pdfviewer: track what objects have been used during rendering. It will be the base of reporting unu…

experimental/PdfViewer/SkPdfConfig.h

Index: experimental/PdfViewer/SkPdfConfig.h
===================================================================
--- experimental/PdfViewer/SkPdfConfig.h	(revision 11092)
+++ experimental/PdfViewer/SkPdfConfig.h	(working copy)
@@ -8,6 +8,8 @@
 #ifndef SkPdfConfig_DEFINED
 #define SkPdfConfig_DEFINED
 
+#define PDF_TRACK_OBJECT_USAGE
+//#define PDF_TRACK_STREAM_OFFSETS
 //#define PDF_TRACE
 //#define PDF_TRACE_READ_TOKEN
 //#define PDF_TRACE_DRAWTEXT
@@ -16,4 +18,19 @@
 //#define PDF_DEBUG_NO_PAGE_CLIPING
 //#define PDF_DEBUG_3X
 
+
+// TODO(edisonn): pass a flag to say how it was used? e.g. asked the type? Obtained value?
+// Implement it when it will be needed the first time to fix some bug.
+#ifdef PDF_TRACK_OBJECT_USAGE
+#define SkPdfMarkObjectUsed() fUsed = true
+#else
+#define SkPdfMarkObjectUsed()
+#endif   // PDF_TRACK_OBJECT_USAGE
+
+#ifdef PDF_TRACK_OBJECT_USAGE
+#define SkPdfMarkObjectUnused() fUsed = false
+#else
+#define SkPdfMarkObjectUnused()
+#endif   // PDF_TRACK_OBJECT_USAGE
+
 #endif  // SkPdfConfig_DEFINED