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[truetype/GX] Fix signed overflow.

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Fixes #1423.

* src/truetype/ttgxvar.c (tt_interpolate_deltas, tt_delta_interpolate):
Use unsigned counters.
This commit is contained in:
Alexei Podtelezhnikov 2026-04-27 22:33:16 -04:00
parent 5d1099341f
commit 0d45c7f191
1 changed files with 14 additions and 22 deletions
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36
src/truetype/ttgxvar.c
View file

@ -4062,14 +4062,14 @@
/* modeled after `af_iup_interp', `_iup_worker_interpolate', and */
/* `Ins_IUP' with spec differences in handling ill-defined cases. */
static void
tt_delta_interpolate( int p1,
int p2,
int ref1,
int ref2,
tt_delta_interpolate( FT_UInt p1,
FT_UInt p2,
FT_UInt ref1,
FT_UInt ref2,
FT_Vector* in_points,
FT_Vector* out_points )
{
int p, i;
FT_UInt p, i;
FT_Pos out, in1, in2, out1, out2, d1, d2;
@ -4135,24 +4135,18 @@
FT_Vector* in_points,
FT_Bool* has_delta )
{
FT_Int first_point;
FT_Int end_point;
FT_UInt first_point;
FT_UInt end_point;
FT_Int first_delta;
FT_Int cur_delta;
FT_UInt first_delta;
FT_UInt cur_delta;
FT_Int point;
FT_Short contour;
FT_UInt point;
FT_UInt contour;
/* ignore empty outlines */
if ( !outline->n_contours )
return;
contour = 0;
point = 0;
do
for ( point = 0, contour = 0;
contour < outline->n_contours; contour++ )
{
end_point = outline->contours[contour];
first_point = point;
@ -4213,9 +4207,7 @@
out_points );
}
}
contour++;
} while ( contour < outline->n_contours );
}
}