tree e1f354471538f9484de7bd53eb9fafebd18f411a
parent 8bbcd5aab81dc0742c3367479c0c9d97363b1203
author caryclark <caryclark@google.com> 1473862700 -0700
committer Commit bot <commit-bot@chromium.org> 1473862700 -0700

Rewriting path writer

The path writer takes constructs the output path out of
curves that satisfy the pathop operation.

Curves contain lists of t/point pairs that may not be
comparable to each other. To match up curve ends in the
output path, look for adjacent curves to have a shared
membership rather than comparing point values.

Use path utilities to connect partial curve lists into
closed contours.

Share the angle code that determines if a curve has become
a degenerate line with the path writer.

Clean up some code on the way, and delete some unused
functions.

TBR=reed@google.com
BUG=5188
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2321973005

Review-Url: https://codereview.chromium.org/2321973005