pdf: Flatten inheritable page properties when copying pages.

Affects pdfclean, pdfmerge, and pdfposter.

1 files changed, 17 insertions, 0 deletions

diff --git a/source/pdf/pdf-page.c b/source/pdf/pdf-page.c
index 9fa96261..8ba02562 100644
--- a/source/pdf/pdf-page.c
+++ b/source/pdf/pdf-page.c
@@ -258,6 +258,23 @@ pdf_lookup_inherited_page_item(fz_context *ctx, pdf_document *doc, pdf_obj *node
 	return val;
 }
 
+static void
+pdf_flatten_inheritable_page_item(fz_context *ctx, pdf_document *doc, pdf_obj *page, pdf_obj *key)
+{
+	pdf_obj *val = pdf_lookup_inherited_page_item(ctx, doc, page, key);
+	if (val)
+		pdf_dict_put(ctx, page, key, val);
+}
+
+void
+pdf_flatten_inheritable_page_items(fz_context *ctx, pdf_document *doc, pdf_obj *page)
+{
+	pdf_flatten_inheritable_page_item(ctx, doc, page, PDF_NAME_MediaBox);
+	pdf_flatten_inheritable_page_item(ctx, doc, page, PDF_NAME_CropBox);
+	pdf_flatten_inheritable_page_item(ctx, doc, page, PDF_NAME_Rotate);
+	pdf_flatten_inheritable_page_item(ctx, doc, page, PDF_NAME_Resources);
+}
+
 /* We need to know whether to install a page-level transparency group */
 
 static int pdf_resources_use_blending(fz_context *ctx, pdf_document *doc, pdf_obj *rdb);