Clean up fx_codec_fax.cpp.

core/fxcodec/codec/fx_codec.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fxcodec/include/fx_codec.h"
 
 #include <cmath>
 #include <memory>
@@ skipping 16 matching lines @@
       m_pGifModule(new CCodec_GifModule),
       m_pBmpModule(new CCodec_BmpModule),
       m_pTiffModule(new CCodec_TiffModule),
 #endif  // PDF_ENABLE_XFA
       m_pFlateModule(new CCodec_FlateModule) {
 }
 
 CCodec_ModuleMgr::~CCodec_ModuleMgr() {}
 
 CCodec_ScanlineDecoder::CCodec_ScanlineDecoder()
-    : m_NextLine(-1), m_pLastScanline(nullptr) {}
+    : CCodec_ScanlineDecoder(0, 0, 0, 0, 0, 0, 0) {}
+
+CCodec_ScanlineDecoder::CCodec_ScanlineDecoder(int nOrigWidth,
+                                               int nOrigHeight,
+                                               int nOutputWidth,
+                                               int nOutputHeight,
+                                               int nComps,
+                                               int nBpc,
+                                               uint32_t nPitch)
+    : m_OrigWidth(nOrigWidth),
+      m_OrigHeight(nOrigHeight),
+      m_OutputWidth(nOutputWidth),
+      m_OutputHeight(nOutputHeight),
+      m_nComps(nComps),
+      m_bpc(nBpc),
+      m_Pitch(nPitch),
+      m_NextLine(-1),
+      m_pLastScanline(nullptr) {}
 
 CCodec_ScanlineDecoder::~CCodec_ScanlineDecoder() {}
 
 const uint8_t* CCodec_ScanlineDecoder::GetScanline(int line) {
   if (m_NextLine == line + 1)
     return m_pLastScanline;
 
   if (m_NextLine < 0 || m_NextLine > line) {
     if (!v_Rewind())
       return nullptr;
@@ skipping 246 matching lines @@
     int bpc) {
   std::unique_ptr<CCodec_RLScanlineDecoder> pRLScanlineDecoder(
       new CCodec_RLScanlineDecoder);
   if (!pRLScanlineDecoder->Create(src_buf, src_size, width, height, nComps,
                                   bpc)) {
     return nullptr;
   }
 
   return pRLScanlineDecoder.release();
 }