Tests/LibPDF: Add test for embedded jbig2 cross-chunk ref

Tests/LibGfx/TestImageDecoder.cpp

@@ -407,7 +407,6 @@ TEST_CASE(test_jbig2_decode)
         // - immediate refinement regions referring to a direct region (code support added in #26197)
         // - immediate refinement regions referring to a direct region (code support added in #26197)
         //   - TPGRON set in refinement region (only reachable in standalone refinement regions)
-        // - in embedded organization, reference from segment in one chunk to segment in another chunk
         // Missing tests for things that aren't implemented yet:
         // - immediate refinement regions not referring to a direct region (i.e. refining the page)
         // - immediate lossless refinement regions

Tests/LibPDF/CMakeLists.txt

@@ -15,6 +15,7 @@ set(TEST_FILES
     encryption_nocopy.pdf
     group.pdf
     jbig2-globals.pdf
+    jbig2-globals-indirect-reference.pdf
     jpeg2000-indexed-small.pdf
     linearized.pdf
     non-linearized.pdf

Tests/LibPDF/TestPDF.cpp

@@ -131,7 +131,7 @@ TEST_CASE(encrypted_object_stream)
 
 TEST_CASE(resolve_indirect_reference_during_parsing)
 {
-    auto file = TRY_OR_FAIL(Core::MappedFile::map("jbig2-globals.pdf"sv));
+    auto file = TRY_OR_FAIL(Core::MappedFile::map("jbig2-globals-indirect-reference.pdf"sv));
     auto document = MUST(PDF::Document::create(file->bytes()));
     MUST(document->initialize());
     EXPECT_EQ(document->get_page_count(), 1U);
@@ -141,6 +141,19 @@ TEST_CASE(resolve_indirect_reference_during_parsing)
     EXPECT_EQ(jbig2_stream->bytes().size(), 20'000U);
 }
 
+TEST_CASE(jbig2_embedded_organization_cross_chunk_reference)
+{
+    auto file = TRY_OR_FAIL(Core::MappedFile::map("jbig2-globals.pdf"sv));
+    auto document = MUST(PDF::Document::create(file->bytes()));
+    MUST(document->initialize());
+    EXPECT_EQ(document->get_page_count(), 1U);
+
+    auto page = MUST(document->get_page(0));
+    auto page_size = Gfx::IntSize { 399, 400 };
+    auto bitmap = TRY_OR_FAIL(Gfx::Bitmap::create(Gfx::BitmapFormat::BGRx8888, page_size));
+    MUST(PDF::Renderer::render(document, page, bitmap, Color::White, PDF::RenderingPreferences {}));
+}
+
 TEST_CASE(malformed_pdf_document)
 {
     Array test_inputs = {