tree 5a92979d9d804b3e56fc5e6bfe1930c5d35263b9
parent 2f4dd8493bf4ca2a6c6097eb83166088faafbe31
author Hui Yingst <nigi@chromium.org> 1649208519 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1649208519 +0000

[Skia] Fix mask blending issues.

When painting a mask-format image, it can be treated as an individual
image ready to be painted or it can be used as the mask of another
image. For the former case, it's used as an image instead of a color
filter.

Based on the existing SetBitmapPaint(), this CL applies the following
changes for these two cases:

- Calls SetBitmapPaint() only for the former case: Make this function
  set the paint color since a image-format bitmap must be
  1-bit-per-component and doesn't contain the color information from
  the graphic state (if it's available). Also avoids setting color
  filter in this function.

- Creates SetBitmapPaintForMerge() which applies color filter to the
  SkPaint and only call this function for the latter case.

Bug: pdfium:1746, pdfium:1747, pdfium:1749
Change-Id: I6f363d0316375eea302a29804def049934851ddc
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/92312
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>