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-rw-r--r--src/3rdparty/harfbuzz-ng/src/hb-ot-glyf-table.hh1081
1 files changed, 1 insertions, 1080 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-glyf-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-glyf-table.hh
index 571e50ea0c..c32ff7636d 100644
--- a/src/3rdparty/harfbuzz-ng/src/hb-ot-glyf-table.hh
+++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-glyf-table.hh
@@ -30,1085 +30,6 @@
#ifndef HB_OT_GLYF_TABLE_HH
#define HB_OT_GLYF_TABLE_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 <float.h>
-
-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;
-
- 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. */
-};
-
-
-/*
- * 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
-{
- 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);
- }
-
- 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)
- {
- unsigned max_offset = + padded_offsets | hb_reduce(hb_add, 0);
- unsigned num_offsets = padded_offsets.len () + 1;
- bool use_short_loca = max_offset < 0x1FFFF;
- unsigned entry_size = use_short_loca ? 2 : 4;
- char *loca_prime_data = (char *) calloc (entry_size, num_offsets);
-
- if (unlikely (!loca_prime_data)) return false;
-
- DEBUG_MSG (SUBSET, nullptr, "loca entry_size %d num_offsets %d "
- "max_offset %d size %d",
- entry_size, num_offsets, max_offset, entry_size * num_offsets);
-
- if (use_short_loca)
- _write_loca (padded_offsets, 1, hb_array ((HBUINT16*) loca_prime_data, num_offsets));
- else
- _write_loca (padded_offsets, 0, 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,
- 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;
- }
-
- 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, unsigned right_shift, IteratorOut dest)
- {
- 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)
- ;
- }
-
- /* requires source of SubsetGlyph complains the identifier isn't declared */
- template <typename Iterator>
- bool serialize (hb_serialize_context_t *c,
- Iterator it,
- const hb_subset_plan_t *plan)
- {
- TRACE_SERIALIZE (this);
- for (const auto &_ : it) _.serialize (c, plan);
- 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<SubsetGlyph> glyphs;
- _populate_subset_glyphs (c->plan, &glyphs);
-
- glyf_prime->serialize (c->serializer, hb_iter (glyphs), c->plan);
-
- auto padded_offsets =
- + hb_iter (glyphs)
- | hb_map (&SubsetGlyph::padded_size)
- ;
-
- if (c->serializer->in_error ()) return_trace (false);
- return_trace (c->serializer->check_success (_add_loca_and_head (c->plan,
- padded_offsets)));
- }
-
- template <typename SubsetGlyph>
- void
- _populate_subset_glyphs (const hb_subset_plan_t *plan,
- hb_vector_t<SubsetGlyph> *glyphs /* OUT */) const
- {
- OT::glyf::accelerator_t glyf;
- glyf.init (plan->source);
-
- + hb_range (plan->num_output_glyphs ())
- | hb_map ([&] (hb_codepoint_t new_gid)
- {
- SubsetGlyph subset_glyph = {0};
- subset_glyph.new_gid = new_gid;
-
- /* should never fail: all old gids should be mapped */
- if (!plan->old_gid_for_new_gid (new_gid, &subset_glyph.old_gid))
- return subset_glyph;
-
- subset_glyph.source_glyph = glyf.glyph_for_gid (subset_glyph.old_gid, true);
- if (plan->drop_hints) subset_glyph.drop_hints_bytes ();
- else subset_glyph.dest_start = subset_glyph.source_glyph.get_bytes ();
-
- return subset_glyph;
- })
- | hb_sink (glyphs)
- ;
-
- glyf.fini ();
- }
-
- 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;
- }
-
- struct CompositeGlyphChain
- {
- 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
- };
-
- unsigned int get_size () const
- {
- unsigned int size = min_size;
- /* 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;
- }
-
- 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 HBUINT8 *p = &StructAfter<const HBUINT8> (glyphIndex);
- 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);
- }
- }
- }
-
- 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;
-
- int tx, ty;
- const HBINT8 *p = &StructAfter<const HBINT8> (glyphIndex);
- 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:
- HBUINT16 flags;
- HBGlyphID glyphIndex;
- public:
- DEFINE_SIZE_MIN (4);
- };
-
- struct composite_iter_t : hb_iter_with_fallback_t<composite_iter_t, const CompositeGlyphChain &>
- {
- typedef const CompositeGlyphChain *__item_t__;
- composite_iter_t (hb_bytes_t glyph_, __item_t__ current_) :
- glyph (glyph_), current (current_)
- { if (!in_range (current)) current = nullptr; }
- composite_iter_t () : glyph (hb_bytes_t ()), current (nullptr) {}
-
- const CompositeGlyphChain &__item__ () const { return *current; }
- bool __more__ () const { return current; }
- void __next__ ()
- {
- if (!(current->flags & CompositeGlyphChain::MORE_COMPONENTS)) { current = nullptr; return; }
-
- const CompositeGlyphChain *possible = &StructAfter<CompositeGlyphChain,
- CompositeGlyphChain> (*current);
- if (!in_range (possible)) { current = nullptr; return; }
- current = possible;
- }
- bool operator != (const composite_iter_t& o) const
- { return glyph != o.glyph || current != o.current; }
-
- bool in_range (const CompositeGlyphChain *composite) const
- {
- return glyph.in_range (composite, CompositeGlyphChain::min_size)
- && glyph.in_range (composite, composite->get_size ());
- }
-
- private:
- hb_bytes_t glyph;
- __item_t__ current;
- };
-
- struct Glyph
- {
- private:
- struct GlyphHeader
- {
- bool has_data () const { return numberOfContours; }
-
- bool get_extents (hb_font_t *font, 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); */
- extents->x_bearing = font->em_scale_x (font->face->table.hmtx->get_side_bearing (gid));
- 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);
- };
-
- struct SimpleGlyph
- {
- 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;
- }
-
- 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_RESERVED1 = 0x40,
- FLAG_RESERVED2 = 0x80
- };
-
- const Glyph trim_padding () const
- {
- /* based on FontTools _g_l_y_f.py::trim */
- const char *glyph = bytes.arrayZ;
- const char *glyph_end = glyph + bytes.length;
- /* simple glyph w/contours, possibly trimmable */
- glyph += instruction_len_offset ();
-
- if (unlikely (glyph + 2 >= glyph_end)) return Glyph ();
- unsigned int num_coordinates = StructAtOffset<HBUINT16> (glyph - 2, 0) + 1;
- unsigned int num_instructions = StructAtOffset<HBUINT16> (glyph, 0);
-
- glyph += 2 + num_instructions;
- if (unlikely (glyph + 2 >= glyph_end)) return Glyph ();
-
- 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 Glyph ();
- 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 Glyph ();
- return Glyph (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);
- }
-
- struct x_setter_t
- {
- void set (contour_point_t &point, float v) const { point.x = v; }
- bool is_short (uint8_t flag) const { return flag & FLAG_X_SHORT; }
- bool is_same (uint8_t flag) const { return flag & FLAG_X_SAME; }
- };
-
- struct y_setter_t
- {
- void set (contour_point_t &point, float v) const { point.y = v; }
- bool is_short (uint8_t flag) const { return flag & FLAG_Y_SHORT; }
- bool is_same (uint8_t flag) const { return flag & FLAG_Y_SAME; }
- };
-
- template <typename T>
- static bool read_points (const HBUINT8 *&p /* IN/OUT */,
- contour_point_vector_t &points_ /* IN/OUT */,
- const hb_bytes_t &bytes)
- {
- T coord_setter;
- float v = 0;
- for (unsigned int i = 0; i < points_.length - PHANTOM_COUNT; i++)
- {
- uint8_t flag = points_[i].flag;
- if (coord_setter.is_short (flag))
- {
- if (unlikely (!bytes.in_range (p))) return false;
- if (coord_setter.is_same (flag))
- v += *p++;
- else
- v -= *p++;
- }
- else
- {
- if (!coord_setter.is_same (flag))
- {
- if (unlikely (!bytes.in_range ((const HBUINT16 *) p))) return false;
- v += *(const HBINT16 *) p;
- p += HBINT16::static_size;
- }
- }
- coord_setter.set (points_[i], v);
- }
- return true;
- }
-
- bool get_contour_points (contour_point_vector_t &points_ /* OUT */,
- hb_vector_t<unsigned int> &end_points_ /* OUT */,
- const bool phantom_only=false) const
- {
- const HBUINT16 *endPtsOfContours = &StructAfter<HBUINT16> (header);
- int num_contours = header.numberOfContours;
- if (unlikely (!bytes.in_range (&endPtsOfContours[num_contours + 1]))) return false;
- unsigned int num_points = endPtsOfContours[num_contours - 1] + 1;
-
- points_.resize (num_points + PHANTOM_COUNT);
- for (unsigned int i = 0; i < points_.length; i++) points_[i].init ();
- if (phantom_only) return true;
-
- /* Read simple glyph points if !phantom_only */
- end_points_.resize (num_contours);
-
- for (int i = 0; i < num_contours; i++)
- end_points_[i] = endPtsOfContours[i];
-
- /* Skip instructions */
- const HBUINT8 *p = &StructAtOffset<HBUINT8> (&endPtsOfContours[num_contours + 1],
- endPtsOfContours[num_contours]);
-
- /* Read flags */
- for (unsigned int i = 0; i < num_points; i++)
- {
- if (unlikely (!bytes.in_range (p))) return false;
- uint8_t flag = *p++;
- points_[i].flag = flag;
- if (flag & FLAG_REPEAT)
- {
- if (unlikely (!bytes.in_range (p))) return false;
- unsigned int repeat_count = *p++;
- while ((repeat_count-- > 0) && (++i < num_points))
- points_[i].flag = flag;
- }
- }
-
- /* Read x & y coordinates */
- return (read_points<x_setter_t> (p, points_, bytes) &&
- read_points<y_setter_t> (p, points_, bytes));
- }
- };
-
- struct CompositeGlyph
- {
- const GlyphHeader &header;
- hb_bytes_t bytes;
- CompositeGlyph (const GlyphHeader &header_, hb_bytes_t bytes_) :
- header (header_), bytes (bytes_) {}
-
- composite_iter_t get_iterator () const
- { return composite_iter_t (bytes, &StructAfter<CompositeGlyphChain, GlyphHeader> (header)); }
-
- unsigned int instructions_length (hb_bytes_t bytes) const
- {
- unsigned int start = bytes.length;
- unsigned int end = bytes.length;
- const CompositeGlyphChain *last = nullptr;
- for (auto &item : get_iterator ())
- last = &item;
- if (unlikely (!last)) return 0;
-
- if ((uint16_t) last->flags & CompositeGlyphChain::WE_HAVE_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 Glyph trim_padding () const { return Glyph (bytes); }
-
- /* remove WE_HAVE_INSTRUCTIONS flag from composite glyph */
- void drop_hints ()
- {
- for (const auto &_ : get_iterator ())
- *const_cast<OT::HBUINT16 *> (&_.flags) = (uint16_t) _.flags & ~OT::glyf::CompositeGlyphChain::WE_HAVE_INSTRUCTIONS;
- }
-
- /* 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)); }
-
- bool get_contour_points (contour_point_vector_t &points_ /* OUT */,
- hb_vector_t<unsigned int> &end_points_ /* OUT */,
- const bool phantom_only=false) const
- {
- /* add one pseudo point for each component in composite glyph */
- unsigned int num_points = hb_len (get_iterator ());
- points_.resize (num_points + PHANTOM_COUNT);
- for (unsigned int i = 0; i < points_.length; i++) points_[i].init ();
- return true;
- }
- };
-
- enum glyph_type_t { EMPTY, SIMPLE, COMPOSITE };
-
- enum phantom_point_index_t
- {
- PHANTOM_LEFT = 0,
- PHANTOM_RIGHT = 1,
- PHANTOM_TOP = 2,
- PHANTOM_BOTTOM = 3,
- PHANTOM_COUNT = 4
- };
-
- public:
- composite_iter_t get_composite_iterator () const
- {
- if (type != COMPOSITE) return composite_iter_t ();
- return CompositeGlyph (*header, bytes).get_iterator ();
- }
-
- const Glyph 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 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;
- }
- }
-
- /* for a simple glyph, return contour end points, flags, along with coordinate points
- * for a composite glyph, return pseudo component points
- * in both cases points trailed with four phantom points
- */
- bool get_contour_points (contour_point_vector_t &points_ /* OUT */,
- hb_vector_t<unsigned int> &end_points_ /* OUT */,
- const bool phantom_only=false) const
- {
- switch (type) {
- case COMPOSITE: return CompositeGlyph (*header, bytes).get_contour_points (points_, end_points_, phantom_only);
- case SIMPLE: return SimpleGlyph (*header, bytes).get_contour_points (points_, end_points_, phantom_only);
- default:
- /* empty glyph */
- points_.resize (PHANTOM_COUNT);
- for (unsigned int i = 0; i < points_.length; i++) points_[i].init ();
- return true;
- }
- }
-
- bool is_simple_glyph () const { return type == SIMPLE; }
- bool is_composite_glyph () const { return type == COMPOSITE; }
-
- bool get_extents (hb_font_t *font, hb_codepoint_t gid, hb_glyph_extents_t *extents) const
- {
- if (type == EMPTY) return true; /* Empty glyph; zero extents. */
- return header->get_extents (font, gid, extents);
- }
-
- hb_bytes_t get_bytes () const { return bytes; }
- const GlyphHeader &get_header () const { return *header; }
-
- Glyph (hb_bytes_t bytes_ = hb_bytes_t ()) :
- bytes (bytes_), header (bytes.as<GlyphHeader> ())
- {
- int num_contours = header->numberOfContours;
- if (unlikely (num_contours == 0)) type = EMPTY;
- else if (num_contours > 0) type = SIMPLE;
- else type = COMPOSITE; /* negative numbers */
- }
-
- protected:
- hb_bytes_t bytes;
- const GlyphHeader *header;
- unsigned type;
- };
-
- struct accelerator_t
- {
- void init (hb_face_t *face_)
- {
- short_offset = false;
- num_glyphs = 0;
- loca_table = nullptr;
- glyf_table = nullptr;
- face = face_;
- 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 = hb_sanitize_context_t ().reference_table<loca> (face);
- glyf_table = hb_sanitize_context_t ().reference_table<glyf> (face);
-
- num_glyphs = hb_max (1u, loca_table.get_length () / (short_offset ? 2 : 4)) - 1;
- }
-
- void fini ()
- {
- loca_table.destroy ();
- glyf_table.destroy ();
- }
-
- enum phantom_point_index_t
- {
- PHANTOM_LEFT = 0,
- PHANTOM_RIGHT = 1,
- PHANTOM_TOP = 2,
- PHANTOM_BOTTOM = 3,
- PHANTOM_COUNT = 4
- };
-
- protected:
-
- void init_phantom_points (hb_codepoint_t gid, hb_array_t<contour_point_t> &phantoms /* IN/OUT */) const
- {
- const Glyph &glyph = glyph_for_gid (gid);
- int h_delta = (int) glyph.get_header ().xMin - face->table.hmtx->get_side_bearing (gid);
- int v_orig = (int) glyph.get_header ().yMax + face->table.vmtx->get_side_bearing (gid);
- unsigned int h_adv = face->table.hmtx->get_advance (gid);
- unsigned int v_adv = face->table.vmtx->get_advance (gid);
-
- 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;
- }
-
- 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)
- {
- if (unlikely (empty ()))
- {
- extents->width = 0;
- extents->x_bearing = 0;
- extents->height = 0;
- extents->y_bearing = 0;
- return;
- }
- extents->x_bearing = font->em_scalef_x (min_x);
- extents->width = font->em_scalef_x (max_x - min_x);
- extents->y_bearing = font->em_scalef_y (max_y);
- extents->height = font->em_scalef_y (min_y - max_y);
- }
-
- protected:
- float min_x, min_y, max_x, max_y;
- };
-
-#ifndef HB_NO_VAR
- /* Note: Recursively calls itself.
- * all_points includes phantom points
- */
- bool get_points_var (hb_codepoint_t gid,
- const int *coords, unsigned int coord_count,
- contour_point_vector_t &all_points /* OUT */,
- unsigned int depth = 0) const
- {
- if (unlikely (depth++ > HB_MAX_NESTING_LEVEL)) return false;
- contour_point_vector_t points;
- hb_vector_t<unsigned int> end_points;
- const Glyph &glyph = glyph_for_gid (gid);
- if (unlikely (!glyph.get_contour_points (points, end_points))) return false;
- hb_array_t<contour_point_t> phantoms = points.sub_array (points.length - PHANTOM_COUNT, PHANTOM_COUNT);
- init_phantom_points (gid, phantoms);
- if (unlikely (!face->table.gvar->apply_deltas_to_points (gid, coords, coord_count, points.as_array (), end_points.as_array ()))) return false;
-
- unsigned int comp_index = 0;
- if (glyph.is_simple_glyph ())
- all_points.extend (points.as_array ());
- else if (glyph.is_composite_glyph ())
- {
- for (auto &item : glyph.get_composite_iterator ())
- {
- contour_point_vector_t comp_points;
- if (unlikely (!get_points_var (item.glyphIndex, coords, coord_count,
- comp_points, depth))
- || comp_points.length < PHANTOM_COUNT)
- return false;
-
- /* Copy phantom points from component if USE_MY_METRICS flag set */
- if (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 translatation 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.sub_array (0, comp_points.length - PHANTOM_COUNT));
-
- comp_index++;
- }
-
- all_points.extend (phantoms);
- }
- else return false;
-
- return true;
- }
-
- bool get_points_bearing_applied (hb_font_t *font, hb_codepoint_t gid, contour_point_vector_t &all_points) const
- {
- if (unlikely (!get_points_var (gid, font->coords, font->num_coords, all_points) ||
- all_points.length < PHANTOM_COUNT)) return false;
-
- /* Undocumented rasterizer behavior:
- * Shift points horizontally by the updated left side bearing
- */
- contour_point_t delta;
- delta.init (-all_points[all_points.length - PHANTOM_COUNT + PHANTOM_LEFT].x, 0.f);
- if (delta.x) all_points.translate (delta);
- return true;
- }
-
- protected:
-
- bool get_var_extents_and_phantoms (hb_font_t *font, hb_codepoint_t gid,
- hb_glyph_extents_t *extents=nullptr /* OUT */,
- contour_point_vector_t *phantoms=nullptr /* OUT */) const
- {
- contour_point_vector_t all_points;
- if (!unlikely (get_points_bearing_applied (font, gid, all_points))) return false;
- if (extents)
- {
- contour_bounds_t bounds;
- for (unsigned int i = 0; i + PHANTOM_COUNT < all_points.length; i++)
- bounds.add (all_points[i]);
- bounds.get_extents (font, extents);
- }
- if (phantoms)
- for (unsigned int i = 0; i < PHANTOM_COUNT; i++)
- (*phantoms)[i] = all_points[all_points.length - PHANTOM_COUNT + i];
- return true;
- }
-
- bool get_var_metrics (hb_font_t *font, hb_codepoint_t gid,
- contour_point_vector_t &phantoms) const
- { return get_var_extents_and_phantoms (font, gid, nullptr, &phantoms); }
-
- bool get_extents_var (hb_font_t *font, hb_codepoint_t gid,
- hb_glyph_extents_t *extents) const
- { return get_var_extents_and_phantoms (font, gid, extents); }
-#endif
-
- public:
-#ifndef HB_NO_VAR
- unsigned int get_advance_var (hb_font_t *font, hb_codepoint_t gid,
- bool is_vertical) const
- {
- bool success = false;
- contour_point_vector_t phantoms;
- phantoms.resize (PHANTOM_COUNT);
-
- if (likely (font->num_coords == face->table.gvar->get_axis_count ()))
- success = get_var_metrics (font, gid, phantoms);
-
- if (unlikely (!success))
- return is_vertical ? face->table.vmtx->get_advance (gid) : face->table.hmtx->get_advance (gid);
-
- if (is_vertical)
- return roundf (phantoms[PHANTOM_TOP].y - phantoms[PHANTOM_BOTTOM].y);
- else
- return roundf (phantoms[PHANTOM_RIGHT].x - phantoms[PHANTOM_LEFT].x);
- }
-
- int get_side_bearing_var (hb_font_t *font, hb_codepoint_t gid, bool is_vertical) const
- {
- hb_glyph_extents_t extents;
- contour_point_vector_t phantoms;
- phantoms.resize (PHANTOM_COUNT);
-
- if (unlikely (!get_var_extents_and_phantoms (font, gid, &extents, &phantoms)))
- return is_vertical ? face->table.vmtx->get_side_bearing (gid) : face->table.hmtx->get_side_bearing (gid);
-
- return is_vertical ? ceil (phantoms[PHANTOM_TOP].y) - extents.y_bearing : floor (phantoms[PHANTOM_LEFT].x);
- }
-#endif
-
- bool get_extents (hb_font_t *font, hb_codepoint_t gid, hb_glyph_extents_t *extents) const
- {
-#ifndef HB_NO_VAR
- unsigned int coord_count;
- const int *coords = hb_font_get_var_coords_normalized (font, &coord_count);
- if (coords && coord_count > 0 && coord_count == face->table.gvar->get_axis_count ())
- return get_extents_var (font, gid, extents);
-#endif
-
- if (unlikely (gid >= num_glyphs)) return false;
-
- return glyph_for_gid (gid).get_extents (font, gid, extents);
- }
-
- const Glyph
- glyph_for_gid (hb_codepoint_t gid, bool needs_padding_removal = false) const
- {
- unsigned int start_offset, end_offset;
- if (unlikely (gid >= num_glyphs)) return Glyph ();
-
- 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 Glyph ();
-
- Glyph glyph (hb_bytes_t ((const char *) this->glyf_table + start_offset,
- end_offset - start_offset));
- return needs_padding_removal ? glyph.trim_padding () : glyph;
- }
-
- void
- add_gid_and_children (hb_codepoint_t gid, hb_set_t *gids_to_retain,
- unsigned int depth = 0) const
- {
- if (unlikely (depth++ > HB_MAX_NESTING_LEVEL)) return;
- /* Check if is already visited */
- if (gids_to_retain->has (gid)) return;
-
- gids_to_retain->add (gid);
-
- for (auto &item : glyph_for_gid (gid).get_composite_iterator ())
- add_gid_and_children (item.glyphIndex, gids_to_retain, depth);
- }
-
- private:
- bool short_offset;
- unsigned int num_glyphs;
- hb_blob_ptr_t<loca> loca_table;
- hb_blob_ptr_t<glyf> glyf_table;
- hb_face_t *face;
- };
-
- struct SubsetGlyph
- {
- hb_codepoint_t new_gid;
- 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,
- const hb_subset_plan_t *plan) const
- {
- TRACE_SERIALIZE (this);
-
- 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 = padding ();
- 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 (_.glyphIndex, &new_gid))
- ((OT::glyf::CompositeGlyphChain *) &_)->glyphIndex = new_gid;
- }
-
- if (plan->drop_hints) Glyph (dest_glyph).drop_hints ();
-
- return_trace (true);
- }
-
- 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 (); }
- };
-
- 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 {};
-
-} /* namespace OT */
-
+#include "OT/glyf/glyf.hh"
#endif /* HB_OT_GLYF_TABLE_HH */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 10:03:47 +0000