diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/OT/glyf/path-builder.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/OT/glyf/path-builder.hh | 117 |
1 files changed, 86 insertions, 31 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/OT/glyf/path-builder.hh b/src/3rdparty/harfbuzz-ng/src/OT/glyf/path-builder.hh index 9bfc45a1a6..f550524503 100644 --- a/src/3rdparty/harfbuzz-ng/src/OT/glyf/path-builder.hh +++ b/src/3rdparty/harfbuzz-ng/src/OT/glyf/path-builder.hh @@ -21,29 +21,33 @@ struct path_builder_t operator bool () const { return has_data; } bool has_data = false; - float x = 0.; - float y = 0.; + float x; + float y; - optional_point_t lerp (optional_point_t p, float t) - { return optional_point_t (x + t * (p.x - x), y + t * (p.y - y)); } - } first_oncurve, first_offcurve, last_offcurve; + optional_point_t mid (optional_point_t p) + { return optional_point_t ((x + p.x) * 0.5f, (y + p.y) * 0.5f); } + } first_oncurve, first_offcurve, first_offcurve2, last_offcurve, last_offcurve2; - path_builder_t (hb_font_t *font_, hb_draw_session_t &draw_session_) - { - font = font_; - draw_session = &draw_session_; - first_oncurve = first_offcurve = last_offcurve = optional_point_t (); - } + path_builder_t (hb_font_t *font_, hb_draw_session_t &draw_session_) : + font (font_), draw_session (&draw_session_) {} /* based on https://github.com/RazrFalcon/ttf-parser/blob/4f32821/src/glyf.rs#L287 See also: * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM01/Chap1.html - * https://stackoverflow.com/a/20772557 */ + * https://stackoverflow.com/a/20772557 + * + * Cubic support added. */ + HB_ALWAYS_INLINE void consume_point (const contour_point_t &point) { bool is_on_curve = point.flag & glyf_impl::SimpleGlyph::FLAG_ON_CURVE; +#ifdef HB_NO_CUBIC_GLYF + bool is_cubic = false; +#else + bool is_cubic = !is_on_curve && (point.flag & glyf_impl::SimpleGlyph::FLAG_CUBIC); +#endif optional_point_t p (font->em_fscalef_x (point.x), font->em_fscalef_y (point.y)); - if (!first_oncurve) + if (unlikely (!first_oncurve)) { if (is_on_curve) { @@ -52,9 +56,14 @@ struct path_builder_t } else { - if (first_offcurve) + if (is_cubic && !first_offcurve2) + { + first_offcurve2 = first_offcurve; + first_offcurve = p; + } + else if (first_offcurve) { - optional_point_t mid = first_offcurve.lerp (p, .5f); + optional_point_t mid = first_offcurve.mid (p); first_oncurve = mid; last_offcurve = p; draw_session->move_to (mid.x, mid.y); @@ -69,16 +78,41 @@ struct path_builder_t { if (is_on_curve) { - draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, - p.x, p.y); + if (last_offcurve2) + { + draw_session->cubic_to (last_offcurve2.x, last_offcurve2.y, + last_offcurve.x, last_offcurve.y, + p.x, p.y); + last_offcurve2 = optional_point_t (); + } + else + draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, + p.x, p.y); last_offcurve = optional_point_t (); } else { - optional_point_t mid = last_offcurve.lerp (p, .5f); - draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, - mid.x, mid.y); - last_offcurve = p; + if (is_cubic && !last_offcurve2) + { + last_offcurve2 = last_offcurve; + last_offcurve = p; + } + else + { + optional_point_t mid = last_offcurve.mid (p); + + if (is_cubic) + { + draw_session->cubic_to (last_offcurve2.x, last_offcurve2.y, + last_offcurve.x, last_offcurve.y, + mid.x, mid.y); + last_offcurve2 = optional_point_t (); + } + else + draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, + mid.x, mid.y); + last_offcurve = p; + } } } else @@ -90,23 +124,44 @@ struct path_builder_t } } - if (point.is_end_point) + if (unlikely (point.is_end_point)) { if (first_offcurve && last_offcurve) { - optional_point_t mid = last_offcurve.lerp (first_offcurve, .5f); - draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, - mid.x, mid.y); + optional_point_t mid = last_offcurve.mid (first_offcurve2 ? + first_offcurve2 : + first_offcurve); + if (last_offcurve2) + draw_session->cubic_to (last_offcurve2.x, last_offcurve2.y, + last_offcurve.x, last_offcurve.y, + mid.x, mid.y); + else + draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, + mid.x, mid.y); last_offcurve = optional_point_t (); - /* now check the rest */ } + /* now check the rest */ if (first_offcurve && first_oncurve) - draw_session->quadratic_to (first_offcurve.x, first_offcurve.y, - first_oncurve.x, first_oncurve.y); + { + if (first_offcurve2) + draw_session->cubic_to (first_offcurve2.x, first_offcurve2.y, + first_offcurve.x, first_offcurve.y, + first_oncurve.x, first_oncurve.y); + else + draw_session->quadratic_to (first_offcurve.x, first_offcurve.y, + first_oncurve.x, first_oncurve.y); + } else if (last_offcurve && first_oncurve) - draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, - first_oncurve.x, first_oncurve.y); + { + if (last_offcurve2) + draw_session->cubic_to (last_offcurve2.x, last_offcurve2.y, + last_offcurve.x, last_offcurve.y, + first_oncurve.x, first_oncurve.y); + else + draw_session->quadratic_to (last_offcurve.x, last_offcurve.y, + first_oncurve.x, first_oncurve.y); + } else if (first_oncurve) draw_session->line_to (first_oncurve.x, first_oncurve.y); else if (first_offcurve) @@ -117,7 +172,7 @@ struct path_builder_t } /* Getting ready for the next contour */ - first_oncurve = first_offcurve = last_offcurve = optional_point_t (); + first_oncurve = first_offcurve = last_offcurve = last_offcurve2 = optional_point_t (); draw_session->close_path (); } } |