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| author | Bill Spitzak <spitzak@gmail.com> | 2016-03-06 17:06:47 -0800 |
|---|---|---|
| committer | Søren Sandmann Pedersen <soren.sandmann@gmail.com> | 2016-03-11 00:00:46 -0500 |
| commit | 7dce6261397e7faf34d8c2ce8dc870a2df074abf (patch) | |
| tree | 62183a63c4f79c2b34421dd44f9d8202ccba2cd5 | |
| parent | 0b7a6ab2382b7f3bd5cdf16a928eab2301a35a69 (diff) | |
pixman-filter: fix subsample_bits == 0
The position of only one subsample was wrong as ceil() was done on an integer.
Use a different function for all odd numbers of subsamples that gets this right.
Signed-off-by: Bill Spitzak <spitzak@gmail.com>
| -rw-r--r-- | pixman/pixman-filter.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/pixman/pixman-filter.c b/pixman/pixman-filter.c index ac89dda1..f9ad45f5 100644 --- a/pixman/pixman-filter.c +++ b/pixman/pixman-filter.c @@ -252,7 +252,10 @@ create_1d_filter (int width, * and sample positions. */ - pos = ceil (frac - width / 2.0 - 0.5) + 0.5 - frac; + if (n_phases & 1) + pos = frac - width / 2.0; + else + pos = ceil (frac - width / 2.0 - 0.5) + 0.5 - frac; total = 0; for (x = 0; x < width; ++x, ++pos) |