diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-maxp-table.hh')
-rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-maxp-table.hh | 93 |
1 files changed, 81 insertions, 12 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-maxp-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-maxp-table.hh index f6d283eb14..1c25eda16b 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-maxp-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-maxp-table.hh @@ -27,40 +27,109 @@ #ifndef HB_OT_MAXP_TABLE_HH #define HB_OT_MAXP_TABLE_HH -#include "hb-open-type-private.hh" - +#include "hb-open-type.hh" namespace OT { /* - * maxp -- The Maximum Profile Table + * maxp -- Maximum Profile + * https://docs.microsoft.com/en-us/typography/opentype/spec/maxp */ #define HB_OT_TAG_maxp HB_TAG('m','a','x','p') +struct maxpV1Tail +{ + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + HBUINT16 maxPoints; /* Maximum points in a non-composite glyph. */ + HBUINT16 maxContours; /* Maximum contours in a non-composite glyph. */ + HBUINT16 maxCompositePoints; /* Maximum points in a composite glyph. */ + HBUINT16 maxCompositeContours; /* Maximum contours in a composite glyph. */ + HBUINT16 maxZones; /* 1 if instructions do not use the twilight zone (Z0), + * or 2 if instructions do use Z0; should be set to 2 in + * most cases. */ + HBUINT16 maxTwilightPoints; /* Maximum points used in Z0. */ + HBUINT16 maxStorage; /* Number of Storage Area locations. */ + HBUINT16 maxFunctionDefs; /* Number of FDEFs, equal to the highest function number + 1. */ + HBUINT16 maxInstructionDefs; /* Number of IDEFs. */ + HBUINT16 maxStackElements; /* Maximum stack depth. (This includes Font and CVT + * Programs, as well as the instructions for each glyph.) */ + HBUINT16 maxSizeOfInstructions; /* Maximum byte count for glyph instructions. */ + HBUINT16 maxComponentElements; /* Maximum number of components referenced at + * "top level" for any composite glyph. */ + HBUINT16 maxComponentDepth; /* Maximum levels of recursion; 1 for simple components. */ + public: + DEFINE_SIZE_STATIC (26); +}; + + struct maxp { - static const hb_tag_t tableTag = HB_OT_TAG_maxp; + static constexpr hb_tag_t tableTag = HB_OT_TAG_maxp; + + unsigned int get_num_glyphs () const { return numGlyphs; } - inline unsigned int get_num_glyphs (void) const + void set_num_glyphs (unsigned int count) { - return numGlyphs; + numGlyphs = count; } - inline bool sanitize (hb_sanitize_context_t *c) const + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - likely (version.major == 1 || - (version.major == 0 && version.minor == 0x5000u))); + if (unlikely (!c->check_struct (this))) + return_trace (false); + + if (version.major == 1) + { + const maxpV1Tail &v1 = StructAfter<maxpV1Tail> (*this); + return_trace (v1.sanitize (c)); + } + return_trace (likely (version.major == 0 && version.minor == 0x5000u)); + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + maxp *maxp_prime = c->serializer->embed (this); + if (unlikely (!maxp_prime)) return_trace (false); + + maxp_prime->numGlyphs = c->plan->num_output_glyphs (); + if (maxp_prime->version.major == 1) + { + const maxpV1Tail *src_v1 = &StructAfter<maxpV1Tail> (*this); + maxpV1Tail *dest_v1 = c->serializer->embed<maxpV1Tail> (src_v1); + if (unlikely (!dest_v1)) return_trace (false); + + if (c->plan->drop_hints) + drop_hint_fields (dest_v1); + } + + return_trace (true); + } + + static void drop_hint_fields (maxpV1Tail* dest_v1) + { + dest_v1->maxZones = 1; + dest_v1->maxTwilightPoints = 0; + dest_v1->maxStorage = 0; + dest_v1->maxFunctionDefs = 0; + dest_v1->maxInstructionDefs = 0; + dest_v1->maxStackElements = 0; + dest_v1->maxSizeOfInstructions = 0; } - /* We only implement version 0.5 as none of the extra fields in version 1.0 are useful. */ protected: FixedVersion<>version; /* Version of the maxp table (0.5 or 1.0), * 0x00005000u or 0x00010000u. */ - UINT16 numGlyphs; /* The number of glyphs in the font. */ + HBUINT16 numGlyphs; /* The number of glyphs in the font. */ +/*maxpV1Tail v1Tail[HB_VAR_ARRAY]; */ public: DEFINE_SIZE_STATIC (6); }; |