[lcar] Use multiformat convention
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@ -38,6 +38,80 @@ namespace AAT {
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typedef ArrayOf<HBINT16> LigCaretClassEntry;
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typedef ArrayOf<HBINT16> LigCaretClassEntry;
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struct lcarFormat0
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{
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unsigned int get_lig_carets (hb_font_t *font,
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hb_direction_t direction,
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hb_codepoint_t glyph,
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unsigned int start_offset,
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unsigned int *caret_count /* IN/OUT */,
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hb_position_t *caret_array /* OUT */,
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const void *base) const
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{
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const OffsetTo<LigCaretClassEntry>* entry_offset = lookupTable.get_value (glyph,
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font->face->get_num_glyphs ());
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const LigCaretClassEntry& array = entry_offset ? base+*entry_offset : Null (LigCaretClassEntry);
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if (caret_count)
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{
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hb_array_t<const HBINT16> arr = array.sub_array (start_offset, caret_count);
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for (unsigned int i = 0; i < arr.length; ++i)
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caret_array[i] = font->em_scale_dir (arr[i], direction);
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}
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return array.len;
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}
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bool sanitize (hb_sanitize_context_t *c, const void *base) const
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{
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TRACE_SANITIZE (this);
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return_trace (likely (c->check_struct (this) && lookupTable.sanitize (c, base)));
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}
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protected:
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Lookup<OffsetTo<LigCaretClassEntry>>
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lookupTable; /* data Lookup table associating glyphs */
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public:
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DEFINE_SIZE_MIN (2);
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};
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struct lcarFormat1
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{
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unsigned int get_lig_carets (hb_font_t *font,
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hb_direction_t direction,
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hb_codepoint_t glyph,
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unsigned int start_offset,
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unsigned int *caret_count /* IN/OUT */,
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hb_position_t *caret_array /* OUT */,
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const void *base) const
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{
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const OffsetTo<LigCaretClassEntry>* entry_offset = lookupTable.get_value (glyph,
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font->face->get_num_glyphs ());
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const LigCaretClassEntry& array = entry_offset ? base+*entry_offset : Null (LigCaretClassEntry);
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if (caret_count)
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{
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hb_array_t<const HBINT16> arr = array.sub_array (start_offset, caret_count);
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for (unsigned int i = 0; i < arr.length; ++i)
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{
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hb_position_t x = 0, y = 0;
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font->get_glyph_contour_point_for_origin (glyph, arr[i], direction, &x, &y);
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caret_array[i] = HB_DIRECTION_IS_HORIZONTAL (direction) ? x : y;
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}
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}
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return array.len;
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}
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bool sanitize (hb_sanitize_context_t *c, const void *base) const
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{
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TRACE_SANITIZE (this);
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return_trace (likely (c->check_struct (this) && lookupTable.sanitize (c, base)));
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}
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protected:
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Lookup<OffsetTo<LigCaretClassEntry>>
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lookupTable; /* data Lookup table associating glyphs */
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public:
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DEFINE_SIZE_MIN (2);
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};
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struct lcar
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struct lcar
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{
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{
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static constexpr hb_tag_t tableTag = HB_AAT_TAG_lcar;
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static constexpr hb_tag_t tableTag = HB_AAT_TAG_lcar;
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@ -49,45 +123,36 @@ struct lcar
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unsigned int *caret_count /* IN/OUT */,
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unsigned int *caret_count /* IN/OUT */,
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hb_position_t *caret_array /* OUT */) const
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hb_position_t *caret_array /* OUT */) const
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{
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{
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const OffsetTo<LigCaretClassEntry>* entry_offset = lookup.get_value (glyph,
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font->face->get_num_glyphs ());
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const LigCaretClassEntry& array = entry_offset ? this+*entry_offset : Null (LigCaretClassEntry);
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if (caret_count)
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{
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hb_array_t<const HBINT16> arr = array.sub_array (start_offset, caret_count);
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switch (format)
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switch (format)
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{
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{
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case 0:
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case 0: return u.format0.get_lig_carets (font, direction, glyph, start_offset,
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for (unsigned int i = 0; i < arr.length; ++i)
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caret_count, caret_array, this);
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caret_array[i] = font->em_scale_dir (arr[i], direction);
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case 1: return u.format1.get_lig_carets (font, direction, glyph, start_offset,
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break;
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caret_count, caret_array, this);
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case 1:
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default:if (caret_count) *caret_count = 0; return 0;
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for (unsigned int i = 0; i < arr.length; ++i)
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{
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hb_position_t x, y;
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font->get_glyph_contour_point_for_origin (glyph, arr[i], direction, &x, &y);
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caret_array[i] = HB_DIRECTION_IS_HORIZONTAL (direction) ? x : y;
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}
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}
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break;
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}
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}
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return array.len;
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}
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}
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bool sanitize (hb_sanitize_context_t *c) const
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bool sanitize (hb_sanitize_context_t *c) const
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{
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{
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TRACE_SANITIZE (this);
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TRACE_SANITIZE (this);
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return_trace (likely (c->check_struct (this) &&
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if (unlikely (!c->check_struct (this) || version.major != 1))
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version.major == 1 &&
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return_trace (false);
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lookup.sanitize (c, this)));
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switch (format) {
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case 0: return_trace (u.format0.sanitize (c, this));
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case 1: return_trace (u.format1.sanitize (c, this));
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default:return_trace (true);
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}
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}
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}
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protected:
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protected:
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FixedVersion<>version; /* Version number of the ligature caret table */
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FixedVersion<>version; /* Version number of the ligature caret table */
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HBUINT16 format; /* Format of the ligature caret table. */
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HBUINT16 format; /* Format of the ligature caret table. */
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Lookup<OffsetTo<LigCaretClassEntry>>
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union {
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lookup; /* data Lookup table associating glyphs */
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lcarFormat0 format0;
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lcarFormat0 format1;
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} u;
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public:
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public:
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DEFINE_SIZE_MIN (8);
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DEFINE_SIZE_MIN (8);
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};
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};
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