SkPDF: Optionally output PDF/A-2b archive format.

src/pdf/SkPDFMetadata.h

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkPDFMetadata_DEFINED
+#define SkPDFMetadata_DEFINED
+
+#include "SkDocument.h"
+#include "SkTime.h"
+
+class SkPDFObject;
+
+struct SkPDFMetadata {
+    SkTArray<SkDocument::Attribute> fInfo;
+    SkAutoTDelete<const SkTime::DateTime> fCreation;
+    SkAutoTDelete<const SkTime::DateTime> fModified;
+
+    SkPDFObject* createDocumentInformationDict() const;
+
+    struct UUID { uint8_t fData[16]; };
+    UUID uuid() const;

[tomhudson, 2015/10/09 15:31:37]

Would it make sense to name this generateUUID() or something?

You're setting uuid = foo.uuid() and then passing uuid to functions and it's all
very dense; I've seen that before but is it really Skia style?

+    static SkPDFObject* CreatePdfId(const UUID& doc, const UUID& instance);
+
+    #ifdef SK_PDF_GENERATE_PDFA
+    SkPDFObject* createXMPObject(const UUID& doc, const UUID& instance) const;
+    #endif  // SK_PDF_GENERATE_PDFA
+};
+
+#endif  // SkPDFMetadata_DEFINED