Rework CCODEC_ProgressiveDecoder.

Rename .cpp file to match class and .h file (!!!)
Put initialziations into header.

Change-Id: I2cbc7608287f8df887ce186d122dcd3db2aef19b
Reviewed-on: https://pdfium-review.googlesource.com/41511
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

2 files changed, 37 insertions, 73 deletions

diff --git a/core/fxcodec/codec/fx_codec_progress.cpp b/core/fxcodec/codec/ccodec_progressivedecoder.cpp
index c5fb1e3a13..ce0ef9767c 100644
--- a/core/fxcodec/codec/fx_codec_progress.cpp
+++ b/core/fxcodec/codec/ccodec_progressivedecoder.cpp
@@ -250,43 +250,8 @@ void CCodec_ProgressiveDecoder::CFXCODEC_VertTable::Calc(int dest_len,
 }
 
 CCodec_ProgressiveDecoder::CCodec_ProgressiveDecoder(
-    CCodec_ModuleMgr* pCodecMgr) {
-  m_pFile = nullptr;
-  m_pCodecMgr = nullptr;
-  m_pSrcBuf = nullptr;
-  m_pDecodeBuf = nullptr;
-  m_pDeviceBitmap = nullptr;
-  m_pSrcPalette = nullptr;
-  m_pCodecMgr = pCodecMgr;
-  m_offSet = 0;
-  m_SrcSize = 0;
-  m_ScanlineSize = 0;
-  m_SrcWidth = 0;
-  m_SrcHeight = 0;
-  m_SrcComponents = 0;
-  m_SrcBPC = 0;
-  m_SrcPassNumber = 0;
-  m_clipBox = FX_RECT(0, 0, 0, 0);
-  m_imagType = FXCODEC_IMAGE_UNKNOWN;
-  m_status = FXCODEC_STATUS_DECODE_FINISH;
-  m_TransMethod = -1;
-  m_SrcRow = 0;
-  m_SrcFormat = FXCodec_Invalid;
-  m_FrameNumber = 0;
-  m_FrameCur = 0;
-  m_SrcPaletteNumber = 0;
-#ifdef PDF_ENABLE_XFA_GIF
-  m_GifPltNumber = 0;
-  m_GifBgIndex = 0;
-  m_pGifPalette = nullptr;
-  m_GifTransIndex = -1;
-  m_GifFrameRect = FX_RECT(0, 0, 0, 0);
-  m_InvalidateGifBuffer = true;
-#endif  // PDF_ENABLE_XFA_GIF
-#ifdef PDF_ENABLE_XFA_BMP
-  m_BmpIsTopBottom = false;
-#endif  // PDF_ENABLE_XFA_BMP
-}
+    CCodec_ModuleMgr* pCodecMgr)
+    : m_pCodecMgr(pCodecMgr) {}
 
 CCodec_ProgressiveDecoder::~CCodec_ProgressiveDecoder() {
   FX_Free(m_pSrcBuf);
@@ -425,7 +390,6 @@ bool CCodec_ProgressiveDecoder::PngAskScanlineBuf(int line, uint8_t** pSrcBuf) {
   return true;
 }
 
-
 void CCodec_ProgressiveDecoder::PngFillScanlineBufCompleted(int pass,
                                                             int line) {
   RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
@@ -1789,7 +1753,7 @@ FXCODEC_STATUS CCodec_ProgressiveDecoder::LoadImageInfo(
   m_SrcPassNumber = 0;
   if (imageType != FXCODEC_IMAGE_UNKNOWN &&
       DetectImageType(imageType, pAttribute)) {
-    m_imagType = imageType;
+    m_imageType = imageType;
     m_status = FXCODEC_STATUS_FRAME_READY;
     return m_status;
   }
@@ -1801,7 +1765,7 @@ FXCODEC_STATUS CCodec_ProgressiveDecoder::LoadImageInfo(
 
   for (int type = FXCODEC_IMAGE_UNKNOWN + 1; type < FXCODEC_IMAGE_MAX; type++) {
     if (DetectImageType(static_cast<FXCODEC_IMAGE_TYPE>(type), pAttribute)) {
-      m_imagType = static_cast<FXCODEC_IMAGE_TYPE>(type);
+      m_imageType = static_cast<FXCODEC_IMAGE_TYPE>(type);
       m_status = FXCODEC_STATUS_FRAME_READY;
       return m_status;
     }
@@ -2312,7 +2276,7 @@ std::pair<FXCODEC_STATUS, size_t> CCodec_ProgressiveDecoder::GetFrames() {
     return {FXCODEC_STATUS_ERROR, 0};
   }
 
-  switch (m_imagType) {
+  switch (m_imageType) {
 #ifdef PDF_ENABLE_XFA_BMP
     case FXCODEC_IMAGE_BMP:
 #endif  // PDF_ENABLE_XFA_BMP
@@ -2413,7 +2377,7 @@ FXCODEC_STATUS CCodec_ProgressiveDecoder::StartDecode(
   if (m_clipBox.IsEmpty()) {
     return FXCODEC_STATUS_ERR_PARAMS;
   }
-  switch (m_imagType) {
+  switch (m_imageType) {
 #ifdef PDF_ENABLE_XFA_BMP
     case FXCODEC_IMAGE_BMP:
       return BmpStartDecode(pDIBitmap);
@@ -2442,7 +2406,7 @@ FXCODEC_STATUS CCodec_ProgressiveDecoder::ContinueDecode() {
   if (m_status != FXCODEC_STATUS_DECODE_TOBECONTINUE)
     return FXCODEC_STATUS_ERROR;
 
-  switch (m_imagType) {
+  switch (m_imageType) {
     case FXCODEC_IMAGE_JPG:
       return JpegContinueDecode();
 #ifdef PDF_ENABLE_XFA_BMP
diff --git a/core/fxcodec/codec/ccodec_progressivedecoder.h b/core/fxcodec/codec/ccodec_progressivedecoder.h
index 979de6ed25..b5890e9d9c 100644
--- a/core/fxcodec/codec/ccodec_progressivedecoder.h
+++ b/core/fxcodec/codec/ccodec_progressivedecoder.h
@@ -73,7 +73,7 @@ class CCodec_ProgressiveDecoder :
                                CFX_DIBAttribute* pAttribute,
                                bool bSkipImageTypeCheck);
 
-  FXCODEC_IMAGE_TYPE GetType() const { return m_imagType; }
+  FXCODEC_IMAGE_TYPE GetType() const { return m_imageType; }
   int32_t GetWidth() const { return m_SrcWidth; }
   int32_t GetHeight() const { return m_SrcHeight; }
   int32_t GetNumComponents() const { return m_SrcComponents; }
@@ -241,6 +241,8 @@ class CCodec_ProgressiveDecoder :
                       double scale_y,
                       int dest_row);
 
+  FXCODEC_STATUS m_status = FXCODEC_STATUS_DECODE_FINISH;
+  FXCODEC_IMAGE_TYPE m_imageType = FXCODEC_IMAGE_UNKNOWN;
   RetainPtr<IFX_SeekableReadStream> m_pFile;
   RetainPtr<CFX_DIBitmap> m_pDeviceBitmap;
   UnownedPtr<CCodec_ModuleMgr> m_pCodecMgr;
@@ -257,44 +259,42 @@ class CCodec_ProgressiveDecoder :
 #ifdef PDF_ENABLE_XFA_TIFF
   std::unique_ptr<CCodec_TiffModule::Context> m_pTiffContext;
 #endif  // PDF_ENABLE_XFA_TIFF
-  FXCODEC_IMAGE_TYPE m_imagType;
-  uint32_t m_offSet;
-  uint8_t* m_pSrcBuf;
-  uint32_t m_SrcSize;
-  uint8_t* m_pDecodeBuf;
-  int m_ScanlineSize;
+  uint32_t m_offSet = 0;
+  uint8_t* m_pSrcBuf = nullptr;
+  uint32_t m_SrcSize = 0;
+  uint8_t* m_pDecodeBuf = nullptr;
+  int m_ScanlineSize = 0;
   CFXCODEC_WeightTable m_WeightHorz;
   CFXCODEC_VertTable m_WeightVert;
   CFXCODEC_HorzTable m_WeightHorzOO;
-  int m_SrcWidth;
-  int m_SrcHeight;
-  int m_SrcComponents;
-  int m_SrcBPC;
+  int m_SrcWidth = 0;
+  int m_SrcHeight = 0;
+  int m_SrcComponents = 0;
+  int m_SrcBPC = 0;
   FX_RECT m_clipBox;
-  int m_startX;
-  int m_startY;
-  int m_sizeX;
-  int m_sizeY;
-  int m_TransMethod;
-  FX_ARGB* m_pSrcPalette;
-  int m_SrcPaletteNumber;
-  int m_SrcRow;
-  FXCodec_Format m_SrcFormat;
-  int m_SrcPassNumber;
-  size_t m_FrameNumber;
-  size_t m_FrameCur;
+  int m_startX = 0;
+  int m_startY = 0;
+  int m_sizeX = 0;
+  int m_sizeY = 0;
+  int m_TransMethod = -1;
+  FX_ARGB* m_pSrcPalette = nullptr;
+  int m_SrcPaletteNumber = 0;
+  int m_SrcRow = 0;
+  FXCodec_Format m_SrcFormat = FXCodec_Invalid;
+  int m_SrcPassNumber = 0;
+  size_t m_FrameNumber = 0;
+  size_t m_FrameCur = 0;
 #ifdef PDF_ENABLE_XFA_GIF
-  int m_GifBgIndex;
-  CFX_GifPalette* m_pGifPalette;
-  int32_t m_GifPltNumber;
-  int m_GifTransIndex;
+  int m_GifBgIndex = 0;
+  CFX_GifPalette* m_pGifPalette = nullptr;
+  int32_t m_GifPltNumber = 0;
+  int m_GifTransIndex = -1;
   FX_RECT m_GifFrameRect;
-  bool m_InvalidateGifBuffer;
+  bool m_InvalidateGifBuffer = true;
 #endif  // PDF_ENABLE_XFA_GIF
 #ifdef PDF_ENABLE_XFA_BMP
-  bool m_BmpIsTopBottom;
+  bool m_BmpIsTopBottom = false;
 #endif  // PDF_ENABLE_XFA_BMP
-  FXCODEC_STATUS m_status;
 };
 
 #endif  // CORE_FXCODEC_CODEC_CCODEC_PROGRESSIVEDECODER_H_