Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/harfbuzz/src/OT/glyf/SubsetGlyph.hh @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #ifndef OT_GLYF_SUBSETGLYPH_HH
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2 #define OT_GLYF_SUBSETGLYPH_HH
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5 #include "../../hb-open-type.hh"
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8 namespace OT {
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10 struct glyf_accelerator_t;
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12 namespace glyf_impl {
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15 struct SubsetGlyph
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16 {
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17 hb_codepoint_t old_gid;
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18 Glyph source_glyph;
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19 hb_bytes_t dest_start; /* region of source_glyph to copy first */
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20 hb_bytes_t dest_end; /* region of source_glyph to copy second */
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22 bool serialize (hb_serialize_context_t *c,
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23 bool use_short_loca,
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24 const hb_subset_plan_t *plan,
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25 hb_font_t *font)
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26 {
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27 TRACE_SERIALIZE (this);
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29 if (font)
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30 {
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31 const OT::glyf_accelerator_t &glyf = *font->face->table.glyf;
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32 if (!this->compile_bytes_with_deltas (plan, font, glyf))
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33 return_trace (false);
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34 }
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36 hb_bytes_t dest_glyph = dest_start.copy (c);
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37 dest_glyph = hb_bytes_t (&dest_glyph, dest_glyph.length + dest_end.copy (c).length);
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38 unsigned int pad_length = use_short_loca ? padding () : 0;
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39 DEBUG_MSG (SUBSET, nullptr, "serialize %d byte glyph, width %d pad %d", dest_glyph.length, dest_glyph.length + pad_length, pad_length);
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41 HBUINT8 pad;
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42 pad = 0;
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43 while (pad_length > 0)
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44 {
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45 c->embed (pad);
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46 pad_length--;
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47 }
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49 if (unlikely (!dest_glyph.length)) return_trace (true);
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51 /* update components gids */
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52 for (auto &_ : Glyph (dest_glyph).get_composite_iterator ())
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53 {
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54 hb_codepoint_t new_gid;
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55 if (plan->new_gid_for_old_gid (_.get_gid(), &new_gid))
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56 const_cast<CompositeGlyphRecord &> (_).set_gid (new_gid);
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57 }
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59 if (plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
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60 Glyph (dest_glyph).drop_hints ();
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62 if (plan->flags & HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG)
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63 Glyph (dest_glyph).set_overlaps_flag ();
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65 return_trace (true);
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66 }
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68 bool compile_bytes_with_deltas (const hb_subset_plan_t *plan,
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69 hb_font_t *font,
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70 const glyf_accelerator_t &glyf)
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71 { return source_glyph.compile_bytes_with_deltas (plan, font, glyf, dest_start, dest_end); }
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73 void free_compiled_bytes ()
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74 {
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75 dest_start.fini ();
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76 dest_end.fini ();
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77 }
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79 void drop_hints_bytes ()
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80 { source_glyph.drop_hints_bytes (dest_start, dest_end); }
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82 unsigned int length () const { return dest_start.length + dest_end.length; }
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83 /* pad to 2 to ensure 2-byte loca will be ok */
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84 unsigned int padding () const { return length () % 2; }
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85 unsigned int padded_size () const { return length () + padding (); }
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86 };
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89 } /* namespace glyf_impl */
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90 } /* namespace OT */
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93 #endif /* OT_GLYF_SUBSETGLYPH_HH */