Clean up singleton implementation

core/fxge/ge/fx_ge.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 "core/fxge/include/fx_ge.h"
 
 #include "core/fxge/ge/fx_text_int.h"
 
-static CFX_GEModule* g_pGEModule = nullptr;
+CFX_GEModule* CFX_GEModule::m_pGEModule = nullptr;
 
-CFX_GEModule::CFX_GEModule(const char** pUserFontPaths,
-                           CCodec_ModuleMgr* pCodecModule)
+CFX_GEModule::CFX_GEModule()
     : m_FTLibrary(nullptr),
       m_pFontCache(nullptr),
       m_pFontMgr(new CFX_FontMgr),
-      m_pCodecModule(pCodecModule),
+      m_pCodecModule(nullptr),
       m_pPlatformData(nullptr),
-      m_pUserFontPaths(pUserFontPaths) {
-  InitPlatform();
-  SetTextGamma(2.2f);
-}
+      m_pUserFontPaths(nullptr) {}
 
 CFX_GEModule::~CFX_GEModule() {
   delete m_pFontCache;
   DestroyPlatform();
 }
 
 // static
-void CFX_GEModule::Create(const char** userFontPaths,
-                          CCodec_ModuleMgr* pCodecModule) {
-  ASSERT(!g_pGEModule);
-  g_pGEModule = new CFX_GEModule(userFontPaths, pCodecModule);
-}
-
-// static
 CFX_GEModule* CFX_GEModule::Get() {
-  return g_pGEModule;
+  if (!m_pGEModule)
+    m_pGEModule = new CFX_GEModule();
+  return m_pGEModule;
 }
 
 // static
 void CFX_GEModule::Destroy() {
-  ASSERT(g_pGEModule);
-  delete g_pGEModule;
-  g_pGEModule = nullptr;
+  ASSERT(m_pGEModule);
+  delete m_pGEModule;
+  m_pGEModule = nullptr;
+}
+
+void CFX_GEModule::Init(const char** userFontPaths,
+                        CCodec_ModuleMgr* pCodecModule) {
+  ASSERT(m_pGEModule);
+  m_pCodecModule = pCodecModule;
+  m_pUserFontPaths = userFontPaths;
+  InitPlatform();
+  SetTextGamma(2.2f);
 }
 
 CFX_FontCache* CFX_GEModule::GetFontCache() {
   if (!m_pFontCache)
     m_pFontCache = new CFX_FontCache();
   return m_pFontCache;
 }
 
 void CFX_GEModule::SetTextGamma(FX_FLOAT gammaValue) {
   gammaValue /= 2.2f;
   for (int i = 0; i < 256; ++i) {
     m_GammaValue[i] = static_cast<uint8_t>(
         FXSYS_pow(static_cast<FX_FLOAT>(i) / 255, gammaValue) * 255.0f + 0.5f);
   }
 }
 
 const uint8_t* CFX_GEModule::GetTextGammaTable() const {
   return m_GammaValue;
 }