diff options
| author | Bill Spitzak <spitzak@gmail.com> | 2016-03-06 17:06:49 -0800 |
|---|---|---|
| committer | Søren Sandmann Pedersen <soren.sandmann@gmail.com> | 2016-03-11 00:00:46 -0500 |
| commit | ff2bb4dc182b1f71cab0447af348e246b3c10c04 (patch) | |
| tree | b65d07c546d293b150bf67caa6dc1402a6640079 | |
| parent | e504c3524ed454f47838541321737a499d2e5665 (diff) | |
pixman-filter: Do BOX.BOX much faster
The desired result from the integration is directly available, as the range has been
clipped to the intersection of the two boxes. As this filter is probably the most
common one, this optimization looks very useful.
Signed-off-by: Bill Spitzak <spitzak@gmail.com>
| -rw-r--r-- | pixman/pixman-filter.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/pixman/pixman-filter.c b/pixman/pixman-filter.c index 6d589c2b..8dfb49be 100644 --- a/pixman/pixman-filter.c +++ b/pixman/pixman-filter.c @@ -171,6 +171,11 @@ integral (pixman_kernel_t kernel1, { return filters[kernel2].func (-pos * scale) * scale; } + else if (kernel1 == PIXMAN_KERNEL_BOX && kernel2 == PIXMAN_KERNEL_BOX) + { + assert (high <= low + 1.0); + return (high - low) * scale; + } /* If the integration interval crosses zero, break it into * two separate integrals. This ensures that filters such * as LINEAR that are not differentiable at 0 will still |