Return unique_ptr from GetAlphaMask.

core/fxge/fx_dib.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_FXGE_FX_DIB_H_
 #define CORE_FXGE_FX_DIB_H_
 
 #include <memory>
@@ skipping 195 matching lines @@
   }
 
   uint32_t GetPaletteEntry(int index) const;
 
   void SetPaletteEntry(int index, uint32_t color);
   uint32_t GetPaletteArgb(int index) const { return GetPaletteEntry(index); }
   void SetPaletteArgb(int index, uint32_t color) {
     SetPaletteEntry(index, color);
   }
 
-  void CopyPalette(const uint32_t* pSrcPal);
+  // Copies into internally-owned palette.
+  void SetPalette(const uint32_t* pSrcPal);
 
   std::unique_ptr<CFX_DIBitmap> Clone(const FX_RECT* pClip = nullptr) const;
   std::unique_ptr<CFX_DIBitmap> CloneConvert(FXDIB_Format format) const;
 
   std::unique_ptr<CFX_DIBitmap> StretchTo(int dest_width,
                                           int dest_height,
                                           uint32_t flags = 0,
                                           const FX_RECT* pClip = nullptr) const;
   std::unique_ptr<CFX_DIBitmap> TransformTo(
       const CFX_Matrix* pMatrix,
       int& left,
       int& top,
       uint32_t flags = 0,
       const FX_RECT* pClip = nullptr) const;
 
-  CFX_DIBitmap* GetAlphaMask(const FX_RECT* pClip = nullptr) const;
-  bool CopyAlphaMask(const CFX_DIBSource* pAlphaMask,
-                     const FX_RECT* pClip = nullptr);
+  std::unique_ptr<CFX_DIBitmap> CloneAlphaMask(
+      const FX_RECT* pClip = nullptr) const;
+
+  // Copies into internally-owned mask.
+  bool SetAlphaMask(const CFX_DIBSource* pAlphaMask,
+                    const FX_RECT* pClip = nullptr);
 
   CFX_DIBitmap* SwapXY(bool bXFlip,
                        bool bYFlip,
                        const FX_RECT* pClip = nullptr) const;
 
   CFX_DIBitmap* FlipImage(bool bXFlip, bool bYFlip) const;
 
   void GetOverlapRect(int& dest_left,
                       int& dest_top,
                       int& width,
@@ skipping 441 matching lines @@
   int m_Status;
   FX_RECT m_ClipBox;
   uint32_t m_Flags;
   int m_AlphaFlag;
   void* m_pIccTransform;
   bool m_bRgbByteOrder;
   int m_BlendType;
 };
 
 #endif  // CORE_FXGE_FX_DIB_H_