GlyphHeader.hh (1519B)
1 #ifndef OT_GLYF_GLYPHHEADER_HH 2 #define OT_GLYF_GLYPHHEADER_HH 3 4 5 #include "../../hb-open-type.hh" 6 7 8 namespace OT { 9 namespace glyf_impl { 10 11 12 struct GlyphHeader 13 { 14 bool has_data () const { return numberOfContours; } 15 16 template <typename accelerator_t> 17 bool get_extents_without_var_scaled (hb_font_t *font, const accelerator_t &glyf_accelerator, 18 hb_codepoint_t gid, hb_glyph_extents_t *extents) const 19 { 20 /* Undocumented rasterizer behavior: shift glyph to the left by (lsb - xMin), i.e., xMin = lsb */ 21 /* extents->x_bearing = hb_min (glyph_header.xMin, glyph_header.xMax); */ 22 int lsb = hb_min (xMin, xMax); 23 (void) glyf_accelerator.hmtx->get_leading_bearing_without_var_unscaled (gid, &lsb); 24 extents->x_bearing = lsb; 25 extents->y_bearing = hb_max (yMin, yMax); 26 extents->width = hb_max (xMin, xMax) - hb_min (xMin, xMax); 27 extents->height = hb_min (yMin, yMax) - hb_max (yMin, yMax); 28 29 font->scale_glyph_extents (extents); 30 31 return true; 32 } 33 34 HBINT16 numberOfContours; 35 /* If the number of contours is 36 * greater than or equal to zero, 37 * this is a simple glyph; if negative, 38 * this is a composite glyph. */ 39 FWORD xMin; /* Minimum x for coordinate data. */ 40 FWORD yMin; /* Minimum y for coordinate data. */ 41 FWORD xMax; /* Maximum x for coordinate data. */ 42 FWORD yMax; /* Maximum y for coordinate data. */ 43 public: 44 DEFINE_SIZE_STATIC (10); 45 }; 46 47 48 } /* namespace glyf_impl */ 49 } /* namespace OT */ 50 51 52 #endif /* OT_GLYF_GLYPHHEADER_HH */