pdfium-render 0.9.4 dynamically binds several optional struct-tree, text, font-map and page-move APIs that the pinned OHOS source no longer exports. Add a compatibility translation unit for the missing symbols so the library can load; the preview path only uses the core render APIs.
The source port exposes FPDF_GetDocPermissions with user semantics but no separate FPDF_GetDocUserPermissions symbol required by pdfium-render 0.9.4. Apply a pinned source patch that adds the compatibility entry point, and rebuild the CI artifact.
Report the underlying pdfium-render load error instead of discarding it. Component PDFium builds require libc++_shared.so; stage the matching SDK runtime beside libpdfium.so because the OHOS app namespace does not search /system/lib64 for it.
The OHOS port's default GN configuration is a component build and emits libpdfium.cr.so plus sibling .cr.so dependencies. Stage all component libraries beside a stable libpdfium.so and upload/checksum the complete set.
Add build-pdfium-source.sh for the OHOS PDFium port at a pinned source revision, using the local SDK through the port's ohos_sdk/18 path and staging a stripped libpdfium.so plus its license. Keep the checksum-pinned prebuilt as an offline fallback and package the source license when present.
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