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comparison mupdf-source/thirdparty/harfbuzz/src/OT/glyf/SubsetGlyph.hh @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 #ifndef OT_GLYF_SUBSETGLYPH_HH
2 #define OT_GLYF_SUBSETGLYPH_HH
3
4
5 #include "../../hb-open-type.hh"
6
7
8 namespace OT {
9
10 struct glyf_accelerator_t;
11
12 namespace glyf_impl {
13
14
15 struct SubsetGlyph
16 {
17 hb_codepoint_t old_gid;
18 Glyph source_glyph;
19 hb_bytes_t dest_start; /* region of source_glyph to copy first */
20 hb_bytes_t dest_end; /* region of source_glyph to copy second */
21
22 bool serialize (hb_serialize_context_t *c,
23 bool use_short_loca,
24 const hb_subset_plan_t *plan,
25 hb_font_t *font)
26 {
27 TRACE_SERIALIZE (this);
28
29 if (font)
30 {
31 const OT::glyf_accelerator_t &glyf = *font->face->table.glyf;
32 if (!this->compile_bytes_with_deltas (plan, font, glyf))
33 return_trace (false);
34 }
35
36 hb_bytes_t dest_glyph = dest_start.copy (c);
37 dest_glyph = hb_bytes_t (&dest_glyph, dest_glyph.length + dest_end.copy (c).length);
38 unsigned int pad_length = use_short_loca ? padding () : 0;
39 DEBUG_MSG (SUBSET, nullptr, "serialize %d byte glyph, width %d pad %d", dest_glyph.length, dest_glyph.length + pad_length, pad_length);
40
41 HBUINT8 pad;
42 pad = 0;
43 while (pad_length > 0)
44 {
45 c->embed (pad);
46 pad_length--;
47 }
48
49 if (unlikely (!dest_glyph.length)) return_trace (true);
50
51 /* update components gids */
52 for (auto &_ : Glyph (dest_glyph).get_composite_iterator ())
53 {
54 hb_codepoint_t new_gid;
55 if (plan->new_gid_for_old_gid (_.get_gid(), &new_gid))
56 const_cast<CompositeGlyphRecord &> (_).set_gid (new_gid);
57 }
58
59 if (plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
60 Glyph (dest_glyph).drop_hints ();
61
62 if (plan->flags & HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG)
63 Glyph (dest_glyph).set_overlaps_flag ();
64
65 return_trace (true);
66 }
67
68 bool compile_bytes_with_deltas (const hb_subset_plan_t *plan,
69 hb_font_t *font,
70 const glyf_accelerator_t &glyf)
71 { return source_glyph.compile_bytes_with_deltas (plan, font, glyf, dest_start, dest_end); }
72
73 void free_compiled_bytes ()
74 {
75 dest_start.fini ();
76 dest_end.fini ();
77 }
78
79 void drop_hints_bytes ()
80 { source_glyph.drop_hints_bytes (dest_start, dest_end); }
81
82 unsigned int length () const { return dest_start.length + dest_end.length; }
83 /* pad to 2 to ensure 2-byte loca will be ok */
84 unsigned int padding () const { return length () % 2; }
85 unsigned int padded_size () const { return length () + padding (); }
86 };
87
88
89 } /* namespace glyf_impl */
90 } /* namespace OT */
91
92
93 #endif /* OT_GLYF_SUBSETGLYPH_HH */