tree ab813e4345c7030d980464901232d3941b31d923
parent dcb27a39603ebea1f5bb4207d7b68315b088b743
author K. Moon <kmoon@chromium.org> 1679246925 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1679246925 +0000

Add pixel test for transparency group compositing

Adds a pixel test that composites a transparency group using either
constant alpha, or a soft mask. This test currently fails if
ProcessTransparency() does not wrap CFX_DIBitmap::MultiplyAlpha() with
UnPreMultiply() and PreMultiply() operations.

Bug: pdfium:1949
Change-Id: Ie9ade84b96f3ed40d36526d4bf4028a85b3d345a
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/105071
Commit-Queue: K. Moon <kmoon@chromium.org>
Reviewed-by: Nigi <nigi@chromium.org>