tree bf2c464bf83e205377af9cbb5f17b32e14aa00b5
parent 4c472557b0e35fa07aff1f8cc6b8f23cb8e7bfa9
author Lei Zhang <thestig@chromium.org> 1621892827 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1621892827 +0000

Recognize more path points that form rectangles in CFX_PathData.

Right now, CFX_PathData only recognizes path points with 4 or 5 points
as rectangles. Change it to normalize path points with more points that
form rectangles. Then CFX_PathData can recognize more rectangles, and
AGG can draw them more efficiently. As a result, the slow rendering PDF
that triggered this investigation renders 77 times faster according to
safetynet_measure.py with callgrind.

With the faster rendering for rectangles, AGG draws a few PDFs slightly
differently. Update affected pixel test expectations and update DEPS to
adjust corpus tests expectations affected by this change.

Bug: pdfium:1683
Change-Id: I7042aa3a580bece650ef0b8fb67b091c5d220501
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/80914
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Hui Yingst <nigi@chromium.org>