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* src/truetype/ttinterp.c (TT_RunIns): Adjust loop detector limits.

This commit is contained in:
Werner Lemberg 2017-01-20 10:16:38 +01:00
parent a32270ae0e
commit 43061d6a93
2 changed files with 15 additions and 5 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2017-01-20 Werner Lemberg <wl@gnu.org>
* src/truetype/ttinterp.c (TT_RunIns): Adjust loop detector limits.
2017-01-17 Werner Lemberg <wl@gnu.org>
* include/freetype/ttnameid.h: Updated to OpenType 1.8.1.

16
src/truetype/ttinterp.c
View File

@ -7611,15 +7611,21 @@
/* the number of points in the current glyph (if applicable). */
/* */
/* The idea is that in real-world bytecode you either iterate over */
/* all CVT entries, or over all points (or contours) of a glyph, and */
/* such iterations don't happen very often. */
/* all CVT entries (in the `prep' table), or over all points (or */
/* contours, in the `glyf' table) of a glyph, and such iterations */
/* don't happen very often. */
exc->loopcall_counter = 0;
exc->neg_jump_counter = 0;
/* The maximum values are heuristic. */
exc->loopcall_counter_max = FT_MAX( 100,
10 * ( exc->pts.n_points +
exc->cvtSize ) );
if ( exc->pts.n_points )
exc->loopcall_counter_max = FT_MAX( 50,
10 * exc->pts.n_points ) +
FT_MAX( 50,
exc->cvtSize / 10 );
else
exc->loopcall_counter_max = FT_MAX( 100,
5 * exc->cvtSize );
FT_TRACE5(( "TT_RunIns: Limiting total number of loops in LOOPCALL"
" to %d\n", exc->loopcall_counter_max ));