The subsampling can be ignored as all the filters are identical.
Code trying to duplicate PIXMAN_FILTER_NEAREST may generate this, so
it may pay off to have this optimization.
---
pixman/pixman-filter.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/pixman/pixman-filter.c b/pixman/pixman-filter.c
index 78ea72d..d763138 100644
--- a/pixman/pixman-filter.c
+++ b/pixman/pixman-filter.c
@@ -230,6 +230,8 @@ filter_width (pixman_kernel_t reconstruct,
pixman_kernel_t sample,
double scale)
{
+ if (reconstruct == PIXMAN_KERNEL_BOX && sample == PIXMAN_KERNEL_IMPULSE)
+ return 0;
return ceil(scale * filters[sample].width + filters[reconstruct].width);
}
--
1.7.9.5
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