Remove dead JBig2 code.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1328643002 .

11 files changed, 5 insertions, 1266 deletions

diff --git a/core/src/fxcodec/codec/codec_int.h b/core/src/fxcodec/codec/codec_int.h
index ebd34cac26..7dafd27c15 100644
--- a/core/src/fxcodec/codec/codec_int.h
+++ b/core/src/fxcodec/codec/codec_int.h
@@ -315,19 +315,6 @@ class CCodec_Jbig2Module : public ICodec_Jbig2Module {
   ~CCodec_Jbig2Module() override;
 
   // ICodec_Jbig2Module
-  FX_BOOL Decode(FX_DWORD width,
-                 FX_DWORD height,
-                 const uint8_t* src_buf,
-                 FX_DWORD src_size,
-                 const uint8_t* global_data,
-                 FX_DWORD global_size,
-                 uint8_t* dest_buf,
-                 FX_DWORD dest_pitch) override;
-  FX_BOOL Decode(IFX_FileRead* file_ptr,
-                 FX_DWORD& width,
-                 FX_DWORD& height,
-                 FX_DWORD& pitch,
-                 uint8_t*& dest_buf) override;
   void* CreateJbig2Context() override;
   FXCODEC_STATUS StartDecode(void* pJbig2Context,
                              FX_DWORD width,
@@ -339,13 +326,6 @@ class CCodec_Jbig2Module : public ICodec_Jbig2Module {
                              uint8_t* dest_buf,
                              FX_DWORD dest_pitch,
                              IFX_Pause* pPause) override;
-  FXCODEC_STATUS StartDecode(void* pJbig2Context,
-                             IFX_FileRead* file_ptr,
-                             FX_DWORD& width,
-                             FX_DWORD& height,
-                             FX_DWORD& pitch,
-                             uint8_t*& dest_buf,
-                             IFX_Pause* pPause) override;
   FXCODEC_STATUS ContinueDecode(void* pJbig2Context,
                                 IFX_Pause* pPause) override;
   void DestroyJbig2Context(void* pJbig2Context) override;
diff --git a/core/src/fxcodec/codec/fx_codec_jbig.cpp b/core/src/fxcodec/codec/fx_codec_jbig.cpp
index 1551060b60..b95461b3e5 100644
--- a/core/src/fxcodec/codec/fx_codec_jbig.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jbig.cpp
@@ -22,69 +22,6 @@ void CCodec_Jbig2Module::DestroyJbig2Context(void* pJbig2Content) {
   }
   pJbig2Content = NULL;
 }
-FX_BOOL CCodec_Jbig2Module::Decode(FX_DWORD width,
-                                   FX_DWORD height,
-                                   const uint8_t* src_buf,
-                                   FX_DWORD src_size,
-                                   const uint8_t* global_data,
-                                   FX_DWORD global_size,
-                                   uint8_t* dest_buf,
-                                   FX_DWORD dest_pitch) {
-  FXSYS_memset(dest_buf, 0, height * dest_pitch);
-  CJBig2_Context* pContext = CJBig2_Context::CreateContext(
-      &m_Module, (uint8_t*)global_data, global_size, (uint8_t*)src_buf,
-      src_size, JBIG2_EMBED_STREAM, &m_SymbolDictCache);
-  if (pContext == NULL) {
-    return FALSE;
-  }
-  int ret = pContext->getFirstPage(dest_buf, width, height, dest_pitch, NULL);
-  CJBig2_Context::DestroyContext(pContext);
-  if (ret != JBIG2_SUCCESS) {
-    return FALSE;
-  }
-  int dword_size = height * dest_pitch / 4;
-  FX_DWORD* dword_buf = (FX_DWORD*)dest_buf;
-  for (int i = 0; i < dword_size; i++) {
-    dword_buf[i] = ~dword_buf[i];
-  }
-  return TRUE;
-}
-FX_BOOL CCodec_Jbig2Module::Decode(IFX_FileRead* file_ptr,
-                                   FX_DWORD& width,
-                                   FX_DWORD& height,
-                                   FX_DWORD& pitch,
-                                   uint8_t*& dest_buf) {
-  CJBig2_Context* pContext = NULL;
-  CJBig2_Image* dest_image = NULL;
-  FX_DWORD src_size = (FX_DWORD)file_ptr->GetSize();
-  uint8_t* src_buf = FX_Alloc(uint8_t, src_size);
-  int ret = 0;
-  if (!file_ptr->ReadBlock(src_buf, 0, src_size)) {
-    goto failed;
-  }
-  pContext =
-      CJBig2_Context::CreateContext(&m_Module, NULL, 0, src_buf, src_size,
-                                    JBIG2_FILE_STREAM, &m_SymbolDictCache);
-  if (pContext == NULL) {
-    goto failed;
-  }
-  ret = pContext->getFirstPage(&dest_image, NULL);
-  CJBig2_Context::DestroyContext(pContext);
-  if (ret != JBIG2_SUCCESS) {
-    goto failed;
-  }
-  width = (FX_DWORD)dest_image->m_nWidth;
-  height = (FX_DWORD)dest_image->m_nHeight;
-  pitch = (FX_DWORD)dest_image->m_nStride;
-  dest_buf = dest_image->m_pData;
-  dest_image->m_bNeedFree = FALSE;
-  delete dest_image;
-  FX_Free(src_buf);
-  return TRUE;
-failed:
-  FX_Free(src_buf);
-  return FALSE;
-}
 FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(void* pJbig2Context,
                                                FX_DWORD width,
                                                FX_DWORD height,
@@ -134,62 +71,6 @@ FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(void* pJbig2Context,
   }
   return m_pJbig2Context->m_pContext->GetProcessiveStatus();
 }
-FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(void* pJbig2Context,
-                                               IFX_FileRead* file_ptr,
-                                               FX_DWORD& width,
-                                               FX_DWORD& height,
-                                               FX_DWORD& pitch,
-                                               uint8_t*& dest_buf,
-                                               IFX_Pause* pPause) {
-  if (!pJbig2Context) {
-    return FXCODEC_STATUS_ERR_PARAMS;
-  }
-  CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context;
-  m_pJbig2Context->m_bFileReader = TRUE;
-  m_pJbig2Context->m_dest_image = NULL;
-  m_pJbig2Context->m_src_size = (FX_DWORD)file_ptr->GetSize();
-  m_pJbig2Context->m_src_buf = FX_Alloc(uint8_t, m_pJbig2Context->m_src_size);
-  int ret = 0;
-  if (!file_ptr->ReadBlock((void*)m_pJbig2Context->m_src_buf, 0,
-                           m_pJbig2Context->m_src_size)) {
-    goto failed;
-  }
-  m_pJbig2Context->m_pContext = CJBig2_Context::CreateContext(
-      &m_Module, NULL, 0, m_pJbig2Context->m_src_buf,
-      m_pJbig2Context->m_src_size, JBIG2_FILE_STREAM, &m_SymbolDictCache,
-      pPause);
-  if (m_pJbig2Context->m_pContext == NULL) {
-    goto failed;
-  }
-  ret = m_pJbig2Context->m_pContext->getFirstPage(
-      &m_pJbig2Context->m_dest_image, pPause);
-  if (m_pJbig2Context->m_pContext->GetProcessiveStatus() ==
-      FXCODEC_STATUS_DECODE_TOBECONTINUE) {
-    width = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nWidth;
-    height = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nHeight;
-    pitch = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nStride;
-    dest_buf = m_pJbig2Context->m_dest_image->m_pData;
-    m_pJbig2Context->m_dest_image->m_bNeedFree = FALSE;
-    return FXCODEC_STATUS_DECODE_TOBECONTINUE;
-  }
-  CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext);
-  m_pJbig2Context->m_pContext = NULL;
-  if (ret != JBIG2_SUCCESS) {
-    goto failed;
-  }
-  width = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nWidth;
-  height = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nHeight;
-  pitch = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nStride;
-  dest_buf = m_pJbig2Context->m_dest_image->m_pData;
-  m_pJbig2Context->m_dest_image->m_bNeedFree = FALSE;
-  delete m_pJbig2Context->m_dest_image;
-  FX_Free(m_pJbig2Context->m_src_buf);
-  return FXCODEC_STATUS_DECODE_FINISH;
-failed:
-  FX_Free(m_pJbig2Context->m_src_buf);
-  m_pJbig2Context->m_src_buf = NULL;
-  return FXCODEC_STATUS_ERROR;
-}
 FXCODEC_STATUS CCodec_Jbig2Module::ContinueDecode(void* pJbig2Context,
                                                   IFX_Pause* pPause) {
   CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context;
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.cpp b/core/src/fxcodec/jbig2/JBig2_Context.cpp
index 4a08c21949..c66c2ebaea 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Context.cpp
@@ -17,11 +17,6 @@
 // difference for typical JBIG2 documents.
 const int kSymbolDictCacheMaxSize = 2;
 
-void OutputBitmap(CJBig2_Image* pImage) {
-  if (!pImage) {
-    return;
-  }
-}
 CJBig2_Context* CJBig2_Context::CreateContext(
     CJBig2_Module* pModule,
     uint8_t* pGlobalData,
@@ -170,7 +165,6 @@ int32_t CJBig2_Context::decode_SquentialOrgnazation(IFX_Pause* pPause) {
       } else {
         m_pStream->offset(4);
       }
-      OutputBitmap(m_pPage);
       m_pSegment = NULL;
       if (m_pStream->getByteLeft() > 0 && m_pPage && pPause &&
           pPause->NeedToPauseNow()) {
@@ -303,41 +297,6 @@ int32_t CJBig2_Context::Continue(IFX_Pause* pPause) {
   }
   return nRet;
 }
-int32_t CJBig2_Context::getNextPage(uint8_t* pBuf,
-                                    int32_t width,
-                                    int32_t height,
-                                    int32_t stride,
-                                    IFX_Pause* pPause) {
-  int32_t nRet = JBIG2_ERROR_STREAM_TYPE;
-  m_bFirstPage = FALSE;
-  m_PauseStep = 0;
-  delete m_pPage;
-  JBIG2_ALLOC(m_pPage, CJBig2_Image(width, height, stride, pBuf));
-  m_bBufSpecified = TRUE;
-  if (m_pPage && pPause && pPause->NeedToPauseNow()) {
-    m_PauseStep = 1;
-    m_ProcessiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
-    return nRet;
-  }
-  return Continue(pPause);
-  switch (m_nStreamType) {
-    case JBIG2_FILE_STREAM:
-      nRet = decodeFile(pPause);
-      break;
-    case JBIG2_SQUENTIAL_STREAM:
-      nRet = decode_SquentialOrgnazation(pPause);
-      break;
-    case JBIG2_RANDOM_STREAM:
-      nRet = decode_RandomOrgnazation(pPause);
-      break;
-    case JBIG2_EMBED_STREAM:
-      nRet = decode_EmbedOrgnazation(pPause);
-      break;
-    default:
-      return JBIG2_ERROR_STREAM_TYPE;
-  }
-  return nRet;
-}
 int32_t CJBig2_Context::getFirstPage(CJBig2_Image** image, IFX_Pause* pPause) {
   int32_t nRet;
   m_bFirstPage = TRUE;
@@ -351,34 +310,6 @@ int32_t CJBig2_Context::getFirstPage(CJBig2_Image** image, IFX_Pause* pPause) {
   m_bBufSpecified = FALSE;
   return Continue(pPause);
 }
-int32_t CJBig2_Context::getNextPage(CJBig2_Image** image, IFX_Pause* pPause) {
-  int32_t nRet;
-  m_bBufSpecified = FALSE;
-  m_bFirstPage = FALSE;
-  m_PauseStep = 0;
-  switch (m_nStreamType) {
-    case JBIG2_FILE_STREAM:
-      nRet = decodeFile(pPause);
-      break;
-    case JBIG2_SQUENTIAL_STREAM:
-      nRet = decode_SquentialOrgnazation(pPause);
-      break;
-    case JBIG2_RANDOM_STREAM:
-      nRet = decode_RandomOrgnazation(pPause);
-      break;
-    case JBIG2_EMBED_STREAM:
-      nRet = decode_EmbedOrgnazation(pPause);
-      break;
-    default:
-      return JBIG2_ERROR_STREAM_TYPE;
-  }
-  if (nRet == JBIG2_SUCCESS) {
-    *image = m_pPage;
-    m_pPage = NULL;
-    return JBIG2_SUCCESS;
-  }
-  return nRet;
-}
 CJBig2_Segment* CJBig2_Context::findSegmentByNumber(FX_DWORD dwNumber) {
   CJBig2_Segment* pSeg;
   int32_t i;
@@ -1556,7 +1487,6 @@ int32_t CJBig2_Context::parseGenericRegion(CJBig2_Segment* pSegment,
     } else {
       m_ProcessiveStatus = m_pGRD->Continue_decode(pPause);
     }
-    OutputBitmap(pSegment->m_Result.im);
     if (m_ProcessiveStatus == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
       if (pSegment->m_cFlags.s.type != 36) {
         if (!m_bBufSpecified) {
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.h b/core/src/fxcodec/jbig2/JBig2_Context.h
index 25261a17bf..eb0ceb0eb9 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.h
+++ b/core/src/fxcodec/jbig2/JBig2_Context.h
@@ -56,15 +56,8 @@ class CJBig2_Context : public CJBig2_Object {
                        int32_t stride,
                        IFX_Pause* pPause);
 
-  int32_t getNextPage(uint8_t* pBuf,
-                      int32_t width,
-                      int32_t height,
-                      int32_t stride,
-                      IFX_Pause* pPause);
-
   int32_t getFirstPage(CJBig2_Image** image, IFX_Pause* pPause);
 
-  int32_t getNextPage(CJBig2_Image** image, IFX_Pause* pPause);
   int32_t Continue(IFX_Pause* pPause);
   FXCODEC_STATUS GetProcessiveStatus() { return m_ProcessiveStatus; }
 
diff --git a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
index a4100320cb..a2dc397af2 100644
--- a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
@@ -66,123 +66,6 @@ CJBig2_Image* CJBig2_GRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
     }
   }
 }
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template0_opt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  CJBig2_Image* GBREG;
-  FX_DWORD line1, line2, line3;
-  LTP = 0;
-  JBIG2_ALLOC(GBREG, 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(2, h - 2);
-      line1 |= GBREG->getPixel(1, h - 2) << 1;
-      line1 |= GBREG->getPixel(0, h - 2) << 2;
-      line2 = GBREG->getPixel(3, h - 1);
-      line2 |= GBREG->getPixel(2, h - 1) << 1;
-      line2 |= GBREG->getPixel(1, h - 1) << 2;
-      line2 |= GBREG->getPixel(0, h - 1) << 3;
-      line3 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, h)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line3;
-          CONTEXT |= line2 << 4;
-          CONTEXT |= line1 << 11;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          GBREG->setPixel(w, h, bVal);
-        }
-        line1 = ((line1 << 1) | GBREG->getPixel(w + 3, h - 2)) & 0x1f;
-        line2 = ((line2 << 1) | GBREG->getPixel(w + 4, h - 1)) & 0x7f;
-        line3 = ((line3 << 1) | bVal) & 0x0f;
-      }
-    }
-  }
-  return GBREG;
-}
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template0_opt2(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  CJBig2_Image* GBREG;
-  FX_DWORD line1, line2;
-  uint8_t *pLine, cVal;
-  intptr_t nStride, nStride2;
-  int32_t nBits, k;
-  LTP = 0;
-  JBIG2_ALLOC(GBREG, CJBig2_Image(GBW, GBH));
-  if (GBREG->m_pData == NULL) {
-    delete GBREG;
-    m_pModule->JBig2_Error(
-        "Generic region decoding procedure: Create Image Failed with width = "
-        "%d, height = %d\n",
-        GBW, GBH);
-    return NULL;
-  }
-  pLine = GBREG->m_pData;
-  nStride = GBREG->m_nStride;
-  nStride2 = nStride << 1;
-  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 = (h > 1) ? pLine[-nStride2] << 6 : 0;
-      line2 = (h > 0) ? pLine[-nStride] : 0;
-      CONTEXT = (line1 & 0xf800) | (line2 & 0x07f0);
-      for (FX_DWORD w = 0; w < GBW; w += 8) {
-        if (w + 8 < GBW) {
-          nBits = 8;
-          if (h > 1) {
-            line1 = (line1 << 8) | (pLine[-nStride2 + (w >> 3) + 1] << 6);
-          }
-          if (h > 0) {
-            line2 = (line2 << 8) | (pLine[-nStride + (w >> 3) + 1]);
-          }
-        } else {
-          nBits = GBW - w;
-          if (h > 1) {
-            line1 <<= 8;
-          }
-          if (h > 0) {
-            line2 <<= 8;
-          }
-        }
-        cVal = 0;
-        for (k = 0; k < nBits; k++) {
-          if (USESKIP && SKIP->getPixel(w, h)) {
-            bVal = 0;
-          } else {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          }
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x7bf7) << 1) | bVal |
-                    ((line1 >> (7 - k)) & 0x0800) |
-                    ((line2 >> (7 - k)) & 0x0010);
-        }
-        pLine[w >> 3] = cVal;
-      }
-    }
-    pLine += nStride;
-  }
-  return GBREG;
-}
 CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template0_opt3(
     CJBig2_ArithDecoder* pArithDecoder,
     JBig2ArithCtx* gbContext) {
@@ -326,123 +209,6 @@ CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template0_unopt(
   }
   return GBREG;
 }
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template1_opt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  CJBig2_Image* GBREG;
-  FX_DWORD line1, line2, line3;
-  LTP = 0;
-  JBIG2_ALLOC(GBREG, 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(3, h - 1);
-      line2 |= GBREG->getPixel(2, h - 1) << 1;
-      line2 |= GBREG->getPixel(1, h - 1) << 2;
-      line2 |= GBREG->getPixel(0, h - 1) << 3;
-      line3 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, h)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line3;
-          CONTEXT |= line2 << 3;
-          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 + 4, h - 1)) & 0x3f;
-        line3 = ((line3 << 1) | bVal) & 0x07;
-      }
-    }
-  }
-  return GBREG;
-}
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template1_opt2(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  CJBig2_Image* GBREG;
-  FX_DWORD line1, line2;
-  uint8_t *pLine, cVal;
-  intptr_t nStride, nStride2;
-  int32_t nBits, k;
-  LTP = 0;
-  JBIG2_ALLOC(GBREG, CJBig2_Image(GBW, GBH));
-  if (GBREG->m_pData == NULL) {
-    delete GBREG;
-    m_pModule->JBig2_Error(
-        "Generic region decoding procedure: Create Image Failed with width = "
-        "%d, height = %d\n",
-        GBW, GBH);
-    return NULL;
-  }
-  pLine = GBREG->m_pData;
-  nStride = GBREG->m_nStride;
-  nStride2 = nStride << 1;
-  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 = (h > 1) ? pLine[-nStride2] << 4 : 0;
-      line2 = (h > 0) ? pLine[-nStride] : 0;
-      CONTEXT = (line1 & 0x1e00) | ((line2 >> 1) & 0x01f8);
-      for (FX_DWORD w = 0; w < GBW; w += 8) {
-        if (w + 8 < GBW) {
-          nBits = 8;
-          if (h > 1) {
-            line1 = (line1 << 8) | (pLine[-nStride2 + (w >> 3) + 1] << 4);
-          }
-          if (h > 0) {
-            line2 = (line2 << 8) | (pLine[-nStride + (w >> 3) + 1]);
-          }
-        } else {
-          nBits = GBW - w;
-          if (h > 1) {
-            line1 <<= 8;
-          }
-          if (h > 0) {
-            line2 <<= 8;
-          }
-        }
-        cVal = 0;
-        for (k = 0; k < nBits; k++) {
-          if (USESKIP && SKIP->getPixel(w, h)) {
-            bVal = 0;
-          } else {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          }
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x0efb) << 1) | bVal |
-                    ((line1 >> (7 - k)) & 0x0200) |
-                    ((line2 >> (8 - k)) & 0x0008);
-        }
-        pLine[w >> 3] = cVal;
-      }
-    }
-    pLine += nStride;
-  }
-  return GBREG;
-}
 CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template1_opt3(
     CJBig2_ArithDecoder* pArithDecoder,
     JBig2ArithCtx* gbContext) {
@@ -583,121 +349,6 @@ CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template1_unopt(
   }
   return GBREG;
 }
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template2_opt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  CJBig2_Image* GBREG;
-  FX_DWORD line1, line2, line3;
-  LTP = 0;
-  JBIG2_ALLOC(GBREG, 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(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 |= line2 << 2;
-          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 + 3, h - 1)) & 0x1f;
-        line3 = ((line3 << 1) | bVal) & 0x03;
-      }
-    }
-  }
-  return GBREG;
-}
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template2_opt2(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  CJBig2_Image* GBREG;
-  FX_DWORD line1, line2;
-  uint8_t *pLine, cVal;
-  intptr_t nStride, nStride2;
-  int32_t nBits, k;
-  LTP = 0;
-  JBIG2_ALLOC(GBREG, CJBig2_Image(GBW, GBH));
-  if (GBREG->m_pData == NULL) {
-    delete GBREG;
-    m_pModule->JBig2_Error(
-        "Generic region decoding procedure: Create Image Failed with width = "
-        "%d, height = %d\n",
-        GBW, GBH);
-    return NULL;
-  }
-  pLine = GBREG->m_pData;
-  nStride = GBREG->m_nStride;
-  nStride2 = nStride << 1;
-  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 = (h > 1) ? pLine[-nStride2] << 1 : 0;
-      line2 = (h > 0) ? pLine[-nStride] : 0;
-      CONTEXT = (line1 & 0x0380) | ((line2 >> 3) & 0x007c);
-      for (FX_DWORD w = 0; w < GBW; w += 8) {
-        if (w + 8 < GBW) {
-          nBits = 8;
-          if (h > 1) {
-            line1 = (line1 << 8) | (pLine[-nStride2 + (w >> 3) + 1] << 1);
-          }
-          if (h > 0) {
-            line2 = (line2 << 8) | (pLine[-nStride + (w >> 3) + 1]);
-          }
-        } else {
-          nBits = GBW - w;
-          if (h > 1) {
-            line1 <<= 8;
-          }
-          if (h > 0) {
-            line2 <<= 8;
-          }
-        }
-        cVal = 0;
-        for (k = 0; k < nBits; k++) {
-          if (USESKIP && SKIP->getPixel(w, h)) {
-            bVal = 0;
-          } else {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          }
-          cVal |= bVal << (7 - k);
-          CONTEXT = ((CONTEXT & 0x01bd) << 1) | bVal |
-                    ((line1 >> (7 - k)) & 0x0080) |
-                    ((line2 >> (10 - k)) & 0x0004);
-        }
-        pLine[w >> 3] = cVal;
-      }
-    }
-    pLine += nStride;
-  }
-  return GBREG;
-}
 CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template2_opt3(
     CJBig2_ArithDecoder* pArithDecoder,
     JBig2ArithCtx* gbContext) {
@@ -836,108 +487,6 @@ CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template2_unopt(
   }
   return GBREG;
 }
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template3_opt(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  CJBig2_Image* GBREG;
-  FX_DWORD line1, line2;
-  LTP = 0;
-  JBIG2_ALLOC(GBREG, 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(2, h - 1);
-      line1 |= GBREG->getPixel(1, h - 1) << 1;
-      line1 |= GBREG->getPixel(0, h - 1) << 2;
-      line2 = 0;
-      for (FX_DWORD w = 0; w < GBW; w++) {
-        if (USESKIP && SKIP->getPixel(w, h)) {
-          bVal = 0;
-        } else {
-          CONTEXT = line2;
-          CONTEXT |= line1 << 4;
-          bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-        }
-        if (bVal) {
-          GBREG->setPixel(w, h, bVal);
-        }
-        line1 = ((line1 << 1) | GBREG->getPixel(w + 3, h - 1)) & 0x3f;
-        line2 = ((line2 << 1) | bVal) & 0x0f;
-      }
-    }
-  }
-  return GBREG;
-}
-CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template3_opt2(
-    CJBig2_ArithDecoder* pArithDecoder,
-    JBig2ArithCtx* gbContext) {
-  FX_BOOL LTP, SLTP, bVal;
-  FX_DWORD CONTEXT;
-  CJBig2_Image* GBREG;
-  FX_DWORD line1;
-  uint8_t *pLine, cVal;
-  intptr_t nStride;
-  int32_t nBits, k;
-  LTP = 0;
-  JBIG2_ALLOC(GBREG, CJBig2_Image(GBW, GBH));
-  if (GBREG->m_pData == NULL) {
-    delete GBREG;
-    m_pModule->JBig2_Error(
-        "Generic region decoding procedure: Create Image Failed with width = "
-        "%d, height = %d\n",
-        GBW, GBH);
-    return NULL;
-  }
-  pLine = GBREG->m_pData;
-  nStride = GBREG->m_nStride;
-  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 = (h > 0) ? pLine[-nStride] : 0;
-      CONTEXT = (line1 >> 1) & 0x03f0;
-      for (FX_DWORD w = 0; w < GBW; w += 8) {
-        if (w + 8 < GBW) {
-          nBits = 8;
-          if (h > 0) {
-            line1 = (line1 << 8) | (pLine[-nStride + (w >> 3) + 1]);
-          }
-        } else {
-          nBits = GBW - w;
-          if (h > 0) {
-            line1 <<= 8;
-          }
-        }
-        cVal = 0;
-        for (k = 0; k < nBits; k++) {
-          if (USESKIP && SKIP->getPixel(w, h)) {
-            bVal = 0;
-          } else {
-            bVal = pArithDecoder->DECODE(&gbContext[CONTEXT]);
-          }
-          cVal |= bVal << (7 - k);
-          CONTEXT =
-              ((CONTEXT & 0x01f7) << 1) | bVal | ((line1 >> (8 - k)) & 0x0010);
-        }
-        pLine[w >> 3] = cVal;
-      }
-    }
-    pLine += nStride;
-  }
-  return GBREG;
-}
 CJBig2_Image* CJBig2_GRDProc::decode_Arith_Template3_opt3(
     CJBig2_ArithDecoder* pArithDecoder,
     JBig2ArithCtx* gbContext) {
diff --git a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.h b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.h
index 0b087a0ec1..36839100fa 100644
--- a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.h
+++ b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.h
@@ -99,48 +99,24 @@ class CJBig2_GRDProc : public CJBig2_Object {
       CJBig2_ArithDecoder* pArithDecoder,
       JBig2ArithCtx* gbContext,
       IFX_Pause* pPause);
-  CJBig2_Image* decode_Arith_Template0_opt(CJBig2_ArithDecoder* pArithDecoder,
-                                           JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template0_opt2(CJBig2_ArithDecoder* pArithDecoder,
-                                            JBig2ArithCtx* gbContext);
-
   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_opt(CJBig2_ArithDecoder* pArithDecoder,
-                                           JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template1_opt2(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_opt(CJBig2_ArithDecoder* pArithDecoder,
-                                           JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template2_opt2(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_opt(CJBig2_ArithDecoder* pArithDecoder,
-                                           JBig2ArithCtx* gbContext);
-
-  CJBig2_Image* decode_Arith_Template3_opt2(CJBig2_ArithDecoder* pArithDecoder,
-                                            JBig2ArithCtx* gbContext);
-
   CJBig2_Image* decode_Arith_Template3_opt3(CJBig2_ArithDecoder* pArithDecoder,
                                             JBig2ArithCtx* gbContext);
 
diff --git a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.h b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.h
index e6f1592fc4..64c52176be 100644
--- a/core/src/fxcodec/jbig2/JBig2_HuffmanTable.h
+++ b/core/src/fxcodec/jbig2/JBig2_HuffmanTable.h
@@ -17,8 +17,6 @@ class CJBig2_HuffmanTable : public CJBig2_Object {
 
   ~CJBig2_HuffmanTable();
 
-  void init();
-
   int parseFromStandardTable(const JBig2TableLine* pTable,
                              int nLines,
                              FX_BOOL bHTOOB);
@@ -28,6 +26,8 @@ class CJBig2_HuffmanTable : public CJBig2_Object {
   FX_BOOL isOK() { return m_bOK; }
 
  private:
+  void init();
+
   FX_BOOL HTOOB;
   int NTEMP;
   int* CODES;
diff --git a/core/src/fxcodec/jbig2/JBig2_Image.cpp b/core/src/fxcodec/jbig2/JBig2_Image.cpp
index 772e4e5f62..f1adfc6152 100644
--- a/core/src/fxcodec/jbig2/JBig2_Image.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Image.cpp
@@ -129,547 +129,7 @@ FX_BOOL CJBig2_Image::composeTo(CJBig2_Image* pDst,
   }
   return composeTo_opt2(pDst, x, y, op, pSrcRect);
 }
-FX_BOOL CJBig2_Image::composeTo_unopt(CJBig2_Image* pDst,
-                                      int32_t x,
-                                      int32_t y,
-                                      JBig2ComposeOp op) {
-  int32_t w, h, dx, dy;
-  int32_t i, j;
-  w = m_nWidth;
-  h = m_nHeight;
-  dx = dy = 0;
-  if (x < 0) {
-    dx += -x;
-    w -= -x;
-    x = 0;
-  }
-  if (y < 0) {
-    dy += -y;
-    h -= -y;
-    y = 0;
-  }
-  if (x + w > pDst->m_nWidth) {
-    w = pDst->m_nWidth - x;
-  }
-  if (y + h > pDst->m_nHeight) {
-    h = pDst->m_nHeight - y;
-  }
-  switch (op) {
-    case JBIG2_COMPOSE_OR:
-      for (j = 0; j < h; j++) {
-        for (i = 0; i < w; i++) {
-          pDst->setPixel(
-              x + i, y + j,
-              (getPixel(i + dx, j + dy) | pDst->getPixel(x + i, y + j)) & 1);
-        }
-      }
-      break;
-    case JBIG2_COMPOSE_AND:
-      for (j = 0; j < h; j++) {
-        for (i = 0; i < w; i++) {
-          pDst->setPixel(
-              x + i, y + j,
-              (getPixel(i + dx, j + dy) & pDst->getPixel(x + i, y + j)) & 1);
-        }
-      }
-      break;
-    case JBIG2_COMPOSE_XOR:
-      for (j = 0; j < h; j++) {
-        for (i = 0; i < w; i++) {
-          pDst->setPixel(
-              x + i, y + j,
-              (getPixel(i + dx, j + dy) ^ pDst->getPixel(x + i, y + j)) & 1);
-        }
-      }
-      break;
-    case JBIG2_COMPOSE_XNOR:
-      for (j = 0; j < h; j++) {
-        for (i = 0; i < w; i++) {
-          pDst->setPixel(
-              x + i, y + j,
-              (~(getPixel(i + dx, j + dy) ^ pDst->getPixel(x + i, y + j))) & 1);
-        }
-      }
-      break;
-    case JBIG2_COMPOSE_REPLACE:
-      for (j = 0; j < h; j++) {
-        for (i = 0; i < w; i++) {
-          pDst->setPixel(x + i, y + j, getPixel(i + dx, j + dy));
-        }
-      }
-      break;
-  }
-  return TRUE;
-}
 
-FX_BOOL CJBig2_Image::composeTo_opt(CJBig2_Image* pDst,
-                                    int32_t x,
-                                    int32_t y,
-                                    JBig2ComposeOp op) {
-  int32_t x0, x1, y0, y1, xx, yy;
-  uint8_t *pLineSrc, *pLineDst, *srcPtr, *destPtr;
-  FX_DWORD src0, src1, src, dest, s1, s2, m1, m2, m3;
-  FX_BOOL oneByte;
-  if (!m_pData) {
-    return FALSE;
-  }
-  if (y < 0) {
-    y0 = -y;
-  } else {
-    y0 = 0;
-  }
-  if (y + m_nHeight > pDst->m_nHeight) {
-    y1 = pDst->m_nHeight - y;
-  } else {
-    y1 = m_nHeight;
-  }
-  if (y0 >= y1) {
-    return FALSE;
-  }
-  if (x >= 0) {
-    x0 = x & ~7;
-  } else {
-    x0 = 0;
-  }
-  x1 = x + m_nWidth;
-  if (x1 > pDst->m_nWidth) {
-    x1 = pDst->m_nWidth;
-  }
-  if (x0 >= x1) {
-    return FALSE;
-  }
-  s1 = x & 7;
-  s2 = 8 - s1;
-  m1 = 0xff >> (x1 & 7);
-  m2 = 0xff << (((x1 & 7) == 0) ? 0 : 8 - (x1 & 7));
-  m3 = (0xff >> s1) & m2;
-  oneByte = x0 == ((x1 - 1) & ~7);
-  pLineDst = pDst->m_pData + y * pDst->m_nStride;
-  pLineSrc = m_pData + y0 * m_nStride;
-  if (oneByte) {
-    if (x >= 0) {
-      switch (op) {
-        case JBIG2_COMPOSE_OR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            dest = *destPtr;
-            dest |= (*srcPtr >> s1) & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_AND: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            dest = *destPtr;
-            dest &= ((0xff00 | *srcPtr) >> s1) | m1;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_XOR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            dest = *destPtr;
-            dest ^= (*srcPtr >> s1) & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_XNOR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            dest = *destPtr;
-            dest ^= ((*srcPtr ^ 0xff) >> s1) & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_REPLACE: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            dest = *destPtr;
-            dest = (dest & ~m3) | ((*srcPtr >> s1) & m3);
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-      }
-    } else {
-      switch (op) {
-        case JBIG2_COMPOSE_OR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            dest = *destPtr;
-            dest |= *srcPtr & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_AND: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            dest = *destPtr;
-            dest &= *srcPtr | m1;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_XOR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            dest = *destPtr;
-            dest ^= *srcPtr & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_XNOR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            dest = *destPtr;
-            dest ^= (*srcPtr ^ 0xff) & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_REPLACE: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            dest = *destPtr;
-            dest = (*srcPtr & m2) | (dest & m1);
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-      }
-    }
-  } else {
-    if (x >= 0) {
-      switch (op) {
-        case JBIG2_COMPOSE_OR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            src1 = *srcPtr++;
-            dest = *destPtr;
-            dest |= src1 >> s1;
-            *destPtr++ = (uint8_t)dest;
-            xx = x0 + 8;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest |= src;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest |= src & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_AND: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            src1 = *srcPtr++;
-            dest = *destPtr;
-            dest &= (0xff00 | src1) >> s1;
-            *destPtr++ = (uint8_t)dest;
-            xx = x0 + 8;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest &= src;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest &= src | m1;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_XOR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            src1 = *srcPtr++;
-            dest = *destPtr;
-            dest ^= src1 >> s1;
-            *destPtr++ = (uint8_t)dest;
-            xx = x0 + 8;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest ^= src;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest ^= src & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_XNOR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            src1 = *srcPtr++;
-            dest = *destPtr;
-            dest ^= (src1 ^ 0xff) >> s1;
-            *destPtr++ = (uint8_t)dest;
-            xx = x0 + 8;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest ^= src ^ 0xff;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest ^= (src ^ 0xff) & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_REPLACE: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst + (x >> 3);
-            srcPtr = pLineSrc;
-            src1 = *srcPtr++;
-            dest = *destPtr;
-            dest = (dest & (0xff << s2)) | (src1 >> s1);
-            *destPtr++ = (uint8_t)dest;
-            xx = x0 + 8;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest = src;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest = (src & m2) | (dest & m1);
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-      }
-    } else {
-      switch (op) {
-        case JBIG2_COMPOSE_OR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            src1 = *srcPtr++;
-            xx = x0;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest |= src;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest |= src & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_AND: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            src1 = *srcPtr++;
-            xx = x0;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest &= src;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest &= src | m1;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_XOR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            src1 = *srcPtr++;
-            xx = x0;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest ^= src;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest ^= src & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_XNOR: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            src1 = *srcPtr++;
-            xx = x0;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest ^= src ^ 0xff;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest ^= (src ^ 0xff) & m2;
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-        case JBIG2_COMPOSE_REPLACE: {
-          for (yy = y0; yy < y1; ++yy) {
-            destPtr = pLineDst;
-            srcPtr = pLineSrc + (-x >> 3);
-            src1 = *srcPtr++;
-            xx = x0;
-            for (; xx < x1 - 8; xx += 8) {
-              dest = *destPtr;
-              src0 = src1;
-              src1 = *srcPtr++;
-              src = (((src0 << 8) | src1) >> s1) & 0xff;
-              dest = src;
-              *destPtr++ = (uint8_t)dest;
-            }
-            dest = *destPtr;
-            src0 = src1;
-            if (srcPtr - pLineSrc < m_nStride) {
-              src1 = *srcPtr++;
-            } else {
-              src1 = 0;
-            }
-            src = (((src0 << 8) | src1) >> s1) & 0xff;
-            dest = (src & m2) | (dest & m1);
-            *destPtr = (uint8_t)dest;
-            pLineDst += pDst->m_nStride;
-            pLineSrc += m_nStride;
-          }
-        } break;
-      }
-    }
-  }
-  return TRUE;
-}
 FX_BOOL CJBig2_Image::composeFrom(int32_t x,
                                   int32_t y,
                                   CJBig2_Image* pSrc,
@@ -689,20 +149,6 @@ FX_BOOL CJBig2_Image::composeFrom(int32_t x,
   }
   return pSrc->composeTo(this, x, y, op, pSrcRect);
 }
-CJBig2_Image* CJBig2_Image::subImage_unopt(int32_t x,
-                                           int32_t y,
-                                           int32_t w,
-                                           int32_t h) {
-  CJBig2_Image* pImage;
-  int32_t i, j;
-  JBIG2_ALLOC(pImage, CJBig2_Image(w, h));
-  for (j = 0; j < h; j++) {
-    for (i = 0; i < w; i++) {
-      pImage->setPixel(i, j, getPixel(x + i, y + j));
-    }
-  }
-  return pImage;
-}
 #define JBIG2_GETDWORD(buf) \
   ((FX_DWORD)(((buf)[0] << 24) | ((buf)[1] << 16) | ((buf)[2] << 8) | (buf)[3]))
 CJBig2_Image* CJBig2_Image::subImage(int32_t x,
diff --git a/core/src/fxcodec/jbig2/JBig2_Image.h b/core/src/fxcodec/jbig2/JBig2_Image.h
index 47215eaa3d..c5d27f36b5 100644
--- a/core/src/fxcodec/jbig2/JBig2_Image.h
+++ b/core/src/fxcodec/jbig2/JBig2_Image.h
@@ -44,16 +44,6 @@ class CJBig2_Image : public CJBig2_Object {
                     JBig2ComposeOp op,
                     const FX_RECT* pSrcRect);
 
-  FX_BOOL composeTo_unopt(CJBig2_Image* pDst,
-                          int32_t x,
-                          int32_t y,
-                          JBig2ComposeOp op);
-
-  FX_BOOL composeTo_opt(CJBig2_Image* pDst,
-                        int32_t x,
-                        int32_t y,
-                        JBig2ComposeOp op);
-
   FX_BOOL composeTo_opt2(CJBig2_Image* pDst,
                          int32_t x,
                          int32_t y,
@@ -73,7 +63,6 @@ class CJBig2_Image : public CJBig2_Object {
                       CJBig2_Image* pSrc,
                       JBig2ComposeOp op,
                       const FX_RECT* pSrcRect);
-  CJBig2_Image* subImage_unopt(int32_t x, int32_t y, int32_t w, int32_t h);
 
   CJBig2_Image* subImage(int32_t x, int32_t y, int32_t w, int32_t h);
 
diff --git a/core/src/fxcodec/jbig2/JBig2_Segment.cpp b/core/src/fxcodec/jbig2/JBig2_Segment.cpp
index afbf71a3df..39e4fafaa1 100644
--- a/core/src/fxcodec/jbig2/JBig2_Segment.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Segment.cpp
@@ -6,12 +6,6 @@
 
 #include "JBig2_Segment.h"
 CJBig2_Segment::CJBig2_Segment() {
-  init();
-}
-CJBig2_Segment::~CJBig2_Segment() {
-  clean();
-}
-void CJBig2_Segment::init() {
   m_dwNumber = 0;
   m_cFlags.c = 0;
   m_nReferred_to_segment_count = 0;
@@ -24,6 +18,9 @@ void CJBig2_Segment::init() {
   m_nResultType = JBIG2_VOID_POINTER;
   m_Result.vd = NULL;
 }
+CJBig2_Segment::~CJBig2_Segment() {
+  clean();
+}
 void CJBig2_Segment::clean() {
   if (m_pReferred_to_segment_numbers) {
     m_pModule->JBig2_Free(m_pReferred_to_segment_numbers);
diff --git a/core/src/fxcodec/jbig2/JBig2_Segment.h b/core/src/fxcodec/jbig2/JBig2_Segment.h
index c9c6d59cd7..82cd8384a0 100644
--- a/core/src/fxcodec/jbig2/JBig2_Segment.h
+++ b/core/src/fxcodec/jbig2/JBig2_Segment.h
@@ -34,8 +34,6 @@ class CJBig2_Segment : public CJBig2_Object {
 
   ~CJBig2_Segment();
 
-  void init();
-
   void clean();
 
  public: