tree ce320556249cf02ff5659c37bb7f68862fc9f6e9
parent 1ed29b825ffd2e649d5667d25c2c8b84b517bf37
author Lei Zhang <thestig@chromium.org> 1629420174 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1629420174 +0000

Avoid a NOTREACHED() in CFX_DIBitmap::CompositeMask().

CFX_DIBitmap::CompositeMask() expects the input bitmap to be a mask.
CPDF_RenderStatus::ProcessType3Text() calls CompositeMask() without
checking this. Add the check to avoid hitting a NOTREACHED().

Bug: chromium:1241587
Change-Id: I9aab030b3091bdd069a389f4e00b623f19521ad3
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/84251
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>