tree 266f67e9e2de30e5e25c8bc8b4b013ee81fbc40a
parent e370bb4dda299adc3133b5b23b9d56cdf11a0f5d
author Hui Yingst <nigi@chromium.org> 1672856441 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1672856441 +0000

[Skia] Fix an assertion error

CFX_SkiaDeviceDriver::SetBitsWithMask() passes 2 bitmap inputs to
Upsample() and Upsample() requires the input bitmaps to be
premultiplied. This requires the CalculateDrawImage() to guarantee
that `bitmap_device1` is qualified to be a premultiplied bitmap
despite its format `FXDIB_Format::kRgb32` doesn't have an alpha
channel.

This CL fills the `bitmap_device1`'s alpha channel with 0xFF so that
after calling CalculateDrawImage(), `bitmap_device1` can be considered
"premultiplied".

Bug: chromium:1395648
Change-Id: I81f32f131be752787d3a1bfde883bf48cd59ac2d
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/102950
Reviewed-by: K. Moon <kmoon@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>