tree 7e0d26d930052e335c5135f470087af6d19309f7
parent adba14abeda8e249bb885a0d647a766b149b0154
author Patrik Weiskircher <patrik@pspdfkit.com> 1557360299 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1557360299 +0000

Provide correct state to pattern rendering. (try 2)

According to 8.7.3.1 in the PDF 2.0 spec, a tiling pattern should
install the graphics state that was in effect at the beginning of the
pattern’s parent content stream.

The first attempt in commit f188aca283d6dceb874bbe5e20d8003e6bbe184f got
reverted because of an ASAN fuzzer issue.

Those issues have been fixed by not caching the `CPDF_Form` in the
`CPDF_TilingPattern` and simply returning it in a `std::unique_ptr`.

In addition to that the regressions found in bug 1288 have also
been fixed and relevant test cases have been added.

Bug: pdfium:1286
Change-Id: I013dd59587caa9be32963c51934f5030ef1e72fb
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/53831
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>