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Merge branch 'fix_infinite_loop' into 'master'

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_arc_max_angle_for_tolerance_normalized: fix infinite loop

See merge request cairo/cairo!155
This commit is contained in:
Heiko Lewin 2021-08-01 11:16:04 +00:00
commit 4dd48f0979
1 changed files with 3 additions and 1 deletions
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src/cairo-arc.c
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@ -90,16 +90,18 @@ _arc_max_angle_for_tolerance_normalized (double tolerance)
{ M_PI / 11.0, 9.81410988043554039085e-09 },
};
int table_size = ARRAY_LENGTH (table);
const int max_segments = 1000; /* this value is chosen arbitrarily. this gives an error of about 1.74909e-20 */
for (i = 0; i < table_size; i++)
if (table[i].error < tolerance)
return table[i].angle;
++i;
do {
angle = M_PI / i++;
error = _arc_error_normalized (angle);
} while (error > tolerance);
} while (error > tolerance && i < max_segments);
return angle;
}