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freetype2
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Code Issues 4 Releases Wiki Activity

[truetype] Round phantom points after instructions. 

According to specifications, phantom points might be instructed to
fit them to grid. Then rounding them before instructions might
interfere. Other points are not touched before instructions
either.

* src/truetype/ttgload.c (TT_Hint_Glyph): Delay phantom point
rounding until after instructions are applied.
This commit is contained in:
Alexei Podtelezhnikov 2023-03-07 17:35:15 +00:00
parent d5c6b948ac
commit 839905475e
1 changed files with 10 additions and 14 deletions
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24
src/truetype/ttgload.c
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@ -864,19 +864,6 @@
loader->exec->metrics.x_scale = loader->size->metrics->x_scale;
loader->exec->metrics.y_scale = loader->size->metrics->y_scale;
}
#endif
/* round phantom points */
zone->cur[zone->n_points - 4].x =
FT_PIX_ROUND( zone->cur[zone->n_points - 4].x );
zone->cur[zone->n_points - 3].x =
FT_PIX_ROUND( zone->cur[zone->n_points - 3].x );
zone->cur[zone->n_points - 2].y =
FT_PIX_ROUND( zone->cur[zone->n_points - 2].y );
zone->cur[zone->n_points - 1].y =
FT_PIX_ROUND( zone->cur[zone->n_points - 1].y );
#ifdef TT_USE_BYTECODE_INTERPRETER
if ( n_ins > 0 )
{
@ -900,8 +887,17 @@
current_outline.tags[0] |=
( loader->exec->GS.scan_type << 5 ) | FT_CURVE_TAG_HAS_SCANMODE;
}
#endif /* TT_USE_BYTECODE_INTERPRETER */
#endif
/* round phantom points */
zone->cur[zone->n_points - 4].x =
FT_PIX_ROUND( zone->cur[zone->n_points - 4].x );
zone->cur[zone->n_points - 3].x =
FT_PIX_ROUND( zone->cur[zone->n_points - 3].x );
zone->cur[zone->n_points - 2].y =
FT_PIX_ROUND( zone->cur[zone->n_points - 2].y );
zone->cur[zone->n_points - 1].y =
FT_PIX_ROUND( zone->cur[zone->n_points - 1].y );
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
/* Save possibly modified glyph phantom points unless in v40 backward */