Add test validating that images in nested XObjects are included in optimization

The sample file (nested-images.pdf) includes a pdf with an image that is nested within an XObject within an XObject in the Resources dict of the only page. These images were ignored in prior versions of qpdf.

Add test validating that images in nested XObjects are included in optimization
The sample file (nested-images.pdf) includes a pdf with an image that is nested within an XObject within an XObject in the Resources dict of the only page. These images were ignored in prior versions of qpdf.
Connor Osborn
1 parent 8de2497a
Showing 4 changed files with 22 additions and 0 deletions
qpdf/qtest/image-optimization.test
qpdf/qtest/qpdf/nested-images.pdf
qpdf/qtest/qpdf/optimize-images-nested-images-json.out
qpdf/qtest/qpdf/optimize-images-nested-images.out
@@ -33,6 +33,8 @@ my @image_opt = (
     ['large-inline-image', 'inline-images-keep-all', '--keep-inline-images'],
     ['unsupported-optimization', 'unsupported',
      '--oi-min-width=0 --oi-min-height=0 --oi-min-area=0'],
+    ['nested-images', 'nested-images',
+     '--oi-min-width=0 --oi-min-height=0 --oi-min-area=0']
     );
  
 my $n_tests = 2 * scalar(@image_opt);
+{
+  "version": 2,
+  "parameters": {
+    "decodelevel": "generalized"
+  },
+  "pages": [
+    {
+      "contents": [
+        "4 0 R"
+      ],
+      "images": [],
+      "label": null,
+      "object": "3 0 R",
+      "outlines": [],
+      "pageposfrom1": 1
+    }
+  ]
+}
+qpdf: image /X1 on page 1: optimizing image reduces size from 2628 to ...
+qpdf: wrote file a.pdf