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[VARC] Reduce stack use

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This commit is contained in:
Behdad Esfahbod 2025-02-16 10:37:21 -07:00
parent 4335e49a02
commit 0667ceae87
2 changed files with 18 additions and 13 deletions
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7
src/OT/Var/VARC/VARC.cc
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@ -339,13 +339,6 @@ VARC::get_path_at (hb_font_t *font,
signed *edges_left,
signed depth_left) const
{
hb_decycler_t stack_decycler;
if (decycler == nullptr)
decycler = &stack_decycler;
signed stack_edges = HB_MAX_GRAPH_EDGE_COUNT;
if (edges_left == nullptr)
edges_left = &stack_edges;
// Don't recurse on the same glyph.
unsigned idx = glyph == parent_glyph ?
NOT_COVERED :

24
src/OT/Var/VARC/VARC.hh
View file

@ -94,15 +94,27 @@ struct VARC
hb_codepoint_t glyph,
hb_draw_session_t &draw_session,
hb_array_t<const int> coords,
hb_transform_t transform = HB_TRANSFORM_IDENTITY,
hb_codepoint_t parent_glyph = HB_CODEPOINT_INVALID,
hb_decycler_t *decycler = nullptr,
signed *edges_left = nullptr,
signed depth_left = HB_MAX_NESTING_LEVEL) const;
hb_transform_t transform,
hb_codepoint_t parent_glyph,
hb_decycler_t *decycler,
signed *edges_left,
signed depth_left) const;
bool
get_path (hb_font_t *font, hb_codepoint_t gid, hb_draw_session_t &draw_session) const
{ return get_path_at (font, gid, draw_session, hb_array (font->coords, font->num_coords)); }
{
hb_decycler_t decycler;
signed edges = HB_MAX_GRAPH_EDGE_COUNT;
return get_path_at (font,
gid,
draw_session,
hb_array (font->coords, font->num_coords),
HB_TRANSFORM_IDENTITY,
HB_CODEPOINT_INVALID,
&decycler,
&edges,
HB_MAX_NESTING_LEVEL); }
bool paint_glyph (hb_font_t *font, hb_codepoint_t gid, hb_paint_funcs_t *funcs, void *data, hb_color_t foreground) const
{