subset_context_t *c, unsigned coverage_idx) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + if (!intersects (&glyphset) || !glyphset.has (ligGlyph)) return_trace (false); + // Ensure Coverage table is always packed after this. + c->serializer->add_virtual_link (coverage_idx); + + auto it = + + hb_iter (component) + | hb_map (glyph_map) + ; + + auto *out = c->serializer->start_embed (*this); + return_trace (out->serialize (c->serializer, + glyph_map[ligGlyph], + it)); } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GSUB_LIGATURE_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh new file mode 100644 index 0000000000..637cec7137 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh @@ -0,0 +1,119 @@ +#ifndef OT_LAYOUT_GSUB_LIGATURESET_HH +#define OT_LAYOUT_GSUB_LIGATURESET_HH + +#include "Common.hh" +#include "Ligature.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct LigatureSet +{ + protected: + Array16OfOffset16To<Ligature<Types>> + ligature; /* Array LigatureSet tables + * ordered by preference */ + public: + DEFINE_SIZE_ARRAY (2, ligature); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (ligature.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { + return + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_map ([glyphs] (const Ligature<Types> &_) { return _.intersects (glyphs); }) + | hb_any + ; + } + + void closure (hb_closure_context_t *c) const + { + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_apply ([c] (const Ligature<Types> &_) { _.closure (c); }) + ; + } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_apply ([c] (const Ligature<Types> &_) { _.collect_glyphs (c); }) + ; + } + + bool would_apply (hb_would_apply_context_t *c) const + { + return + + hb_iter (ligature) + | hb_map (hb_add (this)) + | hb_map ([c] (const Ligature<Types> &_) { return _.would_apply (c); }) + | hb_any + ; + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + unsigned int num_ligs = ligature.len; + for (unsigned int i = 0; i < num_ligs; i++) + { + const auto &lig = this+ligature[i]; + if (lig.apply (c)) return_trace (true); + } + + return_trace (false); + } + + bool serialize (hb_serialize_context_t *c, + hb_array_t<const HBGlyphID16> ligatures, + hb_array_t<const unsigned int> component_count_list, + hb_array_t<const HBGlyphID16> &component_list /* Starting from second for each ligature */) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + if (unlikely (!ligature.serialize (c, ligatures.length))) return_trace (false); + for (unsigned int i = 0; i < ligatures.length; i++) + { + unsigned int component_count = (unsigned) hb_max ((int) component_count_list[i] - 1, 0); + if (unlikely (!ligature[i].serialize_serialize (c, + ligatures[i], + component_list.sub_array (0, component_count)))) + return_trace (false); + component_list += component_count; + } + return_trace (true); + } + + bool subset (hb_subset_context_t *c, unsigned coverage_idx) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + + hb_iter (ligature) + | hb_filter (subset_offset_array (c, out->ligature, this, coverage_idx)) + | hb_drain + ; + + if (bool (out->ligature)) + // Ensure Coverage table is always packed after this. + c->serializer->add_virtual_link (coverage_idx); + + return_trace (bool (out->ligature)); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_LIGATURESET_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSubst.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSubst.hh new file mode 100644 index 0000000000..7ba19e844c --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSubst.hh @@ -0,0 +1,71 @@ +#ifndef OT_LAYOUT_GSUB_LIGATURESUBST_HH +#define OT_LAYOUT_GSUB_LIGATURESUBST_HH + +#include "Common.hh" +#include "LigatureSubstFormat1.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct LigatureSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + LigatureSubstFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + LigatureSubstFormat1_2<MediumTypes> format2; +#endif + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } + + /* TODO This function is only used by small GIDs, and not updated to 24bit GIDs. Should + * be done by using iterators. While at it perhaps using iterator of arrays of hb_codepoint_t + * instead. */ + bool serialize (hb_serialize_context_t *c, + hb_sorted_array_t<const HBGlyphID16> first_glyphs, + hb_array_t<const unsigned int> ligature_per_first_glyph_count_list, + hb_array_t<const HBGlyphID16> ligatures_list, + hb_array_t<const unsigned int> component_count_list, + hb_array_t<const HBGlyphID16> component_list /* Starting from second for each ligature */) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (u.format))) return_trace (false); + unsigned int format = 1; + u.format = format; + switch (u.format) { + case 1: return_trace (u.format1.serialize (c, + first_glyphs, + ligature_per_first_glyph_count_list, + ligatures_list, + component_count_list, + component_list)); + default:return_trace (false); + } + } + + /* TODO subset() should choose format. */ + +}; + + +} +} +} + +#endif /* OT_LAYOUT_GSUB_LIGATURESUBST_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSubstFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSubstFormat1.hh new file mode 100644 index 0000000000..32b642c38a --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/LigatureSubstFormat1.hh @@ -0,0 +1,166 @@ +#ifndef OT_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH + +#include "Common.hh" +#include "LigatureSet.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct LigatureSubstFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + Array16Of<typename Types::template OffsetTo<LigatureSet<Types>>> + ligatureSet; /* Array LigatureSet tables + * ordered by Coverage Index */ + public: + DEFINE_SIZE_ARRAY (4 + Types::size, ligatureSet); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && ligatureSet.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { + return + + hb_zip (this+coverage, ligatureSet) + | hb_filter (*glyphs, hb_first) + | hb_map (hb_second) + | hb_map ([this, glyphs] (const typename Types::template OffsetTo<LigatureSet<Types>> &_) + { return (this+_).intersects (glyphs); }) + | hb_any + ; + } + + bool may_have_non_1to1 () const + { return true; } + + void closure (hb_closure_context_t *c) const + { + + hb_zip (this+coverage, ligatureSet) + | hb_filter (c->parent_active_glyphs (), hb_first) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const LigatureSet<Types> &_) { _.closure (c); }) + ; + + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + + hb_zip (this+coverage, ligatureSet) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const LigatureSet<Types> &_) { _.collect_glyphs (c); }) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { + unsigned int index = (this+coverage).get_coverage (c->glyphs[0]); + if (likely (index == NOT_COVERED)) return false; + + const auto &lig_set = this+ligatureSet[index]; + return lig_set.would_apply (c); + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + + unsigned int index = (this+coverage).get_coverage (c->buffer->cur ().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + const auto &lig_set = this+ligatureSet[index]; + return_trace (lig_set.apply (c)); + } + + bool serialize (hb_serialize_context_t *c, + hb_sorted_array_t<const HBGlyphID16> first_glyphs, + hb_array_t<const unsigned int> ligature_per_first_glyph_count_list, + hb_array_t<const HBGlyphID16> ligatures_list, + hb_array_t<const unsigned int> component_count_list, + hb_array_t<const HBGlyphID16> component_list /* Starting from second for each ligature */) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + if (unlikely (!ligatureSet.serialize (c, first_glyphs.length))) return_trace (false); + for (unsigned int i = 0; i < first_glyphs.length; i++) + { + unsigned int ligature_count = ligature_per_first_glyph_count_list[i]; + if (unlikely (!ligatureSet[i] + .serialize_serialize (c, + ligatures_list.sub_array (0, ligature_count), + component_count_list.sub_array (0, ligature_count), + component_list))) return_trace (false); + ligatures_list += ligature_count; + component_count_list += ligature_count; + } + return_trace (coverage.serialize_serialize (c, first_glyphs)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + // Due to a bug in some older versions of windows 7 the Coverage table must be + // packed after the LigatureSet and Ligature tables, so serialize Coverage first + // which places it last in the packed order. + hb_set_t new_coverage; + + hb_zip (this+coverage, hb_iter (ligatureSet) | hb_map (hb_add (this))) + | hb_filter (glyphset, hb_first) + | hb_filter ([&] (const LigatureSet<Types>& _) { + return _.intersects (&glyphset); + }, hb_second) + | hb_map (hb_first) + | hb_sink (new_coverage); + + if (!c->serializer->push<Coverage> () + ->serialize (c->serializer, + + new_coverage.iter () | hb_map_retains_sorting (glyph_map))) + { + c->serializer->pop_discard (); + return_trace (false); + } + + unsigned coverage_idx = c->serializer->pop_pack (); + c->serializer->add_link (out->coverage, coverage_idx); + + + hb_zip (this+coverage, ligatureSet) + | hb_filter (new_coverage, hb_first) + | hb_map (hb_second) + // to ensure that the repacker always orders the coverage table after the LigatureSet + // and LigatureSubtable's they will be linked to the Coverage table via a virtual link + // the coverage table object idx is passed down to facilitate this. + | hb_apply (subset_offset_array (c, out->ligatureSet, this, coverage_idx)) + ; + + return_trace (bool (new_coverage)); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_LIGATURESUBSTFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/MultipleSubst.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/MultipleSubst.hh new file mode 100644 index 0000000000..95710ed2be --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/MultipleSubst.hh @@ -0,0 +1,62 @@ +#ifndef OT_LAYOUT_GSUB_MULTIPLESUBST_HH +#define OT_LAYOUT_GSUB_MULTIPLESUBST_HH + +#include "Common.hh" +#include "MultipleSubstFormat1.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct MultipleSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + MultipleSubstFormat1_2<SmallTypes> format1; +#ifndef HB_NO_BEYOND_64K + MultipleSubstFormat1_2<MediumTypes> format2; +#endif + } u; + + public: + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } + + template<typename Iterator, + hb_requires (hb_is_sorted_iterator (Iterator))> + bool serialize (hb_serialize_context_t *c, + Iterator it) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (u.format))) return_trace (false); + unsigned int format = 1; + u.format = format; + switch (u.format) { + case 1: return_trace (u.format1.serialize (c, it)); + default:return_trace (false); + } + } + + /* TODO subset() should choose format. */ + +}; + + +} +} +} + +#endif /* OT_LAYOUT_GSUB_MULTIPLESUBST_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/MultipleSubstFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/MultipleSubstFormat1.hh new file mode 100644 index 0000000000..3b4bd11694 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/MultipleSubstFormat1.hh @@ -0,0 +1,130 @@ +#ifndef OT_LAYOUT_GSUB_MULTIPLESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_MULTIPLESUBSTFORMAT1_HH + +#include "Common.hh" +#include "Sequence.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct MultipleSubstFormat1_2 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + Array16Of<typename Types::template OffsetTo<Sequence<Types>>> + sequence; /* Array of Sequence tables + * ordered by Coverage Index */ + public: + DEFINE_SIZE_ARRAY (4 + Types::size, sequence); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && sequence.sanitize (c, this)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + bool may_have_non_1to1 () const + { return true; } + + void closure (hb_closure_context_t *c) const + { + + hb_zip (this+coverage, sequence) + | hb_filter (c->parent_active_glyphs (), hb_first) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const Sequence<Types> &_) { _.closure (c); }) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + hb_zip (this+coverage, sequence) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([c] (const Sequence<Types> &_) { _.collect_glyphs (c); }) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + + unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + return_trace ((this+sequence[index]).apply (c)); + } + + template<typename Iterator, + hb_requires (hb_is_sorted_iterator (Iterator))> + bool serialize (hb_serialize_context_t *c, + Iterator it) + { + TRACE_SERIALIZE (this); + auto sequences = + + it + | hb_map (hb_second) + ; + auto glyphs = + + it + | hb_map_retains_sorting (hb_first) + ; + if (unlikely (!c->extend_min (this))) return_trace (false); + + if (unlikely (!sequence.serialize (c, sequences.length))) return_trace (false); + + for (auto& pair : hb_zip (sequences, sequence)) + { + if (unlikely (!pair.second + .serialize_serialize (c, pair.first))) + return_trace (false); + } + + return_trace (coverage.serialize_serialize (c, glyphs)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + out->format = format; + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + hb_zip (this+coverage, sequence) + | hb_filter (glyphset, hb_first) + | hb_filter (subset_offset_array (c, out->sequence, this), hb_second) + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); + return_trace (bool (new_coverage)); + } +}; + +} +} +} + + +#endif /* OT_LAYOUT_GSUB_MULTIPLESUBSTFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh new file mode 100644 index 0000000000..48e208efb9 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh @@ -0,0 +1,36 @@ +#ifndef OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBST_HH +#define OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBST_HH + +#include "Common.hh" +#include "ReverseChainSingleSubstFormat1.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ReverseChainSingleSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + ReverseChainSingleSubstFormat1 format1; + } u; + + public: + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); + default:return_trace (c->default_return_value ()); + } + } +}; + +} +} +} + +#endif /* HB_OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBST_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh new file mode 100644 index 0000000000..a23e92028e --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh @@ -0,0 +1,244 @@ +#ifndef OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBSTFORMAT1_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct ReverseChainSingleSubstFormat1 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + Offset16To<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of table */ + Array16OfOffset16To<Coverage> + backtrack; /* Array of coverage tables + * in backtracking sequence, in glyph + * sequence order */ + Array16OfOffset16To<Coverage> + lookaheadX; /* Array of coverage tables + * in lookahead sequence, in glyph + * sequence order */ + Array16Of<HBGlyphID16> + substituteX; /* Array of substitute + * GlyphIDs--ordered by Coverage Index */ + public: + DEFINE_SIZE_MIN (10); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (!(coverage.sanitize (c, this) && backtrack.sanitize (c, this))) + return_trace (false); + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + if (!lookahead.sanitize (c, this)) + return_trace (false); + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + return_trace (substitute.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { + if (!(this+coverage).intersects (glyphs)) + return false; + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + + unsigned int count; + + count = backtrack.len; + for (unsigned int i = 0; i < count; i++) + if (!(this+backtrack[i]).intersects (glyphs)) + return false; + + count = lookahead.len; + for (unsigned int i = 0; i < count; i++) + if (!(this+lookahead[i]).intersects (glyphs)) + return false; + + return true; + } + + bool may_have_non_1to1 () const + { return false; } + + void closure (hb_closure_context_t *c) const + { + if (!intersects (c->glyphs)) return; + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + + + hb_zip (this+coverage, substitute) + | hb_filter (c->parent_active_glyphs (), hb_first) + | hb_map (hb_second) + | hb_sink (c->output) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + unsigned int count; + + count = backtrack.len; + for (unsigned int i = 0; i < count; i++) + if (unlikely (!(this+backtrack[i]).collect_coverage (c->before))) return; + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + count = lookahead.len; + for (unsigned int i = 0; i < count; i++) + if (unlikely (!(this+lookahead[i]).collect_coverage (c->after))) return; + + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + count = substitute.len; + c->output->add_array (substitute.arrayZ, substitute.len); + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + if (unlikely (c->nesting_level_left != HB_MAX_NESTING_LEVEL)) + return_trace (false); /* No chaining to this type */ + + unsigned int index = (this+coverage).get_coverage (c->buffer->cur ().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + + if (unlikely (index >= substitute.len)) return_trace (false); + + unsigned int start_index = 0, end_index = 0; + if (match_backtrack (c, + backtrack.len, (HBUINT16 *) backtrack.arrayZ, + match_coverage, this, + &start_index) && + match_lookahead (c, + lookahead.len, (HBUINT16 *) lookahead.arrayZ, + match_coverage, this, + c->buffer->idx + 1, &end_index)) + { + c->buffer->unsafe_to_break_from_outbuffer (start_index, end_index); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replacing glyph at %d (reverse chaining substitution)", + c->buffer->idx); + } + + c->replace_glyph_inplace (substitute[index]); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %d (reverse chaining substitution)", + c->buffer->idx); + } + + /* Note: We DON'T decrease buffer->idx. The main loop does it + * for us. This is useful for preventing surprises if someone + * calls us through a Context lookup. */ + return_trace (true); + } + else + { + c->buffer->unsafe_to_concat_from_outbuffer (start_index, end_index); + return_trace (false); + } + } + + template<typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + bool serialize_coverage_offset_array (hb_subset_context_t *c, Iterator it) const + { + TRACE_SERIALIZE (this); + auto *out = c->serializer->start_embed<Array16OfOffset16To<Coverage>> (); + + if (unlikely (!c->serializer->allocate_size<HBUINT16> (HBUINT16::static_size))) + return_trace (false); + + for (auto& offset : it) { + auto *o = out->serialize_append (c->serializer); + if (unlikely (!o) || !o->serialize_subset (c, offset, this)) + return_trace (false); + } + + return_trace (true); + } + + template<typename Iterator, typename BacktrackIterator, typename LookaheadIterator, + hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_pair_t)), + hb_requires (hb_is_iterator (BacktrackIterator)), + hb_requires (hb_is_iterator (LookaheadIterator))> + bool serialize (hb_subset_context_t *c, + Iterator coverage_subst_iter, + BacktrackIterator backtrack_iter, + LookaheadIterator lookahead_iter) const + { + TRACE_SERIALIZE (this); + + auto *out = c->serializer->start_embed (this); + if (unlikely (!c->serializer->check_success (out))) return_trace (false); + if (unlikely (!c->serializer->embed (this->format))) return_trace (false); + if (unlikely (!c->serializer->embed (this->coverage))) return_trace (false); + + if (!serialize_coverage_offset_array (c, backtrack_iter)) return_trace (false); + if (!serialize_coverage_offset_array (c, lookahead_iter)) return_trace (false); + + auto *substitute_out = c->serializer->start_embed<Array16Of<HBGlyphID16>> (); + auto substitutes = + + coverage_subst_iter + | hb_map (hb_second) + ; + + auto glyphs = + + coverage_subst_iter + | hb_map_retains_sorting (hb_first) + ; + if (unlikely (! c->serializer->check_success (substitute_out->serialize (c->serializer, substitutes)))) + return_trace (false); + + if (unlikely (!out->coverage.serialize_serialize (c->serializer, glyphs))) + return_trace (false); + return_trace (true); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + const auto &lookahead = StructAfter<decltype (lookaheadX)> (backtrack); + const auto &substitute = StructAfter<decltype (substituteX)> (lookahead); + + auto it = + + hb_zip (this+coverage, substitute) + | hb_filter (glyphset, hb_first) + | hb_filter (glyphset, hb_second) + | hb_map_retains_sorting ([&] (hb_pair_t<hb_codepoint_t, const HBGlyphID16 &> p) -> hb_codepoint_pair_t + { return hb_pair (glyph_map[p.first], glyph_map[p.second]); }) + ; + + return_trace (bool (it) && serialize (c, it, backtrack.iter (), lookahead.iter ())); + } +}; + +} +} +} + +#endif /* HB_OT_LAYOUT_GSUB_REVERSECHAINSINGLESUBSTFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/Sequence.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/Sequence.hh new file mode 100644 index 0000000000..e2190078b8 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/Sequence.hh @@ -0,0 +1,165 @@ +#ifndef OT_LAYOUT_GSUB_SEQUENCE_HH +#define OT_LAYOUT_GSUB_SEQUENCE_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct Sequence +{ + protected: + Array16Of<typename Types::HBGlyphID> + substitute; /* String of GlyphIDs to substitute */ + public: + DEFINE_SIZE_ARRAY (2, substitute); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (substitute.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { return hb_all (substitute, glyphs); } + + void closure (hb_closure_context_t *c) const + { c->output->add_array (substitute.arrayZ, substitute.len); } + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { c->output->add_array (substitute.arrayZ, substitute.len); } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + unsigned int count = substitute.len; + + /* Special-case to make it in-place and not consider this + * as a "multiplied" substitution. */ + if (unlikely (count == 1)) + { + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %d (multiple substitution)", + c->buffer->idx); + } + + c->replace_glyph (substitute.arrayZ[0]); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %d (multiple subtitution)", + c->buffer->idx - 1); + } + + return_trace (true); + } + /* Spec disallows this, but Uniscribe allows it. + * https://github.com/harfbuzz/harfbuzz/issues/253 */ + else if (unlikely (count == 0)) + { + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "deleting glyph at %d (multiple substitution)", + c->buffer->idx); + } + + c->buffer->delete_glyph (); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "deleted glyph at %d (multiple substitution)", + c->buffer->idx); + } + + return_trace (true); + } + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "multiplying glyph at %d", + c->buffer->idx); + } + + unsigned int klass = _hb_glyph_info_is_ligature (&c->buffer->cur()) ? + HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH : 0; + unsigned lig_id = _hb_glyph_info_get_lig_id (&c->buffer->cur()); + + for (unsigned int i = 0; i < count; i++) + { + /* If is attached to a ligature, don't disturb that. + * https://github.com/harfbuzz/harfbuzz/issues/3069 */ + if (!lig_id) + _hb_glyph_info_set_lig_props_for_component (&c->buffer->cur(), i); + c->output_glyph_for_component (substitute.arrayZ[i], klass); + } + c->buffer->skip_glyph (); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + + char buf[HB_MAX_CONTEXT_LENGTH * 16] = {0}; + char *p = buf; + + for (unsigned i = c->buffer->idx - count; i < c->buffer->idx; i++) + { + if (buf < p) + *p++ = ','; + snprintf (p, sizeof(buf) - (p - buf), "%u", i); + p += strlen(p); + } + + c->buffer->message (c->font, + "multiplied glyphs at %s", + buf); + } + + return_trace (true); + } + + template <typename Iterator, + hb_requires (hb_is_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, + Iterator subst) + { + TRACE_SERIALIZE (this); + return_trace (substitute.serialize (c, subst)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + if (!intersects (&glyphset)) return_trace (false); + + auto it = + + hb_iter (substitute) + | hb_map (glyph_map) + ; + + auto *out = c->serializer->start_embed (*this); + return_trace (out->serialize (c->serializer, it)); + } +}; + + +} +} +} + + +#endif /* OT_LAYOUT_GSUB_SEQUENCE_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubst.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubst.hh new file mode 100644 index 0000000000..7da8103168 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubst.hh @@ -0,0 +1,103 @@ +#ifndef OT_LAYOUT_GSUB_SINGLESUBST_HH +#define OT_LAYOUT_GSUB_SINGLESUBST_HH + +#include "Common.hh" +#include "SingleSubstFormat1.hh" +#include "SingleSubstFormat2.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct SingleSubst +{ + protected: + union { + HBUINT16 format; /* Format identifier */ + SingleSubstFormat1_3<SmallTypes> format1; + SingleSubstFormat2_4<SmallTypes> format2; +#ifndef HB_NO_BEYOND_64K + SingleSubstFormat1_3<MediumTypes> format3; + SingleSubstFormat2_4<MediumTypes> format4; +#endif + } u; + + public: + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { + TRACE_DISPATCH (this, u.format); + if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ()); + switch (u.format) { + case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...)); + case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...)); +#ifndef HB_NO_BEYOND_64K + case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...)); + case 4: return_trace (c->dispatch (u.format4, std::forward<Ts> (ds)...)); +#endif + default:return_trace (c->default_return_value ()); + } + } + + template<typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, + const hb_codepoint_pair_t))> + bool serialize (hb_serialize_context_t *c, + Iterator glyphs) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (u.format))) return_trace (false); + unsigned format = 2; + unsigned delta = 0; + if (glyphs) + { + format = 1; + hb_codepoint_t mask = 0xFFFFu; + +#ifndef HB_NO_BEYOND_64K + if (+ glyphs + | hb_map_retains_sorting (hb_first) + | hb_filter ([] (hb_codepoint_t gid) { return gid > 0xFFFFu; })) + { + format += 2; + mask = 0xFFFFFFu; + } +#endif + + auto get_delta = [=] (hb_codepoint_pair_t _) + { return (unsigned) (_.second - _.first) & mask; }; + delta = get_delta (*glyphs); + if (!hb_all (++(+glyphs), delta, get_delta)) format += 1; + } + + u.format = format; + switch (u.format) { + case 1: return_trace (u.format1.serialize (c, + + glyphs + | hb_map_retains_sorting (hb_first), + delta)); + case 2: return_trace (u.format2.serialize (c, glyphs)); +#ifndef HB_NO_BEYOND_64K + case 3: return_trace (u.format3.serialize (c, + + glyphs + | hb_map_retains_sorting (hb_first), + delta)); + case 4: return_trace (u.format4.serialize (c, glyphs)); +#endif + default:return_trace (false); + } + } +}; + +template<typename Iterator> +static void +SingleSubst_serialize (hb_serialize_context_t *c, + Iterator it) +{ c->start_embed<SingleSubst> ()->serialize (c, it); } + +} +} +} + +#endif /* OT_LAYOUT_GSUB_SINGLESUBST_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat1.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat1.hh new file mode 100644 index 0000000000..1be21b98bc --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat1.hh @@ -0,0 +1,168 @@ +#ifndef OT_LAYOUT_GSUB_SINGLESUBSTFORMAT1_HH +#define OT_LAYOUT_GSUB_SINGLESUBSTFORMAT1_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct SingleSubstFormat1_3 +{ + protected: + HBUINT16 format; /* Format identifier--format = 1 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + typename Types::HBUINT + deltaGlyphID; /* Add to original GlyphID to get + * substitute GlyphID, modulo 0x10000 */ + + public: + DEFINE_SIZE_STATIC (2 + 2 * Types::size); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && deltaGlyphID.sanitize (c)); + } + + hb_codepoint_t get_mask () const + { return (1 << (8 * Types::size)) - 1; } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + bool may_have_non_1to1 () const + { return false; } + + void closure (hb_closure_context_t *c) const + { + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + /* Help fuzzer avoid this function as much. */ + unsigned pop = (this+coverage).get_population (); + if (pop >= mask) + return; + + hb_set_t intersection; + (this+coverage).intersect_set (c->parent_active_glyphs (), intersection); + + /* In degenerate fuzzer-found fonts, but not real fonts, + * this table can keep adding new glyphs in each round of closure. + * Refuse to close-over, if it maps glyph range to overlapping range. */ + hb_codepoint_t min_before = intersection.get_min (); + hb_codepoint_t max_before = intersection.get_max (); + hb_codepoint_t min_after = (min_before + d) & mask; + hb_codepoint_t max_after = (max_before + d) & mask; + if (intersection.get_population () == max_before - min_before + 1 && + ((min_before <= min_after && min_after <= max_before) || + (min_before <= max_after && max_after <= max_before))) + return; + + + hb_iter (intersection) + | hb_map ([d, mask] (hb_codepoint_t g) { return (g + d) & mask; }) + | hb_sink (c->output) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + + hb_iter (this+coverage) + | hb_map ([d, mask] (hb_codepoint_t g) { return (g + d) & mask; }) + | hb_sink (c->output) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + hb_codepoint_t glyph_id = c->buffer->cur().codepoint; + unsigned int index = (this+coverage).get_coverage (glyph_id); + if (likely (index == NOT_COVERED)) return_trace (false); + + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + glyph_id = (glyph_id + d) & mask; + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %d (single substitution)", + c->buffer->idx); + } + + c->replace_glyph (glyph_id); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %d (single substitution)", + c->buffer->idx - 1); + } + + return_trace (true); + } + + template<typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, hb_codepoint_t))> + bool serialize (hb_serialize_context_t *c, + Iterator glyphs, + unsigned delta) + { + TRACE_SERIALIZE (this); + if (unlikely (!c->extend_min (this))) return_trace (false); + if (unlikely (!coverage.serialize_serialize (c, glyphs))) return_trace (false); + c->check_assign (deltaGlyphID, delta, HB_SERIALIZE_ERROR_INT_OVERFLOW); + return_trace (true); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + hb_codepoint_t d = deltaGlyphID; + hb_codepoint_t mask = get_mask (); + + hb_set_t intersection; + (this+coverage).intersect_set (glyphset, intersection); + + auto it = + + hb_iter (intersection) + | hb_map_retains_sorting ([d, mask] (hb_codepoint_t g) { + return hb_codepoint_pair_t (g, + (g + d) & mask); }) + | hb_filter (glyphset, hb_second) + | hb_map_retains_sorting ([&] (hb_codepoint_pair_t p) -> hb_codepoint_pair_t + { return hb_pair (glyph_map[p.first], glyph_map[p.second]); }) + ; + + bool ret = bool (it); + SingleSubst_serialize (c->serializer, it); + return_trace (ret); + } +}; + +} +} +} + + +#endif /* OT_LAYOUT_GSUB_SINGLESUBSTFORMAT1_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat2.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat2.hh new file mode 100644 index 0000000000..01df714525 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat2.hh @@ -0,0 +1,151 @@ +#ifndef OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH +#define OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH + +#include "Common.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +template <typename Types> +struct SingleSubstFormat2_4 +{ + protected: + HBUINT16 format; /* Format identifier--format = 2 */ + typename Types::template OffsetTo<Coverage> + coverage; /* Offset to Coverage table--from + * beginning of Substitution table */ + Array16Of<typename Types::HBGlyphID> + substitute; /* Array of substitute + * GlyphIDs--ordered by Coverage Index */ + + public: + DEFINE_SIZE_ARRAY (4 + Types::size, substitute); + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (coverage.sanitize (c, this) && substitute.sanitize (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { return (this+coverage).intersects (glyphs); } + + bool may_have_non_1to1 () const + { return false; } + + void closure (hb_closure_context_t *c) const + { + auto &cov = this+coverage; + auto &glyph_set = c->parent_active_glyphs (); + + if (substitute.len > glyph_set.get_population () * 4) + { + for (auto g : glyph_set) + { + unsigned i = cov.get_coverage (g); + if (i == NOT_COVERED || i >= substitute.len) + continue; + c->output->add (substitute.arrayZ[i]); + } + + return; + } + + + hb_zip (cov, substitute) + | hb_filter (glyph_set, hb_first) + | hb_map (hb_second) + | hb_sink (c->output) + ; + } + + void closure_lookups (hb_closure_lookups_context_t *c) const {} + + void collect_glyphs (hb_collect_glyphs_context_t *c) const + { + if (unlikely (!(this+coverage).collect_coverage (c->input))) return; + + hb_zip (this+coverage, substitute) + | hb_map (hb_second) + | hb_sink (c->output) + ; + } + + const Coverage &get_coverage () const { return this+coverage; } + + bool would_apply (hb_would_apply_context_t *c) const + { return c->len == 1 && (this+coverage).get_coverage (c->glyphs[0]) != NOT_COVERED; } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint); + if (likely (index == NOT_COVERED)) return_trace (false); + + if (unlikely (index >= substitute.len)) return_trace (false); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->sync_so_far (); + c->buffer->message (c->font, + "replacing glyph at %d (single substitution)", + c->buffer->idx); + } + + c->replace_glyph (substitute[index]); + + if (HB_BUFFER_MESSAGE_MORE && c->buffer->messaging ()) + { + c->buffer->message (c->font, + "replaced glyph at %d (single substitution)", + c->buffer->idx - 1); + } + + return_trace (true); + } + + template<typename Iterator, + hb_requires (hb_is_sorted_source_of (Iterator, + hb_codepoint_pair_t))> + bool serialize (hb_serialize_context_t *c, + Iterator it) + { + TRACE_SERIALIZE (this); + auto substitutes = + + it + | hb_map (hb_second) + ; + auto glyphs = + + it + | hb_map_retains_sorting (hb_first) + ; + if (unlikely (!c->extend_min (this))) return_trace (false); + if (unlikely (!substitute.serialize (c, substitutes))) return_trace (false); + if (unlikely (!coverage.serialize_serialize (c, glyphs))) return_trace (false); + return_trace (true); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = *c->plan->glyphset_gsub (); + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto it = + + hb_zip (this+coverage, substitute) + | hb_filter (glyphset, hb_first) + | hb_filter (glyphset, hb_second) + | hb_map_retains_sorting ([&] (hb_pair_t<hb_codepoint_t, const typename Types::HBGlyphID &> p) -> hb_codepoint_pair_t + { return hb_pair (glyph_map[p.first], glyph_map[p.second]); }) + ; + + bool ret = bool (it); + SingleSubst_serialize (c->serializer, it); + return_trace (ret); + } +}; + +} +} +} + +#endif /* OT_LAYOUT_GSUB_SINGLESUBSTFORMAT2_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/SubstLookup.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/SubstLookup.hh new file mode 100644 index 0000000000..d49dcc0e0f --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/SubstLookup.hh @@ -0,0 +1,220 @@ +#ifndef OT_LAYOUT_GSUB_SUBSTLOOKUP_HH +#define OT_LAYOUT_GSUB_SUBSTLOOKUP_HH + +#include "Common.hh" +#include "SubstLookupSubTable.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct SubstLookup : Lookup +{ + using SubTable = SubstLookupSubTable; + + bool sanitize (hb_sanitize_context_t *c) const + { return Lookup::sanitize<SubTable> (c); } + + const SubTable& get_subtable (unsigned int i) const + { return Lookup::get_subtable<SubTable> (i); } + + static inline bool lookup_type_is_reverse (unsigned int lookup_type) + { return lookup_type == SubTable::ReverseChainSingle; } + + bool is_reverse () const + { + unsigned int type = get_type (); + if (unlikely (type == SubTable::Extension)) + return get_subtable (0).u.extension.is_reverse (); + return lookup_type_is_reverse (type); + } + + bool may_have_non_1to1 () const + { + hb_have_non_1to1_context_t c; + return dispatch (&c); + } + + bool apply (hb_ot_apply_context_t *c) const + { + TRACE_APPLY (this); + return_trace (dispatch (c)); + } + + bool intersects (const hb_set_t *glyphs) const + { + hb_intersects_context_t c (glyphs); + return dispatch (&c); + } + + hb_closure_context_t::return_t closure (hb_closure_context_t *c, unsigned int this_index) const + { + if (!c->should_visit_lookup (this_index)) + return hb_closure_context_t::default_return_value (); + + c->set_recurse_func (dispatch_closure_recurse_func); + + hb_closure_context_t::return_t ret = dispatch (c); + + c->flush (); + + return ret; + } + + hb_closure_lookups_context_t::return_t closure_lookups (hb_closure_lookups_context_t *c, unsigned this_index) const + { + if (c->is_lookup_visited (this_index)) + return hb_closure_lookups_context_t::default_return_value (); + + c->set_lookup_visited (this_index); + if (!intersects (c->glyphs)) + { + c->set_lookup_inactive (this_index); + return hb_closure_lookups_context_t::default_return_value (); + } + + hb_closure_lookups_context_t::return_t ret = dispatch (c); + return ret; + } + + hb_collect_glyphs_context_t::return_t collect_glyphs (hb_collect_glyphs_context_t *c) const + { + c->set_recurse_func (dispatch_recurse_func<hb_collect_glyphs_context_t>); + return dispatch (c); + } + + template <typename set_t> + void collect_coverage (set_t *glyphs) const + { + hb_collect_coverage_context_t<set_t> c (glyphs); + dispatch (&c); + } + + bool would_apply (hb_would_apply_context_t *c, + const hb_ot_layout_lookup_accelerator_t *accel) const + { + if (unlikely (!c->len)) return false; + if (!accel->may_have (c->glyphs[0])) return false; + return dispatch (c); + } + + template<typename Glyphs, typename Substitutes, + hb_requires (hb_is_sorted_source_of (Glyphs, + const hb_codepoint_t) && + hb_is_source_of (Substitutes, + const hb_codepoint_t))> + bool serialize_single (hb_serialize_context_t *c, + uint32_t lookup_props, + Glyphs glyphs, + Substitutes substitutes) + { + TRACE_SERIALIZE (this); + if (unlikely (!Lookup::serialize (c, SubTable::Single, lookup_props, 1))) return_trace (false); + if (c->push<SubTable> ()->u.single.serialize (c, hb_zip (glyphs, substitutes))) + { + c->add_link (get_subtables<SubTable> ()[0], c->pop_pack ()); + return_trace (true); + } + c->pop_discard (); + return_trace (false); + } + + template<typename Iterator, + hb_requires (hb_is_sorted_iterator (Iterator))> + bool serialize (hb_serialize_context_t *c, + uint32_t lookup_props, + Iterator it) + { + TRACE_SERIALIZE (this); + if (unlikely (!Lookup::serialize (c, SubTable::Multiple, lookup_props, 1))) return_trace (false); + if (c->push<SubTable> ()->u.multiple. + serialize (c, it)) + { + c->add_link (get_subtables<SubTable> ()[0], c->pop_pack ()); + return_trace (true); + } + c->pop_discard (); + return_trace (false); + } + + bool serialize_alternate (hb_serialize_context_t *c, + uint32_t lookup_props, + hb_sorted_array_t<const HBGlyphID16> glyphs, + hb_array_t<const unsigned int> alternate_len_list, + hb_array_t<const HBGlyphID16> alternate_glyphs_list) + { + TRACE_SERIALIZE (this); + if (unlikely (!Lookup::serialize (c, SubTable::Alternate, lookup_props, 1))) return_trace (false); + + if (c->push<SubTable> ()->u.alternate. + serialize (c, + glyphs, + alternate_len_list, + alternate_glyphs_list)) + { + c->add_link (get_subtables<SubTable> ()[0], c->pop_pack ()); + return_trace (true); + } + c->pop_discard (); + return_trace (false); + } + + bool serialize_ligature (hb_serialize_context_t *c, + uint32_t lookup_props, + hb_sorted_array_t<const HBGlyphID16> first_glyphs, + hb_array_t<const unsigned int> ligature_per_first_glyph_count_list, + hb_array_t<const HBGlyphID16> ligatures_list, + hb_array_t<const unsigned int> component_count_list, + hb_array_t<const HBGlyphID16> component_list /* Starting from second for each ligature */) + { + TRACE_SERIALIZE (this); + if (unlikely (!Lookup::serialize (c, SubTable::Ligature, lookup_props, 1))) return_trace (false); + if (c->push<SubTable> ()->u.ligature. + serialize (c, + first_glyphs, + ligature_per_first_glyph_count_list, + ligatures_list, + component_count_list, + component_list)) + { + c->add_link (get_subtables<SubTable> ()[0], c->pop_pack ()); + return_trace (true); + } + c->pop_discard (); + return_trace (false); + } + + template <typename context_t> + static inline typename context_t::return_t dispatch_recurse_func (context_t *c, unsigned int lookup_index); + + static inline typename hb_closure_context_t::return_t closure_glyphs_recurse_func (hb_closure_context_t *c, unsigned lookup_index, hb_set_t *covered_seq_indices, unsigned seq_index, unsigned end_index); + + static inline hb_closure_context_t::return_t dispatch_closure_recurse_func (hb_closure_context_t *c, unsigned lookup_index, hb_set_t *covered_seq_indices, unsigned seq_index, unsigned end_index) + { + if (!c->should_visit_lookup (lookup_index)) + return hb_empty_t (); + + hb_closure_context_t::return_t ret = closure_glyphs_recurse_func (c, lookup_index, covered_seq_indices, seq_index, end_index); + + /* While in theory we should flush here, it will cause timeouts because a recursive + * lookup can keep growing the glyph set. Skip, and outer loop will retry up to + * HB_CLOSURE_MAX_STAGES time, which should be enough for every realistic font. */ + //c->flush (); + + return ret; + } + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const + { return Lookup::dispatch<SubTable> (c, std::forward<Ts> (ds)...); } + + bool subset (hb_subset_context_t *c) const + { return Lookup::subset<SubTable> (c); } +}; + + +} +} +} + +#endif /* OT_LAYOUT_GSUB_SUBSTLOOKUP_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/GSUB/SubstLookupSubTable.hh b/gfx/harfbuzz/src/OT/Layout/GSUB/SubstLookupSubTable.hh new file mode 100644 index 0000000000..a525fba039 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/GSUB/SubstLookupSubTable.hh @@ -0,0 +1,77 @@ +#ifndef OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH +#define OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH + +#include "Common.hh" +#include "SingleSubst.hh" +#include "MultipleSubst.hh" +#include "AlternateSubst.hh" +#include "LigatureSubst.hh" +#include "ContextSubst.hh" +#include "ChainContextSubst.hh" +#include "ExtensionSubst.hh" +#include "ReverseChainSingleSubst.hh" + +namespace OT { +namespace Layout { +namespace GSUB_impl { + +struct SubstLookupSubTable +{ + friend struct ::OT::Lookup; + friend struct SubstLookup; + + protected: + union { + SingleSubst single; + MultipleSubst multiple; + AlternateSubst alternate; + LigatureSubst ligature; + ContextSubst context; + ChainContextSubst chainContext; + ExtensionSubst extension; + ReverseChainSingleSubst reverseChainContextSingle; + } u; + public: + DEFINE_SIZE_MIN (0); + + enum Type { + Single = 1, + Multiple = 2, + Alternate = 3, + Ligature = 4, + Context = 5, + ChainContext = 6, + Extension = 7, + ReverseChainSingle = 8 + }; + + template <typename context_t, typename ...Ts> + typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type, Ts&&... ds) const + { + TRACE_DISPATCH (this, lookup_type); + switch (lookup_type) { + case Single: return_trace (u.single.dispatch (c, std::forward<Ts> (ds)...)); + case Multiple: return_trace (u.multiple.dispatch (c, std::forward<Ts> (ds)...)); + case Alternate: return_trace (u.alternate.dispatch (c, std::forward<Ts> (ds)...)); + case Ligature: return_trace (u.ligature.dispatch (c, std::forward<Ts> (ds)...)); + case Context: return_trace (u.context.dispatch (c, std::forward<Ts> (ds)...)); + case ChainContext: return_trace (u.chainContext.dispatch (c, std::forward<Ts> (ds)...)); + case Extension: return_trace (u.extension.dispatch (c, std::forward<Ts> (ds)...)); + case ReverseChainSingle: return_trace (u.reverseChainContextSingle.dispatch (c, std::forward<Ts> (ds)...)); + default: return_trace (c->default_return_value ()); + } + } + + bool intersects (const hb_set_t *glyphs, unsigned int lookup_type) const + { + hb_intersects_context_t c (glyphs); + return dispatch (&c, lookup_type); + } +}; + + +} +} +} + +#endif /* HB_OT_LAYOUT_GSUB_SUBSTLOOKUPSUBTABLE_HH */ diff --git a/gfx/harfbuzz/src/OT/Layout/types.hh b/gfx/harfbuzz/src/OT/Layout/types.hh new file mode 100644 index 0000000000..6a43403e94 --- /dev/null +++ b/gfx/harfbuzz/src/OT/Layout/types.hh @@ -0,0 +1,66 @@ +/* + * Copyright © 2007,2008,2009 Red Hat, Inc. + * Copyright © 2010,2012 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. + * + * Red Hat Author(s): Behdad Esfahbod + * Google Author(s): Behdad Esfahbod, Garret Rieger + */ + +#ifndef OT_LAYOUT_TYPES_HH +#define OT_LAYOUT_TYPES_HH + +namespace OT { +namespace Layout { + +struct SmallTypes { + static constexpr unsigned size = 2; + using large_int = uint32_t; + using HBUINT = HBUINT16; + using HBGlyphID = HBGlyphID16; + using Offset = Offset16; + template <typename Type, bool has_null=true> + using OffsetTo = OT::Offset16To<Type, has_null>; + template <typename Type> + using ArrayOf = OT::Array16Of<Type>; + template <typename Type> + using SortedArrayOf = OT::SortedArray16Of<Type>; +}; + +struct MediumTypes { + static constexpr unsigned size = 3; + using large_int = uint64_t; + using HBUINT = HBUINT24; + using HBGlyphID = HBGlyphID24; + using Offset = Offset24; + template <typename Type, bool has_null=true> + using OffsetTo = OT::Offset24To<Type, has_null>; + template <typename Type> + using ArrayOf = OT::Array24Of<Type>; + template <typename Type> + using SortedArrayOf = OT::SortedArray24Of<Type>; +}; + +} +} + +#endif /* OT_LAYOUT_TYPES_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/CompositeGlyph.hh b/gfx/harfbuzz/src/OT/glyf/CompositeGlyph.hh new file mode 100644 index 0000000000..edf8cd8797 --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/CompositeGlyph.hh @@ -0,0 +1,369 @@ +#ifndef OT_GLYF_COMPOSITEGLYPH_HH +#define OT_GLYF_COMPOSITEGLYPH_HH + + +#include "../../hb-open-type.hh" +#include "composite-iter.hh" + + +namespace OT { +namespace glyf_impl { + + +struct CompositeGlyphRecord +{ + protected: + enum composite_glyph_flag_t + { + ARG_1_AND_2_ARE_WORDS = 0x0001, + ARGS_ARE_XY_VALUES = 0x0002, + ROUND_XY_TO_GRID = 0x0004, + WE_HAVE_A_SCALE = 0x0008, + MORE_COMPONENTS = 0x0020, + WE_HAVE_AN_X_AND_Y_SCALE = 0x0040, + WE_HAVE_A_TWO_BY_TWO = 0x0080, + WE_HAVE_INSTRUCTIONS = 0x0100, + USE_MY_METRICS = 0x0200, + OVERLAP_COMPOUND = 0x0400, + SCALED_COMPONENT_OFFSET = 0x0800, + UNSCALED_COMPONENT_OFFSET = 0x1000, +#ifndef HB_NO_BEYOND_64K + GID_IS_24BIT = 0x2000 +#endif + }; + + public: + unsigned int get_size () const + { + unsigned int size = min_size; + /* glyphIndex is 24bit instead of 16bit */ +#ifndef HB_NO_BEYOND_64K + if (flags & GID_IS_24BIT) size += HBGlyphID24::static_size - HBGlyphID16::static_size; +#endif + /* arg1 and 2 are int16 */ + if (flags & ARG_1_AND_2_ARE_WORDS) size += 4; + /* arg1 and 2 are int8 */ + else size += 2; + + /* One x 16 bit (scale) */ + if (flags & WE_HAVE_A_SCALE) size += 2; + /* Two x 16 bit (xscale, yscale) */ + else if (flags & WE_HAVE_AN_X_AND_Y_SCALE) size += 4; + /* Four x 16 bit (xscale, scale01, scale10, yscale) */ + else if (flags & WE_HAVE_A_TWO_BY_TWO) size += 8; + + return size; + } + + void drop_instructions_flag () { flags = (uint16_t) flags & ~WE_HAVE_INSTRUCTIONS; } + void set_overlaps_flag () + { + flags = (uint16_t) flags | OVERLAP_COMPOUND; + } + + bool has_instructions () const { return flags & WE_HAVE_INSTRUCTIONS; } + + bool has_more () const { return flags & MORE_COMPONENTS; } + bool is_use_my_metrics () const { return flags & USE_MY_METRICS; } + bool is_anchored () const { return !(flags & ARGS_ARE_XY_VALUES); } + void get_anchor_points (unsigned int &point1, unsigned int &point2) const + { + const auto *p = &StructAfter<const HBUINT8> (flags); +#ifndef HB_NO_BEYOND_64K + if (flags & GID_IS_24BIT) + p += HBGlyphID24::static_size; + else +#endif + p += HBGlyphID16::static_size; + if (flags & ARG_1_AND_2_ARE_WORDS) + { + point1 = ((const HBUINT16 *) p)[0]; + point2 = ((const HBUINT16 *) p)[1]; + } + else + { + point1 = p[0]; + point2 = p[1]; + } + } + + void transform_points (contour_point_vector_t &points) const + { + float matrix[4]; + contour_point_t trans; + if (get_transformation (matrix, trans)) + { + if (scaled_offsets ()) + { + points.translate (trans); + points.transform (matrix); + } + else + { + points.transform (matrix); + points.translate (trans); + } + } + } + + unsigned compile_with_deltas (const contour_point_t &p_delta, + char *out) const + { + const HBINT8 *p = &StructAfter<const HBINT8> (flags); +#ifndef HB_NO_BEYOND_64K + if (flags & GID_IS_24BIT) + p += HBGlyphID24::static_size; + else +#endif + p += HBGlyphID16::static_size; + + unsigned len = get_size (); + unsigned len_before_val = (const char *)p - (const char *)this; + if (flags & ARG_1_AND_2_ARE_WORDS) + { + // no overflow, copy and update value with deltas + hb_memcpy (out, this, len); + + const HBINT16 *px = reinterpret_cast<const HBINT16 *> (p); + HBINT16 *o = reinterpret_cast<HBINT16 *> (out + len_before_val); + o[0] = px[0] + roundf (p_delta.x); + o[1] = px[1] + roundf (p_delta.y); + } + else + { + int new_x = p[0] + roundf (p_delta.x); + int new_y = p[1] + roundf (p_delta.y); + if (new_x <= 127 && new_x >= -128 && + new_y <= 127 && new_y >= -128) + { + hb_memcpy (out, this, len); + HBINT8 *o = reinterpret_cast<HBINT8 *> (out + len_before_val); + o[0] = new_x; + o[1] = new_y; + } + else + { + // int8 overflows after deltas applied + hb_memcpy (out, this, len_before_val); + + //update flags + CompositeGlyphRecord *o = reinterpret_cast<CompositeGlyphRecord *> (out); + o->flags = flags | ARG_1_AND_2_ARE_WORDS; + out += len_before_val; + + HBINT16 new_value; + new_value = new_x; + hb_memcpy (out, &new_value, HBINT16::static_size); + out += HBINT16::static_size; + + new_value = new_y; + hb_memcpy (out, &new_value, HBINT16::static_size); + out += HBINT16::static_size; + + hb_memcpy (out, p+2, len - len_before_val - 2); + len += 2; + } + } + return len; + } + + protected: + bool scaled_offsets () const + { return (flags & (SCALED_COMPONENT_OFFSET | UNSCALED_COMPONENT_OFFSET)) == SCALED_COMPONENT_OFFSET; } + + bool get_transformation (float (&matrix)[4], contour_point_t &trans) const + { + matrix[0] = matrix[3] = 1.f; + matrix[1] = matrix[2] = 0.f; + + const auto *p = &StructAfter<const HBINT8> (flags); +#ifndef HB_NO_BEYOND_64K + if (flags & GID_IS_24BIT) + p += HBGlyphID24::static_size; + else +#endif + p += HBGlyphID16::static_size; + int tx, ty; + if (flags & ARG_1_AND_2_ARE_WORDS) + { + tx = *(const HBINT16 *) p; + p += HBINT16::static_size; + ty = *(const HBINT16 *) p; + p += HBINT16::static_size; + } + else + { + tx = *p++; + ty = *p++; + } + if (is_anchored ()) tx = ty = 0; + + trans.init ((float) tx, (float) ty); + + { + const F2DOT14 *points = (const F2DOT14 *) p; + if (flags & WE_HAVE_A_SCALE) + { + matrix[0] = matrix[3] = points[0].to_float (); + return true; + } + else if (flags & WE_HAVE_AN_X_AND_Y_SCALE) + { + matrix[0] = points[0].to_float (); + matrix[3] = points[1].to_float (); + return true; + } + else if (flags & WE_HAVE_A_TWO_BY_TWO) + { + matrix[0] = points[0].to_float (); + matrix[1] = points[1].to_float (); + matrix[2] = points[2].to_float (); + matrix[3] = points[3].to_float (); + return true; + } + } + return tx || ty; + } + + public: + hb_codepoint_t get_gid () const + { +#ifndef HB_NO_BEYOND_64K + if (flags & GID_IS_24BIT) + return StructAfter<const HBGlyphID24> (flags); + else +#endif + return StructAfter<const HBGlyphID16> (flags); + } + void set_gid (hb_codepoint_t gid) + { +#ifndef HB_NO_BEYOND_64K + if (flags & GID_IS_24BIT) + StructAfter<HBGlyphID24> (flags) = gid; + else +#endif + /* TODO assert? */ + StructAfter<HBGlyphID16> (flags) = gid; + } + + protected: + HBUINT16 flags; + HBUINT24 pad; + public: + DEFINE_SIZE_MIN (4); +}; + +using composite_iter_t = composite_iter_tmpl<CompositeGlyphRecord>; + +struct CompositeGlyph +{ + const GlyphHeader &header; + hb_bytes_t bytes; + CompositeGlyph (const GlyphHeader &header_, hb_bytes_t bytes_) : + header (header_), bytes (bytes_) {} + + composite_iter_t iter () const + { return composite_iter_t (bytes, &StructAfter<CompositeGlyphRecord, GlyphHeader> (header)); } + + unsigned int instructions_length (hb_bytes_t bytes) const + { + unsigned int start = bytes.length; + unsigned int end = bytes.length; + const CompositeGlyphRecord *last = nullptr; + for (auto &item : iter ()) + last = &item; + if (unlikely (!last)) return 0; + + if (last->has_instructions ()) + start = (char *) last - &bytes + last->get_size (); + if (unlikely (start > end)) return 0; + return end - start; + } + + /* Trimming for composites not implemented. + * If removing hints it falls out of that. */ + const hb_bytes_t trim_padding () const { return bytes; } + + void drop_hints () + { + for (const auto &_ : iter ()) + const_cast<CompositeGlyphRecord &> (_).drop_instructions_flag (); + } + + /* Chop instructions off the end */ + void drop_hints_bytes (hb_bytes_t &dest_start) const + { dest_start = bytes.sub_array (0, bytes.length - instructions_length (bytes)); } + + void set_overlaps_flag () + { + CompositeGlyphRecord& glyph_chain = const_cast<CompositeGlyphRecord &> ( + StructAfter<CompositeGlyphRecord, GlyphHeader> (header)); + if (!bytes.check_range(&glyph_chain, CompositeGlyphRecord::min_size)) + return; + glyph_chain.set_overlaps_flag (); + } + + bool compile_bytes_with_deltas (const hb_bytes_t &source_bytes, + const contour_point_vector_t &deltas, + hb_bytes_t &dest_bytes /* OUT */) + { + if (source_bytes.length <= GlyphHeader::static_size || + header.numberOfContours != -1) + { + dest_bytes = hb_bytes_t (); + return true; + } + + unsigned source_len = source_bytes.length - GlyphHeader::static_size; + + /* try to allocate more memories than source glyph bytes + * in case that there might be an overflow for int8 value + * and we would need to use int16 instead */ + char *o = (char *) hb_calloc (source_len + source_len/2, sizeof (char)); + if (unlikely (!o)) return false; + + const CompositeGlyphRecord *c = reinterpret_cast<const CompositeGlyphRecord *> (source_bytes.arrayZ + GlyphHeader::static_size); + auto it = composite_iter_t (hb_bytes_t ((const char *)c, source_len), c); + + char *p = o; + unsigned i = 0, source_comp_len = 0; + for (const auto &component : it) + { + /* last 4 points in deltas are phantom points and should not be included */ + if (i >= deltas.length - 4) return false; + + unsigned comp_len = component.get_size (); + if (component.is_anchored ()) + { + hb_memcpy (p, &component, comp_len); + p += comp_len; + } + else + { + unsigned new_len = component.compile_with_deltas (deltas[i], p); + p += new_len; + } + i++; + source_comp_len += comp_len; + } + + //copy instructions if any + if (source_len > source_comp_len) + { + unsigned instr_len = source_len - source_comp_len; + hb_memcpy (p, (const char *)c + source_comp_len, instr_len); + p += instr_len; + } + + unsigned len = p - o; + dest_bytes = hb_bytes_t (o, len); + return true; + } +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_COMPOSITEGLYPH_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/Glyph.hh b/gfx/harfbuzz/src/OT/glyf/Glyph.hh new file mode 100644 index 0000000000..b7215b0170 --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/Glyph.hh @@ -0,0 +1,463 @@ +#ifndef OT_GLYF_GLYPH_HH +#define OT_GLYF_GLYPH_HH + + +#include "../../hb-open-type.hh" + +#include "GlyphHeader.hh" +#include "SimpleGlyph.hh" +#include "CompositeGlyph.hh" +#include "VarCompositeGlyph.hh" +#include "coord-setter.hh" + + +namespace OT { + +struct glyf_accelerator_t; + +namespace glyf_impl { + + +#ifndef HB_GLYF_MAX_POINTS +#define HB_GLYF_MAX_POINTS 10000 +#endif + + +enum phantom_point_index_t +{ + PHANTOM_LEFT = 0, + PHANTOM_RIGHT = 1, + PHANTOM_TOP = 2, + PHANTOM_BOTTOM = 3, + PHANTOM_COUNT = 4 +}; + +struct Glyph +{ + enum glyph_type_t { EMPTY, SIMPLE, COMPOSITE, VAR_COMPOSITE }; + + public: + composite_iter_t get_composite_iterator () const + { + if (type != COMPOSITE) return composite_iter_t (); + return CompositeGlyph (*header, bytes).iter (); + } + var_composite_iter_t get_var_composite_iterator () const + { + if (type != VAR_COMPOSITE) return var_composite_iter_t (); + return VarCompositeGlyph (*header, bytes).iter (); + } + + const hb_bytes_t trim_padding () const + { + switch (type) { + case COMPOSITE: return CompositeGlyph (*header, bytes).trim_padding (); + case SIMPLE: return SimpleGlyph (*header, bytes).trim_padding (); + default: return bytes; + } + } + + void drop_hints () + { + switch (type) { + case COMPOSITE: CompositeGlyph (*header, bytes).drop_hints (); return; + case SIMPLE: SimpleGlyph (*header, bytes).drop_hints (); return; + default: return; + } + } + + void set_overlaps_flag () + { + switch (type) { + case COMPOSITE: CompositeGlyph (*header, bytes).set_overlaps_flag (); return; + case SIMPLE: SimpleGlyph (*header, bytes).set_overlaps_flag (); return; + default: return; + } + } + + void drop_hints_bytes (hb_bytes_t &dest_start, hb_bytes_t &dest_end) const + { + switch (type) { + case COMPOSITE: CompositeGlyph (*header, bytes).drop_hints_bytes (dest_start); return; + case SIMPLE: SimpleGlyph (*header, bytes).drop_hints_bytes (dest_start, dest_end); return; + default: return; + } + } + + void update_mtx (const hb_subset_plan_t *plan, + int xMin, int yMax, + const contour_point_vector_t &all_points) const + { + hb_codepoint_t new_gid = 0; + if (!plan->new_gid_for_old_gid (gid, &new_gid)) + return; + + unsigned len = all_points.length; + float leftSideX = all_points[len - 4].x; + float rightSideX = all_points[len - 3].x; + float topSideY = all_points[len - 2].y; + float bottomSideY = all_points[len - 1].y; + + int hori_aw = roundf (rightSideX - leftSideX); + if (hori_aw < 0) hori_aw = 0; + int lsb = roundf (xMin - leftSideX); + plan->hmtx_map->set (new_gid, hb_pair (hori_aw, lsb)); + + int vert_aw = roundf (topSideY - bottomSideY); + if (vert_aw < 0) vert_aw = 0; + int tsb = roundf (topSideY - yMax); + plan->vmtx_map->set (new_gid, hb_pair (vert_aw, tsb)); + } + + bool compile_header_bytes (const hb_subset_plan_t *plan, + const contour_point_vector_t &all_points, + hb_bytes_t &dest_bytes /* OUT */) const + { + GlyphHeader *glyph_header = nullptr; + if (type != EMPTY && all_points.length > 4) + { + glyph_header = (GlyphHeader *) hb_calloc (1, GlyphHeader::static_size); + if (unlikely (!glyph_header)) return false; + } + + float xMin = 0, xMax = 0; + float yMin = 0, yMax = 0; + if (all_points.length > 4) + { + xMin = xMax = all_points[0].x; + yMin = yMax = all_points[0].y; + } + + for (unsigned i = 1; i < all_points.length - 4; i++) + { + float x = all_points[i].x; + float y = all_points[i].y; + xMin = hb_min (xMin, x); + xMax = hb_max (xMax, x); + yMin = hb_min (yMin, y); + yMax = hb_max (yMax, y); + } + + update_mtx (plan, roundf (xMin), roundf (yMax), all_points); + + /*for empty glyphs: all_points only include phantom points. + *just update metrics and then return */ + if (!glyph_header) + return true; + + glyph_header->numberOfContours = header->numberOfContours; + glyph_header->xMin = roundf (xMin); + glyph_header->yMin = roundf (yMin); + glyph_header->xMax = roundf (xMax); + glyph_header->yMax = roundf (yMax); + + dest_bytes = hb_bytes_t ((const char *)glyph_header, GlyphHeader::static_size); + return true; + } + + bool compile_bytes_with_deltas (const hb_subset_plan_t *plan, + hb_font_t *font, + const glyf_accelerator_t &glyf, + hb_bytes_t &dest_start, /* IN/OUT */ + hb_bytes_t &dest_end /* OUT */) + { + contour_point_vector_t all_points, deltas; + if (!get_points (font, glyf, all_points, &deltas, false, false)) + return false; + + // .notdef, set type to empty so we only update metrics and don't compile bytes for + // it + if (gid == 0 && + !(plan->flags & HB_SUBSET_FLAGS_NOTDEF_OUTLINE)) + type = EMPTY; + + switch (type) { + case COMPOSITE: + if (!CompositeGlyph (*header, bytes).compile_bytes_with_deltas (dest_start, + deltas, + dest_end)) + return false; + break; + case SIMPLE: + if (!SimpleGlyph (*header, bytes).compile_bytes_with_deltas (all_points, + plan->flags & HB_SUBSET_FLAGS_NO_HINTING, + dest_end)) + return false; + break; + default: + /* set empty bytes for empty glyph + * do not use source glyph's pointers */ + dest_start = hb_bytes_t (); + dest_end = hb_bytes_t (); + break; + } + + if (!compile_header_bytes (plan, all_points, dest_start)) + { + dest_end.fini (); + return false; + } + return true; + } + + + /* Note: Recursively calls itself. + * all_points includes phantom points + */ + template <typename accelerator_t> + bool get_points (hb_font_t *font, const accelerator_t &glyf_accelerator, + contour_point_vector_t &all_points /* OUT */, + contour_point_vector_t *deltas = nullptr, /* OUT */ + bool shift_points_hori = true, + bool use_my_metrics = true, + bool phantom_only = false, + hb_array_t<int> coords = hb_array_t<int> (), + unsigned int depth = 0) const + { + if (unlikely (depth > HB_MAX_NESTING_LEVEL)) return false; + + if (!coords) + coords = hb_array (font->coords, font->num_coords); + + contour_point_vector_t stack_points; + bool inplace = type == SIMPLE && all_points.length == 0; + /* Load into all_points if it's empty, as an optimization. */ + contour_point_vector_t &points = inplace ? all_points : stack_points; + + switch (type) { + case SIMPLE: + if (unlikely (!SimpleGlyph (*header, bytes).get_contour_points (points, phantom_only))) + return false; + break; + case COMPOSITE: + { + /* pseudo component points for each component in composite glyph */ + unsigned num_points = hb_len (CompositeGlyph (*header, bytes).iter ()); + if (unlikely (!points.resize (num_points))) return false; + break; + } +#ifndef HB_NO_VAR_COMPOSITES + case VAR_COMPOSITE: + { + for (auto &item : get_var_composite_iterator ()) + if (unlikely (!item.get_points (points))) return false; + } +#endif + default: + break; + } + + /* Init phantom points */ + if (unlikely (!points.resize (points.length + PHANTOM_COUNT))) return false; + hb_array_t<contour_point_t> phantoms = points.as_array ().sub_array (points.length - PHANTOM_COUNT, PHANTOM_COUNT); + { + int lsb = 0; + int h_delta = glyf_accelerator.hmtx->get_leading_bearing_without_var_unscaled (gid, &lsb) ? + (int) header->xMin - lsb : 0; + HB_UNUSED int tsb = 0; + int v_orig = (int) header->yMax + +#ifndef HB_NO_VERTICAL + ((void) glyf_accelerator.vmtx->get_leading_bearing_without_var_unscaled (gid, &tsb), tsb) +#else + 0 +#endif + ; + unsigned h_adv = glyf_accelerator.hmtx->get_advance_without_var_unscaled (gid); + unsigned v_adv = +#ifndef HB_NO_VERTICAL + glyf_accelerator.vmtx->get_advance_without_var_unscaled (gid) +#else + - font->face->get_upem () +#endif + ; + phantoms[PHANTOM_LEFT].x = h_delta; + phantoms[PHANTOM_RIGHT].x = h_adv + h_delta; + phantoms[PHANTOM_TOP].y = v_orig; + phantoms[PHANTOM_BOTTOM].y = v_orig - (int) v_adv; + } + + if (deltas != nullptr && depth == 0 && type == COMPOSITE) + { + if (unlikely (!deltas->resize (points.length))) return false; + deltas->copy_vector (points); + } + +#ifndef HB_NO_VAR + glyf_accelerator.gvar->apply_deltas_to_points (gid, + coords, + points.as_array ()); +#endif + + // mainly used by CompositeGlyph calculating new X/Y offset value so no need to extend it + // with child glyphs' points + if (deltas != nullptr && depth == 0 && type == COMPOSITE) + { + for (unsigned i = 0 ; i < points.length; i++) + { + deltas->arrayZ[i].x = points.arrayZ[i].x - deltas->arrayZ[i].x; + deltas->arrayZ[i].y = points.arrayZ[i].y - deltas->arrayZ[i].y; + } + } + + switch (type) { + case SIMPLE: + if (!inplace) + all_points.extend (points.as_array ()); + break; + case COMPOSITE: + { + contour_point_vector_t comp_points; + unsigned int comp_index = 0; + for (auto &item : get_composite_iterator ()) + { + comp_points.reset (); + + if (unlikely (!glyf_accelerator.glyph_for_gid (item.get_gid ()) + .get_points (font, + glyf_accelerator, + comp_points, + deltas, + shift_points_hori, + use_my_metrics, + phantom_only, + coords, + depth + 1))) + return false; + + /* Copy phantom points from component if USE_MY_METRICS flag set */ + if (use_my_metrics && item.is_use_my_metrics ()) + for (unsigned int i = 0; i < PHANTOM_COUNT; i++) + phantoms[i] = comp_points[comp_points.length - PHANTOM_COUNT + i]; + + /* Apply component transformation & translation */ + item.transform_points (comp_points); + + /* Apply translation from gvar */ + comp_points.translate (points[comp_index]); + + if (item.is_anchored ()) + { + unsigned int p1, p2; + item.get_anchor_points (p1, p2); + if (likely (p1 < all_points.length && p2 < comp_points.length)) + { + contour_point_t delta; + delta.init (all_points[p1].x - comp_points[p2].x, + all_points[p1].y - comp_points[p2].y); + + comp_points.translate (delta); + } + } + + all_points.extend (comp_points.as_array ().sub_array (0, comp_points.length - PHANTOM_COUNT)); + + if (all_points.length > HB_GLYF_MAX_POINTS) + return false; + + comp_index++; + } + + all_points.extend (phantoms); + } break; +#ifndef HB_NO_VAR_COMPOSITES + case VAR_COMPOSITE: + { + contour_point_vector_t comp_points; + hb_array_t<contour_point_t> points_left = points.as_array (); + for (auto &item : get_var_composite_iterator ()) + { + hb_array_t<contour_point_t> record_points = points_left.sub_array (0, item.get_num_points ()); + + comp_points.reset (); + + coord_setter_t coord_setter (coords); + item.set_variations (coord_setter, record_points); + + if (unlikely (!glyf_accelerator.glyph_for_gid (item.get_gid ()) + .get_points (font, + glyf_accelerator, + comp_points, + deltas, + shift_points_hori, + use_my_metrics, + phantom_only, + coord_setter.get_coords (), + depth + 1))) + return false; + + /* Apply component transformation */ + item.transform_points (record_points, comp_points); + + /* Copy phantom points from component if USE_MY_METRICS flag set */ + if (use_my_metrics && item.is_use_my_metrics ()) + for (unsigned int i = 0; i < PHANTOM_COUNT; i++) + phantoms[i] = comp_points[comp_points.length - PHANTOM_COUNT + i]; + + all_points.extend (comp_points.as_array ().sub_array (0, comp_points.length - PHANTOM_COUNT)); + + if (all_points.length > HB_GLYF_MAX_POINTS) + return false; + + points_left += item.get_num_points (); + } + all_points.extend (phantoms); + } break; +#endif + default: + all_points.extend (phantoms); + break; + } + + if (depth == 0 && shift_points_hori) /* Apply at top level */ + { + /* Undocumented rasterizer behavior: + * Shift points horizontally by the updated left side bearing + */ + contour_point_t delta; + delta.init (-phantoms[PHANTOM_LEFT].x, 0.f); + if (delta.x) all_points.translate (delta); + } + + return !all_points.in_error (); + } + + bool get_extents_without_var_scaled (hb_font_t *font, const glyf_accelerator_t &glyf_accelerator, + hb_glyph_extents_t *extents) const + { + if (type == EMPTY) return true; /* Empty glyph; zero extents. */ + return header->get_extents_without_var_scaled (font, glyf_accelerator, gid, extents); + } + + hb_bytes_t get_bytes () const { return bytes; } + + Glyph () : bytes (), + header (bytes.as<GlyphHeader> ()), + gid (-1), + type(EMPTY) + {} + + Glyph (hb_bytes_t bytes_, + hb_codepoint_t gid_ = (unsigned) -1) : bytes (bytes_), + header (bytes.as<GlyphHeader> ()), + gid (gid_) + { + int num_contours = header->numberOfContours; + if (unlikely (num_contours == 0)) type = EMPTY; + else if (num_contours > 0) type = SIMPLE; + else if (num_contours == -2) type = VAR_COMPOSITE; + else type = COMPOSITE; /* negative numbers */ + } + + protected: + hb_bytes_t bytes; + const GlyphHeader *header; + hb_codepoint_t gid; + unsigned type; +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_GLYPH_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/GlyphHeader.hh b/gfx/harfbuzz/src/OT/glyf/GlyphHeader.hh new file mode 100644 index 0000000000..e4a9168b79 --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/GlyphHeader.hh @@ -0,0 +1,50 @@ +#ifndef OT_GLYF_GLYPHHEADER_HH +#define OT_GLYF_GLYPHHEADER_HH + + +#include "../../hb-open-type.hh" + + +namespace OT { +namespace glyf_impl { + + +struct GlyphHeader +{ + bool has_data () const { return numberOfContours; } + + template <typename accelerator_t> + bool get_extents_without_var_scaled (hb_font_t *font, const accelerator_t &glyf_accelerator, + hb_codepoint_t gid, hb_glyph_extents_t *extents) const + { + /* Undocumented rasterizer behavior: shift glyph to the left by (lsb - xMin), i.e., xMin = lsb */ + /* extents->x_bearing = hb_min (glyph_header.xMin, glyph_header.xMax); */ + int lsb = hb_min (xMin, xMax); + (void) glyf_accelerator.hmtx->get_leading_bearing_without_var_unscaled (gid, &lsb); + extents->x_bearing = font->em_scale_x (lsb); + extents->y_bearing = font->em_scale_y (hb_max (yMin, yMax)); + extents->width = font->em_scale_x (hb_max (xMin, xMax) - hb_min (xMin, xMax)); + extents->height = font->em_scale_y (hb_min (yMin, yMax) - hb_max (yMin, yMax)); + + return true; + } + + HBINT16 numberOfContours; + /* If the number of contours is + * greater than or equal to zero, + * this is a simple glyph; if negative, + * this is a composite glyph. */ + FWORD xMin; /* Minimum x for coordinate data. */ + FWORD yMin; /* Minimum y for coordinate data. */ + FWORD xMax; /* Maximum x for coordinate data. */ + FWORD yMax; /* Maximum y for coordinate data. */ + public: + DEFINE_SIZE_STATIC (10); +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_GLYPHHEADER_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/SimpleGlyph.hh b/gfx/harfbuzz/src/OT/glyf/SimpleGlyph.hh new file mode 100644 index 0000000000..2b4aa99d25 --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/SimpleGlyph.hh @@ -0,0 +1,339 @@ +#ifndef OT_GLYF_SIMPLEGLYPH_HH +#define OT_GLYF_SIMPLEGLYPH_HH + + +#include "../../hb-open-type.hh" + + +namespace OT { +namespace glyf_impl { + + +struct SimpleGlyph +{ + enum simple_glyph_flag_t + { + FLAG_ON_CURVE = 0x01, + FLAG_X_SHORT = 0x02, + FLAG_Y_SHORT = 0x04, + FLAG_REPEAT = 0x08, + FLAG_X_SAME = 0x10, + FLAG_Y_SAME = 0x20, + FLAG_OVERLAP_SIMPLE = 0x40, + FLAG_RESERVED2 = 0x80 + }; + + const GlyphHeader &header; + hb_bytes_t bytes; + SimpleGlyph (const GlyphHeader &header_, hb_bytes_t bytes_) : + header (header_), bytes (bytes_) {} + + unsigned int instruction_len_offset () const + { return GlyphHeader::static_size + 2 * header.numberOfContours; } + + unsigned int length (unsigned int instruction_len) const + { return instruction_len_offset () + 2 + instruction_len; } + + unsigned int instructions_length () const + { + unsigned int instruction_length_offset = instruction_len_offset (); + if (unlikely (instruction_length_offset + 2 > bytes.length)) return 0; + + const HBUINT16 &instructionLength = StructAtOffset<HBUINT16> (&bytes, instruction_length_offset); + /* Out of bounds of the current glyph */ + if (unlikely (length (instructionLength) > bytes.length)) return 0; + return instructionLength; + } + + const hb_bytes_t trim_padding () const + { + /* based on FontTools _g_l_y_f.py::trim */ + const uint8_t *glyph = (uint8_t*) bytes.arrayZ; + const uint8_t *glyph_end = glyph + bytes.length; + /* simple glyph w/contours, possibly trimmable */ + glyph += instruction_len_offset (); + + if (unlikely (glyph + 2 >= glyph_end)) return hb_bytes_t (); + unsigned int num_coordinates = StructAtOffset<HBUINT16> (glyph - 2, 0) + 1; + unsigned int num_instructions = StructAtOffset<HBUINT16> (glyph, 0); + + glyph += 2 + num_instructions; + + unsigned int coord_bytes = 0; + unsigned int coords_with_flags = 0; + while (glyph < glyph_end) + { + uint8_t flag = *glyph; + glyph++; + + unsigned int repeat = 1; + if (flag & FLAG_REPEAT) + { + if (unlikely (glyph >= glyph_end)) return hb_bytes_t (); + repeat = *glyph + 1; + glyph++; + } + + unsigned int xBytes, yBytes; + xBytes = yBytes = 0; + if (flag & FLAG_X_SHORT) xBytes = 1; + else if ((flag & FLAG_X_SAME) == 0) xBytes = 2; + + if (flag & FLAG_Y_SHORT) yBytes = 1; + else if ((flag & FLAG_Y_SAME) == 0) yBytes = 2; + + coord_bytes += (xBytes + yBytes) * repeat; + coords_with_flags += repeat; + if (coords_with_flags >= num_coordinates) break; + } + + if (unlikely (coords_with_flags != num_coordinates)) return hb_bytes_t (); + return bytes.sub_array (0, bytes.length + coord_bytes - (glyph_end - glyph)); + } + + /* zero instruction length */ + void drop_hints () + { + GlyphHeader &glyph_header = const_cast<GlyphHeader &> (header); + (HBUINT16 &) StructAtOffset<HBUINT16> (&glyph_header, instruction_len_offset ()) = 0; + } + + void drop_hints_bytes (hb_bytes_t &dest_start, hb_bytes_t &dest_end) const + { + unsigned int instructions_len = instructions_length (); + unsigned int glyph_length = length (instructions_len); + dest_start = bytes.sub_array (0, glyph_length - instructions_len); + dest_end = bytes.sub_array (glyph_length, bytes.length - glyph_length); + } + + void set_overlaps_flag () + { + if (unlikely (!header.numberOfContours)) return; + + unsigned flags_offset = length (instructions_length ()); + if (unlikely (flags_offset + 1 > bytes.length)) return; + + HBUINT8 &first_flag = (HBUINT8 &) StructAtOffset<HBUINT16> (&bytes, flags_offset); + first_flag = (uint8_t) first_flag | FLAG_OVERLAP_SIMPLE; + } + + static bool read_flags (const HBUINT8 *&p /* IN/OUT */, + contour_point_vector_t &points_ /* IN/OUT */, + const HBUINT8 *end) + { + unsigned count = points_.length; + for (unsigned int i = 0; i < count;) + { + if (unlikely (p + 1 > end)) return false; + uint8_t flag = *p++; + points_.arrayZ[i++].flag = flag; + if (flag & FLAG_REPEAT) + { + if (unlikely (p + 1 > end)) return false; + unsigned int repeat_count = *p++; + unsigned stop = hb_min (i + repeat_count, count); + for (; i < stop; i++) + points_.arrayZ[i].flag = flag; + } + } + return true; + } + + static bool read_points (const HBUINT8 *&p /* IN/OUT */, + contour_point_vector_t &points_ /* IN/OUT */, + const HBUINT8 *end, + float contour_point_t::*m, + const simple_glyph_flag_t short_flag, + const simple_glyph_flag_t same_flag) + { + int v = 0; + + unsigned count = points_.length; + for (unsigned i = 0; i < count; i++) + { + unsigned flag = points_[i].flag; + if (flag & short_flag) + { + if (unlikely (p + 1 > end)) return false; + if (flag & same_flag) + v += *p++; + else + v -= *p++; + } + else + { + if (!(flag & same_flag)) + { + if (unlikely (p + HBINT16::static_size > end)) return false; + v += *(const HBINT16 *) p; + p += HBINT16::static_size; + } + } + points_.arrayZ[i].*m = v; + } + return true; + } + + bool get_contour_points (contour_point_vector_t &points_ /* OUT */, + bool phantom_only = false) const + { + const HBUINT16 *endPtsOfContours = &StructAfter<HBUINT16> (header); + int num_contours = header.numberOfContours; + assert (num_contours); + /* One extra item at the end, for the instruction-count below. */ + if (unlikely (!bytes.check_range (&endPtsOfContours[num_contours]))) return false; + unsigned int num_points = endPtsOfContours[num_contours - 1] + 1; + + points_.alloc (num_points + 4); // Allocate for phantom points, to avoid a possible copy + if (!points_.resize (num_points)) return false; + if (phantom_only) return true; + + for (int i = 0; i < num_contours; i++) + points_[endPtsOfContours[i]].is_end_point = true; + + /* Skip instructions */ + const HBUINT8 *p = &StructAtOffset<HBUINT8> (&endPtsOfContours[num_contours + 1], + endPtsOfContours[num_contours]); + + if (unlikely ((const char *) p < bytes.arrayZ)) return false; /* Unlikely overflow */ + const HBUINT8 *end = (const HBUINT8 *) (bytes.arrayZ + bytes.length); + if (unlikely (p >= end)) return false; + + /* Read x & y coordinates */ + return read_flags (p, points_, end) + && read_points (p, points_, end, &contour_point_t::x, + FLAG_X_SHORT, FLAG_X_SAME) + && read_points (p, points_, end, &contour_point_t::y, + FLAG_Y_SHORT, FLAG_Y_SAME); + } + + static void encode_coord (int value, + uint8_t &flag, + const simple_glyph_flag_t short_flag, + const simple_glyph_flag_t same_flag, + hb_vector_t<uint8_t> &coords /* OUT */) + { + if (value == 0) + { + flag |= same_flag; + } + else if (value >= -255 && value <= 255) + { + flag |= short_flag; + if (value > 0) flag |= same_flag; + else value = -value; + + coords.arrayZ[coords.length++] = (uint8_t) value; + } + else + { + int16_t val = value; + coords.arrayZ[coords.length++] = val >> 8; + coords.arrayZ[coords.length++] = val & 0xff; + } + } + + static void encode_flag (uint8_t &flag, + uint8_t &repeat, + uint8_t lastflag, + hb_vector_t<uint8_t> &flags /* OUT */) + { + if (flag == lastflag && repeat != 255) + { + repeat++; + if (repeat == 1) + { + /* We know there's room. */ + flags.arrayZ[flags.length++] = flag; + } + else + { + unsigned len = flags.length; + flags.arrayZ[len-2] = flag | FLAG_REPEAT; + flags.arrayZ[len-1] = repeat; + } + } + else + { + repeat = 0; + flags.push (flag); + } + } + + bool compile_bytes_with_deltas (const contour_point_vector_t &all_points, + bool no_hinting, + hb_bytes_t &dest_bytes /* OUT */) + { + if (header.numberOfContours == 0 || all_points.length <= 4) + { + dest_bytes = hb_bytes_t (); + return true; + } + unsigned num_points = all_points.length - 4; + + hb_vector_t<uint8_t> flags, x_coords, y_coords; + if (unlikely (!flags.alloc (num_points))) return false; + if (unlikely (!x_coords.alloc (2*num_points))) return false; + if (unlikely (!y_coords.alloc (2*num_points))) return false; + + uint8_t lastflag = 255, repeat = 0; + int prev_x = 0, prev_y = 0; + + for (unsigned i = 0; i < num_points; i++) + { + uint8_t flag = all_points.arrayZ[i].flag; + flag &= FLAG_ON_CURVE + FLAG_OVERLAP_SIMPLE; + + int cur_x = roundf (all_points.arrayZ[i].x); + int cur_y = roundf (all_points.arrayZ[i].y); + encode_coord (cur_x - prev_x, flag, FLAG_X_SHORT, FLAG_X_SAME, x_coords); + encode_coord (cur_y - prev_y, flag, FLAG_Y_SHORT, FLAG_Y_SAME, y_coords); + encode_flag (flag, repeat, lastflag, flags); + + prev_x = cur_x; + prev_y = cur_y; + lastflag = flag; + } + + unsigned len_before_instrs = 2 * header.numberOfContours + 2; + unsigned len_instrs = instructions_length (); + unsigned total_len = len_before_instrs + flags.length + x_coords.length + y_coords.length; + + if (!no_hinting) + total_len += len_instrs; + + char *p = (char *) hb_malloc (total_len); + if (unlikely (!p)) return false; + + const char *src = bytes.arrayZ + GlyphHeader::static_size; + char *cur = p; + hb_memcpy (p, src, len_before_instrs); + + cur += len_before_instrs; + src += len_before_instrs; + + if (!no_hinting) + { + hb_memcpy (cur, src, len_instrs); + cur += len_instrs; + } + + hb_memcpy (cur, flags.arrayZ, flags.length); + cur += flags.length; + + hb_memcpy (cur, x_coords.arrayZ, x_coords.length); + cur += x_coords.length; + + hb_memcpy (cur, y_coords.arrayZ, y_coords.length); + + dest_bytes = hb_bytes_t (p, total_len); + return true; + } +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_SIMPLEGLYPH_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/SubsetGlyph.hh b/gfx/harfbuzz/src/OT/glyf/SubsetGlyph.hh new file mode 100644 index 0000000000..1a0370c757 --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/SubsetGlyph.hh @@ -0,0 +1,93 @@ +#ifndef OT_GLYF_SUBSETGLYPH_HH +#define OT_GLYF_SUBSETGLYPH_HH + + +#include "../../hb-open-type.hh" + + +namespace OT { + +struct glyf_accelerator_t; + +namespace glyf_impl { + + +struct SubsetGlyph +{ + hb_codepoint_t old_gid; + Glyph source_glyph; + hb_bytes_t dest_start; /* region of source_glyph to copy first */ + hb_bytes_t dest_end; /* region of source_glyph to copy second */ + + bool serialize (hb_serialize_context_t *c, + bool use_short_loca, + const hb_subset_plan_t *plan, + hb_font_t *font) + { + TRACE_SERIALIZE (this); + + if (font) + { + const OT::glyf_accelerator_t &glyf = *font->face->table.glyf; + if (!this->compile_bytes_with_deltas (plan, font, glyf)) + return_trace (false); + } + + hb_bytes_t dest_glyph = dest_start.copy (c); + dest_glyph = hb_bytes_t (&dest_glyph, dest_glyph.length + dest_end.copy (c).length); + unsigned int pad_length = use_short_loca ? padding () : 0; + DEBUG_MSG (SUBSET, nullptr, "serialize %d byte glyph, width %d pad %d", dest_glyph.length, dest_glyph.length + pad_length, pad_length); + + HBUINT8 pad; + pad = 0; + while (pad_length > 0) + { + c->embed (pad); + pad_length--; + } + + if (unlikely (!dest_glyph.length)) return_trace (true); + + /* update components gids */ + for (auto &_ : Glyph (dest_glyph).get_composite_iterator ()) + { + hb_codepoint_t new_gid; + if (plan->new_gid_for_old_gid (_.get_gid(), &new_gid)) + const_cast<CompositeGlyphRecord &> (_).set_gid (new_gid); + } + + if (plan->flags & HB_SUBSET_FLAGS_NO_HINTING) + Glyph (dest_glyph).drop_hints (); + + if (plan->flags & HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG) + Glyph (dest_glyph).set_overlaps_flag (); + + return_trace (true); + } + + bool compile_bytes_with_deltas (const hb_subset_plan_t *plan, + hb_font_t *font, + const glyf_accelerator_t &glyf) + { return source_glyph.compile_bytes_with_deltas (plan, font, glyf, dest_start, dest_end); } + + void free_compiled_bytes () + { + dest_start.fini (); + dest_end.fini (); + } + + void drop_hints_bytes () + { source_glyph.drop_hints_bytes (dest_start, dest_end); } + + unsigned int length () const { return dest_start.length + dest_end.length; } + /* pad to 2 to ensure 2-byte loca will be ok */ + unsigned int padding () const { return length () % 2; } + unsigned int padded_size () const { return length () + padding (); } +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_SUBSETGLYPH_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh b/gfx/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh new file mode 100644 index 0000000000..0f4c71c83d --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/VarCompositeGlyph.hh @@ -0,0 +1,353 @@ +#ifndef OT_GLYF_VARCOMPOSITEGLYPH_HH +#define OT_GLYF_VARCOMPOSITEGLYPH_HH + + +#include "../../hb-open-type.hh" +#include "coord-setter.hh" + + +namespace OT { +namespace glyf_impl { + + +struct VarCompositeGlyphRecord +{ + protected: + enum var_composite_glyph_flag_t + { + USE_MY_METRICS = 0x0001, + AXIS_INDICES_ARE_SHORT = 0x0002, + UNIFORM_SCALE = 0x0004, + HAVE_TRANSLATE_X = 0x0008, + HAVE_TRANSLATE_Y = 0x0010, + HAVE_ROTATION = 0x0020, + HAVE_SCALE_X = 0x0040, + HAVE_SCALE_Y = 0x0080, + HAVE_SKEW_X = 0x0100, + HAVE_SKEW_Y = 0x0200, + HAVE_TCENTER_X = 0x0400, + HAVE_TCENTER_Y = 0x0800, + GID_IS_24 = 0x1000, + AXES_HAVE_VARIATION = 0x2000, + }; + + public: + + unsigned int get_size () const + { + unsigned int size = min_size; + + unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 4 : 3; + size += numAxes * axis_width; + + // gid + size += 2; + if (flags & GID_IS_24) size += 1; + + if (flags & HAVE_TRANSLATE_X) size += 2; + if (flags & HAVE_TRANSLATE_Y) size += 2; + if (flags & HAVE_ROTATION) size += 2; + if (flags & HAVE_SCALE_X) size += 2; + if (flags & HAVE_SCALE_Y) size += 2; + if (flags & HAVE_SKEW_X) size += 2; + if (flags & HAVE_SKEW_Y) size += 2; + if (flags & HAVE_TCENTER_X) size += 2; + if (flags & HAVE_TCENTER_Y) size += 2; + + return size; + } + + bool has_more () const { return true; } + + bool is_use_my_metrics () const { return flags & USE_MY_METRICS; } + + hb_codepoint_t get_gid () const + { + if (flags & GID_IS_24) + return StructAfter<const HBGlyphID24> (numAxes); + else + return StructAfter<const HBGlyphID16> (numAxes); + } + + unsigned get_numAxes () const + { + return numAxes; + } + + unsigned get_num_points () const + { + unsigned num = 0; + if (flags & AXES_HAVE_VARIATION) num += numAxes; + if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y)) num++; + if (flags & HAVE_ROTATION) num++; + if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y)) num++; + if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y)) num++; + if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y)) num++; + return num; + } + + void transform_points (hb_array_t<contour_point_t> record_points, + contour_point_vector_t &points) const + { + float matrix[4]; + contour_point_t trans; + + get_transformation_from_points (record_points, matrix, trans); + + points.transform (matrix); + points.translate (trans); + } + + static inline void transform (float (&matrix)[4], contour_point_t &trans, + float (other)[6]) + { + // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L268 + float xx1 = other[0]; + float xy1 = other[1]; + float yx1 = other[2]; + float yy1 = other[3]; + float dx1 = other[4]; + float dy1 = other[5]; + float xx2 = matrix[0]; + float xy2 = matrix[1]; + float yx2 = matrix[2]; + float yy2 = matrix[3]; + float dx2 = trans.x; + float dy2 = trans.y; + + matrix[0] = xx1*xx2 + xy1*yx2; + matrix[1] = xx1*xy2 + xy1*yy2; + matrix[2] = yx1*xx2 + yy1*yx2; + matrix[3] = yx1*xy2 + yy1*yy2; + trans.x = xx2*dx1 + yx2*dy1 + dx2; + trans.y = xy2*dx1 + yy2*dy1 + dy2; + } + + static void translate (float (&matrix)[4], contour_point_t &trans, + float translateX, float translateY) + { + // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L213 + float other[6] = {1.f, 0.f, 0.f, 1.f, translateX, translateY}; + transform (matrix, trans, other); + } + + static void scale (float (&matrix)[4], contour_point_t &trans, + float scaleX, float scaleY) + { + // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L224 + float other[6] = {scaleX, 0.f, 0.f, scaleY, 0.f, 0.f}; + transform (matrix, trans, other); + } + + static void rotate (float (&matrix)[4], contour_point_t &trans, + float rotation) + { + // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L240 + rotation = rotation * float (M_PI); + float c = cosf (rotation); + float s = sinf (rotation); + float other[6] = {c, s, -s, c, 0.f, 0.f}; + transform (matrix, trans, other); + } + + static void skew (float (&matrix)[4], contour_point_t &trans, + float skewX, float skewY) + { + // https://github.com/fonttools/fonttools/blob/f66ee05f71c8b57b5f519ee975e95edcd1466e14/Lib/fontTools/misc/transform.py#L255 + skewX = skewX * float (M_PI); + skewY = skewY * float (M_PI); + float other[6] = {1.f, tanf (skewY), tanf (skewX), 1.f, 0.f, 0.f}; + transform (matrix, trans, other); + } + + bool get_points (contour_point_vector_t &points) const + { + float translateX = 0.f; + float translateY = 0.f; + float rotation = 0.f; + float scaleX = 1.f * (1 << 12); + float scaleY = 1.f * (1 << 12); + float skewX = 0.f; + float skewY = 0.f; + float tCenterX = 0.f; + float tCenterY = 0.f; + + if (unlikely (!points.resize (points.length + get_num_points ()))) return false; + + unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 2 : 1; + unsigned axes_size = numAxes * axis_width; + + const F2DOT14 *q = (const F2DOT14 *) (axes_size + + (flags & GID_IS_24 ? 3 : 2) + + &StructAfter<const HBUINT8> (numAxes)); + + hb_array_t<contour_point_t> rec_points = points.as_array ().sub_array (points.length - get_num_points ()); + + unsigned count = numAxes; + if (flags & AXES_HAVE_VARIATION) + { + for (unsigned i = 0; i < count; i++) + rec_points[i].x = *q++; + rec_points += count; + } + else + q += count; + + const HBUINT16 *p = (const HBUINT16 *) q; + + if (flags & HAVE_TRANSLATE_X) translateX = * (const FWORD *) p++; + if (flags & HAVE_TRANSLATE_Y) translateY = * (const FWORD *) p++; + if (flags & HAVE_ROTATION) rotation = * (const F2DOT14 *) p++; + if (flags & HAVE_SCALE_X) scaleX = * (const F4DOT12 *) p++; + if (flags & HAVE_SCALE_Y) scaleY = * (const F4DOT12 *) p++; + if (flags & HAVE_SKEW_X) skewX = * (const F2DOT14 *) p++; + if (flags & HAVE_SKEW_Y) skewY = * (const F2DOT14 *) p++; + if (flags & HAVE_TCENTER_X) tCenterX = * (const FWORD *) p++; + if (flags & HAVE_TCENTER_Y) tCenterY = * (const FWORD *) p++; + + if ((flags & UNIFORM_SCALE) && !(flags & HAVE_SCALE_Y)) + scaleY = scaleX; + + if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y)) + { + rec_points[0].x = translateX; + rec_points[0].y = translateY; + rec_points++; + } + if (flags & HAVE_ROTATION) + { + rec_points[0].x = rotation; + rec_points++; + } + if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y)) + { + rec_points[0].x = scaleX; + rec_points[0].y = scaleY; + rec_points++; + } + if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y)) + { + rec_points[0].x = skewX; + rec_points[0].y = skewY; + rec_points++; + } + if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y)) + { + rec_points[0].x = tCenterX; + rec_points[0].y = tCenterY; + rec_points++; + } + assert (!rec_points); + + return true; + } + + void get_transformation_from_points (hb_array_t<contour_point_t> rec_points, + float (&matrix)[4], contour_point_t &trans) const + { + if (flags & AXES_HAVE_VARIATION) + rec_points += numAxes; + + matrix[0] = matrix[3] = 1.f; + matrix[1] = matrix[2] = 0.f; + trans.init (0.f, 0.f); + + float translateX = 0.f; + float translateY = 0.f; + float rotation = 0.f; + float scaleX = 1.f; + float scaleY = 1.f; + float skewX = 0.f; + float skewY = 0.f; + float tCenterX = 0.f; + float tCenterY = 0.f; + + if (flags & (HAVE_TRANSLATE_X | HAVE_TRANSLATE_Y)) + { + translateX = rec_points[0].x; + translateY = rec_points[0].y; + rec_points++; + } + if (flags & HAVE_ROTATION) + { + rotation = rec_points[0].x / (1 << 14); + rec_points++; + } + if (flags & (HAVE_SCALE_X | HAVE_SCALE_Y)) + { + scaleX = rec_points[0].x / (1 << 12); + scaleY = rec_points[0].y / (1 << 12); + rec_points++; + } + if (flags & (HAVE_SKEW_X | HAVE_SKEW_Y)) + { + skewX = rec_points[0].x / (1 << 14); + skewY = rec_points[0].y / (1 << 14); + rec_points++; + } + if (flags & (HAVE_TCENTER_X | HAVE_TCENTER_Y)) + { + tCenterX = rec_points[0].x; + tCenterY = rec_points[0].y; + rec_points++; + } + assert (!rec_points); + + translate (matrix, trans, translateX + tCenterX, translateY + tCenterY); + rotate (matrix, trans, rotation); + scale (matrix, trans, scaleX, scaleY); + skew (matrix, trans, -skewX, skewY); + translate (matrix, trans, -tCenterX, -tCenterY); + } + + void set_variations (coord_setter_t &setter, + hb_array_t<contour_point_t> rec_points) const + { + bool have_variations = flags & AXES_HAVE_VARIATION; + unsigned axis_width = (flags & AXIS_INDICES_ARE_SHORT) ? 2 : 1; + + const HBUINT8 *p = (const HBUINT8 *) (((HBUINT8 *) &numAxes) + numAxes.static_size + (flags & GID_IS_24 ? 3 : 2)); + const HBUINT16 *q = (const HBUINT16 *) (((HBUINT8 *) &numAxes) + numAxes.static_size + (flags & GID_IS_24 ? 3 : 2)); + + const F2DOT14 *a = (const F2DOT14 *) ((HBUINT8 *) (axis_width == 1 ? (p + numAxes) : (HBUINT8 *) (q + numAxes))); + + unsigned count = numAxes; + for (unsigned i = 0; i < count; i++) + { + unsigned axis_index = axis_width == 1 ? (unsigned) *p++ : (unsigned) *q++; + + signed v = have_variations ? rec_points[i].x : *a++; + + v += setter[axis_index]; + v = hb_clamp (v, -(1<<14), (1<<14)); + setter[axis_index] = v; + } + } + + protected: + HBUINT16 flags; + HBUINT8 numAxes; + public: + DEFINE_SIZE_MIN (3); +}; + +using var_composite_iter_t = composite_iter_tmpl<VarCompositeGlyphRecord>; + +struct VarCompositeGlyph +{ + const GlyphHeader &header; + hb_bytes_t bytes; + VarCompositeGlyph (const GlyphHeader &header_, hb_bytes_t bytes_) : + header (header_), bytes (bytes_) {} + + var_composite_iter_t iter () const + { return var_composite_iter_t (bytes, &StructAfter<VarCompositeGlyphRecord, GlyphHeader> (header)); } + +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_VARCOMPOSITEGLYPH_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/composite-iter.hh b/gfx/harfbuzz/src/OT/glyf/composite-iter.hh new file mode 100644 index 0000000000..d05701f3d1 --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/composite-iter.hh @@ -0,0 +1,68 @@ +#ifndef OT_GLYF_COMPOSITE_ITER_HH +#define OT_GLYF_COMPOSITE_ITER_HH + + +#include "../../hb.hh" + + +namespace OT { +namespace glyf_impl { + + +template <typename CompositeGlyphRecord> +struct composite_iter_tmpl : hb_iter_with_fallback_t<composite_iter_tmpl<CompositeGlyphRecord>, + const CompositeGlyphRecord &> +{ + typedef const CompositeGlyphRecord *__item_t__; + composite_iter_tmpl (hb_bytes_t glyph_, __item_t__ current_) : + glyph (glyph_), current (nullptr), current_size (0) + { + set_current (current_); + } + + composite_iter_tmpl () : glyph (hb_bytes_t ()), current (nullptr), current_size (0) {} + + const CompositeGlyphRecord & __item__ () const { return *current; } + bool __more__ () const { return current; } + void __next__ () + { + if (!current->has_more ()) { current = nullptr; return; } + + set_current (&StructAtOffset<CompositeGlyphRecord> (current, current_size)); + } + composite_iter_tmpl __end__ () const { return composite_iter_tmpl (); } + bool operator != (const composite_iter_tmpl& o) const + { return current != o.current; } + + + void set_current (__item_t__ current_) + { + if (!glyph.check_range (current_, CompositeGlyphRecord::min_size)) + { + current = nullptr; + current_size = 0; + return; + } + unsigned size = current_->get_size (); + if (!glyph.check_range (current_, size)) + { + current = nullptr; + current_size = 0; + return; + } + + current = current_; + current_size = size; + } + + private: + hb_bytes_t glyph; + __item_t__ current; + unsigned current_size; +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + +#endif /* OT_GLYF_COMPOSITE_ITER_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/coord-setter.hh b/gfx/harfbuzz/src/OT/glyf/coord-setter.hh new file mode 100644 index 0000000000..df64ed5af7 --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/coord-setter.hh @@ -0,0 +1,34 @@ +#ifndef OT_GLYF_COORD_SETTER_HH +#define OT_GLYF_COORD_SETTER_HH + + +#include "../../hb.hh" + + +namespace OT { +namespace glyf_impl { + + +struct coord_setter_t +{ + coord_setter_t (hb_array_t<int> coords) : + coords (coords) {} + + int& operator [] (unsigned idx) + { + if (coords.length < idx + 1) + coords.resize (idx + 1); + return coords[idx]; + } + + hb_array_t<int> get_coords () + { return coords.as_array (); } + + hb_vector_t<int> coords; +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + +#endif /* OT_GLYF_COORD_SETTER_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/glyf-helpers.hh b/gfx/harfbuzz/src/OT/glyf/glyf-helpers.hh new file mode 100644 index 0000000000..181c33d06d --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/glyf-helpers.hh @@ -0,0 +1,90 @@ +#ifndef OT_GLYF_GLYF_HELPERS_HH +#define OT_GLYF_GLYF_HELPERS_HH + + +#include "../../hb-open-type.hh" +#include "../../hb-subset-plan.hh" + +#include "loca.hh" + + +namespace OT { +namespace glyf_impl { + + +template<typename IteratorIn, typename IteratorOut, + hb_requires (hb_is_source_of (IteratorIn, unsigned int)), + hb_requires (hb_is_sink_of (IteratorOut, unsigned))> +static void +_write_loca (IteratorIn&& it, bool short_offsets, IteratorOut&& dest) +{ + unsigned right_shift = short_offsets ? 1 : 0; + unsigned int offset = 0; + dest << 0; + + it + | hb_map ([=, &offset] (unsigned int padded_size) + { + offset += padded_size; + DEBUG_MSG (SUBSET, nullptr, "loca entry offset %d", offset); + return offset >> right_shift; + }) + | hb_sink (dest) + ; +} + +static bool +_add_head_and_set_loca_version (hb_subset_plan_t *plan, bool use_short_loca) +{ + hb_blob_t *head_blob = hb_sanitize_context_t ().reference_table<head> (plan->source); + hb_blob_t *head_prime_blob = hb_blob_copy_writable_or_fail (head_blob); + hb_blob_destroy (head_blob); + + if (unlikely (!head_prime_blob)) + return false; + + head *head_prime = (head *) hb_blob_get_data_writable (head_prime_blob, nullptr); + head_prime->indexToLocFormat = use_short_loca ? 0 : 1; + bool success = plan->add_table (HB_OT_TAG_head, head_prime_blob); + + hb_blob_destroy (head_prime_blob); + return success; +} + +template<typename Iterator, + hb_requires (hb_is_source_of (Iterator, unsigned int))> +static bool +_add_loca_and_head (hb_subset_plan_t * plan, Iterator padded_offsets, bool use_short_loca) +{ + unsigned num_offsets = padded_offsets.len () + 1; + unsigned entry_size = use_short_loca ? 2 : 4; + char *loca_prime_data = (char *) hb_calloc (entry_size, num_offsets); + + if (unlikely (!loca_prime_data)) return false; + + DEBUG_MSG (SUBSET, nullptr, "loca entry_size %d num_offsets %d size %d", + entry_size, num_offsets, entry_size * num_offsets); + + if (use_short_loca) + _write_loca (padded_offsets, true, hb_array ((HBUINT16 *) loca_prime_data, num_offsets)); + else + _write_loca (padded_offsets, false, hb_array ((HBUINT32 *) loca_prime_data, num_offsets)); + + hb_blob_t *loca_blob = hb_blob_create (loca_prime_data, + entry_size * num_offsets, + HB_MEMORY_MODE_WRITABLE, + loca_prime_data, + hb_free); + + bool result = plan->add_table (HB_OT_TAG_loca, loca_blob) + && _add_head_and_set_loca_version (plan, use_short_loca); + + hb_blob_destroy (loca_blob); + return result; +} + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_GLYF_HELPERS_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/glyf.hh b/gfx/harfbuzz/src/OT/glyf/glyf.hh new file mode 100644 index 0000000000..e6e985c38c --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/glyf.hh @@ -0,0 +1,448 @@ +#ifndef OT_GLYF_GLYF_HH +#define OT_GLYF_GLYF_HH + + +#include "../../hb-open-type.hh" +#include "../../hb-ot-head-table.hh" +#include "../../hb-ot-hmtx-table.hh" +#include "../../hb-ot-var-gvar-table.hh" +#include "../../hb-draw.hh" + +#include "glyf-helpers.hh" +#include "Glyph.hh" +#include "SubsetGlyph.hh" +#include "loca.hh" +#include "path-builder.hh" + + +namespace OT { + + +/* + * glyf -- TrueType Glyph Data + * https://docs.microsoft.com/en-us/typography/opentype/spec/glyf + */ +#define HB_OT_TAG_glyf HB_TAG('g','l','y','f') + +struct glyf +{ + friend struct glyf_accelerator_t; + + static constexpr hb_tag_t tableTag = HB_OT_TAG_glyf; + + bool sanitize (hb_sanitize_context_t *c HB_UNUSED) const + { + TRACE_SANITIZE (this); + /* Runtime checks as eager sanitizing each glyph is costy */ + return_trace (true); + } + + /* requires source of SubsetGlyph complains the identifier isn't declared */ + template <typename Iterator> + bool serialize (hb_serialize_context_t *c, + Iterator it, + bool use_short_loca, + const hb_subset_plan_t *plan, + hb_font_t *font) + { + TRACE_SERIALIZE (this); + + unsigned init_len = c->length (); + for (auto &_ : it) + if (unlikely (!_.serialize (c, use_short_loca, plan, font))) + return false; + + /* As a special case when all glyph in the font are empty, add a zero byte + * to the table, so that OTS doesn’t reject it, and to make the table work + * on Windows as well. + * See https://github.com/khaledhosny/ots/issues/52 */ + if (init_len == c->length ()) + { + HBUINT8 empty_byte; + empty_byte = 0; + c->copy (empty_byte); + } + return_trace (true); + } + + /* Byte region(s) per glyph to output + unpadded, hints removed if so requested + If we fail to process a glyph we produce an empty (0-length) glyph */ + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + + glyf *glyf_prime = c->serializer->start_embed <glyf> (); + if (unlikely (!c->serializer->check_success (glyf_prime))) return_trace (false); + + hb_vector_t<glyf_impl::SubsetGlyph> glyphs; + _populate_subset_glyphs (c->plan, glyphs); + + hb_font_t *font = nullptr; + if (!c->plan->pinned_at_default) + { + font = _create_font_for_instancing (c->plan); + if (unlikely (!font)) return false; + } + + auto padded_offsets = + + hb_iter (glyphs) + | hb_map (&glyf_impl::SubsetGlyph::padded_size) + ; + + bool use_short_loca = false; + if (likely (!c->plan->force_long_loca)) + { + unsigned max_offset = + padded_offsets | hb_reduce (hb_add, 0); + use_short_loca = max_offset < 0x1FFFF; + } + + glyf_prime->serialize (c->serializer, glyphs.writer (), use_short_loca, c->plan, font); + if (!use_short_loca) { + padded_offsets = + + hb_iter (glyphs) + | hb_map (&glyf_impl::SubsetGlyph::length) + ; + } + + if (font) + { + _free_compiled_subset_glyphs (&glyphs); + hb_font_destroy (font); + } + + if (unlikely (c->serializer->in_error ())) return_trace (false); + return_trace (c->serializer->check_success (glyf_impl::_add_loca_and_head (c->plan, + padded_offsets, + use_short_loca))); + } + + void + _populate_subset_glyphs (const hb_subset_plan_t *plan, + hb_vector_t<glyf_impl::SubsetGlyph> &glyphs /* OUT */) const; + + hb_font_t * + _create_font_for_instancing (const hb_subset_plan_t *plan) const; + + void _free_compiled_subset_glyphs (hb_vector_t<glyf_impl::SubsetGlyph> *glyphs) const + { + for (auto _ : *glyphs) + _.free_compiled_bytes (); + } + + protected: + UnsizedArrayOf<HBUINT8> + dataZ; /* Glyphs data. */ + public: + DEFINE_SIZE_MIN (0); /* In reality, this is UNBOUNDED() type; but since we always + * check the size externally, allow Null() object of it by + * defining it _MIN instead. */ +}; + +struct glyf_accelerator_t +{ + glyf_accelerator_t (hb_face_t *face) + { + short_offset = false; + num_glyphs = 0; + loca_table = nullptr; + glyf_table = nullptr; +#ifndef HB_NO_VAR + gvar = nullptr; +#endif + hmtx = nullptr; +#ifndef HB_NO_VERTICAL + vmtx = nullptr; +#endif + const OT::head &head = *face->table.head; + if (head.indexToLocFormat > 1 || head.glyphDataFormat > 0) + /* Unknown format. Leave num_glyphs=0, that takes care of disabling us. */ + return; + short_offset = 0 == head.indexToLocFormat; + + loca_table = face->table.loca.get_blob (); // Needs no destruct! + glyf_table = hb_sanitize_context_t ().reference_table<glyf> (face); +#ifndef HB_NO_VAR + gvar = face->table.gvar; +#endif + hmtx = face->table.hmtx; +#ifndef HB_NO_VERTICAL + vmtx = face->table.vmtx; +#endif + + num_glyphs = hb_max (1u, loca_table.get_length () / (short_offset ? 2 : 4)) - 1; + num_glyphs = hb_min (num_glyphs, face->get_num_glyphs ()); + } + ~glyf_accelerator_t () + { + glyf_table.destroy (); + } + + bool has_data () const { return num_glyphs; } + + protected: + template<typename T> + bool get_points (hb_font_t *font, hb_codepoint_t gid, T consumer) const + { + if (gid >= num_glyphs) return false; + + /* Making this allocfree is not that easy + https://github.com/harfbuzz/harfbuzz/issues/2095 + mostly because of gvar handling in VF fonts, + perhaps a separate path for non-VF fonts can be considered */ + contour_point_vector_t all_points; + + bool phantom_only = !consumer.is_consuming_contour_points (); + if (unlikely (!glyph_for_gid (gid).get_points (font, *this, all_points, nullptr, true, true, phantom_only))) + return false; + + if (consumer.is_consuming_contour_points ()) + { + unsigned count = all_points.length; + assert (count >= glyf_impl::PHANTOM_COUNT); + count -= glyf_impl::PHANTOM_COUNT; + for (unsigned point_index = 0; point_index < count; point_index++) + consumer.consume_point (all_points[point_index]); + consumer.points_end (); + } + + /* Where to write phantoms, nullptr if not requested */ + contour_point_t *phantoms = consumer.get_phantoms_sink (); + if (phantoms) + for (unsigned i = 0; i < glyf_impl::PHANTOM_COUNT; ++i) + phantoms[i] = all_points[all_points.length - glyf_impl::PHANTOM_COUNT + i]; + + return true; + } + +#ifndef HB_NO_VAR + struct points_aggregator_t + { + hb_font_t *font; + hb_glyph_extents_t *extents; + contour_point_t *phantoms; + bool scaled; + + struct contour_bounds_t + { + contour_bounds_t () { min_x = min_y = FLT_MAX; max_x = max_y = -FLT_MAX; } + + void add (const contour_point_t &p) + { + min_x = hb_min (min_x, p.x); + min_y = hb_min (min_y, p.y); + max_x = hb_max (max_x, p.x); + max_y = hb_max (max_y, p.y); + } + + bool empty () const { return (min_x >= max_x) || (min_y >= max_y); } + + void get_extents (hb_font_t *font, hb_glyph_extents_t *extents, bool scaled) + { + if (unlikely (empty ())) + { + extents->width = 0; + extents->x_bearing = 0; + extents->height = 0; + extents->y_bearing = 0; + return; + } + if (scaled) + { + extents->x_bearing = font->em_scalef_x (min_x); + extents->width = font->em_scalef_x (max_x) - extents->x_bearing; + extents->y_bearing = font->em_scalef_y (max_y); + extents->height = font->em_scalef_y (min_y) - extents->y_bearing; + } + else + { + extents->x_bearing = roundf (min_x); + extents->width = roundf (max_x - extents->x_bearing); + extents->y_bearing = roundf (max_y); + extents->height = roundf (min_y - extents->y_bearing); + } + } + + protected: + float min_x, min_y, max_x, max_y; + } bounds; + + points_aggregator_t (hb_font_t *font_, hb_glyph_extents_t *extents_, contour_point_t *phantoms_, bool scaled_) + { + font = font_; + extents = extents_; + phantoms = phantoms_; + scaled = scaled_; + if (extents) bounds = contour_bounds_t (); + } + + void consume_point (const contour_point_t &point) { bounds.add (point); } + void points_end () { bounds.get_extents (font, extents, scaled); } + + bool is_consuming_contour_points () { return extents; } + contour_point_t *get_phantoms_sink () { return phantoms; } + }; + + public: + unsigned + get_advance_with_var_unscaled (hb_font_t *font, hb_codepoint_t gid, bool is_vertical) const + { + if (unlikely (gid >= num_glyphs)) return 0; + + bool success = false; + + contour_point_t phantoms[glyf_impl::PHANTOM_COUNT]; + if (font->num_coords) + success = get_points (font, gid, points_aggregator_t (font, nullptr, phantoms, false)); + + if (unlikely (!success)) + return +#ifndef HB_NO_VERTICAL + is_vertical ? vmtx->get_advance_without_var_unscaled (gid) : +#endif + hmtx->get_advance_without_var_unscaled (gid); + + float result = is_vertical + ? phantoms[glyf_impl::PHANTOM_TOP].y - phantoms[glyf_impl::PHANTOM_BOTTOM].y + : phantoms[glyf_impl::PHANTOM_RIGHT].x - phantoms[glyf_impl::PHANTOM_LEFT].x; + return hb_clamp (roundf (result), 0.f, (float) UINT_MAX / 2); + } + + bool get_leading_bearing_with_var_unscaled (hb_font_t *font, hb_codepoint_t gid, bool is_vertical, int *lsb) const + { + if (unlikely (gid >= num_glyphs)) return false; + + hb_glyph_extents_t extents; + + contour_point_t phantoms[glyf_impl::PHANTOM_COUNT]; + if (unlikely (!get_points (font, gid, points_aggregator_t (font, &extents, phantoms, false)))) + return false; + + *lsb = is_vertical + ? roundf (phantoms[glyf_impl::PHANTOM_TOP].y) - extents.y_bearing + : roundf (phantoms[glyf_impl::PHANTOM_LEFT].x); + return true; + } +#endif + + public: + bool get_extents (hb_font_t *font, hb_codepoint_t gid, hb_glyph_extents_t *extents) const + { + if (unlikely (gid >= num_glyphs)) return false; + +#ifndef HB_NO_VAR + if (font->num_coords) + return get_points (font, gid, points_aggregator_t (font, extents, nullptr, true)); +#endif + return glyph_for_gid (gid).get_extents_without_var_scaled (font, *this, extents); + } + + const glyf_impl::Glyph + glyph_for_gid (hb_codepoint_t gid, bool needs_padding_removal = false) const + { + if (unlikely (gid >= num_glyphs)) return glyf_impl::Glyph (); + + unsigned int start_offset, end_offset; + + if (short_offset) + { + const HBUINT16 *offsets = (const HBUINT16 *) loca_table->dataZ.arrayZ; + start_offset = 2 * offsets[gid]; + end_offset = 2 * offsets[gid + 1]; + } + else + { + const HBUINT32 *offsets = (const HBUINT32 *) loca_table->dataZ.arrayZ; + start_offset = offsets[gid]; + end_offset = offsets[gid + 1]; + } + + if (unlikely (start_offset > end_offset || end_offset > glyf_table.get_length ())) + return glyf_impl::Glyph (); + + glyf_impl::Glyph glyph (hb_bytes_t ((const char *) this->glyf_table + start_offset, + end_offset - start_offset), gid); + return needs_padding_removal ? glyf_impl::Glyph (glyph.trim_padding (), gid) : glyph; + } + + bool + get_path (hb_font_t *font, hb_codepoint_t gid, hb_draw_session_t &draw_session) const + { return get_points (font, gid, glyf_impl::path_builder_t (font, draw_session)); } + +#ifndef HB_NO_VAR + const gvar_accelerator_t *gvar; +#endif + const hmtx_accelerator_t *hmtx; +#ifndef HB_NO_VERTICAL + const vmtx_accelerator_t *vmtx; +#endif + + private: + bool short_offset; + unsigned int num_glyphs; + hb_blob_ptr_t<loca> loca_table; + hb_blob_ptr_t<glyf> glyf_table; +}; + + +inline void +glyf::_populate_subset_glyphs (const hb_subset_plan_t *plan, + hb_vector_t<glyf_impl::SubsetGlyph>& glyphs /* OUT */) const +{ + OT::glyf_accelerator_t glyf (plan->source); + unsigned num_glyphs = plan->num_output_glyphs (); + if (!glyphs.resize (num_glyphs)) return; + + for (auto p : plan->glyph_map->iter ()) + { + unsigned new_gid = p.second; + glyf_impl::SubsetGlyph& subset_glyph = glyphs.arrayZ[new_gid]; + subset_glyph.old_gid = p.first; + + if (unlikely (new_gid == 0 && + !(plan->flags & HB_SUBSET_FLAGS_NOTDEF_OUTLINE)) && + plan->pinned_at_default) + subset_glyph.source_glyph = glyf_impl::Glyph (); + else + { + /* If plan has an accelerator, the preprocessing step already trimmed glyphs. + * Don't trim them again! */ + subset_glyph.source_glyph = glyf.glyph_for_gid (subset_glyph.old_gid, !plan->accelerator); + } + + if (plan->flags & HB_SUBSET_FLAGS_NO_HINTING) + subset_glyph.drop_hints_bytes (); + else + subset_glyph.dest_start = subset_glyph.source_glyph.get_bytes (); + } +} + +inline hb_font_t * +glyf::_create_font_for_instancing (const hb_subset_plan_t *plan) const +{ + hb_font_t *font = hb_font_create (plan->source); + if (unlikely (font == hb_font_get_empty ())) return nullptr; + + hb_vector_t<hb_variation_t> vars; + if (unlikely (!vars.alloc (plan->user_axes_location->get_population ()))) + return nullptr; + + for (auto _ : *plan->user_axes_location) + { + hb_variation_t var; + var.tag = _.first; + var.value = _.second; + vars.push (var); + } + +#ifndef HB_NO_VAR + hb_font_set_variations (font, vars.arrayZ, plan->user_axes_location->get_population ()); +#endif + return font; +} + + +} /* namespace OT */ + + +#endif /* OT_GLYF_GLYF_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/loca.hh b/gfx/harfbuzz/src/OT/glyf/loca.hh new file mode 100644 index 0000000000..4481cba8ed --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/loca.hh @@ -0,0 +1,43 @@ +#ifndef OT_GLYF_LOCA_HH +#define OT_GLYF_LOCA_HH + + +#include "../../hb-open-type.hh" + + +namespace OT { + + +/* + * loca -- Index to Location + * https://docs.microsoft.com/en-us/typography/opentype/spec/loca + */ +#define HB_OT_TAG_loca HB_TAG('l','o','c','a') + +struct loca +{ + friend struct glyf; + friend struct glyf_accelerator_t; + + static constexpr hb_tag_t tableTag = HB_OT_TAG_loca; + + bool sanitize (hb_sanitize_context_t *c HB_UNUSED) const + { + TRACE_SANITIZE (this); + return_trace (true); + } + + protected: + UnsizedArrayOf<HBUINT8> + dataZ; /* Location data. */ + public: + DEFINE_SIZE_MIN (0); /* In reality, this is UNBOUNDED() type; but since we always + * check the size externally, allow Null() object of it by + * defining it _MIN instead. */ +}; + + +} /* namespace OT */ + + +#endif /* OT_GLYF_LOCA_HH */ diff --git a/gfx/harfbuzz/src/OT/glyf/path-builder.hh b/gfx/harfbuzz/src/OT/glyf/path-builder.hh new file mode 100644 index 0000000000..9bfc45a1a6 --- /dev/null +++ b/gfx/harfbuzz/src/OT/glyf/path-builder.hh @@ -0,0 +1,135 @@ +#ifndef OT_GLYF_PATH_BUILDER_HH +#define OT_GLYF_PATH_BUILDER_HH + + +#include "../../hb.hh" + + +namespace OT { +namespace glyf_impl { + + +struct path_builder_t +{ + hb_font_t *font; + hb_draw_session_t *draw_session; + + struct optional_point_t + { + optional_point_t () {} + optional_point_t (float x_, float y_) : has_data (true), x (x_), y (y_) {} + operator bool () const { return has_data; } + + bool has_data = false; + float x = 0.; + float y = 0.; + + optional_point_t lerp (optional_point_t p, float t) + { return optional_point_t (x + t * (p.x - x), y + t * (p.y - y)); } + } first_oncurve, first_offcurve, last_offcurve; + + path_builder_t (hb_font_t *font_, hb_draw_session_t &draw_session_) + { + font = font_; + draw_session = &draw_session_; + first_oncurve = first_offcurve = last_offcurve = optional_point_t (); + } + + /* based on https://github.com/RazrFalcon/ttf-parser/blob/4f32821/src/glyf.rs#L287 + See also: + * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM01/Chap1.html + * https://stackoverflow.com/a/20772557 */ + void consume_point (const contour_point_t &point) + { + bool is_on_curve = point.flag & glyf_impl::SimpleGlyph::FLAG_ON_CURVE; + optional_point_t p (font->em_fscalef_x (point.x), font->em_fscalef_y (point.y)); + if (!first_oncurve) + { + if (is_on_curve) + { + first_oncurve = p; + draw_session->move_to (p.x, p.y); + } + else + { + if (first_offcurve) + { + optional_point_t mid = first_offcurve.lerp (p, .5f); + first_oncurve = mid; + last_offcurve = p; + draw_session->move_to (mid.x, mid.y); + } + else + first_offcurve = p; + } + } + else + { + if (last_offcurve) + { + if (is_on_curve) + { + draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, + p.x, p.y); + last_offcurve = optional_point_t (); + } + else + { + optional_point_t mid = last_offcurve.lerp (p, .5f); + draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, + mid.x, mid.y); + last_offcurve = p; + } + } + else + { + if (is_on_curve) + draw_session->line_to (p.x, p.y); + else + last_offcurve = p; + } + } + + if (point.is_end_point) + { + if (first_offcurve && last_offcurve) + { + optional_point_t mid = last_offcurve.lerp (first_offcurve, .5f); + draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, + mid.x, mid.y); + last_offcurve = optional_point_t (); + /* now check the rest */ + } + + if (first_offcurve && first_oncurve) + draw_session->quadratic_to (first_offcurve.x, first_offcurve.y, + first_oncurve.x, first_oncurve.y); + else if (last_offcurve && first_oncurve) + draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, + first_oncurve.x, first_oncurve.y); + else if (first_oncurve) + draw_session->line_to (first_oncurve.x, first_oncurve.y); + else if (first_offcurve) + { + float x = first_offcurve.x, y = first_offcurve.y; + draw_session->move_to (x, y); + draw_session->quadratic_to (x, y, x, y); + } + + /* Getting ready for the next contour */ + first_oncurve = first_offcurve = last_offcurve = optional_point_t (); + draw_session->close_path (); + } + } + void points_end () {} + + bool is_consuming_contour_points () { return true; } + contour_point_t *get_phantoms_sink () { return nullptr; } +}; + + +} /* namespace glyf_impl */ +} /* namespace OT */ + + +#endif /* OT_GLYF_PATH_BUILDER_HH */ |