Split fx_dib part 4

- Moved CFX_DIBitmap code to its own cpp file.
- Moved CFX_DIBExtractor out from fx_dib.h

Change-Id: I7b3fe9c657a350320b7ecb3f005017080491fe29
Reviewed-on: https://pdfium-review.googlesource.com/3591
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

6 files changed, 1526 insertions, 1481 deletions

diff --git a/core/fxge/dib/cfx_dibextractor.cpp b/core/fxge/dib/cfx_dibextractor.cpp
new file mode 100644
index 0000000000..8de69e2e3b
--- /dev/null
+++ b/core/fxge/dib/cfx_dibextractor.cpp
@@ -0,0 +1,27 @@
+// 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/fxge/dib/cfx_dibextractor.h"
+
+#include "core/fxge/dib/cfx_dibsource.h"
+
+CFX_DIBExtractor::CFX_DIBExtractor(const CFX_RetainPtr<CFX_DIBSource>& pSrc) {
+  if (!pSrc->GetBuffer()) {
+    m_pBitmap = pSrc->Clone();
+    return;
+  }
+  CFX_RetainPtr<CFX_DIBSource> pOldSrc(pSrc);
+  m_pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+  if (!m_pBitmap->Create(pOldSrc->GetWidth(), pOldSrc->GetHeight(),
+                         pOldSrc->GetFormat(), pOldSrc->GetBuffer())) {
+    m_pBitmap.Reset();
+    return;
+  }
+  m_pBitmap->SetPalette(pOldSrc->GetPalette());
+  m_pBitmap->SetAlphaMask(pOldSrc->m_pAlphaMask);
+}
+
+CFX_DIBExtractor::~CFX_DIBExtractor() {}
diff --git a/core/fxge/dib/cfx_dibextractor.h b/core/fxge/dib/cfx_dibextractor.h
new file mode 100644
index 0000000000..25d80ecb94
--- /dev/null
+++ b/core/fxge/dib/cfx_dibextractor.h
@@ -0,0 +1,26 @@
+// 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
+
+#ifndef CORE_FXGE_DIB_CFX_DIBEXTRACTOR_H_
+#define CORE_FXGE_DIB_CFX_DIBEXTRACTOR_H_
+
+#include "core/fxcrt/cfx_retain_ptr.h"
+#include "core/fxge/dib/cfx_dibitmap.h"
+
+class CFX_DIBSource;
+
+class CFX_DIBExtractor {
+ public:
+  explicit CFX_DIBExtractor(const CFX_RetainPtr<CFX_DIBSource>& pSrc);
+  ~CFX_DIBExtractor();
+
+  CFX_RetainPtr<CFX_DIBitmap> GetBitmap() { return m_pBitmap; }
+
+ private:
+  CFX_RetainPtr<CFX_DIBitmap> m_pBitmap;
+};
+
+#endif  // CORE_FXGE_DIB_CFX_DIBEXTRACTOR_H_
diff --git a/core/fxge/dib/cfx_dibitmap.cpp b/core/fxge/dib/cfx_dibitmap.cpp
new file mode 100644
index 0000000000..0adc088b53
--- /dev/null
+++ b/core/fxge/dib/cfx_dibitmap.cpp
@@ -0,0 +1,1469 @@
+// 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/fxge/dib/cfx_dibitmap.h"
+
+#include <limits>
+#include <memory>
+#include <utility>
+
+#include "core/fxcodec/fx_codec.h"
+#include "core/fxge/cfx_gemodule.h"
+#include "core/fxge/dib/dib_int.h"
+#include "core/fxge/ge/cfx_cliprgn.h"
+#include "third_party/base/ptr_util.h"
+
+#define MAX_OOM_LIMIT 12000000
+
+CFX_DIBitmap::CFX_DIBitmap() {
+  m_bExtBuf = false;
+  m_pBuffer = nullptr;
+  m_pPalette = nullptr;
+#ifdef _SKIA_SUPPORT_PATHS_
+  m_nFormat = Format::kCleared;
+#endif
+}
+
+bool CFX_DIBitmap::Create(int width,
+                          int height,
+                          FXDIB_Format format,
+                          uint8_t* pBuffer,
+                          int pitch) {
+  m_pBuffer = nullptr;
+  m_bpp = static_cast<uint8_t>(format);
+  m_AlphaFlag = static_cast<uint8_t>(format >> 8);
+  m_Width = m_Height = m_Pitch = 0;
+  if (width <= 0 || height <= 0 || pitch < 0)
+    return false;
+
+  if ((INT_MAX - 31) / width < (format & 0xff))
+    return false;
+
+  if (!pitch)
+    pitch = (width * (format & 0xff) + 31) / 32 * 4;
+
+  if ((1 << 30) / pitch < height)
+    return false;
+
+  if (pBuffer) {
+    m_pBuffer = pBuffer;
+    m_bExtBuf = true;
+  } else {
+    int size = pitch * height + 4;
+    int oomlimit = MAX_OOM_LIMIT;
+    if (oomlimit >= 0 && size >= oomlimit) {
+      m_pBuffer = FX_TryAlloc(uint8_t, size);
+      if (!m_pBuffer)
+        return false;
+    } else {
+      m_pBuffer = FX_Alloc(uint8_t, size);
+    }
+  }
+  m_Width = width;
+  m_Height = height;
+  m_Pitch = pitch;
+  if (!HasAlpha() || format == FXDIB_Argb)
+    return true;
+
+  if (BuildAlphaMask())
+    return true;
+
+  if (m_bExtBuf)
+    return true;
+
+  FX_Free(m_pBuffer);
+  m_pBuffer = nullptr;
+  m_Width = m_Height = m_Pitch = 0;
+  return false;
+}
+
+bool CFX_DIBitmap::Copy(const CFX_RetainPtr<CFX_DIBSource>& pSrc) {
+  if (m_pBuffer)
+    return false;
+
+  if (!Create(pSrc->GetWidth(), pSrc->GetHeight(), pSrc->GetFormat()))
+    return false;
+
+  SetPalette(pSrc->GetPalette());
+  SetAlphaMask(pSrc->m_pAlphaMask);
+  for (int row = 0; row < pSrc->GetHeight(); row++)
+    FXSYS_memcpy(m_pBuffer + row * m_Pitch, pSrc->GetScanline(row), m_Pitch);
+  return true;
+}
+
+CFX_DIBitmap::~CFX_DIBitmap() {
+  if (!m_bExtBuf)
+    FX_Free(m_pBuffer);
+}
+
+uint8_t* CFX_DIBitmap::GetBuffer() const {
+  return m_pBuffer;
+}
+
+const uint8_t* CFX_DIBitmap::GetScanline(int line) const {
+  return m_pBuffer ? m_pBuffer + line * m_Pitch : nullptr;
+}
+
+void CFX_DIBitmap::TakeOver(CFX_RetainPtr<CFX_DIBitmap>&& pSrcBitmap) {
+  if (!m_bExtBuf)
+    FX_Free(m_pBuffer);
+
+  m_pBuffer = pSrcBitmap->m_pBuffer;
+  m_pPalette = std::move(pSrcBitmap->m_pPalette);
+  m_pAlphaMask = pSrcBitmap->m_pAlphaMask;
+  pSrcBitmap->m_pBuffer = nullptr;
+  pSrcBitmap->m_pAlphaMask = nullptr;
+  m_bpp = pSrcBitmap->m_bpp;
+  m_bExtBuf = pSrcBitmap->m_bExtBuf;
+  m_AlphaFlag = pSrcBitmap->m_AlphaFlag;
+  m_Width = pSrcBitmap->m_Width;
+  m_Height = pSrcBitmap->m_Height;
+  m_Pitch = pSrcBitmap->m_Pitch;
+}
+
+void CFX_DIBitmap::Clear(uint32_t color) {
+  if (!m_pBuffer) {
+    return;
+  }
+  switch (GetFormat()) {
+    case FXDIB_1bppMask:
+      FXSYS_memset(m_pBuffer, (color & 0xff000000) ? 0xff : 0,
+                   m_Pitch * m_Height);
+      break;
+    case FXDIB_1bppRgb: {
+      int index = FindPalette(color);
+      FXSYS_memset(m_pBuffer, index ? 0xff : 0, m_Pitch * m_Height);
+      break;
+    }
+    case FXDIB_8bppMask:
+      FXSYS_memset(m_pBuffer, color >> 24, m_Pitch * m_Height);
+      break;
+    case FXDIB_8bppRgb: {
+      int index = FindPalette(color);
+      FXSYS_memset(m_pBuffer, index, m_Pitch * m_Height);
+      break;
+    }
+    case FXDIB_Rgb:
+    case FXDIB_Rgba: {
+      int a, r, g, b;
+      ArgbDecode(color, a, r, g, b);
+      if (r == g && g == b) {
+        FXSYS_memset(m_pBuffer, r, m_Pitch * m_Height);
+      } else {
+        int byte_pos = 0;
+        for (int col = 0; col < m_Width; col++) {
+          m_pBuffer[byte_pos++] = b;
+          m_pBuffer[byte_pos++] = g;
+          m_pBuffer[byte_pos++] = r;
+        }
+        for (int row = 1; row < m_Height; row++) {
+          FXSYS_memcpy(m_pBuffer + row * m_Pitch, m_pBuffer, m_Pitch);
+        }
+      }
+      break;
+    }
+    case FXDIB_Rgb32:
+    case FXDIB_Argb: {
+      color = IsCmykImage() ? FXCMYK_TODIB(color) : FXARGB_TODIB(color);
+#ifdef _SKIA_SUPPORT_
+      if (FXDIB_Rgb32 == GetFormat() && !IsCmykImage()) {
+        color |= 0xFF000000;
+      }
+#endif
+      for (int i = 0; i < m_Width; i++) {
+        ((uint32_t*)m_pBuffer)[i] = color;
+      }
+      for (int row = 1; row < m_Height; row++) {
+        FXSYS_memcpy(m_pBuffer + row * m_Pitch, m_pBuffer, m_Pitch);
+      }
+      break;
+    }
+    default:
+      break;
+  }
+}
+
+bool CFX_DIBitmap::TransferBitmap(
+    int dest_left,
+    int dest_top,
+    int width,
+    int height,
+    const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
+    int src_left,
+    int src_top) {
+  if (!m_pBuffer)
+    return false;
+
+  GetOverlapRect(dest_left, dest_top, width, height, pSrcBitmap->GetWidth(),
+                 pSrcBitmap->GetHeight(), src_left, src_top, nullptr);
+  if (width == 0 || height == 0)
+    return true;
+
+  FXDIB_Format dest_format = GetFormat();
+  FXDIB_Format src_format = pSrcBitmap->GetFormat();
+  if (dest_format == src_format) {
+    if (GetBPP() == 1) {
+      for (int row = 0; row < height; row++) {
+        uint8_t* dest_scan = m_pBuffer + (dest_top + row) * m_Pitch;
+        const uint8_t* src_scan = pSrcBitmap->GetScanline(src_top + row);
+        for (int col = 0; col < width; col++) {
+          if (src_scan[(src_left + col) / 8] &
+              (1 << (7 - (src_left + col) % 8))) {
+            dest_scan[(dest_left + col) / 8] |= 1
+                                                << (7 - (dest_left + col) % 8);
+          } else {
+            dest_scan[(dest_left + col) / 8] &=
+                ~(1 << (7 - (dest_left + col) % 8));
+          }
+        }
+      }
+    } else {
+      int Bpp = GetBPP() / 8;
+      for (int row = 0; row < height; row++) {
+        uint8_t* dest_scan =
+            m_pBuffer + (dest_top + row) * m_Pitch + dest_left * Bpp;
+        const uint8_t* src_scan =
+            pSrcBitmap->GetScanline(src_top + row) + src_left * Bpp;
+        FXSYS_memcpy(dest_scan, src_scan, width * Bpp);
+      }
+    }
+  } else {
+    if (m_pPalette)
+      return false;
+
+    if (m_bpp == 8)
+      dest_format = FXDIB_8bppMask;
+
+    uint8_t* dest_buf =
+        m_pBuffer + dest_top * m_Pitch + dest_left * GetBPP() / 8;
+    std::unique_ptr<uint32_t, FxFreeDeleter> d_plt;
+    if (!ConvertBuffer(dest_format, dest_buf, m_Pitch, width, height,
+                       pSrcBitmap, src_left, src_top, &d_plt)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::TransferMask(int dest_left,
+                                int dest_top,
+                                int width,
+                                int height,
+                                const CFX_RetainPtr<CFX_DIBSource>& pMask,
+                                uint32_t color,
+                                int src_left,
+                                int src_top,
+                                int alpha_flag,
+                                void* pIccTransform) {
+  if (!m_pBuffer) {
+    return false;
+  }
+  ASSERT(HasAlpha() && (m_bpp >= 24));
+  ASSERT(pMask->IsAlphaMask());
+  if (!HasAlpha() || !pMask->IsAlphaMask() || m_bpp < 24) {
+    return false;
+  }
+  GetOverlapRect(dest_left, dest_top, width, height, pMask->GetWidth(),
+                 pMask->GetHeight(), src_left, src_top, nullptr);
+  if (width == 0 || height == 0) {
+    return true;
+  }
+  int src_bpp = pMask->GetBPP();
+  int alpha;
+  uint32_t dst_color;
+  if (alpha_flag >> 8) {
+    alpha = alpha_flag & 0xff;
+    dst_color = FXCMYK_TODIB(color);
+  } else {
+    alpha = FXARGB_A(color);
+    dst_color = FXARGB_TODIB(color);
+  }
+  uint8_t* color_p = (uint8_t*)&dst_color;
+  if (pIccTransform && CFX_GEModule::Get()->GetCodecModule() &&
+      CFX_GEModule::Get()->GetCodecModule()->GetIccModule()) {
+    CCodec_IccModule* pIccModule =
+        CFX_GEModule::Get()->GetCodecModule()->GetIccModule();
+    pIccModule->TranslateScanline(pIccTransform, color_p, color_p, 1);
+  } else {
+    if (alpha_flag >> 8 && !IsCmykImage()) {
+      AdobeCMYK_to_sRGB1(FXSYS_GetCValue(color), FXSYS_GetMValue(color),
+                         FXSYS_GetYValue(color), FXSYS_GetKValue(color),
+                         color_p[2], color_p[1], color_p[0]);
+    } else if (!(alpha_flag >> 8) && IsCmykImage()) {
+      return false;
+    }
+  }
+  if (!IsCmykImage()) {
+    color_p[3] = (uint8_t)alpha;
+  }
+  if (GetFormat() == FXDIB_Argb) {
+    for (int row = 0; row < height; row++) {
+      uint32_t* dest_pos =
+          (uint32_t*)(m_pBuffer + (dest_top + row) * m_Pitch + dest_left * 4);
+      const uint8_t* src_scan = pMask->GetScanline(src_top + row);
+      if (src_bpp == 1) {
+        for (int col = 0; col < width; col++) {
+          int src_bitpos = src_left + col;
+          if (src_scan[src_bitpos / 8] & (1 << (7 - src_bitpos % 8))) {
+            *dest_pos = dst_color;
+          } else {
+            *dest_pos = 0;
+          }
+          dest_pos++;
+        }
+      } else {
+        src_scan += src_left;
+        dst_color = FXARGB_TODIB(dst_color);
+        dst_color &= 0xffffff;
+        for (int col = 0; col < width; col++) {
+          FXARGB_SETDIB(dest_pos++,
+                        dst_color | ((alpha * (*src_scan++) / 255) << 24));
+        }
+      }
+    }
+  } else {
+    int comps = m_bpp / 8;
+    for (int row = 0; row < height; row++) {
+      uint8_t* dest_color_pos =
+          m_pBuffer + (dest_top + row) * m_Pitch + dest_left * comps;
+      uint8_t* dest_alpha_pos =
+          (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left;
+      const uint8_t* src_scan = pMask->GetScanline(src_top + row);
+      if (src_bpp == 1) {
+        for (int col = 0; col < width; col++) {
+          int src_bitpos = src_left + col;
+          if (src_scan[src_bitpos / 8] & (1 << (7 - src_bitpos % 8))) {
+            FXSYS_memcpy(dest_color_pos, color_p, comps);
+            *dest_alpha_pos = 0xff;
+          } else {
+            FXSYS_memset(dest_color_pos, 0, comps);
+            *dest_alpha_pos = 0;
+          }
+          dest_color_pos += comps;
+          dest_alpha_pos++;
+        }
+      } else {
+        src_scan += src_left;
+        for (int col = 0; col < width; col++) {
+          FXSYS_memcpy(dest_color_pos, color_p, comps);
+          dest_color_pos += comps;
+          *dest_alpha_pos++ = (alpha * (*src_scan++) / 255);
+        }
+      }
+    }
+  }
+  return true;
+}
+
+const int g_ChannelOffset[] = {0, 2, 1, 0, 0, 1, 2, 3, 3};
+bool CFX_DIBitmap::LoadChannel(FXDIB_Channel destChannel,
+                               const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                               FXDIB_Channel srcChannel) {
+  if (!m_pBuffer)
+    return false;
+
+  CFX_RetainPtr<CFX_DIBSource> pSrcClone = pSrcBitmap;
+  int srcOffset;
+  if (srcChannel == FXDIB_Alpha) {
+    if (!pSrcBitmap->HasAlpha() && !pSrcBitmap->IsAlphaMask())
+      return false;
+
+    if (pSrcBitmap->GetBPP() == 1) {
+      pSrcClone = pSrcBitmap->CloneConvert(FXDIB_8bppMask);
+      if (!pSrcClone)
+        return false;
+    }
+    srcOffset = pSrcBitmap->GetFormat() == FXDIB_Argb ? 3 : 0;
+  } else {
+    if (pSrcBitmap->IsAlphaMask())
+      return false;
+
+    if (pSrcBitmap->GetBPP() < 24) {
+      if (pSrcBitmap->IsCmykImage()) {
+        pSrcClone = pSrcBitmap->CloneConvert(static_cast<FXDIB_Format>(
+            (pSrcBitmap->GetFormat() & 0xff00) | 0x20));
+      } else {
+        pSrcClone = pSrcBitmap->CloneConvert(static_cast<FXDIB_Format>(
+            (pSrcBitmap->GetFormat() & 0xff00) | 0x18));
+      }
+      if (!pSrcClone)
+        return false;
+    }
+    srcOffset = g_ChannelOffset[srcChannel];
+  }
+  int destOffset = 0;
+  if (destChannel == FXDIB_Alpha) {
+    if (IsAlphaMask()) {
+      if (!ConvertFormat(FXDIB_8bppMask))
+        return false;
+    } else {
+      if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb))
+        return false;
+
+      if (GetFormat() == FXDIB_Argb)
+        destOffset = 3;
+    }
+  } else {
+    if (IsAlphaMask())
+      return false;
+
+    if (GetBPP() < 24) {
+      if (HasAlpha()) {
+        if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb))
+          return false;
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+      } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb32)) {
+#else
+      } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb)) {
+#endif
+        return false;
+      }
+    }
+    destOffset = g_ChannelOffset[destChannel];
+  }
+  if (srcChannel == FXDIB_Alpha && pSrcClone->m_pAlphaMask) {
+    CFX_RetainPtr<CFX_DIBSource> pAlphaMask = pSrcClone->m_pAlphaMask;
+    if (pSrcClone->GetWidth() != m_Width ||
+        pSrcClone->GetHeight() != m_Height) {
+      if (pAlphaMask) {
+        pAlphaMask = pAlphaMask->StretchTo(m_Width, m_Height);
+        if (!pAlphaMask)
+          return false;
+      }
+    }
+    pSrcClone = std::move(pAlphaMask);
+    srcOffset = 0;
+  } else if (pSrcClone->GetWidth() != m_Width ||
+             pSrcClone->GetHeight() != m_Height) {
+    CFX_RetainPtr<CFX_DIBitmap> pSrcMatched =
+        pSrcClone->StretchTo(m_Width, m_Height);
+    if (!pSrcMatched)
+      return false;
+
+    pSrcClone = std::move(pSrcMatched);
+  }
+  CFX_RetainPtr<CFX_DIBitmap> pDst(this);
+  if (destChannel == FXDIB_Alpha && m_pAlphaMask) {
+    pDst = m_pAlphaMask;
+    destOffset = 0;
+  }
+  int srcBytes = pSrcClone->GetBPP() / 8;
+  int destBytes = pDst->GetBPP() / 8;
+  for (int row = 0; row < m_Height; row++) {
+    uint8_t* dest_pos = (uint8_t*)pDst->GetScanline(row) + destOffset;
+    const uint8_t* src_pos = pSrcClone->GetScanline(row) + srcOffset;
+    for (int col = 0; col < m_Width; col++) {
+      *dest_pos = *src_pos;
+      dest_pos += destBytes;
+      src_pos += srcBytes;
+    }
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::LoadChannel(FXDIB_Channel destChannel, int value) {
+  if (!m_pBuffer) {
+    return false;
+  }
+  int destOffset;
+  if (destChannel == FXDIB_Alpha) {
+    if (IsAlphaMask()) {
+      if (!ConvertFormat(FXDIB_8bppMask)) {
+        return false;
+      }
+      destOffset = 0;
+    } else {
+      destOffset = 0;
+      if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb)) {
+        return false;
+      }
+      if (GetFormat() == FXDIB_Argb) {
+        destOffset = 3;
+      }
+    }
+  } else {
+    if (IsAlphaMask()) {
+      return false;
+    }
+    if (GetBPP() < 24) {
+      if (HasAlpha()) {
+        if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb)) {
+          return false;
+        }
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+      } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb)) {
+#else
+      } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb32)) {
+#endif
+        return false;
+      }
+    }
+    destOffset = g_ChannelOffset[destChannel];
+  }
+  int Bpp = GetBPP() / 8;
+  if (Bpp == 1) {
+    FXSYS_memset(m_pBuffer, value, m_Height * m_Pitch);
+    return true;
+  }
+  if (destChannel == FXDIB_Alpha && m_pAlphaMask) {
+    FXSYS_memset(m_pAlphaMask->GetBuffer(), value,
+                 m_pAlphaMask->GetHeight() * m_pAlphaMask->GetPitch());
+    return true;
+  }
+  for (int row = 0; row < m_Height; row++) {
+    uint8_t* scan_line = m_pBuffer + row * m_Pitch + destOffset;
+    for (int col = 0; col < m_Width; col++) {
+      *scan_line = value;
+      scan_line += Bpp;
+    }
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::MultiplyAlpha(
+    const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap) {
+  if (!m_pBuffer)
+    return false;
+
+  ASSERT(pSrcBitmap->IsAlphaMask());
+  if (!pSrcBitmap->IsAlphaMask())
+    return false;
+
+  if (!IsAlphaMask() && !HasAlpha())
+    return LoadChannel(FXDIB_Alpha, pSrcBitmap, FXDIB_Alpha);
+
+  CFX_RetainPtr<CFX_DIBitmap> pSrcClone = pSrcBitmap.As<CFX_DIBitmap>();
+  if (pSrcBitmap->GetWidth() != m_Width ||
+      pSrcBitmap->GetHeight() != m_Height) {
+    pSrcClone = pSrcBitmap->StretchTo(m_Width, m_Height);
+    if (!pSrcClone)
+      return false;
+  }
+  if (IsAlphaMask()) {
+    if (!ConvertFormat(FXDIB_8bppMask))
+      return false;
+
+    for (int row = 0; row < m_Height; row++) {
+      uint8_t* dest_scan = m_pBuffer + m_Pitch * row;
+      uint8_t* src_scan = pSrcClone->m_pBuffer + pSrcClone->m_Pitch * row;
+      if (pSrcClone->GetBPP() == 1) {
+        for (int col = 0; col < m_Width; col++) {
+          if (!((1 << (7 - col % 8)) & src_scan[col / 8]))
+            dest_scan[col] = 0;
+        }
+      } else {
+        for (int col = 0; col < m_Width; col++) {
+          *dest_scan = (*dest_scan) * src_scan[col] / 255;
+          dest_scan++;
+        }
+      }
+    }
+  } else {
+    if (GetFormat() == FXDIB_Argb) {
+      if (pSrcClone->GetBPP() == 1)
+        return false;
+
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* dest_scan = m_pBuffer + m_Pitch * row + 3;
+        uint8_t* src_scan = pSrcClone->m_pBuffer + pSrcClone->m_Pitch * row;
+        for (int col = 0; col < m_Width; col++) {
+          *dest_scan = (*dest_scan) * src_scan[col] / 255;
+          dest_scan += 4;
+        }
+      }
+    } else {
+      m_pAlphaMask->MultiplyAlpha(pSrcClone);
+    }
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::GetGrayData(void* pIccTransform) {
+  if (!m_pBuffer) {
+    return false;
+  }
+  switch (GetFormat()) {
+    case FXDIB_1bppRgb: {
+      if (!m_pPalette)
+        return false;
+
+      uint8_t gray[2];
+      for (int i = 0; i < 2; i++) {
+        int r = static_cast<uint8_t>(m_pPalette.get()[i] >> 16);
+        int g = static_cast<uint8_t>(m_pPalette.get()[i] >> 8);
+        int b = static_cast<uint8_t>(m_pPalette.get()[i]);
+        gray[i] = static_cast<uint8_t>(FXRGB2GRAY(r, g, b));
+      }
+      auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
+      if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask))
+        return false;
+
+      FXSYS_memset(pMask->GetBuffer(), gray[0], pMask->GetPitch() * m_Height);
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* src_pos = m_pBuffer + row * m_Pitch;
+        uint8_t* dest_pos = (uint8_t*)pMask->GetScanline(row);
+        for (int col = 0; col < m_Width; col++) {
+          if (src_pos[col / 8] & (1 << (7 - col % 8))) {
+            *dest_pos = gray[1];
+          }
+          dest_pos++;
+        }
+      }
+      TakeOver(std::move(pMask));
+      break;
+    }
+    case FXDIB_8bppRgb: {
+      if (!m_pPalette)
+        return false;
+
+      uint8_t gray[256];
+      for (int i = 0; i < 256; i++) {
+        int r = static_cast<uint8_t>(m_pPalette.get()[i] >> 16);
+        int g = static_cast<uint8_t>(m_pPalette.get()[i] >> 8);
+        int b = static_cast<uint8_t>(m_pPalette.get()[i]);
+        gray[i] = static_cast<uint8_t>(FXRGB2GRAY(r, g, b));
+      }
+      auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
+      if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask))
+        return false;
+
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch();
+        uint8_t* src_pos = m_pBuffer + row * m_Pitch;
+        for (int col = 0; col < m_Width; col++) {
+          *dest_pos++ = gray[*src_pos++];
+        }
+      }
+      TakeOver(std::move(pMask));
+      break;
+    }
+    case FXDIB_Rgb: {
+      auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
+      if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask))
+        return false;
+
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* src_pos = m_pBuffer + row * m_Pitch;
+        uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch();
+        for (int col = 0; col < m_Width; col++) {
+          *dest_pos++ = FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos);
+          src_pos += 3;
+        }
+      }
+      TakeOver(std::move(pMask));
+      break;
+    }
+    case FXDIB_Rgb32: {
+      auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
+      if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask))
+        return false;
+
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* src_pos = m_pBuffer + row * m_Pitch;
+        uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch();
+        for (int col = 0; col < m_Width; col++) {
+          *dest_pos++ = FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos);
+          src_pos += 4;
+        }
+      }
+      TakeOver(std::move(pMask));
+      break;
+    }
+    default:
+      return false;
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::MultiplyAlpha(int alpha) {
+  if (!m_pBuffer) {
+    return false;
+  }
+  switch (GetFormat()) {
+    case FXDIB_1bppMask:
+      if (!ConvertFormat(FXDIB_8bppMask)) {
+        return false;
+      }
+      MultiplyAlpha(alpha);
+      break;
+    case FXDIB_8bppMask: {
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* scan_line = m_pBuffer + row * m_Pitch;
+        for (int col = 0; col < m_Width; col++) {
+          scan_line[col] = scan_line[col] * alpha / 255;
+        }
+      }
+      break;
+    }
+    case FXDIB_Argb: {
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* scan_line = m_pBuffer + row * m_Pitch + 3;
+        for (int col = 0; col < m_Width; col++) {
+          *scan_line = (*scan_line) * alpha / 255;
+          scan_line += 4;
+        }
+      }
+      break;
+    }
+    default:
+      if (HasAlpha()) {
+        m_pAlphaMask->MultiplyAlpha(alpha);
+      } else if (IsCmykImage()) {
+        if (!ConvertFormat((FXDIB_Format)(GetFormat() | 0x0200))) {
+          return false;
+        }
+        m_pAlphaMask->MultiplyAlpha(alpha);
+      } else {
+        if (!ConvertFormat(FXDIB_Argb)) {
+          return false;
+        }
+        MultiplyAlpha(alpha);
+      }
+      break;
+  }
+  return true;
+}
+
+uint32_t CFX_DIBitmap::GetPixel(int x, int y) const {
+  if (!m_pBuffer) {
+    return 0;
+  }
+  uint8_t* pos = m_pBuffer + y * m_Pitch + x * GetBPP() / 8;
+  switch (GetFormat()) {
+    case FXDIB_1bppMask: {
+      if ((*pos) & (1 << (7 - x % 8))) {
+        return 0xff000000;
+      }
+      return 0;
+    }
+    case FXDIB_1bppRgb: {
+      if ((*pos) & (1 << (7 - x % 8))) {
+        return m_pPalette ? m_pPalette.get()[1] : 0xffffffff;
+      }
+      return m_pPalette ? m_pPalette.get()[0] : 0xff000000;
+    }
+    case FXDIB_8bppMask:
+      return (*pos) << 24;
+    case FXDIB_8bppRgb:
+      return m_pPalette ? m_pPalette.get()[*pos]
+                        : (0xff000000 | ((*pos) * 0x10101));
+    case FXDIB_Rgb:
+    case FXDIB_Rgba:
+    case FXDIB_Rgb32:
+      return FXARGB_GETDIB(pos) | 0xff000000;
+    case FXDIB_Argb:
+      return FXARGB_GETDIB(pos);
+    default:
+      break;
+  }
+  return 0;
+}
+
+void CFX_DIBitmap::SetPixel(int x, int y, uint32_t color) {
+  if (!m_pBuffer) {
+    return;
+  }
+  if (x < 0 || x >= m_Width || y < 0 || y >= m_Height) {
+    return;
+  }
+  uint8_t* pos = m_pBuffer + y * m_Pitch + x * GetBPP() / 8;
+  switch (GetFormat()) {
+    case FXDIB_1bppMask:
+      if (color >> 24) {
+        *pos |= 1 << (7 - x % 8);
+      } else {
+        *pos &= ~(1 << (7 - x % 8));
+      }
+      break;
+    case FXDIB_1bppRgb:
+      if (m_pPalette) {
+        if (color == m_pPalette.get()[1]) {
+          *pos |= 1 << (7 - x % 8);
+        } else {
+          *pos &= ~(1 << (7 - x % 8));
+        }
+      } else {
+        if (color == 0xffffffff) {
+          *pos |= 1 << (7 - x % 8);
+        } else {
+          *pos &= ~(1 << (7 - x % 8));
+        }
+      }
+      break;
+    case FXDIB_8bppMask:
+      *pos = (uint8_t)(color >> 24);
+      break;
+    case FXDIB_8bppRgb: {
+      if (m_pPalette) {
+        for (int i = 0; i < 256; i++) {
+          if (m_pPalette.get()[i] == color) {
+            *pos = (uint8_t)i;
+            return;
+          }
+        }
+        *pos = 0;
+      } else {
+        *pos = FXRGB2GRAY(FXARGB_R(color), FXARGB_G(color), FXARGB_B(color));
+      }
+      break;
+    }
+    case FXDIB_Rgb:
+    case FXDIB_Rgb32: {
+      int alpha = FXARGB_A(color);
+      pos[0] = (FXARGB_B(color) * alpha + pos[0] * (255 - alpha)) / 255;
+      pos[1] = (FXARGB_G(color) * alpha + pos[1] * (255 - alpha)) / 255;
+      pos[2] = (FXARGB_R(color) * alpha + pos[2] * (255 - alpha)) / 255;
+      break;
+    }
+    case FXDIB_Rgba: {
+      pos[0] = FXARGB_B(color);
+      pos[1] = FXARGB_G(color);
+      pos[2] = FXARGB_R(color);
+      break;
+    }
+    case FXDIB_Argb:
+      FXARGB_SETDIB(pos, color);
+      break;
+    default:
+      break;
+  }
+}
+
+void CFX_DIBitmap::DownSampleScanline(int line,
+                                      uint8_t* dest_scan,
+                                      int dest_bpp,
+                                      int dest_width,
+                                      bool bFlipX,
+                                      int clip_left,
+                                      int clip_width) const {
+  if (!m_pBuffer) {
+    return;
+  }
+  int src_Bpp = m_bpp / 8;
+  uint8_t* scanline = m_pBuffer + line * m_Pitch;
+  if (src_Bpp == 0) {
+    for (int i = 0; i < clip_width; i++) {
+      uint32_t dest_x = clip_left + i;
+      uint32_t src_x = dest_x * m_Width / dest_width;
+      if (bFlipX) {
+        src_x = m_Width - src_x - 1;
+      }
+      src_x %= m_Width;
+      dest_scan[i] = (scanline[src_x / 8] & (1 << (7 - src_x % 8))) ? 255 : 0;
+    }
+  } else if (src_Bpp == 1) {
+    for (int i = 0; i < clip_width; i++) {
+      uint32_t dest_x = clip_left + i;
+      uint32_t src_x = dest_x * m_Width / dest_width;
+      if (bFlipX) {
+        src_x = m_Width - src_x - 1;
+      }
+      src_x %= m_Width;
+      int dest_pos = i;
+      if (m_pPalette) {
+        if (!IsCmykImage()) {
+          dest_pos *= 3;
+          FX_ARGB argb = m_pPalette.get()[scanline[src_x]];
+          dest_scan[dest_pos] = FXARGB_B(argb);
+          dest_scan[dest_pos + 1] = FXARGB_G(argb);
+          dest_scan[dest_pos + 2] = FXARGB_R(argb);
+        } else {
+          dest_pos *= 4;
+          FX_CMYK cmyk = m_pPalette.get()[scanline[src_x]];
+          dest_scan[dest_pos] = FXSYS_GetCValue(cmyk);
+          dest_scan[dest_pos + 1] = FXSYS_GetMValue(cmyk);
+          dest_scan[dest_pos + 2] = FXSYS_GetYValue(cmyk);
+          dest_scan[dest_pos + 3] = FXSYS_GetKValue(cmyk);
+        }
+      } else {
+        dest_scan[dest_pos] = scanline[src_x];
+      }
+    }
+  } else {
+    for (int i = 0; i < clip_width; i++) {
+      uint32_t dest_x = clip_left + i;
+      uint32_t src_x =
+          bFlipX ? (m_Width - dest_x * m_Width / dest_width - 1) * src_Bpp
+                 : (dest_x * m_Width / dest_width) * src_Bpp;
+      src_x %= m_Width * src_Bpp;
+      int dest_pos = i * src_Bpp;
+      for (int b = 0; b < src_Bpp; b++) {
+        dest_scan[dest_pos + b] = scanline[src_x + b];
+      }
+    }
+  }
+}
+
+// TODO(weili): Split this function into two for handling CMYK and RGB
+// colors separately.
+bool CFX_DIBitmap::ConvertColorScale(uint32_t forecolor, uint32_t backcolor) {
+  ASSERT(!IsAlphaMask());
+  if (!m_pBuffer || IsAlphaMask()) {
+    return false;
+  }
+  // Values used for CMYK colors.
+  int fc = 0;
+  int fm = 0;
+  int fy = 0;
+  int fk = 0;
+  int bc = 0;
+  int bm = 0;
+  int by = 0;
+  int bk = 0;
+  // Values used for RGB colors.
+  int fr = 0;
+  int fg = 0;
+  int fb = 0;
+  int br = 0;
+  int bg = 0;
+  int bb = 0;
+  bool isCmykImage = IsCmykImage();
+  if (isCmykImage) {
+    fc = FXSYS_GetCValue(forecolor);
+    fm = FXSYS_GetMValue(forecolor);
+    fy = FXSYS_GetYValue(forecolor);
+    fk = FXSYS_GetKValue(forecolor);
+    bc = FXSYS_GetCValue(backcolor);
+    bm = FXSYS_GetMValue(backcolor);
+    by = FXSYS_GetYValue(backcolor);
+    bk = FXSYS_GetKValue(backcolor);
+  } else {
+    fr = FXSYS_GetRValue(forecolor);
+    fg = FXSYS_GetGValue(forecolor);
+    fb = FXSYS_GetBValue(forecolor);
+    br = FXSYS_GetRValue(backcolor);
+    bg = FXSYS_GetGValue(backcolor);
+    bb = FXSYS_GetBValue(backcolor);
+  }
+  if (m_bpp <= 8) {
+    if (isCmykImage) {
+      if (forecolor == 0xff && backcolor == 0 && !m_pPalette) {
+        return true;
+      }
+    } else if (forecolor == 0 && backcolor == 0xffffff && !m_pPalette) {
+      return true;
+    }
+    if (!m_pPalette) {
+      BuildPalette();
+    }
+    int size = 1 << m_bpp;
+    if (isCmykImage) {
+      for (int i = 0; i < size; i++) {
+        uint8_t b, g, r;
+        AdobeCMYK_to_sRGB1(FXSYS_GetCValue(m_pPalette.get()[i]),
+                           FXSYS_GetMValue(m_pPalette.get()[i]),
+                           FXSYS_GetYValue(m_pPalette.get()[i]),
+                           FXSYS_GetKValue(m_pPalette.get()[i]), r, g, b);
+        int gray = 255 - FXRGB2GRAY(r, g, b);
+        m_pPalette.get()[i] = CmykEncode(
+            bc + (fc - bc) * gray / 255, bm + (fm - bm) * gray / 255,
+            by + (fy - by) * gray / 255, bk + (fk - bk) * gray / 255);
+      }
+    } else {
+      for (int i = 0; i < size; i++) {
+        int gray = FXRGB2GRAY(FXARGB_R(m_pPalette.get()[i]),
+                              FXARGB_G(m_pPalette.get()[i]),
+                              FXARGB_B(m_pPalette.get()[i]));
+        m_pPalette.get()[i] = FXARGB_MAKE(0xff, br + (fr - br) * gray / 255,
+                                          bg + (fg - bg) * gray / 255,
+                                          bb + (fb - bb) * gray / 255);
+      }
+    }
+    return true;
+  }
+  if (isCmykImage) {
+    if (forecolor == 0xff && backcolor == 0x00) {
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* scanline = m_pBuffer + row * m_Pitch;
+        for (int col = 0; col < m_Width; col++) {
+          uint8_t b, g, r;
+          AdobeCMYK_to_sRGB1(scanline[0], scanline[1], scanline[2], scanline[3],
+                             r, g, b);
+          *scanline++ = 0;
+          *scanline++ = 0;
+          *scanline++ = 0;
+          *scanline++ = 255 - FXRGB2GRAY(r, g, b);
+        }
+      }
+      return true;
+    }
+  } else if (forecolor == 0 && backcolor == 0xffffff) {
+    for (int row = 0; row < m_Height; row++) {
+      uint8_t* scanline = m_pBuffer + row * m_Pitch;
+      int gap = m_bpp / 8 - 2;
+      for (int col = 0; col < m_Width; col++) {
+        int gray = FXRGB2GRAY(scanline[2], scanline[1], scanline[0]);
+        *scanline++ = gray;
+        *scanline++ = gray;
+        *scanline = gray;
+        scanline += gap;
+      }
+    }
+    return true;
+  }
+  if (isCmykImage) {
+    for (int row = 0; row < m_Height; row++) {
+      uint8_t* scanline = m_pBuffer + row * m_Pitch;
+      for (int col = 0; col < m_Width; col++) {
+        uint8_t b, g, r;
+        AdobeCMYK_to_sRGB1(scanline[0], scanline[1], scanline[2], scanline[3],
+                           r, g, b);
+        int gray = 255 - FXRGB2GRAY(r, g, b);
+        *scanline++ = bc + (fc - bc) * gray / 255;
+        *scanline++ = bm + (fm - bm) * gray / 255;
+        *scanline++ = by + (fy - by) * gray / 255;
+        *scanline++ = bk + (fk - bk) * gray / 255;
+      }
+    }
+  } else {
+    for (int row = 0; row < m_Height; row++) {
+      uint8_t* scanline = m_pBuffer + row * m_Pitch;
+      int gap = m_bpp / 8 - 2;
+      for (int col = 0; col < m_Width; col++) {
+        int gray = FXRGB2GRAY(scanline[2], scanline[1], scanline[0]);
+        *scanline++ = bb + (fb - bb) * gray / 255;
+        *scanline++ = bg + (fg - bg) * gray / 255;
+        *scanline = br + (fr - br) * gray / 255;
+        scanline += gap;
+      }
+    }
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::CompositeBitmap(
+    int dest_left,
+    int dest_top,
+    int width,
+    int height,
+    const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
+    int src_left,
+    int src_top,
+    int blend_type,
+    const CFX_ClipRgn* pClipRgn,
+    bool bRgbByteOrder,
+    void* pIccTransform) {
+  if (!m_pBuffer) {
+    return false;
+  }
+  ASSERT(!pSrcBitmap->IsAlphaMask());
+  ASSERT(m_bpp >= 8);
+  if (pSrcBitmap->IsAlphaMask() || m_bpp < 8) {
+    return false;
+  }
+  GetOverlapRect(dest_left, dest_top, width, height, pSrcBitmap->GetWidth(),
+                 pSrcBitmap->GetHeight(), src_left, src_top, pClipRgn);
+  if (width == 0 || height == 0) {
+    return true;
+  }
+  CFX_RetainPtr<CFX_DIBitmap> pClipMask;
+  FX_RECT clip_box;
+  if (pClipRgn && pClipRgn->GetType() != CFX_ClipRgn::RectI) {
+    ASSERT(pClipRgn->GetType() == CFX_ClipRgn::MaskF);
+    pClipMask = pClipRgn->GetMask();
+    clip_box = pClipRgn->GetBox();
+  }
+  CFX_ScanlineCompositor compositor;
+  if (!compositor.Init(GetFormat(), pSrcBitmap->GetFormat(), width,
+                       pSrcBitmap->GetPalette(), 0, blend_type,
+                       pClipMask != nullptr, bRgbByteOrder, 0, pIccTransform)) {
+    return false;
+  }
+  int dest_Bpp = m_bpp / 8;
+  int src_Bpp = pSrcBitmap->GetBPP() / 8;
+  bool bRgb = src_Bpp > 1 && !pSrcBitmap->IsCmykImage();
+  CFX_RetainPtr<CFX_DIBitmap> pSrcAlphaMask = pSrcBitmap->m_pAlphaMask;
+  for (int row = 0; row < height; row++) {
+    uint8_t* dest_scan =
+        m_pBuffer + (dest_top + row) * m_Pitch + dest_left * dest_Bpp;
+    const uint8_t* src_scan =
+        pSrcBitmap->GetScanline(src_top + row) + src_left * src_Bpp;
+    const uint8_t* src_scan_extra_alpha =
+        pSrcAlphaMask ? pSrcAlphaMask->GetScanline(src_top + row) + src_left
+                      : nullptr;
+    uint8_t* dst_scan_extra_alpha =
+        m_pAlphaMask
+            ? (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left
+            : nullptr;
+    const uint8_t* clip_scan = nullptr;
+    if (pClipMask) {
+      clip_scan = pClipMask->m_pBuffer +
+                  (dest_top + row - clip_box.top) * pClipMask->m_Pitch +
+                  (dest_left - clip_box.left);
+    }
+    if (bRgb) {
+      compositor.CompositeRgbBitmapLine(dest_scan, src_scan, width, clip_scan,
+                                        src_scan_extra_alpha,
+                                        dst_scan_extra_alpha);
+    } else {
+      compositor.CompositePalBitmapLine(dest_scan, src_scan, src_left, width,
+                                        clip_scan, src_scan_extra_alpha,
+                                        dst_scan_extra_alpha);
+    }
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::CompositeMask(int dest_left,
+                                 int dest_top,
+                                 int width,
+                                 int height,
+                                 const CFX_RetainPtr<CFX_DIBSource>& pMask,
+                                 uint32_t color,
+                                 int src_left,
+                                 int src_top,
+                                 int blend_type,
+                                 const CFX_ClipRgn* pClipRgn,
+                                 bool bRgbByteOrder,
+                                 int alpha_flag,
+                                 void* pIccTransform) {
+  if (!m_pBuffer) {
+    return false;
+  }
+  ASSERT(pMask->IsAlphaMask());
+  ASSERT(m_bpp >= 8);
+  if (!pMask->IsAlphaMask() || m_bpp < 8) {
+    return false;
+  }
+  GetOverlapRect(dest_left, dest_top, width, height, pMask->GetWidth(),
+                 pMask->GetHeight(), src_left, src_top, pClipRgn);
+  if (width == 0 || height == 0) {
+    return true;
+  }
+  int src_alpha =
+      (uint8_t)(alpha_flag >> 8) ? (alpha_flag & 0xff) : FXARGB_A(color);
+  if (src_alpha == 0) {
+    return true;
+  }
+  CFX_RetainPtr<CFX_DIBitmap> pClipMask;
+  FX_RECT clip_box;
+  if (pClipRgn && pClipRgn->GetType() != CFX_ClipRgn::RectI) {
+    ASSERT(pClipRgn->GetType() == CFX_ClipRgn::MaskF);
+    pClipMask = pClipRgn->GetMask();
+    clip_box = pClipRgn->GetBox();
+  }
+  int src_bpp = pMask->GetBPP();
+  int Bpp = GetBPP() / 8;
+  CFX_ScanlineCompositor compositor;
+  if (!compositor.Init(GetFormat(), pMask->GetFormat(), width, nullptr, color,
+                       blend_type, pClipMask != nullptr, bRgbByteOrder,
+                       alpha_flag, pIccTransform)) {
+    return false;
+  }
+  for (int row = 0; row < height; row++) {
+    uint8_t* dest_scan =
+        m_pBuffer + (dest_top + row) * m_Pitch + dest_left * Bpp;
+    const uint8_t* src_scan = pMask->GetScanline(src_top + row);
+    uint8_t* dst_scan_extra_alpha =
+        m_pAlphaMask
+            ? (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left
+            : nullptr;
+    const uint8_t* clip_scan = nullptr;
+    if (pClipMask) {
+      clip_scan = pClipMask->m_pBuffer +
+                  (dest_top + row - clip_box.top) * pClipMask->m_Pitch +
+                  (dest_left - clip_box.left);
+    }
+    if (src_bpp == 1) {
+      compositor.CompositeBitMaskLine(dest_scan, src_scan, src_left, width,
+                                      clip_scan, dst_scan_extra_alpha);
+    } else {
+      compositor.CompositeByteMaskLine(dest_scan, src_scan + src_left, width,
+                                       clip_scan, dst_scan_extra_alpha);
+    }
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::CompositeRect(int left,
+                                 int top,
+                                 int width,
+                                 int height,
+                                 uint32_t color,
+                                 int alpha_flag,
+                                 void* pIccTransform) {
+  if (!m_pBuffer) {
+    return false;
+  }
+  int src_alpha = (alpha_flag >> 8) ? (alpha_flag & 0xff) : FXARGB_A(color);
+  if (src_alpha == 0) {
+    return true;
+  }
+  FX_RECT rect(left, top, left + width, top + height);
+  rect.Intersect(0, 0, m_Width, m_Height);
+  if (rect.IsEmpty()) {
+    return true;
+  }
+  width = rect.Width();
+  uint32_t dst_color;
+  if (alpha_flag >> 8) {
+    dst_color = FXCMYK_TODIB(color);
+  } else {
+    dst_color = FXARGB_TODIB(color);
+  }
+  uint8_t* color_p = (uint8_t*)&dst_color;
+  if (m_bpp == 8) {
+    uint8_t gray = 255;
+    if (!IsAlphaMask()) {
+      if (pIccTransform && CFX_GEModule::Get()->GetCodecModule() &&
+          CFX_GEModule::Get()->GetCodecModule()->GetIccModule()) {
+        CCodec_IccModule* pIccModule =
+            CFX_GEModule::Get()->GetCodecModule()->GetIccModule();
+        pIccModule->TranslateScanline(pIccTransform, &gray, color_p, 1);
+      } else {
+        if (alpha_flag >> 8) {
+          uint8_t r, g, b;
+          AdobeCMYK_to_sRGB1(color_p[0], color_p[1], color_p[2], color_p[3], r,
+                             g, b);
+          gray = FXRGB2GRAY(r, g, b);
+        } else {
+          gray = (uint8_t)FXRGB2GRAY((int)color_p[2], color_p[1], color_p[0]);
+        }
+      }
+      if (IsCmykImage()) {
+        gray = ~gray;
+      }
+    }
+    for (int row = rect.top; row < rect.bottom; row++) {
+      uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left;
+      if (src_alpha == 255) {
+        FXSYS_memset(dest_scan, gray, width);
+      } else {
+        for (int col = 0; col < width; col++) {
+          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, src_alpha);
+          dest_scan++;
+        }
+      }
+    }
+    return true;
+  }
+  if (m_bpp == 1) {
+    ASSERT(!IsCmykImage() && static_cast<uint8_t>(alpha_flag >> 8) == 0);
+    int left_shift = rect.left % 8;
+    int right_shift = rect.right % 8;
+    int new_width = rect.right / 8 - rect.left / 8;
+    int index = 0;
+    if (m_pPalette) {
+      for (int i = 0; i < 2; i++) {
+        if (m_pPalette.get()[i] == color)
+          index = i;
+      }
+    } else {
+      index = (static_cast<uint8_t>(color) == 0xff) ? 1 : 0;
+    }
+    for (int row = rect.top; row < rect.bottom; row++) {
+      uint8_t* dest_scan_top =
+          const_cast<uint8_t*>(GetScanline(row)) + rect.left / 8;
+      uint8_t* dest_scan_top_r =
+          const_cast<uint8_t*>(GetScanline(row)) + rect.right / 8;
+      uint8_t left_flag = *dest_scan_top & (255 << (8 - left_shift));
+      uint8_t right_flag = *dest_scan_top_r & (255 >> right_shift);
+      if (new_width) {
+        FXSYS_memset(dest_scan_top + 1, index ? 255 : 0, new_width - 1);
+        if (!index) {
+          *dest_scan_top &= left_flag;
+          *dest_scan_top_r &= right_flag;
+        } else {
+          *dest_scan_top |= ~left_flag;
+          *dest_scan_top_r |= ~right_flag;
+        }
+      } else {
+        if (!index) {
+          *dest_scan_top &= left_flag | right_flag;
+        } else {
+          *dest_scan_top |= ~(left_flag | right_flag);
+        }
+      }
+    }
+    return true;
+  }
+  ASSERT(m_bpp >= 24);
+  if (m_bpp < 24) {
+    return false;
+  }
+  if (pIccTransform && CFX_GEModule::Get()->GetCodecModule()) {
+    CCodec_IccModule* pIccModule =
+        CFX_GEModule::Get()->GetCodecModule()->GetIccModule();
+    pIccModule->TranslateScanline(pIccTransform, color_p, color_p, 1);
+  } else {
+    if (alpha_flag >> 8 && !IsCmykImage()) {
+      AdobeCMYK_to_sRGB1(FXSYS_GetCValue(color), FXSYS_GetMValue(color),
+                         FXSYS_GetYValue(color), FXSYS_GetKValue(color),
+                         color_p[2], color_p[1], color_p[0]);
+    } else if (!(alpha_flag >> 8) && IsCmykImage()) {
+      return false;
+    }
+  }
+  if (!IsCmykImage()) {
+    color_p[3] = (uint8_t)src_alpha;
+  }
+  int Bpp = m_bpp / 8;
+  bool bAlpha = HasAlpha();
+  bool bArgb = GetFormat() == FXDIB_Argb;
+  if (src_alpha == 255) {
+    for (int row = rect.top; row < rect.bottom; row++) {
+      uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left * Bpp;
+      uint8_t* dest_scan_alpha =
+          m_pAlphaMask ? (uint8_t*)m_pAlphaMask->GetScanline(row) + rect.left
+                       : nullptr;
+      if (dest_scan_alpha) {
+        FXSYS_memset(dest_scan_alpha, 0xff, width);
+      }
+      if (Bpp == 4) {
+        uint32_t* scan = (uint32_t*)dest_scan;
+        for (int col = 0; col < width; col++) {
+          *scan++ = dst_color;
+        }
+      } else {
+        for (int col = 0; col < width; col++) {
+          *dest_scan++ = color_p[0];
+          *dest_scan++ = color_p[1];
+          *dest_scan++ = color_p[2];
+        }
+      }
+    }
+    return true;
+  }
+  for (int row = rect.top; row < rect.bottom; row++) {
+    uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left * Bpp;
+    if (bAlpha) {
+      if (bArgb) {
+        for (int col = 0; col < width; col++) {
+          uint8_t back_alpha = dest_scan[3];
+          if (back_alpha == 0) {
+            FXARGB_SETDIB(dest_scan, FXARGB_MAKE(src_alpha, color_p[2],
+                                                 color_p[1], color_p[0]));
+            dest_scan += 4;
+            continue;
+          }
+          uint8_t dest_alpha =
+              back_alpha + src_alpha - back_alpha * src_alpha / 255;
+          int alpha_ratio = src_alpha * 255 / dest_alpha;
+          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[0], alpha_ratio);
+          dest_scan++;
+          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[1], alpha_ratio);
+          dest_scan++;
+          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[2], alpha_ratio);
+          dest_scan++;
+          *dest_scan++ = dest_alpha;
+        }
+      } else {
+        uint8_t* dest_scan_alpha =
+            (uint8_t*)m_pAlphaMask->GetScanline(row) + rect.left;
+        for (int col = 0; col < width; col++) {
+          uint8_t back_alpha = *dest_scan_alpha;
+          if (back_alpha == 0) {
+            *dest_scan_alpha++ = src_alpha;
+            FXSYS_memcpy(dest_scan, color_p, Bpp);
+            dest_scan += Bpp;
+            continue;
+          }
+          uint8_t dest_alpha =
+              back_alpha + src_alpha - back_alpha * src_alpha / 255;
+          *dest_scan_alpha++ = dest_alpha;
+          int alpha_ratio = src_alpha * 255 / dest_alpha;
+          for (int comps = 0; comps < Bpp; comps++) {
+            *dest_scan =
+                FXDIB_ALPHA_MERGE(*dest_scan, color_p[comps], alpha_ratio);
+            dest_scan++;
+          }
+        }
+      }
+    } else {
+      for (int col = 0; col < width; col++) {
+        for (int comps = 0; comps < Bpp; comps++) {
+          if (comps == 3) {
+            *dest_scan++ = 255;
+            continue;
+          }
+          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[comps], src_alpha);
+          dest_scan++;
+        }
+      }
+    }
+  }
+  return true;
+}
+
+bool CFX_DIBitmap::ConvertFormat(FXDIB_Format dest_format) {
+  FXDIB_Format src_format = GetFormat();
+  if (dest_format == src_format)
+    return true;
+
+  if (dest_format == FXDIB_8bppMask && src_format == FXDIB_8bppRgb &&
+      !m_pPalette) {
+    m_AlphaFlag = 1;
+    return true;
+  }
+  if (dest_format == FXDIB_Argb && src_format == FXDIB_Rgb32) {
+    m_AlphaFlag = 2;
+    for (int row = 0; row < m_Height; row++) {
+      uint8_t* scanline = m_pBuffer + row * m_Pitch + 3;
+      for (int col = 0; col < m_Width; col++) {
+        *scanline = 0xff;
+        scanline += 4;
+      }
+    }
+    return true;
+  }
+  int dest_bpp = dest_format & 0xff;
+  int dest_pitch = (dest_bpp * m_Width + 31) / 32 * 4;
+  uint8_t* dest_buf = FX_TryAlloc(uint8_t, dest_pitch * m_Height + 4);
+  if (!dest_buf) {
+    return false;
+  }
+  CFX_RetainPtr<CFX_DIBitmap> pAlphaMask;
+  if (dest_format == FXDIB_Argb) {
+    FXSYS_memset(dest_buf, 0xff, dest_pitch * m_Height + 4);
+    if (m_pAlphaMask) {
+      for (int row = 0; row < m_Height; row++) {
+        uint8_t* pDstScanline = dest_buf + row * dest_pitch + 3;
+        const uint8_t* pSrcScanline = m_pAlphaMask->GetScanline(row);
+        for (int col = 0; col < m_Width; col++) {
+          *pDstScanline = *pSrcScanline++;
+          pDstScanline += 4;
+        }
+      }
+    }
+  } else if (dest_format & 0x0200) {
+    if (src_format == FXDIB_Argb) {
+      pAlphaMask = CloneAlphaMask();
+      if (!pAlphaMask) {
+        FX_Free(dest_buf);
+        return false;
+      }
+    } else {
+      if (!m_pAlphaMask) {
+        if (!BuildAlphaMask()) {
+          FX_Free(dest_buf);
+          return false;
+        }
+        pAlphaMask = std::move(m_pAlphaMask);
+      } else {
+        pAlphaMask = m_pAlphaMask;
+      }
+    }
+  }
+  bool ret = false;
+  CFX_RetainPtr<CFX_DIBSource> holder(this);
+  std::unique_ptr<uint32_t, FxFreeDeleter> pal_8bpp;
+  ret = ConvertBuffer(dest_format, dest_buf, dest_pitch, m_Width, m_Height,
+                      holder, 0, 0, &pal_8bpp);
+  if (!ret) {
+    FX_Free(dest_buf);
+    return false;
+  }
+  m_pAlphaMask = pAlphaMask;
+  m_pPalette = std::move(pal_8bpp);
+  if (!m_bExtBuf)
+    FX_Free(m_pBuffer);
+  m_bExtBuf = false;
+  m_pBuffer = dest_buf;
+  m_bpp = (uint8_t)dest_format;
+  m_AlphaFlag = (uint8_t)(dest_format >> 8);
+  m_Pitch = dest_pitch;
+  return true;
+}
diff --git a/core/fxge/dib/fx_dib_composite.cpp b/core/fxge/dib/fx_dib_composite.cpp
index 86be539008..e7912e5a1b 100644
--- a/core/fxge/dib/fx_dib_composite.cpp
+++ b/core/fxge/dib/fx_dib_composite.cpp
@@ -10,359 +10,6 @@
 #include "core/fxge/cfx_gemodule.h"
 #include "core/fxge/ge/cfx_cliprgn.h"
 
-bool CFX_DIBitmap::CompositeBitmap(
-    int dest_left,
-    int dest_top,
-    int width,
-    int height,
-    const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
-    int src_left,
-    int src_top,
-    int blend_type,
-    const CFX_ClipRgn* pClipRgn,
-    bool bRgbByteOrder,
-    void* pIccTransform) {
-  if (!m_pBuffer) {
-    return false;
-  }
-  ASSERT(!pSrcBitmap->IsAlphaMask());
-  ASSERT(m_bpp >= 8);
-  if (pSrcBitmap->IsAlphaMask() || m_bpp < 8) {
-    return false;
-  }
-  GetOverlapRect(dest_left, dest_top, width, height, pSrcBitmap->GetWidth(),
-                 pSrcBitmap->GetHeight(), src_left, src_top, pClipRgn);
-  if (width == 0 || height == 0) {
-    return true;
-  }
-  CFX_RetainPtr<CFX_DIBitmap> pClipMask;
-  FX_RECT clip_box;
-  if (pClipRgn && pClipRgn->GetType() != CFX_ClipRgn::RectI) {
-    ASSERT(pClipRgn->GetType() == CFX_ClipRgn::MaskF);
-    pClipMask = pClipRgn->GetMask();
-    clip_box = pClipRgn->GetBox();
-  }
-  CFX_ScanlineCompositor compositor;
-  if (!compositor.Init(GetFormat(), pSrcBitmap->GetFormat(), width,
-                       pSrcBitmap->GetPalette(), 0, blend_type,
-                       pClipMask != nullptr, bRgbByteOrder, 0, pIccTransform)) {
-    return false;
-  }
-  int dest_Bpp = m_bpp / 8;
-  int src_Bpp = pSrcBitmap->GetBPP() / 8;
-  bool bRgb = src_Bpp > 1 && !pSrcBitmap->IsCmykImage();
-  CFX_RetainPtr<CFX_DIBitmap> pSrcAlphaMask = pSrcBitmap->m_pAlphaMask;
-  for (int row = 0; row < height; row++) {
-    uint8_t* dest_scan =
-        m_pBuffer + (dest_top + row) * m_Pitch + dest_left * dest_Bpp;
-    const uint8_t* src_scan =
-        pSrcBitmap->GetScanline(src_top + row) + src_left * src_Bpp;
-    const uint8_t* src_scan_extra_alpha =
-        pSrcAlphaMask ? pSrcAlphaMask->GetScanline(src_top + row) + src_left
-                      : nullptr;
-    uint8_t* dst_scan_extra_alpha =
-        m_pAlphaMask
-            ? (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left
-            : nullptr;
-    const uint8_t* clip_scan = nullptr;
-    if (pClipMask) {
-      clip_scan = pClipMask->m_pBuffer +
-                  (dest_top + row - clip_box.top) * pClipMask->m_Pitch +
-                  (dest_left - clip_box.left);
-    }
-    if (bRgb) {
-      compositor.CompositeRgbBitmapLine(dest_scan, src_scan, width, clip_scan,
-                                        src_scan_extra_alpha,
-                                        dst_scan_extra_alpha);
-    } else {
-      compositor.CompositePalBitmapLine(dest_scan, src_scan, src_left, width,
-                                        clip_scan, src_scan_extra_alpha,
-                                        dst_scan_extra_alpha);
-    }
-  }
-  return true;
-}
-
-bool CFX_DIBitmap::CompositeMask(int dest_left,
-                                 int dest_top,
-                                 int width,
-                                 int height,
-                                 const CFX_RetainPtr<CFX_DIBSource>& pMask,
-                                 uint32_t color,
-                                 int src_left,
-                                 int src_top,
-                                 int blend_type,
-                                 const CFX_ClipRgn* pClipRgn,
-                                 bool bRgbByteOrder,
-                                 int alpha_flag,
-                                 void* pIccTransform) {
-  if (!m_pBuffer) {
-    return false;
-  }
-  ASSERT(pMask->IsAlphaMask());
-  ASSERT(m_bpp >= 8);
-  if (!pMask->IsAlphaMask() || m_bpp < 8) {
-    return false;
-  }
-  GetOverlapRect(dest_left, dest_top, width, height, pMask->GetWidth(),
-                 pMask->GetHeight(), src_left, src_top, pClipRgn);
-  if (width == 0 || height == 0) {
-    return true;
-  }
-  int src_alpha =
-      (uint8_t)(alpha_flag >> 8) ? (alpha_flag & 0xff) : FXARGB_A(color);
-  if (src_alpha == 0) {
-    return true;
-  }
-  CFX_RetainPtr<CFX_DIBitmap> pClipMask;
-  FX_RECT clip_box;
-  if (pClipRgn && pClipRgn->GetType() != CFX_ClipRgn::RectI) {
-    ASSERT(pClipRgn->GetType() == CFX_ClipRgn::MaskF);
-    pClipMask = pClipRgn->GetMask();
-    clip_box = pClipRgn->GetBox();
-  }
-  int src_bpp = pMask->GetBPP();
-  int Bpp = GetBPP() / 8;
-  CFX_ScanlineCompositor compositor;
-  if (!compositor.Init(GetFormat(), pMask->GetFormat(), width, nullptr, color,
-                       blend_type, pClipMask != nullptr, bRgbByteOrder,
-                       alpha_flag, pIccTransform)) {
-    return false;
-  }
-  for (int row = 0; row < height; row++) {
-    uint8_t* dest_scan =
-        m_pBuffer + (dest_top + row) * m_Pitch + dest_left * Bpp;
-    const uint8_t* src_scan = pMask->GetScanline(src_top + row);
-    uint8_t* dst_scan_extra_alpha =
-        m_pAlphaMask
-            ? (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left
-            : nullptr;
-    const uint8_t* clip_scan = nullptr;
-    if (pClipMask) {
-      clip_scan = pClipMask->m_pBuffer +
-                  (dest_top + row - clip_box.top) * pClipMask->m_Pitch +
-                  (dest_left - clip_box.left);
-    }
-    if (src_bpp == 1) {
-      compositor.CompositeBitMaskLine(dest_scan, src_scan, src_left, width,
-                                      clip_scan, dst_scan_extra_alpha);
-    } else {
-      compositor.CompositeByteMaskLine(dest_scan, src_scan + src_left, width,
-                                       clip_scan, dst_scan_extra_alpha);
-    }
-  }
-  return true;
-}
-
-bool CFX_DIBitmap::CompositeRect(int left,
-                                 int top,
-                                 int width,
-                                 int height,
-                                 uint32_t color,
-                                 int alpha_flag,
-                                 void* pIccTransform) {
-  if (!m_pBuffer) {
-    return false;
-  }
-  int src_alpha = (alpha_flag >> 8) ? (alpha_flag & 0xff) : FXARGB_A(color);
-  if (src_alpha == 0) {
-    return true;
-  }
-  FX_RECT rect(left, top, left + width, top + height);
-  rect.Intersect(0, 0, m_Width, m_Height);
-  if (rect.IsEmpty()) {
-    return true;
-  }
-  width = rect.Width();
-  uint32_t dst_color;
-  if (alpha_flag >> 8) {
-    dst_color = FXCMYK_TODIB(color);
-  } else {
-    dst_color = FXARGB_TODIB(color);
-  }
-  uint8_t* color_p = (uint8_t*)&dst_color;
-  if (m_bpp == 8) {
-    uint8_t gray = 255;
-    if (!IsAlphaMask()) {
-      if (pIccTransform && CFX_GEModule::Get()->GetCodecModule() &&
-          CFX_GEModule::Get()->GetCodecModule()->GetIccModule()) {
-        CCodec_IccModule* pIccModule =
-            CFX_GEModule::Get()->GetCodecModule()->GetIccModule();
-        pIccModule->TranslateScanline(pIccTransform, &gray, color_p, 1);
-      } else {
-        if (alpha_flag >> 8) {
-          uint8_t r, g, b;
-          AdobeCMYK_to_sRGB1(color_p[0], color_p[1], color_p[2], color_p[3], r,
-                             g, b);
-          gray = FXRGB2GRAY(r, g, b);
-        } else {
-          gray = (uint8_t)FXRGB2GRAY((int)color_p[2], color_p[1], color_p[0]);
-        }
-      }
-      if (IsCmykImage()) {
-        gray = ~gray;
-      }
-    }
-    for (int row = rect.top; row < rect.bottom; row++) {
-      uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left;
-      if (src_alpha == 255) {
-        FXSYS_memset(dest_scan, gray, width);
-      } else {
-        for (int col = 0; col < width; col++) {
-          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, gray, src_alpha);
-          dest_scan++;
-        }
-      }
-    }
-    return true;
-  }
-  if (m_bpp == 1) {
-    ASSERT(!IsCmykImage() && (uint8_t)(alpha_flag >> 8) == 0);
-    int left_shift = rect.left % 8;
-    int right_shift = rect.right % 8;
-    int new_width = rect.right / 8 - rect.left / 8;
-    int index = 0;
-    if (m_pPalette) {
-      for (int i = 0; i < 2; i++) {
-        if (m_pPalette.get()[i] == color) {
-          index = i;
-        }
-      }
-    } else {
-      index = ((uint8_t)color == 0xff) ? 1 : 0;
-    }
-    for (int row = rect.top; row < rect.bottom; row++) {
-      uint8_t* dest_scan_top = (uint8_t*)GetScanline(row) + rect.left / 8;
-      uint8_t* dest_scan_top_r = (uint8_t*)GetScanline(row) + rect.right / 8;
-      uint8_t left_flag = *dest_scan_top & (255 << (8 - left_shift));
-      uint8_t right_flag = *dest_scan_top_r & (255 >> right_shift);
-      if (new_width) {
-        FXSYS_memset(dest_scan_top + 1, index ? 255 : 0, new_width - 1);
-        if (!index) {
-          *dest_scan_top &= left_flag;
-          *dest_scan_top_r &= right_flag;
-        } else {
-          *dest_scan_top |= ~left_flag;
-          *dest_scan_top_r |= ~right_flag;
-        }
-      } else {
-        if (!index) {
-          *dest_scan_top &= left_flag | right_flag;
-        } else {
-          *dest_scan_top |= ~(left_flag | right_flag);
-        }
-      }
-    }
-    return true;
-  }
-  ASSERT(m_bpp >= 24);
-  if (m_bpp < 24) {
-    return false;
-  }
-  if (pIccTransform && CFX_GEModule::Get()->GetCodecModule()) {
-    CCodec_IccModule* pIccModule =
-        CFX_GEModule::Get()->GetCodecModule()->GetIccModule();
-    pIccModule->TranslateScanline(pIccTransform, color_p, color_p, 1);
-  } else {
-    if (alpha_flag >> 8 && !IsCmykImage()) {
-      AdobeCMYK_to_sRGB1(FXSYS_GetCValue(color), FXSYS_GetMValue(color),
-                         FXSYS_GetYValue(color), FXSYS_GetKValue(color),
-                         color_p[2], color_p[1], color_p[0]);
-    } else if (!(alpha_flag >> 8) && IsCmykImage()) {
-      return false;
-    }
-  }
-  if (!IsCmykImage()) {
-    color_p[3] = (uint8_t)src_alpha;
-  }
-  int Bpp = m_bpp / 8;
-  bool bAlpha = HasAlpha();
-  bool bArgb = GetFormat() == FXDIB_Argb;
-  if (src_alpha == 255) {
-    for (int row = rect.top; row < rect.bottom; row++) {
-      uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left * Bpp;
-      uint8_t* dest_scan_alpha =
-          m_pAlphaMask ? (uint8_t*)m_pAlphaMask->GetScanline(row) + rect.left
-                       : nullptr;
-      if (dest_scan_alpha) {
-        FXSYS_memset(dest_scan_alpha, 0xff, width);
-      }
-      if (Bpp == 4) {
-        uint32_t* scan = (uint32_t*)dest_scan;
-        for (int col = 0; col < width; col++) {
-          *scan++ = dst_color;
-        }
-      } else {
-        for (int col = 0; col < width; col++) {
-          *dest_scan++ = color_p[0];
-          *dest_scan++ = color_p[1];
-          *dest_scan++ = color_p[2];
-        }
-      }
-    }
-    return true;
-  }
-  for (int row = rect.top; row < rect.bottom; row++) {
-    uint8_t* dest_scan = m_pBuffer + row * m_Pitch + rect.left * Bpp;
-    if (bAlpha) {
-      if (bArgb) {
-        for (int col = 0; col < width; col++) {
-          uint8_t back_alpha = dest_scan[3];
-          if (back_alpha == 0) {
-            FXARGB_SETDIB(dest_scan, FXARGB_MAKE(src_alpha, color_p[2],
-                                                 color_p[1], color_p[0]));
-            dest_scan += 4;
-            continue;
-          }
-          uint8_t dest_alpha =
-              back_alpha + src_alpha - back_alpha * src_alpha / 255;
-          int alpha_ratio = src_alpha * 255 / dest_alpha;
-          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[0], alpha_ratio);
-          dest_scan++;
-          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[1], alpha_ratio);
-          dest_scan++;
-          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[2], alpha_ratio);
-          dest_scan++;
-          *dest_scan++ = dest_alpha;
-        }
-      } else {
-        uint8_t* dest_scan_alpha =
-            (uint8_t*)m_pAlphaMask->GetScanline(row) + rect.left;
-        for (int col = 0; col < width; col++) {
-          uint8_t back_alpha = *dest_scan_alpha;
-          if (back_alpha == 0) {
-            *dest_scan_alpha++ = src_alpha;
-            FXSYS_memcpy(dest_scan, color_p, Bpp);
-            dest_scan += Bpp;
-            continue;
-          }
-          uint8_t dest_alpha =
-              back_alpha + src_alpha - back_alpha * src_alpha / 255;
-          *dest_scan_alpha++ = dest_alpha;
-          int alpha_ratio = src_alpha * 255 / dest_alpha;
-          for (int comps = 0; comps < Bpp; comps++) {
-            *dest_scan =
-                FXDIB_ALPHA_MERGE(*dest_scan, color_p[comps], alpha_ratio);
-            dest_scan++;
-          }
-        }
-      }
-    } else {
-      for (int col = 0; col < width; col++) {
-        for (int comps = 0; comps < Bpp; comps++) {
-          if (comps == 3) {
-            *dest_scan++ = 255;
-            continue;
-          }
-          *dest_scan = FXDIB_ALPHA_MERGE(*dest_scan, color_p[comps], src_alpha);
-          dest_scan++;
-        }
-      }
-    }
-  }
-  return true;
-}
-
 CFX_BitmapComposer::CFX_BitmapComposer() {
   m_pScanlineV = nullptr;
   m_pScanlineAlphaV = nullptr;
diff --git a/core/fxge/dib/fx_dib_convert.cpp b/core/fxge/dib/fx_dib_convert.cpp
index 419e6547e4..d3cff24326 100644
--- a/core/fxge/dib/fx_dib_convert.cpp
+++ b/core/fxge/dib/fx_dib_convert.cpp
@@ -12,6 +12,8 @@
 #include "core/fxge/fx_dib.h"
 #include "third_party/base/ptr_util.h"
 
+namespace {
+
 class CFX_Palette {
  public:
   CFX_Palette();
@@ -657,6 +659,8 @@ bool ConvertBuffer_32bppCmyk2Rgb32(
   return true;
 }
 
+}  // namespace
+
 bool ConvertBuffer(FXDIB_Format dest_format,
                    uint8_t* dest_buf,
                    int dest_pitch,
@@ -786,83 +790,3 @@ bool ConvertBuffer(FXDIB_Format dest_format,
       return false;
   }
 }
-
-bool CFX_DIBitmap::ConvertFormat(FXDIB_Format dest_format) {
-  FXDIB_Format src_format = GetFormat();
-  if (dest_format == src_format)
-    return true;
-
-  if (dest_format == FXDIB_8bppMask && src_format == FXDIB_8bppRgb &&
-      !m_pPalette) {
-    m_AlphaFlag = 1;
-    return true;
-  }
-  if (dest_format == FXDIB_Argb && src_format == FXDIB_Rgb32) {
-    m_AlphaFlag = 2;
-    for (int row = 0; row < m_Height; row++) {
-      uint8_t* scanline = m_pBuffer + row * m_Pitch + 3;
-      for (int col = 0; col < m_Width; col++) {
-        *scanline = 0xff;
-        scanline += 4;
-      }
-    }
-    return true;
-  }
-  int dest_bpp = dest_format & 0xff;
-  int dest_pitch = (dest_bpp * m_Width + 31) / 32 * 4;
-  uint8_t* dest_buf = FX_TryAlloc(uint8_t, dest_pitch * m_Height + 4);
-  if (!dest_buf) {
-    return false;
-  }
-  CFX_RetainPtr<CFX_DIBitmap> pAlphaMask;
-  if (dest_format == FXDIB_Argb) {
-    FXSYS_memset(dest_buf, 0xff, dest_pitch * m_Height + 4);
-    if (m_pAlphaMask) {
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* pDstScanline = dest_buf + row * dest_pitch + 3;
-        const uint8_t* pSrcScanline = m_pAlphaMask->GetScanline(row);
-        for (int col = 0; col < m_Width; col++) {
-          *pDstScanline = *pSrcScanline++;
-          pDstScanline += 4;
-        }
-      }
-    }
-  } else if (dest_format & 0x0200) {
-    if (src_format == FXDIB_Argb) {
-      pAlphaMask = CloneAlphaMask();
-      if (!pAlphaMask) {
-        FX_Free(dest_buf);
-        return false;
-      }
-    } else {
-      if (!m_pAlphaMask) {
-        if (!BuildAlphaMask()) {
-          FX_Free(dest_buf);
-          return false;
-        }
-        pAlphaMask = std::move(m_pAlphaMask);
-      } else {
-        pAlphaMask = m_pAlphaMask;
-      }
-    }
-  }
-  bool ret = false;
-  CFX_RetainPtr<CFX_DIBSource> holder(this);
-  std::unique_ptr<uint32_t, FxFreeDeleter> pal_8bpp;
-  ret = ConvertBuffer(dest_format, dest_buf, dest_pitch, m_Width, m_Height,
-                      holder, 0, 0, &pal_8bpp);
-  if (!ret) {
-    FX_Free(dest_buf);
-    return false;
-  }
-  m_pAlphaMask = pAlphaMask;
-  m_pPalette = std::move(pal_8bpp);
-  if (!m_bExtBuf)
-    FX_Free(m_pBuffer);
-  m_bExtBuf = false;
-  m_pBuffer = dest_buf;
-  m_bpp = (uint8_t)dest_format;
-  m_AlphaFlag = (uint8_t)(dest_format >> 8);
-  m_Pitch = dest_pitch;
-  return true;
-}
diff --git a/core/fxge/dib/fx_dib_main.cpp b/core/fxge/dib/fx_dib_main.cpp
index 2ea3eeab3e..f3716c36b1 100644
--- a/core/fxge/dib/fx_dib_main.cpp
+++ b/core/fxge/dib/fx_dib_main.cpp
@@ -6,18 +6,9 @@
 
 #include "core/fxge/fx_dib.h"
 
-#include <limits.h>
-
-#include <algorithm>
-#include <memory>
 #include <utility>
 
-#include "core/fxcodec/fx_codec.h"
-#include "core/fxcrt/cfx_maybe_owned.h"
-#include "core/fxge/cfx_gemodule.h"
-#include "core/fxge/dib/cfx_filtereddib.h"
 #include "core/fxge/dib/dib_int.h"
-#include "core/fxge/ge/cfx_cliprgn.h"
 #include "third_party/base/ptr_util.h"
 
 const int16_t SDP_Table[513] = {
@@ -106,1045 +97,6 @@ uint32_t ArgbEncode(int a, FX_COLORREF rgb) {
                      FXSYS_GetBValue(rgb));
 }
 
-CFX_DIBitmap::CFX_DIBitmap() {
-  m_bExtBuf = false;
-  m_pBuffer = nullptr;
-  m_pPalette = nullptr;
-#ifdef _SKIA_SUPPORT_PATHS_
-  m_nFormat = Format::kCleared;
-#endif
-}
-
-#define _MAX_OOM_LIMIT_ 12000000
-bool CFX_DIBitmap::Create(int width,
-                          int height,
-                          FXDIB_Format format,
-                          uint8_t* pBuffer,
-                          int pitch) {
-  m_pBuffer = nullptr;
-  m_bpp = (uint8_t)format;
-  m_AlphaFlag = (uint8_t)(format >> 8);
-  m_Width = m_Height = m_Pitch = 0;
-  if (width <= 0 || height <= 0 || pitch < 0) {
-    return false;
-  }
-  if ((INT_MAX - 31) / width < (format & 0xff)) {
-    return false;
-  }
-  if (!pitch) {
-    pitch = (width * (format & 0xff) + 31) / 32 * 4;
-  }
-  if ((1 << 30) / pitch < height) {
-    return false;
-  }
-  if (pBuffer) {
-    m_pBuffer = pBuffer;
-    m_bExtBuf = true;
-  } else {
-    int size = pitch * height + 4;
-    int oomlimit = _MAX_OOM_LIMIT_;
-    if (oomlimit >= 0 && size >= oomlimit) {
-      m_pBuffer = FX_TryAlloc(uint8_t, size);
-      if (!m_pBuffer) {
-        return false;
-      }
-    } else {
-      m_pBuffer = FX_Alloc(uint8_t, size);
-    }
-  }
-  m_Width = width;
-  m_Height = height;
-  m_Pitch = pitch;
-  if (HasAlpha() && format != FXDIB_Argb) {
-    bool ret = true;
-    ret = BuildAlphaMask();
-    if (!ret) {
-      if (!m_bExtBuf) {
-        FX_Free(m_pBuffer);
-        m_pBuffer = nullptr;
-        m_Width = m_Height = m_Pitch = 0;
-        return false;
-      }
-    }
-  }
-  return true;
-}
-
-bool CFX_DIBitmap::Copy(const CFX_RetainPtr<CFX_DIBSource>& pSrc) {
-  if (m_pBuffer)
-    return false;
-
-  if (!Create(pSrc->GetWidth(), pSrc->GetHeight(), pSrc->GetFormat()))
-    return false;
-
-  SetPalette(pSrc->GetPalette());
-  SetAlphaMask(pSrc->m_pAlphaMask);
-  for (int row = 0; row < pSrc->GetHeight(); row++)
-    FXSYS_memcpy(m_pBuffer + row * m_Pitch, pSrc->GetScanline(row), m_Pitch);
-
-  return true;
-}
-
-CFX_DIBitmap::~CFX_DIBitmap() {
-  if (!m_bExtBuf)
-    FX_Free(m_pBuffer);
-
-  m_pBuffer = nullptr;
-}
-
-uint8_t* CFX_DIBitmap::GetBuffer() const {
-  return m_pBuffer;
-}
-
-const uint8_t* CFX_DIBitmap::GetScanline(int line) const {
-  return m_pBuffer ? m_pBuffer + line * m_Pitch : nullptr;
-}
-
-void CFX_DIBitmap::TakeOver(CFX_RetainPtr<CFX_DIBitmap>&& pSrcBitmap) {
-  if (!m_bExtBuf)
-    FX_Free(m_pBuffer);
-
-  m_pBuffer = pSrcBitmap->m_pBuffer;
-  m_pPalette = std::move(pSrcBitmap->m_pPalette);
-  m_pAlphaMask = pSrcBitmap->m_pAlphaMask;
-  pSrcBitmap->m_pBuffer = nullptr;
-  pSrcBitmap->m_pAlphaMask = nullptr;
-  m_bpp = pSrcBitmap->m_bpp;
-  m_bExtBuf = pSrcBitmap->m_bExtBuf;
-  m_AlphaFlag = pSrcBitmap->m_AlphaFlag;
-  m_Width = pSrcBitmap->m_Width;
-  m_Height = pSrcBitmap->m_Height;
-  m_Pitch = pSrcBitmap->m_Pitch;
-}
-
-void CFX_DIBitmap::Clear(uint32_t color) {
-  if (!m_pBuffer) {
-    return;
-  }
-  switch (GetFormat()) {
-    case FXDIB_1bppMask:
-      FXSYS_memset(m_pBuffer, (color & 0xff000000) ? 0xff : 0,
-                   m_Pitch * m_Height);
-      break;
-    case FXDIB_1bppRgb: {
-      int index = FindPalette(color);
-      FXSYS_memset(m_pBuffer, index ? 0xff : 0, m_Pitch * m_Height);
-      break;
-    }
-    case FXDIB_8bppMask:
-      FXSYS_memset(m_pBuffer, color >> 24, m_Pitch * m_Height);
-      break;
-    case FXDIB_8bppRgb: {
-      int index = FindPalette(color);
-      FXSYS_memset(m_pBuffer, index, m_Pitch * m_Height);
-      break;
-    }
-    case FXDIB_Rgb:
-    case FXDIB_Rgba: {
-      int a, r, g, b;
-      ArgbDecode(color, a, r, g, b);
-      if (r == g && g == b) {
-        FXSYS_memset(m_pBuffer, r, m_Pitch * m_Height);
-      } else {
-        int byte_pos = 0;
-        for (int col = 0; col < m_Width; col++) {
-          m_pBuffer[byte_pos++] = b;
-          m_pBuffer[byte_pos++] = g;
-          m_pBuffer[byte_pos++] = r;
-        }
-        for (int row = 1; row < m_Height; row++) {
-          FXSYS_memcpy(m_pBuffer + row * m_Pitch, m_pBuffer, m_Pitch);
-        }
-      }
-      break;
-    }
-    case FXDIB_Rgb32:
-    case FXDIB_Argb: {
-      color = IsCmykImage() ? FXCMYK_TODIB(color) : FXARGB_TODIB(color);
-#ifdef _SKIA_SUPPORT_
-      if (FXDIB_Rgb32 == GetFormat() && !IsCmykImage()) {
-        color |= 0xFF000000;
-      }
-#endif
-      for (int i = 0; i < m_Width; i++) {
-        ((uint32_t*)m_pBuffer)[i] = color;
-      }
-      for (int row = 1; row < m_Height; row++) {
-        FXSYS_memcpy(m_pBuffer + row * m_Pitch, m_pBuffer, m_Pitch);
-      }
-      break;
-    }
-    default:
-      break;
-  }
-}
-
-bool CFX_DIBitmap::TransferBitmap(
-    int dest_left,
-    int dest_top,
-    int width,
-    int height,
-    const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
-    int src_left,
-    int src_top) {
-  if (!m_pBuffer)
-    return false;
-
-  GetOverlapRect(dest_left, dest_top, width, height, pSrcBitmap->GetWidth(),
-                 pSrcBitmap->GetHeight(), src_left, src_top, nullptr);
-  if (width == 0 || height == 0)
-    return true;
-
-  FXDIB_Format dest_format = GetFormat();
-  FXDIB_Format src_format = pSrcBitmap->GetFormat();
-  if (dest_format == src_format) {
-    if (GetBPP() == 1) {
-      for (int row = 0; row < height; row++) {
-        uint8_t* dest_scan = m_pBuffer + (dest_top + row) * m_Pitch;
-        const uint8_t* src_scan = pSrcBitmap->GetScanline(src_top + row);
-        for (int col = 0; col < width; col++) {
-          if (src_scan[(src_left + col) / 8] &
-              (1 << (7 - (src_left + col) % 8))) {
-            dest_scan[(dest_left + col) / 8] |= 1
-                                                << (7 - (dest_left + col) % 8);
-          } else {
-            dest_scan[(dest_left + col) / 8] &=
-                ~(1 << (7 - (dest_left + col) % 8));
-          }
-        }
-      }
-    } else {
-      int Bpp = GetBPP() / 8;
-      for (int row = 0; row < height; row++) {
-        uint8_t* dest_scan =
-            m_pBuffer + (dest_top + row) * m_Pitch + dest_left * Bpp;
-        const uint8_t* src_scan =
-            pSrcBitmap->GetScanline(src_top + row) + src_left * Bpp;
-        FXSYS_memcpy(dest_scan, src_scan, width * Bpp);
-      }
-    }
-  } else {
-    if (m_pPalette)
-      return false;
-
-    if (m_bpp == 8)
-      dest_format = FXDIB_8bppMask;
-
-    uint8_t* dest_buf =
-        m_pBuffer + dest_top * m_Pitch + dest_left * GetBPP() / 8;
-    std::unique_ptr<uint32_t, FxFreeDeleter> d_plt;
-    if (!ConvertBuffer(dest_format, dest_buf, m_Pitch, width, height,
-                       pSrcBitmap, src_left, src_top, &d_plt)) {
-      return false;
-    }
-  }
-  return true;
-}
-
-bool CFX_DIBitmap::TransferMask(int dest_left,
-                                int dest_top,
-                                int width,
-                                int height,
-                                const CFX_RetainPtr<CFX_DIBSource>& pMask,
-                                uint32_t color,
-                                int src_left,
-                                int src_top,
-                                int alpha_flag,
-                                void* pIccTransform) {
-  if (!m_pBuffer) {
-    return false;
-  }
-  ASSERT(HasAlpha() && (m_bpp >= 24));
-  ASSERT(pMask->IsAlphaMask());
-  if (!HasAlpha() || !pMask->IsAlphaMask() || m_bpp < 24) {
-    return false;
-  }
-  GetOverlapRect(dest_left, dest_top, width, height, pMask->GetWidth(),
-                 pMask->GetHeight(), src_left, src_top, nullptr);
-  if (width == 0 || height == 0) {
-    return true;
-  }
-  int src_bpp = pMask->GetBPP();
-  int alpha;
-  uint32_t dst_color;
-  if (alpha_flag >> 8) {
-    alpha = alpha_flag & 0xff;
-    dst_color = FXCMYK_TODIB(color);
-  } else {
-    alpha = FXARGB_A(color);
-    dst_color = FXARGB_TODIB(color);
-  }
-  uint8_t* color_p = (uint8_t*)&dst_color;
-  if (pIccTransform && CFX_GEModule::Get()->GetCodecModule() &&
-      CFX_GEModule::Get()->GetCodecModule()->GetIccModule()) {
-    CCodec_IccModule* pIccModule =
-        CFX_GEModule::Get()->GetCodecModule()->GetIccModule();
-    pIccModule->TranslateScanline(pIccTransform, color_p, color_p, 1);
-  } else {
-    if (alpha_flag >> 8 && !IsCmykImage()) {
-      AdobeCMYK_to_sRGB1(FXSYS_GetCValue(color), FXSYS_GetMValue(color),
-                         FXSYS_GetYValue(color), FXSYS_GetKValue(color),
-                         color_p[2], color_p[1], color_p[0]);
-    } else if (!(alpha_flag >> 8) && IsCmykImage()) {
-      return false;
-    }
-  }
-  if (!IsCmykImage()) {
-    color_p[3] = (uint8_t)alpha;
-  }
-  if (GetFormat() == FXDIB_Argb) {
-    for (int row = 0; row < height; row++) {
-      uint32_t* dest_pos =
-          (uint32_t*)(m_pBuffer + (dest_top + row) * m_Pitch + dest_left * 4);
-      const uint8_t* src_scan = pMask->GetScanline(src_top + row);
-      if (src_bpp == 1) {
-        for (int col = 0; col < width; col++) {
-          int src_bitpos = src_left + col;
-          if (src_scan[src_bitpos / 8] & (1 << (7 - src_bitpos % 8))) {
-            *dest_pos = dst_color;
-          } else {
-            *dest_pos = 0;
-          }
-          dest_pos++;
-        }
-      } else {
-        src_scan += src_left;
-        dst_color = FXARGB_TODIB(dst_color);
-        dst_color &= 0xffffff;
-        for (int col = 0; col < width; col++) {
-          FXARGB_SETDIB(dest_pos++,
-                        dst_color | ((alpha * (*src_scan++) / 255) << 24));
-        }
-      }
-    }
-  } else {
-    int comps = m_bpp / 8;
-    for (int row = 0; row < height; row++) {
-      uint8_t* dest_color_pos =
-          m_pBuffer + (dest_top + row) * m_Pitch + dest_left * comps;
-      uint8_t* dest_alpha_pos =
-          (uint8_t*)m_pAlphaMask->GetScanline(dest_top + row) + dest_left;
-      const uint8_t* src_scan = pMask->GetScanline(src_top + row);
-      if (src_bpp == 1) {
-        for (int col = 0; col < width; col++) {
-          int src_bitpos = src_left + col;
-          if (src_scan[src_bitpos / 8] & (1 << (7 - src_bitpos % 8))) {
-            FXSYS_memcpy(dest_color_pos, color_p, comps);
-            *dest_alpha_pos = 0xff;
-          } else {
-            FXSYS_memset(dest_color_pos, 0, comps);
-            *dest_alpha_pos = 0;
-          }
-          dest_color_pos += comps;
-          dest_alpha_pos++;
-        }
-      } else {
-        src_scan += src_left;
-        for (int col = 0; col < width; col++) {
-          FXSYS_memcpy(dest_color_pos, color_p, comps);
-          dest_color_pos += comps;
-          *dest_alpha_pos++ = (alpha * (*src_scan++) / 255);
-        }
-      }
-    }
-  }
-  return true;
-}
-
-const int g_ChannelOffset[] = {0, 2, 1, 0, 0, 1, 2, 3, 3};
-bool CFX_DIBitmap::LoadChannel(FXDIB_Channel destChannel,
-                               const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
-                               FXDIB_Channel srcChannel) {
-  if (!m_pBuffer)
-    return false;
-
-  CFX_RetainPtr<CFX_DIBSource> pSrcClone = pSrcBitmap;
-  int srcOffset;
-  if (srcChannel == FXDIB_Alpha) {
-    if (!pSrcBitmap->HasAlpha() && !pSrcBitmap->IsAlphaMask())
-      return false;
-
-    if (pSrcBitmap->GetBPP() == 1) {
-      pSrcClone = pSrcBitmap->CloneConvert(FXDIB_8bppMask);
-      if (!pSrcClone)
-        return false;
-    }
-    srcOffset = pSrcBitmap->GetFormat() == FXDIB_Argb ? 3 : 0;
-  } else {
-    if (pSrcBitmap->IsAlphaMask())
-      return false;
-
-    if (pSrcBitmap->GetBPP() < 24) {
-      if (pSrcBitmap->IsCmykImage()) {
-        pSrcClone = pSrcBitmap->CloneConvert(static_cast<FXDIB_Format>(
-            (pSrcBitmap->GetFormat() & 0xff00) | 0x20));
-      } else {
-        pSrcClone = pSrcBitmap->CloneConvert(static_cast<FXDIB_Format>(
-            (pSrcBitmap->GetFormat() & 0xff00) | 0x18));
-      }
-      if (!pSrcClone)
-        return false;
-    }
-    srcOffset = g_ChannelOffset[srcChannel];
-  }
-  int destOffset = 0;
-  if (destChannel == FXDIB_Alpha) {
-    if (IsAlphaMask()) {
-      if (!ConvertFormat(FXDIB_8bppMask))
-        return false;
-    } else {
-      if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb))
-        return false;
-
-      if (GetFormat() == FXDIB_Argb)
-        destOffset = 3;
-    }
-  } else {
-    if (IsAlphaMask())
-      return false;
-
-    if (GetBPP() < 24) {
-      if (HasAlpha()) {
-        if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb))
-          return false;
-#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
-      } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb32)) {
-#else
-      } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb)) {
-#endif
-        return false;
-      }
-    }
-    destOffset = g_ChannelOffset[destChannel];
-  }
-  if (srcChannel == FXDIB_Alpha && pSrcClone->m_pAlphaMask) {
-    CFX_RetainPtr<CFX_DIBSource> pAlphaMask = pSrcClone->m_pAlphaMask;
-    if (pSrcClone->GetWidth() != m_Width ||
-        pSrcClone->GetHeight() != m_Height) {
-      if (pAlphaMask) {
-        pAlphaMask = pAlphaMask->StretchTo(m_Width, m_Height);
-        if (!pAlphaMask)
-          return false;
-      }
-    }
-    pSrcClone = std::move(pAlphaMask);
-    srcOffset = 0;
-  } else if (pSrcClone->GetWidth() != m_Width ||
-             pSrcClone->GetHeight() != m_Height) {
-    CFX_RetainPtr<CFX_DIBitmap> pSrcMatched =
-        pSrcClone->StretchTo(m_Width, m_Height);
-    if (!pSrcMatched)
-      return false;
-
-    pSrcClone = std::move(pSrcMatched);
-  }
-  CFX_RetainPtr<CFX_DIBitmap> pDst(this);
-  if (destChannel == FXDIB_Alpha && m_pAlphaMask) {
-    pDst = m_pAlphaMask;
-    destOffset = 0;
-  }
-  int srcBytes = pSrcClone->GetBPP() / 8;
-  int destBytes = pDst->GetBPP() / 8;
-  for (int row = 0; row < m_Height; row++) {
-    uint8_t* dest_pos = (uint8_t*)pDst->GetScanline(row) + destOffset;
-    const uint8_t* src_pos = pSrcClone->GetScanline(row) + srcOffset;
-    for (int col = 0; col < m_Width; col++) {
-      *dest_pos = *src_pos;
-      dest_pos += destBytes;
-      src_pos += srcBytes;
-    }
-  }
-  return true;
-}
-
-bool CFX_DIBitmap::LoadChannel(FXDIB_Channel destChannel, int value) {
-  if (!m_pBuffer) {
-    return false;
-  }
-  int destOffset;
-  if (destChannel == FXDIB_Alpha) {
-    if (IsAlphaMask()) {
-      if (!ConvertFormat(FXDIB_8bppMask)) {
-        return false;
-      }
-      destOffset = 0;
-    } else {
-      destOffset = 0;
-      if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb)) {
-        return false;
-      }
-      if (GetFormat() == FXDIB_Argb) {
-        destOffset = 3;
-      }
-    }
-  } else {
-    if (IsAlphaMask()) {
-      return false;
-    }
-    if (GetBPP() < 24) {
-      if (HasAlpha()) {
-        if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyka : FXDIB_Argb)) {
-          return false;
-        }
-#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
-      } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb)) {
-#else
-      } else if (!ConvertFormat(IsCmykImage() ? FXDIB_Cmyk : FXDIB_Rgb32)) {
-#endif
-        return false;
-      }
-    }
-    destOffset = g_ChannelOffset[destChannel];
-  }
-  int Bpp = GetBPP() / 8;
-  if (Bpp == 1) {
-    FXSYS_memset(m_pBuffer, value, m_Height * m_Pitch);
-    return true;
-  }
-  if (destChannel == FXDIB_Alpha && m_pAlphaMask) {
-    FXSYS_memset(m_pAlphaMask->GetBuffer(), value,
-                 m_pAlphaMask->GetHeight() * m_pAlphaMask->GetPitch());
-    return true;
-  }
-  for (int row = 0; row < m_Height; row++) {
-    uint8_t* scan_line = m_pBuffer + row * m_Pitch + destOffset;
-    for (int col = 0; col < m_Width; col++) {
-      *scan_line = value;
-      scan_line += Bpp;
-    }
-  }
-  return true;
-}
-
-bool CFX_DIBitmap::MultiplyAlpha(
-    const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap) {
-  if (!m_pBuffer)
-    return false;
-
-  ASSERT(pSrcBitmap->IsAlphaMask());
-  if (!pSrcBitmap->IsAlphaMask())
-    return false;
-
-  if (!IsAlphaMask() && !HasAlpha())
-    return LoadChannel(FXDIB_Alpha, pSrcBitmap, FXDIB_Alpha);
-
-  CFX_RetainPtr<CFX_DIBitmap> pSrcClone = pSrcBitmap.As<CFX_DIBitmap>();
-  if (pSrcBitmap->GetWidth() != m_Width ||
-      pSrcBitmap->GetHeight() != m_Height) {
-    pSrcClone = pSrcBitmap->StretchTo(m_Width, m_Height);
-    if (!pSrcClone)
-      return false;
-  }
-  if (IsAlphaMask()) {
-    if (!ConvertFormat(FXDIB_8bppMask))
-      return false;
-
-    for (int row = 0; row < m_Height; row++) {
-      uint8_t* dest_scan = m_pBuffer + m_Pitch * row;
-      uint8_t* src_scan = pSrcClone->m_pBuffer + pSrcClone->m_Pitch * row;
-      if (pSrcClone->GetBPP() == 1) {
-        for (int col = 0; col < m_Width; col++) {
-          if (!((1 << (7 - col % 8)) & src_scan[col / 8]))
-            dest_scan[col] = 0;
-        }
-      } else {
-        for (int col = 0; col < m_Width; col++) {
-          *dest_scan = (*dest_scan) * src_scan[col] / 255;
-          dest_scan++;
-        }
-      }
-    }
-  } else {
-    if (GetFormat() == FXDIB_Argb) {
-      if (pSrcClone->GetBPP() == 1)
-        return false;
-
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* dest_scan = m_pBuffer + m_Pitch * row + 3;
-        uint8_t* src_scan = pSrcClone->m_pBuffer + pSrcClone->m_Pitch * row;
-        for (int col = 0; col < m_Width; col++) {
-          *dest_scan = (*dest_scan) * src_scan[col] / 255;
-          dest_scan += 4;
-        }
-      }
-    } else {
-      m_pAlphaMask->MultiplyAlpha(pSrcClone);
-    }
-  }
-  return true;
-}
-
-bool CFX_DIBitmap::GetGrayData(void* pIccTransform) {
-  if (!m_pBuffer) {
-    return false;
-  }
-  switch (GetFormat()) {
-    case FXDIB_1bppRgb: {
-      if (!m_pPalette)
-        return false;
-
-      uint8_t gray[2];
-      for (int i = 0; i < 2; i++) {
-        int r = static_cast<uint8_t>(m_pPalette.get()[i] >> 16);
-        int g = static_cast<uint8_t>(m_pPalette.get()[i] >> 8);
-        int b = static_cast<uint8_t>(m_pPalette.get()[i]);
-        gray[i] = static_cast<uint8_t>(FXRGB2GRAY(r, g, b));
-      }
-      auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
-      if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask))
-        return false;
-
-      FXSYS_memset(pMask->GetBuffer(), gray[0], pMask->GetPitch() * m_Height);
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* src_pos = m_pBuffer + row * m_Pitch;
-        uint8_t* dest_pos = (uint8_t*)pMask->GetScanline(row);
-        for (int col = 0; col < m_Width; col++) {
-          if (src_pos[col / 8] & (1 << (7 - col % 8))) {
-            *dest_pos = gray[1];
-          }
-          dest_pos++;
-        }
-      }
-      TakeOver(std::move(pMask));
-      break;
-    }
-    case FXDIB_8bppRgb: {
-      if (!m_pPalette)
-        return false;
-
-      uint8_t gray[256];
-      for (int i = 0; i < 256; i++) {
-        int r = static_cast<uint8_t>(m_pPalette.get()[i] >> 16);
-        int g = static_cast<uint8_t>(m_pPalette.get()[i] >> 8);
-        int b = static_cast<uint8_t>(m_pPalette.get()[i]);
-        gray[i] = static_cast<uint8_t>(FXRGB2GRAY(r, g, b));
-      }
-      auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
-      if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask))
-        return false;
-
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch();
-        uint8_t* src_pos = m_pBuffer + row * m_Pitch;
-        for (int col = 0; col < m_Width; col++) {
-          *dest_pos++ = gray[*src_pos++];
-        }
-      }
-      TakeOver(std::move(pMask));
-      break;
-    }
-    case FXDIB_Rgb: {
-      auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
-      if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask))
-        return false;
-
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* src_pos = m_pBuffer + row * m_Pitch;
-        uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch();
-        for (int col = 0; col < m_Width; col++) {
-          *dest_pos++ = FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos);
-          src_pos += 3;
-        }
-      }
-      TakeOver(std::move(pMask));
-      break;
-    }
-    case FXDIB_Rgb32: {
-      auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
-      if (!pMask->Create(m_Width, m_Height, FXDIB_8bppMask))
-        return false;
-
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* src_pos = m_pBuffer + row * m_Pitch;
-        uint8_t* dest_pos = pMask->GetBuffer() + row * pMask->GetPitch();
-        for (int col = 0; col < m_Width; col++) {
-          *dest_pos++ = FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos);
-          src_pos += 4;
-        }
-      }
-      TakeOver(std::move(pMask));
-      break;
-    }
-    default:
-      return false;
-  }
-  return true;
-}
-
-bool CFX_DIBitmap::MultiplyAlpha(int alpha) {
-  if (!m_pBuffer) {
-    return false;
-  }
-  switch (GetFormat()) {
-    case FXDIB_1bppMask:
-      if (!ConvertFormat(FXDIB_8bppMask)) {
-        return false;
-      }
-      MultiplyAlpha(alpha);
-      break;
-    case FXDIB_8bppMask: {
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* scan_line = m_pBuffer + row * m_Pitch;
-        for (int col = 0; col < m_Width; col++) {
-          scan_line[col] = scan_line[col] * alpha / 255;
-        }
-      }
-      break;
-    }
-    case FXDIB_Argb: {
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* scan_line = m_pBuffer + row * m_Pitch + 3;
-        for (int col = 0; col < m_Width; col++) {
-          *scan_line = (*scan_line) * alpha / 255;
-          scan_line += 4;
-        }
-      }
-      break;
-    }
-    default:
-      if (HasAlpha()) {
-        m_pAlphaMask->MultiplyAlpha(alpha);
-      } else if (IsCmykImage()) {
-        if (!ConvertFormat((FXDIB_Format)(GetFormat() | 0x0200))) {
-          return false;
-        }
-        m_pAlphaMask->MultiplyAlpha(alpha);
-      } else {
-        if (!ConvertFormat(FXDIB_Argb)) {
-          return false;
-        }
-        MultiplyAlpha(alpha);
-      }
-      break;
-  }
-  return true;
-}
-
-uint32_t CFX_DIBitmap::GetPixel(int x, int y) const {
-  if (!m_pBuffer) {
-    return 0;
-  }
-  uint8_t* pos = m_pBuffer + y * m_Pitch + x * GetBPP() / 8;
-  switch (GetFormat()) {
-    case FXDIB_1bppMask: {
-      if ((*pos) & (1 << (7 - x % 8))) {
-        return 0xff000000;
-      }
-      return 0;
-    }
-    case FXDIB_1bppRgb: {
-      if ((*pos) & (1 << (7 - x % 8))) {
-        return m_pPalette ? m_pPalette.get()[1] : 0xffffffff;
-      }
-      return m_pPalette ? m_pPalette.get()[0] : 0xff000000;
-    }
-    case FXDIB_8bppMask:
-      return (*pos) << 24;
-    case FXDIB_8bppRgb:
-      return m_pPalette ? m_pPalette.get()[*pos]
-                        : (0xff000000 | ((*pos) * 0x10101));
-    case FXDIB_Rgb:
-    case FXDIB_Rgba:
-    case FXDIB_Rgb32:
-      return FXARGB_GETDIB(pos) | 0xff000000;
-    case FXDIB_Argb:
-      return FXARGB_GETDIB(pos);
-    default:
-      break;
-  }
-  return 0;
-}
-
-void CFX_DIBitmap::SetPixel(int x, int y, uint32_t color) {
-  if (!m_pBuffer) {
-    return;
-  }
-  if (x < 0 || x >= m_Width || y < 0 || y >= m_Height) {
-    return;
-  }
-  uint8_t* pos = m_pBuffer + y * m_Pitch + x * GetBPP() / 8;
-  switch (GetFormat()) {
-    case FXDIB_1bppMask:
-      if (color >> 24) {
-        *pos |= 1 << (7 - x % 8);
-      } else {
-        *pos &= ~(1 << (7 - x % 8));
-      }
-      break;
-    case FXDIB_1bppRgb:
-      if (m_pPalette) {
-        if (color == m_pPalette.get()[1]) {
-          *pos |= 1 << (7 - x % 8);
-        } else {
-          *pos &= ~(1 << (7 - x % 8));
-        }
-      } else {
-        if (color == 0xffffffff) {
-          *pos |= 1 << (7 - x % 8);
-        } else {
-          *pos &= ~(1 << (7 - x % 8));
-        }
-      }
-      break;
-    case FXDIB_8bppMask:
-      *pos = (uint8_t)(color >> 24);
-      break;
-    case FXDIB_8bppRgb: {
-      if (m_pPalette) {
-        for (int i = 0; i < 256; i++) {
-          if (m_pPalette.get()[i] == color) {
-            *pos = (uint8_t)i;
-            return;
-          }
-        }
-        *pos = 0;
-      } else {
-        *pos = FXRGB2GRAY(FXARGB_R(color), FXARGB_G(color), FXARGB_B(color));
-      }
-      break;
-    }
-    case FXDIB_Rgb:
-    case FXDIB_Rgb32: {
-      int alpha = FXARGB_A(color);
-      pos[0] = (FXARGB_B(color) * alpha + pos[0] * (255 - alpha)) / 255;
-      pos[1] = (FXARGB_G(color) * alpha + pos[1] * (255 - alpha)) / 255;
-      pos[2] = (FXARGB_R(color) * alpha + pos[2] * (255 - alpha)) / 255;
-      break;
-    }
-    case FXDIB_Rgba: {
-      pos[0] = FXARGB_B(color);
-      pos[1] = FXARGB_G(color);
-      pos[2] = FXARGB_R(color);
-      break;
-    }
-    case FXDIB_Argb:
-      FXARGB_SETDIB(pos, color);
-      break;
-    default:
-      break;
-  }
-}
-
-void CFX_DIBitmap::DownSampleScanline(int line,
-                                      uint8_t* dest_scan,
-                                      int dest_bpp,
-                                      int dest_width,
-                                      bool bFlipX,
-                                      int clip_left,
-                                      int clip_width) const {
-  if (!m_pBuffer) {
-    return;
-  }
-  int src_Bpp = m_bpp / 8;
-  uint8_t* scanline = m_pBuffer + line * m_Pitch;
-  if (src_Bpp == 0) {
-    for (int i = 0; i < clip_width; i++) {
-      uint32_t dest_x = clip_left + i;
-      uint32_t src_x = dest_x * m_Width / dest_width;
-      if (bFlipX) {
-        src_x = m_Width - src_x - 1;
-      }
-      src_x %= m_Width;
-      dest_scan[i] = (scanline[src_x / 8] & (1 << (7 - src_x % 8))) ? 255 : 0;
-    }
-  } else if (src_Bpp == 1) {
-    for (int i = 0; i < clip_width; i++) {
-      uint32_t dest_x = clip_left + i;
-      uint32_t src_x = dest_x * m_Width / dest_width;
-      if (bFlipX) {
-        src_x = m_Width - src_x - 1;
-      }
-      src_x %= m_Width;
-      int dest_pos = i;
-      if (m_pPalette) {
-        if (!IsCmykImage()) {
-          dest_pos *= 3;
-          FX_ARGB argb = m_pPalette.get()[scanline[src_x]];
-          dest_scan[dest_pos] = FXARGB_B(argb);
-          dest_scan[dest_pos + 1] = FXARGB_G(argb);
-          dest_scan[dest_pos + 2] = FXARGB_R(argb);
-        } else {
-          dest_pos *= 4;
-          FX_CMYK cmyk = m_pPalette.get()[scanline[src_x]];
-          dest_scan[dest_pos] = FXSYS_GetCValue(cmyk);
-          dest_scan[dest_pos + 1] = FXSYS_GetMValue(cmyk);
-          dest_scan[dest_pos + 2] = FXSYS_GetYValue(cmyk);
-          dest_scan[dest_pos + 3] = FXSYS_GetKValue(cmyk);
-        }
-      } else {
-        dest_scan[dest_pos] = scanline[src_x];
-      }
-    }
-  } else {
-    for (int i = 0; i < clip_width; i++) {
-      uint32_t dest_x = clip_left + i;
-      uint32_t src_x =
-          bFlipX ? (m_Width - dest_x * m_Width / dest_width - 1) * src_Bpp
-                 : (dest_x * m_Width / dest_width) * src_Bpp;
-      src_x %= m_Width * src_Bpp;
-      int dest_pos = i * src_Bpp;
-      for (int b = 0; b < src_Bpp; b++) {
-        dest_scan[dest_pos + b] = scanline[src_x + b];
-      }
-    }
-  }
-}
-
-// TODO(weili): Split this function into two for handling CMYK and RGB
-// colors separately.
-bool CFX_DIBitmap::ConvertColorScale(uint32_t forecolor, uint32_t backcolor) {
-  ASSERT(!IsAlphaMask());
-  if (!m_pBuffer || IsAlphaMask()) {
-    return false;
-  }
-  // Values used for CMYK colors.
-  int fc = 0;
-  int fm = 0;
-  int fy = 0;
-  int fk = 0;
-  int bc = 0;
-  int bm = 0;
-  int by = 0;
-  int bk = 0;
-  // Values used for RGB colors.
-  int fr = 0;
-  int fg = 0;
-  int fb = 0;
-  int br = 0;
-  int bg = 0;
-  int bb = 0;
-  bool isCmykImage = IsCmykImage();
-  if (isCmykImage) {
-    fc = FXSYS_GetCValue(forecolor);
-    fm = FXSYS_GetMValue(forecolor);
-    fy = FXSYS_GetYValue(forecolor);
-    fk = FXSYS_GetKValue(forecolor);
-    bc = FXSYS_GetCValue(backcolor);
-    bm = FXSYS_GetMValue(backcolor);
-    by = FXSYS_GetYValue(backcolor);
-    bk = FXSYS_GetKValue(backcolor);
-  } else {
-    fr = FXSYS_GetRValue(forecolor);
-    fg = FXSYS_GetGValue(forecolor);
-    fb = FXSYS_GetBValue(forecolor);
-    br = FXSYS_GetRValue(backcolor);
-    bg = FXSYS_GetGValue(backcolor);
-    bb = FXSYS_GetBValue(backcolor);
-  }
-  if (m_bpp <= 8) {
-    if (isCmykImage) {
-      if (forecolor == 0xff && backcolor == 0 && !m_pPalette) {
-        return true;
-      }
-    } else if (forecolor == 0 && backcolor == 0xffffff && !m_pPalette) {
-      return true;
-    }
-    if (!m_pPalette) {
-      BuildPalette();
-    }
-    int size = 1 << m_bpp;
-    if (isCmykImage) {
-      for (int i = 0; i < size; i++) {
-        uint8_t b, g, r;
-        AdobeCMYK_to_sRGB1(FXSYS_GetCValue(m_pPalette.get()[i]),
-                           FXSYS_GetMValue(m_pPalette.get()[i]),
-                           FXSYS_GetYValue(m_pPalette.get()[i]),
-                           FXSYS_GetKValue(m_pPalette.get()[i]), r, g, b);
-        int gray = 255 - FXRGB2GRAY(r, g, b);
-        m_pPalette.get()[i] = CmykEncode(
-            bc + (fc - bc) * gray / 255, bm + (fm - bm) * gray / 255,
-            by + (fy - by) * gray / 255, bk + (fk - bk) * gray / 255);
-      }
-    } else {
-      for (int i = 0; i < size; i++) {
-        int gray = FXRGB2GRAY(FXARGB_R(m_pPalette.get()[i]),
-                              FXARGB_G(m_pPalette.get()[i]),
-                              FXARGB_B(m_pPalette.get()[i]));
-        m_pPalette.get()[i] = FXARGB_MAKE(0xff, br + (fr - br) * gray / 255,
-                                          bg + (fg - bg) * gray / 255,
-                                          bb + (fb - bb) * gray / 255);
-      }
-    }
-    return true;
-  }
-  if (isCmykImage) {
-    if (forecolor == 0xff && backcolor == 0x00) {
-      for (int row = 0; row < m_Height; row++) {
-        uint8_t* scanline = m_pBuffer + row * m_Pitch;
-        for (int col = 0; col < m_Width; col++) {
-          uint8_t b, g, r;
-          AdobeCMYK_to_sRGB1(scanline[0], scanline[1], scanline[2], scanline[3],
-                             r, g, b);
-          *scanline++ = 0;
-          *scanline++ = 0;
-          *scanline++ = 0;
-          *scanline++ = 255 - FXRGB2GRAY(r, g, b);
-        }
-      }
-      return true;
-    }
-  } else if (forecolor == 0 && backcolor == 0xffffff) {
-    for (int row = 0; row < m_Height; row++) {
-      uint8_t* scanline = m_pBuffer + row * m_Pitch;
-      int gap = m_bpp / 8 - 2;
-      for (int col = 0; col < m_Width; col++) {
-        int gray = FXRGB2GRAY(scanline[2], scanline[1], scanline[0]);
-        *scanline++ = gray;
-        *scanline++ = gray;
-        *scanline = gray;
-        scanline += gap;
-      }
-    }
-    return true;
-  }
-  if (isCmykImage) {
-    for (int row = 0; row < m_Height; row++) {
-      uint8_t* scanline = m_pBuffer + row * m_Pitch;
-      for (int col = 0; col < m_Width; col++) {
-        uint8_t b, g, r;
-        AdobeCMYK_to_sRGB1(scanline[0], scanline[1], scanline[2], scanline[3],
-                           r, g, b);
-        int gray = 255 - FXRGB2GRAY(r, g, b);
-        *scanline++ = bc + (fc - bc) * gray / 255;
-        *scanline++ = bm + (fm - bm) * gray / 255;
-        *scanline++ = by + (fy - by) * gray / 255;
-        *scanline++ = bk + (fk - bk) * gray / 255;
-      }
-    }
-  } else {
-    for (int row = 0; row < m_Height; row++) {
-      uint8_t* scanline = m_pBuffer + row * m_Pitch;
-      int gap = m_bpp / 8 - 2;
-      for (int col = 0; col < m_Width; col++) {
-        int gray = FXRGB2GRAY(scanline[2], scanline[1], scanline[0]);
-        *scanline++ = bb + (fb - bb) * gray / 255;
-        *scanline++ = bg + (fg - bg) * gray / 255;
-        *scanline = br + (fr - br) * gray / 255;
-        scanline += gap;
-      }
-    }
-  }
-  return true;
-}
-
-CFX_DIBExtractor::CFX_DIBExtractor(const CFX_RetainPtr<CFX_DIBSource>& pSrc) {
-  if (pSrc->GetBuffer()) {
-    CFX_RetainPtr<CFX_DIBSource> pOldSrc(pSrc);
-    m_pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
-    if (!m_pBitmap->Create(pOldSrc->GetWidth(), pOldSrc->GetHeight(),
-                           pOldSrc->GetFormat(), pOldSrc->GetBuffer())) {
-      m_pBitmap.Reset();
-      return;
-    }
-    m_pBitmap->SetPalette(pOldSrc->GetPalette());
-    m_pBitmap->SetAlphaMask(pOldSrc->m_pAlphaMask);
-  } else {
-    m_pBitmap = pSrc->Clone();
-  }
-}
-
-CFX_DIBExtractor::~CFX_DIBExtractor() {}
-
 CFX_BitmapStorer::CFX_BitmapStorer() {
 }