tree 96713c3b64be2661e957b8e781dc395a297b1fe4
parent 6ae281fbb7a02b94a3900b6677a51cdd28096ed7
author Bill Spitzak <spitzak@gmail.com> 1472619791 -0700
committer Søren Sandmann Pedersen <soren.sandmann@gmail.com> 1472791212 -0400

pixman-filter: integral splitting is only needed for triangle filter

Only the triangle is discontinuous at 0. The other filters resemble a
cubic closely enough that Simpsons integration works without
splitting.

Changes by Søren: Rebase without the changes to the integral function,
update comment to match the new code.

Signed-off-by: Bill Spitzak <spitzak@gmail.com>
Signed-off-by: Søren Sandmann <soren.sandmann@gmail.com>
Reviewed-by: Søren Sandmann <soren.sandmann@gmail.com>