Properly ref-count CFGAS_GEFont with CFX_RetainPtr.

xfa/fde/fde_gedevice.cpp

 // 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
 
 #include "xfa/fde/fde_gedevice.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 87 matching lines @@
   }
   void* handle = nullptr;
   m_pDevice->StartDIBits(pDib, 255, 0, (const CFX_Matrix*)&dib2fxdev, 0,
                          handle);
   while (m_pDevice->ContinueDIBits(handle, nullptr)) {
   }
   m_pDevice->CancelDIBits(handle);
   return !!handle;
 }
 bool CFDE_RenderDevice::DrawString(CFDE_Brush* pBrush,
-                                   CFGAS_GEFont* pFont,
+                                   const CFX_RetainPtr<CFGAS_GEFont>& pFont,
                                    const FXTEXT_CHARPOS* pCharPos,
                                    int32_t iCount,
                                    FX_FLOAT fFontSize,
                                    const CFX_Matrix* pMatrix) {
   ASSERT(pBrush && pFont && pCharPos && iCount > 0);
   CFX_Font* pFxFont = pFont->GetDevFont();
   FX_ARGB argb = pBrush->GetColor();
   if ((pFont->GetFontStyles() & FX_FONTSTYLE_Italic) != 0 &&
       !pFxFont->IsItalic()) {
     FXTEXT_CHARPOS* pCP = (FXTEXT_CHARPOS*)pCharPos;
     FX_FLOAT* pAM;
     for (int32_t i = 0; i < iCount; ++i) {
       static const FX_FLOAT mc = 0.267949f;
       pAM = pCP->m_AdjustMatrix;
       pAM[2] = mc * pAM[0] + pAM[2];
       pAM[3] = mc * pAM[1] + pAM[3];
       pCP++;
     }
   }
   FXTEXT_CHARPOS* pCP = (FXTEXT_CHARPOS*)pCharPos;
-  CFGAS_GEFont* pCurFont = nullptr;
-  CFGAS_GEFont* pSTFont = nullptr;
+  CFX_RetainPtr<CFGAS_GEFont> pCurFont;
+  CFX_RetainPtr<CFGAS_GEFont> pSTFont;
   FXTEXT_CHARPOS* pCurCP = nullptr;
   int32_t iCurCount = 0;
 
 #if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
   uint32_t dwFontStyle = pFont->GetFontStyles();
   CFX_Font FxFont;
   CFX_SubstFont* SubstFxFont = new CFX_SubstFont();
   FxFont.SetSubstFont(std::unique_ptr<CFX_SubstFont>(SubstFxFont));
   SubstFxFont->m_Weight = dwFontStyle & FX_FONTSTYLE_Bold ? 700 : 400;
   SubstFxFont->m_ItalicAngle = dwFontStyle & FX_FONTSTYLE_Italic ? -12 : 0;
@@ skipping 180 matching lines @@
                                  const CFX_Matrix* pMatrix) {
   CFDE_Path* pGePath = (CFDE_Path*)pPath;
   if (!pGePath)
     return false;
   if (!pBrush)
     return false;
   return m_pDevice->DrawPath(&pGePath->m_Path, pMatrix, nullptr,
                              pBrush->GetColor(), 0, FXFILL_WINDING);
 }