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>

1 files changed, 2436 insertions, 0 deletions

diff --git a/core/fxcodec/codec/ccodec_progressivedecoder.cpp b/core/fxcodec/codec/ccodec_progressivedecoder.cpp
new file mode 100644
index 0000000000..ce0ef9767c
--- /dev/null
+++ b/core/fxcodec/codec/ccodec_progressivedecoder.cpp
@@ -0,0 +1,2436 @@
+// 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/codec/ccodec_progressivedecoder.h"
+
+#include <algorithm>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "core/fxcodec/fx_codec.h"
+#include "core/fxcrt/fx_stream.h"
+#include "core/fxge/dib/cfx_dibitmap.h"
+#include "core/fxge/fx_dib.h"
+#include "third_party/base/logging.h"
+#include "third_party/base/numerics/safe_math.h"
+#include "third_party/base/ptr_util.h"
+
+#define FXCODEC_BLOCK_SIZE 4096
+
+namespace {
+
+#ifdef PDF_ENABLE_XFA_PNG
+#if _FX_OS_ == _FX_OS_MACOSX_
+const double kPngGamma = 1.7;
+#else   // _FX_OS_ == _FX_OS_MACOSX_
+const double kPngGamma = 2.2;
+#endif  // _FX_OS_ == _FX_OS_MACOSX_
+#endif  // PDF_ENABLE_XFA_PNG
+
+void RGB2BGR(uint8_t* buffer, int width = 1) {
+  if (buffer && width > 0) {
+    uint8_t temp;
+    int i = 0;
+    int j = 0;
+    for (; i < width; i++, j += 3) {
+      temp = buffer[j];
+      buffer[j] = buffer[j + 2];
+      buffer[j + 2] = temp;
+    }
+  }
+}
+
+}  // namespace
+
+CCodec_ProgressiveDecoder::CFXCODEC_WeightTable::CFXCODEC_WeightTable() {}
+
+CCodec_ProgressiveDecoder::CFXCODEC_WeightTable::~CFXCODEC_WeightTable() {}
+
+void CCodec_ProgressiveDecoder::CFXCODEC_WeightTable::Calc(int dest_len,
+                                                           int dest_min,
+                                                           int dest_max,
+                                                           int src_len,
+                                                           int src_min,
+                                                           int src_max) {
+  double scale, base;
+  scale = (float)src_len / (float)dest_len;
+  if (dest_len < 0) {
+    base = (float)(src_len);
+  } else {
+    base = 0.0f;
+  }
+  m_ItemSize =
+      (int)(sizeof(int) * 2 + sizeof(int) * (ceil(fabs((float)scale)) + 1));
+  m_DestMin = dest_min;
+  m_pWeightTables.resize((dest_max - dest_min) * m_ItemSize + 4);
+  if (fabs((float)scale) < 1.0f) {
+    for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel++) {
+      PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
+      double src_pos = dest_pixel * scale + scale / 2 + base;
+      pixel_weights.m_SrcStart = (int)floor((float)src_pos - 1.0f / 2);
+      pixel_weights.m_SrcEnd = (int)floor((float)src_pos + 1.0f / 2);
+      if (pixel_weights.m_SrcStart < src_min) {
+        pixel_weights.m_SrcStart = src_min;
+      }
+      if (pixel_weights.m_SrcEnd >= src_max) {
+        pixel_weights.m_SrcEnd = src_max - 1;
+      }
+      if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
+        pixel_weights.m_Weights[0] = 65536;
+      } else {
+        pixel_weights.m_Weights[1] = FXSYS_round(
+            (float)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 65536);
+        pixel_weights.m_Weights[0] = 65536 - pixel_weights.m_Weights[1];
+      }
+    }
+    return;
+  }
+  for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel++) {
+    PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
+    double src_start = dest_pixel * scale + base;
+    double src_end = src_start + scale;
+    int start_i, end_i;
+    if (src_start < src_end) {
+      start_i = (int)floor((float)src_start);
+      end_i = (int)ceil((float)src_end);
+    } else {
+      start_i = (int)floor((float)src_end);
+      end_i = (int)ceil((float)src_start);
+    }
+    if (start_i < src_min) {
+      start_i = src_min;
+    }
+    if (end_i >= src_max) {
+      end_i = src_max - 1;
+    }
+    if (start_i > end_i) {
+      pixel_weights.m_SrcStart = start_i;
+      pixel_weights.m_SrcEnd = start_i;
+      continue;
+    }
+    pixel_weights.m_SrcStart = start_i;
+    pixel_weights.m_SrcEnd = end_i;
+    for (int j = start_i; j <= end_i; j++) {
+      double dest_start = ((float)j - base) / scale;
+      double dest_end = ((float)(j + 1) - base) / scale;
+      if (dest_start > dest_end) {
+        double temp = dest_start;
+        dest_start = dest_end;
+        dest_end = temp;
+      }
+      double area_start =
+          dest_start > (float)(dest_pixel) ? dest_start : (float)(dest_pixel);
+      double area_end = dest_end > (float)(dest_pixel + 1)
+                            ? (float)(dest_pixel + 1)
+                            : dest_end;
+      double weight = area_start >= area_end ? 0.0f : area_end - area_start;
+      if (weight == 0 && j == end_i) {
+        pixel_weights.m_SrcEnd--;
+        break;
+      }
+      pixel_weights.m_Weights[j - start_i] =
+          FXSYS_round((float)(weight * 65536));
+    }
+  }
+}
+
+CCodec_ProgressiveDecoder::CFXCODEC_HorzTable::CFXCODEC_HorzTable() {}
+
+CCodec_ProgressiveDecoder::CFXCODEC_HorzTable::~CFXCODEC_HorzTable() {}
+
+void CCodec_ProgressiveDecoder::CFXCODEC_HorzTable::Calc(int dest_len,
+                                                         int src_len) {
+  double scale = (double)dest_len / (double)src_len;
+  m_ItemSize = sizeof(int) * 4;
+  int size = dest_len * m_ItemSize + 4;
+  m_pWeightTables.resize(size, 0);
+  if (scale > 1) {
+    int pre_dest_col = 0;
+    for (int src_col = 0; src_col < src_len; src_col++) {
+      double dest_col_f = src_col * scale;
+      int dest_col = FXSYS_round((float)dest_col_f);
+      PixelWeight* pWeight = GetPixelWeight(dest_col);
+      pWeight->m_SrcStart = pWeight->m_SrcEnd = src_col;
+      pWeight->m_Weights[0] = 65536;
+      pWeight->m_Weights[1] = 0;
+      if (src_col == src_len - 1 && dest_col < dest_len - 1) {
+        for (int dest_col_index = pre_dest_col + 1; dest_col_index < dest_len;
+             dest_col_index++) {
+          pWeight = GetPixelWeight(dest_col_index);
+          pWeight->m_SrcStart = pWeight->m_SrcEnd = src_col;
+          pWeight->m_Weights[0] = 65536;
+          pWeight->m_Weights[1] = 0;
+        }
+        return;
+      }
+      int dest_col_len = dest_col - pre_dest_col;
+      for (int dest_col_index = pre_dest_col + 1; dest_col_index < dest_col;
+           dest_col_index++) {
+        pWeight = GetPixelWeight(dest_col_index);
+        pWeight->m_SrcStart = src_col - 1;
+        pWeight->m_SrcEnd = src_col;
+        pWeight->m_Weights[0] =
+            FXSYS_round((float)(((float)dest_col - (float)dest_col_index) /
+                                (float)dest_col_len * 65536));
+        pWeight->m_Weights[1] = 65536 - pWeight->m_Weights[0];
+      }
+      pre_dest_col = dest_col;
+    }
+    return;
+  }
+  for (int dest_col = 0; dest_col < dest_len; dest_col++) {
+    double src_col_f = dest_col / scale;
+    int src_col = FXSYS_round((float)src_col_f);
+    PixelWeight* pWeight = GetPixelWeight(dest_col);
+    pWeight->m_SrcStart = pWeight->m_SrcEnd = src_col;
+    pWeight->m_Weights[0] = 65536;
+    pWeight->m_Weights[1] = 0;
+  }
+}
+
+CCodec_ProgressiveDecoder::CFXCODEC_VertTable::CFXCODEC_VertTable() {}
+
+CCodec_ProgressiveDecoder::CFXCODEC_VertTable::~CFXCODEC_VertTable() {}
+
+void CCodec_ProgressiveDecoder::CFXCODEC_VertTable::Calc(int dest_len,
+                                                         int src_len) {
+  double scale = (double)dest_len / (double)src_len;
+  m_ItemSize = sizeof(int) * 4;
+  int size = dest_len * m_ItemSize + 4;
+  m_pWeightTables.resize(size, 0);
+  if (scale <= 1) {
+    for (int dest_row = 0; dest_row < dest_len; dest_row++) {
+      PixelWeight* pWeight = GetPixelWeight(dest_row);
+      pWeight->m_SrcStart = dest_row;
+      pWeight->m_SrcEnd = dest_row;
+      pWeight->m_Weights[0] = 65536;
+      pWeight->m_Weights[1] = 0;
+    }
+    return;
+  }
+
+  double step = 0.0;
+  int src_row = 0;
+  while (step < (double)dest_len) {
+    int start_step = (int)step;
+    step = scale * (++src_row);
+    int end_step = (int)step;
+    if (end_step >= dest_len) {
+      end_step = dest_len;
+      for (int dest_row = start_step; dest_row < end_step; dest_row++) {
+        PixelWeight* pWeight = GetPixelWeight(dest_row);
+        pWeight->m_SrcStart = start_step;
+        pWeight->m_SrcEnd = start_step;
+        pWeight->m_Weights[0] = 65536;
+        pWeight->m_Weights[1] = 0;
+      }
+      return;
+    }
+    int length = end_step - start_step;
+    {
+      PixelWeight* pWeight = GetPixelWeight(start_step);
+      pWeight->m_SrcStart = start_step;
+      pWeight->m_SrcEnd = start_step;
+      pWeight->m_Weights[0] = 65536;
+      pWeight->m_Weights[1] = 0;
+    }
+    for (int dest_row = start_step + 1; dest_row < end_step; dest_row++) {
+      PixelWeight* pWeight = GetPixelWeight(dest_row);
+      pWeight->m_SrcStart = start_step;
+      pWeight->m_SrcEnd = end_step;
+      pWeight->m_Weights[0] =
+          FXSYS_round((float)(end_step - dest_row) / (float)length * 65536);
+      pWeight->m_Weights[1] = 65536 - pWeight->m_Weights[0];
+    }
+  }
+}
+
+CCodec_ProgressiveDecoder::CCodec_ProgressiveDecoder(
+    CCodec_ModuleMgr* pCodecMgr)
+    : m_pCodecMgr(pCodecMgr) {}
+
+CCodec_ProgressiveDecoder::~CCodec_ProgressiveDecoder() {
+  FX_Free(m_pSrcBuf);
+  FX_Free(m_pDecodeBuf);
+  FX_Free(m_pSrcPalette);
+}
+
+#ifdef PDF_ENABLE_XFA_PNG
+bool CCodec_ProgressiveDecoder::PngReadHeader(int width,
+                                              int height,
+                                              int bpc,
+                                              int pass,
+                                              int* color_type,
+                                              double* gamma) {
+  if (!m_pDeviceBitmap) {
+    m_SrcWidth = width;
+    m_SrcHeight = height;
+    m_SrcBPC = bpc;
+    m_SrcPassNumber = pass;
+    switch (*color_type) {
+      case 0:
+        m_SrcComponents = 1;
+        break;
+      case 4:
+        m_SrcComponents = 2;
+        break;
+      case 2:
+        m_SrcComponents = 3;
+        break;
+      case 3:
+      case 6:
+        m_SrcComponents = 4;
+        break;
+      default:
+        m_SrcComponents = 0;
+        break;
+    }
+    m_clipBox = FX_RECT(0, 0, width, height);
+    return false;
+  }
+  FXDIB_Format format = m_pDeviceBitmap->GetFormat();
+  switch (format) {
+    case FXDIB_1bppMask:
+    case FXDIB_1bppRgb:
+      NOTREACHED();
+      return false;
+    case FXDIB_8bppMask:
+    case FXDIB_8bppRgb:
+      *color_type = 0;
+      break;
+    case FXDIB_Rgb:
+      *color_type = 2;
+      break;
+    case FXDIB_Rgb32:
+    case FXDIB_Argb:
+      *color_type = 6;
+      break;
+    default:
+      NOTREACHED();
+      return false;
+  }
+  *gamma = kPngGamma;
+  return true;
+}
+
+bool CCodec_ProgressiveDecoder::PngAskScanlineBuf(int line, uint8_t** pSrcBuf) {
+  RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
+  if (!pDIBitmap) {
+    NOTREACHED();
+    return false;
+  }
+  if (line >= m_clipBox.top && line < m_clipBox.bottom) {
+    double scale_y = static_cast<double>(m_sizeY) / m_clipBox.Height();
+    int32_t row = (int32_t)((line - m_clipBox.top) * scale_y) + m_startY;
+    const uint8_t* src_scan = pDIBitmap->GetScanline(row);
+    uint8_t* dest_scan = m_pDecodeBuf;
+    *pSrcBuf = m_pDecodeBuf;
+    int32_t src_Bpp = pDIBitmap->GetBPP() >> 3;
+    int32_t dest_Bpp = (m_SrcFormat & 0xff) >> 3;
+    int32_t src_left = m_startX;
+    int32_t dest_left = m_clipBox.left;
+    src_scan += src_left * src_Bpp;
+    dest_scan += dest_left * dest_Bpp;
+    for (int32_t src_col = 0; src_col < m_sizeX; src_col++) {
+      PixelWeight* pPixelWeights = m_WeightHorzOO.GetPixelWeight(src_col);
+      if (pPixelWeights->m_SrcStart != pPixelWeights->m_SrcEnd) {
+        continue;
+      }
+      switch (pDIBitmap->GetFormat()) {
+        case FXDIB_1bppMask:
+        case FXDIB_1bppRgb:
+          NOTREACHED();
+          return false;
+        case FXDIB_8bppMask:
+        case FXDIB_8bppRgb: {
+          if (pDIBitmap->GetPalette()) {
+            return false;
+          }
+          uint32_t dest_g = 0;
+          dest_g += pPixelWeights->m_Weights[0] * src_scan[src_col];
+          dest_scan[pPixelWeights->m_SrcStart] = (uint8_t)(dest_g >> 16);
+        } break;
+        case FXDIB_Rgb:
+        case FXDIB_Rgb32: {
+          uint32_t dest_b = 0;
+          uint32_t dest_g = 0;
+          uint32_t dest_r = 0;
+          const uint8_t* p = src_scan + src_col * src_Bpp;
+          dest_b += pPixelWeights->m_Weights[0] * (*p++);
+          dest_g += pPixelWeights->m_Weights[0] * (*p++);
+          dest_r += pPixelWeights->m_Weights[0] * (*p);
+          uint8_t* pDes = &dest_scan[pPixelWeights->m_SrcStart * dest_Bpp];
+          *pDes++ = (uint8_t)((dest_b) >> 16);
+          *pDes++ = (uint8_t)((dest_g) >> 16);
+          *pDes = (uint8_t)((dest_r) >> 16);
+        } break;
+        case FXDIB_Argb: {
+          uint32_t dest_r = 0;
+          uint32_t dest_g = 0;
+          uint32_t dest_b = 0;
+          const uint8_t* p = src_scan + src_col * src_Bpp;
+          dest_b += pPixelWeights->m_Weights[0] * (*p++);
+          dest_g += pPixelWeights->m_Weights[0] * (*p++);
+          dest_r += pPixelWeights->m_Weights[0] * (*p++);
+          uint8_t* pDes = &dest_scan[pPixelWeights->m_SrcStart * dest_Bpp];
+          *pDes++ = (uint8_t)((dest_b) >> 16);
+          *pDes++ = (uint8_t)((dest_g) >> 16);
+          *pDes++ = (uint8_t)((dest_r) >> 16);
+          *pDes = *p;
+        } break;
+        default:
+          return false;
+      }
+    }
+  }
+  return true;
+}
+
+void CCodec_ProgressiveDecoder::PngFillScanlineBufCompleted(int pass,
+                                                            int line) {
+  RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
+  ASSERT(pDIBitmap);
+  int src_top = m_clipBox.top;
+  int src_bottom = m_clipBox.bottom;
+  int dest_top = m_startY;
+  int src_height = m_clipBox.Height();
+  int dest_height = m_sizeY;
+  if (line >= src_top && line < src_bottom) {
+    double scale_y = static_cast<double>(dest_height) / src_height;
+    int src_row = line - src_top;
+    int dest_row = (int)(src_row * scale_y) + dest_top;
+    if (dest_row >= dest_top + dest_height) {
+      return;
+    }
+    PngOneOneMapResampleHorz(pDIBitmap, dest_row, m_pDecodeBuf, m_SrcFormat);
+    if (m_SrcPassNumber == 1 && scale_y > 1.0) {
+      ResampleVert(pDIBitmap, scale_y, dest_row);
+      return;
+    }
+    if (pass == 6 && scale_y > 1.0) {
+      ResampleVert(pDIBitmap, scale_y, dest_row);
+    }
+  }
+}
+#endif  // PDF_ENABLE_XFA_PNG
+
+#ifdef PDF_ENABLE_XFA_GIF
+void CCodec_ProgressiveDecoder::GifRecordCurrentPosition(uint32_t& cur_pos) {
+  uint32_t remain_size =
+      m_pCodecMgr->GetGifModule()->GetAvailInput(m_pGifContext.get(), nullptr);
+  cur_pos = m_offSet - remain_size;
+}
+
+bool CCodec_ProgressiveDecoder::GifInputRecordPositionBuf(
+    uint32_t rcd_pos,
+    const FX_RECT& img_rc,
+    int32_t pal_num,
+    CFX_GifPalette* pal_ptr,
+    int32_t delay_time,
+    bool user_input,
+    int32_t trans_index,
+    int32_t disposal_method,
+    bool interlace) {
+  m_offSet = rcd_pos;
+  m_InvalidateGifBuffer = true;
+
+  FXCODEC_STATUS error_status = FXCODEC_STATUS_ERROR;
+  if (!GifReadMoreData(m_pCodecMgr->GetGifModule(), error_status)) {
+    return false;
+  }
+  CFX_GifPalette* pPalette = nullptr;
+  if (pal_num != 0 && pal_ptr) {
+    pPalette = pal_ptr;
+  } else {
+    if (!m_pGifPalette)
+      return false;
+    pal_num = m_GifPltNumber;
+    pPalette = m_pGifPalette;
+  }
+  if (!m_pSrcPalette)
+    m_pSrcPalette = FX_Alloc(FX_ARGB, pal_num);
+  else if (pal_num > m_SrcPaletteNumber)
+    m_pSrcPalette = FX_Realloc(FX_ARGB, m_pSrcPalette, pal_num);
+  if (!m_pSrcPalette)
+    return false;
+
+  m_SrcPaletteNumber = pal_num;
+  for (int i = 0; i < pal_num; i++) {
+    m_pSrcPalette[i] =
+        ArgbEncode(0xff, pPalette[i].r, pPalette[i].g, pPalette[i].b);
+  }
+  m_GifTransIndex = trans_index;
+  m_GifFrameRect = img_rc;
+  m_SrcPassNumber = interlace ? 4 : 1;
+  int32_t pal_index = m_GifBgIndex;
+  RetainPtr<CFX_DIBitmap> pDevice = m_pDeviceBitmap;
+  if (trans_index >= pal_num)
+    trans_index = -1;
+  if (trans_index != -1) {
+    m_pSrcPalette[trans_index] &= 0x00ffffff;
+    if (pDevice->HasAlpha())
+      pal_index = trans_index;
+  }
+  if (pal_index >= pal_num)
+    return false;
+
+  int startX = m_startX;
+  int startY = m_startY;
+  int sizeX = m_sizeX;
+  int sizeY = m_sizeY;
+  int Bpp = pDevice->GetBPP() / 8;
+  FX_ARGB argb = m_pSrcPalette[pal_index];
+  for (int row = 0; row < sizeY; row++) {
+    uint8_t* pScanline =
+        pDevice->GetWritableScanline(row + startY) + startX * Bpp;
+    switch (m_TransMethod) {
+      case 3: {
+        uint8_t gray =
+            FXRGB2GRAY(FXARGB_R(argb), FXARGB_G(argb), FXARGB_B(argb));
+        memset(pScanline, gray, sizeX);
+        break;
+      }
+      case 8: {
+        for (int col = 0; col < sizeX; col++) {
+          *pScanline++ = FXARGB_B(argb);
+          *pScanline++ = FXARGB_G(argb);
+          *pScanline++ = FXARGB_R(argb);
+          pScanline += Bpp - 3;
+        }
+        break;
+      }
+      case 12: {
+        for (int col = 0; col < sizeX; col++) {
+          FXARGB_SETDIB(pScanline, argb);
+          pScanline += 4;
+        }
+        break;
+      }
+    }
+  }
+  return true;
+}
+
+void CCodec_ProgressiveDecoder::GifReadScanline(int32_t row_num,
+                                                uint8_t* row_buf) {
+  RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
+  ASSERT(pDIBitmap);
+  int32_t img_width = m_GifFrameRect.Width();
+  if (!pDIBitmap->HasAlpha()) {
+    uint8_t* byte_ptr = row_buf;
+    for (int i = 0; i < img_width; i++) {
+      if (*byte_ptr == m_GifTransIndex) {
+        *byte_ptr = m_GifBgIndex;
+      }
+      byte_ptr++;
+    }
+  }
+  int32_t pal_index = m_GifBgIndex;
+  if (m_GifTransIndex != -1 && m_pDeviceBitmap->HasAlpha()) {
+    pal_index = m_GifTransIndex;
+  }
+  memset(m_pDecodeBuf, pal_index, m_SrcWidth);
+  bool bLastPass = (row_num % 2) == 1;
+  int32_t line = row_num + m_GifFrameRect.top;
+  int32_t left = m_GifFrameRect.left;
+  memcpy(m_pDecodeBuf + left, row_buf, img_width);
+  int src_top = m_clipBox.top;
+  int src_bottom = m_clipBox.bottom;
+  int dest_top = m_startY;
+  int src_height = m_clipBox.Height();
+  int dest_height = m_sizeY;
+  if (line < src_top || line >= src_bottom)
+    return;
+
+  double scale_y = static_cast<double>(dest_height) / src_height;
+  int src_row = line - src_top;
+  int dest_row = (int)(src_row * scale_y) + dest_top;
+  if (dest_row >= dest_top + dest_height)
+    return;
+
+  ReSampleScanline(pDIBitmap, dest_row, m_pDecodeBuf, m_SrcFormat);
+  if (scale_y > 1.0 && m_SrcPassNumber == 1) {
+    ResampleVert(pDIBitmap, scale_y, dest_row);
+    return;
+  }
+  if (scale_y <= 1.0)
+    return;
+
+  int dest_bottom = dest_top + m_sizeY;
+  int dest_Bpp = pDIBitmap->GetBPP() >> 3;
+  uint32_t dest_ScanOffet = m_startX * dest_Bpp;
+  if (dest_row + (int)scale_y >= dest_bottom - 1) {
+    const uint8_t* scan_src = pDIBitmap->GetScanline(dest_row) + dest_ScanOffet;
+    int cur_row = dest_row;
+    while (++cur_row < dest_bottom) {
+      uint8_t* scan_des =
+          pDIBitmap->GetWritableScanline(cur_row) + dest_ScanOffet;
+      uint32_t size = m_sizeX * dest_Bpp;
+      memmove(scan_des, scan_src, size);
+    }
+  }
+  if (bLastPass)
+    GifDoubleLineResampleVert(pDIBitmap, scale_y, dest_row);
+}
+#endif  // PDF_ENABLE_XFA_GIF
+
+#ifdef PDF_ENABLE_XFA_BMP
+bool CCodec_ProgressiveDecoder::BmpInputImagePositionBuf(uint32_t rcd_pos) {
+  m_offSet = rcd_pos;
+  FXCODEC_STATUS error_status = FXCODEC_STATUS_ERROR;
+  return BmpReadMoreData(m_pCodecMgr->GetBmpModule(), error_status);
+}
+
+void CCodec_ProgressiveDecoder::BmpReadScanline(
+    uint32_t row_num,
+    const std::vector<uint8_t>& row_buf) {
+  RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
+  ASSERT(pDIBitmap);
+  std::copy(row_buf.begin(), row_buf.begin() + m_ScanlineSize, m_pDecodeBuf);
+  int src_top = m_clipBox.top;
+  int src_bottom = m_clipBox.bottom;
+  int dest_top = m_startY;
+  int src_height = m_clipBox.Height();
+  int dest_height = m_sizeY;
+  if ((src_top >= 0 && row_num < static_cast<uint32_t>(src_top)) ||
+      src_bottom < 0 || row_num >= static_cast<uint32_t>(src_bottom)) {
+    return;
+  }
+
+  double scale_y = static_cast<double>(dest_height) / src_height;
+  int src_row = row_num - src_top;
+  int dest_row = (int)(src_row * scale_y) + dest_top;
+  if (dest_row >= dest_top + dest_height)
+    return;
+
+  ReSampleScanline(pDIBitmap, dest_row, m_pDecodeBuf, m_SrcFormat);
+  if (scale_y <= 1.0)
+    return;
+
+  if (m_BmpIsTopBottom) {
+    ResampleVert(pDIBitmap, scale_y, dest_row);
+    return;
+  }
+  ResampleVertBT(pDIBitmap, scale_y, dest_row);
+}
+
+void CCodec_ProgressiveDecoder::ResampleVertBT(
+    const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
+    double scale_y,
+    int dest_row) {
+  int dest_Bpp = pDeviceBitmap->GetBPP() >> 3;
+  uint32_t dest_ScanOffet = m_startX * dest_Bpp;
+  int dest_top = m_startY;
+  int dest_bottom = m_startY + m_sizeY;
+  pdfium::base::CheckedNumeric<int> check_dest_row_1 = dest_row;
+  check_dest_row_1 += pdfium::base::checked_cast<int>(scale_y);
+  int dest_row_1 = check_dest_row_1.ValueOrDie();
+  if (dest_row_1 >= dest_bottom - 1) {
+    const uint8_t* scan_src =
+        pDeviceBitmap->GetScanline(dest_row) + dest_ScanOffet;
+    while (++dest_row < dest_bottom) {
+      uint8_t* scan_des =
+          pDeviceBitmap->GetWritableScanline(dest_row) + dest_ScanOffet;
+      uint32_t size = m_sizeX * dest_Bpp;
+      memmove(scan_des, scan_src, size);
+    }
+    return;
+  }
+  for (; dest_row_1 > dest_row; dest_row_1--) {
+    uint8_t* scan_des =
+        pDeviceBitmap->GetWritableScanline(dest_row_1) + dest_ScanOffet;
+    PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top);
+    const uint8_t* scan_src1 =
+        pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) +
+        dest_ScanOffet;
+    const uint8_t* scan_src2 =
+        pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) +
+        dest_ScanOffet;
+    for (int dest_col = 0; dest_col < m_sizeX; dest_col++) {
+      switch (pDeviceBitmap->GetFormat()) {
+        case FXDIB_Invalid:
+        case FXDIB_1bppMask:
+        case FXDIB_1bppRgb:
+          return;
+        case FXDIB_8bppMask:
+        case FXDIB_8bppRgb: {
+          if (pDeviceBitmap->GetPalette()) {
+            return;
+          }
+          int dest_g = 0;
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          *scan_des++ = (uint8_t)(dest_g >> 16);
+        } break;
+        case FXDIB_Rgb:
+        case FXDIB_Rgb32: {
+          uint32_t dest_b = 0;
+          uint32_t dest_g = 0;
+          uint32_t dest_r = 0;
+          dest_b += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_r += pWeight->m_Weights[0] * (*scan_src1++);
+          scan_src1 += dest_Bpp - 3;
+          dest_b += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_r += pWeight->m_Weights[1] * (*scan_src2++);
+          scan_src2 += dest_Bpp - 3;
+          *scan_des++ = (uint8_t)((dest_b) >> 16);
+          *scan_des++ = (uint8_t)((dest_g) >> 16);
+          *scan_des++ = (uint8_t)((dest_r) >> 16);
+          scan_des += dest_Bpp - 3;
+        } break;
+        case FXDIB_Argb: {
+          uint32_t dest_a = 0;
+          uint32_t dest_b = 0;
+          uint32_t dest_g = 0;
+          uint32_t dest_r = 0;
+          dest_b += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_r += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_a += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_b += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_r += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_a += pWeight->m_Weights[1] * (*scan_src2++);
+          *scan_des++ = (uint8_t)((dest_b) >> 16);
+          *scan_des++ = (uint8_t)((dest_g) >> 16);
+          *scan_des++ = (uint8_t)((dest_r) >> 16);
+          *scan_des++ = (uint8_t)((dest_a) >> 16);
+        } break;
+        default:
+          return;
+      }
+    }
+  }
+}
+
+bool CCodec_ProgressiveDecoder::BmpDetectImageType(CFX_DIBAttribute* pAttribute,
+                                                   uint32_t size) {
+  CCodec_BmpModule* pBmpModule = m_pCodecMgr->GetBmpModule();
+  if (!pBmpModule) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return false;
+  }
+
+  m_pBmpContext = pBmpModule->Start(this);
+  if (!m_pBmpContext) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return false;
+  }
+
+  if (!m_pFile->ReadBlock(m_pSrcBuf, 0, size)) {
+    m_status = FXCODEC_STATUS_ERR_READ;
+    return false;
+  }
+
+  m_offSet += size;
+  pBmpModule->Input(m_pBmpContext.get(), {m_pSrcBuf, size});
+  std::vector<uint32_t> palette;
+  int32_t readResult = pBmpModule->ReadHeader(
+      m_pBmpContext.get(), &m_SrcWidth, &m_SrcHeight, &m_BmpIsTopBottom,
+      &m_SrcComponents, &m_SrcPaletteNumber, &palette, pAttribute);
+  while (readResult == 2) {
+    FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_FORMAT;
+    if (!BmpReadMoreData(pBmpModule, error_status)) {
+      m_status = error_status;
+      return false;
+    }
+    readResult = pBmpModule->ReadHeader(
+        m_pBmpContext.get(), &m_SrcWidth, &m_SrcHeight, &m_BmpIsTopBottom,
+        &m_SrcComponents, &m_SrcPaletteNumber, &palette, pAttribute);
+  }
+
+  if (readResult != 1) {
+    m_pBmpContext.reset();
+    m_status = FXCODEC_STATUS_ERR_FORMAT;
+    return false;
+  }
+
+  FXDIB_Format format = FXDIB_Invalid;
+  switch (m_SrcComponents) {
+    case 1:
+      m_SrcFormat = FXCodec_8bppRgb;
+      format = FXDIB_8bppRgb;
+      break;
+    case 3:
+      m_SrcFormat = FXCodec_Rgb;
+      format = FXDIB_Rgb;
+      break;
+    case 4:
+      m_SrcFormat = FXCodec_Rgb32;
+      format = FXDIB_Rgb32;
+      break;
+    default:
+      m_pBmpContext.reset();
+      m_status = FXCODEC_STATUS_ERR_FORMAT;
+      return false;
+  }
+
+  uint32_t pitch = 0;
+  uint32_t neededData = 0;
+  if (!CFX_DIBitmap::CalculatePitchAndSize(m_SrcWidth, m_SrcHeight, format,
+                                           &pitch, &neededData)) {
+    m_pBmpContext.reset();
+    m_status = FXCODEC_STATUS_ERR_FORMAT;
+    return false;
+  }
+
+  uint32_t availableData = m_SrcSize > m_offSet ? m_SrcSize - m_offSet : 0;
+  if (neededData > availableData) {
+    m_pBmpContext.reset();
+    m_status = FXCODEC_STATUS_ERR_FORMAT;
+    return false;
+  }
+
+  m_SrcBPC = 8;
+  m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight);
+  FX_Free(m_pSrcPalette);
+  if (m_SrcPaletteNumber) {
+    m_pSrcPalette = FX_Alloc(FX_ARGB, m_SrcPaletteNumber);
+    memcpy(m_pSrcPalette, palette.data(), m_SrcPaletteNumber * sizeof(FX_ARGB));
+  } else {
+    m_pSrcPalette = nullptr;
+  }
+  return true;
+}
+
+bool CCodec_ProgressiveDecoder::BmpReadMoreData(CCodec_BmpModule* pBmpModule,
+                                                FXCODEC_STATUS& err_status) {
+  uint32_t dwSize = (uint32_t)m_pFile->GetSize();
+  if (dwSize <= m_offSet)
+    return false;
+
+  dwSize = dwSize - m_offSet;
+  FX_SAFE_UINT32 avail_input =
+      pBmpModule->GetAvailInput(m_pBmpContext.get(), nullptr);
+  if (!avail_input.IsValid())
+    return false;
+
+  uint32_t dwAvail = avail_input.ValueOrDie();
+  if (dwAvail == m_SrcSize) {
+    if (dwSize > FXCODEC_BLOCK_SIZE) {
+      dwSize = FXCODEC_BLOCK_SIZE;
+    }
+    m_SrcSize = (dwSize + dwAvail + FXCODEC_BLOCK_SIZE - 1) /
+                FXCODEC_BLOCK_SIZE * FXCODEC_BLOCK_SIZE;
+    m_pSrcBuf = FX_TryRealloc(uint8_t, m_pSrcBuf, m_SrcSize);
+    if (!m_pSrcBuf) {
+      err_status = FXCODEC_STATUS_ERR_MEMORY;
+      return false;
+    }
+  } else {
+    uint32_t dwConsume = m_SrcSize - dwAvail;
+    if (dwAvail) {
+      memmove(m_pSrcBuf, m_pSrcBuf + dwConsume, dwAvail);
+    }
+    if (dwSize > dwConsume) {
+      dwSize = dwConsume;
+    }
+  }
+  if (!m_pFile->ReadBlock(m_pSrcBuf + dwAvail, m_offSet, dwSize)) {
+    err_status = FXCODEC_STATUS_ERR_READ;
+    return false;
+  }
+  m_offSet += dwSize;
+  pBmpModule->Input(m_pBmpContext.get(), {m_pSrcBuf, dwSize + dwAvail});
+  return true;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::BmpStartDecode(
+    const RetainPtr<CFX_DIBitmap>& pDIBitmap) {
+  CCodec_BmpModule* pBmpModule = m_pCodecMgr->GetBmpModule();
+  if (!pBmpModule) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat);
+  m_ScanlineSize = (m_SrcWidth * m_SrcComponents + 3) / 4 * 4;
+  FX_Free(m_pDecodeBuf);
+  m_pDecodeBuf = FX_Alloc(uint8_t, m_ScanlineSize);
+  memset(m_pDecodeBuf, 0, m_ScanlineSize);
+  m_WeightHorz.Calc(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0,
+                    m_clipBox.Width());
+  m_WeightVert.Calc(m_sizeY, m_clipBox.Height());
+  m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+  return m_status;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::BmpContinueDecode() {
+  CCodec_BmpModule* pBmpModule = m_pCodecMgr->GetBmpModule();
+  if (!pBmpModule) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  while (true) {
+    int32_t readRes = pBmpModule->LoadImage(m_pBmpContext.get());
+    while (readRes == 2) {
+      FXCODEC_STATUS error_status = FXCODEC_STATUS_DECODE_FINISH;
+      if (!BmpReadMoreData(pBmpModule, error_status)) {
+        m_pDeviceBitmap = nullptr;
+        m_pFile = nullptr;
+        m_status = error_status;
+        return m_status;
+      }
+      readRes = pBmpModule->LoadImage(m_pBmpContext.get());
+    }
+    if (readRes == 1) {
+      m_pDeviceBitmap = nullptr;
+      m_pFile = nullptr;
+      m_status = FXCODEC_STATUS_DECODE_FINISH;
+      return m_status;
+    }
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERROR;
+    return m_status;
+  }
+}
+#endif  // PDF_ENABLE_XFA_BMP
+
+#ifdef PDF_ENABLE_XFA_GIF
+bool CCodec_ProgressiveDecoder::GifReadMoreData(CCodec_GifModule* pGifModule,
+                                                FXCODEC_STATUS& err_status) {
+  if (static_cast<uint32_t>(m_pFile->GetSize()) <= m_offSet)
+    return false;
+
+  uint32_t dwFileRemaining = m_pFile->GetSize() - m_offSet;
+  uint32_t dwUnusedBuffer =
+      !m_InvalidateGifBuffer
+          ? pGifModule->GetAvailInput(m_pGifContext.get(), nullptr)
+          : 0;
+  uint32_t dwAmountToFetchFromFile = dwFileRemaining;
+  if (dwUnusedBuffer == m_SrcSize) {
+    if (dwFileRemaining > FXCODEC_BLOCK_SIZE)
+      dwAmountToFetchFromFile = FXCODEC_BLOCK_SIZE;
+    m_SrcSize = std::min(
+        (dwAmountToFetchFromFile + dwUnusedBuffer + FXCODEC_BLOCK_SIZE - 1) /
+            FXCODEC_BLOCK_SIZE * FXCODEC_BLOCK_SIZE,
+        static_cast<uint32_t>(m_pFile->GetSize()));
+    m_pSrcBuf = FX_TryRealloc(uint8_t, m_pSrcBuf, m_SrcSize);
+    if (!m_pSrcBuf) {
+      err_status = FXCODEC_STATUS_ERR_MEMORY;
+      return false;
+    }
+  } else {
+    uint32_t dwConsumed = m_SrcSize - dwUnusedBuffer;
+    if (dwUnusedBuffer)
+      memmove(m_pSrcBuf, m_pSrcBuf + dwConsumed, dwUnusedBuffer);
+    if (dwFileRemaining > dwConsumed)
+      dwAmountToFetchFromFile = dwConsumed;
+  }
+
+  if (!m_pFile->ReadBlock(m_pSrcBuf + dwUnusedBuffer, m_offSet,
+                          dwAmountToFetchFromFile)) {
+    err_status = FXCODEC_STATUS_ERR_READ;
+    return false;
+  }
+
+  m_offSet += dwAmountToFetchFromFile;
+  pGifModule->Input(m_pGifContext.get(),
+                    {m_pSrcBuf, dwAmountToFetchFromFile + dwUnusedBuffer});
+  m_InvalidateGifBuffer = false;
+  return true;
+}
+
+bool CCodec_ProgressiveDecoder::GifDetectImageType(CFX_DIBAttribute* pAttribute,
+                                                   uint32_t size) {
+  CCodec_GifModule* pGifModule = m_pCodecMgr->GetGifModule();
+  if (!pGifModule) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return false;
+  }
+  m_pGifContext = pGifModule->Start(this);
+  bool bResult = m_pFile->ReadBlock(m_pSrcBuf, 0, size);
+  if (!bResult) {
+    m_status = FXCODEC_STATUS_ERR_READ;
+    return false;
+  }
+  m_offSet += size;
+  pGifModule->Input(m_pGifContext.get(), {m_pSrcBuf, size});
+  m_SrcComponents = 1;
+  CFX_GifDecodeStatus readResult = pGifModule->ReadHeader(
+      m_pGifContext.get(), &m_SrcWidth, &m_SrcHeight, &m_GifPltNumber,
+      &m_pGifPalette, &m_GifBgIndex, nullptr);
+  while (readResult == CFX_GifDecodeStatus::Unfinished) {
+    FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_FORMAT;
+    if (!GifReadMoreData(pGifModule, error_status)) {
+      m_pGifContext = nullptr;
+      m_status = error_status;
+      return false;
+    }
+    readResult = pGifModule->ReadHeader(m_pGifContext.get(), &m_SrcWidth,
+                                        &m_SrcHeight, &m_GifPltNumber,
+                                        &m_pGifPalette, &m_GifBgIndex, nullptr);
+  }
+  if (readResult == CFX_GifDecodeStatus::Success) {
+    m_SrcBPC = 8;
+    m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight);
+    return true;
+  }
+  m_pGifContext = nullptr;
+  m_status = FXCODEC_STATUS_ERR_FORMAT;
+  return false;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::GifStartDecode(
+    const RetainPtr<CFX_DIBitmap>& pDIBitmap) {
+  CCodec_GifModule* pGifModule = m_pCodecMgr->GetGifModule();
+  if (!pGifModule) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  m_SrcFormat = FXCodec_8bppRgb;
+  GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat);
+  int scanline_size = (m_SrcWidth + 3) / 4 * 4;
+  FX_Free(m_pDecodeBuf);
+  m_pDecodeBuf = FX_Alloc(uint8_t, scanline_size);
+  memset(m_pDecodeBuf, 0, scanline_size);
+  m_WeightHorz.Calc(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0,
+                    m_clipBox.Width());
+  m_WeightVert.Calc(m_sizeY, m_clipBox.Height());
+  m_FrameCur = 0;
+  m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+  return m_status;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::GifContinueDecode() {
+  CCodec_GifModule* pGifModule = m_pCodecMgr->GetGifModule();
+  if (!pGifModule) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+
+  CFX_GifDecodeStatus readRes =
+      pGifModule->LoadFrame(m_pGifContext.get(), m_FrameCur, nullptr);
+  while (readRes == CFX_GifDecodeStatus::Unfinished) {
+    FXCODEC_STATUS error_status = FXCODEC_STATUS_DECODE_FINISH;
+    if (!GifReadMoreData(pGifModule, error_status)) {
+      m_pDeviceBitmap = nullptr;
+      m_pFile = nullptr;
+      m_status = error_status;
+      return m_status;
+    }
+    readRes = pGifModule->LoadFrame(m_pGifContext.get(), m_FrameCur, nullptr);
+  }
+
+  if (readRes == CFX_GifDecodeStatus::Success) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_DECODE_FINISH;
+    return m_status;
+  }
+
+  m_pDeviceBitmap = nullptr;
+  m_pFile = nullptr;
+  m_status = FXCODEC_STATUS_ERROR;
+  return m_status;
+}
+
+void CCodec_ProgressiveDecoder::GifDoubleLineResampleVert(
+    const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
+    double scale_y,
+    int dest_row) {
+  int dest_Bpp = pDeviceBitmap->GetBPP() >> 3;
+  uint32_t dest_ScanOffet = m_startX * dest_Bpp;
+  int dest_top = m_startY;
+  pdfium::base::CheckedNumeric<double> scale_y2 = scale_y;
+  scale_y2 *= 2;
+  pdfium::base::CheckedNumeric<int> check_dest_row_1 = dest_row;
+  check_dest_row_1 -= scale_y2.ValueOrDie();
+  int dest_row_1 = check_dest_row_1.ValueOrDie();
+  dest_row_1 = std::max(dest_row_1, dest_top);
+  for (; dest_row_1 < dest_row; dest_row_1++) {
+    uint8_t* scan_des =
+        pDeviceBitmap->GetWritableScanline(dest_row_1) + dest_ScanOffet;
+    PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top);
+    const uint8_t* scan_src1 =
+        pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) +
+        dest_ScanOffet;
+    const uint8_t* scan_src2 =
+        pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) +
+        dest_ScanOffet;
+    for (int dest_col = 0; dest_col < m_sizeX; dest_col++) {
+      switch (pDeviceBitmap->GetFormat()) {
+        case FXDIB_Invalid:
+        case FXDIB_1bppMask:
+        case FXDIB_1bppRgb:
+          return;
+        case FXDIB_8bppMask:
+        case FXDIB_8bppRgb: {
+          if (pDeviceBitmap->GetPalette()) {
+            return;
+          }
+          int dest_g = 0;
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          *scan_des++ = (uint8_t)(dest_g >> 16);
+        } break;
+        case FXDIB_Rgb:
+        case FXDIB_Rgb32: {
+          uint32_t dest_b = 0;
+          uint32_t dest_g = 0;
+          uint32_t dest_r = 0;
+          dest_b += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_r += pWeight->m_Weights[0] * (*scan_src1++);
+          scan_src1 += dest_Bpp - 3;
+          dest_b += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_r += pWeight->m_Weights[1] * (*scan_src2++);
+          scan_src2 += dest_Bpp - 3;
+          *scan_des++ = (uint8_t)((dest_b) >> 16);
+          *scan_des++ = (uint8_t)((dest_g) >> 16);
+          *scan_des++ = (uint8_t)((dest_r) >> 16);
+          scan_des += dest_Bpp - 3;
+        } break;
+        case FXDIB_Argb: {
+          uint32_t dest_a = 0;
+          uint32_t dest_b = 0;
+          uint32_t dest_g = 0;
+          uint32_t dest_r = 0;
+          dest_b += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_r += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_a += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_b += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_r += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_a += pWeight->m_Weights[1] * (*scan_src2++);
+          *scan_des++ = (uint8_t)((dest_b) >> 16);
+          *scan_des++ = (uint8_t)((dest_g) >> 16);
+          *scan_des++ = (uint8_t)((dest_r) >> 16);
+          *scan_des++ = (uint8_t)((dest_a) >> 16);
+        } break;
+        default:
+          return;
+      }
+    }
+  }
+  int dest_bottom = dest_top + m_sizeY - 1;
+  if (dest_row + (int)(2 * scale_y) >= dest_bottom &&
+      dest_row + (int)scale_y < dest_bottom) {
+    GifDoubleLineResampleVert(pDeviceBitmap, scale_y, dest_row + (int)scale_y);
+  }
+}
+#endif  // PDF_ENABLE_XFA_GIF
+
+bool CCodec_ProgressiveDecoder::JpegReadMoreData(CCodec_JpegModule* pJpegModule,
+                                                 FXCODEC_STATUS& err_status) {
+  uint32_t dwSize = (uint32_t)m_pFile->GetSize();
+  if (dwSize <= m_offSet) {
+    return false;
+  }
+  dwSize = dwSize - m_offSet;
+  uint32_t dwAvail = pJpegModule->GetAvailInput(m_pJpegContext.get(), nullptr);
+  if (dwAvail == m_SrcSize) {
+    if (dwSize > FXCODEC_BLOCK_SIZE) {
+      dwSize = FXCODEC_BLOCK_SIZE;
+    }
+    m_SrcSize = (dwSize + dwAvail + FXCODEC_BLOCK_SIZE - 1) /
+                FXCODEC_BLOCK_SIZE * FXCODEC_BLOCK_SIZE;
+    m_pSrcBuf = FX_TryRealloc(uint8_t, m_pSrcBuf, m_SrcSize);
+    if (!m_pSrcBuf) {
+      err_status = FXCODEC_STATUS_ERR_MEMORY;
+      return false;
+    }
+  } else {
+    uint32_t dwConsume = m_SrcSize - dwAvail;
+    if (dwAvail) {
+      memmove(m_pSrcBuf, m_pSrcBuf + dwConsume, dwAvail);
+    }
+    if (dwSize > dwConsume) {
+      dwSize = dwConsume;
+    }
+  }
+  if (!m_pFile->ReadBlock(m_pSrcBuf + dwAvail, m_offSet, dwSize)) {
+    err_status = FXCODEC_STATUS_ERR_READ;
+    return false;
+  }
+  m_offSet += dwSize;
+  pJpegModule->Input(m_pJpegContext.get(), m_pSrcBuf, dwSize + dwAvail);
+  return true;
+}
+
+bool CCodec_ProgressiveDecoder::JpegDetectImageType(
+    CFX_DIBAttribute* pAttribute,
+    uint32_t size) {
+  CCodec_JpegModule* pJpegModule = m_pCodecMgr->GetJpegModule();
+  m_pJpegContext = pJpegModule->Start();
+  if (!m_pJpegContext) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return false;
+  }
+  if (!m_pFile->ReadBlock(m_pSrcBuf, 0, size)) {
+    m_status = FXCODEC_STATUS_ERR_READ;
+    return false;
+  }
+  m_offSet += size;
+  pJpegModule->Input(m_pJpegContext.get(), m_pSrcBuf, size);
+  // Setting jump marker before calling ReadHeader, since a longjmp to
+  // the marker indicates a fatal error.
+  if (setjmp(*m_pJpegContext->GetJumpMark()) == -1) {
+    m_pJpegContext.reset();
+    m_status = FXCODEC_STATUS_ERR_FORMAT;
+    return false;
+  }
+
+  int32_t readResult =
+      pJpegModule->ReadHeader(m_pJpegContext.get(), &m_SrcWidth, &m_SrcHeight,
+                              &m_SrcComponents, pAttribute);
+  while (readResult == 2) {
+    FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_FORMAT;
+    if (!JpegReadMoreData(pJpegModule, error_status)) {
+      m_status = error_status;
+      return false;
+    }
+    readResult =
+        pJpegModule->ReadHeader(m_pJpegContext.get(), &m_SrcWidth, &m_SrcHeight,
+                                &m_SrcComponents, pAttribute);
+  }
+  if (!readResult) {
+    m_SrcBPC = 8;
+    m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight);
+    return true;
+  }
+  m_pJpegContext.reset();
+  m_status = FXCODEC_STATUS_ERR_FORMAT;
+  return false;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::JpegStartDecode(
+    const RetainPtr<CFX_DIBitmap>& pDIBitmap) {
+  int down_scale = 1;
+  GetDownScale(down_scale);
+  // Setting jump marker before calling StartScanLine, since a longjmp to
+  // the marker indicates a fatal error.
+  if (setjmp(*m_pJpegContext->GetJumpMark()) == -1) {
+    m_pJpegContext.reset();
+    m_status = FXCODEC_STATUS_ERROR;
+    return FXCODEC_STATUS_ERROR;
+  }
+
+  CCodec_JpegModule* pJpegModule = m_pCodecMgr->GetJpegModule();
+  bool startStatus =
+      pJpegModule->StartScanline(m_pJpegContext.get(), down_scale);
+  while (!startStatus) {
+    FXCODEC_STATUS error_status = FXCODEC_STATUS_ERROR;
+    if (!JpegReadMoreData(pJpegModule, error_status)) {
+      m_pDeviceBitmap = nullptr;
+      m_pFile = nullptr;
+      m_status = error_status;
+      return m_status;
+    }
+
+    startStatus = pJpegModule->StartScanline(m_pJpegContext.get(), down_scale);
+  }
+  int scanline_size = (m_SrcWidth + down_scale - 1) / down_scale;
+  scanline_size = (scanline_size * m_SrcComponents + 3) / 4 * 4;
+  FX_Free(m_pDecodeBuf);
+  m_pDecodeBuf = FX_Alloc(uint8_t, scanline_size);
+  memset(m_pDecodeBuf, 0, scanline_size);
+  m_WeightHorz.Calc(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0,
+                    m_clipBox.Width());
+  m_WeightVert.Calc(m_sizeY, m_clipBox.Height());
+  switch (m_SrcComponents) {
+    case 1:
+      m_SrcFormat = FXCodec_8bppGray;
+      break;
+    case 3:
+      m_SrcFormat = FXCodec_Rgb;
+      break;
+    case 4:
+      m_SrcFormat = FXCodec_Cmyk;
+      break;
+  }
+  GetTransMethod(pDIBitmap->GetFormat(), m_SrcFormat);
+  m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+  return m_status;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::JpegContinueDecode() {
+  CCodec_JpegModule* pJpegModule = m_pCodecMgr->GetJpegModule();
+  // Setting jump marker before calling ReadScanLine, since a longjmp to
+  // the marker indicates a fatal error.
+  if (setjmp(*m_pJpegContext->GetJumpMark()) == -1) {
+    m_pJpegContext.reset();
+    m_status = FXCODEC_STATUS_ERROR;
+    return FXCODEC_STATUS_ERROR;
+  }
+
+  while (true) {
+    bool readRes =
+        pJpegModule->ReadScanline(m_pJpegContext.get(), m_pDecodeBuf);
+    while (!readRes) {
+      FXCODEC_STATUS error_status = FXCODEC_STATUS_DECODE_FINISH;
+      if (!JpegReadMoreData(pJpegModule, error_status)) {
+        m_pDeviceBitmap = nullptr;
+        m_pFile = nullptr;
+        m_status = error_status;
+        return m_status;
+      }
+      readRes = pJpegModule->ReadScanline(m_pJpegContext.get(), m_pDecodeBuf);
+    }
+    if (m_SrcFormat == FXCodec_Rgb) {
+      int src_Bpp = (m_SrcFormat & 0xff) >> 3;
+      RGB2BGR(m_pDecodeBuf + m_clipBox.left * src_Bpp, m_clipBox.Width());
+    }
+    if (m_SrcRow >= m_clipBox.bottom) {
+      m_pDeviceBitmap = nullptr;
+      m_pFile = nullptr;
+      m_status = FXCODEC_STATUS_DECODE_FINISH;
+      return m_status;
+    }
+    Resample(m_pDeviceBitmap, m_SrcRow, m_pDecodeBuf, m_SrcFormat);
+    m_SrcRow++;
+  }
+}
+
+#ifdef PDF_ENABLE_XFA_PNG
+void CCodec_ProgressiveDecoder::PngOneOneMapResampleHorz(
+    const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
+    int32_t dest_line,
+    uint8_t* src_scan,
+    FXCodec_Format src_format) {
+  uint8_t* dest_scan = pDeviceBitmap->GetWritableScanline(dest_line);
+  int32_t src_Bpp = (m_SrcFormat & 0xff) >> 3;
+  int32_t dest_Bpp = pDeviceBitmap->GetBPP() >> 3;
+  int32_t src_left = m_clipBox.left;
+  int32_t dest_left = m_startX;
+  src_scan += src_left * src_Bpp;
+  dest_scan += dest_left * dest_Bpp;
+  for (int32_t dest_col = 0; dest_col < m_sizeX; dest_col++) {
+    PixelWeight* pPixelWeights = m_WeightHorzOO.GetPixelWeight(dest_col);
+    switch (pDeviceBitmap->GetFormat()) {
+      case FXDIB_1bppMask:
+      case FXDIB_1bppRgb:
+        NOTREACHED();
+        return;
+      case FXDIB_8bppMask:
+      case FXDIB_8bppRgb: {
+        if (pDeviceBitmap->GetPalette()) {
+          return;
+        }
+        uint32_t dest_g = 0;
+        dest_g +=
+            pPixelWeights->m_Weights[0] * src_scan[pPixelWeights->m_SrcStart];
+        dest_g +=
+            pPixelWeights->m_Weights[1] * src_scan[pPixelWeights->m_SrcEnd];
+        *dest_scan++ = (uint8_t)(dest_g >> 16);
+      } break;
+      case FXDIB_Rgb:
+      case FXDIB_Rgb32: {
+        uint32_t dest_b = 0;
+        uint32_t dest_g = 0;
+        uint32_t dest_r = 0;
+        const uint8_t* p = src_scan;
+        p = src_scan + pPixelWeights->m_SrcStart * src_Bpp;
+        dest_b += pPixelWeights->m_Weights[0] * (*p++);
+        dest_g += pPixelWeights->m_Weights[0] * (*p++);
+        dest_r += pPixelWeights->m_Weights[0] * (*p);
+        p = src_scan + pPixelWeights->m_SrcEnd * src_Bpp;
+        dest_b += pPixelWeights->m_Weights[1] * (*p++);
+        dest_g += pPixelWeights->m_Weights[1] * (*p++);
+        dest_r += pPixelWeights->m_Weights[1] * (*p);
+        *dest_scan++ = (uint8_t)((dest_b) >> 16);
+        *dest_scan++ = (uint8_t)((dest_g) >> 16);
+        *dest_scan++ = (uint8_t)((dest_r) >> 16);
+        dest_scan += dest_Bpp - 3;
+      } break;
+      case FXDIB_Argb: {
+        uint32_t dest_a = 0;
+        uint32_t dest_b = 0;
+        uint32_t dest_g = 0;
+        uint32_t dest_r = 0;
+        const uint8_t* p = src_scan;
+        p = src_scan + pPixelWeights->m_SrcStart * src_Bpp;
+        dest_b += pPixelWeights->m_Weights[0] * (*p++);
+        dest_g += pPixelWeights->m_Weights[0] * (*p++);
+        dest_r += pPixelWeights->m_Weights[0] * (*p++);
+        dest_a += pPixelWeights->m_Weights[0] * (*p);
+        p = src_scan + pPixelWeights->m_SrcEnd * src_Bpp;
+        dest_b += pPixelWeights->m_Weights[1] * (*p++);
+        dest_g += pPixelWeights->m_Weights[1] * (*p++);
+        dest_r += pPixelWeights->m_Weights[1] * (*p++);
+        dest_a += pPixelWeights->m_Weights[1] * (*p);
+        *dest_scan++ = (uint8_t)((dest_b) >> 16);
+        *dest_scan++ = (uint8_t)((dest_g) >> 16);
+        *dest_scan++ = (uint8_t)((dest_r) >> 16);
+        *dest_scan++ = (uint8_t)((dest_a) >> 16);
+      } break;
+      default:
+        return;
+    }
+  }
+}
+
+bool CCodec_ProgressiveDecoder::PngDetectImageType(CFX_DIBAttribute* pAttribute,
+                                                   uint32_t size) {
+  CCodec_PngModule* pPngModule = m_pCodecMgr->GetPngModule();
+  if (!pPngModule) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return false;
+  }
+  m_pPngContext = pPngModule->Start(this);
+  if (!m_pPngContext) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return false;
+  }
+  bool bResult = m_pFile->ReadBlock(m_pSrcBuf, 0, size);
+  if (!bResult) {
+    m_status = FXCODEC_STATUS_ERR_READ;
+    return false;
+  }
+
+  m_offSet += size;
+  bResult = pPngModule->Input(m_pPngContext.get(), m_pSrcBuf, size, pAttribute);
+  while (bResult) {
+    uint32_t remain_size = static_cast<uint32_t>(m_pFile->GetSize()) - m_offSet;
+    uint32_t input_size =
+        remain_size > FXCODEC_BLOCK_SIZE ? FXCODEC_BLOCK_SIZE : remain_size;
+    if (input_size == 0) {
+      m_pPngContext.reset();
+      m_status = FXCODEC_STATUS_ERR_FORMAT;
+      return false;
+    }
+    if (m_pSrcBuf && input_size > m_SrcSize) {
+      FX_Free(m_pSrcBuf);
+      m_pSrcBuf = FX_Alloc(uint8_t, input_size);
+      memset(m_pSrcBuf, 0, input_size);
+      m_SrcSize = input_size;
+    }
+    bResult = m_pFile->ReadBlock(m_pSrcBuf, m_offSet, input_size);
+    if (!bResult) {
+      m_status = FXCODEC_STATUS_ERR_READ;
+      return false;
+    }
+    m_offSet += input_size;
+    bResult = pPngModule->Input(m_pPngContext.get(), m_pSrcBuf, input_size,
+                                pAttribute);
+  }
+  ASSERT(!bResult);
+  m_pPngContext.reset();
+  if (m_SrcPassNumber == 0) {
+    m_status = FXCODEC_STATUS_ERR_FORMAT;
+    return false;
+  }
+  return true;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::PngStartDecode(
+    const RetainPtr<CFX_DIBitmap>& pDIBitmap) {
+  CCodec_PngModule* pPngModule = m_pCodecMgr->GetPngModule();
+  if (!pPngModule) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  m_pPngContext = pPngModule->Start(this);
+  if (!m_pPngContext) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  m_offSet = 0;
+  switch (m_pDeviceBitmap->GetFormat()) {
+    case FXDIB_8bppMask:
+    case FXDIB_8bppRgb:
+      m_SrcComponents = 1;
+      m_SrcFormat = FXCodec_8bppGray;
+      break;
+    case FXDIB_Rgb:
+      m_SrcComponents = 3;
+      m_SrcFormat = FXCodec_Rgb;
+      break;
+    case FXDIB_Rgb32:
+    case FXDIB_Argb:
+      m_SrcComponents = 4;
+      m_SrcFormat = FXCodec_Argb;
+      break;
+    default: {
+      m_pDeviceBitmap = nullptr;
+      m_pFile = nullptr;
+      m_status = FXCODEC_STATUS_ERR_PARAMS;
+      return m_status;
+    }
+  }
+  GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat);
+  int scanline_size = (m_SrcWidth * m_SrcComponents + 3) / 4 * 4;
+  FX_Free(m_pDecodeBuf);
+  m_pDecodeBuf = FX_Alloc(uint8_t, scanline_size);
+  memset(m_pDecodeBuf, 0, scanline_size);
+  m_WeightHorzOO.Calc(m_sizeX, m_clipBox.Width());
+  m_WeightVert.Calc(m_sizeY, m_clipBox.Height());
+  m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+  return m_status;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::PngContinueDecode() {
+  CCodec_PngModule* pPngModule = m_pCodecMgr->GetPngModule();
+  if (!pPngModule) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  while (true) {
+    uint32_t remain_size = (uint32_t)m_pFile->GetSize() - m_offSet;
+    uint32_t input_size =
+        remain_size > FXCODEC_BLOCK_SIZE ? FXCODEC_BLOCK_SIZE : remain_size;
+    if (input_size == 0) {
+      m_pPngContext.reset();
+      m_pDeviceBitmap = nullptr;
+      m_pFile = nullptr;
+      m_status = FXCODEC_STATUS_DECODE_FINISH;
+      return m_status;
+    }
+    if (m_pSrcBuf && input_size > m_SrcSize) {
+      FX_Free(m_pSrcBuf);
+      m_pSrcBuf = FX_Alloc(uint8_t, input_size);
+      memset(m_pSrcBuf, 0, input_size);
+      m_SrcSize = input_size;
+    }
+    bool bResult = m_pFile->ReadBlock(m_pSrcBuf, m_offSet, input_size);
+    if (!bResult) {
+      m_pDeviceBitmap = nullptr;
+      m_pFile = nullptr;
+      m_status = FXCODEC_STATUS_ERR_READ;
+      return m_status;
+    }
+    m_offSet += input_size;
+    bResult =
+        pPngModule->Input(m_pPngContext.get(), m_pSrcBuf, input_size, nullptr);
+    if (!bResult) {
+      m_pDeviceBitmap = nullptr;
+      m_pFile = nullptr;
+      m_status = FXCODEC_STATUS_ERROR;
+      return m_status;
+    }
+  }
+}
+#endif  // PDF_ENABLE_XFA_PNG
+
+#ifdef PDF_ENABLE_XFA_TIFF
+bool CCodec_ProgressiveDecoder::TiffDetectImageType(
+    CFX_DIBAttribute* pAttribute,
+    uint32_t size) {
+  CCodec_TiffModule* pTiffModule = m_pCodecMgr->GetTiffModule();
+  if (!pTiffModule) {
+    m_status = FXCODEC_STATUS_ERR_FORMAT;
+    return false;
+  }
+  m_pTiffContext = pTiffModule->CreateDecoder(m_pFile);
+  if (!m_pTiffContext) {
+    m_status = FXCODEC_STATUS_ERR_FORMAT;
+    return false;
+  }
+  int32_t dummy_bpc;
+  bool ret = pTiffModule->LoadFrameInfo(m_pTiffContext.get(), 0, &m_SrcWidth,
+                                        &m_SrcHeight, &m_SrcComponents,
+                                        &dummy_bpc, pAttribute);
+  m_SrcComponents = 4;
+  m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight);
+  if (!ret) {
+    m_pTiffContext.reset();
+    m_status = FXCODEC_STATUS_ERR_FORMAT;
+    return false;
+  }
+  return true;
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::TiffContinueDecode() {
+  CCodec_TiffModule* pTiffModule = m_pCodecMgr->GetTiffModule();
+  if (!pTiffModule) {
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  bool ret = false;
+  if (m_pDeviceBitmap->GetBPP() == 32 &&
+      m_pDeviceBitmap->GetWidth() == m_SrcWidth && m_SrcWidth == m_sizeX &&
+      m_pDeviceBitmap->GetHeight() == m_SrcHeight && m_SrcHeight == m_sizeY &&
+      m_startX == 0 && m_startY == 0 && m_clipBox.left == 0 &&
+      m_clipBox.top == 0 && m_clipBox.right == m_SrcWidth &&
+      m_clipBox.bottom == m_SrcHeight) {
+    ret = pTiffModule->Decode(m_pTiffContext.get(), m_pDeviceBitmap);
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    if (!ret) {
+      m_status = FXCODEC_STATUS_ERROR;
+      return m_status;
+    }
+    m_status = FXCODEC_STATUS_DECODE_FINISH;
+    return m_status;
+  }
+
+  auto pDIBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+  pDIBitmap->Create(m_SrcWidth, m_SrcHeight, FXDIB_Argb);
+  if (!pDIBitmap->GetBuffer()) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  ret = pTiffModule->Decode(m_pTiffContext.get(), pDIBitmap);
+  if (!ret) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERROR;
+    return m_status;
+  }
+  RetainPtr<CFX_DIBitmap> pClipBitmap =
+      (m_clipBox.left == 0 && m_clipBox.top == 0 &&
+       m_clipBox.right == m_SrcWidth && m_clipBox.bottom == m_SrcHeight)
+          ? pDIBitmap
+          : pDIBitmap->Clone(&m_clipBox);
+  if (!pClipBitmap) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  RetainPtr<CFX_DIBitmap> pFormatBitmap;
+  switch (m_pDeviceBitmap->GetFormat()) {
+    case FXDIB_8bppRgb:
+      pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+      pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(),
+                            FXDIB_8bppRgb);
+      break;
+    case FXDIB_8bppMask:
+      pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+      pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(),
+                            FXDIB_8bppMask);
+      break;
+    case FXDIB_Rgb:
+      pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+      pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(),
+                            FXDIB_Rgb);
+      break;
+    case FXDIB_Rgb32:
+      pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+      pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(),
+                            FXDIB_Rgb32);
+      break;
+    case FXDIB_Argb:
+      pFormatBitmap = pClipBitmap;
+      break;
+    default:
+      break;
+  }
+  switch (m_pDeviceBitmap->GetFormat()) {
+    case FXDIB_8bppRgb:
+    case FXDIB_8bppMask: {
+      for (int32_t row = 0; row < pClipBitmap->GetHeight(); row++) {
+        const uint8_t* src_line = pClipBitmap->GetScanline(row);
+        uint8_t* dest_line = pFormatBitmap->GetWritableScanline(row);
+        for (int32_t col = 0; col < pClipBitmap->GetWidth(); col++) {
+          uint8_t _a = 255 - src_line[3];
+          uint8_t b = (src_line[0] * src_line[3] + 0xFF * _a) / 255;
+          uint8_t g = (src_line[1] * src_line[3] + 0xFF * _a) / 255;
+          uint8_t r = (src_line[2] * src_line[3] + 0xFF * _a) / 255;
+          *dest_line++ = FXRGB2GRAY(r, g, b);
+          src_line += 4;
+        }
+      }
+    } break;
+    case FXDIB_Rgb:
+    case FXDIB_Rgb32: {
+      int32_t desBpp = (m_pDeviceBitmap->GetFormat() == FXDIB_Rgb) ? 3 : 4;
+      for (int32_t row = 0; row < pClipBitmap->GetHeight(); row++) {
+        const uint8_t* src_line = pClipBitmap->GetScanline(row);
+        uint8_t* dest_line = pFormatBitmap->GetWritableScanline(row);
+        for (int32_t col = 0; col < pClipBitmap->GetWidth(); col++) {
+          uint8_t _a = 255 - src_line[3];
+          uint8_t b = (src_line[0] * src_line[3] + 0xFF * _a) / 255;
+          uint8_t g = (src_line[1] * src_line[3] + 0xFF * _a) / 255;
+          uint8_t r = (src_line[2] * src_line[3] + 0xFF * _a) / 255;
+          *dest_line++ = b;
+          *dest_line++ = g;
+          *dest_line++ = r;
+          dest_line += desBpp - 3;
+          src_line += 4;
+        }
+      }
+    } break;
+    default:
+      break;
+  }
+  if (!pFormatBitmap) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  RetainPtr<CFX_DIBitmap> pStrechBitmap =
+      pFormatBitmap->StretchTo(m_sizeX, m_sizeY, FXDIB_INTERPOL, nullptr);
+  pFormatBitmap = nullptr;
+  if (!pStrechBitmap) {
+    m_pDeviceBitmap = nullptr;
+    m_pFile = nullptr;
+    m_status = FXCODEC_STATUS_ERR_MEMORY;
+    return m_status;
+  }
+  m_pDeviceBitmap->TransferBitmap(m_startX, m_startY, m_sizeX, m_sizeY,
+                                  pStrechBitmap, 0, 0);
+  m_pDeviceBitmap = nullptr;
+  m_pFile = nullptr;
+  m_status = FXCODEC_STATUS_DECODE_FINISH;
+  return m_status;
+}
+#endif  // PDF_ENABLE_XFA_TIFF
+
+bool CCodec_ProgressiveDecoder::DetectImageType(FXCODEC_IMAGE_TYPE imageType,
+                                                CFX_DIBAttribute* pAttribute) {
+  m_offSet = 0;
+  uint32_t size = (uint32_t)m_pFile->GetSize();
+  if (size > FXCODEC_BLOCK_SIZE) {
+    size = FXCODEC_BLOCK_SIZE;
+  }
+  FX_Free(m_pSrcBuf);
+  m_pSrcBuf = FX_Alloc(uint8_t, size);
+  memset(m_pSrcBuf, 0, size);
+  m_SrcSize = size;
+  switch (imageType) {
+    case FXCODEC_IMAGE_JPG:
+      return JpegDetectImageType(pAttribute, size);
+#ifdef PDF_ENABLE_XFA_BMP
+    case FXCODEC_IMAGE_BMP:
+      return BmpDetectImageType(pAttribute, size);
+#endif  // PDF_ENABLE_XFA_BMP
+#ifdef PDF_ENABLE_XFA_GIF
+    case FXCODEC_IMAGE_GIF:
+      return GifDetectImageType(pAttribute, size);
+#endif  // PDF_ENABLE_XFA_GIF
+#ifdef PDF_ENABLE_XFA_PNG
+    case FXCODEC_IMAGE_PNG:
+      return PngDetectImageType(pAttribute, size);
+#endif  // PDF_ENABLE_XFA_PNG
+#ifdef PDF_ENABLE_XFA_TIFF
+    case FXCODEC_IMAGE_TIFF:
+      return TiffDetectImageType(pAttribute, size);
+#endif  // PDF_ENABLE_XFA_TIFF
+    default:
+      m_status = FXCODEC_STATUS_ERR_FORMAT;
+      return false;
+  }
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::LoadImageInfo(
+    const RetainPtr<IFX_SeekableReadStream>& pFile,
+    FXCODEC_IMAGE_TYPE imageType,
+    CFX_DIBAttribute* pAttribute,
+    bool bSkipImageTypeCheck) {
+  switch (m_status) {
+    case FXCODEC_STATUS_FRAME_READY:
+    case FXCODEC_STATUS_FRAME_TOBECONTINUE:
+    case FXCODEC_STATUS_DECODE_READY:
+    case FXCODEC_STATUS_DECODE_TOBECONTINUE:
+      return FXCODEC_STATUS_ERROR;
+    default:
+      break;
+  }
+  if (!pFile) {
+    m_status = FXCODEC_STATUS_ERR_PARAMS;
+    m_pFile = nullptr;
+    return m_status;
+  }
+  m_pFile = pFile;
+  m_offSet = 0;
+  m_SrcWidth = m_SrcHeight = 0;
+  m_SrcComponents = m_SrcBPC = 0;
+  m_clipBox = FX_RECT(0, 0, 0, 0);
+  m_startX = m_startY = 0;
+  m_sizeX = m_sizeY = 0;
+  m_SrcPassNumber = 0;
+  if (imageType != FXCODEC_IMAGE_UNKNOWN &&
+      DetectImageType(imageType, pAttribute)) {
+    m_imageType = imageType;
+    m_status = FXCODEC_STATUS_FRAME_READY;
+    return m_status;
+  }
+  // If we got here then the image data does not match the requested decoder.
+  // If we're skipping the type check then bail out at this point and return
+  // the failed status.
+  if (bSkipImageTypeCheck)
+    return m_status;
+
+  for (int type = FXCODEC_IMAGE_UNKNOWN + 1; type < FXCODEC_IMAGE_MAX; type++) {
+    if (DetectImageType(static_cast<FXCODEC_IMAGE_TYPE>(type), pAttribute)) {
+      m_imageType = static_cast<FXCODEC_IMAGE_TYPE>(type);
+      m_status = FXCODEC_STATUS_FRAME_READY;
+      return m_status;
+    }
+  }
+  m_status = FXCODEC_STATUS_ERR_FORMAT;
+  m_pFile = nullptr;
+  return m_status;
+}
+
+void CCodec_ProgressiveDecoder::SetClipBox(FX_RECT* clip) {
+  if (m_status != FXCODEC_STATUS_FRAME_READY)
+    return;
+
+  if (clip->IsEmpty()) {
+    m_clipBox = FX_RECT(0, 0, 0, 0);
+    return;
+  }
+  clip->left = std::max(clip->left, 0);
+  clip->right = std::min(clip->right, m_SrcWidth);
+  clip->top = std::max(clip->top, 0);
+  clip->bottom = std::min(clip->bottom, m_SrcHeight);
+  if (clip->IsEmpty()) {
+    m_clipBox = FX_RECT(0, 0, 0, 0);
+    return;
+  }
+  m_clipBox = *clip;
+}
+
+void CCodec_ProgressiveDecoder::GetDownScale(int& down_scale) {
+  down_scale = 1;
+  int ratio_w = m_clipBox.Width() / m_sizeX;
+  int ratio_h = m_clipBox.Height() / m_sizeY;
+  int ratio = (ratio_w > ratio_h) ? ratio_h : ratio_w;
+  if (ratio >= 8) {
+    down_scale = 8;
+  } else if (ratio >= 4) {
+    down_scale = 4;
+  } else if (ratio >= 2) {
+    down_scale = 2;
+  }
+  m_clipBox.left /= down_scale;
+  m_clipBox.right /= down_scale;
+  m_clipBox.top /= down_scale;
+  m_clipBox.bottom /= down_scale;
+  if (m_clipBox.right == m_clipBox.left) {
+    m_clipBox.right = m_clipBox.left + 1;
+  }
+  if (m_clipBox.bottom == m_clipBox.top) {
+    m_clipBox.bottom = m_clipBox.top + 1;
+  }
+}
+
+void CCodec_ProgressiveDecoder::GetTransMethod(FXDIB_Format dest_format,
+                                               FXCodec_Format src_format) {
+  switch (dest_format) {
+    case FXDIB_1bppMask:
+    case FXDIB_1bppRgb: {
+      switch (src_format) {
+        case FXCodec_1bppGray:
+          m_TransMethod = 0;
+          break;
+        default:
+          m_TransMethod = -1;
+      }
+    } break;
+    case FXDIB_8bppMask:
+    case FXDIB_8bppRgb: {
+      switch (src_format) {
+        case FXCodec_1bppGray:
+          m_TransMethod = 1;
+          break;
+        case FXCodec_8bppGray:
+          m_TransMethod = 2;
+          break;
+        case FXCodec_1bppRgb:
+        case FXCodec_8bppRgb:
+          m_TransMethod = 3;
+          break;
+        case FXCodec_Rgb:
+        case FXCodec_Rgb32:
+        case FXCodec_Argb:
+          m_TransMethod = 4;
+          break;
+        case FXCodec_Cmyk:
+          m_TransMethod = 5;
+          break;
+        default:
+          m_TransMethod = -1;
+      }
+    } break;
+    case FXDIB_Rgb: {
+      switch (src_format) {
+        case FXCodec_1bppGray:
+          m_TransMethod = 6;
+          break;
+        case FXCodec_8bppGray:
+          m_TransMethod = 7;
+          break;
+        case FXCodec_1bppRgb:
+        case FXCodec_8bppRgb:
+          m_TransMethod = 8;
+          break;
+        case FXCodec_Rgb:
+        case FXCodec_Rgb32:
+        case FXCodec_Argb:
+          m_TransMethod = 9;
+          break;
+        case FXCodec_Cmyk:
+          m_TransMethod = 10;
+          break;
+        default:
+          m_TransMethod = -1;
+      }
+    } break;
+    case FXDIB_Rgb32:
+    case FXDIB_Argb: {
+      switch (src_format) {
+        case FXCodec_1bppGray:
+          m_TransMethod = 6;
+          break;
+        case FXCodec_8bppGray:
+          m_TransMethod = 7;
+          break;
+        case FXCodec_1bppRgb:
+        case FXCodec_8bppRgb:
+          if (dest_format == FXDIB_Argb) {
+            m_TransMethod = 12;
+          } else {
+            m_TransMethod = 8;
+          }
+          break;
+        case FXCodec_Rgb:
+        case FXCodec_Rgb32:
+          m_TransMethod = 9;
+          break;
+        case FXCodec_Cmyk:
+          m_TransMethod = 10;
+          break;
+        case FXCodec_Argb:
+          m_TransMethod = 11;
+          break;
+        default:
+          m_TransMethod = -1;
+      }
+    } break;
+    default:
+      m_TransMethod = -1;
+  }
+}
+
+void CCodec_ProgressiveDecoder::ReSampleScanline(
+    const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
+    int dest_line,
+    uint8_t* src_scan,
+    FXCodec_Format src_format) {
+  int src_left = m_clipBox.left;
+  int dest_left = m_startX;
+  uint8_t* dest_scan =
+      pDeviceBitmap->GetBuffer() + dest_line * pDeviceBitmap->GetPitch();
+  int src_bytes_per_pixel = (src_format & 0xff) / 8;
+  int dest_bytes_per_pixel = pDeviceBitmap->GetBPP() / 8;
+  src_scan += src_left * src_bytes_per_pixel;
+  dest_scan += dest_left * dest_bytes_per_pixel;
+  for (int dest_col = 0; dest_col < m_sizeX; dest_col++) {
+    PixelWeight* pPixelWeights = m_WeightHorz.GetPixelWeight(dest_col);
+    switch (m_TransMethod) {
+      case -1:
+        return;
+      case 0:
+        return;
+      case 1:
+        return;
+      case 2: {
+        uint32_t dest_g = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          dest_g += pixel_weight * src_scan[j];
+        }
+        *dest_scan++ = (uint8_t)(dest_g >> 16);
+      } break;
+      case 3: {
+        int dest_r = 0;
+        int dest_g = 0;
+        int dest_b = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          unsigned long argb = m_pSrcPalette[src_scan[j]];
+          dest_r += pixel_weight * (uint8_t)(argb >> 16);
+          dest_g += pixel_weight * (uint8_t)(argb >> 8);
+          dest_b += pixel_weight * (uint8_t)argb;
+        }
+        *dest_scan++ =
+            (uint8_t)FXRGB2GRAY((dest_r >> 16), (dest_g >> 16), (dest_b >> 16));
+      } break;
+      case 4: {
+        uint32_t dest_b = 0;
+        uint32_t dest_g = 0;
+        uint32_t dest_r = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
+          dest_b += pixel_weight * (*src_pixel++);
+          dest_g += pixel_weight * (*src_pixel++);
+          dest_r += pixel_weight * (*src_pixel);
+        }
+        *dest_scan++ =
+            (uint8_t)FXRGB2GRAY((dest_r >> 16), (dest_g >> 16), (dest_b >> 16));
+      } break;
+      case 5: {
+        uint32_t dest_b = 0;
+        uint32_t dest_g = 0;
+        uint32_t dest_r = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
+          uint8_t src_b = 0;
+          uint8_t src_g = 0;
+          uint8_t src_r = 0;
+          std::tie(src_r, src_g, src_b) =
+              AdobeCMYK_to_sRGB1(255 - src_pixel[0], 255 - src_pixel[1],
+                                 255 - src_pixel[2], 255 - src_pixel[3]);
+          dest_b += pixel_weight * src_b;
+          dest_g += pixel_weight * src_g;
+          dest_r += pixel_weight * src_r;
+        }
+        *dest_scan++ =
+            (uint8_t)FXRGB2GRAY((dest_r >> 16), (dest_g >> 16), (dest_b >> 16));
+      } break;
+      case 6:
+        return;
+      case 7: {
+        uint32_t dest_g = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          dest_g += pixel_weight * src_scan[j];
+        }
+        memset(dest_scan, (uint8_t)(dest_g >> 16), 3);
+        dest_scan += dest_bytes_per_pixel;
+      } break;
+      case 8: {
+        int dest_r = 0;
+        int dest_g = 0;
+        int dest_b = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          unsigned long argb = m_pSrcPalette[src_scan[j]];
+          dest_r += pixel_weight * (uint8_t)(argb >> 16);
+          dest_g += pixel_weight * (uint8_t)(argb >> 8);
+          dest_b += pixel_weight * (uint8_t)argb;
+        }
+        *dest_scan++ = (uint8_t)((dest_b) >> 16);
+        *dest_scan++ = (uint8_t)((dest_g) >> 16);
+        *dest_scan++ = (uint8_t)((dest_r) >> 16);
+        dest_scan += dest_bytes_per_pixel - 3;
+      } break;
+      case 12: {
+#ifdef PDF_ENABLE_XFA_BMP
+        if (m_pBmpContext) {
+          int dest_r = 0;
+          int dest_g = 0;
+          int dest_b = 0;
+          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+               j++) {
+            int pixel_weight =
+                pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+            unsigned long argb = m_pSrcPalette[src_scan[j]];
+            dest_r += pixel_weight * (uint8_t)(argb >> 16);
+            dest_g += pixel_weight * (uint8_t)(argb >> 8);
+            dest_b += pixel_weight * (uint8_t)argb;
+          }
+          *dest_scan++ = (uint8_t)((dest_b) >> 16);
+          *dest_scan++ = (uint8_t)((dest_g) >> 16);
+          *dest_scan++ = (uint8_t)((dest_r) >> 16);
+          *dest_scan++ = 0xFF;
+          break;
+        }
+#endif  // PDF_ENABLE_XFA_BMP
+        int dest_a = 0;
+        int dest_r = 0;
+        int dest_g = 0;
+        int dest_b = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          unsigned long argb = m_pSrcPalette[src_scan[j]];
+          dest_a += pixel_weight * (uint8_t)(argb >> 24);
+          dest_r += pixel_weight * (uint8_t)(argb >> 16);
+          dest_g += pixel_weight * (uint8_t)(argb >> 8);
+          dest_b += pixel_weight * (uint8_t)argb;
+        }
+        *dest_scan++ = (uint8_t)((dest_b) >> 16);
+        *dest_scan++ = (uint8_t)((dest_g) >> 16);
+        *dest_scan++ = (uint8_t)((dest_r) >> 16);
+        *dest_scan++ = (uint8_t)((dest_a) >> 16);
+      } break;
+      case 9: {
+        uint32_t dest_b = 0;
+        uint32_t dest_g = 0;
+        uint32_t dest_r = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
+          dest_b += pixel_weight * (*src_pixel++);
+          dest_g += pixel_weight * (*src_pixel++);
+          dest_r += pixel_weight * (*src_pixel);
+        }
+        *dest_scan++ = (uint8_t)((dest_b) >> 16);
+        *dest_scan++ = (uint8_t)((dest_g) >> 16);
+        *dest_scan++ = (uint8_t)((dest_r) >> 16);
+        dest_scan += dest_bytes_per_pixel - 3;
+      } break;
+      case 10: {
+        uint32_t dest_b = 0;
+        uint32_t dest_g = 0;
+        uint32_t dest_r = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
+          uint8_t src_b = 0;
+          uint8_t src_g = 0;
+          uint8_t src_r = 0;
+          std::tie(src_r, src_g, src_b) =
+              AdobeCMYK_to_sRGB1(255 - src_pixel[0], 255 - src_pixel[1],
+                                 255 - src_pixel[2], 255 - src_pixel[3]);
+          dest_b += pixel_weight * src_b;
+          dest_g += pixel_weight * src_g;
+          dest_r += pixel_weight * src_r;
+        }
+        *dest_scan++ = (uint8_t)((dest_b) >> 16);
+        *dest_scan++ = (uint8_t)((dest_g) >> 16);
+        *dest_scan++ = (uint8_t)((dest_r) >> 16);
+        dest_scan += dest_bytes_per_pixel - 3;
+      } break;
+      case 11: {
+        uint32_t dest_alpha = 0;
+        uint32_t dest_r = 0;
+        uint32_t dest_g = 0;
+        uint32_t dest_b = 0;
+        for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
+             j++) {
+          int pixel_weight =
+              pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+          const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
+          pixel_weight = pixel_weight * src_pixel[3] / 255;
+          dest_b += pixel_weight * (*src_pixel++);
+          dest_g += pixel_weight * (*src_pixel++);
+          dest_r += pixel_weight * (*src_pixel);
+          dest_alpha += pixel_weight;
+        }
+        *dest_scan++ = (uint8_t)((dest_b) >> 16);
+        *dest_scan++ = (uint8_t)((dest_g) >> 16);
+        *dest_scan++ = (uint8_t)((dest_r) >> 16);
+        *dest_scan++ = (uint8_t)((dest_alpha * 255) >> 16);
+      } break;
+      default:
+        return;
+    }
+  }
+}
+
+void CCodec_ProgressiveDecoder::ResampleVert(
+    const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
+    double scale_y,
+    int dest_row) {
+  int dest_Bpp = pDeviceBitmap->GetBPP() >> 3;
+  uint32_t dest_ScanOffet = m_startX * dest_Bpp;
+  int dest_top = m_startY;
+  pdfium::base::CheckedNumeric<int> check_dest_row_1 = dest_row;
+  check_dest_row_1 -= pdfium::base::checked_cast<int>(scale_y);
+  int dest_row_1 = check_dest_row_1.ValueOrDie();
+  if (dest_row_1 < dest_top) {
+    int dest_bottom = dest_top + m_sizeY;
+    if (dest_row + (int)scale_y >= dest_bottom - 1) {
+      const uint8_t* scan_src =
+          pDeviceBitmap->GetScanline(dest_row) + dest_ScanOffet;
+      while (++dest_row < dest_bottom) {
+        uint8_t* scan_des =
+            pDeviceBitmap->GetWritableScanline(dest_row) + dest_ScanOffet;
+        uint32_t size = m_sizeX * dest_Bpp;
+        memmove(scan_des, scan_src, size);
+      }
+    }
+    return;
+  }
+  for (; dest_row_1 < dest_row; dest_row_1++) {
+    uint8_t* scan_des =
+        pDeviceBitmap->GetWritableScanline(dest_row_1) + dest_ScanOffet;
+    PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top);
+    const uint8_t* scan_src1 =
+        pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) +
+        dest_ScanOffet;
+    const uint8_t* scan_src2 =
+        pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) +
+        dest_ScanOffet;
+    for (int dest_col = 0; dest_col < m_sizeX; dest_col++) {
+      switch (pDeviceBitmap->GetFormat()) {
+        case FXDIB_Invalid:
+        case FXDIB_1bppMask:
+        case FXDIB_1bppRgb:
+          return;
+        case FXDIB_8bppMask:
+        case FXDIB_8bppRgb: {
+          if (pDeviceBitmap->GetPalette()) {
+            return;
+          }
+          int dest_g = 0;
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          *scan_des++ = (uint8_t)(dest_g >> 16);
+        } break;
+        case FXDIB_Rgb:
+        case FXDIB_Rgb32: {
+          uint32_t dest_b = 0;
+          uint32_t dest_g = 0;
+          uint32_t dest_r = 0;
+          dest_b += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_r += pWeight->m_Weights[0] * (*scan_src1++);
+          scan_src1 += dest_Bpp - 3;
+          dest_b += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_r += pWeight->m_Weights[1] * (*scan_src2++);
+          scan_src2 += dest_Bpp - 3;
+          *scan_des++ = (uint8_t)((dest_b) >> 16);
+          *scan_des++ = (uint8_t)((dest_g) >> 16);
+          *scan_des++ = (uint8_t)((dest_r) >> 16);
+          scan_des += dest_Bpp - 3;
+        } break;
+        case FXDIB_Argb: {
+          uint32_t dest_a = 0;
+          uint32_t dest_b = 0;
+          uint32_t dest_g = 0;
+          uint32_t dest_r = 0;
+          dest_b += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_g += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_r += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_a += pWeight->m_Weights[0] * (*scan_src1++);
+          dest_b += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_g += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_r += pWeight->m_Weights[1] * (*scan_src2++);
+          dest_a += pWeight->m_Weights[1] * (*scan_src2++);
+          *scan_des++ = (uint8_t)((dest_b) >> 16);
+          *scan_des++ = (uint8_t)((dest_g) >> 16);
+          *scan_des++ = (uint8_t)((dest_r) >> 16);
+          *scan_des++ = (uint8_t)((dest_a) >> 16);
+        } break;
+        default:
+          return;
+      }
+    }
+  }
+  int dest_bottom = dest_top + m_sizeY;
+  if (dest_row + (int)scale_y >= dest_bottom - 1) {
+    const uint8_t* scan_src =
+        pDeviceBitmap->GetScanline(dest_row) + dest_ScanOffet;
+    while (++dest_row < dest_bottom) {
+      uint8_t* scan_des =
+          pDeviceBitmap->GetWritableScanline(dest_row) + dest_ScanOffet;
+      uint32_t size = m_sizeX * dest_Bpp;
+      memmove(scan_des, scan_src, size);
+    }
+  }
+}
+
+void CCodec_ProgressiveDecoder::Resample(
+    const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
+    int32_t src_line,
+    uint8_t* src_scan,
+    FXCodec_Format src_format) {
+  int src_top = m_clipBox.top;
+  int dest_top = m_startY;
+  int src_height = m_clipBox.Height();
+  int dest_height = m_sizeY;
+  if (src_line >= src_top) {
+    double scale_y = static_cast<double>(dest_height) / src_height;
+    int src_row = src_line - src_top;
+    int dest_row = (int)(src_row * scale_y) + dest_top;
+    if (dest_row >= dest_top + dest_height) {
+      return;
+    }
+    ReSampleScanline(pDeviceBitmap, dest_row, m_pDecodeBuf, src_format);
+    if (scale_y > 1.0) {
+      ResampleVert(pDeviceBitmap, scale_y, dest_row);
+    }
+  }
+}
+
+std::pair<FXCODEC_STATUS, size_t> CCodec_ProgressiveDecoder::GetFrames() {
+  if (!(m_status == FXCODEC_STATUS_FRAME_READY ||
+        m_status == FXCODEC_STATUS_FRAME_TOBECONTINUE)) {
+    return {FXCODEC_STATUS_ERROR, 0};
+  }
+
+  switch (m_imageType) {
+#ifdef PDF_ENABLE_XFA_BMP
+    case FXCODEC_IMAGE_BMP:
+#endif  // PDF_ENABLE_XFA_BMP
+    case FXCODEC_IMAGE_JPG:
+#ifdef PDF_ENABLE_XFA_PNG
+    case FXCODEC_IMAGE_PNG:
+#endif  // PDF_ENABLE_XFA_PNG
+#ifdef PDF_ENABLE_XFA_TIFF
+    case FXCODEC_IMAGE_TIFF:
+#endif  // PDF_ENABLE_XFA_TIFF
+      m_FrameNumber = 1;
+      m_status = FXCODEC_STATUS_DECODE_READY;
+      return {m_status, 1};
+#ifdef PDF_ENABLE_XFA_GIF
+    case FXCODEC_IMAGE_GIF: {
+      CCodec_GifModule* pGifModule = m_pCodecMgr->GetGifModule();
+      if (!pGifModule) {
+        m_status = FXCODEC_STATUS_ERR_MEMORY;
+        return {m_status, 0};
+      }
+      while (true) {
+        CFX_GifDecodeStatus readResult;
+        std::tie(readResult, m_FrameNumber) =
+            pGifModule->LoadFrameInfo(m_pGifContext.get());
+        while (readResult == CFX_GifDecodeStatus::Unfinished) {
+          FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_READ;
+          if (!GifReadMoreData(pGifModule, error_status))
+            return {error_status, 0};
+
+          std::tie(readResult, m_FrameNumber) =
+              pGifModule->LoadFrameInfo(m_pGifContext.get());
+        }
+        if (readResult == CFX_GifDecodeStatus::Success) {
+          m_status = FXCODEC_STATUS_DECODE_READY;
+          return {m_status, m_FrameNumber};
+        }
+        m_pGifContext = nullptr;
+        m_status = FXCODEC_STATUS_ERROR;
+        return {m_status, 0};
+      }
+    }
+#endif  // PDF_ENABLE_XFA_GIF
+    default:
+      return {FXCODEC_STATUS_ERROR, 0};
+  }
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::StartDecode(
+    const RetainPtr<CFX_DIBitmap>& pDIBitmap,
+    int start_x,
+    int start_y,
+    int size_x,
+    int size_y) {
+  if (m_status != FXCODEC_STATUS_DECODE_READY)
+    return FXCODEC_STATUS_ERROR;
+
+  if (!pDIBitmap || pDIBitmap->GetBPP() < 8 || m_FrameNumber == 0)
+    return FXCODEC_STATUS_ERR_PARAMS;
+
+  m_pDeviceBitmap = pDIBitmap;
+  if (m_clipBox.IsEmpty())
+    return FXCODEC_STATUS_ERR_PARAMS;
+  if (size_x <= 0 || size_x > 65535 || size_y <= 0 || size_y > 65535)
+    return FXCODEC_STATUS_ERR_PARAMS;
+
+  FX_RECT device_rc =
+      FX_RECT(start_x, start_y, start_x + size_x, start_y + size_y);
+  int32_t out_range_x = device_rc.right - pDIBitmap->GetWidth();
+  int32_t out_range_y = device_rc.bottom - pDIBitmap->GetHeight();
+  device_rc.Intersect(
+      FX_RECT(0, 0, pDIBitmap->GetWidth(), pDIBitmap->GetHeight()));
+  if (device_rc.IsEmpty())
+    return FXCODEC_STATUS_ERR_PARAMS;
+
+  m_startX = device_rc.left;
+  m_startY = device_rc.top;
+  m_sizeX = device_rc.Width();
+  m_sizeY = device_rc.Height();
+  m_FrameCur = 0;
+  if (start_x < 0 || out_range_x > 0) {
+    float scaleX = (float)m_clipBox.Width() / (float)size_x;
+    if (start_x < 0) {
+      m_clipBox.left -= (int32_t)ceil((float)start_x * scaleX);
+    }
+    if (out_range_x > 0) {
+      m_clipBox.right -= (int32_t)floor((float)out_range_x * scaleX);
+    }
+  }
+  if (start_y < 0 || out_range_y > 0) {
+    float scaleY = (float)m_clipBox.Height() / (float)size_y;
+    if (start_y < 0) {
+      m_clipBox.top -= (int32_t)ceil((float)start_y * scaleY);
+    }
+    if (out_range_y > 0) {
+      m_clipBox.bottom -= (int32_t)floor((float)out_range_y * scaleY);
+    }
+  }
+  if (m_clipBox.IsEmpty()) {
+    return FXCODEC_STATUS_ERR_PARAMS;
+  }
+  switch (m_imageType) {
+#ifdef PDF_ENABLE_XFA_BMP
+    case FXCODEC_IMAGE_BMP:
+      return BmpStartDecode(pDIBitmap);
+#endif  // PDF_ENABLE_XFA_BMP
+#ifdef PDF_ENABLE_XFA_GIF
+    case FXCODEC_IMAGE_GIF:
+      return GifStartDecode(pDIBitmap);
+#endif  // PDF_ENABLE_XFA_GIF
+    case FXCODEC_IMAGE_JPG:
+      return JpegStartDecode(pDIBitmap);
+#ifdef PDF_ENABLE_XFA_PNG
+    case FXCODEC_IMAGE_PNG:
+      return PngStartDecode(pDIBitmap);
+#endif  // PDF_ENABLE_XFA_PNG
+#ifdef PDF_ENABLE_XFA_TIFF
+    case FXCODEC_IMAGE_TIFF:
+      m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
+      return m_status;
+#endif  // PDF_ENABLE_XFA_TIFF
+    default:
+      return FXCODEC_STATUS_ERROR;
+  }
+}
+
+FXCODEC_STATUS CCodec_ProgressiveDecoder::ContinueDecode() {
+  if (m_status != FXCODEC_STATUS_DECODE_TOBECONTINUE)
+    return FXCODEC_STATUS_ERROR;
+
+  switch (m_imageType) {
+    case FXCODEC_IMAGE_JPG:
+      return JpegContinueDecode();
+#ifdef PDF_ENABLE_XFA_BMP
+    case FXCODEC_IMAGE_BMP:
+      return BmpContinueDecode();
+#endif  // PDF_ENABLE_XFA_BMP
+#ifdef PDF_ENABLE_XFA_GIF
+    case FXCODEC_IMAGE_GIF:
+      return GifContinueDecode();
+#endif  // PDF_ENABLE_XFA_GIF
+#ifdef PDF_ENABLE_XFA_PNG
+    case FXCODEC_IMAGE_PNG:
+      return PngContinueDecode();
+#endif  // PDF_ENABLE_XFA_PNG
+#ifdef PDF_ENABLE_XFA_TIFF
+    case FXCODEC_IMAGE_TIFF:
+      return TiffContinueDecode();
+#endif  // PDF_ENABLE_XFA_TIFF
+    default:
+      return FXCODEC_STATUS_ERROR;
+  }
+}
+
+std::unique_ptr<CCodec_ProgressiveDecoder>
+CCodec_ModuleMgr::CreateProgressiveDecoder() {
+  return pdfium::MakeUnique<CCodec_ProgressiveDecoder>(this);
+}