tree e8a88e10a99a4bfdd7ffd7eab96583dbc27a756c
parent c3099d1c694251a654edc6cb72df8adb5e2268ab
author Lei Zhang <thestig@chromium.org> 1537377994 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1537377994 +0000

Validate decoder pipelines.

PDF decoders, AKA filters, can be chained together. There can be
an arbitrary number of decoding / decompressing filters in the pipeline,
but there should be at most 1 image decoder, and the image decoder
should only be at the end of the chain.

BUG=chromium:880675

Change-Id: Iffa27c70ec1ed7574e38e0de23413840ee900959
Reviewed-on: https://pdfium-review.googlesource.com/42711
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>