tree 0c6f8bd52c3ca5f85fcabd2472dd2ee5d434c28c
parent b09ef8afcb402cd47f566e43dc4aae4fce85bce8
author Karim <abdelkarim.se@gmail.com> 1675899118 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1675899118 +0000

Fix rendering of stencil mask painted with tiling patterns

The stencil mask is painted with two patterns:
- first: a single cell with page dimensions, only the top half
         is filled black
- second: same as the first, but the second half is filled black

This combination should give us an output where both rectangles
are black. Because of this bug in pdfium, only the second is
black. This is due to the render device used to draw pattern image
being initialized with RGB color and filled white.
- the first pattern with the stencil mask, produces an output
  where the first rect is black second is white
- the second pattern with the stencil mask, produces an output
  where first rect is white second is black (overriding the previous
  pattern output)

Bug: pdfium:1966
Change-Id: I97fa5e30640d7a0d1d7e1970c2fbe96fcb3a85c2
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/102850
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>