RefCount CPDF_TransferFunc all the time.

Prefer internal reference counts over ad-hoc schemes.

Change-Id: I8d420e9e9827ac39fdc0bc8146a532caeee10f26
Reviewed-on: https://pdfium-review.googlesource.com/3615
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/core/fpdfapi/render/cpdf_docrenderdata.h b/core/fpdfapi/render/cpdf_docrenderdata.h
index a8f4167a8d..5daee34176 100644
--- a/core/fpdfapi/render/cpdf_docrenderdata.h
+++ b/core/fpdfapi/render/cpdf_docrenderdata.h
@@ -10,11 +10,11 @@
 #include <map>
 
 #include "core/fpdfapi/page/cpdf_countedobject.h"
+#include "core/fpdfapi/render/cpdf_transferfunc.h"
 
 class CPDF_Document;
 class CPDF_Font;
 class CPDF_Object;
-class CPDF_TransferFunc;
 class CPDF_Type3Cache;
 class CPDF_Type3Font;
 
@@ -25,19 +25,19 @@ class CPDF_DocRenderData {
 
   CPDF_Type3Cache* GetCachedType3(CPDF_Type3Font* pFont);
   void ReleaseCachedType3(CPDF_Type3Font* pFont);
-  CPDF_TransferFunc* GetTransferFunc(CPDF_Object* pObj);
-  void ReleaseTransferFunc(CPDF_Object* pObj);
+
+  CFX_RetainPtr<CPDF_TransferFunc> GetTransferFunc(CPDF_Object* pObj);
+  void MaybePurgeTransferFunc(CPDF_Object* pOb);
+
   void Clear(bool bRelease);
 
  private:
   using CPDF_Type3CacheMap =
       std::map<CPDF_Font*, CPDF_CountedObject<CPDF_Type3Cache>*>;
-  using CPDF_TransferFuncMap =
-      std::map<CPDF_Object*, CPDF_CountedObject<CPDF_TransferFunc>*>;
 
   CPDF_Document* m_pPDFDoc;  // Not Owned
   CPDF_Type3CacheMap m_Type3FaceMap;
-  CPDF_TransferFuncMap m_TransferFuncMap;
+  std::map<CPDF_Object*, CFX_RetainPtr<CPDF_TransferFunc>> m_TransferFuncMap;
 };
 
 #endif  // CORE_FPDFAPI_RENDER_CPDF_DOCRENDERDATA_H_