Improve behavior of Pdf.check() when jbig2 decoder is not available

1 files changed, 12 insertions, 1 deletions

diff --git a/src/qpdf/qpdf.cpp b/src/qpdf/qpdf.cpp
index f54aa33..effc524 100644
--- a/src/qpdf/qpdf.cpp
+++ b/src/qpdf/qpdf.cpp
@@ -807,7 +807,18 @@ void init_qpdf(py::module_ &m)
                 Pl_Discard discard;
                 w.setOutputPipeline(&discard);
                 w.setDecodeLevel(qpdf_dl_all);
-                w.write();
+                try {
+                    w.write();
+                } catch (py::error_already_set &e) {
+                    auto cls_dependency_error =
+                        py::module_::import("pikepdf.models.image").attr("DependencyError");
+                    if (e.matches(cls_dependency_error)) {
+                        w.setDecodeLevel(qpdf_dl_generalized);
+                        w.write();
+                    } else {
+                        throw;
+                    }
+                }
             })
         .def_property_readonly(
             "_allow_accessibility", [](QPDF &q) { return q.allowAccessibility(); })