Merge to XFA: Split up JBig2_GeneralDecoder.cpp.

TBR=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1359233002 .

(cherry picked from commit 630a28442364f03c1d3d9b48873da42755e1fddf)

Review URL: https://codereview.chromium.org/1364083004 .

22 files changed, 3829 insertions, 3545 deletions

diff --git a/core/src/fxcodec/jbig2/JBig2_ArithDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_ArithDecoder.cpp
new file mode 100644
index 0000000000..34c79f9fa3
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_ArithDecoder.cpp
@@ -0,0 +1,166 @@
+// 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 "JBig2_ArithDecoder.h"
+
+#include "../../../include/fxcrt/fx_basic.h"
+#include "JBig2_BitStream.h"
+#include "JBig2_Define.h"
+
+namespace {
+
+struct JBig2ArithQe {
+  unsigned int Qe;
+  unsigned int NMPS;
+  unsigned int NLPS;
+  unsigned int nSwitch;
+};
+
+const JBig2ArithQe kQeTable[] = {
+    // Stupid hack to keep clang-format from reformatting this badly.
+    {0x5601, 1, 1, 1},
+    {0x3401, 2, 6, 0},
+    {0x1801, 3, 9, 0},
+    {0x0AC1, 4, 12, 0},
+    {0x0521, 5, 29, 0},
+    {0x0221, 38, 33, 0},
+    {0x5601, 7, 6, 1},
+    {0x5401, 8, 14, 0},
+    {0x4801, 9, 14, 0},
+    {0x3801, 10, 14, 0},
+    {0x3001, 11, 17, 0},
+    {0x2401, 12, 18, 0},
+    {0x1C01, 13, 20, 0},
+    {0x1601, 29, 21, 0},
+    {0x5601, 15, 14, 1},
+    {0x5401, 16, 14, 0},
+    {0x5101, 17, 15, 0},
+    {0x4801, 18, 16, 0},
+    {0x3801, 19, 17, 0},
+    {0x3401, 20, 18, 0},
+    {0x3001, 21, 19, 0},
+    {0x2801, 22, 19, 0},
+    {0x2401, 23, 20, 0},
+    {0x2201, 24, 21, 0},
+    {0x1C01, 25, 22, 0},
+    {0x1801, 26, 23, 0},
+    {0x1601, 27, 24, 0},
+    {0x1401, 28, 25, 0},
+    {0x1201, 29, 26, 0},
+    {0x1101, 30, 27, 0},
+    {0x0AC1, 31, 28, 0},
+    {0x09C1, 32, 29, 0},
+    {0x08A1, 33, 30, 0},
+    {0x0521, 34, 31, 0},
+    {0x0441, 35, 32, 0},
+    {0x02A1, 36, 33, 0},
+    {0x0221, 37, 34, 0},
+    {0x0141, 38, 35, 0},
+    {0x0111, 39, 36, 0},
+    {0x0085, 40, 37, 0},
+    {0x0049, 41, 38, 0},
+    {0x0025, 42, 39, 0},
+    {0x0015, 43, 40, 0},
+    {0x0009, 44, 41, 0},
+    {0x0005, 45, 42, 0},
+    {0x0001, 45, 43, 0},
+    {0x5601, 46, 46, 0}};
+
+}  // namespace
+
+CJBig2_ArithDecoder::CJBig2_ArithDecoder(CJBig2_BitStream* pStream) {
+  m_pStream = pStream;
+  INITDEC();
+}
+
+CJBig2_ArithDecoder::~CJBig2_ArithDecoder() {
+}
+
+int CJBig2_ArithDecoder::DECODE(JBig2ArithCtx* pCX) {
+  if (!pCX || pCX->I >= FX_ArraySize(kQeTable)) {
+    return 0;
+  }
+
+  int D;
+  const JBig2ArithQe* qe = &kQeTable[pCX->I];
+  A = A - qe->Qe;
+  if ((C >> 16) < A) {
+    if (A & 0x8000) {
+      D = pCX->MPS;
+    } else {
+      if (A < qe->Qe) {
+        D = 1 - pCX->MPS;
+        if (qe->nSwitch == 1) {
+          pCX->MPS = 1 - pCX->MPS;
+        }
+        pCX->I = qe->NLPS;
+      } else {
+        D = pCX->MPS;
+        pCX->I = qe->NMPS;
+      }
+      do {
+        if (CT == 0) {
+          BYTEIN();
+        }
+        A <<= 1;
+        C <<= 1;
+        CT--;
+      } while ((A & 0x8000) == 0);
+    }
+  } else {
+    C -= A << 16;
+    if (A < qe->Qe) {
+      A = qe->Qe;
+      D = pCX->MPS;
+      pCX->I = qe->NMPS;
+    } else {
+      A = qe->Qe;
+      D = 1 - pCX->MPS;
+      if (qe->nSwitch == 1) {
+        pCX->MPS = 1 - pCX->MPS;
+      }
+      pCX->I = qe->NLPS;
+    }
+    do {
+      if (CT == 0) {
+        BYTEIN();
+      }
+      A <<= 1;
+      C <<= 1;
+      CT--;
+    } while ((A & 0x8000) == 0);
+  }
+  return D;
+}
+
+void CJBig2_ArithDecoder::INITDEC() {
+  B = m_pStream->getCurByte_arith();
+  C = (B ^ 0xff) << 16;
+  BYTEIN();
+  C = C << 7;
+  CT = CT - 7;
+  A = 0x8000;
+}
+
+void CJBig2_ArithDecoder::BYTEIN() {
+  unsigned char B1;
+  if (B == 0xff) {
+    B1 = m_pStream->getNextByte_arith();
+    if (B1 > 0x8f) {
+      CT = 8;
+    } else {
+      m_pStream->incByteIdx();
+      B = B1;
+      C = C + 0xfe00 - (B << 9);
+      CT = 7;
+    }
+  } else {
+    m_pStream->incByteIdx();
+    B = m_pStream->getCurByte_arith();
+    C = C + 0xff00 - (B << 8);
+    CT = 8;
+  }
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_ArithDecoder.h b/core/src/fxcodec/jbig2/JBig2_ArithDecoder.h
index 7acfe9cd36..02c81b34c0 100644
--- a/core/src/fxcodec/jbig2/JBig2_ArithDecoder.h
+++ b/core/src/fxcodec/jbig2/JBig2_ArithDecoder.h
@@ -4,11 +4,10 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _JBIG2_ARITHMETIC_DECODER_H_
-#define _JBIG2_ARITHMETIC_DECODER_H_
-#include "JBig2_Define.h"
-#include "JBig2_BitStream.h"
-#include "JBig2_ArithQe.h"
+#ifndef CORE_SRC_FXCODEC_JBIG2_JBIG2_ARITHDECODER_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_ARITHDECODER_H_
+
+class CJBig2_BitStream;
 
 struct JBig2ArithCtx {
   unsigned int MPS;
@@ -34,93 +33,4 @@ class CJBig2_ArithDecoder {
   CJBig2_BitStream* m_pStream;
 };
 
-inline CJBig2_ArithDecoder::CJBig2_ArithDecoder(CJBig2_BitStream* pStream) {
-  m_pStream = pStream;
-  INITDEC();
-}
-inline CJBig2_ArithDecoder::~CJBig2_ArithDecoder() {}
-inline void CJBig2_ArithDecoder::INITDEC() {
-  B = m_pStream->getCurByte_arith();
-  C = (B ^ 0xff) << 16;
-  ;
-  BYTEIN();
-  C = C << 7;
-  CT = CT - 7;
-  A = 0x8000;
-}
-inline void CJBig2_ArithDecoder::BYTEIN() {
-  unsigned char B1;
-  if (B == 0xff) {
-    B1 = m_pStream->getNextByte_arith();
-    if (B1 > 0x8f) {
-      CT = 8;
-    } else {
-      m_pStream->incByteIdx();
-      B = B1;
-      C = C + 0xfe00 - (B << 9);
-      CT = 7;
-    }
-  } else {
-    m_pStream->incByteIdx();
-    B = m_pStream->getCurByte_arith();
-    C = C + 0xff00 - (B << 8);
-    CT = 8;
-  }
-}
-inline int CJBig2_ArithDecoder::DECODE(JBig2ArithCtx* pCX) {
-  if (!pCX || pCX->I >= JBIG2_QE_NUM) {
-    return 0;
-  }
-
-  int D;
-  const JBig2ArithQe* qe = &QeTable[pCX->I];
-  A = A - qe->Qe;
-  if ((C >> 16) < A) {
-    if (A & 0x8000) {
-      D = pCX->MPS;
-    } else {
-      if (A < qe->Qe) {
-        D = 1 - pCX->MPS;
-        if (qe->nSwitch == 1) {
-          pCX->MPS = 1 - pCX->MPS;
-        }
-        pCX->I = qe->NLPS;
-      } else {
-        D = pCX->MPS;
-        pCX->I = qe->NMPS;
-      }
-      do {
-        if (CT == 0) {
-          BYTEIN();
-        }
-        A <<= 1;
-        C <<= 1;
-        CT--;
-      } while ((A & 0x8000) == 0);
-    }
-  } else {
-    C -= A << 16;
-    if (A < qe->Qe) {
-      A = qe->Qe;
-      D = pCX->MPS;
-      pCX->I = qe->NMPS;
-    } else {
-      A = qe->Qe;
-      D = 1 - pCX->MPS;
-      if (qe->nSwitch == 1) {
-        pCX->MPS = 1 - pCX->MPS;
-      }
-      pCX->I = qe->NLPS;
-    }
-    do {
-      if (CT == 0) {
-        BYTEIN();
-      }
-      A <<= 1;
-      C <<= 1;
-      CT--;
-    } while ((A & 0x8000) == 0);
-  }
-  return D;
-}
-#endif
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_ARITHDECODER_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
index c8baa158e9..b194faf4ee 100644
--- a/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp
@@ -7,6 +7,7 @@
 #include "JBig2_ArithIntDecoder.h"
 
 #include "../../../include/fxcrt/fx_memory.h"
+#include "JBig2_Define.h"
 
 CJBig2_ArithIntDecoder::CJBig2_ArithIntDecoder() {
   IAx = FX_Alloc(JBig2ArithCtx, 512);
diff --git a/core/src/fxcodec/jbig2/JBig2_ArithQe.h b/core/src/fxcodec/jbig2/JBig2_ArithQe.h
deleted file mode 100644
index d4eabec757..0000000000
--- a/core/src/fxcodec/jbig2/JBig2_ArithQe.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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 _JBIG2_ARITH_QE_H_
-#define _JBIG2_ARITH_QE_H_
-typedef struct {
-  unsigned int Qe;
-  unsigned int NMPS;
-  unsigned int NLPS;
-  unsigned int nSwitch;
-} JBig2ArithQe;
-extern const JBig2ArithQe QeTable[];
-extern const unsigned int JBIG2_QE_NUM;
-#endif
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.cpp b/core/src/fxcodec/jbig2/JBig2_Context.cpp
index b70054171d..c004c87503 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Context.cpp
@@ -4,9 +4,17 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#include <list>
 #include "JBig2_Context.h"
 
+#include <list>
+
+#include "JBig2_GrdProc.h"
+#include "JBig2_GrrdProc.h"
+#include "JBig2_HtrdProc.h"
+#include "JBig2_PddProc.h"
+#include "JBig2_SddProc.h"
+#include "JBig2_TrdProc.h"
+
 // Implement a very small least recently used (LRU) cache. It is very
 // common for a JBIG2 dictionary to span multiple pages in a PDF file,
 // and we do not want to decode the same dictionary over and over
@@ -14,7 +22,7 @@
 // list keeps track of the freshness of entries, with freshest ones
 // at the front. Even a tiny cache size like 2 makes a dramatic
 // difference for typical JBIG2 documents.
-const int kSymbolDictCacheMaxSize = 2;
+static const int kSymbolDictCacheMaxSize = 2;
 
 CJBig2_Context* CJBig2_Context::CreateContext(
     const uint8_t* pGlobalData,
@@ -497,13 +505,18 @@ int32_t CJBig2_Context::parseSymbolDict(CJBig2_Segment* pSegment,
   FX_DWORD dwTemp;
   FX_WORD wFlags;
   uint8_t cSDHUFFDH, cSDHUFFDW, cSDHUFFBMSIZE, cSDHUFFAGGINST;
-  CJBig2_HuffmanTable *Table_B1 = NULL, *Table_B2 = NULL, *Table_B3 = NULL,
-                      *Table_B4 = NULL, *Table_B5 = NULL;
+  CJBig2_HuffmanTable* Table_B1 = nullptr;
+  CJBig2_HuffmanTable* Table_B2 = nullptr;
+  CJBig2_HuffmanTable* Table_B3 = nullptr;
+  CJBig2_HuffmanTable* Table_B4 = nullptr;
+  CJBig2_HuffmanTable* Table_B5 = nullptr;
   int32_t i, nIndex, nRet;
-  CJBig2_Segment *pSeg = NULL, *pLRSeg = NULL;
+  CJBig2_Segment* pSeg = nullptr;
+  CJBig2_Segment* pLRSeg = nullptr;
   FX_BOOL bUsed;
-  CJBig2_Image** SDINSYMS = NULL;
-  JBig2ArithCtx *gbContext = NULL, *grContext = NULL;
+  CJBig2_Image** SDINSYMS = nullptr;
+  JBig2ArithCtx* gbContext = nullptr;
+  JBig2ArithCtx* grContext = nullptr;
   CJBig2_ArithDecoder* pArithDecoder;
   CJBig2_SDDProc* pSymbolDictDecoder = new CJBig2_SDDProc();
   const uint8_t* key = pSegment->m_pData;
@@ -767,15 +780,22 @@ int32_t CJBig2_Context::parseTextRegion(CJBig2_Segment* pSegment) {
   int32_t i, nIndex, nRet;
   JBig2RegionInfo ri;
   CJBig2_Segment* pSeg;
-  CJBig2_Image** SBSYMS = NULL;
-  JBig2HuffmanCode* SBSYMCODES = NULL;
+  CJBig2_Image** SBSYMS = nullptr;
+  JBig2HuffmanCode* SBSYMCODES = nullptr;
   uint8_t cSBHUFFFS, cSBHUFFDS, cSBHUFFDT, cSBHUFFRDW, cSBHUFFRDH, cSBHUFFRDX,
       cSBHUFFRDY, cSBHUFFRSIZE;
-  CJBig2_HuffmanTable *Table_B1 = NULL, *Table_B6 = NULL, *Table_B7 = NULL,
-                      *Table_B8 = NULL, *Table_B9 = NULL, *Table_B10 = NULL,
-                      *Table_B11 = NULL, *Table_B12 = NULL, *Table_B13 = NULL,
-                      *Table_B14 = NULL, *Table_B15 = NULL;
-  JBig2ArithCtx* grContext = NULL;
+  CJBig2_HuffmanTable* Table_B1 = nullptr;
+  CJBig2_HuffmanTable* Table_B6 = nullptr;
+  CJBig2_HuffmanTable* Table_B7 = nullptr;
+  CJBig2_HuffmanTable* Table_B8 = nullptr;
+  CJBig2_HuffmanTable* Table_B9 = nullptr;
+  CJBig2_HuffmanTable* Table_B10 = nullptr;
+  CJBig2_HuffmanTable* Table_B11 = nullptr;
+  CJBig2_HuffmanTable* Table_B12 = nullptr;
+  CJBig2_HuffmanTable* Table_B13 = nullptr;
+  CJBig2_HuffmanTable* Table_B14 = nullptr;
+  CJBig2_HuffmanTable* Table_B15 = nullptr;
+  JBig2ArithCtx* grContext = nullptr;
   CJBig2_ArithDecoder* pArithDecoder;
   CJBig2_TRDProc* pTRD = new CJBig2_TRDProc();
   if ((parseRegionInfo(&ri) != JBIG2_SUCCESS) ||
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.h b/core/src/fxcodec/jbig2/JBig2_Context.h
index 1af6b9444c..48bc794205 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.h
+++ b/core/src/fxcodec/jbig2/JBig2_Context.h
@@ -4,19 +4,21 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _JBIG2_CONTEXT_H_
-#define _JBIG2_CONTEXT_H_
+#ifndef CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_
 
 #include <list>
 #include <utility>
 
 #include "../../../../third_party/base/nonstd_unique_ptr.h"
 #include "../../../include/fxcodec/fx_codec_def.h"
-#include "JBig2_GeneralDecoder.h"
 #include "JBig2_List.h"
 #include "JBig2_Page.h"
 #include "JBig2_Segment.h"
 
+class CJBig2_GRDProc;
+class IFX_Pause;
+
 using CJBig2_CachePair = std::pair<const uint8_t*, CJBig2_SymbolDict*>;
 
 #define JBIG2_SUCCESS 0
@@ -141,4 +143,5 @@ class CJBig2_Context {
   JBig2RegionInfo m_ri;
   std::list<CJBig2_CachePair>* m_pSymbolDictCache;
 };
-#endif
+
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
deleted file mode 100644
index d93d3e0e03..0000000000
--- a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
+++ /dev/null
@@ -1,3130 +0,0 @@
-// 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 "JBig2_GeneralDecoder.h"
-
-#include "../../../../third_party/base/nonstd_unique_ptr.h"
-#include "JBig2_ArithDecoder.h"
-#include "JBig2_ArithIntDecoder.h"
-#include "JBig2_HuffmanDecoder.h"
-#include "JBig2_HuffmanTable.h"
-#include "JBig2_PatternDict.h"
-
-extern const JBig2ArithQe QeTable[] = {
-    {0x5601, 1, 1, 1},   {0x3401, 2, 6, 0},   {0x1801, 3, 9, 0},
-    {0x0AC1, 4, 12, 0},  {0x0521, 5, 29, 0},  {0x0221, 38, 33, 0},
-    {0x5601, 7, 6, 1},   {0x5401, 8, 14, 0},  {0x4801, 9, 14, 0},
-    {0x3801, 10, 14, 0}, {0x3001, 11, 17, 0}, {0x2401, 12, 18, 0},
-    {0x1C01, 13, 20, 0}, {0x1601, 29, 21, 0}, {0x5601, 15, 14, 1},
-    {0x5401, 16, 14, 0}, {0x5101, 17, 15, 0}, {0x4801, 18, 16, 0},
-    {0x3801, 19, 17, 0}, {0x3401, 20, 18, 0}, {0x3001, 21, 19, 0},
-    {0x2801, 22, 19, 0}, {0x2401, 23, 20, 0}, {0x2201, 24, 21, 0},
-    {0x1C01, 25, 22, 0}, {0x1801, 26, 23, 0}, {0x1601, 27, 24, 0},
-    {0x1401, 28, 25, 0}, {0x1201, 29, 26, 0}, {0x1101, 30, 27, 0},
-    {0x0AC1, 31, 28, 0}, {0x09C1, 32, 29, 0}, {0x08A1, 33, 30, 0},
-    {0x0521, 34, 31, 0}, {0x0441, 35, 32, 0}, {0x02A1, 36, 33, 0},
-    {0x0221, 37, 34, 0}, {0x0141, 38, 35, 0}, {0x0111, 39, 36, 0},
-    {0x0085, 40, 37, 0}, {0x0049, 41, 38, 0}, {0x0025, 42, 39, 0},
-    {0x0015, 43, 40, 0}, {0x0009, 44, 41, 0}, {0x0005, 45, 42, 0},
-    {0x0001, 45, 43, 0}, {0x5601, 46, 46, 0}};
-
-extern const unsigned int JBIG2_QE_NUM = FX_ArraySize(QeTable);
-
-bool CJBig2_GRDProc::UseTemplate0Opt3() const {
-  return (GBAT[0] == 3) && (GBAT[1] == -1) && (GBAT[2] == -3) &&
-         (GBAT[3] == -1) && (GBAT[4] == 2) && (GBAT[5] == -2) &&
-         (GBAT[6] == -2) && (GBAT[7] == -2);
-}
-
-bool CJBig2_GRDProc::UseTemplate1Opt3() const {
-  return (GBAT[0] == 3) && (GBAT[1] == -1);
-}
-
-bool CJBig2_GRDProc::UseTemplate23Opt3() const {
-  return (GBAT[0] == 2) && (GBAT[1] == -1);
-}
-
-CJBig2_Image* CJBig2_GRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                                           JBig2ArithCtx* gbContext) {
-  if (GBW == 0 || GBH == 0)
-    return new CJBig2_Image(GBW, GBH);
-
-  if (GBTEMPLATE == 0) {
-    if (UseTemplate0Opt3())
-      return decode_Arith_Template0_opt3(pArithDecoder, gbContext);
-    return decode_Arith_Template0_unopt(pArithDecoder, gbContext);
-  } else if (GBTEMPLATE == 1) {
-    if (UseTemplate1Opt3())
-      return decode_Arith_Template1_opt3(pArithDecoder, gbContext);
-    return decode_Arith_Template1_unopt(pArithDecoder, gbContext);
-  } else if (GBTEMPLATE == 2) {
-    if (UseTemplate23Opt3())
-      return decode_Arith_Template2_opt3(pArithDecoder, gbContext);
-    return decode_Arith_Template2_unopt(pArithDecoder, gbContext);
-  } else {
-    if (UseTemplate23Opt3())
-      return decode_Arith_Template3_opt3(pArithDecoder, gbContext);
-    return decode_Arith_Template3_unopt(pArithDecoder, gbContext);
-  }
-}
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template0_opt3(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2;
-  uint8_t *pLine, *pLine1, *pLine2, cVal;
-  int32_t nStride, nStride2, k;
-  int32_t nLineBytes, nBitsLeft, cc;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
-  if (!GBREG->m_pData)
-    return nullptr;
-
-  pLine = GBREG->m_pData;
-  nStride = GBREG->m_nStride;
-  nStride2 = nStride << 1;
-  nLineBytes = ((GBW + 7) >> 3) - 1;
-  nBitsLeft = GBW - (nLineBytes << 3);
-  FX_DWORD height = GBH & 0x7fffffff;
-  for (FX_DWORD h = 0; h < height; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x9b25]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      GBREG->copyLine(h, h - 1);
-    } else {
-      if (h > 1) {
-        pLine1 = pLine - nStride2;
-        pLine2 = pLine - nStride;
-        line1 = (*pLine1++) << 6;
-        line2 = *pLine2++;
-        CONTEXT = ((line1 & 0xf800) | (line2 & 0x07f0));
-        for (cc = 0; cc < nLineBytes; cc++) {
-          line1 = (line1 << 8) | ((*pLine1++) << 6);
-          line2 = (line2 << 8) | (*pLine2++);
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
-                       ((line1 >> k) & 0x0800) | ((line2 >> k) & 0x0010));
-          }
-          pLine[cc] = cVal;
-        }
-        line1 <<= 8;
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT =
-              (((CONTEXT & 0x7bf7) << 1) | bVal |
-               ((line1 >> (7 - k)) & 0x0800) | ((line2 >> (7 - k)) & 0x0010));
-        }
-        pLine[nLineBytes] = cVal;
-      } else {
-        pLine2 = pLine - nStride;
-        line2 = (h & 1) ? (*pLine2++) : 0;
-        CONTEXT = (line2 & 0x07f0);
-        for (cc = 0; cc < nLineBytes; cc++) {
-          if (h & 1) {
-            line2 = (line2 << 8) | (*pLine2++);
-          }
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT =
-                (((CONTEXT & 0x7bf7) << 1) | bVal | ((line2 >> k) & 0x0010));
-          }
-          pLine[cc] = cVal;
-        }
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
-                     (((line2 >> (7 - k))) & 0x0010));
-        }
-        pLine[nLineBytes] = cVal;
-      }
-    }
-    pLine += nStride;
-  }
-  return GBREG.release();
-}
-
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template0_unopt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2, line3;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
-  GBREG->fill(0);
-  for (FX_DWORD h = 0; h < GBH; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x9b25]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      GBREG->copyLine(h, h - 1);
-    } else {
-      line1 = GBREG->getPixel(1, h - 2);
-      line1 |= GBREG->getPixel(0, h - 2) << 1;
-      line2 = GBREG->getPixel(2, h - 1);
-      line2 |= GBREG->getPixel(1, h - 1) << 1;
-      line2 |= GBREG->getPixel(0, h - 1) << 2;
-      line3 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, h)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line3;
-          CONTEXT |= GBREG->getPixel(w + GBAT[0], h + GBAT[1]) << 4;
-          CONTEXT |= line2 << 5;
-          CONTEXT |= GBREG->getPixel(w + GBAT[2], h + GBAT[3]) << 10;
-          CONTEXT |= GBREG->getPixel(w + GBAT[4], h + GBAT[5]) << 11;
-          CONTEXT |= line1 << 12;
-          CONTEXT |= GBREG->getPixel(w + GBAT[6], h + GBAT[7]) << 15;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          GBREG->setPixel(w, h, bVal);
-        }
-        line1 = ((line1 << 1) | GBREG->getPixel(w + 2, h - 2)) & 0x07;
-        line2 = ((line2 << 1) | GBREG->getPixel(w + 3, h - 1)) & 0x1f;
-        line3 = ((line3 << 1) | bVal) & 0x0f;
-      }
-    }
-  }
-  return GBREG.release();
-}
-
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template1_opt3(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2;
-  uint8_t *pLine, *pLine1, *pLine2, cVal;
-  int32_t nStride, nStride2, k;
-  int32_t nLineBytes, nBitsLeft, cc;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
-  if (!GBREG->m_pData)
-    return nullptr;
-
-  pLine = GBREG->m_pData;
-  nStride = GBREG->m_nStride;
-  nStride2 = nStride << 1;
-  nLineBytes = ((GBW + 7) >> 3) - 1;
-  nBitsLeft = GBW - (nLineBytes << 3);
-  for (FX_DWORD h = 0; h < GBH; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x0795]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      GBREG->copyLine(h, h - 1);
-    } else {
-      if (h > 1) {
-        pLine1 = pLine - nStride2;
-        pLine2 = pLine - nStride;
-        line1 = (*pLine1++) << 4;
-        line2 = *pLine2++;
-        CONTEXT = (line1 & 0x1e00) | ((line2 >> 1) & 0x01f8);
-        for (cc = 0; cc < nLineBytes; cc++) {
-          line1 = (line1 << 8) | ((*pLine1++) << 4);
-          line2 = (line2 << 8) | (*pLine2++);
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
-                      ((line1 >> k) & 0x0200) | ((line2 >> (k + 1)) & 0x0008);
-          }
-          pLine[cc] = cVal;
-        }
-        line1 <<= 8;
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
-                    ((line1 >> (7 - k)) & 0x0200) |
-                    ((line2 >> (8 - k)) & 0x0008);
-        }
-        pLine[nLineBytes] = cVal;
-      } else {
-        pLine2 = pLine - nStride;
-        line2 = (h & 1) ? (*pLine2++) : 0;
-        CONTEXT = (line2 >> 1) & 0x01f8;
-        for (cc = 0; cc < nLineBytes; cc++) {
-          if (h & 1) {
-            line2 = (line2 << 8) | (*pLine2++);
-          }
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
-                      ((line2 >> (k + 1)) & 0x0008);
-          }
-          pLine[cc] = cVal;
-        }
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT =
-              ((CONTEXT & 0x0efb) << 1) | bVal | ((line2 >> (8 - k)) & 0x0008);
-        }
-        pLine[nLineBytes] = cVal;
-      }
-    }
-    pLine += nStride;
-  }
-  return GBREG.release();
-}
-
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template1_unopt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2, line3;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
-  GBREG->fill(0);
-  for (FX_DWORD h = 0; h < GBH; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x0795]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      GBREG->copyLine(h, h - 1);
-    } else {
-      line1 = GBREG->getPixel(2, h - 2);
-      line1 |= GBREG->getPixel(1, h - 2) << 1;
-      line1 |= GBREG->getPixel(0, h - 2) << 2;
-      line2 = GBREG->getPixel(2, h - 1);
-      line2 |= GBREG->getPixel(1, h - 1) << 1;
-      line2 |= GBREG->getPixel(0, h - 1) << 2;
-      line3 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, h)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line3;
-          CONTEXT |= GBREG->getPixel(w + GBAT[0], h + GBAT[1]) << 3;
-          CONTEXT |= line2 << 4;
-          CONTEXT |= line1 << 9;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          GBREG->setPixel(w, h, bVal);
-        }
-        line1 = ((line1 << 1) | GBREG->getPixel(w + 3, h - 2)) & 0x0f;
-        line2 = ((line2 << 1) | GBREG->getPixel(w + 3, h - 1)) & 0x1f;
-        line3 = ((line3 << 1) | bVal) & 0x07;
-      }
-    }
-  }
-  return GBREG.release();
-}
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template2_opt3(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2;
-  uint8_t *pLine, *pLine1, *pLine2, cVal;
-  int32_t nStride, nStride2, k;
-  int32_t nLineBytes, nBitsLeft, cc;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
-  if (!GBREG->m_pData)
-    return nullptr;
-
-  pLine = GBREG->m_pData;
-  nStride = GBREG->m_nStride;
-  nStride2 = nStride << 1;
-  nLineBytes = ((GBW + 7) >> 3) - 1;
-  nBitsLeft = GBW - (nLineBytes << 3);
-  for (FX_DWORD h = 0; h < GBH; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x00e5]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      GBREG->copyLine(h, h - 1);
-    } else {
-      if (h > 1) {
-        pLine1 = pLine - nStride2;
-        pLine2 = pLine - nStride;
-        line1 = (*pLine1++) << 1;
-        line2 = *pLine2++;
-        CONTEXT = (line1 & 0x0380) | ((line2 >> 3) & 0x007c);
-        for (cc = 0; cc < nLineBytes; cc++) {
-          line1 = (line1 << 8) | ((*pLine1++) << 1);
-          line2 = (line2 << 8) | (*pLine2++);
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                      ((line1 >> k) & 0x0080) | ((line2 >> (k + 3)) & 0x0004);
-          }
-          pLine[cc] = cVal;
-        }
-        line1 <<= 8;
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                    ((line1 >> (7 - k)) & 0x0080) |
-                    ((line2 >> (10 - k)) & 0x0004);
-        }
-        pLine[nLineBytes] = cVal;
-      } else {
-        pLine2 = pLine - nStride;
-        line2 = (h & 1) ? (*pLine2++) : 0;
-        CONTEXT = (line2 >> 3) & 0x007c;
-        for (cc = 0; cc < nLineBytes; cc++) {
-          if (h & 1) {
-            line2 = (line2 << 8) | (*pLine2++);
-          }
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                      ((line2 >> (k + 3)) & 0x0004);
-          }
-          pLine[cc] = cVal;
-        }
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                    (((line2 >> (10 - k))) & 0x0004);
-        }
-        pLine[nLineBytes] = cVal;
-      }
-    }
-    pLine += nStride;
-  }
-  return GBREG.release();
-}
-
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template2_unopt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2, line3;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
-  GBREG->fill(0);
-  for (FX_DWORD h = 0; h < GBH; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x00e5]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      GBREG->copyLine(h, h - 1);
-    } else {
-      line1 = GBREG->getPixel(1, h - 2);
-      line1 |= GBREG->getPixel(0, h - 2) << 1;
-      line2 = GBREG->getPixel(1, h - 1);
-      line2 |= GBREG->getPixel(0, h - 1) << 1;
-      line3 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, h)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line3;
-          CONTEXT |= GBREG->getPixel(w + GBAT[0], h + GBAT[1]) << 2;
-          CONTEXT |= line2 << 3;
-          CONTEXT |= line1 << 7;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          GBREG->setPixel(w, h, bVal);
-        }
-        line1 = ((line1 << 1) | GBREG->getPixel(w + 2, h - 2)) & 0x07;
-        line2 = ((line2 << 1) | GBREG->getPixel(w + 2, h - 1)) & 0x0f;
-        line3 = ((line3 << 1) | bVal) & 0x03;
-      }
-    }
-  }
-  return GBREG.release();
-}
-
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template3_opt3(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1;
-  uint8_t *pLine, *pLine1, cVal;
-  int32_t nStride, k;
-  int32_t nLineBytes, nBitsLeft, cc;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
-  if (!GBREG->m_pData)
-    return nullptr;
-
-  pLine = GBREG->m_pData;
-  nStride = GBREG->m_nStride;
-  nLineBytes = ((GBW + 7) >> 3) - 1;
-  nBitsLeft = GBW - (nLineBytes << 3);
-  for (FX_DWORD h = 0; h < GBH; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      GBREG->copyLine(h, h - 1);
-    } else {
-      if (h > 0) {
-        pLine1 = pLine - nStride;
-        line1 = *pLine1++;
-        CONTEXT = (line1 >> 1) & 0x03f0;
-        for (cc = 0; cc < nLineBytes; cc++) {
-          line1 = (line1 << 8) | (*pLine1++);
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal |
-                      ((line1 >> (k + 1)) & 0x0010);
-          }
-          pLine[cc] = cVal;
-        }
-        line1 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT =
-              ((CONTEXT & 0x01f7) << 1) | bVal | ((line1 >> (8 - k)) & 0x0010);
-        }
-        pLine[nLineBytes] = cVal;
-      } else {
-        CONTEXT = 0;
-        for (cc = 0; cc < nLineBytes; cc++) {
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal;
-          }
-          pLine[cc] = cVal;
-        }
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal;
-        }
-        pLine[nLineBytes] = cVal;
-      }
-    }
-    pLine += nStride;
-  }
-  return GBREG.release();
-}
-
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template3_unopt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
-  GBREG->fill(0);
-  for (FX_DWORD h = 0; h < GBH; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      GBREG->copyLine(h, h - 1);
-    } else {
-      line1 = GBREG->getPixel(1, h - 1);
-      line1 |= GBREG->getPixel(0, h - 1) << 1;
-      line2 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, h)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line2;
-          CONTEXT |= GBREG->getPixel(w + GBAT[0], h + GBAT[1]) << 4;
-          CONTEXT |= line1 << 5;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          GBREG->setPixel(w, h, bVal);
-        }
-        line1 = ((line1 << 1) | GBREG->getPixel(w + 2, h - 1)) & 0x1f;
-        line2 = ((line2 << 1) | bVal) & 0x0f;
-      }
-    }
-  }
-  return GBREG.release();
-}
-
-CJBig2_Image* CJBig2_GRRDProc::decode(CJBig2_ArithDecoder* pArithDecoder,
-                                      JBig2ArithCtx* grContext) {
-  if (GRW == 0 || GRH == 0)
-    return new CJBig2_Image(GRW, GRH);
-
-  if (GRTEMPLATE == 0) {
-    if ((GRAT[0] == -1) && (GRAT[1] == -1) && (GRAT[2] == -1) &&
-        (GRAT[3] == -1) && (GRREFERENCEDX == 0) &&
-        (GRW == (FX_DWORD)GRREFERENCE->m_nWidth)) {
-      return decode_Template0_opt(pArithDecoder, grContext);
-    }
-    return decode_Template0_unopt(pArithDecoder, grContext);
-  }
-
-  if ((GRREFERENCEDX == 0) && (GRW == (FX_DWORD)GRREFERENCE->m_nWidth))
-    return decode_Template1_opt(pArithDecoder, grContext);
-  return decode_Template1_unopt(pArithDecoder, grContext);
-}
-
-CJBig2_Image* CJBig2_GRRDProc::decode_Template0_unopt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* grContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2, line3, line4, line5;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
-  GRREG->fill(0);
-  for (FX_DWORD h = 0; h < GRH; h++) {
-    if (TPGRON) {
-      SLTP = pArithDecoder->DECODE(&grContext[0x0010]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 0) {
-      line1 = GRREG->getPixel(1, h - 1);
-      line1 |= GRREG->getPixel(0, h - 1) << 1;
-      line2 = 0;
-      line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1);
-      line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1)
-               << 1;
-      line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
-      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
-      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
-               << 2;
-      line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
-      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
-               << 1;
-      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1)
-               << 2;
-      for (FX_DWORD w = 0; w < GRW; w++) {
-        CONTEXT = line5;
-        CONTEXT |= line4 << 3;
-        CONTEXT |= line3 << 6;
-        CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2],
-                                         h - GRREFERENCEDY + GRAT[3])
-                   << 8;
-        CONTEXT |= line2 << 9;
-        CONTEXT |= line1 << 10;
-        CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12;
-        bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
-        GRREG->setPixel(w, h, bVal);
-        line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03;
-        line2 = ((line2 << 1) | bVal) & 0x01;
-        line3 = ((line3 << 1) |
-                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
-                                       h - GRREFERENCEDY - 1)) &
-                0x03;
-        line4 =
-            ((line4 << 1) |
-             GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
-            0x07;
-        line5 = ((line5 << 1) |
-                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
-                                       h - GRREFERENCEDY + 1)) &
-                0x07;
-      }
-    } else {
-      line1 = GRREG->getPixel(1, h - 1);
-      line1 |= GRREG->getPixel(0, h - 1) << 1;
-      line2 = 0;
-      line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1);
-      line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1)
-               << 1;
-      line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
-      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
-      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
-               << 2;
-      line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
-      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
-               << 1;
-      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1)
-               << 2;
-      for (FX_DWORD w = 0; w < GRW; w++) {
-        bVal = GRREFERENCE->getPixel(w, h);
-        if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) &&
-              (bVal == GRREFERENCE->getPixel(w, h - 1)) &&
-              (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) &&
-              (bVal == GRREFERENCE->getPixel(w - 1, h)) &&
-              (bVal == GRREFERENCE->getPixel(w + 1, h)) &&
-              (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) &&
-              (bVal == GRREFERENCE->getPixel(w, h + 1)) &&
-              (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) {
-          CONTEXT = line5;
-          CONTEXT |= line4 << 3;
-          CONTEXT |= line3 << 6;
-          CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2],
-                                           h - GRREFERENCEDY + GRAT[3])
-                     << 8;
-          CONTEXT |= line2 << 9;
-          CONTEXT |= line1 << 10;
-          CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12;
-          bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
-        }
-        GRREG->setPixel(w, h, bVal);
-        line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03;
-        line2 = ((line2 << 1) | bVal) & 0x01;
-        line3 = ((line3 << 1) |
-                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
-                                       h - GRREFERENCEDY - 1)) &
-                0x03;
-        line4 =
-            ((line4 << 1) |
-             GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
-            0x07;
-        line5 = ((line5 << 1) |
-                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
-                                       h - GRREFERENCEDY + 1)) &
-                0x07;
-      }
-    }
-  }
-  return GRREG.release();
-}
-
-CJBig2_Image* CJBig2_GRRDProc::decode_Template0_opt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* grContext) {
-  if (!GRREFERENCE->m_pData)
-    return nullptr;
-
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line1_r, line2_r, line3_r;
-  uint8_t *pLine, *pLineR, cVal;
-  intptr_t nStride, nStrideR, nOffset;
-  int32_t k, nBits;
-  int32_t GRWR, GRHR;
-  int32_t GRW, GRH;
-  GRW = (int32_t)CJBig2_GRRDProc::GRW;
-  GRH = (int32_t)CJBig2_GRRDProc::GRH;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
-  if (!GRREG->m_pData)
-    return nullptr;
-
-  pLine = GRREG->m_pData;
-  pLineR = GRREFERENCE->m_pData;
-  nStride = GRREG->m_nStride;
-  nStrideR = GRREFERENCE->m_nStride;
-  GRWR = (int32_t)GRREFERENCE->m_nWidth;
-  GRHR = (int32_t)GRREFERENCE->m_nHeight;
-  if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) {
-    GRREFERENCEDY = 0;
-  }
-  nOffset = -GRREFERENCEDY * nStrideR;
-  for (int32_t h = 0; h < GRH; h++) {
-    if (TPGRON) {
-      SLTP = pArithDecoder->DECODE(&grContext[0x0010]);
-      LTP = LTP ^ SLTP;
-    }
-    line1 = (h > 0) ? pLine[-nStride] << 4 : 0;
-    int32_t reference_h = h - GRREFERENCEDY;
-    FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1);
-    FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR);
-    FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1);
-    line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0;
-    line2_r = line2_r_ok ? pLineR[nOffset] : 0;
-    line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0;
-    if (LTP == 0) {
-      CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) |
-                ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007);
-      for (int32_t w = 0; w < GRW; w += 8) {
-        nBits = GRW - w > 8 ? 8 : GRW - w;
-        if (h > 0)
-          line1 = (line1 << 8) |
-                  (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0);
-        if (h > GRHR + GRREFERENCEDY + 1) {
-          line1_r = 0;
-          line2_r = 0;
-          line3_r = 0;
-        } else {
-          if (line1_r_ok)
-            line1_r =
-                (line1_r << 8) |
-                (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
-          if (line2_r_ok)
-            line2_r = (line2_r << 8) |
-                      (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
-          if (line3_r_ok) {
-            line3_r =
-                (line3_r << 8) |
-                (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
-          } else {
-            line3_r = 0;
-          }
-        }
-        cVal = 0;
-        for (k = 0; k < nBits; k++) {
-          bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) |
-                    ((line1 >> (7 - k)) & 0x0400) |
-                    ((line1_r >> (7 - k)) & 0x0040) |
-                    ((line2_r >> (10 - k)) & 0x0008) |
-                    ((line3_r >> (13 - k)) & 0x0001);
-        }
-        pLine[w >> 3] = cVal;
-      }
-    } else {
-      CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) |
-                ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007);
-      for (int32_t w = 0; w < GRW; w += 8) {
-        nBits = GRW - w > 8 ? 8 : GRW - w;
-        if (h > 0)
-          line1 = (line1 << 8) |
-                  (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0);
-        if (line1_r_ok)
-          line1_r =
-              (line1_r << 8) |
-              (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
-        if (line2_r_ok)
-          line2_r = (line2_r << 8) |
-                    (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
-        if (line3_r_ok) {
-          line3_r =
-              (line3_r << 8) |
-              (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
-        } else {
-          line3_r = 0;
-        }
-        cVal = 0;
-        for (k = 0; k < nBits; k++) {
-          bVal = GRREFERENCE->getPixel(w + k, h);
-          if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k, h - 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k - 1, h)) &&
-                (bVal == GRREFERENCE->getPixel(w + k + 1, h)) &&
-                (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k, h + 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) {
-            bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
-          }
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) |
-                    ((line1 >> (7 - k)) & 0x0400) |
-                    ((line1_r >> (7 - k)) & 0x0040) |
-                    ((line2_r >> (10 - k)) & 0x0008) |
-                    ((line3_r >> (13 - k)) & 0x0001);
-        }
-        pLine[w >> 3] = cVal;
-      }
-    }
-    pLine += nStride;
-    if (h < GRHR + GRREFERENCEDY) {
-      pLineR += nStrideR;
-    }
-  }
-  return GRREG.release();
-}
-
-CJBig2_Image* CJBig2_GRRDProc::decode_Template1_unopt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* grContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2, line3, line4, line5;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
-  GRREG->fill(0);
-  for (FX_DWORD h = 0; h < GRH; h++) {
-    if (TPGRON) {
-      SLTP = pArithDecoder->DECODE(&grContext[0x0008]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 0) {
-      line1 = GRREG->getPixel(1, h - 1);
-      line1 |= GRREG->getPixel(0, h - 1) << 1;
-      line1 |= GRREG->getPixel(-1, h - 1) << 2;
-      line2 = 0;
-      line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1);
-      line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
-      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
-      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
-               << 2;
-      line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
-      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
-               << 1;
-      for (FX_DWORD w = 0; w < GRW; w++) {
-        CONTEXT = line5;
-        CONTEXT |= line4 << 2;
-        CONTEXT |= line3 << 5;
-        CONTEXT |= line2 << 6;
-        CONTEXT |= line1 << 7;
-        bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
-        GRREG->setPixel(w, h, bVal);
-        line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07;
-        line2 = ((line2 << 1) | bVal) & 0x01;
-        line3 = ((line3 << 1) |
-                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 1,
-                                       h - GRREFERENCEDY - 1)) &
-                0x01;
-        line4 =
-            ((line4 << 1) |
-             GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
-            0x07;
-        line5 = ((line5 << 1) |
-                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
-                                       h - GRREFERENCEDY + 1)) &
-                0x03;
-      }
-    } else {
-      line1 = GRREG->getPixel(1, h - 1);
-      line1 |= GRREG->getPixel(0, h - 1) << 1;
-      line1 |= GRREG->getPixel(-1, h - 1) << 2;
-      line2 = 0;
-      line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1);
-      line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
-      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
-      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
-               << 2;
-      line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
-      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
-               << 1;
-      for (FX_DWORD w = 0; w < GRW; w++) {
-        bVal = GRREFERENCE->getPixel(w, h);
-        if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) &&
-              (bVal == GRREFERENCE->getPixel(w, h - 1)) &&
-              (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) &&
-              (bVal == GRREFERENCE->getPixel(w - 1, h)) &&
-              (bVal == GRREFERENCE->getPixel(w + 1, h)) &&
-              (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) &&
-              (bVal == GRREFERENCE->getPixel(w, h + 1)) &&
-              (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) {
-          CONTEXT = line5;
-          CONTEXT |= line4 << 2;
-          CONTEXT |= line3 << 5;
-          CONTEXT |= line2 << 6;
-          CONTEXT |= line1 << 7;
-          bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
-        }
-        GRREG->setPixel(w, h, bVal);
-        line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07;
-        line2 = ((line2 << 1) | bVal) & 0x01;
-        line3 = ((line3 << 1) |
-                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 1,
-                                       h - GRREFERENCEDY - 1)) &
-                0x01;
-        line4 =
-            ((line4 << 1) |
-             GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
-            0x07;
-        line5 = ((line5 << 1) |
-                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
-                                       h - GRREFERENCEDY + 1)) &
-                0x03;
-      }
-    }
-  }
-  return GRREG.release();
-}
-
-CJBig2_Image* CJBig2_GRRDProc::decode_Template1_opt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* grContext) {
-  if (!GRREFERENCE->m_pData)
-    return nullptr;
-
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line1_r, line2_r, line3_r;
-  uint8_t *pLine, *pLineR, cVal;
-  intptr_t nStride, nStrideR, nOffset;
-  int32_t k, nBits;
-  int32_t GRWR, GRHR;
-  int32_t GRW, GRH;
-  GRW = (int32_t)CJBig2_GRRDProc::GRW;
-  GRH = (int32_t)CJBig2_GRRDProc::GRH;
-  LTP = 0;
-  nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
-  if (!GRREG->m_pData)
-    return nullptr;
-
-  pLine = GRREG->m_pData;
-  pLineR = GRREFERENCE->m_pData;
-  nStride = GRREG->m_nStride;
-  nStrideR = GRREFERENCE->m_nStride;
-  GRWR = (int32_t)GRREFERENCE->m_nWidth;
-  GRHR = (int32_t)GRREFERENCE->m_nHeight;
-  if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) {
-    GRREFERENCEDY = 0;
-  }
-  nOffset = -GRREFERENCEDY * nStrideR;
-  for (int32_t h = 0; h < GRH; h++) {
-    if (TPGRON) {
-      SLTP = pArithDecoder->DECODE(&grContext[0x0008]);
-      LTP = LTP ^ SLTP;
-    }
-    line1 = (h > 0) ? pLine[-nStride] << 1 : 0;
-    int32_t reference_h = h - GRREFERENCEDY;
-    FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1);
-    FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR);
-    FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1);
-    line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0;
-    line2_r = line2_r_ok ? pLineR[nOffset] : 0;
-    line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0;
-    if (LTP == 0) {
-      CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) |
-                ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003);
-      for (int32_t w = 0; w < GRW; w += 8) {
-        nBits = GRW - w > 8 ? 8 : GRW - w;
-        if (h > 0)
-          line1 = (line1 << 8) |
-                  (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0);
-        if (line1_r_ok)
-          line1_r =
-              (line1_r << 8) |
-              (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
-        if (line2_r_ok)
-          line2_r = (line2_r << 8) |
-                    (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
-        if (line3_r_ok) {
-          line3_r =
-              (line3_r << 8) |
-              (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
-        } else {
-          line3_r = 0;
-        }
-        cVal = 0;
-        for (k = 0; k < nBits; k++) {
-          bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) |
-                    ((line1 >> (7 - k)) & 0x0080) |
-                    ((line1_r >> (9 - k)) & 0x0020) |
-                    ((line2_r >> (11 - k)) & 0x0004) |
-                    ((line3_r >> (13 - k)) & 0x0001);
-        }
-        pLine[w >> 3] = cVal;
-      }
-    } else {
-      CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) |
-                ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003);
-      for (int32_t w = 0; w < GRW; w += 8) {
-        nBits = GRW - w > 8 ? 8 : GRW - w;
-        if (h > 0)
-          line1 = (line1 << 8) |
-                  (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0);
-        if (line1_r_ok)
-          line1_r =
-              (line1_r << 8) |
-              (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
-        if (line2_r_ok)
-          line2_r = (line2_r << 8) |
-                    (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
-        if (line3_r_ok) {
-          line3_r =
-              (line3_r << 8) |
-              (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
-        } else {
-          line3_r = 0;
-        }
-        cVal = 0;
-        for (k = 0; k < nBits; k++) {
-          bVal = GRREFERENCE->getPixel(w + k, h);
-          if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k, h - 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k - 1, h)) &&
-                (bVal == GRREFERENCE->getPixel(w + k + 1, h)) &&
-                (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k, h + 1)) &&
-                (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) {
-            bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
-          }
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) |
-                    ((line1 >> (7 - k)) & 0x0080) |
-                    ((line1_r >> (9 - k)) & 0x0020) |
-                    ((line2_r >> (11 - k)) & 0x0004) |
-                    ((line3_r >> (13 - k)) & 0x0001);
-        }
-        pLine[w >> 3] = cVal;
-      }
-    }
-    pLine += nStride;
-    if (h < GRHR + GRREFERENCEDY) {
-      pLineR += nStrideR;
-    }
-  }
-  return GRREG.release();
-}
-
-CJBig2_Image* CJBig2_TRDProc::decode_Huffman(CJBig2_BitStream* pStream,
-                                             JBig2ArithCtx* grContext) {
-  int32_t STRIPT, FIRSTS;
-  FX_DWORD NINSTANCES;
-  int32_t DT, DFS, CURS;
-  uint8_t CURT;
-  int32_t SI, TI;
-  FX_DWORD IDI;
-  CJBig2_Image* IBI;
-  FX_DWORD WI, HI;
-  int32_t IDS;
-  FX_BOOL RI;
-  int32_t RDWI, RDHI, RDXI, RDYI;
-  CJBig2_Image* IBOI;
-  FX_DWORD WOI, HOI;
-  FX_BOOL bFirst;
-  FX_DWORD nTmp;
-  int32_t nVal, nBits;
-  nonstd::unique_ptr<CJBig2_HuffmanDecoder> pHuffmanDecoder(
-      new CJBig2_HuffmanDecoder(pStream));
-  nonstd::unique_ptr<CJBig2_Image> SBREG(new CJBig2_Image(SBW, SBH));
-  SBREG->fill(SBDEFPIXEL);
-  if (pHuffmanDecoder->decodeAValue(SBHUFFDT, &STRIPT) != 0)
-    return nullptr;
-
-  STRIPT *= SBSTRIPS;
-  STRIPT = -STRIPT;
-  FIRSTS = 0;
-  NINSTANCES = 0;
-  while (NINSTANCES < SBNUMINSTANCES) {
-    if (pHuffmanDecoder->decodeAValue(SBHUFFDT, &DT) != 0)
-      return nullptr;
-
-    DT *= SBSTRIPS;
-    STRIPT = STRIPT + DT;
-    bFirst = TRUE;
-    for (;;) {
-      if (bFirst) {
-        if (pHuffmanDecoder->decodeAValue(SBHUFFFS, &DFS) != 0)
-          return nullptr;
-
-        FIRSTS = FIRSTS + DFS;
-        CURS = FIRSTS;
-        bFirst = FALSE;
-      } else {
-        nVal = pHuffmanDecoder->decodeAValue(SBHUFFDS, &IDS);
-        if (nVal == JBIG2_OOB) {
-          break;
-        } else if (nVal != 0) {
-          return nullptr;
-        } else {
-          CURS = CURS + IDS + SBDSOFFSET;
-        }
-      }
-      if (SBSTRIPS == 1) {
-        CURT = 0;
-      } else {
-        nTmp = 1;
-        while ((FX_DWORD)(1 << nTmp) < SBSTRIPS) {
-          nTmp++;
-        }
-        if (pStream->readNBits(nTmp, &nVal) != 0)
-          return nullptr;
-
-        CURT = nVal;
-      }
-      TI = STRIPT + CURT;
-      nVal = 0;
-      nBits = 0;
-      for (;;) {
-        if (pStream->read1Bit(&nTmp) != 0)
-          return nullptr;
-
-        nVal = (nVal << 1) | nTmp;
-        nBits++;
-        for (IDI = 0; IDI < SBNUMSYMS; IDI++) {
-          if ((nBits == SBSYMCODES[IDI].codelen) &&
-              (nVal == SBSYMCODES[IDI].code)) {
-            break;
-          }
-        }
-        if (IDI < SBNUMSYMS) {
-          break;
-        }
-      }
-      if (SBREFINE == 0) {
-        RI = 0;
-      } else {
-        if (pStream->read1Bit(&RI) != 0) {
-          return nullptr;
-        }
-      }
-      if (RI == 0) {
-        IBI = SBSYMS[IDI];
-      } else {
-        if ((pHuffmanDecoder->decodeAValue(SBHUFFRDW, &RDWI) != 0) ||
-            (pHuffmanDecoder->decodeAValue(SBHUFFRDH, &RDHI) != 0) ||
-            (pHuffmanDecoder->decodeAValue(SBHUFFRDX, &RDXI) != 0) ||
-            (pHuffmanDecoder->decodeAValue(SBHUFFRDY, &RDYI) != 0) ||
-            (pHuffmanDecoder->decodeAValue(SBHUFFRSIZE, &nVal) != 0)) {
-          return nullptr;
-        }
-        pStream->alignByte();
-        nTmp = pStream->getOffset();
-        IBOI = SBSYMS[IDI];
-        if (!IBOI)
-          return nullptr;
-
-        WOI = IBOI->m_nWidth;
-        HOI = IBOI->m_nHeight;
-        if ((int)(WOI + RDWI) < 0 || (int)(HOI + RDHI) < 0)
-          return nullptr;
-
-        nonstd::unique_ptr<CJBig2_GRRDProc> pGRRD(new CJBig2_GRRDProc());
-        pGRRD->GRW = WOI + RDWI;
-        pGRRD->GRH = HOI + RDHI;
-        pGRRD->GRTEMPLATE = SBRTEMPLATE;
-        pGRRD->GRREFERENCE = IBOI;
-        pGRRD->GRREFERENCEDX = (RDWI >> 2) + RDXI;
-        pGRRD->GRREFERENCEDY = (RDHI >> 2) + RDYI;
-        pGRRD->TPGRON = 0;
-        pGRRD->GRAT[0] = SBRAT[0];
-        pGRRD->GRAT[1] = SBRAT[1];
-        pGRRD->GRAT[2] = SBRAT[2];
-        pGRRD->GRAT[3] = SBRAT[3];
-
-        {
-          nonstd::unique_ptr<CJBig2_ArithDecoder> pArithDecoder(
-              new CJBig2_ArithDecoder(pStream));
-          IBI = pGRRD->decode(pArithDecoder.get(), grContext);
-          if (!IBI)
-            return nullptr;
-        }
-
-        pStream->alignByte();
-        pStream->offset(2);
-        if ((FX_DWORD)nVal != (pStream->getOffset() - nTmp)) {
-          delete IBI;
-          return nullptr;
-        }
-      }
-      if (!IBI) {
-        continue;
-      }
-      WI = IBI->m_nWidth;
-      HI = IBI->m_nHeight;
-      if (TRANSPOSED == 0 && ((REFCORNER == JBIG2_CORNER_TOPRIGHT) ||
-                              (REFCORNER == JBIG2_CORNER_BOTTOMRIGHT))) {
-        CURS = CURS + WI - 1;
-      } else if (TRANSPOSED == 1 && ((REFCORNER == JBIG2_CORNER_BOTTOMLEFT) ||
-                                     (REFCORNER == JBIG2_CORNER_BOTTOMRIGHT))) {
-        CURS = CURS + HI - 1;
-      }
-      SI = CURS;
-      if (TRANSPOSED == 0) {
-        switch (REFCORNER) {
-          case JBIG2_CORNER_TOPLEFT:
-            SBREG->composeFrom(SI, TI, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_TOPRIGHT:
-            SBREG->composeFrom(SI - WI + 1, TI, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_BOTTOMLEFT:
-            SBREG->composeFrom(SI, TI - HI + 1, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_BOTTOMRIGHT:
-            SBREG->composeFrom(SI - WI + 1, TI - HI + 1, IBI, SBCOMBOP);
-            break;
-        }
-      } else {
-        switch (REFCORNER) {
-          case JBIG2_CORNER_TOPLEFT:
-            SBREG->composeFrom(TI, SI, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_TOPRIGHT:
-            SBREG->composeFrom(TI - WI + 1, SI, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_BOTTOMLEFT:
-            SBREG->composeFrom(TI, SI - HI + 1, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_BOTTOMRIGHT:
-            SBREG->composeFrom(TI - WI + 1, SI - HI + 1, IBI, SBCOMBOP);
-            break;
-        }
-      }
-      if (RI != 0) {
-        delete IBI;
-      }
-      if (TRANSPOSED == 0 && ((REFCORNER == JBIG2_CORNER_TOPLEFT) ||
-                              (REFCORNER == JBIG2_CORNER_BOTTOMLEFT))) {
-        CURS = CURS + WI - 1;
-      } else if (TRANSPOSED == 1 && ((REFCORNER == JBIG2_CORNER_TOPLEFT) ||
-                                     (REFCORNER == JBIG2_CORNER_TOPRIGHT))) {
-        CURS = CURS + HI - 1;
-      }
-      NINSTANCES = NINSTANCES + 1;
-    }
-  }
-  return SBREG.release();
-}
-
-CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                                           JBig2ArithCtx* grContext,
-                                           JBig2IntDecoderState* pIDS) {
-  int32_t STRIPT, FIRSTS;
-  FX_DWORD NINSTANCES;
-  int32_t DT, DFS, CURS;
-  int32_t CURT;
-  int32_t SI, TI;
-  FX_DWORD IDI;
-  CJBig2_Image* IBI;
-  FX_DWORD WI, HI;
-  int32_t IDS;
-  int RI;
-  int32_t RDWI, RDHI, RDXI, RDYI;
-  CJBig2_Image* IBOI;
-  FX_DWORD WOI, HOI;
-  FX_BOOL bFirst;
-  int32_t nRet, nVal;
-  int32_t bRetained;
-  CJBig2_ArithIntDecoder *IADT, *IAFS, *IADS, *IAIT, *IARI, *IARDW, *IARDH,
-      *IARDX, *IARDY;
-  CJBig2_ArithIaidDecoder* IAID;
-  if (pIDS) {
-    IADT = pIDS->IADT;
-    IAFS = pIDS->IAFS;
-    IADS = pIDS->IADS;
-    IAIT = pIDS->IAIT;
-    IARI = pIDS->IARI;
-    IARDW = pIDS->IARDW;
-    IARDH = pIDS->IARDH;
-    IARDX = pIDS->IARDX;
-    IARDY = pIDS->IARDY;
-    IAID = pIDS->IAID;
-    bRetained = TRUE;
-  } else {
-    IADT = new CJBig2_ArithIntDecoder();
-    IAFS = new CJBig2_ArithIntDecoder();
-    IADS = new CJBig2_ArithIntDecoder();
-    IAIT = new CJBig2_ArithIntDecoder();
-    IARI = new CJBig2_ArithIntDecoder();
-    IARDW = new CJBig2_ArithIntDecoder();
-    IARDH = new CJBig2_ArithIntDecoder();
-    IARDX = new CJBig2_ArithIntDecoder();
-    IARDY = new CJBig2_ArithIntDecoder();
-    IAID = new CJBig2_ArithIaidDecoder(SBSYMCODELEN);
-    bRetained = FALSE;
-  }
-  nonstd::unique_ptr<CJBig2_Image> SBREG(new CJBig2_Image(SBW, SBH));
-  SBREG->fill(SBDEFPIXEL);
-  if (IADT->decode(pArithDecoder, &STRIPT) == -1) {
-    goto failed;
-  }
-  STRIPT *= SBSTRIPS;
-  STRIPT = -STRIPT;
-  FIRSTS = 0;
-  NINSTANCES = 0;
-  while (NINSTANCES < SBNUMINSTANCES) {
-    if (IADT->decode(pArithDecoder, &DT) == -1) {
-      goto failed;
-    }
-    DT *= SBSTRIPS;
-    STRIPT = STRIPT + DT;
-    bFirst = TRUE;
-    for (;;) {
-      if (bFirst) {
-        if (IAFS->decode(pArithDecoder, &DFS) == -1) {
-          goto failed;
-        }
-        FIRSTS = FIRSTS + DFS;
-        CURS = FIRSTS;
-        bFirst = FALSE;
-      } else {
-        nRet = IADS->decode(pArithDecoder, &IDS);
-        if (nRet == JBIG2_OOB) {
-          break;
-        } else if (nRet != 0) {
-          goto failed;
-        } else {
-          CURS = CURS + IDS + SBDSOFFSET;
-        }
-      }
-      if (NINSTANCES >= SBNUMINSTANCES) {
-        break;
-      }
-      if (SBSTRIPS == 1) {
-        CURT = 0;
-      } else {
-        if (IAIT->decode(pArithDecoder, &nVal) == -1) {
-          goto failed;
-        }
-        CURT = nVal;
-      }
-      TI = STRIPT + CURT;
-      if (IAID->decode(pArithDecoder, &nVal) == -1) {
-        goto failed;
-      }
-      IDI = nVal;
-      if (IDI >= SBNUMSYMS) {
-        goto failed;
-      }
-      if (SBREFINE == 0) {
-        RI = 0;
-      } else {
-        if (IARI->decode(pArithDecoder, &RI) == -1) {
-          goto failed;
-        }
-      }
-      if (!SBSYMS[IDI]) {
-        goto failed;
-      }
-      if (RI == 0) {
-        IBI = SBSYMS[IDI];
-      } else {
-        if ((IARDW->decode(pArithDecoder, &RDWI) == -1) ||
-            (IARDH->decode(pArithDecoder, &RDHI) == -1) ||
-            (IARDX->decode(pArithDecoder, &RDXI) == -1) ||
-            (IARDY->decode(pArithDecoder, &RDYI) == -1)) {
-          goto failed;
-        }
-        IBOI = SBSYMS[IDI];
-        WOI = IBOI->m_nWidth;
-        HOI = IBOI->m_nHeight;
-        if ((int)(WOI + RDWI) < 0 || (int)(HOI + RDHI) < 0) {
-          goto failed;
-        }
-        nonstd::unique_ptr<CJBig2_GRRDProc> pGRRD(new CJBig2_GRRDProc());
-        pGRRD->GRW = WOI + RDWI;
-        pGRRD->GRH = HOI + RDHI;
-        pGRRD->GRTEMPLATE = SBRTEMPLATE;
-        pGRRD->GRREFERENCE = IBOI;
-        pGRRD->GRREFERENCEDX = (RDWI >> 1) + RDXI;
-        pGRRD->GRREFERENCEDY = (RDHI >> 1) + RDYI;
-        pGRRD->TPGRON = 0;
-        pGRRD->GRAT[0] = SBRAT[0];
-        pGRRD->GRAT[1] = SBRAT[1];
-        pGRRD->GRAT[2] = SBRAT[2];
-        pGRRD->GRAT[3] = SBRAT[3];
-        IBI = pGRRD->decode(pArithDecoder, grContext);
-        if (!IBI)
-          goto failed;
-      }
-      WI = IBI->m_nWidth;
-      HI = IBI->m_nHeight;
-      if (TRANSPOSED == 0 && ((REFCORNER == JBIG2_CORNER_TOPRIGHT) ||
-                              (REFCORNER == JBIG2_CORNER_BOTTOMRIGHT))) {
-        CURS = CURS + WI - 1;
-      } else if (TRANSPOSED == 1 && ((REFCORNER == JBIG2_CORNER_BOTTOMLEFT) ||
-                                     (REFCORNER == JBIG2_CORNER_BOTTOMRIGHT))) {
-        CURS = CURS + HI - 1;
-      }
-      SI = CURS;
-      if (TRANSPOSED == 0) {
-        switch (REFCORNER) {
-          case JBIG2_CORNER_TOPLEFT:
-            SBREG->composeFrom(SI, TI, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_TOPRIGHT:
-            SBREG->composeFrom(SI - WI + 1, TI, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_BOTTOMLEFT:
-            SBREG->composeFrom(SI, TI - HI + 1, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_BOTTOMRIGHT:
-            SBREG->composeFrom(SI - WI + 1, TI - HI + 1, IBI, SBCOMBOP);
-            break;
-        }
-      } else {
-        switch (REFCORNER) {
-          case JBIG2_CORNER_TOPLEFT:
-            SBREG->composeFrom(TI, SI, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_TOPRIGHT:
-            SBREG->composeFrom(TI - WI + 1, SI, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_BOTTOMLEFT:
-            SBREG->composeFrom(TI, SI - HI + 1, IBI, SBCOMBOP);
-            break;
-          case JBIG2_CORNER_BOTTOMRIGHT:
-            SBREG->composeFrom(TI - WI + 1, SI - HI + 1, IBI, SBCOMBOP);
-            break;
-        }
-      }
-      if (RI != 0) {
-        delete IBI;
-      }
-      if (TRANSPOSED == 0 && ((REFCORNER == JBIG2_CORNER_TOPLEFT) ||
-                              (REFCORNER == JBIG2_CORNER_BOTTOMLEFT))) {
-        CURS = CURS + WI - 1;
-      } else if (TRANSPOSED == 1 && ((REFCORNER == JBIG2_CORNER_TOPLEFT) ||
-                                     (REFCORNER == JBIG2_CORNER_TOPRIGHT))) {
-        CURS = CURS + HI - 1;
-      }
-      NINSTANCES = NINSTANCES + 1;
-    }
-  }
-  if (bRetained == FALSE) {
-    delete IADT;
-    delete IAFS;
-    delete IADS;
-    delete IAIT;
-    delete IARI;
-    delete IARDW;
-    delete IARDH;
-    delete IARDX;
-    delete IARDY;
-    delete IAID;
-  }
-  return SBREG.release();
-failed:
-  if (bRetained == FALSE) {
-    delete IADT;
-    delete IAFS;
-    delete IADS;
-    delete IAIT;
-    delete IARI;
-    delete IARDW;
-    delete IARDH;
-    delete IARDX;
-    delete IARDY;
-    delete IAID;
-  }
-  return nullptr;
-}
-
-CJBig2_SymbolDict* CJBig2_SDDProc::decode_Arith(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    JBig2ArithCtx* grContext) {
-  CJBig2_Image** SDNEWSYMS;
-  FX_DWORD HCHEIGHT, NSYMSDECODED;
-  int32_t HCDH;
-  FX_DWORD SYMWIDTH, TOTWIDTH;
-  int32_t DW;
-  CJBig2_Image* BS;
-  FX_DWORD I, J, REFAGGNINST;
-  FX_BOOL* EXFLAGS;
-  FX_DWORD EXINDEX;
-  FX_BOOL CUREXFLAG;
-  FX_DWORD EXRUNLENGTH;
-  int32_t nVal;
-  FX_DWORD nTmp;
-  FX_DWORD SBNUMSYMS;
-  uint8_t SBSYMCODELEN;
-  FX_DWORD IDI;
-  int32_t RDXI, RDYI;
-  CJBig2_Image** SBSYMS;
-  nonstd::unique_ptr<CJBig2_ArithIaidDecoder> IAID;
-  nonstd::unique_ptr<CJBig2_SymbolDict> pDict;
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IADH(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IADW(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IAAI(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARDX(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARDY(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IAEX(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IADT(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IAFS(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IADS(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IAIT(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARI(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARDW(new CJBig2_ArithIntDecoder);
-  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARDH(new CJBig2_ArithIntDecoder);
-  nTmp = 0;
-  while ((FX_DWORD)(1 << nTmp) < (SDNUMINSYMS + SDNUMNEWSYMS)) {
-    nTmp++;
-  }
-  IAID.reset(new CJBig2_ArithIaidDecoder((uint8_t)nTmp));
-  SDNEWSYMS = FX_Alloc(CJBig2_Image*, SDNUMNEWSYMS);
-  FXSYS_memset(SDNEWSYMS, 0, SDNUMNEWSYMS * sizeof(CJBig2_Image*));
-
-  HCHEIGHT = 0;
-  NSYMSDECODED = 0;
-  while (NSYMSDECODED < SDNUMNEWSYMS) {
-    BS = nullptr;
-    if (IADH->decode(pArithDecoder, &HCDH) == -1) {
-      goto failed;
-    }
-    HCHEIGHT = HCHEIGHT + HCDH;
-    if ((int)HCHEIGHT < 0 || (int)HCHEIGHT > JBIG2_MAX_IMAGE_SIZE) {
-      goto failed;
-    }
-    SYMWIDTH = 0;
-    TOTWIDTH = 0;
-    for (;;) {
-      nVal = IADW->decode(pArithDecoder, &DW);
-      if (nVal == JBIG2_OOB) {
-        break;
-      } else if (nVal != 0) {
-        goto failed;
-      } else {
-        if (NSYMSDECODED >= SDNUMNEWSYMS) {
-          goto failed;
-        }
-        SYMWIDTH = SYMWIDTH + DW;
-        if ((int)SYMWIDTH < 0 || (int)SYMWIDTH > JBIG2_MAX_IMAGE_SIZE) {
-          goto failed;
-        } else if (HCHEIGHT == 0 || SYMWIDTH == 0) {
-          TOTWIDTH = TOTWIDTH + SYMWIDTH;
-          SDNEWSYMS[NSYMSDECODED] = nullptr;
-          NSYMSDECODED = NSYMSDECODED + 1;
-          continue;
-        }
-        TOTWIDTH = TOTWIDTH + SYMWIDTH;
-      }
-      if (SDREFAGG == 0) {
-        nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
-        pGRD->MMR = 0;
-        pGRD->GBW = SYMWIDTH;
-        pGRD->GBH = HCHEIGHT;
-        pGRD->GBTEMPLATE = SDTEMPLATE;
-        pGRD->TPGDON = 0;
-        pGRD->USESKIP = 0;
-        pGRD->GBAT[0] = SDAT[0];
-        pGRD->GBAT[1] = SDAT[1];
-        pGRD->GBAT[2] = SDAT[2];
-        pGRD->GBAT[3] = SDAT[3];
-        pGRD->GBAT[4] = SDAT[4];
-        pGRD->GBAT[5] = SDAT[5];
-        pGRD->GBAT[6] = SDAT[6];
-        pGRD->GBAT[7] = SDAT[7];
-        BS = pGRD->decode_Arith(pArithDecoder, gbContext);
-        if (!BS) {
-          goto failed;
-        }
-      } else {
-        if (IAAI->decode(pArithDecoder, (int*)&REFAGGNINST) == -1) {
-          goto failed;
-        }
-        if (REFAGGNINST > 1) {
-          nonstd::unique_ptr<CJBig2_TRDProc> pDecoder(new CJBig2_TRDProc());
-          pDecoder->SBHUFF = SDHUFF;
-          pDecoder->SBREFINE = 1;
-          pDecoder->SBW = SYMWIDTH;
-          pDecoder->SBH = HCHEIGHT;
-          pDecoder->SBNUMINSTANCES = REFAGGNINST;
-          pDecoder->SBSTRIPS = 1;
-          pDecoder->SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
-          SBNUMSYMS = pDecoder->SBNUMSYMS;
-          nTmp = 0;
-          while ((FX_DWORD)(1 << nTmp) < SBNUMSYMS) {
-            nTmp++;
-          }
-          SBSYMCODELEN = (uint8_t)nTmp;
-          pDecoder->SBSYMCODELEN = SBSYMCODELEN;
-          SBSYMS = FX_Alloc(CJBig2_Image*, SBNUMSYMS);
-          JBIG2_memcpy(SBSYMS, SDINSYMS, SDNUMINSYMS * sizeof(CJBig2_Image*));
-          JBIG2_memcpy(SBSYMS + SDNUMINSYMS, SDNEWSYMS,
-                       NSYMSDECODED * sizeof(CJBig2_Image*));
-          pDecoder->SBSYMS = SBSYMS;
-          pDecoder->SBDEFPIXEL = 0;
-          pDecoder->SBCOMBOP = JBIG2_COMPOSE_OR;
-          pDecoder->TRANSPOSED = 0;
-          pDecoder->REFCORNER = JBIG2_CORNER_TOPLEFT;
-          pDecoder->SBDSOFFSET = 0;
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFFS(
-              new CJBig2_HuffmanTable(HuffmanTable_B6,
-                                      FX_ArraySize(HuffmanTable_B6),
-                                      HuffmanTable_HTOOB_B6));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFDS(
-              new CJBig2_HuffmanTable(HuffmanTable_B8,
-                                      FX_ArraySize(HuffmanTable_B8),
-                                      HuffmanTable_HTOOB_B8));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFDT(
-              new CJBig2_HuffmanTable(HuffmanTable_B11,
-                                      FX_ArraySize(HuffmanTable_B11),
-                                      HuffmanTable_HTOOB_B11));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDW(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDH(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDX(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDY(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRSIZE(
-              new CJBig2_HuffmanTable(HuffmanTable_B1,
-                                      FX_ArraySize(HuffmanTable_B1),
-                                      HuffmanTable_HTOOB_B1));
-          pDecoder->SBHUFFFS = SBHUFFFS.get();
-          pDecoder->SBHUFFDS = SBHUFFDS.get();
-          pDecoder->SBHUFFDT = SBHUFFDT.get();
-          pDecoder->SBHUFFRDW = SBHUFFRDW.get();
-          pDecoder->SBHUFFRDH = SBHUFFRDH.get();
-          pDecoder->SBHUFFRDX = SBHUFFRDX.get();
-          pDecoder->SBHUFFRDY = SBHUFFRDY.get();
-          pDecoder->SBHUFFRSIZE = SBHUFFRSIZE.get();
-          pDecoder->SBRTEMPLATE = SDRTEMPLATE;
-          pDecoder->SBRAT[0] = SDRAT[0];
-          pDecoder->SBRAT[1] = SDRAT[1];
-          pDecoder->SBRAT[2] = SDRAT[2];
-          pDecoder->SBRAT[3] = SDRAT[3];
-          JBig2IntDecoderState ids;
-          ids.IADT = IADT.get();
-          ids.IAFS = IAFS.get();
-          ids.IADS = IADS.get();
-          ids.IAIT = IAIT.get();
-          ids.IARI = IARI.get();
-          ids.IARDW = IARDW.get();
-          ids.IARDH = IARDH.get();
-          ids.IARDX = IARDX.get();
-          ids.IARDY = IARDY.get();
-          ids.IAID = IAID.get();
-          BS = pDecoder->decode_Arith(pArithDecoder, grContext, &ids);
-          if (!BS) {
-            FX_Free(SBSYMS);
-            goto failed;
-          }
-          FX_Free(SBSYMS);
-        } else if (REFAGGNINST == 1) {
-          SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
-          if (IAID->decode(pArithDecoder, (int*)&IDI) == -1) {
-            goto failed;
-          }
-          if ((IARDX->decode(pArithDecoder, &RDXI) == -1) ||
-              (IARDY->decode(pArithDecoder, &RDYI) == -1)) {
-            goto failed;
-          }
-          if (IDI >= SBNUMSYMS) {
-            goto failed;
-          }
-          SBSYMS = FX_Alloc(CJBig2_Image*, SBNUMSYMS);
-          JBIG2_memcpy(SBSYMS, SDINSYMS, SDNUMINSYMS * sizeof(CJBig2_Image*));
-          JBIG2_memcpy(SBSYMS + SDNUMINSYMS, SDNEWSYMS,
-                       NSYMSDECODED * sizeof(CJBig2_Image*));
-          if (!SBSYMS[IDI]) {
-            FX_Free(SBSYMS);
-            goto failed;
-          }
-          nonstd::unique_ptr<CJBig2_GRRDProc> pGRRD(new CJBig2_GRRDProc());
-          pGRRD->GRW = SYMWIDTH;
-          pGRRD->GRH = HCHEIGHT;
-          pGRRD->GRTEMPLATE = SDRTEMPLATE;
-          pGRRD->GRREFERENCE = SBSYMS[IDI];
-          pGRRD->GRREFERENCEDX = RDXI;
-          pGRRD->GRREFERENCEDY = RDYI;
-          pGRRD->TPGRON = 0;
-          pGRRD->GRAT[0] = SDRAT[0];
-          pGRRD->GRAT[1] = SDRAT[1];
-          pGRRD->GRAT[2] = SDRAT[2];
-          pGRRD->GRAT[3] = SDRAT[3];
-          BS = pGRRD->decode(pArithDecoder, grContext);
-          if (!BS) {
-            FX_Free(SBSYMS);
-            goto failed;
-          }
-          FX_Free(SBSYMS);
-        }
-      }
-      SDNEWSYMS[NSYMSDECODED] = BS;
-      BS = nullptr;
-      NSYMSDECODED = NSYMSDECODED + 1;
-    }
-  }
-  EXINDEX = 0;
-  CUREXFLAG = 0;
-  EXFLAGS = FX_Alloc(FX_BOOL, SDNUMINSYMS + SDNUMNEWSYMS);
-  while (EXINDEX < SDNUMINSYMS + SDNUMNEWSYMS) {
-    if (IAEX->decode(pArithDecoder, (int*)&EXRUNLENGTH) == -1) {
-      FX_Free(EXFLAGS);
-      goto failed;
-    }
-    if (EXINDEX + EXRUNLENGTH > SDNUMINSYMS + SDNUMNEWSYMS) {
-      FX_Free(EXFLAGS);
-      goto failed;
-    }
-    if (EXRUNLENGTH != 0) {
-      for (I = EXINDEX; I < EXINDEX + EXRUNLENGTH; I++) {
-        EXFLAGS[I] = CUREXFLAG;
-      }
-    }
-    EXINDEX = EXINDEX + EXRUNLENGTH;
-    CUREXFLAG = !CUREXFLAG;
-  }
-  pDict.reset(new CJBig2_SymbolDict);
-  pDict->SDNUMEXSYMS = SDNUMEXSYMS;
-  pDict->SDEXSYMS = FX_Alloc(CJBig2_Image*, SDNUMEXSYMS);
-  I = J = 0;
-  for (I = 0; I < SDNUMINSYMS + SDNUMNEWSYMS; I++) {
-    if (EXFLAGS[I] && J < SDNUMEXSYMS) {
-      if (I < SDNUMINSYMS) {
-        pDict->SDEXSYMS[J] = new CJBig2_Image(*SDINSYMS[I]);
-      } else {
-        pDict->SDEXSYMS[J] = SDNEWSYMS[I - SDNUMINSYMS];
-      }
-      J = J + 1;
-    } else if (!EXFLAGS[I] && I >= SDNUMINSYMS) {
-      delete SDNEWSYMS[I - SDNUMINSYMS];
-    }
-  }
-  if (J < SDNUMEXSYMS) {
-    pDict->SDNUMEXSYMS = J;
-  }
-  FX_Free(EXFLAGS);
-  FX_Free(SDNEWSYMS);
-  return pDict.release();
-failed:
-  for (I = 0; I < NSYMSDECODED; I++) {
-    if (SDNEWSYMS[I]) {
-      delete SDNEWSYMS[I];
-      SDNEWSYMS[I] = nullptr;
-    }
-  }
-  FX_Free(SDNEWSYMS);
-  return nullptr;
-}
-
-CJBig2_SymbolDict* CJBig2_SDDProc::decode_Huffman(CJBig2_BitStream* pStream,
-                                                  JBig2ArithCtx* gbContext,
-                                                  JBig2ArithCtx* grContext,
-                                                  IFX_Pause* pPause) {
-  CJBig2_Image** SDNEWSYMS;
-  FX_DWORD* SDNEWSYMWIDTHS;
-  FX_DWORD HCHEIGHT, NSYMSDECODED;
-  int32_t HCDH;
-  FX_DWORD SYMWIDTH, TOTWIDTH, HCFIRSTSYM;
-  int32_t DW;
-  CJBig2_Image *BS, *BHC;
-  FX_DWORD I, J, REFAGGNINST;
-  FX_BOOL* EXFLAGS;
-  FX_DWORD EXINDEX;
-  FX_BOOL CUREXFLAG;
-  FX_DWORD EXRUNLENGTH;
-  int32_t nVal, nBits;
-  FX_DWORD nTmp;
-  FX_DWORD SBNUMSYMS;
-  uint8_t SBSYMCODELEN;
-  JBig2HuffmanCode* SBSYMCODES;
-  FX_DWORD IDI;
-  int32_t RDXI, RDYI;
-  FX_DWORD BMSIZE;
-  FX_DWORD stride;
-  CJBig2_Image** SBSYMS;
-  nonstd::unique_ptr<CJBig2_HuffmanDecoder> pHuffmanDecoder(
-      new CJBig2_HuffmanDecoder(pStream));
-  SDNEWSYMS = FX_Alloc(CJBig2_Image*, SDNUMNEWSYMS);
-  FXSYS_memset(SDNEWSYMS, 0, SDNUMNEWSYMS * sizeof(CJBig2_Image*));
-  SDNEWSYMWIDTHS = nullptr;
-  BHC = nullptr;
-  if (SDREFAGG == 0) {
-    SDNEWSYMWIDTHS = FX_Alloc(FX_DWORD, SDNUMNEWSYMS);
-    FXSYS_memset(SDNEWSYMWIDTHS, 0, SDNUMNEWSYMS * sizeof(FX_DWORD));
-  }
-  nonstd::unique_ptr<CJBig2_SymbolDict> pDict(new CJBig2_SymbolDict());
-  nonstd::unique_ptr<CJBig2_HuffmanTable> pTable;
-
-  HCHEIGHT = 0;
-  NSYMSDECODED = 0;
-  BS = nullptr;
-  while (NSYMSDECODED < SDNUMNEWSYMS) {
-    if (pHuffmanDecoder->decodeAValue(SDHUFFDH, &HCDH) != 0) {
-      goto failed;
-    }
-    HCHEIGHT = HCHEIGHT + HCDH;
-    if ((int)HCHEIGHT < 0 || (int)HCHEIGHT > JBIG2_MAX_IMAGE_SIZE) {
-      goto failed;
-    }
-    SYMWIDTH = 0;
-    TOTWIDTH = 0;
-    HCFIRSTSYM = NSYMSDECODED;
-    for (;;) {
-      nVal = pHuffmanDecoder->decodeAValue(SDHUFFDW, &DW);
-      if (nVal == JBIG2_OOB) {
-        break;
-      } else if (nVal != 0) {
-        goto failed;
-      } else {
-        if (NSYMSDECODED >= SDNUMNEWSYMS) {
-          goto failed;
-        }
-        SYMWIDTH = SYMWIDTH + DW;
-        if ((int)SYMWIDTH < 0 || (int)SYMWIDTH > JBIG2_MAX_IMAGE_SIZE) {
-          goto failed;
-        } else if (HCHEIGHT == 0 || SYMWIDTH == 0) {
-          TOTWIDTH = TOTWIDTH + SYMWIDTH;
-          SDNEWSYMS[NSYMSDECODED] = nullptr;
-          NSYMSDECODED = NSYMSDECODED + 1;
-          continue;
-        }
-        TOTWIDTH = TOTWIDTH + SYMWIDTH;
-      }
-      if (SDREFAGG == 1) {
-        if (pHuffmanDecoder->decodeAValue(SDHUFFAGGINST, (int*)&REFAGGNINST) !=
-            0) {
-          goto failed;
-        }
-        BS = nullptr;
-        if (REFAGGNINST > 1) {
-          nonstd::unique_ptr<CJBig2_TRDProc> pDecoder(new CJBig2_TRDProc());
-          pDecoder->SBHUFF = SDHUFF;
-          pDecoder->SBREFINE = 1;
-          pDecoder->SBW = SYMWIDTH;
-          pDecoder->SBH = HCHEIGHT;
-          pDecoder->SBNUMINSTANCES = REFAGGNINST;
-          pDecoder->SBSTRIPS = 1;
-          pDecoder->SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
-          SBNUMSYMS = pDecoder->SBNUMSYMS;
-          SBSYMCODES = FX_Alloc(JBig2HuffmanCode, SBNUMSYMS);
-          nTmp = 1;
-          while ((FX_DWORD)(1 << nTmp) < SBNUMSYMS) {
-            nTmp++;
-          }
-          for (I = 0; I < SBNUMSYMS; I++) {
-            SBSYMCODES[I].codelen = nTmp;
-            SBSYMCODES[I].code = I;
-          }
-          pDecoder->SBSYMCODES = SBSYMCODES;
-          SBSYMS = FX_Alloc(CJBig2_Image*, SBNUMSYMS);
-          JBIG2_memcpy(SBSYMS, SDINSYMS, SDNUMINSYMS * sizeof(CJBig2_Image*));
-          JBIG2_memcpy(SBSYMS + SDNUMINSYMS, SDNEWSYMS,
-                       NSYMSDECODED * sizeof(CJBig2_Image*));
-          pDecoder->SBSYMS = SBSYMS;
-          pDecoder->SBDEFPIXEL = 0;
-          pDecoder->SBCOMBOP = JBIG2_COMPOSE_OR;
-          pDecoder->TRANSPOSED = 0;
-          pDecoder->REFCORNER = JBIG2_CORNER_TOPLEFT;
-          pDecoder->SBDSOFFSET = 0;
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFFS(
-              new CJBig2_HuffmanTable(HuffmanTable_B6,
-                                      FX_ArraySize(HuffmanTable_B6),
-                                      HuffmanTable_HTOOB_B6));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFDS(
-              new CJBig2_HuffmanTable(HuffmanTable_B8,
-                                      FX_ArraySize(HuffmanTable_B8),
-                                      HuffmanTable_HTOOB_B8));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFDT(
-              new CJBig2_HuffmanTable(HuffmanTable_B11,
-                                      FX_ArraySize(HuffmanTable_B11),
-                                      HuffmanTable_HTOOB_B11));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDW(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDH(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDX(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDY(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRSIZE(
-              new CJBig2_HuffmanTable(HuffmanTable_B1,
-                                      FX_ArraySize(HuffmanTable_B1),
-                                      HuffmanTable_HTOOB_B1));
-          pDecoder->SBHUFFFS = SBHUFFFS.get();
-          pDecoder->SBHUFFDS = SBHUFFDS.get();
-          pDecoder->SBHUFFDT = SBHUFFDT.get();
-          pDecoder->SBHUFFRDW = SBHUFFRDW.get();
-          pDecoder->SBHUFFRDH = SBHUFFRDH.get();
-          pDecoder->SBHUFFRDX = SBHUFFRDX.get();
-          pDecoder->SBHUFFRDY = SBHUFFRDY.get();
-          pDecoder->SBHUFFRSIZE = SBHUFFRSIZE.get();
-          pDecoder->SBRTEMPLATE = SDRTEMPLATE;
-          pDecoder->SBRAT[0] = SDRAT[0];
-          pDecoder->SBRAT[1] = SDRAT[1];
-          pDecoder->SBRAT[2] = SDRAT[2];
-          pDecoder->SBRAT[3] = SDRAT[3];
-          BS = pDecoder->decode_Huffman(pStream, grContext);
-          if (!BS) {
-            FX_Free(SBSYMCODES);
-            FX_Free(SBSYMS);
-            goto failed;
-          }
-          FX_Free(SBSYMCODES);
-          FX_Free(SBSYMS);
-        } else if (REFAGGNINST == 1) {
-          SBNUMSYMS = SDNUMINSYMS + SDNUMNEWSYMS;
-          nTmp = 1;
-          while ((FX_DWORD)(1 << nTmp) < SBNUMSYMS) {
-            nTmp++;
-          }
-          SBSYMCODELEN = (uint8_t)nTmp;
-          SBSYMCODES = FX_Alloc(JBig2HuffmanCode, SBNUMSYMS);
-          for (I = 0; I < SBNUMSYMS; I++) {
-            SBSYMCODES[I].codelen = SBSYMCODELEN;
-            SBSYMCODES[I].code = I;
-          }
-          nVal = 0;
-          nBits = 0;
-          for (;;) {
-            if (pStream->read1Bit(&nTmp) != 0) {
-              FX_Free(SBSYMCODES);
-              goto failed;
-            }
-            nVal = (nVal << 1) | nTmp;
-            for (IDI = 0; IDI < SBNUMSYMS; IDI++) {
-              if ((nVal == SBSYMCODES[IDI].code) &&
-                  (nBits == SBSYMCODES[IDI].codelen)) {
-                break;
-              }
-            }
-            if (IDI < SBNUMSYMS) {
-              break;
-            }
-          }
-          FX_Free(SBSYMCODES);
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDX(
-              new CJBig2_HuffmanTable(HuffmanTable_B15,
-                                      FX_ArraySize(HuffmanTable_B15),
-                                      HuffmanTable_HTOOB_B15));
-          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRSIZE(
-              new CJBig2_HuffmanTable(HuffmanTable_B1,
-                                      FX_ArraySize(HuffmanTable_B1),
-                                      HuffmanTable_HTOOB_B1));
-          if ((pHuffmanDecoder->decodeAValue(SBHUFFRDX.get(), &RDXI) != 0) ||
-              (pHuffmanDecoder->decodeAValue(SBHUFFRDX.get(), &RDYI) != 0) ||
-              (pHuffmanDecoder->decodeAValue(SBHUFFRSIZE.get(), &nVal) != 0)) {
-            goto failed;
-          }
-          pStream->alignByte();
-          nTmp = pStream->getOffset();
-          SBSYMS = FX_Alloc(CJBig2_Image*, SBNUMSYMS);
-          JBIG2_memcpy(SBSYMS, SDINSYMS, SDNUMINSYMS * sizeof(CJBig2_Image*));
-          JBIG2_memcpy(SBSYMS + SDNUMINSYMS, SDNEWSYMS,
-                       NSYMSDECODED * sizeof(CJBig2_Image*));
-          nonstd::unique_ptr<CJBig2_GRRDProc> pGRRD(new CJBig2_GRRDProc());
-          pGRRD->GRW = SYMWIDTH;
-          pGRRD->GRH = HCHEIGHT;
-          pGRRD->GRTEMPLATE = SDRTEMPLATE;
-          pGRRD->GRREFERENCE = SBSYMS[IDI];
-          pGRRD->GRREFERENCEDX = RDXI;
-          pGRRD->GRREFERENCEDY = RDYI;
-          pGRRD->TPGRON = 0;
-          pGRRD->GRAT[0] = SDRAT[0];
-          pGRRD->GRAT[1] = SDRAT[1];
-          pGRRD->GRAT[2] = SDRAT[2];
-          pGRRD->GRAT[3] = SDRAT[3];
-          nonstd::unique_ptr<CJBig2_ArithDecoder> pArithDecoder(
-              new CJBig2_ArithDecoder(pStream));
-          BS = pGRRD->decode(pArithDecoder.get(), grContext);
-          if (!BS) {
-            FX_Free(SBSYMS);
-            goto failed;
-          }
-          pStream->alignByte();
-          pStream->offset(2);
-          if ((FX_DWORD)nVal != (pStream->getOffset() - nTmp)) {
-            delete BS;
-            FX_Free(SBSYMS);
-            goto failed;
-          }
-          FX_Free(SBSYMS);
-        }
-        SDNEWSYMS[NSYMSDECODED] = BS;
-      }
-      if (SDREFAGG == 0) {
-        SDNEWSYMWIDTHS[NSYMSDECODED] = SYMWIDTH;
-      }
-      NSYMSDECODED = NSYMSDECODED + 1;
-    }
-    if (SDREFAGG == 0) {
-      if (pHuffmanDecoder->decodeAValue(SDHUFFBMSIZE, (int32_t*)&BMSIZE) != 0) {
-        goto failed;
-      }
-      pStream->alignByte();
-      if (BMSIZE == 0) {
-        stride = (TOTWIDTH + 7) >> 3;
-        if (pStream->getByteLeft() >= stride * HCHEIGHT) {
-          BHC = new CJBig2_Image(TOTWIDTH, HCHEIGHT);
-          for (I = 0; I < HCHEIGHT; I++) {
-            JBIG2_memcpy(BHC->m_pData + I * BHC->m_nStride,
-                         pStream->getPointer(), stride);
-            pStream->offset(stride);
-          }
-        } else {
-          goto failed;
-        }
-      } else {
-        nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
-        pGRD->MMR = 1;
-        pGRD->GBW = TOTWIDTH;
-        pGRD->GBH = HCHEIGHT;
-        FXCODEC_STATUS status = pGRD->Start_decode_MMR(&BHC, pStream);
-        while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
-          pGRD->Continue_decode(pPause);
-        }
-        pStream->alignByte();
-      }
-      nTmp = 0;
-      if (!BHC) {
-        continue;
-      }
-      for (I = HCFIRSTSYM; I < NSYMSDECODED; I++) {
-        SDNEWSYMS[I] = BHC->subImage(nTmp, 0, SDNEWSYMWIDTHS[I], HCHEIGHT);
-        nTmp += SDNEWSYMWIDTHS[I];
-      }
-      delete BHC;
-      BHC = nullptr;
-    }
-  }
-  EXINDEX = 0;
-  CUREXFLAG = 0;
-  pTable.reset(new CJBig2_HuffmanTable(
-      HuffmanTable_B1, FX_ArraySize(HuffmanTable_B1), HuffmanTable_HTOOB_B1));
-  EXFLAGS = FX_Alloc(FX_BOOL, SDNUMINSYMS + SDNUMNEWSYMS);
-  while (EXINDEX < SDNUMINSYMS + SDNUMNEWSYMS) {
-    if (pHuffmanDecoder->decodeAValue(pTable.get(), (int*)&EXRUNLENGTH) != 0) {
-      FX_Free(EXFLAGS);
-      goto failed;
-    }
-    if (EXINDEX + EXRUNLENGTH > SDNUMINSYMS + SDNUMNEWSYMS) {
-      FX_Free(EXFLAGS);
-      goto failed;
-    }
-    if (EXRUNLENGTH != 0) {
-      for (I = EXINDEX; I < EXINDEX + EXRUNLENGTH; I++) {
-        EXFLAGS[I] = CUREXFLAG;
-      }
-    }
-    EXINDEX = EXINDEX + EXRUNLENGTH;
-    CUREXFLAG = !CUREXFLAG;
-  }
-  pDict->SDNUMEXSYMS = SDNUMEXSYMS;
-  pDict->SDEXSYMS = FX_Alloc(CJBig2_Image*, SDNUMEXSYMS);
-  I = J = 0;
-  for (I = 0; I < SDNUMINSYMS + SDNUMNEWSYMS; I++) {
-    if (EXFLAGS[I] && J < SDNUMEXSYMS) {
-      if (I < SDNUMINSYMS) {
-        pDict->SDEXSYMS[J] = new CJBig2_Image(*SDINSYMS[I]);
-      } else {
-        pDict->SDEXSYMS[J] = SDNEWSYMS[I - SDNUMINSYMS];
-      }
-      J = J + 1;
-    } else if (!EXFLAGS[I] && I >= SDNUMINSYMS) {
-      delete SDNEWSYMS[I - SDNUMINSYMS];
-    }
-  }
-  if (J < SDNUMEXSYMS) {
-    pDict->SDNUMEXSYMS = J;
-  }
-  FX_Free(EXFLAGS);
-  FX_Free(SDNEWSYMS);
-  if (SDREFAGG == 0) {
-    FX_Free(SDNEWSYMWIDTHS);
-  }
-  return pDict.release();
-failed:
-  for (I = 0; I < NSYMSDECODED; I++) {
-    delete SDNEWSYMS[I];
-  }
-  FX_Free(SDNEWSYMS);
-  if (SDREFAGG == 0) {
-    FX_Free(SDNEWSYMWIDTHS);
-  }
-  return nullptr;
-}
-
-CJBig2_Image* CJBig2_HTRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                                            JBig2ArithCtx* gbContext,
-                                            IFX_Pause* pPause) {
-  FX_DWORD ng, mg;
-  int32_t x, y;
-  FX_DWORD HBPP;
-  FX_DWORD* GI;
-  nonstd::unique_ptr<CJBig2_Image> HSKIP;
-  nonstd::unique_ptr<CJBig2_Image> HTREG(new CJBig2_Image(HBW, HBH));
-  HTREG->fill(HDEFPIXEL);
-  if (HENABLESKIP == 1) {
-    HSKIP.reset(new CJBig2_Image(HGW, HGH));
-    for (mg = 0; mg < HGH; mg++) {
-      for (ng = 0; ng < HGW; ng++) {
-        x = (HGX + mg * HRY + ng * HRX) >> 8;
-        y = (HGY + mg * HRX - ng * HRY) >> 8;
-        if ((x + HPW <= 0) | (x >= (int32_t)HBW) | (y + HPH <= 0) |
-            (y >= (int32_t)HPH)) {
-          HSKIP->setPixel(ng, mg, 1);
-        } else {
-          HSKIP->setPixel(ng, mg, 0);
-        }
-      }
-    }
-  }
-  HBPP = 1;
-  while ((FX_DWORD)(1 << HBPP) < HNUMPATS) {
-    HBPP++;
-  }
-  nonstd::unique_ptr<CJBig2_GSIDProc> pGID(new CJBig2_GSIDProc());
-  pGID->GSMMR = HMMR;
-  pGID->GSW = HGW;
-  pGID->GSH = HGH;
-  pGID->GSBPP = (uint8_t)HBPP;
-  pGID->GSUSESKIP = HENABLESKIP;
-  pGID->GSKIP = HSKIP.get();
-  pGID->GSTEMPLATE = HTEMPLATE;
-  GI = pGID->decode_Arith(pArithDecoder, gbContext, pPause);
-  if (!GI)
-    return nullptr;
-
-  for (mg = 0; mg < HGH; mg++) {
-    for (ng = 0; ng < HGW; ng++) {
-      x = (HGX + mg * HRY + ng * HRX) >> 8;
-      y = (HGY + mg * HRX - ng * HRY) >> 8;
-      FX_DWORD pat_index = GI[mg * HGW + ng];
-      if (pat_index >= HNUMPATS) {
-        pat_index = HNUMPATS - 1;
-      }
-      HTREG->composeFrom(x, y, HPATS[pat_index], HCOMBOP);
-    }
-  }
-  FX_Free(GI);
-  return HTREG.release();
-}
-
-CJBig2_Image* CJBig2_HTRDProc::decode_MMR(CJBig2_BitStream* pStream,
-                                          IFX_Pause* pPause) {
-  FX_DWORD ng, mg;
-  int32_t x, y;
-  FX_DWORD* GI;
-  nonstd::unique_ptr<CJBig2_Image> HTREG(new CJBig2_Image(HBW, HBH));
-  HTREG->fill(HDEFPIXEL);
-  FX_DWORD HBPP = 1;
-  while ((FX_DWORD)(1 << HBPP) < HNUMPATS) {
-    HBPP++;
-  }
-  nonstd::unique_ptr<CJBig2_GSIDProc> pGID(new CJBig2_GSIDProc());
-  pGID->GSMMR = HMMR;
-  pGID->GSW = HGW;
-  pGID->GSH = HGH;
-  pGID->GSBPP = (uint8_t)HBPP;
-  pGID->GSUSESKIP = 0;
-  GI = pGID->decode_MMR(pStream, pPause);
-  if (!GI)
-    return nullptr;
-
-  for (mg = 0; mg < HGH; mg++) {
-    for (ng = 0; ng < HGW; ng++) {
-      x = (HGX + mg * HRY + ng * HRX) >> 8;
-      y = (HGY + mg * HRX - ng * HRY) >> 8;
-      FX_DWORD pat_index = GI[mg * HGW + ng];
-      if (pat_index >= HNUMPATS) {
-        pat_index = HNUMPATS - 1;
-      }
-      HTREG->composeFrom(x, y, HPATS[pat_index], HCOMBOP);
-    }
-  }
-  FX_Free(GI);
-  return HTREG.release();
-}
-
-CJBig2_PatternDict* CJBig2_PDDProc::decode_Arith(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_DWORD GRAY;
-  CJBig2_Image* BHDC = nullptr;
-  nonstd::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict());
-  pDict->NUMPATS = GRAYMAX + 1;
-  pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS);
-  JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS);
-
-  nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
-  pGRD->MMR = HDMMR;
-  pGRD->GBW = (GRAYMAX + 1) * HDPW;
-  pGRD->GBH = HDPH;
-  pGRD->GBTEMPLATE = HDTEMPLATE;
-  pGRD->TPGDON = 0;
-  pGRD->USESKIP = 0;
-  pGRD->GBAT[0] = -(int32_t)HDPW;
-  pGRD->GBAT[1] = 0;
-  if (pGRD->GBTEMPLATE == 0) {
-    pGRD->GBAT[2] = -3;
-    pGRD->GBAT[3] = -1;
-    pGRD->GBAT[4] = 2;
-    pGRD->GBAT[5] = -2;
-    pGRD->GBAT[6] = -2;
-    pGRD->GBAT[7] = -2;
-  }
-  FXCODEC_STATUS status =
-      pGRD->Start_decode_Arith(&BHDC, pArithDecoder, gbContext);
-  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
-    pGRD->Continue_decode(pPause);
-  }
-  if (!BHDC)
-    return nullptr;
-
-  GRAY = 0;
-  while (GRAY <= GRAYMAX) {
-    pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH);
-    GRAY = GRAY + 1;
-  }
-  delete BHDC;
-  return pDict.release();
-}
-
-CJBig2_PatternDict* CJBig2_PDDProc::decode_MMR(CJBig2_BitStream* pStream,
-                                               IFX_Pause* pPause) {
-  FX_DWORD GRAY;
-  CJBig2_Image* BHDC = nullptr;
-  nonstd::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict());
-  pDict->NUMPATS = GRAYMAX + 1;
-  pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS);
-  JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS);
-
-  nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
-  pGRD->MMR = HDMMR;
-  pGRD->GBW = (GRAYMAX + 1) * HDPW;
-  pGRD->GBH = HDPH;
-  FXCODEC_STATUS status = pGRD->Start_decode_MMR(&BHDC, pStream);
-  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
-    pGRD->Continue_decode(pPause);
-  }
-  if (!BHDC)
-    return nullptr;
-
-  GRAY = 0;
-  while (GRAY <= GRAYMAX) {
-    pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH);
-    GRAY = GRAY + 1;
-  }
-  delete BHDC;
-  return pDict.release();
-}
-
-FX_DWORD* CJBig2_GSIDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                                        JBig2ArithCtx* gbContext,
-                                        IFX_Pause* pPause) {
-  CJBig2_Image** GSPLANES;
-  int32_t J, K;
-  FX_DWORD x, y;
-  FX_DWORD* GSVALS;
-  GSPLANES = FX_Alloc(CJBig2_Image*, GSBPP);
-  GSVALS = FX_Alloc2D(FX_DWORD, GSW, GSH);
-  JBIG2_memset(GSPLANES, 0, sizeof(CJBig2_Image*) * GSBPP);
-  JBIG2_memset(GSVALS, 0, sizeof(FX_DWORD) * GSW * GSH);
-
-  nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
-  pGRD->MMR = GSMMR;
-  pGRD->GBW = GSW;
-  pGRD->GBH = GSH;
-  pGRD->GBTEMPLATE = GSTEMPLATE;
-  pGRD->TPGDON = 0;
-  pGRD->USESKIP = GSUSESKIP;
-  pGRD->SKIP = GSKIP;
-  if (GSTEMPLATE <= 1) {
-    pGRD->GBAT[0] = 3;
-  } else {
-    pGRD->GBAT[0] = 2;
-  }
-  pGRD->GBAT[1] = -1;
-  if (pGRD->GBTEMPLATE == 0) {
-    pGRD->GBAT[2] = -3;
-    pGRD->GBAT[3] = -1;
-    pGRD->GBAT[4] = 2;
-    pGRD->GBAT[5] = -2;
-    pGRD->GBAT[6] = -2;
-    pGRD->GBAT[7] = -2;
-  }
-  FXCODEC_STATUS status =
-      pGRD->Start_decode_Arith(&GSPLANES[GSBPP - 1], pArithDecoder, gbContext);
-  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
-    pGRD->Continue_decode(pPause);
-  }
-  if (!GSPLANES[GSBPP - 1]) {
-    goto failed;
-  }
-  J = GSBPP - 2;
-  while (J >= 0) {
-    FXCODEC_STATUS status =
-        pGRD->Start_decode_Arith(&GSPLANES[J], pArithDecoder, gbContext);
-    while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
-      pGRD->Continue_decode(pPause);
-    }
-    if (!GSPLANES[J]) {
-      for (K = GSBPP - 1; K > J; K--) {
-        delete GSPLANES[K];
-        goto failed;
-      }
-    }
-    GSPLANES[J]->composeFrom(0, 0, GSPLANES[J + 1], JBIG2_COMPOSE_XOR);
-    J = J - 1;
-  }
-  for (y = 0; y < GSH; y++) {
-    for (x = 0; x < GSW; x++) {
-      for (J = 0; J < GSBPP; J++) {
-        GSVALS[y * GSW + x] |= GSPLANES[J]->getPixel(x, y) << J;
-      }
-    }
-  }
-  for (J = 0; J < GSBPP; J++) {
-    delete GSPLANES[J];
-  }
-  FX_Free(GSPLANES);
-  return GSVALS;
-failed:
-  FX_Free(GSPLANES);
-  FX_Free(GSVALS);
-  return nullptr;
-}
-
-FX_DWORD* CJBig2_GSIDProc::decode_MMR(CJBig2_BitStream* pStream,
-                                      IFX_Pause* pPause) {
-  CJBig2_Image** GSPLANES;
-  int32_t J, K;
-  FX_DWORD x, y;
-  FX_DWORD* GSVALS;
-  GSPLANES = FX_Alloc(CJBig2_Image*, GSBPP);
-  GSVALS = FX_Alloc2D(FX_DWORD, GSW, GSH);
-  JBIG2_memset(GSPLANES, 0, sizeof(CJBig2_Image*) * GSBPP);
-  JBIG2_memset(GSVALS, 0, sizeof(FX_DWORD) * GSW * GSH);
-
-  nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
-  pGRD->MMR = GSMMR;
-  pGRD->GBW = GSW;
-  pGRD->GBH = GSH;
-  FXCODEC_STATUS status = pGRD->Start_decode_MMR(&GSPLANES[GSBPP - 1], pStream);
-  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
-    pGRD->Continue_decode(pPause);
-  }
-  if (!GSPLANES[GSBPP - 1]) {
-    goto failed;
-  }
-  pStream->alignByte();
-  pStream->offset(3);
-  J = GSBPP - 2;
-  while (J >= 0) {
-    FXCODEC_STATUS status = pGRD->Start_decode_MMR(&GSPLANES[J], pStream);
-    while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
-      pGRD->Continue_decode(pPause);
-    }
-    if (!GSPLANES[J]) {
-      for (K = GSBPP - 1; K > J; K--) {
-        delete GSPLANES[K];
-        goto failed;
-      }
-    }
-    pStream->alignByte();
-    pStream->offset(3);
-    GSPLANES[J]->composeFrom(0, 0, GSPLANES[J + 1], JBIG2_COMPOSE_XOR);
-    J = J - 1;
-  }
-  for (y = 0; y < GSH; y++) {
-    for (x = 0; x < GSW; x++) {
-      for (J = 0; J < GSBPP; J++) {
-        GSVALS[y * GSW + x] |= GSPLANES[J]->getPixel(x, y) << J;
-      }
-    }
-  }
-  for (J = 0; J < GSBPP; J++) {
-    delete GSPLANES[J];
-  }
-  FX_Free(GSPLANES);
-  return GSVALS;
-failed:
-  FX_Free(GSPLANES);
-  FX_Free(GSVALS);
-  return nullptr;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::Start_decode_Arith(
-    CJBig2_Image** pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  if (GBW == 0 || GBH == 0) {
-    m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-    return FXCODEC_STATUS_DECODE_FINISH;
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_READY;
-  m_pPause = pPause;
-  if (!*pImage)
-    *pImage = new CJBig2_Image(GBW, GBH);
-  if (!(*pImage)->m_pData) {
-    delete *pImage;
-    *pImage = nullptr;
-    m_ProssiveStatus = FXCODEC_STATUS_ERROR;
-    return FXCODEC_STATUS_ERROR;
-  }
-  m_DecodeType = 1;
-  m_pImage = pImage;
-  (*m_pImage)->fill(0);
-  m_pArithDecoder = pArithDecoder;
-  m_gbContext = gbContext;
-  LTP = 0;
-  m_pLine = nullptr;
-  m_loopIndex = 0;
-  return decode_Arith(pPause);
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith(IFX_Pause* pPause) {
-  int iline = m_loopIndex;
-  CJBig2_Image* pImage = *m_pImage;
-  if (GBTEMPLATE == 0) {
-    if (UseTemplate0Opt3()) {
-      m_ProssiveStatus = decode_Arith_Template0_opt3(pImage, m_pArithDecoder,
-                                                     m_gbContext, pPause);
-    } else {
-      m_ProssiveStatus = decode_Arith_Template0_unopt(pImage, m_pArithDecoder,
-                                                      m_gbContext, pPause);
-    }
-  } else if (GBTEMPLATE == 1) {
-    if (UseTemplate1Opt3()) {
-      m_ProssiveStatus = decode_Arith_Template1_opt3(pImage, m_pArithDecoder,
-                                                     m_gbContext, pPause);
-    } else {
-      m_ProssiveStatus = decode_Arith_Template1_unopt(pImage, m_pArithDecoder,
-                                                      m_gbContext, pPause);
-    }
-  } else if (GBTEMPLATE == 2) {
-    if (UseTemplate23Opt3()) {
-      m_ProssiveStatus = decode_Arith_Template2_opt3(pImage, m_pArithDecoder,
-                                                     m_gbContext, pPause);
-    } else {
-      m_ProssiveStatus = decode_Arith_Template2_unopt(pImage, m_pArithDecoder,
-                                                      m_gbContext, pPause);
-    }
-  } else {
-    if (UseTemplate23Opt3()) {
-      m_ProssiveStatus = decode_Arith_Template3_opt3(pImage, m_pArithDecoder,
-                                                     m_gbContext, pPause);
-    } else {
-      m_ProssiveStatus = decode_Arith_Template3_unopt(pImage, m_pArithDecoder,
-                                                      m_gbContext, pPause);
-    }
-  }
-  m_ReplaceRect.left = 0;
-  m_ReplaceRect.right = pImage->m_nWidth;
-  m_ReplaceRect.top = iline;
-  m_ReplaceRect.bottom = m_loopIndex;
-  if (m_ProssiveStatus == FXCODEC_STATUS_DECODE_FINISH) {
-    m_loopIndex = 0;
-  }
-  return m_ProssiveStatus;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::Start_decode_MMR(CJBig2_Image** pImage,
-                                                CJBig2_BitStream* pStream,
-                                                IFX_Pause* pPause) {
-  int bitpos, i;
-  *pImage = new CJBig2_Image(GBW, GBH);
-  if (!(*pImage)->m_pData) {
-    delete (*pImage);
-    (*pImage) = nullptr;
-    m_ProssiveStatus = FXCODEC_STATUS_ERROR;
-    return m_ProssiveStatus;
-  }
-  bitpos = (int)pStream->getBitPos();
-  _FaxG4Decode(pStream->getBuf(), pStream->getLength(), &bitpos,
-               (*pImage)->m_pData, GBW, GBH, (*pImage)->m_nStride);
-  pStream->setBitPos(bitpos);
-  for (i = 0; (FX_DWORD)i < (*pImage)->m_nStride * GBH; i++) {
-    (*pImage)->m_pData[i] = ~(*pImage)->m_pData[i];
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return m_ProssiveStatus;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::Continue_decode(IFX_Pause* pPause) {
-  if (m_ProssiveStatus != FXCODEC_STATUS_DECODE_TOBECONTINUE)
-    return m_ProssiveStatus;
-
-  if (m_DecodeType != 1) {
-    m_ProssiveStatus = FXCODEC_STATUS_ERROR;
-    return m_ProssiveStatus;
-  }
-
-  return decode_Arith(pPause);
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template0_opt3(
-    CJBig2_Image* pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_BOOL SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2;
-  uint8_t *pLine1, *pLine2, cVal;
-  int32_t nStride, nStride2, k;
-  int32_t nLineBytes, nBitsLeft, cc;
-  if (!m_pLine) {
-    m_pLine = pImage->m_pData;
-  }
-  nStride = pImage->m_nStride;
-  nStride2 = nStride << 1;
-  nLineBytes = ((GBW + 7) >> 3) - 1;
-  nBitsLeft = GBW - (nLineBytes << 3);
-  FX_DWORD height = GBH & 0x7fffffff;
-  for (; m_loopIndex < height; m_loopIndex++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x9b25]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
-    } else {
-      if (m_loopIndex > 1) {
-        pLine1 = m_pLine - nStride2;
-        pLine2 = m_pLine - nStride;
-        line1 = (*pLine1++) << 6;
-        line2 = *pLine2++;
-        CONTEXT = ((line1 & 0xf800) | (line2 & 0x07f0));
-        for (cc = 0; cc < nLineBytes; cc++) {
-          line1 = (line1 << 8) | ((*pLine1++) << 6);
-          line2 = (line2 << 8) | (*pLine2++);
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
-                       ((line1 >> k) & 0x0800) | ((line2 >> k) & 0x0010));
-          }
-          m_pLine[cc] = cVal;
-        }
-        line1 <<= 8;
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT =
-              (((CONTEXT & 0x7bf7) << 1) | bVal |
-               ((line1 >> (7 - k)) & 0x0800) | ((line2 >> (7 - k)) & 0x0010));
-        }
-        m_pLine[nLineBytes] = cVal;
-      } else {
-        pLine2 = m_pLine - nStride;
-        line2 = (m_loopIndex & 1) ? (*pLine2++) : 0;
-        CONTEXT = (line2 & 0x07f0);
-        for (cc = 0; cc < nLineBytes; cc++) {
-          if (m_loopIndex & 1) {
-            line2 = (line2 << 8) | (*pLine2++);
-          }
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT =
-                (((CONTEXT & 0x7bf7) << 1) | bVal | ((line2 >> k) & 0x0010));
-          }
-          m_pLine[cc] = cVal;
-        }
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
-                     ((line2 >> (7 - k)) & 0x0010));
-        }
-        m_pLine[nLineBytes] = cVal;
-      }
-    }
-    m_pLine += nStride;
-    if (pPause && pPause->NeedToPauseNow()) {
-      m_loopIndex++;
-      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    }
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return FXCODEC_STATUS_DECODE_FINISH;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template0_unopt(
-    CJBig2_Image* pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_BOOL SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2, line3;
-  for (; m_loopIndex < GBH; m_loopIndex++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x9b25]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
-    } else {
-      line1 = pImage->getPixel(1, m_loopIndex - 2);
-      line1 |= pImage->getPixel(0, m_loopIndex - 2) << 1;
-      line2 = pImage->getPixel(2, m_loopIndex - 1);
-      line2 |= pImage->getPixel(1, m_loopIndex - 1) << 1;
-      line2 |= pImage->getPixel(0, m_loopIndex - 1) << 2;
-      line3 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, m_loopIndex)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line3;
-          CONTEXT |= pImage->getPixel(w + GBAT[0], m_loopIndex + GBAT[1]) << 4;
-          CONTEXT |= line2 << 5;
-          CONTEXT |= pImage->getPixel(w + GBAT[2], m_loopIndex + GBAT[3]) << 10;
-          CONTEXT |= pImage->getPixel(w + GBAT[4], m_loopIndex + GBAT[5]) << 11;
-          CONTEXT |= line1 << 12;
-          CONTEXT |= pImage->getPixel(w + GBAT[6], m_loopIndex + GBAT[7]) << 15;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          pImage->setPixel(w, m_loopIndex, bVal);
-        }
-        line1 =
-            ((line1 << 1) | pImage->getPixel(w + 2, m_loopIndex - 2)) & 0x07;
-        line2 =
-            ((line2 << 1) | pImage->getPixel(w + 3, m_loopIndex - 1)) & 0x1f;
-        line3 = ((line3 << 1) | bVal) & 0x0f;
-      }
-    }
-    if (pPause && pPause->NeedToPauseNow()) {
-      m_loopIndex++;
-      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    }
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return FXCODEC_STATUS_DECODE_FINISH;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template1_opt3(
-    CJBig2_Image* pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_BOOL SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2;
-  uint8_t *pLine1, *pLine2, cVal;
-  int32_t nStride, nStride2, k;
-  int32_t nLineBytes, nBitsLeft, cc;
-  if (!m_pLine) {
-    m_pLine = pImage->m_pData;
-  }
-  nStride = pImage->m_nStride;
-  nStride2 = nStride << 1;
-  nLineBytes = ((GBW + 7) >> 3) - 1;
-  nBitsLeft = GBW - (nLineBytes << 3);
-  for (; m_loopIndex < GBH; m_loopIndex++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x0795]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
-    } else {
-      if (m_loopIndex > 1) {
-        pLine1 = m_pLine - nStride2;
-        pLine2 = m_pLine - nStride;
-        line1 = (*pLine1++) << 4;
-        line2 = *pLine2++;
-        CONTEXT = (line1 & 0x1e00) | ((line2 >> 1) & 0x01f8);
-        for (cc = 0; cc < nLineBytes; cc++) {
-          line1 = (line1 << 8) | ((*pLine1++) << 4);
-          line2 = (line2 << 8) | (*pLine2++);
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
-                      ((line1 >> k) & 0x0200) | ((line2 >> (k + 1)) & 0x0008);
-          }
-          m_pLine[cc] = cVal;
-        }
-        line1 <<= 8;
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
-                    ((line1 >> (7 - k)) & 0x0200) |
-                    ((line2 >> (8 - k)) & 0x0008);
-        }
-        m_pLine[nLineBytes] = cVal;
-      } else {
-        pLine2 = m_pLine - nStride;
-        line2 = (m_loopIndex & 1) ? (*pLine2++) : 0;
-        CONTEXT = (line2 >> 1) & 0x01f8;
-        for (cc = 0; cc < nLineBytes; cc++) {
-          if (m_loopIndex & 1) {
-            line2 = (line2 << 8) | (*pLine2++);
-          }
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
-                      ((line2 >> (k + 1)) & 0x0008);
-          }
-          m_pLine[cc] = cVal;
-        }
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT =
-              ((CONTEXT & 0x0efb) << 1) | bVal | ((line2 >> (8 - k)) & 0x0008);
-        }
-        m_pLine[nLineBytes] = cVal;
-      }
-    }
-    m_pLine += nStride;
-    if (pPause && pPause->NeedToPauseNow()) {
-      m_loopIndex++;
-      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    }
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return FXCODEC_STATUS_DECODE_FINISH;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template1_unopt(
-    CJBig2_Image* pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_BOOL SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2, line3;
-  for (FX_DWORD h = 0; h < GBH; h++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x0795]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      pImage->copyLine(h, h - 1);
-    } else {
-      line1 = pImage->getPixel(2, h - 2);
-      line1 |= pImage->getPixel(1, h - 2) << 1;
-      line1 |= pImage->getPixel(0, h - 2) << 2;
-      line2 = pImage->getPixel(2, h - 1);
-      line2 |= pImage->getPixel(1, h - 1) << 1;
-      line2 |= pImage->getPixel(0, h - 1) << 2;
-      line3 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, h)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line3;
-          CONTEXT |= pImage->getPixel(w + GBAT[0], h + GBAT[1]) << 3;
-          CONTEXT |= line2 << 4;
-          CONTEXT |= line1 << 9;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          pImage->setPixel(w, h, bVal);
-        }
-        line1 = ((line1 << 1) | pImage->getPixel(w + 3, h - 2)) & 0x0f;
-        line2 = ((line2 << 1) | pImage->getPixel(w + 3, h - 1)) & 0x1f;
-        line3 = ((line3 << 1) | bVal) & 0x07;
-      }
-    }
-    if (pPause && pPause->NeedToPauseNow()) {
-      m_loopIndex++;
-      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    }
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return FXCODEC_STATUS_DECODE_FINISH;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template2_opt3(
-    CJBig2_Image* pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_BOOL SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2;
-  uint8_t *pLine1, *pLine2, cVal;
-  int32_t nStride, nStride2, k;
-  int32_t nLineBytes, nBitsLeft, cc;
-  if (!m_pLine) {
-    m_pLine = pImage->m_pData;
-  }
-  nStride = pImage->m_nStride;
-  nStride2 = nStride << 1;
-  nLineBytes = ((GBW + 7) >> 3) - 1;
-  nBitsLeft = GBW - (nLineBytes << 3);
-  for (; m_loopIndex < GBH; m_loopIndex++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x00e5]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
-    } else {
-      if (m_loopIndex > 1) {
-        pLine1 = m_pLine - nStride2;
-        pLine2 = m_pLine - nStride;
-        line1 = (*pLine1++) << 1;
-        line2 = *pLine2++;
-        CONTEXT = (line1 & 0x0380) | ((line2 >> 3) & 0x007c);
-        for (cc = 0; cc < nLineBytes; cc++) {
-          line1 = (line1 << 8) | ((*pLine1++) << 1);
-          line2 = (line2 << 8) | (*pLine2++);
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                      ((line1 >> k) & 0x0080) | ((line2 >> (k + 3)) & 0x0004);
-          }
-          m_pLine[cc] = cVal;
-        }
-        line1 <<= 8;
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                    ((line1 >> (7 - k)) & 0x0080) |
-                    ((line2 >> (10 - k)) & 0x0004);
-        }
-        m_pLine[nLineBytes] = cVal;
-      } else {
-        pLine2 = m_pLine - nStride;
-        line2 = (m_loopIndex & 1) ? (*pLine2++) : 0;
-        CONTEXT = (line2 >> 3) & 0x007c;
-        for (cc = 0; cc < nLineBytes; cc++) {
-          if (m_loopIndex & 1) {
-            line2 = (line2 << 8) | (*pLine2++);
-          }
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                      ((line2 >> (k + 3)) & 0x0004);
-          }
-          m_pLine[cc] = cVal;
-        }
-        line2 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                    (((line2 >> (10 - k))) & 0x0004);
-        }
-        m_pLine[nLineBytes] = cVal;
-      }
-    }
-    m_pLine += nStride;
-    if (pPause && m_loopIndex % 50 == 0 && pPause->NeedToPauseNow()) {
-      m_loopIndex++;
-      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    }
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return FXCODEC_STATUS_DECODE_FINISH;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template2_unopt(
-    CJBig2_Image* pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_BOOL SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2, line3;
-  for (; m_loopIndex < GBH; m_loopIndex++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x00e5]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
-    } else {
-      line1 = pImage->getPixel(1, m_loopIndex - 2);
-      line1 |= pImage->getPixel(0, m_loopIndex - 2) << 1;
-      line2 = pImage->getPixel(1, m_loopIndex - 1);
-      line2 |= pImage->getPixel(0, m_loopIndex - 1) << 1;
-      line3 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, m_loopIndex)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line3;
-          CONTEXT |= pImage->getPixel(w + GBAT[0], m_loopIndex + GBAT[1]) << 2;
-          CONTEXT |= line2 << 3;
-          CONTEXT |= line1 << 7;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          pImage->setPixel(w, m_loopIndex, bVal);
-        }
-        line1 =
-            ((line1 << 1) | pImage->getPixel(w + 2, m_loopIndex - 2)) & 0x07;
-        line2 =
-            ((line2 << 1) | pImage->getPixel(w + 2, m_loopIndex - 1)) & 0x0f;
-        line3 = ((line3 << 1) | bVal) & 0x03;
-      }
-    }
-    if (pPause && pPause->NeedToPauseNow()) {
-      m_loopIndex++;
-      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    }
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return FXCODEC_STATUS_DECODE_FINISH;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template3_opt3(
-    CJBig2_Image* pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_BOOL SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1;
-  uint8_t *pLine1, cVal;
-  int32_t nStride, k;
-  int32_t nLineBytes, nBitsLeft, cc;
-  if (!m_pLine) {
-    m_pLine = pImage->m_pData;
-  }
-  nStride = pImage->m_nStride;
-  nLineBytes = ((GBW + 7) >> 3) - 1;
-  nBitsLeft = GBW - (nLineBytes << 3);
-  for (; m_loopIndex < GBH; m_loopIndex++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
-    } else {
-      if (m_loopIndex > 0) {
-        pLine1 = m_pLine - nStride;
-        line1 = *pLine1++;
-        CONTEXT = (line1 >> 1) & 0x03f0;
-        for (cc = 0; cc < nLineBytes; cc++) {
-          line1 = (line1 << 8) | (*pLine1++);
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal |
-                      ((line1 >> (k + 1)) & 0x0010);
-          }
-          m_pLine[cc] = cVal;
-        }
-        line1 <<= 8;
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT =
-              ((CONTEXT & 0x01f7) << 1) | bVal | ((line1 >> (8 - k)) & 0x0010);
-        }
-        m_pLine[nLineBytes] = cVal;
-      } else {
-        CONTEXT = 0;
-        for (cc = 0; cc < nLineBytes; cc++) {
-          cVal = 0;
-          for (k = 7; k >= 0; k--) {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-            cVal |= bVal << k;
-            CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal;
-          }
-          m_pLine[cc] = cVal;
-        }
-        cVal = 0;
-        for (k = 0; k < nBitsLeft; k++) {
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal;
-        }
-        m_pLine[nLineBytes] = cVal;
-      }
-    }
-    m_pLine += nStride;
-    if (pPause && pPause->NeedToPauseNow()) {
-      m_loopIndex++;
-      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    }
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return FXCODEC_STATUS_DECODE_FINISH;
-}
-
-FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template3_unopt(
-    CJBig2_Image* pImage,
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext,
-    IFX_Pause* pPause) {
-  FX_BOOL SLTP, bVal;
-  FX_DWORD CONTEXT;
-  FX_DWORD line1, line2;
-  for (; m_loopIndex < GBH; m_loopIndex++) {
-    if (TPGDON) {
-      SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
-      LTP = LTP ^ SLTP;
-    }
-    if (LTP == 1) {
-      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
-    } else {
-      line1 = pImage->getPixel(1, m_loopIndex - 1);
-      line1 |= pImage->getPixel(0, m_loopIndex - 1) << 1;
-      line2 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, m_loopIndex)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line2;
-          CONTEXT |= pImage->getPixel(w + GBAT[0], m_loopIndex + GBAT[1]) << 4;
-          CONTEXT |= line1 << 5;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          pImage->setPixel(w, m_loopIndex, bVal);
-        }
-        line1 =
-            ((line1 << 1) | pImage->getPixel(w + 2, m_loopIndex - 1)) & 0x1f;
-        line2 = ((line2 << 1) | bVal) & 0x0f;
-      }
-    }
-    if (pPause && pPause->NeedToPauseNow()) {
-      m_loopIndex++;
-      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    }
-  }
-  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
-  return FXCODEC_STATUS_DECODE_FINISH;
-}
diff --git a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.h b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.h
deleted file mode 100644
index a1394d342f..0000000000
--- a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.h
+++ /dev/null
@@ -1,285 +0,0 @@
-// 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 _JBIG2_GENERAL_DECODER_H_
-#define _JBIG2_GENERAL_DECODER_H_
-
-#include "../../../include/fxcodec/fx_codec_def.h"
-#include "../../../include/fxcrt/fx_coordinates.h"
-#include "JBig2_ArithDecoder.h"
-#include "JBig2_ArithIntDecoder.h"
-#include "JBig2_Define.h"
-#include "JBig2_SymbolDict.h"
-
-class CJBig2_HuffmanTable;
-class CJBig2_Image;
-class CJBig2_PatternDict;
-
-enum JBig2Corner {
-  JBIG2_CORNER_BOTTOMLEFT = 0,
-  JBIG2_CORNER_TOPLEFT = 1,
-  JBIG2_CORNER_BOTTOMRIGHT = 2,
-  JBIG2_CORNER_TOPRIGHT = 3
-};
-
-class CJBig2_GRDProc {
- public:
-  CJBig2_GRDProc() {
-    m_loopIndex = 0;
-    m_pLine = NULL;
-    m_pPause = NULL;
-    m_DecodeType = 0;
-    LTP = 0;
-    m_ReplaceRect.left = 0;
-    m_ReplaceRect.bottom = 0;
-    m_ReplaceRect.top = 0;
-    m_ReplaceRect.right = 0;
-  }
-
-  CJBig2_Image* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                             JBig2ArithCtx* gbContext);
-
-  FXCODEC_STATUS Start_decode_Arith(CJBig2_Image** pImage,
-                                    CJBig2_ArithDecoder* pArithDecoder,
-                                    JBig2ArithCtx* gbContext,
-                                    IFX_Pause* pPause = NULL);
-  FXCODEC_STATUS Start_decode_MMR(CJBig2_Image** pImage,
-                                  CJBig2_BitStream* pStream,
-                                  IFX_Pause* pPause = NULL);
-  FXCODEC_STATUS Continue_decode(IFX_Pause* pPause);
-  FX_RECT GetReplaceRect() { return m_ReplaceRect; }
-
-  FX_BOOL MMR;
-  FX_DWORD GBW;
-  FX_DWORD GBH;
-  uint8_t GBTEMPLATE;
-  FX_BOOL TPGDON;
-  FX_BOOL USESKIP;
-  CJBig2_Image* SKIP;
-  int8_t GBAT[8];
-
- private:
-  bool UseTemplate0Opt3() const;
-  bool UseTemplate1Opt3() const;
-  bool UseTemplate23Opt3() const;
-
-  FXCODEC_STATUS decode_Arith(IFX_Pause* pPause);
-  FXCODEC_STATUS decode_Arith_Template0_opt3(CJBig2_Image* pImage,
-                                             CJBig2_ArithDecoder* pArithDecoder,
-                                             JBig2ArithCtx* gbContext,
-                                             IFX_Pause* pPause);
-  FXCODEC_STATUS decode_Arith_Template0_unopt(
-      CJBig2_Image* pImage,
-      CJBig2_ArithDecoder* pArithDecoder,
-      JBig2ArithCtx* gbContext,
-      IFX_Pause* pPause);
-  FXCODEC_STATUS decode_Arith_Template1_opt3(CJBig2_Image* pImage,
-                                             CJBig2_ArithDecoder* pArithDecoder,
-                                             JBig2ArithCtx* gbContext,
-                                             IFX_Pause* pPause);
-  FXCODEC_STATUS decode_Arith_Template1_unopt(
-      CJBig2_Image* pImage,
-      CJBig2_ArithDecoder* pArithDecoder,
-      JBig2ArithCtx* gbContext,
-      IFX_Pause* pPause);
-  FXCODEC_STATUS decode_Arith_Template2_opt3(CJBig2_Image* pImage,
-                                             CJBig2_ArithDecoder* pArithDecoder,
-                                             JBig2ArithCtx* gbContext,
-                                             IFX_Pause* pPause);
-  FXCODEC_STATUS decode_Arith_Template2_unopt(
-      CJBig2_Image* pImage,
-      CJBig2_ArithDecoder* pArithDecoder,
-      JBig2ArithCtx* gbContext,
-      IFX_Pause* pPause);
-  FXCODEC_STATUS decode_Arith_Template3_opt3(CJBig2_Image* pImage,
-                                             CJBig2_ArithDecoder* pArithDecoder,
-                                             JBig2ArithCtx* gbContext,
-                                             IFX_Pause* pPause);
-  FXCODEC_STATUS decode_Arith_Template3_unopt(
-      CJBig2_Image* pImage,
-      CJBig2_ArithDecoder* pArithDecoder,
-      JBig2ArithCtx* gbContext,
-      IFX_Pause* pPause);
-  CJBig2_Image* decode_Arith_Template0_opt3(CJBig2_ArithDecoder* pArithDecoder,
-                                            JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template0_unopt(CJBig2_ArithDecoder* pArithDecoder,
-                                             JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template1_opt3(CJBig2_ArithDecoder* pArithDecoder,
-                                            JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template1_unopt(CJBig2_ArithDecoder* pArithDecoder,
-                                             JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template2_opt3(CJBig2_ArithDecoder* pArithDecoder,
-                                            JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template2_unopt(CJBig2_ArithDecoder* pArithDecoder,
-                                             JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template3_opt3(CJBig2_ArithDecoder* pArithDecoder,
-                                            JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template3_unopt(CJBig2_ArithDecoder* pArithDecoder,
-                                             JBig2ArithCtx* gbContext);
-
-  FX_DWORD m_loopIndex;
-  uint8_t* m_pLine;
-  IFX_Pause* m_pPause;
-  FXCODEC_STATUS m_ProssiveStatus;
-  CJBig2_Image** m_pImage;
-  CJBig2_ArithDecoder* m_pArithDecoder;
-  JBig2ArithCtx* m_gbContext;
-  FX_WORD m_DecodeType;
-  FX_BOOL LTP;
-  FX_RECT m_ReplaceRect;
-};
-
-class CJBig2_GRRDProc {
- public:
-  CJBig2_Image* decode(CJBig2_ArithDecoder* pArithDecoder,
-                       JBig2ArithCtx* grContext);
-
-  CJBig2_Image* decode_Template0_unopt(CJBig2_ArithDecoder* pArithDecoder,
-                                       JBig2ArithCtx* grContext);
-
-  CJBig2_Image* decode_Template0_opt(CJBig2_ArithDecoder* pArithDecoder,
-                                     JBig2ArithCtx* grContext);
-
-  CJBig2_Image* decode_Template1_unopt(CJBig2_ArithDecoder* pArithDecoder,
-                                       JBig2ArithCtx* grContext);
-
-  CJBig2_Image* decode_Template1_opt(CJBig2_ArithDecoder* pArithDecoder,
-                                     JBig2ArithCtx* grContext);
-
-  FX_DWORD GRW;
-  FX_DWORD GRH;
-  FX_BOOL GRTEMPLATE;
-  CJBig2_Image* GRREFERENCE;
-  int32_t GRREFERENCEDX;
-  int32_t GRREFERENCEDY;
-  FX_BOOL TPGRON;
-  int8_t GRAT[4];
-};
-
-typedef struct {
-  CJBig2_ArithIntDecoder *IADT, *IAFS, *IADS, *IAIT, *IARI, *IARDW, *IARDH,
-      *IARDX, *IARDY;
-  CJBig2_ArithIaidDecoder* IAID;
-} JBig2IntDecoderState;
-
-class CJBig2_TRDProc {
- public:
-  CJBig2_Image* decode_Huffman(CJBig2_BitStream* pStream,
-                               JBig2ArithCtx* grContext);
-
-  CJBig2_Image* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                             JBig2ArithCtx* grContext,
-                             JBig2IntDecoderState* pIDS = NULL);
-
- public:
-  FX_BOOL SBHUFF;
-  FX_BOOL SBREFINE;
-  FX_DWORD SBW;
-  FX_DWORD SBH;
-  FX_DWORD SBNUMINSTANCES;
-  FX_DWORD SBSTRIPS;
-  FX_DWORD SBNUMSYMS;
-
-  JBig2HuffmanCode* SBSYMCODES;
-  uint8_t SBSYMCODELEN;
-
-  CJBig2_Image** SBSYMS;
-  FX_BOOL SBDEFPIXEL;
-
-  JBig2ComposeOp SBCOMBOP;
-  FX_BOOL TRANSPOSED;
-
-  JBig2Corner REFCORNER;
-  int8_t SBDSOFFSET;
-  CJBig2_HuffmanTable *SBHUFFFS, *SBHUFFDS, *SBHUFFDT, *SBHUFFRDW, *SBHUFFRDH,
-      *SBHUFFRDX, *SBHUFFRDY, *SBHUFFRSIZE;
-  FX_BOOL SBRTEMPLATE;
-  int8_t SBRAT[4];
-};
-class CJBig2_SDDProc {
- public:
-  CJBig2_SymbolDict* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                                  JBig2ArithCtx* gbContext,
-                                  JBig2ArithCtx* grContext);
-
-  CJBig2_SymbolDict* decode_Huffman(CJBig2_BitStream* pStream,
-                                    JBig2ArithCtx* gbContext,
-                                    JBig2ArithCtx* grContext,
-                                    IFX_Pause* pPause);
-
- public:
-  FX_BOOL SDHUFF;
-  FX_BOOL SDREFAGG;
-  FX_DWORD SDNUMINSYMS;
-  CJBig2_Image** SDINSYMS;
-  FX_DWORD SDNUMNEWSYMS;
-  FX_DWORD SDNUMEXSYMS;
-  CJBig2_HuffmanTable *SDHUFFDH, *SDHUFFDW, *SDHUFFBMSIZE, *SDHUFFAGGINST;
-  uint8_t SDTEMPLATE;
-  int8_t SDAT[8];
-  FX_BOOL SDRTEMPLATE;
-  int8_t SDRAT[4];
-};
-class CJBig2_HTRDProc {
- public:
-  CJBig2_Image* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                             JBig2ArithCtx* gbContext,
-                             IFX_Pause* pPause);
-
-  CJBig2_Image* decode_MMR(CJBig2_BitStream* pStream, IFX_Pause* pPause);
-
- public:
-  FX_DWORD HBW, HBH;
-  FX_BOOL HMMR;
-  uint8_t HTEMPLATE;
-  FX_DWORD HNUMPATS;
-  CJBig2_Image** HPATS;
-  FX_BOOL HDEFPIXEL;
-  JBig2ComposeOp HCOMBOP;
-  FX_BOOL HENABLESKIP;
-  FX_DWORD HGW, HGH;
-  int32_t HGX, HGY;
-  FX_WORD HRX, HRY;
-  uint8_t HPW, HPH;
-};
-class CJBig2_PDDProc {
- public:
-  CJBig2_PatternDict* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                                   JBig2ArithCtx* gbContext,
-                                   IFX_Pause* pPause);
-
-  CJBig2_PatternDict* decode_MMR(CJBig2_BitStream* pStream, IFX_Pause* pPause);
-
- public:
-  FX_BOOL HDMMR;
-  uint8_t HDPW, HDPH;
-  FX_DWORD GRAYMAX;
-  uint8_t HDTEMPLATE;
-};
-class CJBig2_GSIDProc {
- public:
-  FX_DWORD* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
-                         JBig2ArithCtx* gbContext,
-                         IFX_Pause* pPause);
-
-  FX_DWORD* decode_MMR(CJBig2_BitStream* pStream, IFX_Pause* pPause);
-
- public:
-  FX_BOOL GSMMR;
-  FX_BOOL GSUSESKIP;
-  uint8_t GSBPP;
-  FX_DWORD GSW, GSH;
-  uint8_t GSTEMPLATE;
-  CJBig2_Image* GSKIP;
-};
-#endif
diff --git a/core/src/fxcodec/jbig2/JBig2_GrdProc.cpp b/core/src/fxcodec/jbig2/JBig2_GrdProc.cpp
new file mode 100644
index 0000000000..5eb0570e72
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_GrdProc.cpp
@@ -0,0 +1,1257 @@
+// Copyright 2015 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 "JBig2_GrdProc.h"
+
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "JBig2_ArithDecoder.h"
+#include "JBig2_BitStream.h"
+#include "JBig2_Image.h"
+
+CJBig2_GRDProc::CJBig2_GRDProc()
+    : m_loopIndex(0),
+      m_pLine(nullptr),
+      m_pPause(nullptr),
+      m_DecodeType(0),
+      LTP(0) {
+  m_ReplaceRect.left = 0;
+  m_ReplaceRect.bottom = 0;
+  m_ReplaceRect.top = 0;
+  m_ReplaceRect.right = 0;
+}
+
+bool CJBig2_GRDProc::UseTemplate0Opt3() const {
+  return (GBAT[0] == 3) && (GBAT[1] == -1) && (GBAT[2] == -3) &&
+         (GBAT[3] == -1) && (GBAT[4] == 2) && (GBAT[5] == -2) &&
+         (GBAT[6] == -2) && (GBAT[7] == -2);
+}
+
+bool CJBig2_GRDProc::UseTemplate1Opt3() const {
+  return (GBAT[0] == 3) && (GBAT[1] == -1);
+}
+
+bool CJBig2_GRDProc::UseTemplate23Opt3() const {
+  return (GBAT[0] == 2) && (GBAT[1] == -1);
+}
+
+CJBig2_Image* CJBig2_GRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                                           JBig2ArithCtx* gbContext) {
+  if (GBW == 0 || GBH == 0)
+    return new CJBig2_Image(GBW, GBH);
+
+  if (GBTEMPLATE == 0) {
+    if (UseTemplate0Opt3())
+      return decode_Arith_Template0_opt3(pArithDecoder, gbContext);
+    return decode_Arith_Template0_unopt(pArithDecoder, gbContext);
+  } else if (GBTEMPLATE == 1) {
+    if (UseTemplate1Opt3())
+      return decode_Arith_Template1_opt3(pArithDecoder, gbContext);
+    return decode_Arith_Template1_unopt(pArithDecoder, gbContext);
+  } else if (GBTEMPLATE == 2) {
+    if (UseTemplate23Opt3())
+      return decode_Arith_Template2_opt3(pArithDecoder, gbContext);
+    return decode_Arith_Template2_unopt(pArithDecoder, gbContext);
+  } else {
+    if (UseTemplate23Opt3())
+      return decode_Arith_Template3_opt3(pArithDecoder, gbContext);
+    return decode_Arith_Template3_unopt(pArithDecoder, gbContext);
+  }
+}
+CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template0_opt3(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2;
+  uint8_t* pLine, *pLine1, *pLine2, cVal;
+  int32_t nStride, nStride2, k;
+  int32_t nLineBytes, nBitsLeft, cc;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
+  if (!GBREG->m_pData)
+    return nullptr;
+
+  pLine = GBREG->m_pData;
+  nStride = GBREG->m_nStride;
+  nStride2 = nStride << 1;
+  nLineBytes = ((GBW + 7) >> 3) - 1;
+  nBitsLeft = GBW - (nLineBytes << 3);
+  FX_DWORD height = GBH & 0x7fffffff;
+  for (FX_DWORD h = 0; h < height; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x9b25]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      GBREG->copyLine(h, h - 1);
+    } else {
+      if (h > 1) {
+        pLine1 = pLine - nStride2;
+        pLine2 = pLine - nStride;
+        line1 = (*pLine1++) << 6;
+        line2 = *pLine2++;
+        CONTEXT = ((line1 & 0xf800) | (line2 & 0x07f0));
+        for (cc = 0; cc < nLineBytes; cc++) {
+          line1 = (line1 << 8) | ((*pLine1++) << 6);
+          line2 = (line2 << 8) | (*pLine2++);
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
+                       ((line1 >> k) & 0x0800) | ((line2 >> k) & 0x0010));
+          }
+          pLine[cc] = cVal;
+        }
+        line1 <<= 8;
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT =
+              (((CONTEXT & 0x7bf7) << 1) | bVal |
+               ((line1 >> (7 - k)) & 0x0800) | ((line2 >> (7 - k)) & 0x0010));
+        }
+        pLine[nLineBytes] = cVal;
+      } else {
+        pLine2 = pLine - nStride;
+        line2 = (h & 1) ? (*pLine2++) : 0;
+        CONTEXT = (line2 & 0x07f0);
+        for (cc = 0; cc < nLineBytes; cc++) {
+          if (h & 1) {
+            line2 = (line2 << 8) | (*pLine2++);
+          }
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT =
+                (((CONTEXT & 0x7bf7) << 1) | bVal | ((line2 >> k) & 0x0010));
+          }
+          pLine[cc] = cVal;
+        }
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
+                     (((line2 >> (7 - k))) & 0x0010));
+        }
+        pLine[nLineBytes] = cVal;
+      }
+    }
+    pLine += nStride;
+  }
+  return GBREG.release();
+}
+
+CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template0_unopt(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2, line3;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
+  GBREG->fill(0);
+  for (FX_DWORD h = 0; h < GBH; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x9b25]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      GBREG->copyLine(h, h - 1);
+    } else {
+      line1 = GBREG->getPixel(1, h - 2);
+      line1 |= GBREG->getPixel(0, h - 2) << 1;
+      line2 = GBREG->getPixel(2, h - 1);
+      line2 |= GBREG->getPixel(1, h - 1) << 1;
+      line2 |= GBREG->getPixel(0, h - 1) << 2;
+      line3 = 0;
+      for (FX_DWORD w = 0; w < GBW; w++) {
+        if (USESKIP && SKIP->getPixel(w, h)) {
+          bVal = 0;
+        } else {
+          CONTEXT = line3;
+          CONTEXT |= GBREG->getPixel(w + GBAT[0], h + GBAT[1]) << 4;
+          CONTEXT |= line2 << 5;
+          CONTEXT |= GBREG->getPixel(w + GBAT[2], h + GBAT[3]) << 10;
+          CONTEXT |= GBREG->getPixel(w + GBAT[4], h + GBAT[5]) << 11;
+          CONTEXT |= line1 << 12;
+          CONTEXT |= GBREG->getPixel(w + GBAT[6], h + GBAT[7]) << 15;
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+        }
+        if (bVal) {
+          GBREG->setPixel(w, h, bVal);
+        }
+        line1 = ((line1 << 1) | GBREG->getPixel(w + 2, h - 2)) & 0x07;
+        line2 = ((line2 << 1) | GBREG->getPixel(w + 3, h - 1)) & 0x1f;
+        line3 = ((line3 << 1) | bVal) & 0x0f;
+      }
+    }
+  }
+  return GBREG.release();
+}
+
+CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template1_opt3(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2;
+  uint8_t* pLine, *pLine1, *pLine2, cVal;
+  int32_t nStride, nStride2, k;
+  int32_t nLineBytes, nBitsLeft, cc;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
+  if (!GBREG->m_pData)
+    return nullptr;
+
+  pLine = GBREG->m_pData;
+  nStride = GBREG->m_nStride;
+  nStride2 = nStride << 1;
+  nLineBytes = ((GBW + 7) >> 3) - 1;
+  nBitsLeft = GBW - (nLineBytes << 3);
+  for (FX_DWORD h = 0; h < GBH; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x0795]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      GBREG->copyLine(h, h - 1);
+    } else {
+      if (h > 1) {
+        pLine1 = pLine - nStride2;
+        pLine2 = pLine - nStride;
+        line1 = (*pLine1++) << 4;
+        line2 = *pLine2++;
+        CONTEXT = (line1 & 0x1e00) | ((line2 >> 1) & 0x01f8);
+        for (cc = 0; cc < nLineBytes; cc++) {
+          line1 = (line1 << 8) | ((*pLine1++) << 4);
+          line2 = (line2 << 8) | (*pLine2++);
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
+                      ((line1 >> k) & 0x0200) | ((line2 >> (k + 1)) & 0x0008);
+          }
+          pLine[cc] = cVal;
+        }
+        line1 <<= 8;
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
+                    ((line1 >> (7 - k)) & 0x0200) |
+                    ((line2 >> (8 - k)) & 0x0008);
+        }
+        pLine[nLineBytes] = cVal;
+      } else {
+        pLine2 = pLine - nStride;
+        line2 = (h & 1) ? (*pLine2++) : 0;
+        CONTEXT = (line2 >> 1) & 0x01f8;
+        for (cc = 0; cc < nLineBytes; cc++) {
+          if (h & 1) {
+            line2 = (line2 << 8) | (*pLine2++);
+          }
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
+                      ((line2 >> (k + 1)) & 0x0008);
+          }
+          pLine[cc] = cVal;
+        }
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT =
+              ((CONTEXT & 0x0efb) << 1) | bVal | ((line2 >> (8 - k)) & 0x0008);
+        }
+        pLine[nLineBytes] = cVal;
+      }
+    }
+    pLine += nStride;
+  }
+  return GBREG.release();
+}
+
+CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template1_unopt(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2, line3;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
+  GBREG->fill(0);
+  for (FX_DWORD h = 0; h < GBH; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x0795]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      GBREG->copyLine(h, h - 1);
+    } else {
+      line1 = GBREG->getPixel(2, h - 2);
+      line1 |= GBREG->getPixel(1, h - 2) << 1;
+      line1 |= GBREG->getPixel(0, h - 2) << 2;
+      line2 = GBREG->getPixel(2, h - 1);
+      line2 |= GBREG->getPixel(1, h - 1) << 1;
+      line2 |= GBREG->getPixel(0, h - 1) << 2;
+      line3 = 0;
+      for (FX_DWORD w = 0; w < GBW; w++) {
+        if (USESKIP && SKIP->getPixel(w, h)) {
+          bVal = 0;
+        } else {
+          CONTEXT = line3;
+          CONTEXT |= GBREG->getPixel(w + GBAT[0], h + GBAT[1]) << 3;
+          CONTEXT |= line2 << 4;
+          CONTEXT |= line1 << 9;
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+        }
+        if (bVal) {
+          GBREG->setPixel(w, h, bVal);
+        }
+        line1 = ((line1 << 1) | GBREG->getPixel(w + 3, h - 2)) & 0x0f;
+        line2 = ((line2 << 1) | GBREG->getPixel(w + 3, h - 1)) & 0x1f;
+        line3 = ((line3 << 1) | bVal) & 0x07;
+      }
+    }
+  }
+  return GBREG.release();
+}
+CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template2_opt3(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2;
+  uint8_t* pLine, *pLine1, *pLine2, cVal;
+  int32_t nStride, nStride2, k;
+  int32_t nLineBytes, nBitsLeft, cc;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
+  if (!GBREG->m_pData)
+    return nullptr;
+
+  pLine = GBREG->m_pData;
+  nStride = GBREG->m_nStride;
+  nStride2 = nStride << 1;
+  nLineBytes = ((GBW + 7) >> 3) - 1;
+  nBitsLeft = GBW - (nLineBytes << 3);
+  for (FX_DWORD h = 0; h < GBH; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x00e5]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      GBREG->copyLine(h, h - 1);
+    } else {
+      if (h > 1) {
+        pLine1 = pLine - nStride2;
+        pLine2 = pLine - nStride;
+        line1 = (*pLine1++) << 1;
+        line2 = *pLine2++;
+        CONTEXT = (line1 & 0x0380) | ((line2 >> 3) & 0x007c);
+        for (cc = 0; cc < nLineBytes; cc++) {
+          line1 = (line1 << 8) | ((*pLine1++) << 1);
+          line2 = (line2 << 8) | (*pLine2++);
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
+                      ((line1 >> k) & 0x0080) | ((line2 >> (k + 3)) & 0x0004);
+          }
+          pLine[cc] = cVal;
+        }
+        line1 <<= 8;
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
+                    ((line1 >> (7 - k)) & 0x0080) |
+                    ((line2 >> (10 - k)) & 0x0004);
+        }
+        pLine[nLineBytes] = cVal;
+      } else {
+        pLine2 = pLine - nStride;
+        line2 = (h & 1) ? (*pLine2++) : 0;
+        CONTEXT = (line2 >> 3) & 0x007c;
+        for (cc = 0; cc < nLineBytes; cc++) {
+          if (h & 1) {
+            line2 = (line2 << 8) | (*pLine2++);
+          }
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
+                      ((line2 >> (k + 3)) & 0x0004);
+          }
+          pLine[cc] = cVal;
+        }
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
+                    (((line2 >> (10 - k))) & 0x0004);
+        }
+        pLine[nLineBytes] = cVal;
+      }
+    }
+    pLine += nStride;
+  }
+  return GBREG.release();
+}
+
+CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template2_unopt(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2, line3;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
+  GBREG->fill(0);
+  for (FX_DWORD h = 0; h < GBH; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x00e5]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      GBREG->copyLine(h, h - 1);
+    } else {
+      line1 = GBREG->getPixel(1, h - 2);
+      line1 |= GBREG->getPixel(0, h - 2) << 1;
+      line2 = GBREG->getPixel(1, h - 1);
+      line2 |= GBREG->getPixel(0, h - 1) << 1;
+      line3 = 0;
+      for (FX_DWORD w = 0; w < GBW; w++) {
+        if (USESKIP && SKIP->getPixel(w, h)) {
+          bVal = 0;
+        } else {
+          CONTEXT = line3;
+          CONTEXT |= GBREG->getPixel(w + GBAT[0], h + GBAT[1]) << 2;
+          CONTEXT |= line2 << 3;
+          CONTEXT |= line1 << 7;
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+        }
+        if (bVal) {
+          GBREG->setPixel(w, h, bVal);
+        }
+        line1 = ((line1 << 1) | GBREG->getPixel(w + 2, h - 2)) & 0x07;
+        line2 = ((line2 << 1) | GBREG->getPixel(w + 2, h - 1)) & 0x0f;
+        line3 = ((line3 << 1) | bVal) & 0x03;
+      }
+    }
+  }
+  return GBREG.release();
+}
+
+CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template3_opt3(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1;
+  uint8_t* pLine, *pLine1, cVal;
+  int32_t nStride, k;
+  int32_t nLineBytes, nBitsLeft, cc;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
+  if (!GBREG->m_pData)
+    return nullptr;
+
+  pLine = GBREG->m_pData;
+  nStride = GBREG->m_nStride;
+  nLineBytes = ((GBW + 7) >> 3) - 1;
+  nBitsLeft = GBW - (nLineBytes << 3);
+  for (FX_DWORD h = 0; h < GBH; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      GBREG->copyLine(h, h - 1);
+    } else {
+      if (h > 0) {
+        pLine1 = pLine - nStride;
+        line1 = *pLine1++;
+        CONTEXT = (line1 >> 1) & 0x03f0;
+        for (cc = 0; cc < nLineBytes; cc++) {
+          line1 = (line1 << 8) | (*pLine1++);
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal |
+                      ((line1 >> (k + 1)) & 0x0010);
+          }
+          pLine[cc] = cVal;
+        }
+        line1 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT =
+              ((CONTEXT & 0x01f7) << 1) | bVal | ((line1 >> (8 - k)) & 0x0010);
+        }
+        pLine[nLineBytes] = cVal;
+      } else {
+        CONTEXT = 0;
+        for (cc = 0; cc < nLineBytes; cc++) {
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal;
+          }
+          pLine[cc] = cVal;
+        }
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal;
+        }
+        pLine[nLineBytes] = cVal;
+      }
+    }
+    pLine += nStride;
+  }
+  return GBREG.release();
+}
+
+CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template3_unopt(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GBREG(new CJBig2_Image(GBW, GBH));
+  GBREG->fill(0);
+  for (FX_DWORD h = 0; h < GBH; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      GBREG->copyLine(h, h - 1);
+    } else {
+      line1 = GBREG->getPixel(1, h - 1);
+      line1 |= GBREG->getPixel(0, h - 1) << 1;
+      line2 = 0;
+      for (FX_DWORD w = 0; w < GBW; w++) {
+        if (USESKIP && SKIP->getPixel(w, h)) {
+          bVal = 0;
+        } else {
+          CONTEXT = line2;
+          CONTEXT |= GBREG->getPixel(w + GBAT[0], h + GBAT[1]) << 4;
+          CONTEXT |= line1 << 5;
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+        }
+        if (bVal) {
+          GBREG->setPixel(w, h, bVal);
+        }
+        line1 = ((line1 << 1) | GBREG->getPixel(w + 2, h - 1)) & 0x1f;
+        line2 = ((line2 << 1) | bVal) & 0x0f;
+      }
+    }
+  }
+  return GBREG.release();
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::Start_decode_Arith(
+    CJBig2_Image** pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  if (GBW == 0 || GBH == 0) {
+    m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+    return FXCODEC_STATUS_DECODE_FINISH;
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_READY;
+  m_pPause = pPause;
+  if (!*pImage)
+    *pImage = new CJBig2_Image(GBW, GBH);
+  if (!(*pImage)->m_pData) {
+    delete *pImage;
+    *pImage = nullptr;
+    m_ProssiveStatus = FXCODEC_STATUS_ERROR;
+    return FXCODEC_STATUS_ERROR;
+  }
+  m_DecodeType = 1;
+  m_pImage = pImage;
+  (*m_pImage)->fill(0);
+  m_pArithDecoder = pArithDecoder;
+  m_gbContext = gbContext;
+  LTP = 0;
+  m_pLine = nullptr;
+  m_loopIndex = 0;
+  return decode_Arith(pPause);
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith(IFX_Pause* pPause) {
+  int iline = m_loopIndex;
+  CJBig2_Image* pImage = *m_pImage;
+  if (GBTEMPLATE == 0) {
+    if (UseTemplate0Opt3()) {
+      m_ProssiveStatus = decode_Arith_Template0_opt3(pImage, m_pArithDecoder,
+                                                     m_gbContext, pPause);
+    } else {
+      m_ProssiveStatus = decode_Arith_Template0_unopt(pImage, m_pArithDecoder,
+                                                      m_gbContext, pPause);
+    }
+  } else if (GBTEMPLATE == 1) {
+    if (UseTemplate1Opt3()) {
+      m_ProssiveStatus = decode_Arith_Template1_opt3(pImage, m_pArithDecoder,
+                                                     m_gbContext, pPause);
+    } else {
+      m_ProssiveStatus = decode_Arith_Template1_unopt(pImage, m_pArithDecoder,
+                                                      m_gbContext, pPause);
+    }
+  } else if (GBTEMPLATE == 2) {
+    if (UseTemplate23Opt3()) {
+      m_ProssiveStatus = decode_Arith_Template2_opt3(pImage, m_pArithDecoder,
+                                                     m_gbContext, pPause);
+    } else {
+      m_ProssiveStatus = decode_Arith_Template2_unopt(pImage, m_pArithDecoder,
+                                                      m_gbContext, pPause);
+    }
+  } else {
+    if (UseTemplate23Opt3()) {
+      m_ProssiveStatus = decode_Arith_Template3_opt3(pImage, m_pArithDecoder,
+                                                     m_gbContext, pPause);
+    } else {
+      m_ProssiveStatus = decode_Arith_Template3_unopt(pImage, m_pArithDecoder,
+                                                      m_gbContext, pPause);
+    }
+  }
+  m_ReplaceRect.left = 0;
+  m_ReplaceRect.right = pImage->m_nWidth;
+  m_ReplaceRect.top = iline;
+  m_ReplaceRect.bottom = m_loopIndex;
+  if (m_ProssiveStatus == FXCODEC_STATUS_DECODE_FINISH) {
+    m_loopIndex = 0;
+  }
+  return m_ProssiveStatus;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::Start_decode_MMR(CJBig2_Image** pImage,
+                                                CJBig2_BitStream* pStream,
+                                                IFX_Pause* pPause) {
+  int bitpos, i;
+  *pImage = new CJBig2_Image(GBW, GBH);
+  if (!(*pImage)->m_pData) {
+    delete (*pImage);
+    (*pImage) = nullptr;
+    m_ProssiveStatus = FXCODEC_STATUS_ERROR;
+    return m_ProssiveStatus;
+  }
+  bitpos = (int)pStream->getBitPos();
+  _FaxG4Decode(pStream->getBuf(), pStream->getLength(), &bitpos,
+               (*pImage)->m_pData, GBW, GBH, (*pImage)->m_nStride);
+  pStream->setBitPos(bitpos);
+  for (i = 0; (FX_DWORD)i < (*pImage)->m_nStride * GBH; i++) {
+    (*pImage)->m_pData[i] = ~(*pImage)->m_pData[i];
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return m_ProssiveStatus;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::Continue_decode(IFX_Pause* pPause) {
+  if (m_ProssiveStatus != FXCODEC_STATUS_DECODE_TOBECONTINUE)
+    return m_ProssiveStatus;
+
+  if (m_DecodeType != 1) {
+    m_ProssiveStatus = FXCODEC_STATUS_ERROR;
+    return m_ProssiveStatus;
+  }
+
+  return decode_Arith(pPause);
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template0_opt3(
+    CJBig2_Image* pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_BOOL SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2;
+  uint8_t* pLine1, *pLine2, cVal;
+  int32_t nStride, nStride2, k;
+  int32_t nLineBytes, nBitsLeft, cc;
+  if (!m_pLine) {
+    m_pLine = pImage->m_pData;
+  }
+  nStride = pImage->m_nStride;
+  nStride2 = nStride << 1;
+  nLineBytes = ((GBW + 7) >> 3) - 1;
+  nBitsLeft = GBW - (nLineBytes << 3);
+  FX_DWORD height = GBH & 0x7fffffff;
+  for (; m_loopIndex < height; m_loopIndex++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x9b25]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
+    } else {
+      if (m_loopIndex > 1) {
+        pLine1 = m_pLine - nStride2;
+        pLine2 = m_pLine - nStride;
+        line1 = (*pLine1++) << 6;
+        line2 = *pLine2++;
+        CONTEXT = ((line1 & 0xf800) | (line2 & 0x07f0));
+        for (cc = 0; cc < nLineBytes; cc++) {
+          line1 = (line1 << 8) | ((*pLine1++) << 6);
+          line2 = (line2 << 8) | (*pLine2++);
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
+                       ((line1 >> k) & 0x0800) | ((line2 >> k) & 0x0010));
+          }
+          m_pLine[cc] = cVal;
+        }
+        line1 <<= 8;
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT =
+              (((CONTEXT & 0x7bf7) << 1) | bVal |
+               ((line1 >> (7 - k)) & 0x0800) | ((line2 >> (7 - k)) & 0x0010));
+        }
+        m_pLine[nLineBytes] = cVal;
+      } else {
+        pLine2 = m_pLine - nStride;
+        line2 = (m_loopIndex & 1) ? (*pLine2++) : 0;
+        CONTEXT = (line2 & 0x07f0);
+        for (cc = 0; cc < nLineBytes; cc++) {
+          if (m_loopIndex & 1) {
+            line2 = (line2 << 8) | (*pLine2++);
+          }
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT =
+                (((CONTEXT & 0x7bf7) << 1) | bVal | ((line2 >> k) & 0x0010));
+          }
+          m_pLine[cc] = cVal;
+        }
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = (((CONTEXT & 0x7bf7) << 1) | bVal |
+                     ((line2 >> (7 - k)) & 0x0010));
+        }
+        m_pLine[nLineBytes] = cVal;
+      }
+    }
+    m_pLine += nStride;
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_loopIndex++;
+      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
+    }
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return FXCODEC_STATUS_DECODE_FINISH;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template0_unopt(
+    CJBig2_Image* pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_BOOL SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2, line3;
+  for (; m_loopIndex < GBH; m_loopIndex++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x9b25]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
+    } else {
+      line1 = pImage->getPixel(1, m_loopIndex - 2);
+      line1 |= pImage->getPixel(0, m_loopIndex - 2) << 1;
+      line2 = pImage->getPixel(2, m_loopIndex - 1);
+      line2 |= pImage->getPixel(1, m_loopIndex - 1) << 1;
+      line2 |= pImage->getPixel(0, m_loopIndex - 1) << 2;
+      line3 = 0;
+      for (FX_DWORD w = 0; w < GBW; w++) {
+        if (USESKIP && SKIP->getPixel(w, m_loopIndex)) {
+          bVal = 0;
+        } else {
+          CONTEXT = line3;
+          CONTEXT |= pImage->getPixel(w + GBAT[0], m_loopIndex + GBAT[1]) << 4;
+          CONTEXT |= line2 << 5;
+          CONTEXT |= pImage->getPixel(w + GBAT[2], m_loopIndex + GBAT[3]) << 10;
+          CONTEXT |= pImage->getPixel(w + GBAT[4], m_loopIndex + GBAT[5]) << 11;
+          CONTEXT |= line1 << 12;
+          CONTEXT |= pImage->getPixel(w + GBAT[6], m_loopIndex + GBAT[7]) << 15;
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+        }
+        if (bVal) {
+          pImage->setPixel(w, m_loopIndex, bVal);
+        }
+        line1 =
+            ((line1 << 1) | pImage->getPixel(w + 2, m_loopIndex - 2)) & 0x07;
+        line2 =
+            ((line2 << 1) | pImage->getPixel(w + 3, m_loopIndex - 1)) & 0x1f;
+        line3 = ((line3 << 1) | bVal) & 0x0f;
+      }
+    }
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_loopIndex++;
+      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
+    }
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return FXCODEC_STATUS_DECODE_FINISH;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template1_opt3(
+    CJBig2_Image* pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_BOOL SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2;
+  uint8_t* pLine1, *pLine2, cVal;
+  int32_t nStride, nStride2, k;
+  int32_t nLineBytes, nBitsLeft, cc;
+  if (!m_pLine) {
+    m_pLine = pImage->m_pData;
+  }
+  nStride = pImage->m_nStride;
+  nStride2 = nStride << 1;
+  nLineBytes = ((GBW + 7) >> 3) - 1;
+  nBitsLeft = GBW - (nLineBytes << 3);
+  for (; m_loopIndex < GBH; m_loopIndex++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x0795]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
+    } else {
+      if (m_loopIndex > 1) {
+        pLine1 = m_pLine - nStride2;
+        pLine2 = m_pLine - nStride;
+        line1 = (*pLine1++) << 4;
+        line2 = *pLine2++;
+        CONTEXT = (line1 & 0x1e00) | ((line2 >> 1) & 0x01f8);
+        for (cc = 0; cc < nLineBytes; cc++) {
+          line1 = (line1 << 8) | ((*pLine1++) << 4);
+          line2 = (line2 << 8) | (*pLine2++);
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
+                      ((line1 >> k) & 0x0200) | ((line2 >> (k + 1)) & 0x0008);
+          }
+          m_pLine[cc] = cVal;
+        }
+        line1 <<= 8;
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
+                    ((line1 >> (7 - k)) & 0x0200) |
+                    ((line2 >> (8 - k)) & 0x0008);
+        }
+        m_pLine[nLineBytes] = cVal;
+      } else {
+        pLine2 = m_pLine - nStride;
+        line2 = (m_loopIndex & 1) ? (*pLine2++) : 0;
+        CONTEXT = (line2 >> 1) & 0x01f8;
+        for (cc = 0; cc < nLineBytes; cc++) {
+          if (m_loopIndex & 1) {
+            line2 = (line2 << 8) | (*pLine2++);
+          }
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
+                      ((line2 >> (k + 1)) & 0x0008);
+          }
+          m_pLine[cc] = cVal;
+        }
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT =
+              ((CONTEXT & 0x0efb) << 1) | bVal | ((line2 >> (8 - k)) & 0x0008);
+        }
+        m_pLine[nLineBytes] = cVal;
+      }
+    }
+    m_pLine += nStride;
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_loopIndex++;
+      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
+    }
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return FXCODEC_STATUS_DECODE_FINISH;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template1_unopt(
+    CJBig2_Image* pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_BOOL SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2, line3;
+  for (FX_DWORD h = 0; h < GBH; h++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x0795]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      pImage->copyLine(h, h - 1);
+    } else {
+      line1 = pImage->getPixel(2, h - 2);
+      line1 |= pImage->getPixel(1, h - 2) << 1;
+      line1 |= pImage->getPixel(0, h - 2) << 2;
+      line2 = pImage->getPixel(2, h - 1);
+      line2 |= pImage->getPixel(1, h - 1) << 1;
+      line2 |= pImage->getPixel(0, h - 1) << 2;
+      line3 = 0;
+      for (FX_DWORD w = 0; w < GBW; w++) {
+        if (USESKIP && SKIP->getPixel(w, h)) {
+          bVal = 0;
+        } else {
+          CONTEXT = line3;
+          CONTEXT |= pImage->getPixel(w + GBAT[0], h + GBAT[1]) << 3;
+          CONTEXT |= line2 << 4;
+          CONTEXT |= line1 << 9;
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+        }
+        if (bVal) {
+          pImage->setPixel(w, h, bVal);
+        }
+        line1 = ((line1 << 1) | pImage->getPixel(w + 3, h - 2)) & 0x0f;
+        line2 = ((line2 << 1) | pImage->getPixel(w + 3, h - 1)) & 0x1f;
+        line3 = ((line3 << 1) | bVal) & 0x07;
+      }
+    }
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_loopIndex++;
+      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
+    }
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return FXCODEC_STATUS_DECODE_FINISH;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template2_opt3(
+    CJBig2_Image* pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_BOOL SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2;
+  uint8_t* pLine1, *pLine2, cVal;
+  int32_t nStride, nStride2, k;
+  int32_t nLineBytes, nBitsLeft, cc;
+  if (!m_pLine) {
+    m_pLine = pImage->m_pData;
+  }
+  nStride = pImage->m_nStride;
+  nStride2 = nStride << 1;
+  nLineBytes = ((GBW + 7) >> 3) - 1;
+  nBitsLeft = GBW - (nLineBytes << 3);
+  for (; m_loopIndex < GBH; m_loopIndex++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x00e5]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
+    } else {
+      if (m_loopIndex > 1) {
+        pLine1 = m_pLine - nStride2;
+        pLine2 = m_pLine - nStride;
+        line1 = (*pLine1++) << 1;
+        line2 = *pLine2++;
+        CONTEXT = (line1 & 0x0380) | ((line2 >> 3) & 0x007c);
+        for (cc = 0; cc < nLineBytes; cc++) {
+          line1 = (line1 << 8) | ((*pLine1++) << 1);
+          line2 = (line2 << 8) | (*pLine2++);
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
+                      ((line1 >> k) & 0x0080) | ((line2 >> (k + 3)) & 0x0004);
+          }
+          m_pLine[cc] = cVal;
+        }
+        line1 <<= 8;
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
+                    ((line1 >> (7 - k)) & 0x0080) |
+                    ((line2 >> (10 - k)) & 0x0004);
+        }
+        m_pLine[nLineBytes] = cVal;
+      } else {
+        pLine2 = m_pLine - nStride;
+        line2 = (m_loopIndex & 1) ? (*pLine2++) : 0;
+        CONTEXT = (line2 >> 3) & 0x007c;
+        for (cc = 0; cc < nLineBytes; cc++) {
+          if (m_loopIndex & 1) {
+            line2 = (line2 << 8) | (*pLine2++);
+          }
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
+                      ((line2 >> (k + 3)) & 0x0004);
+          }
+          m_pLine[cc] = cVal;
+        }
+        line2 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
+                    (((line2 >> (10 - k))) & 0x0004);
+        }
+        m_pLine[nLineBytes] = cVal;
+      }
+    }
+    m_pLine += nStride;
+    if (pPause && m_loopIndex % 50 == 0 && pPause->NeedToPauseNow()) {
+      m_loopIndex++;
+      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
+    }
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return FXCODEC_STATUS_DECODE_FINISH;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template2_unopt(
+    CJBig2_Image* pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_BOOL SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2, line3;
+  for (; m_loopIndex < GBH; m_loopIndex++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x00e5]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
+    } else {
+      line1 = pImage->getPixel(1, m_loopIndex - 2);
+      line1 |= pImage->getPixel(0, m_loopIndex - 2) << 1;
+      line2 = pImage->getPixel(1, m_loopIndex - 1);
+      line2 |= pImage->getPixel(0, m_loopIndex - 1) << 1;
+      line3 = 0;
+      for (FX_DWORD w = 0; w < GBW; w++) {
+        if (USESKIP && SKIP->getPixel(w, m_loopIndex)) {
+          bVal = 0;
+        } else {
+          CONTEXT = line3;
+          CONTEXT |= pImage->getPixel(w + GBAT[0], m_loopIndex + GBAT[1]) << 2;
+          CONTEXT |= line2 << 3;
+          CONTEXT |= line1 << 7;
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+        }
+        if (bVal) {
+          pImage->setPixel(w, m_loopIndex, bVal);
+        }
+        line1 =
+            ((line1 << 1) | pImage->getPixel(w + 2, m_loopIndex - 2)) & 0x07;
+        line2 =
+            ((line2 << 1) | pImage->getPixel(w + 2, m_loopIndex - 1)) & 0x0f;
+        line3 = ((line3 << 1) | bVal) & 0x03;
+      }
+    }
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_loopIndex++;
+      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
+    }
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return FXCODEC_STATUS_DECODE_FINISH;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template3_opt3(
+    CJBig2_Image* pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_BOOL SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1;
+  uint8_t* pLine1, cVal;
+  int32_t nStride, k;
+  int32_t nLineBytes, nBitsLeft, cc;
+  if (!m_pLine) {
+    m_pLine = pImage->m_pData;
+  }
+  nStride = pImage->m_nStride;
+  nLineBytes = ((GBW + 7) >> 3) - 1;
+  nBitsLeft = GBW - (nLineBytes << 3);
+  for (; m_loopIndex < GBH; m_loopIndex++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
+    } else {
+      if (m_loopIndex > 0) {
+        pLine1 = m_pLine - nStride;
+        line1 = *pLine1++;
+        CONTEXT = (line1 >> 1) & 0x03f0;
+        for (cc = 0; cc < nLineBytes; cc++) {
+          line1 = (line1 << 8) | (*pLine1++);
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal |
+                      ((line1 >> (k + 1)) & 0x0010);
+          }
+          m_pLine[cc] = cVal;
+        }
+        line1 <<= 8;
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT =
+              ((CONTEXT & 0x01f7) << 1) | bVal | ((line1 >> (8 - k)) & 0x0010);
+        }
+        m_pLine[nLineBytes] = cVal;
+      } else {
+        CONTEXT = 0;
+        for (cc = 0; cc < nLineBytes; cc++) {
+          cVal = 0;
+          for (k = 7; k >= 0; k--) {
+            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+            cVal |= bVal << k;
+            CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal;
+          }
+          m_pLine[cc] = cVal;
+        }
+        cVal = 0;
+        for (k = 0; k < nBitsLeft; k++) {
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x01f7) << 1) | bVal;
+        }
+        m_pLine[nLineBytes] = cVal;
+      }
+    }
+    m_pLine += nStride;
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_loopIndex++;
+      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
+    }
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return FXCODEC_STATUS_DECODE_FINISH;
+}
+
+FXCODEC_STATUS CJBig2_GRDProc::decode_Arith_Template3_unopt(
+    CJBig2_Image* pImage,
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_BOOL SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2;
+  for (; m_loopIndex < GBH; m_loopIndex++) {
+    if (TPGDON) {
+      SLTP = pArithDecoder->DECODE(&gbContext[0x0195]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 1) {
+      pImage->copyLine(m_loopIndex, m_loopIndex - 1);
+    } else {
+      line1 = pImage->getPixel(1, m_loopIndex - 1);
+      line1 |= pImage->getPixel(0, m_loopIndex - 1) << 1;
+      line2 = 0;
+      for (FX_DWORD w = 0; w < GBW; w++) {
+        if (USESKIP && SKIP->getPixel(w, m_loopIndex)) {
+          bVal = 0;
+        } else {
+          CONTEXT = line2;
+          CONTEXT |= pImage->getPixel(w + GBAT[0], m_loopIndex + GBAT[1]) << 4;
+          CONTEXT |= line1 << 5;
+          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
+        }
+        if (bVal) {
+          pImage->setPixel(w, m_loopIndex, bVal);
+        }
+        line1 =
+            ((line1 << 1) | pImage->getPixel(w + 2, m_loopIndex - 1)) & 0x1f;
+        line2 = ((line2 << 1) | bVal) & 0x0f;
+      }
+    }
+    if (pPause && pPause->NeedToPauseNow()) {
+      m_loopIndex++;
+      m_ProssiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return FXCODEC_STATUS_DECODE_TOBECONTINUE;
+    }
+  }
+  m_ProssiveStatus = FXCODEC_STATUS_DECODE_FINISH;
+  return FXCODEC_STATUS_DECODE_FINISH;
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_GrdProc.h b/core/src/fxcodec/jbig2/JBig2_GrdProc.h
new file mode 100644
index 0000000000..6729e22eed
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_GrdProc.h
@@ -0,0 +1,124 @@
+// Copyright 2015 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_SRC_FXCODEC_JBIG2_JBIG2_GRDPROC_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_GRDPROC_H_
+
+#include "../../../core/include/fxcrt/fx_system.h"
+#include "../../../include/fxcodec/fx_codec_def.h"
+#include "../../../include/fxcrt/fx_coordinates.h"
+
+class CJBig2_ArithDecoder;
+class CJBig2_BitStream;
+class CJBig2_Image;
+class IFX_Pause;
+struct JBig2ArithCtx;
+
+class CJBig2_GRDProc {
+ public:
+  CJBig2_GRDProc();
+
+  CJBig2_Image* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                             JBig2ArithCtx* gbContext);
+
+  FXCODEC_STATUS Start_decode_Arith(CJBig2_Image** pImage,
+                                    CJBig2_ArithDecoder* pArithDecoder,
+                                    JBig2ArithCtx* gbContext,
+                                    IFX_Pause* pPause);
+  FXCODEC_STATUS Start_decode_MMR(CJBig2_Image** pImage,
+                                  CJBig2_BitStream* pStream,
+                                  IFX_Pause* pPause);
+  FXCODEC_STATUS Continue_decode(IFX_Pause* pPause);
+  FX_RECT GetReplaceRect() const { return m_ReplaceRect; }
+
+  FX_BOOL MMR;
+  FX_DWORD GBW;
+  FX_DWORD GBH;
+  uint8_t GBTEMPLATE;
+  FX_BOOL TPGDON;
+  FX_BOOL USESKIP;
+  CJBig2_Image* SKIP;
+  int8_t GBAT[8];
+
+ private:
+  bool UseTemplate0Opt3() const;
+  bool UseTemplate1Opt3() const;
+  bool UseTemplate23Opt3() const;
+
+  FXCODEC_STATUS decode_Arith(IFX_Pause* pPause);
+  FXCODEC_STATUS decode_Arith_Template0_opt3(CJBig2_Image* pImage,
+                                             CJBig2_ArithDecoder* pArithDecoder,
+                                             JBig2ArithCtx* gbContext,
+                                             IFX_Pause* pPause);
+  FXCODEC_STATUS decode_Arith_Template0_unopt(
+      CJBig2_Image* pImage,
+      CJBig2_ArithDecoder* pArithDecoder,
+      JBig2ArithCtx* gbContext,
+      IFX_Pause* pPause);
+  FXCODEC_STATUS decode_Arith_Template1_opt3(CJBig2_Image* pImage,
+                                             CJBig2_ArithDecoder* pArithDecoder,
+                                             JBig2ArithCtx* gbContext,
+                                             IFX_Pause* pPause);
+  FXCODEC_STATUS decode_Arith_Template1_unopt(
+      CJBig2_Image* pImage,
+      CJBig2_ArithDecoder* pArithDecoder,
+      JBig2ArithCtx* gbContext,
+      IFX_Pause* pPause);
+  FXCODEC_STATUS decode_Arith_Template2_opt3(CJBig2_Image* pImage,
+                                             CJBig2_ArithDecoder* pArithDecoder,
+                                             JBig2ArithCtx* gbContext,
+                                             IFX_Pause* pPause);
+  FXCODEC_STATUS decode_Arith_Template2_unopt(
+      CJBig2_Image* pImage,
+      CJBig2_ArithDecoder* pArithDecoder,
+      JBig2ArithCtx* gbContext,
+      IFX_Pause* pPause);
+  FXCODEC_STATUS decode_Arith_Template3_opt3(CJBig2_Image* pImage,
+                                             CJBig2_ArithDecoder* pArithDecoder,
+                                             JBig2ArithCtx* gbContext,
+                                             IFX_Pause* pPause);
+  FXCODEC_STATUS decode_Arith_Template3_unopt(
+      CJBig2_Image* pImage,
+      CJBig2_ArithDecoder* pArithDecoder,
+      JBig2ArithCtx* gbContext,
+      IFX_Pause* pPause);
+  CJBig2_Image* decode_Arith_Template0_opt3(CJBig2_ArithDecoder* pArithDecoder,
+                                            JBig2ArithCtx* gbContext);
+
+  CJBig2_Image* decode_Arith_Template0_unopt(CJBig2_ArithDecoder* pArithDecoder,
+                                             JBig2ArithCtx* gbContext);
+
+  CJBig2_Image* decode_Arith_Template1_opt3(CJBig2_ArithDecoder* pArithDecoder,
+                                            JBig2ArithCtx* gbContext);
+
+  CJBig2_Image* decode_Arith_Template1_unopt(CJBig2_ArithDecoder* pArithDecoder,
+                                             JBig2ArithCtx* gbContext);
+
+  CJBig2_Image* decode_Arith_Template2_opt3(CJBig2_ArithDecoder* pArithDecoder,
+                                            JBig2ArithCtx* gbContext);
+
+  CJBig2_Image* decode_Arith_Template2_unopt(CJBig2_ArithDecoder* pArithDecoder,
+                                             JBig2ArithCtx* gbContext);
+
+  CJBig2_Image* decode_Arith_Template3_opt3(CJBig2_ArithDecoder* pArithDecoder,
+                                            JBig2ArithCtx* gbContext);
+
+  CJBig2_Image* decode_Arith_Template3_unopt(CJBig2_ArithDecoder* pArithDecoder,
+                                             JBig2ArithCtx* gbContext);
+
+  FX_DWORD m_loopIndex;
+  uint8_t* m_pLine;
+  IFX_Pause* m_pPause;
+  FXCODEC_STATUS m_ProssiveStatus;
+  CJBig2_Image** m_pImage;
+  CJBig2_ArithDecoder* m_pArithDecoder;
+  JBig2ArithCtx* m_gbContext;
+  FX_WORD m_DecodeType;
+  FX_BOOL LTP;
+  FX_RECT m_ReplaceRect;
+};
+
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_GRDPROC_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_GrrdProc.cpp b/core/src/fxcodec/jbig2/JBig2_GrrdProc.cpp
new file mode 100644
index 0000000000..916683c8aa
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_GrrdProc.cpp
@@ -0,0 +1,515 @@
+// Copyright 2015 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 "JBig2_GrrdProc.h"
+
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "JBig2_ArithDecoder.h"
+#include "JBig2_BitStream.h"
+#include "JBig2_Image.h"
+
+CJBig2_Image* CJBig2_GRRDProc::decode(CJBig2_ArithDecoder* pArithDecoder,
+                                      JBig2ArithCtx* grContext) {
+  if (GRW == 0 || GRH == 0)
+    return new CJBig2_Image(GRW, GRH);
+
+  if (GRTEMPLATE == 0) {
+    if ((GRAT[0] == -1) && (GRAT[1] == -1) && (GRAT[2] == -1) &&
+        (GRAT[3] == -1) && (GRREFERENCEDX == 0) &&
+        (GRW == (FX_DWORD)GRREFERENCE->m_nWidth)) {
+      return decode_Template0_opt(pArithDecoder, grContext);
+    }
+    return decode_Template0_unopt(pArithDecoder, grContext);
+  }
+
+  if ((GRREFERENCEDX == 0) && (GRW == (FX_DWORD)GRREFERENCE->m_nWidth))
+    return decode_Template1_opt(pArithDecoder, grContext);
+  return decode_Template1_unopt(pArithDecoder, grContext);
+}
+
+CJBig2_Image* CJBig2_GRRDProc::decode_Template0_unopt(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* grContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2, line3, line4, line5;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
+  GRREG->fill(0);
+  for (FX_DWORD h = 0; h < GRH; h++) {
+    if (TPGRON) {
+      SLTP = pArithDecoder->DECODE(&grContext[0x0010]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 0) {
+      line1 = GRREG->getPixel(1, h - 1);
+      line1 |= GRREG->getPixel(0, h - 1) << 1;
+      line2 = 0;
+      line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1);
+      line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1)
+               << 1;
+      line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
+      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
+      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
+               << 2;
+      line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
+      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
+               << 1;
+      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1)
+               << 2;
+      for (FX_DWORD w = 0; w < GRW; w++) {
+        CONTEXT = line5;
+        CONTEXT |= line4 << 3;
+        CONTEXT |= line3 << 6;
+        CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2],
+                                         h - GRREFERENCEDY + GRAT[3])
+                   << 8;
+        CONTEXT |= line2 << 9;
+        CONTEXT |= line1 << 10;
+        CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12;
+        bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+        GRREG->setPixel(w, h, bVal);
+        line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03;
+        line2 = ((line2 << 1) | bVal) & 0x01;
+        line3 = ((line3 << 1) |
+                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+                                       h - GRREFERENCEDY - 1)) &
+                0x03;
+        line4 =
+            ((line4 << 1) |
+             GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
+            0x07;
+        line5 = ((line5 << 1) |
+                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+                                       h - GRREFERENCEDY + 1)) &
+                0x07;
+      }
+    } else {
+      line1 = GRREG->getPixel(1, h - 1);
+      line1 |= GRREG->getPixel(0, h - 1) << 1;
+      line2 = 0;
+      line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1);
+      line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1)
+               << 1;
+      line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
+      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
+      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
+               << 2;
+      line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
+      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
+               << 1;
+      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1)
+               << 2;
+      for (FX_DWORD w = 0; w < GRW; w++) {
+        bVal = GRREFERENCE->getPixel(w, h);
+        if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) &&
+              (bVal == GRREFERENCE->getPixel(w, h - 1)) &&
+              (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) &&
+              (bVal == GRREFERENCE->getPixel(w - 1, h)) &&
+              (bVal == GRREFERENCE->getPixel(w + 1, h)) &&
+              (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) &&
+              (bVal == GRREFERENCE->getPixel(w, h + 1)) &&
+              (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) {
+          CONTEXT = line5;
+          CONTEXT |= line4 << 3;
+          CONTEXT |= line3 << 6;
+          CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2],
+                                           h - GRREFERENCEDY + GRAT[3])
+                     << 8;
+          CONTEXT |= line2 << 9;
+          CONTEXT |= line1 << 10;
+          CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12;
+          bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+        }
+        GRREG->setPixel(w, h, bVal);
+        line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03;
+        line2 = ((line2 << 1) | bVal) & 0x01;
+        line3 = ((line3 << 1) |
+                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+                                       h - GRREFERENCEDY - 1)) &
+                0x03;
+        line4 =
+            ((line4 << 1) |
+             GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
+            0x07;
+        line5 = ((line5 << 1) |
+                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+                                       h - GRREFERENCEDY + 1)) &
+                0x07;
+      }
+    }
+  }
+  return GRREG.release();
+}
+
+CJBig2_Image* CJBig2_GRRDProc::decode_Template0_opt(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* grContext) {
+  if (!GRREFERENCE->m_pData)
+    return nullptr;
+
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line1_r, line2_r, line3_r;
+  uint8_t* pLine, *pLineR, cVal;
+  intptr_t nStride, nStrideR, nOffset;
+  int32_t k, nBits;
+  int32_t GRWR, GRHR;
+  int32_t GRW, GRH;
+  GRW = (int32_t)CJBig2_GRRDProc::GRW;
+  GRH = (int32_t)CJBig2_GRRDProc::GRH;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
+  if (!GRREG->m_pData)
+    return nullptr;
+
+  pLine = GRREG->m_pData;
+  pLineR = GRREFERENCE->m_pData;
+  nStride = GRREG->m_nStride;
+  nStrideR = GRREFERENCE->m_nStride;
+  GRWR = (int32_t)GRREFERENCE->m_nWidth;
+  GRHR = (int32_t)GRREFERENCE->m_nHeight;
+  if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) {
+    GRREFERENCEDY = 0;
+  }
+  nOffset = -GRREFERENCEDY * nStrideR;
+  for (int32_t h = 0; h < GRH; h++) {
+    if (TPGRON) {
+      SLTP = pArithDecoder->DECODE(&grContext[0x0010]);
+      LTP = LTP ^ SLTP;
+    }
+    line1 = (h > 0) ? pLine[-nStride] << 4 : 0;
+    int32_t reference_h = h - GRREFERENCEDY;
+    FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1);
+    FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR);
+    FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1);
+    line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0;
+    line2_r = line2_r_ok ? pLineR[nOffset] : 0;
+    line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0;
+    if (LTP == 0) {
+      CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) |
+                ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007);
+      for (int32_t w = 0; w < GRW; w += 8) {
+        nBits = GRW - w > 8 ? 8 : GRW - w;
+        if (h > 0)
+          line1 = (line1 << 8) |
+                  (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0);
+        if (h > GRHR + GRREFERENCEDY + 1) {
+          line1_r = 0;
+          line2_r = 0;
+          line3_r = 0;
+        } else {
+          if (line1_r_ok)
+            line1_r =
+                (line1_r << 8) |
+                (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
+          if (line2_r_ok)
+            line2_r = (line2_r << 8) |
+                      (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
+          if (line3_r_ok) {
+            line3_r =
+                (line3_r << 8) |
+                (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
+          } else {
+            line3_r = 0;
+          }
+        }
+        cVal = 0;
+        for (k = 0; k < nBits; k++) {
+          bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) |
+                    ((line1 >> (7 - k)) & 0x0400) |
+                    ((line1_r >> (7 - k)) & 0x0040) |
+                    ((line2_r >> (10 - k)) & 0x0008) |
+                    ((line3_r >> (13 - k)) & 0x0001);
+        }
+        pLine[w >> 3] = cVal;
+      }
+    } else {
+      CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) |
+                ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007);
+      for (int32_t w = 0; w < GRW; w += 8) {
+        nBits = GRW - w > 8 ? 8 : GRW - w;
+        if (h > 0)
+          line1 = (line1 << 8) |
+                  (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0);
+        if (line1_r_ok)
+          line1_r =
+              (line1_r << 8) |
+              (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
+        if (line2_r_ok)
+          line2_r = (line2_r << 8) |
+                    (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
+        if (line3_r_ok) {
+          line3_r =
+              (line3_r << 8) |
+              (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
+        } else {
+          line3_r = 0;
+        }
+        cVal = 0;
+        for (k = 0; k < nBits; k++) {
+          bVal = GRREFERENCE->getPixel(w + k, h);
+          if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k, h - 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k - 1, h)) &&
+                (bVal == GRREFERENCE->getPixel(w + k + 1, h)) &&
+                (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k, h + 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) {
+            bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+          }
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) |
+                    ((line1 >> (7 - k)) & 0x0400) |
+                    ((line1_r >> (7 - k)) & 0x0040) |
+                    ((line2_r >> (10 - k)) & 0x0008) |
+                    ((line3_r >> (13 - k)) & 0x0001);
+        }
+        pLine[w >> 3] = cVal;
+      }
+    }
+    pLine += nStride;
+    if (h < GRHR + GRREFERENCEDY) {
+      pLineR += nStrideR;
+    }
+  }
+  return GRREG.release();
+}
+
+CJBig2_Image* CJBig2_GRRDProc::decode_Template1_unopt(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* grContext) {
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line2, line3, line4, line5;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
+  GRREG->fill(0);
+  for (FX_DWORD h = 0; h < GRH; h++) {
+    if (TPGRON) {
+      SLTP = pArithDecoder->DECODE(&grContext[0x0008]);
+      LTP = LTP ^ SLTP;
+    }
+    if (LTP == 0) {
+      line1 = GRREG->getPixel(1, h - 1);
+      line1 |= GRREG->getPixel(0, h - 1) << 1;
+      line1 |= GRREG->getPixel(-1, h - 1) << 2;
+      line2 = 0;
+      line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1);
+      line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
+      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
+      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
+               << 2;
+      line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
+      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
+               << 1;
+      for (FX_DWORD w = 0; w < GRW; w++) {
+        CONTEXT = line5;
+        CONTEXT |= line4 << 2;
+        CONTEXT |= line3 << 5;
+        CONTEXT |= line2 << 6;
+        CONTEXT |= line1 << 7;
+        bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+        GRREG->setPixel(w, h, bVal);
+        line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07;
+        line2 = ((line2 << 1) | bVal) & 0x01;
+        line3 = ((line3 << 1) |
+                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 1,
+                                       h - GRREFERENCEDY - 1)) &
+                0x01;
+        line4 =
+            ((line4 << 1) |
+             GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
+            0x07;
+        line5 = ((line5 << 1) |
+                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+                                       h - GRREFERENCEDY + 1)) &
+                0x03;
+      }
+    } else {
+      line1 = GRREG->getPixel(1, h - 1);
+      line1 |= GRREG->getPixel(0, h - 1) << 1;
+      line1 |= GRREG->getPixel(-1, h - 1) << 2;
+      line2 = 0;
+      line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1);
+      line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
+      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
+      line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
+               << 2;
+      line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
+      line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
+               << 1;
+      for (FX_DWORD w = 0; w < GRW; w++) {
+        bVal = GRREFERENCE->getPixel(w, h);
+        if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) &&
+              (bVal == GRREFERENCE->getPixel(w, h - 1)) &&
+              (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) &&
+              (bVal == GRREFERENCE->getPixel(w - 1, h)) &&
+              (bVal == GRREFERENCE->getPixel(w + 1, h)) &&
+              (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) &&
+              (bVal == GRREFERENCE->getPixel(w, h + 1)) &&
+              (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) {
+          CONTEXT = line5;
+          CONTEXT |= line4 << 2;
+          CONTEXT |= line3 << 5;
+          CONTEXT |= line2 << 6;
+          CONTEXT |= line1 << 7;
+          bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+        }
+        GRREG->setPixel(w, h, bVal);
+        line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07;
+        line2 = ((line2 << 1) | bVal) & 0x01;
+        line3 = ((line3 << 1) |
+                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 1,
+                                       h - GRREFERENCEDY - 1)) &
+                0x01;
+        line4 =
+            ((line4 << 1) |
+             GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
+            0x07;
+        line5 = ((line5 << 1) |
+                 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+                                       h - GRREFERENCEDY + 1)) &
+                0x03;
+      }
+    }
+  }
+  return GRREG.release();
+}
+
+CJBig2_Image* CJBig2_GRRDProc::decode_Template1_opt(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* grContext) {
+  if (!GRREFERENCE->m_pData)
+    return nullptr;
+
+  FX_BOOL LTP, SLTP, bVal;
+  FX_DWORD CONTEXT;
+  FX_DWORD line1, line1_r, line2_r, line3_r;
+  uint8_t* pLine, *pLineR, cVal;
+  intptr_t nStride, nStrideR, nOffset;
+  int32_t k, nBits;
+  int32_t GRWR, GRHR;
+  int32_t GRW, GRH;
+  GRW = (int32_t)CJBig2_GRRDProc::GRW;
+  GRH = (int32_t)CJBig2_GRRDProc::GRH;
+  LTP = 0;
+  nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
+  if (!GRREG->m_pData)
+    return nullptr;
+
+  pLine = GRREG->m_pData;
+  pLineR = GRREFERENCE->m_pData;
+  nStride = GRREG->m_nStride;
+  nStrideR = GRREFERENCE->m_nStride;
+  GRWR = (int32_t)GRREFERENCE->m_nWidth;
+  GRHR = (int32_t)GRREFERENCE->m_nHeight;
+  if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) {
+    GRREFERENCEDY = 0;
+  }
+  nOffset = -GRREFERENCEDY * nStrideR;
+  for (int32_t h = 0; h < GRH; h++) {
+    if (TPGRON) {
+      SLTP = pArithDecoder->DECODE(&grContext[0x0008]);
+      LTP = LTP ^ SLTP;
+    }
+    line1 = (h > 0) ? pLine[-nStride] << 1 : 0;
+    int32_t reference_h = h - GRREFERENCEDY;
+    FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1);
+    FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR);
+    FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1);
+    line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0;
+    line2_r = line2_r_ok ? pLineR[nOffset] : 0;
+    line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0;
+    if (LTP == 0) {
+      CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) |
+                ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003);
+      for (int32_t w = 0; w < GRW; w += 8) {
+        nBits = GRW - w > 8 ? 8 : GRW - w;
+        if (h > 0)
+          line1 = (line1 << 8) |
+                  (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0);
+        if (line1_r_ok)
+          line1_r =
+              (line1_r << 8) |
+              (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
+        if (line2_r_ok)
+          line2_r = (line2_r << 8) |
+                    (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
+        if (line3_r_ok) {
+          line3_r =
+              (line3_r << 8) |
+              (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
+        } else {
+          line3_r = 0;
+        }
+        cVal = 0;
+        for (k = 0; k < nBits; k++) {
+          bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) |
+                    ((line1 >> (7 - k)) & 0x0080) |
+                    ((line1_r >> (9 - k)) & 0x0020) |
+                    ((line2_r >> (11 - k)) & 0x0004) |
+                    ((line3_r >> (13 - k)) & 0x0001);
+        }
+        pLine[w >> 3] = cVal;
+      }
+    } else {
+      CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) |
+                ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003);
+      for (int32_t w = 0; w < GRW; w += 8) {
+        nBits = GRW - w > 8 ? 8 : GRW - w;
+        if (h > 0)
+          line1 = (line1 << 8) |
+                  (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0);
+        if (line1_r_ok)
+          line1_r =
+              (line1_r << 8) |
+              (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
+        if (line2_r_ok)
+          line2_r = (line2_r << 8) |
+                    (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
+        if (line3_r_ok) {
+          line3_r =
+              (line3_r << 8) |
+              (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
+        } else {
+          line3_r = 0;
+        }
+        cVal = 0;
+        for (k = 0; k < nBits; k++) {
+          bVal = GRREFERENCE->getPixel(w + k, h);
+          if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k, h - 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k - 1, h)) &&
+                (bVal == GRREFERENCE->getPixel(w + k + 1, h)) &&
+                (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k, h + 1)) &&
+                (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) {
+            bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+          }
+          cVal |= bVal << (7 - k);
+          CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) |
+                    ((line1 >> (7 - k)) & 0x0080) |
+                    ((line1_r >> (9 - k)) & 0x0020) |
+                    ((line2_r >> (11 - k)) & 0x0004) |
+                    ((line3_r >> (13 - k)) & 0x0001);
+        }
+        pLine[w >> 3] = cVal;
+      }
+    }
+    pLine += nStride;
+    if (h < GRHR + GRREFERENCEDY) {
+      pLineR += nStrideR;
+    }
+  }
+  return GRREG.release();
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_GrrdProc.h b/core/src/fxcodec/jbig2/JBig2_GrrdProc.h
new file mode 100644
index 0000000000..e6ebffaae4
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_GrrdProc.h
@@ -0,0 +1,44 @@
+// Copyright 2015 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_SRC_FXCODEC_JBIG2_JBIG2_GRRDPROC_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_GRRDPROC_H_
+
+#include "../../../core/include/fxcrt/fx_system.h"
+
+class CJBig2_ArithDecoder;
+class CJBig2_Image;
+class IFX_Pause;
+struct JBig2ArithCtx;
+
+class CJBig2_GRRDProc {
+ public:
+  CJBig2_Image* decode(CJBig2_ArithDecoder* pArithDecoder,
+                       JBig2ArithCtx* grContext);
+
+  CJBig2_Image* decode_Template0_unopt(CJBig2_ArithDecoder* pArithDecoder,
+                                       JBig2ArithCtx* grContext);
+
+  CJBig2_Image* decode_Template0_opt(CJBig2_ArithDecoder* pArithDecoder,
+                                     JBig2ArithCtx* grContext);
+
+  CJBig2_Image* decode_Template1_unopt(CJBig2_ArithDecoder* pArithDecoder,
+                                       JBig2ArithCtx* grContext);
+
+  CJBig2_Image* decode_Template1_opt(CJBig2_ArithDecoder* pArithDecoder,
+                                     JBig2ArithCtx* grContext);
+
+  FX_DWORD GRW;
+  FX_DWORD GRH;
+  FX_BOOL GRTEMPLATE;
+  CJBig2_Image* GRREFERENCE;
+  int32_t GRREFERENCEDX;
+  int32_t GRREFERENCEDY;
+  FX_BOOL TPGRON;
+  int8_t GRAT[4];
+};
+
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_GRRDPROC_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_GsidProc.cpp b/core/src/fxcodec/jbig2/JBig2_GsidProc.cpp
new file mode 100644
index 0000000000..b97a212926
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_GsidProc.cpp
@@ -0,0 +1,150 @@
+// Copyright 2015 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 "JBig2_GsidProc.h"
+
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "../../../include/fxcrt/fx_basic.h"
+#include "JBig2_BitStream.h"
+#include "JBig2_GrdProc.h"
+#include "JBig2_Image.h"
+
+FX_DWORD* CJBig2_GSIDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                                        JBig2ArithCtx* gbContext,
+                                        IFX_Pause* pPause) {
+  CJBig2_Image** GSPLANES;
+  int32_t J, K;
+  FX_DWORD x, y;
+  FX_DWORD* GSVALS;
+  GSPLANES = FX_Alloc(CJBig2_Image*, GSBPP);
+  GSVALS = FX_Alloc2D(FX_DWORD, GSW, GSH);
+  JBIG2_memset(GSPLANES, 0, sizeof(CJBig2_Image*) * GSBPP);
+  JBIG2_memset(GSVALS, 0, sizeof(FX_DWORD) * GSW * GSH);
+
+  nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
+  pGRD->MMR = GSMMR;
+  pGRD->GBW = GSW;
+  pGRD->GBH = GSH;
+  pGRD->GBTEMPLATE = GSTEMPLATE;
+  pGRD->TPGDON = 0;
+  pGRD->USESKIP = GSUSESKIP;
+  pGRD->SKIP = GSKIP;
+  if (GSTEMPLATE <= 1) {
+    pGRD->GBAT[0] = 3;
+  } else {
+    pGRD->GBAT[0] = 2;
+  }
+  pGRD->GBAT[1] = -1;
+  if (pGRD->GBTEMPLATE == 0) {
+    pGRD->GBAT[2] = -3;
+    pGRD->GBAT[3] = -1;
+    pGRD->GBAT[4] = 2;
+    pGRD->GBAT[5] = -2;
+    pGRD->GBAT[6] = -2;
+    pGRD->GBAT[7] = -2;
+  }
+  FXCODEC_STATUS status = pGRD->Start_decode_Arith(
+      &GSPLANES[GSBPP - 1], pArithDecoder, gbContext, nullptr);
+  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+    pGRD->Continue_decode(pPause);
+  }
+  if (!GSPLANES[GSBPP - 1]) {
+    goto failed;
+  }
+  J = GSBPP - 2;
+  while (J >= 0) {
+    FXCODEC_STATUS status = pGRD->Start_decode_Arith(
+        &GSPLANES[J], pArithDecoder, gbContext, nullptr);
+    while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+      pGRD->Continue_decode(pPause);
+    }
+    if (!GSPLANES[J]) {
+      for (K = GSBPP - 1; K > J; K--) {
+        delete GSPLANES[K];
+        goto failed;
+      }
+    }
+    GSPLANES[J]->composeFrom(0, 0, GSPLANES[J + 1], JBIG2_COMPOSE_XOR);
+    J = J - 1;
+  }
+  for (y = 0; y < GSH; y++) {
+    for (x = 0; x < GSW; x++) {
+      for (J = 0; J < GSBPP; J++) {
+        GSVALS[y * GSW + x] |= GSPLANES[J]->getPixel(x, y) << J;
+      }
+    }
+  }
+  for (J = 0; J < GSBPP; J++) {
+    delete GSPLANES[J];
+  }
+  FX_Free(GSPLANES);
+  return GSVALS;
+failed:
+  FX_Free(GSPLANES);
+  FX_Free(GSVALS);
+  return nullptr;
+}
+
+FX_DWORD* CJBig2_GSIDProc::decode_MMR(CJBig2_BitStream* pStream,
+                                      IFX_Pause* pPause) {
+  CJBig2_Image** GSPLANES;
+  int32_t J, K;
+  FX_DWORD x, y;
+  FX_DWORD* GSVALS;
+  GSPLANES = FX_Alloc(CJBig2_Image*, GSBPP);
+  GSVALS = FX_Alloc2D(FX_DWORD, GSW, GSH);
+  JBIG2_memset(GSPLANES, 0, sizeof(CJBig2_Image*) * GSBPP);
+  JBIG2_memset(GSVALS, 0, sizeof(FX_DWORD) * GSW * GSH);
+
+  nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
+  pGRD->MMR = GSMMR;
+  pGRD->GBW = GSW;
+  pGRD->GBH = GSH;
+  FXCODEC_STATUS status =
+      pGRD->Start_decode_MMR(&GSPLANES[GSBPP - 1], pStream, nullptr);
+  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+    pGRD->Continue_decode(pPause);
+  }
+  if (!GSPLANES[GSBPP - 1]) {
+    goto failed;
+  }
+  pStream->alignByte();
+  pStream->offset(3);
+  J = GSBPP - 2;
+  while (J >= 0) {
+    FXCODEC_STATUS status =
+        pGRD->Start_decode_MMR(&GSPLANES[J], pStream, nullptr);
+    while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+      pGRD->Continue_decode(pPause);
+    }
+    if (!GSPLANES[J]) {
+      for (K = GSBPP - 1; K > J; K--) {
+        delete GSPLANES[K];
+        goto failed;
+      }
+    }
+    pStream->alignByte();
+    pStream->offset(3);
+    GSPLANES[J]->composeFrom(0, 0, GSPLANES[J + 1], JBIG2_COMPOSE_XOR);
+    J = J - 1;
+  }
+  for (y = 0; y < GSH; y++) {
+    for (x = 0; x < GSW; x++) {
+      for (J = 0; J < GSBPP; J++) {
+        GSVALS[y * GSW + x] |= GSPLANES[J]->getPixel(x, y) << J;
+      }
+    }
+  }
+  for (J = 0; J < GSBPP; J++) {
+    delete GSPLANES[J];
+  }
+  FX_Free(GSPLANES);
+  return GSVALS;
+failed:
+  FX_Free(GSPLANES);
+  FX_Free(GSVALS);
+  return nullptr;
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_GsidProc.h b/core/src/fxcodec/jbig2/JBig2_GsidProc.h
new file mode 100644
index 0000000000..230c736dad
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_GsidProc.h
@@ -0,0 +1,36 @@
+// Copyright 2015 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_SRC_FXCODEC_JBIG2_JBIG2_GSIDPROC_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_GSIDPROC_H_
+
+#include "../../../core/include/fxcrt/fx_system.h"
+
+class CJBig2_ArithDecoder;
+class CJBig2_BitStream;
+class CJBig2_Image;
+class IFX_Pause;
+struct JBig2ArithCtx;
+
+class CJBig2_GSIDProc {
+ public:
+  FX_DWORD* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                         JBig2ArithCtx* gbContext,
+                         IFX_Pause* pPause);
+
+  FX_DWORD* decode_MMR(CJBig2_BitStream* pStream, IFX_Pause* pPause);
+
+ public:
+  FX_BOOL GSMMR;
+  FX_BOOL GSUSESKIP;
+  uint8_t GSBPP;
+  FX_DWORD GSW;
+  FX_DWORD GSH;
+  uint8_t GSTEMPLATE;
+  CJBig2_Image* GSKIP;
+};
+
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_GSIDPROC_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_HtrdProc.cpp b/core/src/fxcodec/jbig2/JBig2_HtrdProc.cpp
new file mode 100644
index 0000000000..a5a8b7abfe
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_HtrdProc.cpp
@@ -0,0 +1,103 @@
+// Copyright 2015 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 "JBig2_HtrdProc.h"
+
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "../../../include/fxcrt/fx_basic.h"
+#include "JBig2_GsidProc.h"
+
+CJBig2_Image* CJBig2_HTRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                                            JBig2ArithCtx* gbContext,
+                                            IFX_Pause* pPause) {
+  FX_DWORD ng, mg;
+  int32_t x, y;
+  FX_DWORD HBPP;
+  FX_DWORD* GI;
+  nonstd::unique_ptr<CJBig2_Image> HSKIP;
+  nonstd::unique_ptr<CJBig2_Image> HTREG(new CJBig2_Image(HBW, HBH));
+  HTREG->fill(HDEFPIXEL);
+  if (HENABLESKIP == 1) {
+    HSKIP.reset(new CJBig2_Image(HGW, HGH));
+    for (mg = 0; mg < HGH; mg++) {
+      for (ng = 0; ng < HGW; ng++) {
+        x = (HGX + mg * HRY + ng * HRX) >> 8;
+        y = (HGY + mg * HRX - ng * HRY) >> 8;
+        if ((x + HPW <= 0) | (x >= (int32_t)HBW) | (y + HPH <= 0) |
+            (y >= (int32_t)HPH)) {
+          HSKIP->setPixel(ng, mg, 1);
+        } else {
+          HSKIP->setPixel(ng, mg, 0);
+        }
+      }
+    }
+  }
+  HBPP = 1;
+  while ((FX_DWORD)(1 << HBPP) < HNUMPATS) {
+    HBPP++;
+  }
+  nonstd::unique_ptr<CJBig2_GSIDProc> pGID(new CJBig2_GSIDProc());
+  pGID->GSMMR = HMMR;
+  pGID->GSW = HGW;
+  pGID->GSH = HGH;
+  pGID->GSBPP = (uint8_t)HBPP;
+  pGID->GSUSESKIP = HENABLESKIP;
+  pGID->GSKIP = HSKIP.get();
+  pGID->GSTEMPLATE = HTEMPLATE;
+  GI = pGID->decode_Arith(pArithDecoder, gbContext, pPause);
+  if (!GI)
+    return nullptr;
+
+  for (mg = 0; mg < HGH; mg++) {
+    for (ng = 0; ng < HGW; ng++) {
+      x = (HGX + mg * HRY + ng * HRX) >> 8;
+      y = (HGY + mg * HRX - ng * HRY) >> 8;
+      FX_DWORD pat_index = GI[mg * HGW + ng];
+      if (pat_index >= HNUMPATS) {
+        pat_index = HNUMPATS - 1;
+      }
+      HTREG->composeFrom(x, y, HPATS[pat_index], HCOMBOP);
+    }
+  }
+  FX_Free(GI);
+  return HTREG.release();
+}
+
+CJBig2_Image* CJBig2_HTRDProc::decode_MMR(CJBig2_BitStream* pStream,
+                                          IFX_Pause* pPause) {
+  FX_DWORD ng, mg;
+  int32_t x, y;
+  FX_DWORD* GI;
+  nonstd::unique_ptr<CJBig2_Image> HTREG(new CJBig2_Image(HBW, HBH));
+  HTREG->fill(HDEFPIXEL);
+  FX_DWORD HBPP = 1;
+  while ((FX_DWORD)(1 << HBPP) < HNUMPATS) {
+    HBPP++;
+  }
+  nonstd::unique_ptr<CJBig2_GSIDProc> pGID(new CJBig2_GSIDProc());
+  pGID->GSMMR = HMMR;
+  pGID->GSW = HGW;
+  pGID->GSH = HGH;
+  pGID->GSBPP = (uint8_t)HBPP;
+  pGID->GSUSESKIP = 0;
+  GI = pGID->decode_MMR(pStream, pPause);
+  if (!GI)
+    return nullptr;
+
+  for (mg = 0; mg < HGH; mg++) {
+    for (ng = 0; ng < HGW; ng++) {
+      x = (HGX + mg * HRY + ng * HRX) >> 8;
+      y = (HGY + mg * HRX - ng * HRY) >> 8;
+      FX_DWORD pat_index = GI[mg * HGW + ng];
+      if (pat_index >= HNUMPATS) {
+        pat_index = HNUMPATS - 1;
+      }
+      HTREG->composeFrom(x, y, HPATS[pat_index], HCOMBOP);
+    }
+  }
+  FX_Free(GI);
+  return HTREG.release();
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_HtrdProc.h b/core/src/fxcodec/jbig2/JBig2_HtrdProc.h
new file mode 100644
index 0000000000..bea9494158
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_HtrdProc.h
@@ -0,0 +1,47 @@
+// Copyright 2015 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_SRC_FXCODEC_JBIG2_JBIG2_HTRDPROC_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_HTRDPROC_H_
+
+#include "../../../core/include/fxcrt/fx_system.h"
+
+#include "JBig2_Image.h"
+
+class CJBig2_ArithDecoder;
+class CJBig2_BitStream;
+class IFX_Pause;
+struct JBig2ArithCtx;
+
+class CJBig2_HTRDProc {
+ public:
+  CJBig2_Image* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                             JBig2ArithCtx* gbContext,
+                             IFX_Pause* pPause);
+
+  CJBig2_Image* decode_MMR(CJBig2_BitStream* pStream, IFX_Pause* pPause);
+
+ public:
+  FX_DWORD HBW;
+  FX_DWORD HBH;
+  FX_BOOL HMMR;
+  uint8_t HTEMPLATE;
+  FX_DWORD HNUMPATS;
+  CJBig2_Image** HPATS;
+  FX_BOOL HDEFPIXEL;
+  JBig2ComposeOp HCOMBOP;
+  FX_BOOL HENABLESKIP;
+  FX_DWORD HGW;
+  FX_DWORD HGH;
+  int32_t HGX;
+  int32_t HGY;
+  FX_WORD HRX;
+  FX_WORD HRY;
+  uint8_t HPW;
+  uint8_t HPH;
+};
+
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_HTRDPROC_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_PddProc.cpp b/core/src/fxcodec/jbig2/JBig2_PddProc.cpp
new file mode 100644
index 0000000000..56443a01d2
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_PddProc.cpp
@@ -0,0 +1,86 @@
+// Copyright 2015 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 "JBig2_PddProc.h"
+
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "JBig2_GrdProc.h"
+#include "JBig2_Image.h"
+#include "JBig2_PatternDict.h"
+
+CJBig2_PatternDict* CJBig2_PDDProc::decode_Arith(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    IFX_Pause* pPause) {
+  FX_DWORD GRAY;
+  CJBig2_Image* BHDC = nullptr;
+  nonstd::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict());
+  pDict->NUMPATS = GRAYMAX + 1;
+  pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS);
+  JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS);
+
+  nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
+  pGRD->MMR = HDMMR;
+  pGRD->GBW = (GRAYMAX + 1) * HDPW;
+  pGRD->GBH = HDPH;
+  pGRD->GBTEMPLATE = HDTEMPLATE;
+  pGRD->TPGDON = 0;
+  pGRD->USESKIP = 0;
+  pGRD->GBAT[0] = -(int32_t)HDPW;
+  pGRD->GBAT[1] = 0;
+  if (pGRD->GBTEMPLATE == 0) {
+    pGRD->GBAT[2] = -3;
+    pGRD->GBAT[3] = -1;
+    pGRD->GBAT[4] = 2;
+    pGRD->GBAT[5] = -2;
+    pGRD->GBAT[6] = -2;
+    pGRD->GBAT[7] = -2;
+  }
+  FXCODEC_STATUS status =
+      pGRD->Start_decode_Arith(&BHDC, pArithDecoder, gbContext, nullptr);
+  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+    pGRD->Continue_decode(pPause);
+  }
+  if (!BHDC)
+    return nullptr;
+
+  GRAY = 0;
+  while (GRAY <= GRAYMAX) {
+    pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH);
+    GRAY = GRAY + 1;
+  }
+  delete BHDC;
+  return pDict.release();
+}
+
+CJBig2_PatternDict* CJBig2_PDDProc::decode_MMR(CJBig2_BitStream* pStream,
+                                               IFX_Pause* pPause) {
+  FX_DWORD GRAY;
+  CJBig2_Image* BHDC = nullptr;
+  nonstd::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict());
+  pDict->NUMPATS = GRAYMAX + 1;
+  pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS);
+  JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS);
+
+  nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
+  pGRD->MMR = HDMMR;
+  pGRD->GBW = (GRAYMAX + 1) * HDPW;
+  pGRD->GBH = HDPH;
+  FXCODEC_STATUS status = pGRD->Start_decode_MMR(&BHDC, pStream, nullptr);
+  while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+    pGRD->Continue_decode(pPause);
+  }
+  if (!BHDC)
+    return nullptr;
+
+  GRAY = 0;
+  while (GRAY <= GRAYMAX) {
+    pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH);
+    GRAY = GRAY + 1;
+  }
+  delete BHDC;
+  return pDict.release();
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_PddProc.h b/core/src/fxcodec/jbig2/JBig2_PddProc.h
new file mode 100644
index 0000000000..59261555c0
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_PddProc.h
@@ -0,0 +1,34 @@
+// Copyright 2015 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_SRC_FXCODEC_JBIG2_JBIG2_PDDPROC_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_PDDPROC_H_
+
+#include "../../../core/include/fxcrt/fx_system.h"
+
+class CJBig2_ArithDecoder;
+class CJBig2_BitStream;
+class CJBig2_PatternDict;
+class IFX_Pause;
+struct JBig2ArithCtx;
+
+class CJBig2_PDDProc {
+ public:
+  CJBig2_PatternDict* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                                   JBig2ArithCtx* gbContext,
+                                   IFX_Pause* pPause);
+
+  CJBig2_PatternDict* decode_MMR(CJBig2_BitStream* pStream, IFX_Pause* pPause);
+
+ public:
+  FX_BOOL HDMMR;
+  uint8_t HDPW;
+  uint8_t HDPH;
+  FX_DWORD GRAYMAX;
+  uint8_t HDTEMPLATE;
+};
+
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_PDDPROC_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_SddProc.cpp b/core/src/fxcodec/jbig2/JBig2_SddProc.cpp
new file mode 100644
index 0000000000..ae5635b462
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_SddProc.cpp
@@ -0,0 +1,651 @@
+// Copyright 2015 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 "JBig2_SddProc.h"
+
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "../../../include/fxcrt/fx_basic.h"
+#include "JBig2_ArithIntDecoder.h"
+#include "JBig2_GrdProc.h"
+#include "JBig2_GrrdProc.h"
+#include "JBig2_HuffmanDecoder.h"
+#include "JBig2_HuffmanTable.h"
+#include "JBig2_SymbolDict.h"
+#include "JBig2_TrdProc.h"
+
+CJBig2_SymbolDict* CJBig2_SDDProc::decode_Arith(
+    CJBig2_ArithDecoder* pArithDecoder,
+    JBig2ArithCtx* gbContext,
+    JBig2ArithCtx* grContext) {
+  CJBig2_Image** SDNEWSYMS;
+  FX_DWORD HCHEIGHT, NSYMSDECODED;
+  int32_t HCDH;
+  FX_DWORD SYMWIDTH, TOTWIDTH;
+  int32_t DW;
+  CJBig2_Image* BS;
+  FX_DWORD I, J, REFAGGNINST;
+  FX_BOOL* EXFLAGS;
+  FX_DWORD EXINDEX;
+  FX_BOOL CUREXFLAG;
+  FX_DWORD EXRUNLENGTH;
+  int32_t nVal;
+  FX_DWORD nTmp;
+  FX_DWORD SBNUMSYMS;
+  uint8_t SBSYMCODELEN;
+  FX_DWORD IDI;
+  int32_t RDXI, RDYI;
+  CJBig2_Image** SBSYMS;
+  nonstd::unique_ptr<CJBig2_ArithIaidDecoder> IAID;
+  nonstd::unique_ptr<CJBig2_SymbolDict> pDict;
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IADH(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IADW(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IAAI(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARDX(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARDY(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IAEX(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IADT(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IAFS(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IADS(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IAIT(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARI(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARDW(new CJBig2_ArithIntDecoder);
+  nonstd::unique_ptr<CJBig2_ArithIntDecoder> IARDH(new CJBig2_ArithIntDecoder);
+  nTmp = 0;
+  while ((FX_DWORD)(1 << nTmp) < (SDNUMINSYMS + SDNUMNEWSYMS)) {
+    nTmp++;
+  }
+  IAID.reset(new CJBig2_ArithIaidDecoder((uint8_t)nTmp));
+  SDNEWSYMS = FX_Alloc(CJBig2_Image*, SDNUMNEWSYMS);
+  FXSYS_memset(SDNEWSYMS, 0, SDNUMNEWSYMS * sizeof(CJBig2_Image*));
+
+  HCHEIGHT = 0;
+  NSYMSDECODED = 0;
+  while (NSYMSDECODED < SDNUMNEWSYMS) {
+    BS = nullptr;
+    if (IADH->decode(pArithDecoder, &HCDH) == -1) {
+      goto failed;
+    }
+    HCHEIGHT = HCHEIGHT + HCDH;
+    if ((int)HCHEIGHT < 0 || (int)HCHEIGHT > JBIG2_MAX_IMAGE_SIZE) {
+      goto failed;
+    }
+    SYMWIDTH = 0;
+    TOTWIDTH = 0;
+    for (;;) {
+      nVal = IADW->decode(pArithDecoder, &DW);
+      if (nVal == JBIG2_OOB) {
+        break;
+      } else if (nVal != 0) {
+        goto failed;
+      } else {
+        if (NSYMSDECODED >= SDNUMNEWSYMS) {
+          goto failed;
+        }
+        SYMWIDTH = SYMWIDTH + DW;
+        if ((int)SYMWIDTH < 0 || (int)SYMWIDTH > JBIG2_MAX_IMAGE_SIZE) {
+          goto failed;
+        } else if (HCHEIGHT == 0 || SYMWIDTH == 0) {
+          TOTWIDTH = TOTWIDTH + SYMWIDTH;
+          SDNEWSYMS[NSYMSDECODED] = nullptr;
+          NSYMSDECODED = NSYMSDECODED + 1;
+          continue;
+        }
+        TOTWIDTH = TOTWIDTH + SYMWIDTH;
+      }
+      if (SDREFAGG == 0) {
+        nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
+        pGRD->MMR = 0;
+        pGRD->GBW = SYMWIDTH;
+        pGRD->GBH = HCHEIGHT;
+        pGRD->GBTEMPLATE = SDTEMPLATE;
+        pGRD->TPGDON = 0;
+        pGRD->USESKIP = 0;
+        pGRD->GBAT[0] = SDAT[0];
+        pGRD->GBAT[1] = SDAT[1];
+        pGRD->GBAT[2] = SDAT[2];
+        pGRD->GBAT[3] = SDAT[3];
+        pGRD->GBAT[4] = SDAT[4];
+        pGRD->GBAT[5] = SDAT[5];
+        pGRD->GBAT[6] = SDAT[6];
+        pGRD->GBAT[7] = SDAT[7];
+        BS = pGRD->decode_Arith(pArithDecoder, gbContext);
+        if (!BS) {
+          goto failed;
+        }
+      } else {
+        if (IAAI->decode(pArithDecoder, (int*)&REFAGGNINST) == -1) {
+          goto failed;
+        }
+        if (REFAGGNINST > 1) {
+          nonstd::unique_ptr<CJBig2_TRDProc> pDecoder(new CJBig2_TRDProc());
+          pDecoder->SBHUFF = SDHUFF;
+          pDecoder->SBREFINE = 1;
+          pDecoder->SBW = SYMWIDTH;
+          pDecoder->SBH = HCHEIGHT;
+          pDecoder->SBNUMINSTANCES = REFAGGNINST;
+          pDecoder->SBSTRIPS = 1;
+          pDecoder->SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
+          SBNUMSYMS = pDecoder->SBNUMSYMS;
+          nTmp = 0;
+          while ((FX_DWORD)(1 << nTmp) < SBNUMSYMS) {
+            nTmp++;
+          }
+          SBSYMCODELEN = (uint8_t)nTmp;
+          pDecoder->SBSYMCODELEN = SBSYMCODELEN;
+          SBSYMS = FX_Alloc(CJBig2_Image*, SBNUMSYMS);
+          JBIG2_memcpy(SBSYMS, SDINSYMS, SDNUMINSYMS * sizeof(CJBig2_Image*));
+          JBIG2_memcpy(SBSYMS + SDNUMINSYMS, SDNEWSYMS,
+                       NSYMSDECODED * sizeof(CJBig2_Image*));
+          pDecoder->SBSYMS = SBSYMS;
+          pDecoder->SBDEFPIXEL = 0;
+          pDecoder->SBCOMBOP = JBIG2_COMPOSE_OR;
+          pDecoder->TRANSPOSED = 0;
+          pDecoder->REFCORNER = JBIG2_CORNER_TOPLEFT;
+          pDecoder->SBDSOFFSET = 0;
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFFS(
+              new CJBig2_HuffmanTable(HuffmanTable_B6,
+                                      FX_ArraySize(HuffmanTable_B6),
+                                      HuffmanTable_HTOOB_B6));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFDS(
+              new CJBig2_HuffmanTable(HuffmanTable_B8,
+                                      FX_ArraySize(HuffmanTable_B8),
+                                      HuffmanTable_HTOOB_B8));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFDT(
+              new CJBig2_HuffmanTable(HuffmanTable_B11,
+                                      FX_ArraySize(HuffmanTable_B11),
+                                      HuffmanTable_HTOOB_B11));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDW(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDH(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDX(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDY(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRSIZE(
+              new CJBig2_HuffmanTable(HuffmanTable_B1,
+                                      FX_ArraySize(HuffmanTable_B1),
+                                      HuffmanTable_HTOOB_B1));
+          pDecoder->SBHUFFFS = SBHUFFFS.get();
+          pDecoder->SBHUFFDS = SBHUFFDS.get();
+          pDecoder->SBHUFFDT = SBHUFFDT.get();
+          pDecoder->SBHUFFRDW = SBHUFFRDW.get();
+          pDecoder->SBHUFFRDH = SBHUFFRDH.get();
+          pDecoder->SBHUFFRDX = SBHUFFRDX.get();
+          pDecoder->SBHUFFRDY = SBHUFFRDY.get();
+          pDecoder->SBHUFFRSIZE = SBHUFFRSIZE.get();
+          pDecoder->SBRTEMPLATE = SDRTEMPLATE;
+          pDecoder->SBRAT[0] = SDRAT[0];
+          pDecoder->SBRAT[1] = SDRAT[1];
+          pDecoder->SBRAT[2] = SDRAT[2];
+          pDecoder->SBRAT[3] = SDRAT[3];
+          JBig2IntDecoderState ids;
+          ids.IADT = IADT.get();
+          ids.IAFS = IAFS.get();
+          ids.IADS = IADS.get();
+          ids.IAIT = IAIT.get();
+          ids.IARI = IARI.get();
+          ids.IARDW = IARDW.get();
+          ids.IARDH = IARDH.get();
+          ids.IARDX = IARDX.get();
+          ids.IARDY = IARDY.get();
+          ids.IAID = IAID.get();
+          BS = pDecoder->decode_Arith(pArithDecoder, grContext, &ids);
+          if (!BS) {
+            FX_Free(SBSYMS);
+            goto failed;
+          }
+          FX_Free(SBSYMS);
+        } else if (REFAGGNINST == 1) {
+          SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
+          if (IAID->decode(pArithDecoder, (int*)&IDI) == -1) {
+            goto failed;
+          }
+          if ((IARDX->decode(pArithDecoder, &RDXI) == -1) ||
+              (IARDY->decode(pArithDecoder, &RDYI) == -1)) {
+            goto failed;
+          }
+          if (IDI >= SBNUMSYMS) {
+            goto failed;
+          }
+          SBSYMS = FX_Alloc(CJBig2_Image*, SBNUMSYMS);
+          JBIG2_memcpy(SBSYMS, SDINSYMS, SDNUMINSYMS * sizeof(CJBig2_Image*));
+          JBIG2_memcpy(SBSYMS + SDNUMINSYMS, SDNEWSYMS,
+                       NSYMSDECODED * sizeof(CJBig2_Image*));
+          if (!SBSYMS[IDI]) {
+            FX_Free(SBSYMS);
+            goto failed;
+          }
+          nonstd::unique_ptr<CJBig2_GRRDProc> pGRRD(new CJBig2_GRRDProc());
+          pGRRD->GRW = SYMWIDTH;
+          pGRRD->GRH = HCHEIGHT;
+          pGRRD->GRTEMPLATE = SDRTEMPLATE;
+          pGRRD->GRREFERENCE = SBSYMS[IDI];
+          pGRRD->GRREFERENCEDX = RDXI;
+          pGRRD->GRREFERENCEDY = RDYI;
+          pGRRD->TPGRON = 0;
+          pGRRD->GRAT[0] = SDRAT[0];
+          pGRRD->GRAT[1] = SDRAT[1];
+          pGRRD->GRAT[2] = SDRAT[2];
+          pGRRD->GRAT[3] = SDRAT[3];
+          BS = pGRRD->decode(pArithDecoder, grContext);
+          if (!BS) {
+            FX_Free(SBSYMS);
+            goto failed;
+          }
+          FX_Free(SBSYMS);
+        }
+      }
+      SDNEWSYMS[NSYMSDECODED] = BS;
+      BS = nullptr;
+      NSYMSDECODED = NSYMSDECODED + 1;
+    }
+  }
+  EXINDEX = 0;
+  CUREXFLAG = 0;
+  EXFLAGS = FX_Alloc(FX_BOOL, SDNUMINSYMS + SDNUMNEWSYMS);
+  while (EXINDEX < SDNUMINSYMS + SDNUMNEWSYMS) {
+    if (IAEX->decode(pArithDecoder, (int*)&EXRUNLENGTH) == -1) {
+      FX_Free(EXFLAGS);
+      goto failed;
+    }
+    if (EXINDEX + EXRUNLENGTH > SDNUMINSYMS + SDNUMNEWSYMS) {
+      FX_Free(EXFLAGS);
+      goto failed;
+    }
+    if (EXRUNLENGTH != 0) {
+      for (I = EXINDEX; I < EXINDEX + EXRUNLENGTH; I++) {
+        EXFLAGS[I] = CUREXFLAG;
+      }
+    }
+    EXINDEX = EXINDEX + EXRUNLENGTH;
+    CUREXFLAG = !CUREXFLAG;
+  }
+  pDict.reset(new CJBig2_SymbolDict);
+  pDict->SDNUMEXSYMS = SDNUMEXSYMS;
+  pDict->SDEXSYMS = FX_Alloc(CJBig2_Image*, SDNUMEXSYMS);
+  I = J = 0;
+  for (I = 0; I < SDNUMINSYMS + SDNUMNEWSYMS; I++) {
+    if (EXFLAGS[I] && J < SDNUMEXSYMS) {
+      if (I < SDNUMINSYMS) {
+        pDict->SDEXSYMS[J] = new CJBig2_Image(*SDINSYMS[I]);
+      } else {
+        pDict->SDEXSYMS[J] = SDNEWSYMS[I - SDNUMINSYMS];
+      }
+      J = J + 1;
+    } else if (!EXFLAGS[I] && I >= SDNUMINSYMS) {
+      delete SDNEWSYMS[I - SDNUMINSYMS];
+    }
+  }
+  if (J < SDNUMEXSYMS) {
+    pDict->SDNUMEXSYMS = J;
+  }
+  FX_Free(EXFLAGS);
+  FX_Free(SDNEWSYMS);
+  return pDict.release();
+failed:
+  for (I = 0; I < NSYMSDECODED; I++) {
+    if (SDNEWSYMS[I]) {
+      delete SDNEWSYMS[I];
+      SDNEWSYMS[I] = nullptr;
+    }
+  }
+  FX_Free(SDNEWSYMS);
+  return nullptr;
+}
+
+CJBig2_SymbolDict* CJBig2_SDDProc::decode_Huffman(CJBig2_BitStream* pStream,
+                                                  JBig2ArithCtx* gbContext,
+                                                  JBig2ArithCtx* grContext,
+                                                  IFX_Pause* pPause) {
+  CJBig2_Image** SDNEWSYMS;
+  FX_DWORD* SDNEWSYMWIDTHS;
+  FX_DWORD HCHEIGHT, NSYMSDECODED;
+  int32_t HCDH;
+  FX_DWORD SYMWIDTH, TOTWIDTH, HCFIRSTSYM;
+  int32_t DW;
+  CJBig2_Image* BS, *BHC;
+  FX_DWORD I, J, REFAGGNINST;
+  FX_BOOL* EXFLAGS;
+  FX_DWORD EXINDEX;
+  FX_BOOL CUREXFLAG;
+  FX_DWORD EXRUNLENGTH;
+  int32_t nVal, nBits;
+  FX_DWORD nTmp;
+  FX_DWORD SBNUMSYMS;
+  uint8_t SBSYMCODELEN;
+  JBig2HuffmanCode* SBSYMCODES;
+  FX_DWORD IDI;
+  int32_t RDXI, RDYI;
+  FX_DWORD BMSIZE;
+  FX_DWORD stride;
+  CJBig2_Image** SBSYMS;
+  nonstd::unique_ptr<CJBig2_HuffmanDecoder> pHuffmanDecoder(
+      new CJBig2_HuffmanDecoder(pStream));
+  SDNEWSYMS = FX_Alloc(CJBig2_Image*, SDNUMNEWSYMS);
+  FXSYS_memset(SDNEWSYMS, 0, SDNUMNEWSYMS * sizeof(CJBig2_Image*));
+  SDNEWSYMWIDTHS = nullptr;
+  BHC = nullptr;
+  if (SDREFAGG == 0) {
+    SDNEWSYMWIDTHS = FX_Alloc(FX_DWORD, SDNUMNEWSYMS);
+    FXSYS_memset(SDNEWSYMWIDTHS, 0, SDNUMNEWSYMS * sizeof(FX_DWORD));
+  }
+  nonstd::unique_ptr<CJBig2_SymbolDict> pDict(new CJBig2_SymbolDict());
+  nonstd::unique_ptr<CJBig2_HuffmanTable> pTable;
+
+  HCHEIGHT = 0;
+  NSYMSDECODED = 0;
+  BS = nullptr;
+  while (NSYMSDECODED < SDNUMNEWSYMS) {
+    if (pHuffmanDecoder->decodeAValue(SDHUFFDH, &HCDH) != 0) {
+      goto failed;
+    }
+    HCHEIGHT = HCHEIGHT + HCDH;
+    if ((int)HCHEIGHT < 0 || (int)HCHEIGHT > JBIG2_MAX_IMAGE_SIZE) {
+      goto failed;
+    }
+    SYMWIDTH = 0;
+    TOTWIDTH = 0;
+    HCFIRSTSYM = NSYMSDECODED;
+    for (;;) {
+      nVal = pHuffmanDecoder->decodeAValue(SDHUFFDW, &DW);
+      if (nVal == JBIG2_OOB) {
+        break;
+      } else if (nVal != 0) {
+        goto failed;
+      } else {
+        if (NSYMSDECODED >= SDNUMNEWSYMS) {
+          goto failed;
+        }
+        SYMWIDTH = SYMWIDTH + DW;
+        if ((int)SYMWIDTH < 0 || (int)SYMWIDTH > JBIG2_MAX_IMAGE_SIZE) {
+          goto failed;
+        } else if (HCHEIGHT == 0 || SYMWIDTH == 0) {
+          TOTWIDTH = TOTWIDTH + SYMWIDTH;
+          SDNEWSYMS[NSYMSDECODED] = nullptr;
+          NSYMSDECODED = NSYMSDECODED + 1;
+          continue;
+        }
+        TOTWIDTH = TOTWIDTH + SYMWIDTH;
+      }
+      if (SDREFAGG == 1) {
+        if (pHuffmanDecoder->decodeAValue(SDHUFFAGGINST, (int*)&REFAGGNINST) !=
+            0) {
+          goto failed;
+        }
+        BS = nullptr;
+        if (REFAGGNINST > 1) {
+          nonstd::unique_ptr<CJBig2_TRDProc> pDecoder(new CJBig2_TRDProc());
+          pDecoder->SBHUFF = SDHUFF;
+          pDecoder->SBREFINE = 1;
+          pDecoder->SBW = SYMWIDTH;
+          pDecoder->SBH = HCHEIGHT;
+          pDecoder->SBNUMINSTANCES = REFAGGNINST;
+          pDecoder->SBSTRIPS = 1;
+          pDecoder->SBNUMSYMS = SDNUMINSYMS + NSYMSDECODED;
+          SBNUMSYMS = pDecoder->SBNUMSYMS;
+          SBSYMCODES = FX_Alloc(JBig2HuffmanCode, SBNUMSYMS);
+          nTmp = 1;
+          while ((FX_DWORD)(1 << nTmp) < SBNUMSYMS) {
+            nTmp++;
+          }
+          for (I = 0; I < SBNUMSYMS; I++) {
+            SBSYMCODES[I].codelen = nTmp;
+            SBSYMCODES[I].code = I;
+          }
+          pDecoder->SBSYMCODES = SBSYMCODES;
+          SBSYMS = FX_Alloc(CJBig2_Image*, SBNUMSYMS);
+          JBIG2_memcpy(SBSYMS, SDINSYMS, SDNUMINSYMS * sizeof(CJBig2_Image*));
+          JBIG2_memcpy(SBSYMS + SDNUMINSYMS, SDNEWSYMS,
+                       NSYMSDECODED * sizeof(CJBig2_Image*));
+          pDecoder->SBSYMS = SBSYMS;
+          pDecoder->SBDEFPIXEL = 0;
+          pDecoder->SBCOMBOP = JBIG2_COMPOSE_OR;
+          pDecoder->TRANSPOSED = 0;
+          pDecoder->REFCORNER = JBIG2_CORNER_TOPLEFT;
+          pDecoder->SBDSOFFSET = 0;
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFFS(
+              new CJBig2_HuffmanTable(HuffmanTable_B6,
+                                      FX_ArraySize(HuffmanTable_B6),
+                                      HuffmanTable_HTOOB_B6));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFDS(
+              new CJBig2_HuffmanTable(HuffmanTable_B8,
+                                      FX_ArraySize(HuffmanTable_B8),
+                                      HuffmanTable_HTOOB_B8));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFDT(
+              new CJBig2_HuffmanTable(HuffmanTable_B11,
+                                      FX_ArraySize(HuffmanTable_B11),
+                                      HuffmanTable_HTOOB_B11));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDW(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDH(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDX(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDY(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRSIZE(
+              new CJBig2_HuffmanTable(HuffmanTable_B1,
+                                      FX_ArraySize(HuffmanTable_B1),
+                                      HuffmanTable_HTOOB_B1));
+          pDecoder->SBHUFFFS = SBHUFFFS.get();
+          pDecoder->SBHUFFDS = SBHUFFDS.get();
+          pDecoder->SBHUFFDT = SBHUFFDT.get();
+          pDecoder->SBHUFFRDW = SBHUFFRDW.get();
+          pDecoder->SBHUFFRDH = SBHUFFRDH.get();
+          pDecoder->SBHUFFRDX = SBHUFFRDX.get();
+          pDecoder->SBHUFFRDY = SBHUFFRDY.get();
+          pDecoder->SBHUFFRSIZE = SBHUFFRSIZE.get();
+          pDecoder->SBRTEMPLATE = SDRTEMPLATE;
+          pDecoder->SBRAT[0] = SDRAT[0];
+          pDecoder->SBRAT[1] = SDRAT[1];
+          pDecoder->SBRAT[2] = SDRAT[2];
+          pDecoder->SBRAT[3] = SDRAT[3];
+          BS = pDecoder->decode_Huffman(pStream, grContext);
+          if (!BS) {
+            FX_Free(SBSYMCODES);
+            FX_Free(SBSYMS);
+            goto failed;
+          }
+          FX_Free(SBSYMCODES);
+          FX_Free(SBSYMS);
+        } else if (REFAGGNINST == 1) {
+          SBNUMSYMS = SDNUMINSYMS + SDNUMNEWSYMS;
+          nTmp = 1;
+          while ((FX_DWORD)(1 << nTmp) < SBNUMSYMS) {
+            nTmp++;
+          }
+          SBSYMCODELEN = (uint8_t)nTmp;
+          SBSYMCODES = FX_Alloc(JBig2HuffmanCode, SBNUMSYMS);
+          for (I = 0; I < SBNUMSYMS; I++) {
+            SBSYMCODES[I].codelen = SBSYMCODELEN;
+            SBSYMCODES[I].code = I;
+          }
+          nVal = 0;
+          nBits = 0;
+          for (;;) {
+            if (pStream->read1Bit(&nTmp) != 0) {
+              FX_Free(SBSYMCODES);
+              goto failed;
+            }
+            nVal = (nVal << 1) | nTmp;
+            for (IDI = 0; IDI < SBNUMSYMS; IDI++) {
+              if ((nVal == SBSYMCODES[IDI].code) &&
+                  (nBits == SBSYMCODES[IDI].codelen)) {
+                break;
+              }
+            }
+            if (IDI < SBNUMSYMS) {
+              break;
+            }
+          }
+          FX_Free(SBSYMCODES);
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRDX(
+              new CJBig2_HuffmanTable(HuffmanTable_B15,
+                                      FX_ArraySize(HuffmanTable_B15),
+                                      HuffmanTable_HTOOB_B15));
+          nonstd::unique_ptr<CJBig2_HuffmanTable> SBHUFFRSIZE(
+              new CJBig2_HuffmanTable(HuffmanTable_B1,
+                                      FX_ArraySize(HuffmanTable_B1),
+                                      HuffmanTable_HTOOB_B1));
+          if ((pHuffmanDecoder->decodeAValue(SBHUFFRDX.get(), &RDXI) != 0) ||
+              (pHuffmanDecoder->decodeAValue(SBHUFFRDX.get(), &RDYI) != 0) ||
+              (pHuffmanDecoder->decodeAValue(SBHUFFRSIZE.get(), &nVal) != 0)) {
+            goto failed;
+          }
+          pStream->alignByte();
+          nTmp = pStream->getOffset();
+          SBSYMS = FX_Alloc(CJBig2_Image*, SBNUMSYMS);
+          JBIG2_memcpy(SBSYMS, SDINSYMS, SDNUMINSYMS * sizeof(CJBig2_Image*));
+          JBIG2_memcpy(SBSYMS + SDNUMINSYMS, SDNEWSYMS,
+                       NSYMSDECODED * sizeof(CJBig2_Image*));
+          nonstd::unique_ptr<CJBig2_GRRDProc> pGRRD(new CJBig2_GRRDProc());
+          pGRRD->GRW = SYMWIDTH;
+          pGRRD->GRH = HCHEIGHT;
+          pGRRD->GRTEMPLATE = SDRTEMPLATE;
+          pGRRD->GRREFERENCE = SBSYMS[IDI];
+          pGRRD->GRREFERENCEDX = RDXI;
+          pGRRD->GRREFERENCEDY = RDYI;
+          pGRRD->TPGRON = 0;
+          pGRRD->GRAT[0] = SDRAT[0];
+          pGRRD->GRAT[1] = SDRAT[1];
+          pGRRD->GRAT[2] = SDRAT[2];
+          pGRRD->GRAT[3] = SDRAT[3];
+          nonstd::unique_ptr<CJBig2_ArithDecoder> pArithDecoder(
+              new CJBig2_ArithDecoder(pStream));
+          BS = pGRRD->decode(pArithDecoder.get(), grContext);
+          if (!BS) {
+            FX_Free(SBSYMS);
+            goto failed;
+          }
+          pStream->alignByte();
+          pStream->offset(2);
+          if ((FX_DWORD)nVal != (pStream->getOffset() - nTmp)) {
+            delete BS;
+            FX_Free(SBSYMS);
+            goto failed;
+          }
+          FX_Free(SBSYMS);
+        }
+        SDNEWSYMS[NSYMSDECODED] = BS;
+      }
+      if (SDREFAGG == 0) {
+        SDNEWSYMWIDTHS[NSYMSDECODED] = SYMWIDTH;
+      }
+      NSYMSDECODED = NSYMSDECODED + 1;
+    }
+    if (SDREFAGG == 0) {
+      if (pHuffmanDecoder->decodeAValue(SDHUFFBMSIZE, (int32_t*)&BMSIZE) != 0) {
+        goto failed;
+      }
+      pStream->alignByte();
+      if (BMSIZE == 0) {
+        stride = (TOTWIDTH + 7) >> 3;
+        if (pStream->getByteLeft() >= stride * HCHEIGHT) {
+          BHC = new CJBig2_Image(TOTWIDTH, HCHEIGHT);
+          for (I = 0; I < HCHEIGHT; I++) {
+            JBIG2_memcpy(BHC->m_pData + I * BHC->m_nStride,
+                         pStream->getPointer(), stride);
+            pStream->offset(stride);
+          }
+        } else {
+          goto failed;
+        }
+      } else {
+        nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
+        pGRD->MMR = 1;
+        pGRD->GBW = TOTWIDTH;
+        pGRD->GBH = HCHEIGHT;
+        FXCODEC_STATUS status = pGRD->Start_decode_MMR(&BHC, pStream, nullptr);
+        while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+          pGRD->Continue_decode(pPause);
+        }
+        pStream->alignByte();
+      }
+      nTmp = 0;
+      if (!BHC) {
+        continue;
+      }
+      for (I = HCFIRSTSYM; I < NSYMSDECODED; I++) {
+        SDNEWSYMS[I] = BHC->subImage(nTmp, 0, SDNEWSYMWIDTHS[I], HCHEIGHT);
+        nTmp += SDNEWSYMWIDTHS[I];
+      }
+      delete BHC;
+      BHC = nullptr;
+    }
+  }
+  EXINDEX = 0;
+  CUREXFLAG = 0;
+  pTable.reset(new CJBig2_HuffmanTable(
+      HuffmanTable_B1, FX_ArraySize(HuffmanTable_B1), HuffmanTable_HTOOB_B1));
+  EXFLAGS = FX_Alloc(FX_BOOL, SDNUMINSYMS + SDNUMNEWSYMS);
+  while (EXINDEX < SDNUMINSYMS + SDNUMNEWSYMS) {
+    if (pHuffmanDecoder->decodeAValue(pTable.get(), (int*)&EXRUNLENGTH) != 0) {
+      FX_Free(EXFLAGS);
+      goto failed;
+    }
+    if (EXINDEX + EXRUNLENGTH > SDNUMINSYMS + SDNUMNEWSYMS) {
+      FX_Free(EXFLAGS);
+      goto failed;
+    }
+    if (EXRUNLENGTH != 0) {
+      for (I = EXINDEX; I < EXINDEX + EXRUNLENGTH; I++) {
+        EXFLAGS[I] = CUREXFLAG;
+      }
+    }
+    EXINDEX = EXINDEX + EXRUNLENGTH;
+    CUREXFLAG = !CUREXFLAG;
+  }
+  pDict->SDNUMEXSYMS = SDNUMEXSYMS;
+  pDict->SDEXSYMS = FX_Alloc(CJBig2_Image*, SDNUMEXSYMS);
+  I = J = 0;
+  for (I = 0; I < SDNUMINSYMS + SDNUMNEWSYMS; I++) {
+    if (EXFLAGS[I] && J < SDNUMEXSYMS) {
+      if (I < SDNUMINSYMS) {
+        pDict->SDEXSYMS[J] = new CJBig2_Image(*SDINSYMS[I]);
+      } else {
+        pDict->SDEXSYMS[J] = SDNEWSYMS[I - SDNUMINSYMS];
+      }
+      J = J + 1;
+    } else if (!EXFLAGS[I] && I >= SDNUMINSYMS) {
+      delete SDNEWSYMS[I - SDNUMINSYMS];
+    }
+  }
+  if (J < SDNUMEXSYMS) {
+    pDict->SDNUMEXSYMS = J;
+  }
+  FX_Free(EXFLAGS);
+  FX_Free(SDNEWSYMS);
+  if (SDREFAGG == 0) {
+    FX_Free(SDNEWSYMWIDTHS);
+  }
+  return pDict.release();
+failed:
+  for (I = 0; I < NSYMSDECODED; I++) {
+    delete SDNEWSYMS[I];
+  }
+  FX_Free(SDNEWSYMS);
+  if (SDREFAGG == 0) {
+    FX_Free(SDNEWSYMWIDTHS);
+  }
+  return nullptr;
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_SddProc.h b/core/src/fxcodec/jbig2/JBig2_SddProc.h
new file mode 100644
index 0000000000..7bc910fea1
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_SddProc.h
@@ -0,0 +1,48 @@
+// Copyright 2015 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_SRC_FXCODEC_JBIG2_JBIG2_SDDPROC_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_SDDPROC_H_
+
+#include "../../../core/include/fxcrt/fx_system.h"
+
+class CJBig2_ArithDecoder;
+class CJBig2_BitStream;
+class CJBig2_HuffmanTable;
+class CJBig2_Image;
+class CJBig2_SymbolDict;
+class IFX_Pause;
+struct JBig2ArithCtx;
+
+class CJBig2_SDDProc {
+ public:
+  CJBig2_SymbolDict* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                                  JBig2ArithCtx* gbContext,
+                                  JBig2ArithCtx* grContext);
+
+  CJBig2_SymbolDict* decode_Huffman(CJBig2_BitStream* pStream,
+                                    JBig2ArithCtx* gbContext,
+                                    JBig2ArithCtx* grContext,
+                                    IFX_Pause* pPause);
+
+ public:
+  FX_BOOL SDHUFF;
+  FX_BOOL SDREFAGG;
+  FX_DWORD SDNUMINSYMS;
+  CJBig2_Image** SDINSYMS;
+  FX_DWORD SDNUMNEWSYMS;
+  FX_DWORD SDNUMEXSYMS;
+  CJBig2_HuffmanTable* SDHUFFDH;
+  CJBig2_HuffmanTable* SDHUFFDW;
+  CJBig2_HuffmanTable* SDHUFFBMSIZE;
+  CJBig2_HuffmanTable* SDHUFFAGGINST;
+  uint8_t SDTEMPLATE;
+  int8_t SDAT[8];
+  FX_BOOL SDRTEMPLATE;
+  int8_t SDRAT[4];
+};
+
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_SDDPROC_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_TrdProc.cpp b/core/src/fxcodec/jbig2/JBig2_TrdProc.cpp
new file mode 100644
index 0000000000..afa3dba920
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_TrdProc.cpp
@@ -0,0 +1,438 @@
+// Copyright 2015 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 "JBig2_TrdProc.h"
+
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "JBig2_ArithDecoder.h"
+#include "JBig2_ArithIntDecoder.h"
+#include "JBig2_HuffmanDecoder.h"
+#include "JBig2_GrrdProc.h"
+
+CJBig2_Image* CJBig2_TRDProc::decode_Huffman(CJBig2_BitStream* pStream,
+                                             JBig2ArithCtx* grContext) {
+  int32_t STRIPT, FIRSTS;
+  FX_DWORD NINSTANCES;
+  int32_t DT, DFS, CURS;
+  uint8_t CURT;
+  int32_t SI, TI;
+  FX_DWORD IDI;
+  CJBig2_Image* IBI;
+  FX_DWORD WI, HI;
+  int32_t IDS;
+  FX_BOOL RI;
+  int32_t RDWI, RDHI, RDXI, RDYI;
+  CJBig2_Image* IBOI;
+  FX_DWORD WOI, HOI;
+  FX_BOOL bFirst;
+  FX_DWORD nTmp;
+  int32_t nVal, nBits;
+  nonstd::unique_ptr<CJBig2_HuffmanDecoder> pHuffmanDecoder(
+      new CJBig2_HuffmanDecoder(pStream));
+  nonstd::unique_ptr<CJBig2_Image> SBREG(new CJBig2_Image(SBW, SBH));
+  SBREG->fill(SBDEFPIXEL);
+  if (pHuffmanDecoder->decodeAValue(SBHUFFDT, &STRIPT) != 0)
+    return nullptr;
+
+  STRIPT *= SBSTRIPS;
+  STRIPT = -STRIPT;
+  FIRSTS = 0;
+  NINSTANCES = 0;
+  while (NINSTANCES < SBNUMINSTANCES) {
+    if (pHuffmanDecoder->decodeAValue(SBHUFFDT, &DT) != 0)
+      return nullptr;
+
+    DT *= SBSTRIPS;
+    STRIPT = STRIPT + DT;
+    bFirst = TRUE;
+    for (;;) {
+      if (bFirst) {
+        if (pHuffmanDecoder->decodeAValue(SBHUFFFS, &DFS) != 0)
+          return nullptr;
+
+        FIRSTS = FIRSTS + DFS;
+        CURS = FIRSTS;
+        bFirst = FALSE;
+      } else {
+        nVal = pHuffmanDecoder->decodeAValue(SBHUFFDS, &IDS);
+        if (nVal == JBIG2_OOB) {
+          break;
+        } else if (nVal != 0) {
+          return nullptr;
+        } else {
+          CURS = CURS + IDS + SBDSOFFSET;
+        }
+      }
+      if (SBSTRIPS == 1) {
+        CURT = 0;
+      } else {
+        nTmp = 1;
+        while ((FX_DWORD)(1 << nTmp) < SBSTRIPS) {
+          nTmp++;
+        }
+        if (pStream->readNBits(nTmp, &nVal) != 0)
+          return nullptr;
+
+        CURT = nVal;
+      }
+      TI = STRIPT + CURT;
+      nVal = 0;
+      nBits = 0;
+      for (;;) {
+        if (pStream->read1Bit(&nTmp) != 0)
+          return nullptr;
+
+        nVal = (nVal << 1) | nTmp;
+        nBits++;
+        for (IDI = 0; IDI < SBNUMSYMS; IDI++) {
+          if ((nBits == SBSYMCODES[IDI].codelen) &&
+              (nVal == SBSYMCODES[IDI].code)) {
+            break;
+          }
+        }
+        if (IDI < SBNUMSYMS) {
+          break;
+        }
+      }
+      if (SBREFINE == 0) {
+        RI = 0;
+      } else {
+        if (pStream->read1Bit(&RI) != 0) {
+          return nullptr;
+        }
+      }
+      if (RI == 0) {
+        IBI = SBSYMS[IDI];
+      } else {
+        if ((pHuffmanDecoder->decodeAValue(SBHUFFRDW, &RDWI) != 0) ||
+            (pHuffmanDecoder->decodeAValue(SBHUFFRDH, &RDHI) != 0) ||
+            (pHuffmanDecoder->decodeAValue(SBHUFFRDX, &RDXI) != 0) ||
+            (pHuffmanDecoder->decodeAValue(SBHUFFRDY, &RDYI) != 0) ||
+            (pHuffmanDecoder->decodeAValue(SBHUFFRSIZE, &nVal) != 0)) {
+          return nullptr;
+        }
+        pStream->alignByte();
+        nTmp = pStream->getOffset();
+        IBOI = SBSYMS[IDI];
+        if (!IBOI)
+          return nullptr;
+
+        WOI = IBOI->m_nWidth;
+        HOI = IBOI->m_nHeight;
+        if ((int)(WOI + RDWI) < 0 || (int)(HOI + RDHI) < 0)
+          return nullptr;
+
+        nonstd::unique_ptr<CJBig2_GRRDProc> pGRRD(new CJBig2_GRRDProc());
+        pGRRD->GRW = WOI + RDWI;
+        pGRRD->GRH = HOI + RDHI;
+        pGRRD->GRTEMPLATE = SBRTEMPLATE;
+        pGRRD->GRREFERENCE = IBOI;
+        pGRRD->GRREFERENCEDX = (RDWI >> 2) + RDXI;
+        pGRRD->GRREFERENCEDY = (RDHI >> 2) + RDYI;
+        pGRRD->TPGRON = 0;
+        pGRRD->GRAT[0] = SBRAT[0];
+        pGRRD->GRAT[1] = SBRAT[1];
+        pGRRD->GRAT[2] = SBRAT[2];
+        pGRRD->GRAT[3] = SBRAT[3];
+
+        {
+          nonstd::unique_ptr<CJBig2_ArithDecoder> pArithDecoder(
+              new CJBig2_ArithDecoder(pStream));
+          IBI = pGRRD->decode(pArithDecoder.get(), grContext);
+          if (!IBI)
+            return nullptr;
+        }
+
+        pStream->alignByte();
+        pStream->offset(2);
+        if ((FX_DWORD)nVal != (pStream->getOffset() - nTmp)) {
+          delete IBI;
+          return nullptr;
+        }
+      }
+      if (!IBI) {
+        continue;
+      }
+      WI = IBI->m_nWidth;
+      HI = IBI->m_nHeight;
+      if (TRANSPOSED == 0 && ((REFCORNER == JBIG2_CORNER_TOPRIGHT) ||
+                              (REFCORNER == JBIG2_CORNER_BOTTOMRIGHT))) {
+        CURS = CURS + WI - 1;
+      } else if (TRANSPOSED == 1 && ((REFCORNER == JBIG2_CORNER_BOTTOMLEFT) ||
+                                     (REFCORNER == JBIG2_CORNER_BOTTOMRIGHT))) {
+        CURS = CURS + HI - 1;
+      }
+      SI = CURS;
+      if (TRANSPOSED == 0) {
+        switch (REFCORNER) {
+          case JBIG2_CORNER_TOPLEFT:
+            SBREG->composeFrom(SI, TI, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_TOPRIGHT:
+            SBREG->composeFrom(SI - WI + 1, TI, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_BOTTOMLEFT:
+            SBREG->composeFrom(SI, TI - HI + 1, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_BOTTOMRIGHT:
+            SBREG->composeFrom(SI - WI + 1, TI - HI + 1, IBI, SBCOMBOP);
+            break;
+        }
+      } else {
+        switch (REFCORNER) {
+          case JBIG2_CORNER_TOPLEFT:
+            SBREG->composeFrom(TI, SI, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_TOPRIGHT:
+            SBREG->composeFrom(TI - WI + 1, SI, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_BOTTOMLEFT:
+            SBREG->composeFrom(TI, SI - HI + 1, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_BOTTOMRIGHT:
+            SBREG->composeFrom(TI - WI + 1, SI - HI + 1, IBI, SBCOMBOP);
+            break;
+        }
+      }
+      if (RI != 0) {
+        delete IBI;
+      }
+      if (TRANSPOSED == 0 && ((REFCORNER == JBIG2_CORNER_TOPLEFT) ||
+                              (REFCORNER == JBIG2_CORNER_BOTTOMLEFT))) {
+        CURS = CURS + WI - 1;
+      } else if (TRANSPOSED == 1 && ((REFCORNER == JBIG2_CORNER_TOPLEFT) ||
+                                     (REFCORNER == JBIG2_CORNER_TOPRIGHT))) {
+        CURS = CURS + HI - 1;
+      }
+      NINSTANCES = NINSTANCES + 1;
+    }
+  }
+  return SBREG.release();
+}
+
+CJBig2_Image* CJBig2_TRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                                           JBig2ArithCtx* grContext,
+                                           JBig2IntDecoderState* pIDS) {
+  int32_t STRIPT, FIRSTS;
+  FX_DWORD NINSTANCES;
+  int32_t DT, DFS, CURS;
+  int32_t CURT;
+  int32_t SI, TI;
+  FX_DWORD IDI;
+  CJBig2_Image* IBI;
+  FX_DWORD WI, HI;
+  int32_t IDS;
+  int RI;
+  int32_t RDWI, RDHI, RDXI, RDYI;
+  CJBig2_Image* IBOI;
+  FX_DWORD WOI, HOI;
+  FX_BOOL bFirst;
+  int32_t nRet, nVal;
+  int32_t bRetained;
+  CJBig2_ArithIntDecoder* IADT, *IAFS, *IADS, *IAIT, *IARI, *IARDW, *IARDH,
+      *IARDX, *IARDY;
+  CJBig2_ArithIaidDecoder* IAID;
+  if (pIDS) {
+    IADT = pIDS->IADT;
+    IAFS = pIDS->IAFS;
+    IADS = pIDS->IADS;
+    IAIT = pIDS->IAIT;
+    IARI = pIDS->IARI;
+    IARDW = pIDS->IARDW;
+    IARDH = pIDS->IARDH;
+    IARDX = pIDS->IARDX;
+    IARDY = pIDS->IARDY;
+    IAID = pIDS->IAID;
+    bRetained = TRUE;
+  } else {
+    IADT = new CJBig2_ArithIntDecoder();
+    IAFS = new CJBig2_ArithIntDecoder();
+    IADS = new CJBig2_ArithIntDecoder();
+    IAIT = new CJBig2_ArithIntDecoder();
+    IARI = new CJBig2_ArithIntDecoder();
+    IARDW = new CJBig2_ArithIntDecoder();
+    IARDH = new CJBig2_ArithIntDecoder();
+    IARDX = new CJBig2_ArithIntDecoder();
+    IARDY = new CJBig2_ArithIntDecoder();
+    IAID = new CJBig2_ArithIaidDecoder(SBSYMCODELEN);
+    bRetained = FALSE;
+  }
+  nonstd::unique_ptr<CJBig2_Image> SBREG(new CJBig2_Image(SBW, SBH));
+  SBREG->fill(SBDEFPIXEL);
+  if (IADT->decode(pArithDecoder, &STRIPT) == -1) {
+    goto failed;
+  }
+  STRIPT *= SBSTRIPS;
+  STRIPT = -STRIPT;
+  FIRSTS = 0;
+  NINSTANCES = 0;
+  while (NINSTANCES < SBNUMINSTANCES) {
+    if (IADT->decode(pArithDecoder, &DT) == -1) {
+      goto failed;
+    }
+    DT *= SBSTRIPS;
+    STRIPT = STRIPT + DT;
+    bFirst = TRUE;
+    for (;;) {
+      if (bFirst) {
+        if (IAFS->decode(pArithDecoder, &DFS) == -1) {
+          goto failed;
+        }
+        FIRSTS = FIRSTS + DFS;
+        CURS = FIRSTS;
+        bFirst = FALSE;
+      } else {
+        nRet = IADS->decode(pArithDecoder, &IDS);
+        if (nRet == JBIG2_OOB) {
+          break;
+        } else if (nRet != 0) {
+          goto failed;
+        } else {
+          CURS = CURS + IDS + SBDSOFFSET;
+        }
+      }
+      if (NINSTANCES >= SBNUMINSTANCES) {
+        break;
+      }
+      if (SBSTRIPS == 1) {
+        CURT = 0;
+      } else {
+        if (IAIT->decode(pArithDecoder, &nVal) == -1) {
+          goto failed;
+        }
+        CURT = nVal;
+      }
+      TI = STRIPT + CURT;
+      if (IAID->decode(pArithDecoder, &nVal) == -1) {
+        goto failed;
+      }
+      IDI = nVal;
+      if (IDI >= SBNUMSYMS) {
+        goto failed;
+      }
+      if (SBREFINE == 0) {
+        RI = 0;
+      } else {
+        if (IARI->decode(pArithDecoder, &RI) == -1) {
+          goto failed;
+        }
+      }
+      if (!SBSYMS[IDI]) {
+        goto failed;
+      }
+      if (RI == 0) {
+        IBI = SBSYMS[IDI];
+      } else {
+        if ((IARDW->decode(pArithDecoder, &RDWI) == -1) ||
+            (IARDH->decode(pArithDecoder, &RDHI) == -1) ||
+            (IARDX->decode(pArithDecoder, &RDXI) == -1) ||
+            (IARDY->decode(pArithDecoder, &RDYI) == -1)) {
+          goto failed;
+        }
+        IBOI = SBSYMS[IDI];
+        WOI = IBOI->m_nWidth;
+        HOI = IBOI->m_nHeight;
+        if ((int)(WOI + RDWI) < 0 || (int)(HOI + RDHI) < 0) {
+          goto failed;
+        }
+        nonstd::unique_ptr<CJBig2_GRRDProc> pGRRD(new CJBig2_GRRDProc());
+        pGRRD->GRW = WOI + RDWI;
+        pGRRD->GRH = HOI + RDHI;
+        pGRRD->GRTEMPLATE = SBRTEMPLATE;
+        pGRRD->GRREFERENCE = IBOI;
+        pGRRD->GRREFERENCEDX = (RDWI >> 1) + RDXI;
+        pGRRD->GRREFERENCEDY = (RDHI >> 1) + RDYI;
+        pGRRD->TPGRON = 0;
+        pGRRD->GRAT[0] = SBRAT[0];
+        pGRRD->GRAT[1] = SBRAT[1];
+        pGRRD->GRAT[2] = SBRAT[2];
+        pGRRD->GRAT[3] = SBRAT[3];
+        IBI = pGRRD->decode(pArithDecoder, grContext);
+        if (!IBI)
+          goto failed;
+      }
+      WI = IBI->m_nWidth;
+      HI = IBI->m_nHeight;
+      if (TRANSPOSED == 0 && ((REFCORNER == JBIG2_CORNER_TOPRIGHT) ||
+                              (REFCORNER == JBIG2_CORNER_BOTTOMRIGHT))) {
+        CURS = CURS + WI - 1;
+      } else if (TRANSPOSED == 1 && ((REFCORNER == JBIG2_CORNER_BOTTOMLEFT) ||
+                                     (REFCORNER == JBIG2_CORNER_BOTTOMRIGHT))) {
+        CURS = CURS + HI - 1;
+      }
+      SI = CURS;
+      if (TRANSPOSED == 0) {
+        switch (REFCORNER) {
+          case JBIG2_CORNER_TOPLEFT:
+            SBREG->composeFrom(SI, TI, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_TOPRIGHT:
+            SBREG->composeFrom(SI - WI + 1, TI, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_BOTTOMLEFT:
+            SBREG->composeFrom(SI, TI - HI + 1, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_BOTTOMRIGHT:
+            SBREG->composeFrom(SI - WI + 1, TI - HI + 1, IBI, SBCOMBOP);
+            break;
+        }
+      } else {
+        switch (REFCORNER) {
+          case JBIG2_CORNER_TOPLEFT:
+            SBREG->composeFrom(TI, SI, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_TOPRIGHT:
+            SBREG->composeFrom(TI - WI + 1, SI, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_BOTTOMLEFT:
+            SBREG->composeFrom(TI, SI - HI + 1, IBI, SBCOMBOP);
+            break;
+          case JBIG2_CORNER_BOTTOMRIGHT:
+            SBREG->composeFrom(TI - WI + 1, SI - HI + 1, IBI, SBCOMBOP);
+            break;
+        }
+      }
+      if (RI != 0) {
+        delete IBI;
+      }
+      if (TRANSPOSED == 0 && ((REFCORNER == JBIG2_CORNER_TOPLEFT) ||
+                              (REFCORNER == JBIG2_CORNER_BOTTOMLEFT))) {
+        CURS = CURS + WI - 1;
+      } else if (TRANSPOSED == 1 && ((REFCORNER == JBIG2_CORNER_TOPLEFT) ||
+                                     (REFCORNER == JBIG2_CORNER_TOPRIGHT))) {
+        CURS = CURS + HI - 1;
+      }
+      NINSTANCES = NINSTANCES + 1;
+    }
+  }
+  if (bRetained == FALSE) {
+    delete IADT;
+    delete IAFS;
+    delete IADS;
+    delete IAIT;
+    delete IARI;
+    delete IARDW;
+    delete IARDH;
+    delete IARDX;
+    delete IARDY;
+    delete IAID;
+  }
+  return SBREG.release();
+failed:
+  if (bRetained == FALSE) {
+    delete IADT;
+    delete IAFS;
+    delete IADS;
+    delete IAIT;
+    delete IARI;
+    delete IARDW;
+    delete IARDH;
+    delete IARDX;
+    delete IARDY;
+    delete IAID;
+  }
+  return nullptr;
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_TrdProc.h b/core/src/fxcodec/jbig2/JBig2_TrdProc.h
new file mode 100644
index 0000000000..1ab7d6a11a
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_TrdProc.h
@@ -0,0 +1,83 @@
+// Copyright 2015 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_SRC_FXCODEC_JBIG2_JBIG2_TRDPROC_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_TRDPROC_H_
+
+#include "../../../core/include/fxcrt/fx_system.h"
+
+#include "JBig2_Image.h"
+
+class CJBig2_ArithDecoder;
+class CJBig2_ArithIaidDecoder;
+class CJBig2_ArithIntDecoder;
+class CJBig2_BitStream;
+class CJBig2_HuffmanTable;
+struct JBig2ArithCtx;
+struct JBig2HuffmanCode;
+
+struct JBig2IntDecoderState {
+  CJBig2_ArithIntDecoder* IADT;
+  CJBig2_ArithIntDecoder* IAFS;
+  CJBig2_ArithIntDecoder* IADS;
+  CJBig2_ArithIntDecoder* IAIT;
+  CJBig2_ArithIntDecoder* IARI;
+  CJBig2_ArithIntDecoder* IARDW;
+  CJBig2_ArithIntDecoder* IARDH;
+  CJBig2_ArithIntDecoder* IARDX;
+  CJBig2_ArithIntDecoder* IARDY;
+  CJBig2_ArithIaidDecoder* IAID;
+};
+
+enum JBig2Corner {
+  JBIG2_CORNER_BOTTOMLEFT = 0,
+  JBIG2_CORNER_TOPLEFT = 1,
+  JBIG2_CORNER_BOTTOMRIGHT = 2,
+  JBIG2_CORNER_TOPRIGHT = 3
+};
+
+class CJBig2_TRDProc {
+ public:
+  CJBig2_Image* decode_Huffman(CJBig2_BitStream* pStream,
+                               JBig2ArithCtx* grContext);
+
+  CJBig2_Image* decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
+                             JBig2ArithCtx* grContext,
+                             JBig2IntDecoderState* pIDS = NULL);
+
+ public:
+  FX_BOOL SBHUFF;
+  FX_BOOL SBREFINE;
+  FX_DWORD SBW;
+  FX_DWORD SBH;
+  FX_DWORD SBNUMINSTANCES;
+  FX_DWORD SBSTRIPS;
+  FX_DWORD SBNUMSYMS;
+
+  JBig2HuffmanCode* SBSYMCODES;
+  uint8_t SBSYMCODELEN;
+
+  CJBig2_Image** SBSYMS;
+  FX_BOOL SBDEFPIXEL;
+
+  JBig2ComposeOp SBCOMBOP;
+  FX_BOOL TRANSPOSED;
+
+  JBig2Corner REFCORNER;
+  int8_t SBDSOFFSET;
+  CJBig2_HuffmanTable* SBHUFFFS;
+  CJBig2_HuffmanTable* SBHUFFDS;
+  CJBig2_HuffmanTable* SBHUFFDT;
+  CJBig2_HuffmanTable* SBHUFFRDW;
+  CJBig2_HuffmanTable* SBHUFFRDH;
+  CJBig2_HuffmanTable* SBHUFFRDX;
+  CJBig2_HuffmanTable* SBHUFFRDY;
+  CJBig2_HuffmanTable* SBHUFFRSIZE;
+  FX_BOOL SBRTEMPLATE;
+  int8_t SBRAT[4];
+};
+
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_TRDPROC_H_