Remove dead JBig2 code.

core/src/fxcodec/jbig2/JBig2_Context.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include <map>
 #include <list>
 #include "JBig2_Context.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
 // again. We key off of the memory location of the dictionary. The
 // 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;
 
-void OutputBitmap(CJBig2_Image* pImage) {
-  if (!pImage) {
-    return;
-  }
-}
 CJBig2_Context* CJBig2_Context::CreateContext(
     CJBig2_Module* pModule,
     uint8_t* pGlobalData,
     FX_DWORD dwGlobalLength,
     uint8_t* pData,
     FX_DWORD dwLength,
     int32_t nStreamType,
     std::list<CJBig2_CachePair>* pSymbolDictCache,
     IFX_Pause* pPause) {
   return new (pModule)
@@ skipping 128 matching lines @@
         m_pSegment = NULL;
         return nRet;
       }
       m_pSegmentList->addItem(m_pSegment);
       if (m_pSegment->m_dwData_length != 0xffffffff) {
         m_dwOffset = m_dwOffset + m_pSegment->m_dwData_length;
         m_pStream->setOffset(m_dwOffset);
       } else {
         m_pStream->offset(4);
       }
-      OutputBitmap(m_pPage);
       m_pSegment = NULL;
       if (m_pStream->getByteLeft() > 0 && m_pPage && pPause &&
           pPause->NeedToPauseNow()) {
         m_ProcessiveStatus = FXCODEC_STATUS_DECODE_TOBECONTINUE;
         m_PauseStep = 2;
         return JBIG2_SUCCESS;
       }
     }
   } else {
     return JBIG2_END_OF_FILE;
@@ skipping 112 matching lines @@
     m_ProcessiveStatus = FXCODEC_STATUS_DECODE_FINISH;
     return JBIG2_SUCCESS;
   }
   if (nRet == JBIG2_SUCCESS) {
     m_ProcessiveStatus = FXCODEC_STATUS_DECODE_FINISH;
   } else {
     m_ProcessiveStatus = FXCODEC_STATUS_ERROR;
   }
   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;
   m_PauseStep = 0;
   if (m_pGlobalContext) {
     nRet = m_pGlobalContext->decode_EmbedOrgnazation(pPause);
     if (nRet != JBIG2_SUCCESS) {
       return nRet;
     }
   }
   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;
   if (m_pGlobalContext) {
     pSeg = m_pGlobalContext->findSegmentByNumber(dwNumber);
     if (pSeg) {
       return pSeg;
     }
   }
   for (i = 0; i < m_pSegmentList->getLength(); i++) {
@@ skipping 1157 matching lines @@
           sizeof(JBig2ArithCtx) * dwTemp);
       JBIG2_memset(m_gbContext, 0, sizeof(JBig2ArithCtx) * dwTemp);
     }
     if (m_pArithDecoder == NULL) {
       JBIG2_ALLOC(m_pArithDecoder, CJBig2_ArithDecoder(m_pStream));
       m_ProcessiveStatus = m_pGRD->Start_decode_Arith(
           &pSegment->m_Result.im, m_pArithDecoder, m_gbContext, pPause);
     } 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) {
           JBig2PageInfo* pPageInfo = m_pPageInfoList->getLast();
           if ((pPageInfo->m_bIsStriped == 1) &&
               (m_ri.y + m_ri.height > m_pPage->m_nHeight)) {
             m_pPage->expand(m_ri.y + m_ri.height,
                             (pPageInfo->m_cFlags & 4) ? 1 : 0);
           }
         }
@@ skipping 317 matching lines @@
         SBSYMCODES[CURTEMP].code = CURCODE;
         CURCODE = CURCODE + 1;
       }
       CURTEMP = CURTEMP + 1;
     }
     CURLEN = CURLEN + 1;
   }
   m_pModule->JBig2_Free(LENCOUNT);
   m_pModule->JBig2_Free(FIRSTCODE);
 }