The problem is that the graphics cache only counts the size of the SVG
text, which is stored in SvgData::maSvgDataArray. However the
SvgData::maSequence may use a lot more memory, as it may contain
de-compressed bitmaps that are stored as base64-encoded PNGs in the SVG
text.
For example icon-themes/galaxy/brand/flat_logo.svg is 812 Ko but contains
60 Mo of bitmaps.
This may cause excessive memory usage and failure to export documents
due to OOM; according to valgrind massif, the bitmap buffers use 90% of
the heap.
Add a new interface com::sun:⭐:util::XAccounting, and implement
it in drawinglayer BasePrimitive2D. VCL SvgData can't access
drawinglayer via C++ directly so this looks like the best approach.
Change-Id: I5a7c3147733e23473c1decabed24c1f79d951c7d
Reviewed-on: https://gerrit.libreoffice.org/30669
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>
f9028f1945