tree 025988165edc535819b5c7f49b5e37d725ff170d
parent 69703b37cc02aceac37b504d34b50f1c3c24302a
author Lei Zhang <thestig@chromium.org> 1680293184 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1680293184 +0000

Keep track of ExtGState resources

For all CPDF_PageObjects types, keep track of the ExtGState resources
associated with them. Using this data, CPDF_PageContentGenerator can
detect and remove unused resources from resources dictionaries. Then
CPDF_Creator can detect the unreferenced resources and remove them when
saving.

Bug: chromium:1428724,pdfium:1409
Change-Id: I786a515b4ddcfa9ea2dccb94d3d7ad6a189ec7ce
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/105614
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>