diff --git a/BUILD.gn b/BUILD.gn
index 8606748..0d3e67b 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -702,6 +702,7 @@
     "core/fxcodec/codec/ccodec_jbig2module.h",
     "core/fxcodec/codec/ccodec_jpegmodule.h",
     "core/fxcodec/codec/ccodec_jpxmodule.h",
+    "core/fxcodec/codec/ccodec_scanlinedecoder.cpp",
     "core/fxcodec/codec/ccodec_scanlinedecoder.h",
     "core/fxcodec/codec/cjpx_decoder.h",
     "core/fxcodec/codec/codec_int.h",
diff --git a/core/fpdfapi/page/cpdf_streamparser.cpp b/core/fpdfapi/page/cpdf_streamparser.cpp
index 46cbfeb..526f097 100644
--- a/core/fpdfapi/page/cpdf_streamparser.cpp
+++ b/core/fpdfapi/page/cpdf_streamparser.cpp
@@ -26,6 +26,7 @@
 #include "core/fpdfapi/parser/cpdf_string.h"
 #include "core/fpdfapi/parser/fpdf_parser_decode.h"
 #include "core/fpdfapi/parser/fpdf_parser_utility.h"
+#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/fx_codec.h"
 #include "core/fxcrt/fx_extension.h"
 
diff --git a/core/fpdfapi/parser/fpdf_parser_decode.cpp b/core/fpdfapi/parser/fpdf_parser_decode.cpp
index 0180aaf..2c5cb78 100644
--- a/core/fpdfapi/parser/fpdf_parser_decode.cpp
+++ b/core/fpdfapi/parser/fpdf_parser_decode.cpp
@@ -17,6 +17,7 @@
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
 #include "core/fpdfapi/parser/fpdf_parser_utility.h"
+#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/fx_codec.h"
 #include "core/fxcrt/fx_extension.h"
 #include "third_party/base/numerics/safe_math.h"
diff --git a/core/fpdfapi/render/cpdf_dibsource.cpp b/core/fpdfapi/render/cpdf_dibsource.cpp
index 86a01c5..9764d51 100644
--- a/core/fpdfapi/render/cpdf_dibsource.cpp
+++ b/core/fpdfapi/render/cpdf_dibsource.cpp
@@ -21,6 +21,7 @@
 #include "core/fpdfapi/parser/fpdf_parser_decode.h"
 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
 #include "core/fpdfapi/render/cpdf_renderstatus.h"
+#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/codec/cjpx_decoder.h"
 #include "core/fxcodec/fx_codec.h"
 #include "core/fxcrt/cfx_fixedbufgrow.h"
diff --git a/core/fxcodec/codec/ccodec_scanlinedecoder.cpp b/core/fxcodec/codec/ccodec_scanlinedecoder.cpp
new file mode 100644
index 0000000..55b9a2a
--- /dev/null
+++ b/core/fxcodec/codec/ccodec_scanlinedecoder.cpp
@@ -0,0 +1,73 @@
+// Copyright 2017 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/codec/ccodec_scanlinedecoder.h"
+
+#include "core/fxcrt/ifx_pauseindicator.h"
+
+CCodec_ScanlineDecoder::CCodec_ScanlineDecoder()
+    : 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;
+    m_NextLine = 0;
+  }
+  while (m_NextLine < line) {
+    ReadNextLine();
+    m_NextLine++;
+  }
+  m_pLastScanline = ReadNextLine();
+  m_NextLine++;
+  return m_pLastScanline;
+}
+
+bool CCodec_ScanlineDecoder::SkipToScanline(int line,
+                                            IFX_PauseIndicator* pPause) {
+  if (m_NextLine == line || m_NextLine == line + 1)
+    return false;
+
+  if (m_NextLine < 0 || m_NextLine > line) {
+    v_Rewind();
+    m_NextLine = 0;
+  }
+  m_pLastScanline = nullptr;
+  while (m_NextLine < line) {
+    m_pLastScanline = ReadNextLine();
+    m_NextLine++;
+    if (pPause && pPause->NeedToPauseNow()) {
+      return true;
+    }
+  }
+  return false;
+}
+
+uint8_t* CCodec_ScanlineDecoder::ReadNextLine() {
+  return v_GetNextLine();
+}
diff --git a/core/fxcodec/codec/fx_codec.cpp b/core/fxcodec/codec/fx_codec.cpp
index 2681f72..6bcea4b 100644
--- a/core/fxcodec/codec/fx_codec.cpp
+++ b/core/fxcodec/codec/fx_codec.cpp
@@ -12,10 +12,10 @@
 #include <tuple>
 #include <utility>
 
+#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/codec/codec_int.h"
 #include "core/fxcrt/fx_extension.h"
 #include "core/fxcrt/fx_safe_types.h"
-#include "core/fxcrt/ifx_pauseindicator.h"
 #include "third_party/base/logging.h"
 #include "third_party/base/ptr_util.h"
 
@@ -1350,70 +1350,6 @@
 
 CCodec_ModuleMgr::~CCodec_ModuleMgr() {}
 
-CCodec_ScanlineDecoder::CCodec_ScanlineDecoder()
-    : 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;
-    m_NextLine = 0;
-  }
-  while (m_NextLine < line) {
-    ReadNextLine();
-    m_NextLine++;
-  }
-  m_pLastScanline = ReadNextLine();
-  m_NextLine++;
-  return m_pLastScanline;
-}
-
-bool CCodec_ScanlineDecoder::SkipToScanline(int line,
-                                            IFX_PauseIndicator* pPause) {
-  if (m_NextLine == line || m_NextLine == line + 1)
-    return false;
-
-  if (m_NextLine < 0 || m_NextLine > line) {
-    v_Rewind();
-    m_NextLine = 0;
-  }
-  m_pLastScanline = nullptr;
-  while (m_NextLine < line) {
-    m_pLastScanline = ReadNextLine();
-    m_NextLine++;
-    if (pPause && pPause->NeedToPauseNow()) {
-      return true;
-    }
-  }
-  return false;
-}
-
-uint8_t* CCodec_ScanlineDecoder::ReadNextLine() {
-  return v_GetNextLine();
-}
-
 bool CCodec_BasicModule::RunLengthEncode(const uint8_t* src_buf,
                                          uint32_t src_size,
                                          uint8_t** dest_buf,
diff --git a/core/fxcodec/codec/fx_codec_fax.cpp b/core/fxcodec/codec/fx_codec_fax.cpp
index 20aada9..9cd2cb9 100644
--- a/core/fxcodec/codec/fx_codec_fax.cpp
+++ b/core/fxcodec/codec/fx_codec_fax.cpp
@@ -8,6 +8,7 @@
 #include <memory>
 #include <vector>
 
+#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/codec/codec_int.h"
 #include "core/fxcodec/fx_codec.h"
 #include "core/fxcrt/cfx_binarybuf.h"
diff --git a/core/fxcodec/codec/fx_codec_flate.cpp b/core/fxcodec/codec/fx_codec_flate.cpp
index 6482d52..72b2074 100644
--- a/core/fxcodec/codec/fx_codec_flate.cpp
+++ b/core/fxcodec/codec/fx_codec_flate.cpp
@@ -11,6 +11,7 @@
 #include <utility>
 #include <vector>
 
+#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/fx_codec.h"
 #include "core/fxcrt/fx_extension.h"
 #include "third_party/base/numerics/safe_conversions.h"
diff --git a/core/fxcodec/codec/fx_codec_jpeg.cpp b/core/fxcodec/codec/fx_codec_jpeg.cpp
index 521053a..1084529 100644
--- a/core/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/fxcodec/codec/fx_codec_jpeg.cpp
@@ -10,6 +10,7 @@
 #include <utility>
 
 #include "core/fxcodec/codec/ccodec_jpegmodule.h"
+#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/fx_codec.h"
 #include "core/fxcrt/fx_safe_types.h"
 #include "core/fxge/dib/cfx_dibsource.h"
diff --git a/core/fxcodec/fx_codec.h b/core/fxcodec/fx_codec.h
index 926a884..269cd14 100644
--- a/core/fxcodec/fx_codec.h
+++ b/core/fxcodec/fx_codec.h
@@ -20,7 +20,6 @@
 #include "core/fxcodec/codec/ccodec_jbig2module.h"
 #include "core/fxcodec/codec/ccodec_jpegmodule.h"
 #include "core/fxcodec/codec/ccodec_jpxmodule.h"
-#include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/fx_codec_def.h"
 #include "core/fxcrt/fx_coordinates.h"