Use smart pointers for graphics device classes

core/fpdfapi/fpdf_render/render_int.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_FPDFAPI_FPDF_RENDER_RENDER_INT_H_
 #define CORE_FPDFAPI_FPDF_RENDER_RENDER_INT_H_
 
 #include <map>
 #include <memory>
+#include <vector>
 
 #include "core/fpdfapi/fpdf_page/cpdf_countedobject.h"
 #include "core/fpdfapi/fpdf_page/cpdf_graphicstates.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_clippath.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream_acc.h"
 #include "core/fpdfapi/fpdf_render/include/cpdf_renderoptions.h"
 
 class CCodec_Jbig2Context;
 class CCodec_ScanlineDecoder;
 class CFX_FontCache;
@@ skipping 589 matching lines @@
 
 #define FPDF_HUGE_IMAGE_SIZE 60000000
 class CPDF_DIBTransferFunc : public CFX_FilteredDIB {
  public:
   explicit CPDF_DIBTransferFunc(const CPDF_TransferFunc* pTransferFunc);
   ~CPDF_DIBTransferFunc() override;
 
   // CFX_FilteredDIB
   FXDIB_Format GetDestFormat() override;
   FX_ARGB* GetDestPalette() override;
-  void TranslateScanline(uint8_t* dest_buf,
+  void TranslateScanline(std::vector<uint8_t>* dest_buf,

[Lei Zhang, 2016/07/20 23:09:19]

Can we flip the parameters so the in-param comes before the out-param? (Maybe
another CL)

[Wei Li, 2016/07/21 16:47:07]

Done.

                          const uint8_t* src_buf) const override;
   void TranslateDownSamples(uint8_t* dest_buf,
                             const uint8_t* src_buf,
                             int pixels,
                             int Bpp) const override;
 
   const uint8_t* m_RampR;
   const uint8_t* m_RampG;
   const uint8_t* m_RampB;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_RENDER_RENDER_INT_H_