tree 84a7d15c02ec166467a8def9190d5a453a61e060
parent 10d48c7fd285f51e424fbaaaf3aa26f73cc6077a
author Lei Zhang <thestig@chromium.org> 1603302336 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1603302336 +0000

Disallow more CFX_ScanlineCompositor conversions.

Disallow the combination where the destination bitmap format uses
palettes and the reverse byte order bit is set. CFX_ScanlineCompositor
is not designed to handle this case, and will end up doing the wrong
thing. e.g. for a source format of `FXDIB_Argb` and destination format
of `FXDIB_8bppRgba`, it will call
CompositeRow_Rgb2Argb_NoBlend_NoClip_RgbByteOrder(), which is
completely nonsensical.

Bug: chromium:1139825
Change-Id: I6a4d7a402d4006d7454188cf9f66daa04ed98062
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/75470
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>