diff options
| author | Bill Spitzak <spitzak@gmail.com> | 2016-08-30 22:03:14 -0700 |
|---|---|---|
| committer | Søren Sandmann Pedersen <soren.sandmann@gmail.com> | 2016-09-03 14:53:07 -0400 |
| commit | d286078b28bdef15aa0498e6e7ec7da68a42bfeb (patch) | |
| tree | 61e02e21e135679acb8d9b273377c7223245047d | |
| parent | 133142449b22fc2799d922479514e677ae91f0f5 (diff) | |
pixman-filter: Nested polynomial for cubic
v11: Restored range checks
Signed-off-by: Bill Spitzak <spitzak@gmail.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
| -rw-r--r-- | pixman/pixman-filter.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/pixman/pixman-filter.c b/pixman/pixman-filter.c index ee58045..3318893 100644 --- a/pixman/pixman-filter.c +++ b/pixman/pixman-filter.c @@ -109,14 +109,16 @@ general_cubic (double x, double B, double C) if (ax < 1) { - return ((12 - 9 * B - 6 * C) * ax * ax * ax + - (-18 + 12 * B + 6 * C) * ax * ax + (6 - 2 * B)) / 6; + return (((12 - 9 * B - 6 * C) * ax + + (-18 + 12 * B + 6 * C)) * ax * ax + + (6 - 2 * B)) / 6; } - else if (ax >= 1 && ax < 2) + else if (ax < 2) { - return ((-B - 6 * C) * ax * ax * ax + - (6 * B + 30 * C) * ax * ax + (-12 * B - 48 * C) * - ax + (8 * B + 24 * C)) / 6; + return ((((-B - 6 * C) * ax + + (6 * B + 30 * C)) * ax + + (-12 * B - 48 * C)) * ax + + (8 * B + 24 * C)) / 6; } else { |