diff --git a/BUILD.gn b/BUILD.gn
index 99e71cf..4d40e03 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -660,8 +660,8 @@
     "core/fpdfapi/render/cpdf_charposlist.h",
     "core/fpdfapi/render/cpdf_devicebuffer.cpp",
     "core/fpdfapi/render/cpdf_devicebuffer.h",
-    "core/fpdfapi/render/cpdf_dibsource.cpp",
-    "core/fpdfapi/render/cpdf_dibsource.h",
+    "core/fpdfapi/render/cpdf_dibbase.cpp",
+    "core/fpdfapi/render/cpdf_dibbase.h",
     "core/fpdfapi/render/cpdf_dibtransferfunc.cpp",
     "core/fpdfapi/render/cpdf_dibtransferfunc.h",
     "core/fpdfapi/render/cpdf_docrenderdata.cpp",
@@ -1050,12 +1050,12 @@
     "core/fxge/dib/cfx_bitmapcomposer.h",
     "core/fxge/dib/cfx_bitmapstorer.cpp",
     "core/fxge/dib/cfx_bitmapstorer.h",
+    "core/fxge/dib/cfx_dibbase.cpp",
+    "core/fxge/dib/cfx_dibbase.h",
     "core/fxge/dib/cfx_dibextractor.cpp",
     "core/fxge/dib/cfx_dibextractor.h",
     "core/fxge/dib/cfx_dibitmap.cpp",
     "core/fxge/dib/cfx_dibitmap.h",
-    "core/fxge/dib/cfx_dibsource.cpp",
-    "core/fxge/dib/cfx_dibsource.h",
     "core/fxge/dib/cfx_filtereddib.cpp",
     "core/fxge/dib/cfx_filtereddib.h",
     "core/fxge/dib/cfx_imagerenderer.cpp",
diff --git a/core/fpdfapi/font/cpdf_type3char.cpp b/core/fpdfapi/font/cpdf_type3char.cpp
index 8a89582..a04e83c 100644
--- a/core/fpdfapi/font/cpdf_type3char.cpp
+++ b/core/fpdfapi/font/cpdf_type3char.cpp
@@ -49,15 +49,15 @@
 
   m_ImageMatrix = pPageObj->AsImage()->matrix();
   {
-    // |pSource| actually gets assigned a CPDF_DIBSource, which has pointers
+    // |pSource| actually gets assigned a CPDF_DIBBase, which has pointers
     // into objects owned by |m_pForm|. Make sure it is out of scope before
     // clearing the form.
-    RetainPtr<CFX_DIBSource> pSource =
-        pPageObj->AsImage()->GetImage()->LoadDIBSource();
+    RetainPtr<CFX_DIBBase> pSource =
+        pPageObj->AsImage()->GetImage()->LoadDIBBase();
 
-    // Clone() is non-virtual, and can't be overloaded by CPDF_DIBSource to
+    // Clone() is non-virtual, and can't be overloaded by CPDF_DIBBase to
     // return a clone of the subclass as one would typically expect from a
-    // such a method. Instead, it only clones the CFX_DIBSource, none of whose
+    // such a method. Instead, it only clones the CFX_DIBBase, none of whose
     // members point to objects owned by the form. As a result, |m_pBitmap|
     // may outlive |m_pForm|.
     if (pSource)
diff --git a/core/fpdfapi/page/cpdf_generalstate.cpp b/core/fpdfapi/page/cpdf_generalstate.cpp
index 2657578..ea91273 100644
--- a/core/fpdfapi/page/cpdf_generalstate.cpp
+++ b/core/fpdfapi/page/cpdf_generalstate.cpp
@@ -8,7 +8,7 @@
 
 #include "constants/transparency.h"
 #include "core/fpdfapi/parser/cpdf_document.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fpdfapi/render/cpdf_docrenderdata.h"
 #include "core/fpdfapi/render/cpdf_transferfunc.h"
 
diff --git a/core/fpdfapi/page/cpdf_image.cpp b/core/fpdfapi/page/cpdf_image.cpp
index a1be407..b1c2fc9 100644
--- a/core/fpdfapi/page/cpdf_image.cpp
+++ b/core/fpdfapi/page/cpdf_image.cpp
@@ -23,7 +23,7 @@
 #include "core/fpdfapi/parser/cpdf_reference.h"
 #include "core/fpdfapi/parser/cpdf_stream.h"
 #include "core/fpdfapi/parser/cpdf_string.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
 #include "core/fxcodec/codec/ccodec_jpegmodule.h"
 #include "core/fxcrt/fx_stream.h"
@@ -329,43 +329,43 @@
   pPage->GetRenderCache()->ResetBitmap(pHolder, pBitmap);
 }
 
-RetainPtr<CFX_DIBSource> CPDF_Image::LoadDIBSource() const {
-  auto source = pdfium::MakeRetain<CPDF_DIBSource>();
+RetainPtr<CFX_DIBBase> CPDF_Image::LoadDIBBase() const {
+  auto source = pdfium::MakeRetain<CPDF_DIBBase>();
   if (!source->Load(m_pDocument.Get(), m_pStream.Get()))
     return nullptr;
 
   if (!source->IsJBigImage())
     return source;
 
-  CPDF_DIBSource::LoadState ret = CPDF_DIBSource::LoadState::kContinue;
-  while (ret == CPDF_DIBSource::LoadState::kContinue)
-    ret = source->ContinueLoadDIBSource(nullptr);
-  return ret == CPDF_DIBSource::LoadState::kSuccess ? source : nullptr;
+  CPDF_DIBBase::LoadState ret = CPDF_DIBBase::LoadState::kContinue;
+  while (ret == CPDF_DIBBase::LoadState::kContinue)
+    ret = source->ContinueLoadDIBBase(nullptr);
+  return ret == CPDF_DIBBase::LoadState::kSuccess ? source : nullptr;
 }
 
-RetainPtr<CFX_DIBSource> CPDF_Image::DetachBitmap() {
-  return std::move(m_pDIBSource);
+RetainPtr<CFX_DIBBase> CPDF_Image::DetachBitmap() {
+  return std::move(m_pDIBBase);
 }
 
-RetainPtr<CFX_DIBSource> CPDF_Image::DetachMask() {
+RetainPtr<CFX_DIBBase> CPDF_Image::DetachMask() {
   return std::move(m_pMask);
 }
 
-bool CPDF_Image::StartLoadDIBSource(const CPDF_Dictionary* pFormResource,
-                                    CPDF_Dictionary* pPageResource,
-                                    bool bStdCS,
-                                    uint32_t GroupFamily,
-                                    bool bLoadMask) {
-  auto source = pdfium::MakeRetain<CPDF_DIBSource>();
-  CPDF_DIBSource::LoadState ret = source->StartLoadDIBSource(
+bool CPDF_Image::StartLoadDIBBase(const CPDF_Dictionary* pFormResource,
+                                  CPDF_Dictionary* pPageResource,
+                                  bool bStdCS,
+                                  uint32_t GroupFamily,
+                                  bool bLoadMask) {
+  auto source = pdfium::MakeRetain<CPDF_DIBBase>();
+  CPDF_DIBBase::LoadState ret = source->StartLoadDIBBase(
       m_pDocument.Get(), m_pStream.Get(), true, pFormResource, pPageResource,
       bStdCS, GroupFamily, bLoadMask);
-  if (ret == CPDF_DIBSource::LoadState::kFail) {
-    m_pDIBSource.Reset();
+  if (ret == CPDF_DIBBase::LoadState::kFail) {
+    m_pDIBBase.Reset();
     return false;
   }
-  m_pDIBSource = source;
-  if (ret == CPDF_DIBSource::LoadState::kContinue)
+  m_pDIBBase = source;
+  if (ret == CPDF_DIBBase::LoadState::kContinue)
     return true;
 
   m_pMask = source->DetachMask();
@@ -374,16 +374,16 @@
 }
 
 bool CPDF_Image::Continue(PauseIndicatorIface* pPause) {
-  RetainPtr<CPDF_DIBSource> pSource = m_pDIBSource.As<CPDF_DIBSource>();
-  CPDF_DIBSource::LoadState ret = pSource->ContinueLoadDIBSource(pPause);
-  if (ret == CPDF_DIBSource::LoadState::kContinue)
+  RetainPtr<CPDF_DIBBase> pSource = m_pDIBBase.As<CPDF_DIBBase>();
+  CPDF_DIBBase::LoadState ret = pSource->ContinueLoadDIBBase(pPause);
+  if (ret == CPDF_DIBBase::LoadState::kContinue)
     return true;
 
-  if (ret == CPDF_DIBSource::LoadState::kSuccess) {
+  if (ret == CPDF_DIBBase::LoadState::kSuccess) {
     m_pMask = pSource->DetachMask();
     m_MatteColor = pSource->GetMatteColor();
   } else {
-    m_pDIBSource.Reset();
+    m_pDIBBase.Reset();
   }
   return false;
 }
diff --git a/core/fpdfapi/page/cpdf_image.h b/core/fpdfapi/page/cpdf_image.h
index e6c6d18..4306109 100644
--- a/core/fpdfapi/page/cpdf_image.h
+++ b/core/fpdfapi/page/cpdf_image.h
@@ -15,7 +15,7 @@
 #include "core/fxcrt/retain_ptr.h"
 #include "core/fxcrt/unowned_ptr.h"
 
-class CFX_DIBSource;
+class CFX_DIBBase;
 class CFX_DIBitmap;
 class CPDF_Document;
 class CPDF_Page;
@@ -41,7 +41,7 @@
   bool IsMask() const { return m_bIsMask; }
   bool IsInterpol() const { return m_bInterpolate; }
 
-  RetainPtr<CFX_DIBSource> LoadDIBSource() const;
+  RetainPtr<CFX_DIBBase> LoadDIBBase() const;
 
   void SetImage(const RetainPtr<CFX_DIBitmap>& pDIBitmap);
   void SetJpegImage(const RetainPtr<IFX_SeekableReadStream>& pFile);
@@ -50,20 +50,20 @@
   void ResetCache(CPDF_Page* pPage, const RetainPtr<CFX_DIBitmap>& pDIBitmap);
 
   // Returns whether to Continue() or not.
-  bool StartLoadDIBSource(const CPDF_Dictionary* pFormResource,
-                          CPDF_Dictionary* pPageResource,
-                          bool bStdCS,
-                          uint32_t GroupFamily,
-                          bool bLoadMask);
+  bool StartLoadDIBBase(const CPDF_Dictionary* pFormResource,
+                        CPDF_Dictionary* pPageResource,
+                        bool bStdCS,
+                        uint32_t GroupFamily,
+                        bool bLoadMask);
 
   // Returns whether to Continue() or not.
   bool Continue(PauseIndicatorIface* pPause);
 
-  RetainPtr<CFX_DIBSource> DetachBitmap();
-  RetainPtr<CFX_DIBSource> DetachMask();
+  RetainPtr<CFX_DIBBase> DetachBitmap();
+  RetainPtr<CFX_DIBBase> DetachMask();
 
-  RetainPtr<CFX_DIBSource> m_pDIBSource;
-  RetainPtr<CFX_DIBSource> m_pMask;
+  RetainPtr<CFX_DIBBase> m_pDIBBase;
+  RetainPtr<CFX_DIBBase> m_pMask;
   uint32_t m_MatteColor = 0;
 
  private:
diff --git a/core/fpdfapi/parser/cpdf_document.cpp b/core/fpdfapi/parser/cpdf_document.cpp
index 63556de..7119e76 100644
--- a/core/fpdfapi/parser/cpdf_document.cpp
+++ b/core/fpdfapi/parser/cpdf_document.cpp
@@ -26,7 +26,7 @@
 #include "core/fpdfapi/parser/cpdf_reference.h"
 #include "core/fpdfapi/parser/cpdf_stream.h"
 #include "core/fpdfapi/parser/cpdf_string.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fpdfapi/render/cpdf_docrenderdata.h"
 #include "core/fxcodec/JBig2_DocumentContext.h"
 #include "core/fxcrt/fx_codepage.h"
diff --git a/core/fpdfapi/render/cpdf_dibsource.cpp b/core/fpdfapi/render/cpdf_dibbase.cpp
similarity index 90%
rename from core/fpdfapi/render/cpdf_dibsource.cpp
rename to core/fpdfapi/render/cpdf_dibbase.cpp
index 0c69852..9aa1ab4 100644
--- a/core/fpdfapi/render/cpdf_dibsource.cpp
+++ b/core/fpdfapi/render/cpdf_dibbase.cpp
@@ -4,7 +4,7 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 
 #include <algorithm>
 #include <memory>
@@ -101,9 +101,9 @@
 
 }  // namespace
 
-CPDF_DIBSource::CPDF_DIBSource() {}
+CPDF_DIBBase::CPDF_DIBBase() {}
 
-CPDF_DIBSource::~CPDF_DIBSource() {
+CPDF_DIBBase::~CPDF_DIBBase() {
   if (m_pColorSpace && m_pDocument) {
     auto* pPageData = m_pDocument->GetPageData();
     if (pPageData) {
@@ -113,7 +113,7 @@
   }
 }
 
-bool CPDF_DIBSource::Load(CPDF_Document* pDoc, const CPDF_Stream* pStream) {
+bool CPDF_DIBBase::Load(CPDF_Document* pDoc, const CPDF_Stream* pStream) {
   if (!pStream)
     return false;
 
@@ -181,7 +181,7 @@
   return true;
 }
 
-bool CPDF_DIBSource::ContinueToLoadMask() {
+bool CPDF_DIBBase::ContinueToLoadMask() {
   if (m_bImageMask) {
     m_bpp = 1;
     m_bpc = 1;
@@ -218,7 +218,7 @@
   return true;
 }
 
-CPDF_DIBSource::LoadState CPDF_DIBSource::StartLoadDIBSource(
+CPDF_DIBBase::LoadState CPDF_DIBBase::StartLoadDIBBase(
     CPDF_Document* pDoc,
     const CPDF_Stream* pStream,
     bool bHasMask,
@@ -280,7 +280,7 @@
   return LoadState::kSuccess;
 }
 
-CPDF_DIBSource::LoadState CPDF_DIBSource::ContinueLoadDIBSource(
+CPDF_DIBBase::LoadState CPDF_DIBBase::ContinueLoadDIBBase(
     PauseIndicatorIface* pPause) {
   if (m_Status == LoadState::kContinue)
     return ContinueLoadMaskDIB(pPause);
@@ -335,8 +335,8 @@
   return iContinueStatus;
 }
 
-bool CPDF_DIBSource::LoadColorInfo(const CPDF_Dictionary* pFormResources,
-                                   const CPDF_Dictionary* pPageResources) {
+bool CPDF_DIBBase::LoadColorInfo(const CPDF_Dictionary* pFormResources,
+                                 const CPDF_Dictionary* pPageResources) {
   m_bpc_orig = m_pDict->GetIntegerFor("BitsPerComponent");
   if (m_pDict->GetIntegerFor("ImageMask"))
     m_bImageMask = true;
@@ -392,8 +392,8 @@
   return GetDecodeAndMaskArray(&m_bDefaultDecode, &m_bColorKey);
 }
 
-bool CPDF_DIBSource::GetDecodeAndMaskArray(bool* bDefaultDecode,
-                                           bool* bColorKey) {
+bool CPDF_DIBBase::GetDecodeAndMaskArray(bool* bDefaultDecode,
+                                         bool* bColorKey) {
   if (!m_pColorSpace)
     return false;
 
@@ -446,7 +446,7 @@
   return true;
 }
 
-CPDF_DIBSource::LoadState CPDF_DIBSource::CreateDecoder() {
+CPDF_DIBBase::LoadState CPDF_DIBBase::CreateDecoder() {
   ByteString decoder = m_pStreamAcc->GetImageDecoder();
   if (decoder.IsEmpty())
     return LoadState::kSuccess;
@@ -503,9 +503,9 @@
   return LoadState::kSuccess;
 }
 
-bool CPDF_DIBSource::CreateDCTDecoder(const uint8_t* src_data,
-                                      uint32_t src_size,
-                                      const CPDF_Dictionary* pParams) {
+bool CPDF_DIBBase::CreateDCTDecoder(const uint8_t* src_data,
+                                    uint32_t src_size,
+                                    const CPDF_Dictionary* pParams) {
   CCodec_JpegModule* pJpegModule = CPDF_ModuleMgr::Get()->GetJpegModule();
   m_pDecoder = pJpegModule->CreateDecoder(
       src_data, src_size, m_Width, m_Height, m_nComponents,
@@ -574,7 +574,7 @@
   return true;
 }
 
-RetainPtr<CFX_DIBitmap> CPDF_DIBSource::LoadJpxBitmap() {
+RetainPtr<CFX_DIBitmap> CPDF_DIBBase::LoadJpxBitmap() {
   CCodec_JpxModule* pJpxModule = CPDF_ModuleMgr::Get()->GetJpxModule();
   auto context = pdfium::MakeUnique<JpxBitMapContext>(pJpxModule);
   context->set_decoder(pJpxModule->CreateDecoder(
@@ -651,7 +651,7 @@
   return pCachedBitmap;
 }
 
-CPDF_DIBSource::LoadState CPDF_DIBSource::StartLoadMask() {
+CPDF_DIBBase::LoadState CPDF_DIBBase::StartLoadMask() {
   m_MatteColor = 0XFFFFFFFF;
   m_pMaskStream = m_pDict->GetStreamFor("SMask");
   if (!m_pMaskStream) {
@@ -676,12 +676,12 @@
   return StartLoadMaskDIB();
 }
 
-CPDF_DIBSource::LoadState CPDF_DIBSource::ContinueLoadMaskDIB(
+CPDF_DIBBase::LoadState CPDF_DIBBase::ContinueLoadMaskDIB(
     PauseIndicatorIface* pPause) {
   if (!m_pMask)
     return LoadState::kSuccess;
 
-  LoadState ret = m_pMask->ContinueLoadDIBSource(pPause);
+  LoadState ret = m_pMask->ContinueLoadDIBBase(pPause);
   if (ret == LoadState::kContinue)
     return LoadState::kContinue;
 
@@ -695,19 +695,19 @@
   return LoadState::kSuccess;
 }
 
-RetainPtr<CPDF_DIBSource> CPDF_DIBSource::DetachMask() {
+RetainPtr<CPDF_DIBBase> CPDF_DIBBase::DetachMask() {
   return std::move(m_pMask);
 }
 
-bool CPDF_DIBSource::IsJBigImage() const {
+bool CPDF_DIBBase::IsJBigImage() const {
   return m_pStreamAcc->GetImageDecoder() == "JBIG2Decode";
 }
 
-CPDF_DIBSource::LoadState CPDF_DIBSource::StartLoadMaskDIB() {
-  m_pMask = pdfium::MakeRetain<CPDF_DIBSource>();
+CPDF_DIBBase::LoadState CPDF_DIBBase::StartLoadMaskDIB() {
+  m_pMask = pdfium::MakeRetain<CPDF_DIBBase>();
   LoadState ret =
-      m_pMask->StartLoadDIBSource(m_pDocument.Get(), m_pMaskStream.Get(), false,
-                                  nullptr, nullptr, true, 0, false);
+      m_pMask->StartLoadDIBBase(m_pDocument.Get(), m_pMaskStream.Get(), false,
+                                nullptr, nullptr, true, 0, false);
   if (ret == LoadState::kContinue) {
     if (m_Status == LoadState::kFail)
       m_Status = LoadState::kContinue;
@@ -718,7 +718,7 @@
   return LoadState::kSuccess;
 }
 
-void CPDF_DIBSource::LoadPalette() {
+void CPDF_DIBBase::LoadPalette() {
   if (!m_pColorSpace || m_Family == PDFCS_PATTERN)
     return;
 
@@ -791,7 +791,7 @@
   }
 }
 
-void CPDF_DIBSource::ValidateDictParam() {
+void CPDF_DIBBase::ValidateDictParam() {
   m_bpc = m_bpc_orig;
   const CPDF_Object* pFilter = m_pDict->GetDirectObjectFor("Filter");
   if (pFilter) {
@@ -824,8 +824,8 @@
     m_bpc = 0;
 }
 
-void CPDF_DIBSource::TranslateScanline24bpp(uint8_t* dest_scan,
-                                            const uint8_t* src_scan) const {
+void CPDF_DIBBase::TranslateScanline24bpp(uint8_t* dest_scan,
+                                          const uint8_t* src_scan) const {
   if (m_bpc == 0)
     return;
 
@@ -873,7 +873,7 @@
   }
 }
 
-bool CPDF_DIBSource::TranslateScanline24bppDefaultDecode(
+bool CPDF_DIBBase::TranslateScanline24bppDefaultDecode(
     uint8_t* dest_scan,
     const uint8_t* src_scan) const {
   if (!m_bDefaultDecode)
@@ -935,11 +935,11 @@
   return true;
 }
 
-uint8_t* CPDF_DIBSource::GetBuffer() const {
+uint8_t* CPDF_DIBBase::GetBuffer() const {
   return m_pCachedBitmap ? m_pCachedBitmap->GetBuffer() : nullptr;
 }
 
-const uint8_t* CPDF_DIBSource::GetScanline(int line) const {
+const uint8_t* CPDF_DIBBase::GetScanline(int line) const {
   if (m_bpc == 0)
     return nullptr;
 
@@ -1058,18 +1058,17 @@
   return m_pMaskedLine.get();
 }
 
-bool CPDF_DIBSource::SkipToScanline(int line,
-                                    PauseIndicatorIface* pPause) const {
+bool CPDF_DIBBase::SkipToScanline(int line, PauseIndicatorIface* pPause) const {
   return m_pDecoder && m_pDecoder->SkipToScanline(line, pPause);
 }
 
-void CPDF_DIBSource::DownSampleScanline(int line,
-                                        uint8_t* dest_scan,
-                                        int dest_bpp,
-                                        int dest_width,
-                                        bool bFlipX,
-                                        int clip_left,
-                                        int clip_width) const {
+void CPDF_DIBBase::DownSampleScanline(int line,
+                                      uint8_t* dest_scan,
+                                      int dest_bpp,
+                                      int dest_width,
+                                      bool bFlipX,
+                                      int clip_left,
+                                      int clip_width) const {
   if (line < 0 || !dest_scan || dest_bpp <= 0 || dest_width <= 0 ||
       clip_left < 0 || clip_width <= 0) {
     return;
@@ -1122,15 +1121,15 @@
   }
 }
 
-void CPDF_DIBSource::DownSampleScanline1Bit(int orig_Bpp,
-                                            int dest_Bpp,
-                                            uint32_t src_width,
-                                            const uint8_t* pSrcLine,
-                                            uint8_t* dest_scan,
-                                            int dest_width,
-                                            bool bFlipX,
-                                            int clip_left,
-                                            int clip_width) const {
+void CPDF_DIBBase::DownSampleScanline1Bit(int orig_Bpp,
+                                          int dest_Bpp,
+                                          uint32_t src_width,
+                                          const uint8_t* pSrcLine,
+                                          uint8_t* dest_scan,
+                                          int dest_width,
+                                          bool bFlipX,
+                                          int clip_left,
+                                          int clip_width) const {
   if (m_bColorKey && !m_bImageMask) {
     uint32_t reset_argb = m_pPalette ? m_pPalette.get()[0] : 0xFF000000;
     uint32_t set_argb = m_pPalette ? m_pPalette.get()[1] : 0xFFFFFFFF;
@@ -1181,15 +1180,15 @@
   }
 }
 
-void CPDF_DIBSource::DownSampleScanline8Bit(int orig_Bpp,
-                                            int dest_Bpp,
-                                            uint32_t src_width,
-                                            const uint8_t* pSrcLine,
-                                            uint8_t* dest_scan,
-                                            int dest_width,
-                                            bool bFlipX,
-                                            int clip_left,
-                                            int clip_width) const {
+void CPDF_DIBBase::DownSampleScanline8Bit(int orig_Bpp,
+                                          int dest_Bpp,
+                                          uint32_t src_width,
+                                          const uint8_t* pSrcLine,
+                                          uint8_t* dest_scan,
+                                          int dest_width,
+                                          bool bFlipX,
+                                          int clip_left,
+                                          int clip_width) const {
   if (m_bpc < 8) {
     uint64_t src_bit_pos = 0;
     for (uint32_t col = 0; col < src_width; col++) {
@@ -1246,15 +1245,15 @@
   }
 }
 
-void CPDF_DIBSource::DownSampleScanline32Bit(int orig_Bpp,
-                                             int dest_Bpp,
-                                             uint32_t src_width,
-                                             const uint8_t* pSrcLine,
-                                             uint8_t* dest_scan,
-                                             int dest_width,
-                                             bool bFlipX,
-                                             int clip_left,
-                                             int clip_width) const {
+void CPDF_DIBBase::DownSampleScanline32Bit(int orig_Bpp,
+                                           int dest_Bpp,
+                                           uint32_t src_width,
+                                           const uint8_t* pSrcLine,
+                                           uint8_t* dest_scan,
+                                           int dest_width,
+                                           bool bFlipX,
+                                           int clip_left,
+                                           int clip_width) const {
   // last_src_x used to store the last seen src_x position which should be
   // in [0, src_width). Set the initial value to be an invalid src_x value.
   uint32_t last_src_x = src_width;
@@ -1344,7 +1343,7 @@
   }
 }
 
-bool CPDF_DIBSource::TransMask() const {
+bool CPDF_DIBBase::TransMask() const {
   return m_bLoadMask && m_GroupFamily == PDFCS_DEVICECMYK &&
          m_Family == PDFCS_DEVICECMYK;
 }
diff --git a/core/fpdfapi/render/cpdf_dibsource.h b/core/fpdfapi/render/cpdf_dibbase.h
similarity index 85%
rename from core/fpdfapi/render/cpdf_dibsource.h
rename to core/fpdfapi/render/cpdf_dibbase.h
index 597390c..a100847 100644
--- a/core/fpdfapi/render/cpdf_dibsource.h
+++ b/core/fpdfapi/render/cpdf_dibbase.h
@@ -4,8 +4,8 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef CORE_FPDFAPI_RENDER_CPDF_DIBSOURCE_H_
-#define CORE_FPDFAPI_RENDER_CPDF_DIBSOURCE_H_
+#ifndef CORE_FPDFAPI_RENDER_CPDF_DIBBASE_H_
+#define CORE_FPDFAPI_RENDER_CPDF_DIBBASE_H_
 
 #include <map>
 #include <memory>
@@ -21,7 +21,7 @@
 #include "core/fxcrt/retain_ptr.h"
 #include "core/fxcrt/unowned_ptr.h"
 #include "core/fxge/cfx_defaultrenderdevice.h"
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 
 class CCodec_Jbig2Context;
 class CCodec_ScanlineDecoder;
@@ -39,7 +39,7 @@
 
 #define FPDF_HUGE_IMAGE_SIZE 60000000
 
-class CPDF_DIBSource : public CFX_DIBSource {
+class CPDF_DIBBase : public CFX_DIBBase {
  public:
   enum class LoadState : uint8_t { kFail, kSuccess, kContinue };
 
@@ -48,7 +48,7 @@
 
   bool Load(CPDF_Document* pDoc, const CPDF_Stream* pStream);
 
-  // CFX_DIBSource
+  // CFX_DIBBase
   bool SkipToScanline(int line, PauseIndicatorIface* pPause) const override;
   uint8_t* GetBuffer() const override;
   const uint8_t* GetScanline(int line) const override;
@@ -63,22 +63,22 @@
   const CPDF_ColorSpace* GetColorSpace() const { return m_pColorSpace.Get(); }
   uint32_t GetMatteColor() const { return m_MatteColor; }
 
-  LoadState StartLoadDIBSource(CPDF_Document* pDoc,
-                               const CPDF_Stream* pStream,
-                               bool bHasMask,
-                               const CPDF_Dictionary* pFormResources,
-                               CPDF_Dictionary* pPageResources,
-                               bool bStdCS,
-                               uint32_t GroupFamily,
-                               bool bLoadMask);
-  LoadState ContinueLoadDIBSource(PauseIndicatorIface* pPause);
-  RetainPtr<CPDF_DIBSource> DetachMask();
+  LoadState StartLoadDIBBase(CPDF_Document* pDoc,
+                             const CPDF_Stream* pStream,
+                             bool bHasMask,
+                             const CPDF_Dictionary* pFormResources,
+                             CPDF_Dictionary* pPageResources,
+                             bool bStdCS,
+                             uint32_t GroupFamily,
+                             bool bLoadMask);
+  LoadState ContinueLoadDIBBase(PauseIndicatorIface* pPause);
+  RetainPtr<CPDF_DIBBase> DetachMask();
 
   bool IsJBigImage() const;
 
  private:
-  CPDF_DIBSource();
-  ~CPDF_DIBSource() override;
+  CPDF_DIBBase();
+  ~CPDF_DIBBase() override;
 
   LoadState StartLoadMask();
   LoadState StartLoadMaskDIB();
@@ -149,7 +149,7 @@
   std::unique_ptr<uint8_t, FxFreeDeleter> m_pLineBuf;
   std::unique_ptr<uint8_t, FxFreeDeleter> m_pMaskedLine;
   RetainPtr<CFX_DIBitmap> m_pCachedBitmap;
-  RetainPtr<CPDF_DIBSource> m_pMask;
+  RetainPtr<CPDF_DIBBase> m_pMask;
   RetainPtr<CPDF_StreamAcc> m_pGlobalStream;
   std::unique_ptr<CCodec_ScanlineDecoder> m_pDecoder;
 
@@ -160,4 +160,4 @@
   LoadState m_Status = LoadState::kFail;
 };
 
-#endif  // CORE_FPDFAPI_RENDER_CPDF_DIBSOURCE_H_
+#endif  // CORE_FPDFAPI_RENDER_CPDF_DIBBASE_H_
diff --git a/core/fpdfapi/render/cpdf_docrenderdata.cpp b/core/fpdfapi/render/cpdf_docrenderdata.cpp
index 568bf76..c86eb9b 100644
--- a/core/fpdfapi/render/cpdf_docrenderdata.cpp
+++ b/core/fpdfapi/render/cpdf_docrenderdata.cpp
@@ -12,7 +12,7 @@
 #include "core/fpdfapi/page/cpdf_function.h"
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_document.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fpdfapi/render/cpdf_transferfunc.h"
 #include "core/fpdfapi/render/cpdf_type3cache.h"
 
diff --git a/core/fpdfapi/render/cpdf_imagecacheentry.cpp b/core/fpdfapi/render/cpdf_imagecacheentry.cpp
index 615a44d..681c39e 100644
--- a/core/fpdfapi/render/cpdf_imagecacheentry.cpp
+++ b/core/fpdfapi/render/cpdf_imagecacheentry.cpp
@@ -13,7 +13,7 @@
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
 #include "core/fpdfapi/parser/cpdf_document.h"
 #include "core/fpdfapi/parser/cpdf_stream.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
 #include "core/fpdfapi/render/cpdf_rendercontext.h"
 #include "core/fpdfapi/render/cpdf_renderstatus.h"
@@ -37,22 +37,22 @@
 }
 
 static uint32_t FPDF_ImageCache_EstimateImageSize(
-    const RetainPtr<CFX_DIBSource>& pDIB) {
+    const RetainPtr<CFX_DIBBase>& pDIB) {
   return pDIB && pDIB->GetBuffer()
              ? (uint32_t)pDIB->GetHeight() * pDIB->GetPitch() +
                    (uint32_t)pDIB->GetPaletteSize() * 4
              : 0;
 }
 
-RetainPtr<CFX_DIBSource> CPDF_ImageCacheEntry::DetachBitmap() {
+RetainPtr<CFX_DIBBase> CPDF_ImageCacheEntry::DetachBitmap() {
   return std::move(m_pCurBitmap);
 }
 
-RetainPtr<CFX_DIBSource> CPDF_ImageCacheEntry::DetachMask() {
+RetainPtr<CFX_DIBBase> CPDF_ImageCacheEntry::DetachMask() {
   return std::move(m_pCurMask);
 }
 
-CPDF_DIBSource::LoadState CPDF_ImageCacheEntry::StartGetCachedBitmap(
+CPDF_DIBBase::LoadState CPDF_ImageCacheEntry::StartGetCachedBitmap(
     const CPDF_Dictionary* pFormResources,
     CPDF_Dictionary* pPageResources,
     bool bStdCS,
@@ -64,32 +64,32 @@
   if (m_pCachedBitmap) {
     m_pCurBitmap = m_pCachedBitmap;
     m_pCurMask = m_pCachedMask;
-    return CPDF_DIBSource::LoadState::kSuccess;
+    return CPDF_DIBBase::LoadState::kSuccess;
   }
 
-  m_pCurBitmap = pdfium::MakeRetain<CPDF_DIBSource>();
-  CPDF_DIBSource::LoadState ret =
-      m_pCurBitmap.As<CPDF_DIBSource>()->StartLoadDIBSource(
+  m_pCurBitmap = pdfium::MakeRetain<CPDF_DIBBase>();
+  CPDF_DIBBase::LoadState ret =
+      m_pCurBitmap.As<CPDF_DIBBase>()->StartLoadDIBBase(
           m_pDocument.Get(), m_pImage->GetStream(), true, pFormResources,
           pPageResources, bStdCS, GroupFamily, bLoadMask);
-  if (ret == CPDF_DIBSource::LoadState::kContinue)
-    return CPDF_DIBSource::LoadState::kContinue;
+  if (ret == CPDF_DIBBase::LoadState::kContinue)
+    return CPDF_DIBBase::LoadState::kContinue;
 
-  if (ret == CPDF_DIBSource::LoadState::kSuccess)
+  if (ret == CPDF_DIBBase::LoadState::kSuccess)
     ContinueGetCachedBitmap(pRenderStatus);
   else
     m_pCurBitmap.Reset();
-  return CPDF_DIBSource::LoadState::kFail;
+  return CPDF_DIBBase::LoadState::kFail;
 }
 
 bool CPDF_ImageCacheEntry::Continue(PauseIndicatorIface* pPause,
                                     CPDF_RenderStatus* pRenderStatus) {
-  CPDF_DIBSource::LoadState ret =
-      m_pCurBitmap.As<CPDF_DIBSource>()->ContinueLoadDIBSource(pPause);
-  if (ret == CPDF_DIBSource::LoadState::kContinue)
+  CPDF_DIBBase::LoadState ret =
+      m_pCurBitmap.As<CPDF_DIBBase>()->ContinueLoadDIBBase(pPause);
+  if (ret == CPDF_DIBBase::LoadState::kContinue)
     return true;
 
-  if (ret == CPDF_DIBSource::LoadState::kSuccess)
+  if (ret == CPDF_DIBBase::LoadState::kSuccess)
     ContinueGetCachedBitmap(pRenderStatus);
   else
     m_pCurBitmap.Reset();
@@ -98,8 +98,8 @@
 
 void CPDF_ImageCacheEntry::ContinueGetCachedBitmap(
     CPDF_RenderStatus* pRenderStatus) {
-  m_MatteColor = m_pCurBitmap.As<CPDF_DIBSource>()->GetMatteColor();
-  m_pCurMask = m_pCurBitmap.As<CPDF_DIBSource>()->DetachMask();
+  m_MatteColor = m_pCurBitmap.As<CPDF_DIBBase>()->GetMatteColor();
+  m_pCurMask = m_pCurBitmap.As<CPDF_DIBBase>()->DetachMask();
   CPDF_RenderContext* pContext = pRenderStatus->GetContext();
   CPDF_PageRenderCache* pPageRenderCache = pContext->GetPageCache();
   m_dwTimeCount = pPageRenderCache->GetTimeCount();
diff --git a/core/fpdfapi/render/cpdf_imagecacheentry.h b/core/fpdfapi/render/cpdf_imagecacheentry.h
index df13c4b..8a4f919 100644
--- a/core/fpdfapi/render/cpdf_imagecacheentry.h
+++ b/core/fpdfapi/render/cpdf_imagecacheentry.h
@@ -9,7 +9,7 @@
 
 #include <memory>
 
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fxcrt/fx_system.h"
 #include "core/fxcrt/retain_ptr.h"
 #include "core/fxcrt/unowned_ptr.h"
@@ -32,7 +32,7 @@
   uint32_t GetTimeCount() const { return m_dwTimeCount; }
   CPDF_Image* GetImage() const { return m_pImage.Get(); }
 
-  CPDF_DIBSource::LoadState StartGetCachedBitmap(
+  CPDF_DIBBase::LoadState StartGetCachedBitmap(
       const CPDF_Dictionary* pFormResources,
       CPDF_Dictionary* pPageResources,
       bool bStdCS,
@@ -43,8 +43,8 @@
   // Returns whether to Continue() or not.
   bool Continue(PauseIndicatorIface* pPause, CPDF_RenderStatus* pRenderStatus);
 
-  RetainPtr<CFX_DIBSource> DetachBitmap();
-  RetainPtr<CFX_DIBSource> DetachMask();
+  RetainPtr<CFX_DIBBase> DetachBitmap();
+  RetainPtr<CFX_DIBBase> DetachMask();
 
   int m_dwTimeCount;
   uint32_t m_MatteColor;
@@ -55,10 +55,10 @@
 
   UnownedPtr<CPDF_Document> const m_pDocument;
   RetainPtr<CPDF_Image> const m_pImage;
-  RetainPtr<CFX_DIBSource> m_pCurBitmap;
-  RetainPtr<CFX_DIBSource> m_pCurMask;
-  RetainPtr<CFX_DIBSource> m_pCachedBitmap;
-  RetainPtr<CFX_DIBSource> m_pCachedMask;
+  RetainPtr<CFX_DIBBase> m_pCurBitmap;
+  RetainPtr<CFX_DIBBase> m_pCurMask;
+  RetainPtr<CFX_DIBBase> m_pCachedBitmap;
+  RetainPtr<CFX_DIBBase> m_pCachedMask;
   uint32_t m_dwCacheSize;
 };
 
diff --git a/core/fpdfapi/render/cpdf_imageloader.cpp b/core/fpdfapi/render/cpdf_imageloader.cpp
index f3a6263..157bc48 100644
--- a/core/fpdfapi/render/cpdf_imageloader.cpp
+++ b/core/fpdfapi/render/cpdf_imageloader.cpp
@@ -8,7 +8,7 @@
 
 #include "core/fpdfapi/page/cpdf_image.h"
 #include "core/fpdfapi/page/cpdf_imageobject.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fpdfapi/render/cpdf_imagecacheentry.h"
 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
 #include "core/fpdfapi/render/cpdf_renderstatus.h"
@@ -34,7 +34,7 @@
     ret = pCache->StartGetCachedBitmap(m_pImageObject->GetImage(), bStdCS,
                                        GroupFamily, bLoadMask, pRenderStatus);
   } else {
-    ret = m_pImageObject->GetImage()->StartLoadDIBSource(
+    ret = m_pImageObject->GetImage()->StartLoadDIBBase(
         pRenderStatus->GetFormResource(), pRenderStatus->GetPageResource(),
         bStdCS, GroupFamily, bLoadMask);
   }
diff --git a/core/fpdfapi/render/cpdf_imageloader.h b/core/fpdfapi/render/cpdf_imageloader.h
index 629609d..de29d0e 100644
--- a/core/fpdfapi/render/cpdf_imageloader.h
+++ b/core/fpdfapi/render/cpdf_imageloader.h
@@ -31,8 +31,8 @@
              CPDF_RenderStatus* pRenderStatus);
   bool Continue(PauseIndicatorIface* pPause, CPDF_RenderStatus* pRenderStatus);
 
-  RetainPtr<CFX_DIBSource> m_pBitmap;
-  RetainPtr<CFX_DIBSource> m_pMask;
+  RetainPtr<CFX_DIBBase> m_pBitmap;
+  RetainPtr<CFX_DIBBase> m_pMask;
   uint32_t m_MatteColor;
   bool m_bCached;
 
diff --git a/core/fpdfapi/render/cpdf_imagerenderer.cpp b/core/fpdfapi/render/cpdf_imagerenderer.cpp
index 9f14e84..33aca42 100644
--- a/core/fpdfapi/render/cpdf_imagerenderer.cpp
+++ b/core/fpdfapi/render/cpdf_imagerenderer.cpp
@@ -19,7 +19,7 @@
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
 #include "core/fpdfapi/parser/cpdf_document.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
 #include "core/fpdfapi/render/cpdf_rendercontext.h"
 #include "core/fpdfapi/render/cpdf_renderstatus.h"
@@ -29,8 +29,8 @@
 #include "core/fxcrt/maybe_owned.h"
 #include "core/fxge/cfx_defaultrenderdevice.h"
 #include "core/fxge/cfx_pathdata.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "core/fxge/dib/cfx_dibitmap.h"
-#include "core/fxge/dib/cfx_dibsource.h"
 #include "core/fxge/dib/cfx_imagestretcher.h"
 #include "core/fxge/dib/cfx_imagetransformer.h"
 #include "third_party/base/ptr_util.h"
@@ -53,7 +53,7 @@
 
 CPDF_ImageRenderer::~CPDF_ImageRenderer() {}
 
-bool CPDF_ImageRenderer::StartLoadDIBSource() {
+bool CPDF_ImageRenderer::StartLoadDIBBase() {
   CFX_FloatRect image_rect_f = m_ImageMatrix.GetUnitRect();
   FX_RECT image_rect = image_rect_f.GetOuterRect();
   if (!image_rect.Valid())
@@ -69,13 +69,13 @@
   return false;
 }
 
-bool CPDF_ImageRenderer::StartRenderDIBSource() {
+bool CPDF_ImageRenderer::StartRenderDIBBase() {
   if (!m_Loader.m_pBitmap)
     return false;
 
   CPDF_GeneralState& state = m_pImageObject->m_GeneralState;
   m_BitmapAlpha = FXSYS_round(255 * state.GetFillAlpha());
-  m_pDIBSource = m_Loader.m_pBitmap;
+  m_pDIBBase = m_Loader.m_pBitmap;
   if (m_pRenderStatus->GetRenderOptions().ColorModeIs(
           CPDF_RenderOptions::kAlpha) &&
       !m_Loader.m_pMask) {
@@ -86,7 +86,7 @@
       state.SetTransferFunc(m_pRenderStatus->GetTransferFunc(state.GetTR()));
 
     if (state.GetTransferFunc() && !state.GetTransferFunc()->GetIdentity()) {
-      m_pDIBSource = m_Loader.m_pBitmap =
+      m_pDIBBase = m_Loader.m_pBitmap =
           state.GetTransferFunc()->TranslateImage(m_Loader.m_pBitmap);
       if (m_Loader.m_bCached && m_Loader.m_pMask)
         m_Loader.m_pMask = m_Loader.m_pMask->Clone(nullptr);
@@ -96,7 +96,7 @@
   m_FillArgb = 0;
   m_bPatternColor = false;
   m_pPattern = nullptr;
-  if (m_pDIBSource->IsAlphaMask()) {
+  if (m_pDIBBase->IsAlphaMask()) {
     const CPDF_Color* pColor = m_pImageObject->m_ColorState.GetFillColor();
     if (pColor && pColor->IsPattern()) {
       m_pPattern = pColor->GetPattern();
@@ -106,12 +106,12 @@
     m_FillArgb = m_pRenderStatus->GetFillArgb(m_pImageObject.Get());
   } else if (m_pRenderStatus->GetRenderOptions().ColorModeIs(
                  CPDF_RenderOptions::kGray)) {
-    RetainPtr<CFX_DIBitmap> pClone = m_pDIBSource->Clone(nullptr);
+    RetainPtr<CFX_DIBitmap> pClone = m_pDIBBase->Clone(nullptr);
     if (!pClone)
       return false;
 
     pClone->ConvertColorScale(0xffffff, 0);
-    m_pDIBSource = pClone;
+    m_pDIBBase = pClone;
   }
   m_Flags = 0;
   if (m_pRenderStatus->GetRenderOptions().HasFlag(RENDER_FORCE_DOWNSAMPLE))
@@ -136,7 +136,7 @@
   if (m_BitmapAlpha != 255 || !state.HasRef() || !state.GetFillOP() ||
       state.GetOPMode() != 0 || state.GetBlendType() != FXDIB_BLEND_NORMAL ||
       state.GetStrokeAlpha() != 1.0f || state.GetFillAlpha() != 1.0f) {
-    return StartDIBSource();
+    return StartDIBBase();
   }
   CPDF_Document* pDocument = nullptr;
   CPDF_Page* pPage = nullptr;
@@ -154,14 +154,14 @@
   CPDF_ColorSpace* pColorSpace =
       pDocument->LoadColorSpace(pCSObj, pPageResources);
   if (!pColorSpace)
-    return StartDIBSource();
+    return StartDIBBase();
   int format = pColorSpace->GetFamily();
   if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
       format == PDFCS_DEVICEN) {
     m_BlendType = FXDIB_BLEND_DARKEN;
   }
   pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
-  return StartDIBSource();
+  return StartDIBBase();
 }
 
 bool CPDF_ImageRenderer::Start(CPDF_RenderStatus* pStatus,
@@ -183,13 +183,13 @@
   }
   m_ImageMatrix = m_pImageObject->matrix();
   m_ImageMatrix.Concat(*pObj2Device);
-  if (StartLoadDIBSource())
+  if (StartLoadDIBBase())
     return true;
-  return StartRenderDIBSource();
+  return StartRenderDIBBase();
 }
 
 bool CPDF_ImageRenderer::Start(CPDF_RenderStatus* pStatus,
-                               const RetainPtr<CFX_DIBSource>& pDIBSource,
+                               const RetainPtr<CFX_DIBBase>& pDIBBase,
                                FX_ARGB bitmap_argb,
                                int bitmap_alpha,
                                const CFX_Matrix* pImage2Device,
@@ -197,14 +197,14 @@
                                bool bStdCS,
                                int blendType) {
   m_pRenderStatus = pStatus;
-  m_pDIBSource = pDIBSource;
+  m_pDIBBase = pDIBBase;
   m_FillArgb = bitmap_argb;
   m_BitmapAlpha = bitmap_alpha;
   m_ImageMatrix = *pImage2Device;
   m_Flags = flags;
   m_bStdCS = bStdCS;
   m_BlendType = blendType;
-  return StartDIBSource();
+  return StartDIBBase();
 }
 
 bool CPDF_ImageRenderer::NotDrawing() const {
@@ -228,7 +228,7 @@
 void CPDF_ImageRenderer::CalculateDrawImage(
     CFX_DefaultRenderDevice* pBitmapDevice1,
     CFX_DefaultRenderDevice* pBitmapDevice2,
-    const RetainPtr<CFX_DIBSource>& pDIBSource,
+    const RetainPtr<CFX_DIBBase>& pDIBBase,
     CFX_Matrix* pNewMatrix,
     const FX_RECT& rect) const {
   CPDF_RenderStatus bitmap_render(m_pRenderStatus->GetContext(),
@@ -238,8 +238,8 @@
   bitmap_render.Initialize(nullptr, nullptr);
 
   CPDF_ImageRenderer image_render;
-  if (image_render.Start(&bitmap_render, pDIBSource, 0xffffffff, 255,
-                         pNewMatrix, m_Flags, true, FXDIB_BLEND_NORMAL)) {
+  if (image_render.Start(&bitmap_render, pDIBBase, 0xffffffff, 255, pNewMatrix,
+                         m_Flags, true, FXDIB_BLEND_NORMAL)) {
     image_render.Continue(nullptr);
   }
   if (m_Loader.m_MatteColor == 0xffffffff)
@@ -309,8 +309,8 @@
     return true;
   }
   bitmap_device2.GetBitmap()->Clear(0);
-  CalculateDrawImage(&bitmap_device1, &bitmap_device2, m_pDIBSource,
-                     &new_matrix, rect);
+  CalculateDrawImage(&bitmap_device1, &bitmap_device2, m_pDIBBase, &new_matrix,
+                     rect);
   bitmap_device2.GetBitmap()->ConvertFormat(FXDIB_8bppMask);
   bitmap_device1.GetBitmap()->MultiplyAlpha(bitmap_device2.GetBitmap());
   bitmap_device1.GetBitmap()->MultiplyAlpha(255);
@@ -345,7 +345,7 @@
   bitmap_render.SetStdCS(true);
   bitmap_render.Initialize(nullptr, nullptr);
   CPDF_ImageRenderer image_render;
-  if (image_render.Start(&bitmap_render, m_pDIBSource, 0, 255, &new_matrix,
+  if (image_render.Start(&bitmap_render, m_pDIBBase, 0, 255, &new_matrix,
                          m_Flags, true, FXDIB_BLEND_NORMAL)) {
     image_render.Continue(nullptr);
   }
@@ -376,12 +376,12 @@
   return false;
 }
 
-bool CPDF_ImageRenderer::StartDIBSource() {
-  if (!(m_Flags & RENDER_FORCE_DOWNSAMPLE) && m_pDIBSource->GetBPP() > 1) {
-    FX_SAFE_SIZE_T image_size = m_pDIBSource->GetBPP();
+bool CPDF_ImageRenderer::StartDIBBase() {
+  if (!(m_Flags & RENDER_FORCE_DOWNSAMPLE) && m_pDIBBase->GetBPP() > 1) {
+    FX_SAFE_SIZE_T image_size = m_pDIBBase->GetBPP();
     image_size /= 8;
-    image_size *= m_pDIBSource->GetWidth();
-    image_size *= m_pDIBSource->GetHeight();
+    image_size *= m_pDIBBase->GetWidth();
+    image_size *= m_pDIBBase->GetHeight();
     if (!image_size.IsValid())
       return false;
 
@@ -391,8 +391,8 @@
     }
   }
 #ifdef _SKIA_SUPPORT_
-  RetainPtr<CFX_DIBitmap> premultiplied = m_pDIBSource->Clone(nullptr);
-  if (m_pDIBSource->HasAlpha())
+  RetainPtr<CFX_DIBitmap> premultiplied = m_pDIBBase->Clone(nullptr);
+  if (m_pDIBBase->HasAlpha())
     CFX_SkiaDeviceDriver::PreMultiply(premultiplied);
   if (m_pRenderStatus->GetRenderDevice()->StartDIBitsWithBlend(
           premultiplied, m_BitmapAlpha, m_FillArgb, &m_ImageMatrix, m_Flags,
@@ -405,7 +405,7 @@
   }
 #else
   if (m_pRenderStatus->GetRenderDevice()->StartDIBitsWithBlend(
-          m_pDIBSource, m_BitmapAlpha, m_FillArgb, &m_ImageMatrix, m_Flags,
+          m_pDIBBase, m_BitmapAlpha, m_FillArgb, &m_ImageMatrix, m_Flags,
           &m_DeviceHandle, m_BlendType)) {
     if (m_DeviceHandle) {
       m_Status = 3;
@@ -429,7 +429,7 @@
     clip_box.Intersect(image_rect);
     m_Status = 2;
     m_pTransformer = pdfium::MakeUnique<CFX_ImageTransformer>(
-        m_pDIBSource, &m_ImageMatrix, m_Flags, &clip_box);
+        m_pDIBBase, &m_ImageMatrix, m_Flags, &clip_box);
     return true;
   }
   if (m_ImageMatrix.a < 0)
@@ -440,18 +440,18 @@
 
   int dest_left = dest_width > 0 ? image_rect.left : image_rect.right;
   int dest_top = dest_height > 0 ? image_rect.top : image_rect.bottom;
-  if (m_pDIBSource->IsOpaqueImage() && m_BitmapAlpha == 255) {
+  if (m_pDIBBase->IsOpaqueImage() && m_BitmapAlpha == 255) {
     if (m_pRenderStatus->GetRenderDevice()->StretchDIBitsWithFlagsAndBlend(
-            m_pDIBSource, dest_left, dest_top, dest_width, dest_height, m_Flags,
+            m_pDIBBase, dest_left, dest_top, dest_width, dest_height, m_Flags,
             m_BlendType)) {
       return false;
     }
   }
-  if (m_pDIBSource->IsAlphaMask()) {
+  if (m_pDIBBase->IsAlphaMask()) {
     if (m_BitmapAlpha != 255)
       m_FillArgb = FXARGB_MUL_ALPHA(m_FillArgb, m_BitmapAlpha);
     if (m_pRenderStatus->GetRenderDevice()->StretchBitMaskWithFlags(
-            m_pDIBSource, dest_left, dest_top, dest_width, dest_height,
+            m_pDIBBase, dest_left, dest_top, dest_width, dest_height,
             m_FillArgb, m_Flags)) {
       return false;
     }
@@ -468,7 +468,7 @@
       dest_rect.left - image_rect.left, dest_rect.top - image_rect.top,
       dest_rect.right - image_rect.left, dest_rect.bottom - image_rect.top);
   RetainPtr<CFX_DIBitmap> pStretched =
-      m_pDIBSource->StretchTo(dest_width, dest_height, m_Flags, &dest_clip);
+      m_pDIBBase->StretchTo(dest_width, dest_height, m_Flags, &dest_clip);
   if (pStretched) {
     m_pRenderStatus->CompositeDIBitmap(pStretched, dest_rect.left,
                                        dest_rect.top, m_FillArgb, m_BitmapAlpha,
@@ -478,7 +478,7 @@
 }
 
 bool CPDF_ImageRenderer::StartBitmapAlpha() {
-  if (m_pDIBSource->IsOpaqueImage()) {
+  if (m_pDIBBase->IsOpaqueImage()) {
     CFX_PathData path;
     path.AppendRect(0, 0, 1, 1);
     path.Transform(&m_ImageMatrix);
@@ -488,11 +488,11 @@
                                                  fill_color, 0, FXFILL_WINDING);
     return false;
   }
-  RetainPtr<CFX_DIBSource> pAlphaMask;
-  if (m_pDIBSource->IsAlphaMask())
-    pAlphaMask = m_pDIBSource;
+  RetainPtr<CFX_DIBBase> pAlphaMask;
+  if (m_pDIBBase->IsAlphaMask())
+    pAlphaMask = m_pDIBBase;
   else
-    pAlphaMask = m_pDIBSource->CloneAlphaMask();
+    pAlphaMask = m_pDIBBase->CloneAlphaMask();
 
   if (fabs(m_ImageMatrix.b) >= 0.5f || fabs(m_ImageMatrix.c) >= 0.5f) {
     int left;
@@ -554,7 +554,7 @@
     if (m_Loader.Continue(pPause, m_pRenderStatus.Get()))
       return true;
 
-    if (StartRenderDIBSource())
+    if (StartRenderDIBBase())
       return Continue(pPause);
   }
   return false;
diff --git a/core/fpdfapi/render/cpdf_imagerenderer.h b/core/fpdfapi/render/cpdf_imagerenderer.h
index e6c6d0c..c6ccb0c 100644
--- a/core/fpdfapi/render/cpdf_imagerenderer.h
+++ b/core/fpdfapi/render/cpdf_imagerenderer.h
@@ -15,7 +15,7 @@
 #include "core/fxge/dib/cfx_imagerenderer.h"
 
 class CFX_DIBitmap;
-class CFX_DIBSource;
+class CFX_DIBBase;
 class CFX_DefaultRenderDevice;
 class CFX_ImageTransformer;
 class CPDF_ImageObject;
@@ -35,7 +35,7 @@
              int blendType);
 
   bool Start(CPDF_RenderStatus* pStatus,
-             const RetainPtr<CFX_DIBSource>& pDIBSource,
+             const RetainPtr<CFX_DIBBase>& pDIBBase,
              FX_ARGB bitmap_argb,
              int bitmap_alpha,
              const CFX_Matrix* pImage2Device,
@@ -48,9 +48,9 @@
 
  private:
   bool StartBitmapAlpha();
-  bool StartDIBSource();
-  bool StartRenderDIBSource();
-  bool StartLoadDIBSource();
+  bool StartDIBBase();
+  bool StartRenderDIBBase();
+  bool StartLoadDIBBase();
   bool DrawMaskedImage();
   bool DrawPatternImage(const CFX_Matrix* pObj2Device);
   bool NotDrawing() const;
@@ -58,7 +58,7 @@
   CFX_Matrix GetDrawMatrix(const FX_RECT& rect) const;
   void CalculateDrawImage(CFX_DefaultRenderDevice* bitmap_device1,
                           CFX_DefaultRenderDevice* bitmap_device2,
-                          const RetainPtr<CFX_DIBSource>& pDIBSource,
+                          const RetainPtr<CFX_DIBBase>& pDIBBase,
                           CFX_Matrix* pNewMatrix,
                           const FX_RECT& rect) const;
   void HandleFilters();
@@ -69,7 +69,7 @@
   UnownedPtr<const CFX_Matrix> m_pObj2Device;
   CFX_Matrix m_ImageMatrix;
   CPDF_ImageLoader m_Loader;
-  RetainPtr<CFX_DIBSource> m_pDIBSource;
+  RetainPtr<CFX_DIBBase> m_pDIBBase;
   int m_BitmapAlpha;
   bool m_bPatternColor;
   UnownedPtr<CPDF_Pattern> m_pPattern;
diff --git a/core/fpdfapi/render/cpdf_pagerendercache.cpp b/core/fpdfapi/render/cpdf_pagerendercache.cpp
index 1358943..61602d3 100644
--- a/core/fpdfapi/render/cpdf_pagerendercache.cpp
+++ b/core/fpdfapi/render/cpdf_pagerendercache.cpp
@@ -94,17 +94,17 @@
     m_pCurImageCacheEntry =
         new CPDF_ImageCacheEntry(m_pPage->GetDocument(), pImage);
   }
-  CPDF_DIBSource::LoadState ret = m_pCurImageCacheEntry->StartGetCachedBitmap(
+  CPDF_DIBBase::LoadState ret = m_pCurImageCacheEntry->StartGetCachedBitmap(
       pRenderStatus->GetFormResource(), m_pPage->m_pPageResources.Get(), bStdCS,
       GroupFamily, bLoadMask, pRenderStatus);
-  if (ret == CPDF_DIBSource::LoadState::kContinue)
+  if (ret == CPDF_DIBBase::LoadState::kContinue)
     return true;
 
   m_nTimeCount++;
   if (!m_bCurFindCache)
     m_ImageCache[pStream] = m_pCurImageCacheEntry;
 
-  if (ret == CPDF_DIBSource::LoadState::kFail)
+  if (ret == CPDF_DIBBase::LoadState::kFail)
     m_nCacheSize += m_pCurImageCacheEntry->EstimateSize();
 
   return false;
diff --git a/core/fpdfapi/render/cpdf_renderstatus.cpp b/core/fpdfapi/render/cpdf_renderstatus.cpp
index 2cbe495..9965cbb 100644
--- a/core/fpdfapi/render/cpdf_renderstatus.cpp
+++ b/core/fpdfapi/render/cpdf_renderstatus.cpp
@@ -37,7 +37,7 @@
 #include "core/fpdfapi/parser/cpdf_document.h"
 #include "core/fpdfapi/render/cpdf_charposlist.h"
 #include "core/fpdfapi/render/cpdf_devicebuffer.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fpdfapi/render/cpdf_docrenderdata.h"
 #include "core/fpdfapi/render/cpdf_imagerenderer.h"
 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
@@ -1582,7 +1582,7 @@
   if (pSMaskDict) {
     CFX_Matrix smask_matrix = *pPageObj->m_GeneralState.GetSMaskMatrix();
     smask_matrix.Concat(*pObj2Device);
-    RetainPtr<CFX_DIBSource> pSMaskSource =
+    RetainPtr<CFX_DIBBase> pSMaskSource =
         LoadSMask(pSMaskDict, &rect, &smask_matrix);
     if (pSMaskSource)
       bitmap->MultiplyAlpha(pSMaskSource);
diff --git a/core/fpdfapi/render/cpdf_transferfunc.cpp b/core/fpdfapi/render/cpdf_transferfunc.cpp
index 2571743..f67f508 100644
--- a/core/fpdfapi/render/cpdf_transferfunc.cpp
+++ b/core/fpdfapi/render/cpdf_transferfunc.cpp
@@ -8,7 +8,7 @@
 
 #include "core/fpdfapi/parser/cpdf_document.h"
 #include "core/fpdfapi/render/cpdf_dibtransferfunc.h"
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 
 CPDF_TransferFunc::CPDF_TransferFunc(CPDF_Document* pDoc) : m_pPDFDoc(pDoc) {}
 
@@ -20,8 +20,8 @@
                    m_Samples[FXSYS_GetRValue(colorref)]);
 }
 
-RetainPtr<CFX_DIBSource> CPDF_TransferFunc::TranslateImage(
-    const RetainPtr<CFX_DIBSource>& pSrc) {
+RetainPtr<CFX_DIBBase> CPDF_TransferFunc::TranslateImage(
+    const RetainPtr<CFX_DIBBase>& pSrc) {
   RetainPtr<CPDF_TransferFunc> pHolder(this);
   auto pDest = pdfium::MakeRetain<CPDF_DIBTransferFunc>(pHolder);
   pDest->LoadSrc(pSrc);
diff --git a/core/fpdfapi/render/cpdf_transferfunc.h b/core/fpdfapi/render/cpdf_transferfunc.h
index dfc186e..e896472 100644
--- a/core/fpdfapi/render/cpdf_transferfunc.h
+++ b/core/fpdfapi/render/cpdf_transferfunc.h
@@ -12,7 +12,7 @@
 #include "core/fxge/fx_dib.h"
 
 class CPDF_Document;
-class CFX_DIBSource;
+class CFX_DIBBase;
 
 class CPDF_TransferFunc : public Retainable {
  public:
@@ -20,7 +20,7 @@
   friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
 
   FX_COLORREF TranslateColor(FX_COLORREF colorref) const;
-  RetainPtr<CFX_DIBSource> TranslateImage(const RetainPtr<CFX_DIBSource>& pSrc);
+  RetainPtr<CFX_DIBBase> TranslateImage(const RetainPtr<CFX_DIBBase>& pSrc);
 
   const CPDF_Document* GetDocument() const { return m_pPDFDoc.Get(); }
 
diff --git a/core/fxcodec/codec/ccodec_jpegmodule.h b/core/fxcodec/codec/ccodec_jpegmodule.h
index 06cd224..d990ee9 100644
--- a/core/fxcodec/codec/ccodec_jpegmodule.h
+++ b/core/fxcodec/codec/ccodec_jpegmodule.h
@@ -14,7 +14,7 @@
 #include "core/fxcrt/retain_ptr.h"
 
 class CCodec_ScanlineDecoder;
-class CFX_DIBSource;
+class CFX_DIBBase;
 
 #ifdef PDF_ENABLE_XFA
 class CFX_DIBAttribute;
@@ -58,7 +58,7 @@
   uint32_t GetAvailInput(Context* pContext, uint8_t** avail_buf_ptr);
 
 #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
-  static bool JpegEncode(const RetainPtr<CFX_DIBSource>& pSource,
+  static bool JpegEncode(const RetainPtr<CFX_DIBBase>& pSource,
                          uint8_t** dest_buf,
                          size_t* dest_size);
 #endif  // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
diff --git a/core/fxcodec/codec/fx_codec_jpeg.cpp b/core/fxcodec/codec/fx_codec_jpeg.cpp
index f0b8d66..4c37465 100644
--- a/core/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/fxcodec/codec/fx_codec_jpeg.cpp
@@ -13,7 +13,7 @@
 #include "core/fxcodec/codec/ccodec_scanlinedecoder.h"
 #include "core/fxcodec/fx_codec.h"
 #include "core/fxcrt/fx_safe_types.h"
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "core/fxge/fx_dib.h"
 #include "third_party/base/logging.h"
 #include "third_party/base/ptr_util.h"
@@ -493,7 +493,7 @@
 
 #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
 #define JPEG_BLOCK_SIZE 1048576
-bool CCodec_JpegModule::JpegEncode(const RetainPtr<CFX_DIBSource>& pSource,
+bool CCodec_JpegModule::JpegEncode(const RetainPtr<CFX_DIBBase>& pSource,
                                    uint8_t** dest_buf,
                                    size_t* dest_size) {
   struct jpeg_error_mgr jerr;
diff --git a/core/fxcodec/fx_codec.h b/core/fxcodec/fx_codec.h
index 1eaf846..0a0c08a 100644
--- a/core/fxcodec/fx_codec.h
+++ b/core/fxcodec/fx_codec.h
@@ -43,7 +43,7 @@
 class CCodec_Jbig2Module;
 class CCodec_JpegModule;
 class CCodec_JpxModule;
-class CFX_DIBSource;
+class CFX_DIBBase;
 class CJPX_Decoder;
 class CPDF_ColorSpace;
 class CPDF_StreamAcc;
diff --git a/core/fxge/agg/fx_agg_driver.cpp b/core/fxge/agg/fx_agg_driver.cpp
index 9166fbb..063f36d 100644
--- a/core/fxge/agg/fx_agg_driver.cpp
+++ b/core/fxge/agg/fx_agg_driver.cpp
@@ -144,7 +144,7 @@
                                 int dest_top,
                                 int width,
                                 int height,
-                                const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                 int src_left,
                                 int src_top) {
   if (!pBitmap)
@@ -1491,7 +1491,7 @@
   return m_pBackdropBitmap;
 }
 
-bool CFX_AggDeviceDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CFX_AggDeviceDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                     uint32_t argb,
                                     const FX_RECT* pSrcRect,
                                     int left,
@@ -1511,7 +1511,7 @@
       pSrcRect->top, blend_type, m_pClipRgn.get(), m_bRgbByteOrder);
 }
 
-bool CFX_AggDeviceDriver::StretchDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CFX_AggDeviceDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                         uint32_t argb,
                                         int dest_left,
                                         int dest_top,
@@ -1545,7 +1545,7 @@
 }
 
 bool CFX_AggDeviceDriver::StartDIBits(
-    const RetainPtr<CFX_DIBSource>& pSource,
+    const RetainPtr<CFX_DIBBase>& pSource,
     int bitmap_alpha,
     uint32_t argb,
     const CFX_Matrix* pMatrix,
diff --git a/core/fxge/agg/fx_agg_driver.h b/core/fxge/agg/fx_agg_driver.h
index b59cec0..167b211 100644
--- a/core/fxge/agg/fx_agg_driver.h
+++ b/core/fxge/agg/fx_agg_driver.h
@@ -67,13 +67,13 @@
                  int left,
                  int top) override;
   RetainPtr<CFX_DIBitmap> GetBackDrop() override;
-  bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
                  const FX_RECT* pSrcRect,
                  int left,
                  int top,
                  int blend_type) override;
-  bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                      uint32_t color,
                      int dest_left,
                      int dest_top,
@@ -82,7 +82,7 @@
                      const FX_RECT* pClipRect,
                      uint32_t flags,
                      int blend_type) override;
-  bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                    int bitmap_alpha,
                    uint32_t color,
                    const CFX_Matrix* pMatrix,
diff --git a/core/fxge/cfx_defaultrenderdevice.h b/core/fxge/cfx_defaultrenderdevice.h
index 6510e41..07e3cc5 100644
--- a/core/fxge/cfx_defaultrenderdevice.h
+++ b/core/fxge/cfx_defaultrenderdevice.h
@@ -31,8 +31,8 @@
   void Clear(uint32_t color);
   SkPictureRecorder* CreateRecorder(int size_x, int size_y);
   void DebugVerifyBitmapIsPreMultiplied() const override;
-  bool SetBitsWithMask(const RetainPtr<CFX_DIBSource>& pBitmap,
-                       const RetainPtr<CFX_DIBSource>& pMask,
+  bool SetBitsWithMask(const RetainPtr<CFX_DIBBase>& pBitmap,
+                       const RetainPtr<CFX_DIBBase>& pMask,
                        int left,
                        int top,
                        int bitmap_alpha,
diff --git a/core/fxge/cfx_renderdevice.cpp b/core/fxge/cfx_renderdevice.cpp
index 16d7237..ab57391 100644
--- a/core/fxge/cfx_renderdevice.cpp
+++ b/core/fxge/cfx_renderdevice.cpp
@@ -722,11 +722,10 @@
   return m_pDeviceDriver->GetBackDrop();
 }
 
-bool CFX_RenderDevice::SetDIBitsWithBlend(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
-    int left,
-    int top,
-    int blend_mode) {
+bool CFX_RenderDevice::SetDIBitsWithBlend(const RetainPtr<CFX_DIBBase>& pBitmap,
+                                          int left,
+                                          int top,
+                                          int blend_mode) {
   ASSERT(!pBitmap->IsAlphaMask());
   FX_RECT dest_rect(left, top, left + pBitmap->GetWidth(),
                     top + pBitmap->GetHeight());
@@ -767,7 +766,7 @@
 }
 
 bool CFX_RenderDevice::StretchDIBitsWithFlagsAndBlend(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
+    const RetainPtr<CFX_DIBBase>& pBitmap,
     int left,
     int top,
     int dest_width,
@@ -782,7 +781,7 @@
                                    dest_height, &clip_box, flags, blend_mode);
 }
 
-bool CFX_RenderDevice::SetBitMask(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CFX_RenderDevice::SetBitMask(const RetainPtr<CFX_DIBBase>& pBitmap,
                                   int left,
                                   int top,
                                   uint32_t argb) {
@@ -791,7 +790,7 @@
                                     FXDIB_BLEND_NORMAL);
 }
 
-bool CFX_RenderDevice::StretchBitMask(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CFX_RenderDevice::StretchBitMask(const RetainPtr<CFX_DIBBase>& pBitmap,
                                       int left,
                                       int top,
                                       int dest_width,
@@ -802,7 +801,7 @@
 }
 
 bool CFX_RenderDevice::StretchBitMaskWithFlags(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
+    const RetainPtr<CFX_DIBBase>& pBitmap,
     int left,
     int top,
     int dest_width,
@@ -818,7 +817,7 @@
 }
 
 bool CFX_RenderDevice::StartDIBitsWithBlend(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
+    const RetainPtr<CFX_DIBBase>& pBitmap,
     int bitmap_alpha,
     uint32_t argb,
     const CFX_Matrix* pMatrix,
@@ -839,8 +838,8 @@
   SkASSERT(0);
 }
 
-bool CFX_RenderDevice::SetBitsWithMask(const RetainPtr<CFX_DIBSource>& pBitmap,
-                                       const RetainPtr<CFX_DIBSource>& pMask,
+bool CFX_RenderDevice::SetBitsWithMask(const RetainPtr<CFX_DIBBase>& pBitmap,
+                                       const RetainPtr<CFX_DIBBase>& pMask,
                                        int left,
                                        int top,
                                        int bitmap_alpha,
diff --git a/core/fxge/cfx_renderdevice.h b/core/fxge/cfx_renderdevice.h
index 1d6fe48..f0d7898 100644
--- a/core/fxge/cfx_renderdevice.h
+++ b/core/fxge/cfx_renderdevice.h
@@ -153,14 +153,14 @@
 
   RetainPtr<CFX_DIBitmap> GetBackDrop();
   bool GetDIBits(const RetainPtr<CFX_DIBitmap>& pBitmap, int left, int top);
-  bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap, int left, int top) {
+  bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap, int left, int top) {
     return SetDIBitsWithBlend(pBitmap, left, top, FXDIB_BLEND_NORMAL);
   }
-  bool SetDIBitsWithBlend(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetDIBitsWithBlend(const RetainPtr<CFX_DIBBase>& pBitmap,
                           int left,
                           int top,
                           int blend_type);
-  bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                      int left,
                      int top,
                      int dest_width,
@@ -168,31 +168,31 @@
     return StretchDIBitsWithFlagsAndBlend(pBitmap, left, top, dest_width,
                                           dest_height, 0, FXDIB_BLEND_NORMAL);
   }
-  bool StretchDIBitsWithFlagsAndBlend(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBitsWithFlagsAndBlend(const RetainPtr<CFX_DIBBase>& pBitmap,
                                       int left,
                                       int top,
                                       int dest_width,
                                       int dest_height,
                                       uint32_t flags,
                                       int blend_type);
-  bool SetBitMask(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetBitMask(const RetainPtr<CFX_DIBBase>& pBitmap,
                   int left,
                   int top,
                   uint32_t color);
-  bool StretchBitMask(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchBitMask(const RetainPtr<CFX_DIBBase>& pBitmap,
                       int left,
                       int top,
                       int dest_width,
                       int dest_height,
                       uint32_t color);
-  bool StretchBitMaskWithFlags(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchBitMaskWithFlags(const RetainPtr<CFX_DIBBase>& pBitmap,
                                int left,
                                int top,
                                int dest_width,
                                int dest_height,
                                uint32_t color,
                                uint32_t flags);
-  bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                    int bitmap_alpha,
                    uint32_t color,
                    const CFX_Matrix* pMatrix,
@@ -201,7 +201,7 @@
     return StartDIBitsWithBlend(pBitmap, bitmap_alpha, color, pMatrix, flags,
                                 handle, FXDIB_BLEND_NORMAL);
   }
-  bool StartDIBitsWithBlend(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StartDIBitsWithBlend(const RetainPtr<CFX_DIBBase>& pBitmap,
                             int bitmap_alpha,
                             uint32_t color,
                             const CFX_Matrix* pMatrix,
@@ -266,8 +266,8 @@
 
 #ifdef _SKIA_SUPPORT_
   virtual void DebugVerifyBitmapIsPreMultiplied() const;
-  virtual bool SetBitsWithMask(const RetainPtr<CFX_DIBSource>& pBitmap,
-                               const RetainPtr<CFX_DIBSource>& pMask,
+  virtual bool SetBitsWithMask(const RetainPtr<CFX_DIBBase>& pBitmap,
+                               const RetainPtr<CFX_DIBBase>& pMask,
                                int left,
                                int top,
                                int bitmap_alpha,
diff --git a/core/fxge/dib/cfx_dibsource.cpp b/core/fxge/dib/cfx_dibbase.cpp
similarity index 91%
rename from core/fxge/dib/cfx_dibsource.cpp
rename to core/fxge/dib/cfx_dibbase.cpp
index 4608b51..79150ba 100644
--- a/core/fxge/dib/cfx_dibsource.cpp
+++ b/core/fxge/dib/cfx_dibbase.cpp
@@ -4,7 +4,7 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 
 #include <algorithm>
 #include <memory>
@@ -49,7 +49,7 @@
 
 class CFX_Palette {
  public:
-  explicit CFX_Palette(const RetainPtr<CFX_DIBSource>& pBitmap);
+  explicit CFX_Palette(const RetainPtr<CFX_DIBBase>& pBitmap);
   ~CFX_Palette();
 
   const uint32_t* GetPalette() { return m_Palette.data(); }
@@ -64,7 +64,7 @@
   int m_lut;
 };
 
-CFX_Palette::CFX_Palette(const RetainPtr<CFX_DIBSource>& pBitmap)
+CFX_Palette::CFX_Palette(const RetainPtr<CFX_DIBBase>& pBitmap)
     : m_Palette(256), m_Luts(4096), m_lut(0) {
   int bpp = pBitmap->GetBPP() / 8;
   int width = pBitmap->GetWidth();
@@ -102,7 +102,7 @@
                                  int dest_pitch,
                                  int width,
                                  int height,
-                                 const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                 const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                  int src_left,
                                  int src_top) {
   static constexpr uint8_t kSetGray = 0xff;
@@ -123,7 +123,7 @@
                                  int dest_pitch,
                                  int width,
                                  int height,
-                                 const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                 const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                  int src_left,
                                  int src_top) {
   for (int row = 0; row < height; ++row) {
@@ -137,7 +137,7 @@
                                 int dest_pitch,
                                 int width,
                                 int height,
-                                const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                 int src_left,
                                 int src_top) {
   uint32_t* src_plt = pSrcBitmap->GetPalette();
@@ -182,7 +182,7 @@
                                 int dest_pitch,
                                 int width,
                                 int height,
-                                const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                 int src_left,
                                 int src_top) {
   uint32_t* src_plt = pSrcBitmap->GetPalette();
@@ -216,7 +216,7 @@
                                   int dest_pitch,
                                   int width,
                                   int height,
-                                  const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                  const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                   int src_left,
                                   int src_top) {
   int Bpp = pSrcBitmap->GetBPP() / 8;
@@ -255,7 +255,7 @@
                              int dest_pitch,
                              int width,
                              int height,
-                             const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                             const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                              int src_left,
                              int src_top) {
   if (pSrcBitmap->GetBPP() == 1) {
@@ -286,7 +286,7 @@
                                int dest_pitch,
                                int width,
                                int height,
-                               const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                               const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                int src_left,
                                int src_top,
                                uint32_t* dst_plt) {
@@ -313,7 +313,7 @@
                                int dest_pitch,
                                int width,
                                int height,
-                               const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                               const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                int src_left,
                                int src_top,
                                uint32_t* dst_plt) {
@@ -372,7 +372,7 @@
                                 int dest_pitch,
                                 int width,
                                 int height,
-                                const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                 int src_left,
                                 int src_top) {
   int comps = GetCompsFromFormat(dest_format);
@@ -401,7 +401,7 @@
                                 int dest_pitch,
                                 int width,
                                 int height,
-                                const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                 int src_left,
                                 int src_top) {
   int comps = GetCompsFromFormat(dest_format);
@@ -424,7 +424,7 @@
                                int dest_pitch,
                                int width,
                                int height,
-                               const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                               const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                int src_left,
                                int src_top) {
   int comps = GetCompsFromFormat(dest_format);
@@ -475,7 +475,7 @@
                                int dest_pitch,
                                int width,
                                int height,
-                               const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                               const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                int src_left,
                                int src_top) {
   int comps = GetCompsFromFormat(dest_format);
@@ -518,7 +518,7 @@
                                   int dest_pitch,
                                   int width,
                                   int height,
-                                  const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                  const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                   int src_left,
                                   int src_top) {
   for (int row = 0; row < height; ++row) {
@@ -533,7 +533,7 @@
                                   int dest_pitch,
                                   int width,
                                   int height,
-                                  const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                  const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                   int src_left,
                                   int src_top) {
   for (int row = 0; row < height; ++row) {
@@ -553,7 +553,7 @@
                              int dest_pitch,
                              int width,
                              int height,
-                             const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                             const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                              int src_left,
                              int src_top) {
   int comps = pSrcBitmap->GetBPP() / 8;
@@ -575,7 +575,7 @@
                                    int dest_pitch,
                                    int width,
                                    int height,
-                                   const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                   const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                    int src_left,
                                    int src_top) {
   for (int row = 0; row < height; ++row) {
@@ -596,7 +596,7 @@
                             int dest_pitch,
                             int width,
                             int height,
-                            const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                            const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                             int src_left,
                             int src_top) {
   switch (bpp) {
@@ -634,7 +634,7 @@
                        int dest_pitch,
                        int width,
                        int height,
-                       const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                       const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                        int src_left,
                        int src_top) {
   switch (bpp) {
@@ -676,7 +676,7 @@
                         int dest_pitch,
                         int width,
                         int height,
-                        const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                        const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                         int src_left,
                         int src_top) {
   switch (bpp) {
@@ -715,21 +715,20 @@
 
 }  // namespace
 
-CFX_DIBSource::CFX_DIBSource()
+CFX_DIBBase::CFX_DIBBase()
     : m_Width(0), m_Height(0), m_bpp(0), m_AlphaFlag(0), m_Pitch(0) {}
 
-CFX_DIBSource::~CFX_DIBSource() {}
+CFX_DIBBase::~CFX_DIBBase() {}
 
-uint8_t* CFX_DIBSource::GetBuffer() const {
+uint8_t* CFX_DIBBase::GetBuffer() const {
   return nullptr;
 }
 
-bool CFX_DIBSource::SkipToScanline(int line,
-                                   PauseIndicatorIface* pPause) const {
+bool CFX_DIBBase::SkipToScanline(int line, PauseIndicatorIface* pPause) const {
   return false;
 }
 
-RetainPtr<CFX_DIBitmap> CFX_DIBSource::Clone(const FX_RECT* pClip) const {
+RetainPtr<CFX_DIBitmap> CFX_DIBBase::Clone(const FX_RECT* pClip) const {
   FX_RECT rect(0, 0, m_Width, m_Height);
   if (pClip) {
     rect.Intersect(*pClip);
@@ -770,7 +769,7 @@
   return pNewBitmap;
 }
 
-void CFX_DIBSource::BuildPalette() {
+void CFX_DIBBase::BuildPalette() {
   if (m_pPalette)
     return;
 
@@ -795,7 +794,7 @@
   }
 }
 
-bool CFX_DIBSource::BuildAlphaMask() {
+bool CFX_DIBBase::BuildAlphaMask() {
   if (m_pAlphaMask)
     return true;
 
@@ -809,7 +808,7 @@
   return true;
 }
 
-uint32_t CFX_DIBSource::GetPaletteArgb(int index) const {
+uint32_t CFX_DIBBase::GetPaletteArgb(int index) const {
   ASSERT((GetBPP() == 1 || GetBPP() == 8) && !IsAlphaMask());
   if (m_pPalette)
     return m_pPalette.get()[index];
@@ -826,7 +825,7 @@
   return index * 0x10101 | 0xff000000;
 }
 
-void CFX_DIBSource::SetPaletteArgb(int index, uint32_t color) {
+void CFX_DIBBase::SetPaletteArgb(int index, uint32_t color) {
   ASSERT((GetBPP() == 1 || GetBPP() == 8) && !IsAlphaMask());
   if (!m_pPalette) {
     BuildPalette();
@@ -834,7 +833,7 @@
   m_pPalette.get()[index] = color;
 }
 
-int CFX_DIBSource::FindPalette(uint32_t color) const {
+int CFX_DIBBase::FindPalette(uint32_t color) const {
   ASSERT((GetBPP() == 1 || GetBPP() == 8) && !IsAlphaMask());
   if (!m_pPalette) {
     if (IsCmykImage()) {
@@ -856,15 +855,15 @@
   return -1;
 }
 
-void CFX_DIBSource::GetOverlapRect(int& dest_left,
-                                   int& dest_top,
-                                   int& width,
-                                   int& height,
-                                   int src_width,
-                                   int src_height,
-                                   int& src_left,
-                                   int& src_top,
-                                   const CFX_ClipRgn* pClipRgn) {
+void CFX_DIBBase::GetOverlapRect(int& dest_left,
+                                 int& dest_top,
+                                 int& width,
+                                 int& height,
+                                 int src_width,
+                                 int src_height,
+                                 int& src_left,
+                                 int& src_top,
+                                 const CFX_ClipRgn* pClipRgn) {
   if (width == 0 || height == 0)
     return;
 
@@ -893,7 +892,7 @@
   height = dest_rect.bottom - dest_rect.top;
 }
 
-void CFX_DIBSource::SetPalette(const uint32_t* pSrc) {
+void CFX_DIBBase::SetPalette(const uint32_t* pSrc) {
   static const uint32_t kPaletteSize = 256;
   if (!pSrc || GetBPP() > 8) {
     m_pPalette.reset();
@@ -906,7 +905,7 @@
   memcpy(m_pPalette.get(), pSrc, pal_size * sizeof(uint32_t));
 }
 
-void CFX_DIBSource::GetPalette(uint32_t* pal, int alpha) const {
+void CFX_DIBBase::GetPalette(uint32_t* pal, int alpha) const {
   ASSERT(GetBPP() <= 8 && !IsCmykImage());
   if (GetBPP() == 1) {
     pal[0] = ((m_pPalette ? m_pPalette.get()[0] : 0xff000000) & 0xffffff) |
@@ -924,7 +923,7 @@
   }
 }
 
-RetainPtr<CFX_DIBitmap> CFX_DIBSource::CloneAlphaMask() const {
+RetainPtr<CFX_DIBitmap> CFX_DIBBase::CloneAlphaMask() const {
   ASSERT(GetFormat() == FXDIB_Argb);
   FX_RECT rect(0, 0, m_Width, m_Height);
   auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
@@ -942,8 +941,8 @@
   return pMask;
 }
 
-bool CFX_DIBSource::SetAlphaMask(const RetainPtr<CFX_DIBSource>& pAlphaMask,
-                                 const FX_RECT* pClip) {
+bool CFX_DIBBase::SetAlphaMask(const RetainPtr<CFX_DIBBase>& pAlphaMask,
+                               const FX_RECT* pClip) {
   if (!HasAlpha() || GetFormat() == FXDIB_Argb)
     return false;
 
@@ -970,8 +969,7 @@
   return true;
 }
 
-RetainPtr<CFX_DIBitmap> CFX_DIBSource::FlipImage(bool bXFlip,
-                                                 bool bYFlip) const {
+RetainPtr<CFX_DIBitmap> CFX_DIBBase::FlipImage(bool bXFlip, bool bYFlip) const {
   auto pFlipped = pdfium::MakeRetain<CFX_DIBitmap>();
   if (!pFlipped->Create(m_Width, m_Height, GetFormat()))
     return nullptr;
@@ -1042,7 +1040,7 @@
   return pFlipped;
 }
 
-RetainPtr<CFX_DIBitmap> CFX_DIBSource::CloneConvert(FXDIB_Format dest_format) {
+RetainPtr<CFX_DIBitmap> CFX_DIBBase::CloneConvert(FXDIB_Format dest_format) {
   if (dest_format == GetFormat())
     return Clone(nullptr);
 
@@ -1068,7 +1066,7 @@
       return nullptr;
   }
 
-  RetainPtr<CFX_DIBSource> holder(this);
+  RetainPtr<CFX_DIBBase> holder(this);
   std::unique_ptr<uint32_t, FxFreeDeleter> pal_8bpp;
   if (!ConvertBuffer(dest_format, pClone->GetBuffer(), pClone->GetPitch(),
                      m_Width, m_Height, holder, 0, 0, &pal_8bpp)) {
@@ -1080,7 +1078,7 @@
   return pClone;
 }
 
-RetainPtr<CFX_DIBitmap> CFX_DIBSource::SwapXY(bool bXFlip, bool bYFlip) const {
+RetainPtr<CFX_DIBitmap> CFX_DIBBase::SwapXY(bool bXFlip, bool bYFlip) const {
   FX_RECT dest_clip(0, 0, m_Height, m_Width);
   if (dest_clip.IsEmpty())
     return nullptr;
@@ -1170,11 +1168,10 @@
   return pTransBitmap;
 }
 
-RetainPtr<CFX_DIBitmap> CFX_DIBSource::TransformTo(
-    const CFX_Matrix* pDestMatrix,
-    int* result_left,
-    int* result_top) {
-  RetainPtr<CFX_DIBSource> holder(this);
+RetainPtr<CFX_DIBitmap> CFX_DIBBase::TransformTo(const CFX_Matrix* pDestMatrix,
+                                                 int* result_left,
+                                                 int* result_top) {
+  RetainPtr<CFX_DIBBase> holder(this);
   CFX_ImageTransformer transformer(holder, pDestMatrix, 0, nullptr);
   transformer.Continue(nullptr);
   *result_left = transformer.result().left;
@@ -1182,11 +1179,11 @@
   return transformer.DetachBitmap();
 }
 
-RetainPtr<CFX_DIBitmap> CFX_DIBSource::StretchTo(int dest_width,
-                                                 int dest_height,
-                                                 uint32_t flags,
-                                                 const FX_RECT* pClip) {
-  RetainPtr<CFX_DIBSource> holder(this);
+RetainPtr<CFX_DIBitmap> CFX_DIBBase::StretchTo(int dest_width,
+                                               int dest_height,
+                                               uint32_t flags,
+                                               const FX_RECT* pClip) {
+  RetainPtr<CFX_DIBBase> holder(this);
   FX_RECT clip_rect(0, 0, abs(dest_width), abs(dest_height));
   if (pClip)
     clip_rect.Intersect(*pClip);
@@ -1207,13 +1204,13 @@
 }
 
 // static
-bool CFX_DIBSource::ConvertBuffer(
+bool CFX_DIBBase::ConvertBuffer(
     FXDIB_Format dest_format,
     uint8_t* dest_buf,
     int dest_pitch,
     int width,
     int height,
-    const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+    const RetainPtr<CFX_DIBBase>& pSrcBitmap,
     int src_left,
     int src_top,
     std::unique_ptr<uint32_t, FxFreeDeleter>* p_pal) {
diff --git a/core/fxge/dib/cfx_dibsource.h b/core/fxge/dib/cfx_dibbase.h
similarity index 91%
rename from core/fxge/dib/cfx_dibsource.h
rename to core/fxge/dib/cfx_dibbase.h
index 064dbe2..ef35fc8 100644
--- a/core/fxge/dib/cfx_dibsource.h
+++ b/core/fxge/dib/cfx_dibbase.h
@@ -4,8 +4,8 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef CORE_FXGE_DIB_CFX_DIBSOURCE_H_
-#define CORE_FXGE_DIB_CFX_DIBSOURCE_H_
+#ifndef CORE_FXGE_DIB_CFX_DIBBASE_H_
+#define CORE_FXGE_DIB_CFX_DIBBASE_H_
 
 #include <memory>
 
@@ -29,9 +29,10 @@
 class CFX_DIBitmap;
 class PauseIndicatorIface;
 
-class CFX_DIBSource : public Retainable {
+// Base class for all Device-Indepenent Bitmaps.
+class CFX_DIBBase : public Retainable {
  public:
-  ~CFX_DIBSource() override;
+  ~CFX_DIBBase() override;
 
   virtual uint8_t* GetBuffer() const;
   virtual const uint8_t* GetScanline(int line) const = 0;
@@ -90,7 +91,7 @@
   RetainPtr<CFX_DIBitmap> CloneAlphaMask() const;
 
   // Copies into internally-owned mask.
-  bool SetAlphaMask(const RetainPtr<CFX_DIBSource>& pAlphaMask,
+  bool SetAlphaMask(const RetainPtr<CFX_DIBBase>& pAlphaMask,
                     const FX_RECT* pClip);
 
   void GetOverlapRect(int& dest_left,
@@ -110,14 +111,14 @@
   RetainPtr<CFX_DIBitmap> m_pAlphaMask;
 
  protected:
-  CFX_DIBSource();
+  CFX_DIBBase();
 
   static bool ConvertBuffer(FXDIB_Format dest_format,
                             uint8_t* dest_buf,
                             int dest_pitch,
                             int width,
                             int height,
-                            const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                            const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                             int src_left,
                             int src_top,
                             std::unique_ptr<uint32_t, FxFreeDeleter>* pal);
@@ -136,4 +137,4 @@
   std::unique_ptr<uint32_t, FxFreeDeleter> m_pPalette;
 };
 
-#endif  // CORE_FXGE_DIB_CFX_DIBSOURCE_H_
+#endif  // CORE_FXGE_DIB_CFX_DIBBASE_H_
diff --git a/core/fxge/dib/cfx_dibextractor.cpp b/core/fxge/dib/cfx_dibextractor.cpp
index 9fe3114..8211dc7 100644
--- a/core/fxge/dib/cfx_dibextractor.cpp
+++ b/core/fxge/dib/cfx_dibextractor.cpp
@@ -6,14 +6,14 @@
 
 #include "core/fxge/dib/cfx_dibextractor.h"
 
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 
-CFX_DIBExtractor::CFX_DIBExtractor(const RetainPtr<CFX_DIBSource>& pSrc) {
+CFX_DIBExtractor::CFX_DIBExtractor(const RetainPtr<CFX_DIBBase>& pSrc) {
   if (!pSrc->GetBuffer()) {
     m_pBitmap = pSrc->Clone(nullptr);
     return;
   }
-  RetainPtr<CFX_DIBSource> pOldSrc(pSrc);
+  RetainPtr<CFX_DIBBase> pOldSrc(pSrc);
   m_pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
   if (!m_pBitmap->Create(pOldSrc->GetWidth(), pOldSrc->GetHeight(),
                          pOldSrc->GetFormat(), pOldSrc->GetBuffer(), 0)) {
diff --git a/core/fxge/dib/cfx_dibextractor.h b/core/fxge/dib/cfx_dibextractor.h
index b6c27a7..cd97f20 100644
--- a/core/fxge/dib/cfx_dibextractor.h
+++ b/core/fxge/dib/cfx_dibextractor.h
@@ -10,11 +10,11 @@
 #include "core/fxcrt/retain_ptr.h"
 #include "core/fxge/dib/cfx_dibitmap.h"
 
-class CFX_DIBSource;
+class CFX_DIBBase;
 
 class CFX_DIBExtractor {
  public:
-  explicit CFX_DIBExtractor(const RetainPtr<CFX_DIBSource>& pSrc);
+  explicit CFX_DIBExtractor(const RetainPtr<CFX_DIBBase>& pSrc);
   ~CFX_DIBExtractor();
 
   RetainPtr<CFX_DIBitmap> GetBitmap() { return m_pBitmap; }
diff --git a/core/fxge/dib/cfx_dibitmap.cpp b/core/fxge/dib/cfx_dibitmap.cpp
index 2c99bd1..89cfbb6 100644
--- a/core/fxge/dib/cfx_dibitmap.cpp
+++ b/core/fxge/dib/cfx_dibitmap.cpp
@@ -85,7 +85,7 @@
   return false;
 }
 
-bool CFX_DIBitmap::Copy(const RetainPtr<CFX_DIBSource>& pSrc) {
+bool CFX_DIBitmap::Copy(const RetainPtr<CFX_DIBBase>& pSrc) {
   if (m_pBuffer)
     return false;
 
@@ -188,7 +188,7 @@
                                   int dest_top,
                                   int width,
                                   int height,
-                                  const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                  const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                   int src_left,
                                   int src_top) {
   if (!m_pBuffer)
@@ -223,7 +223,7 @@
     int dest_top,
     int width,
     int height,
-    const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+    const RetainPtr<CFX_DIBBase>& pSrcBitmap,
     int src_left,
     int src_top) {
   if (m_pPalette)
@@ -247,7 +247,7 @@
     int dest_top,
     int width,
     int height,
-    const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+    const RetainPtr<CFX_DIBBase>& pSrcBitmap,
     int src_left,
     int src_top) {
   int Bpp = GetBPP() / 8;
@@ -265,7 +265,7 @@
     int dest_top,
     int width,
     int height,
-    const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+    const RetainPtr<CFX_DIBBase>& pSrcBitmap,
     int src_left,
     int src_top) {
   for (int row = 0; row < height; ++row) {
@@ -283,12 +283,12 @@
 }
 
 bool CFX_DIBitmap::LoadChannel(FXDIB_Channel destChannel,
-                               const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                               const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                FXDIB_Channel srcChannel) {
   if (!m_pBuffer)
     return false;
 
-  RetainPtr<CFX_DIBSource> pSrcClone = pSrcBitmap;
+  RetainPtr<CFX_DIBBase> pSrcClone = pSrcBitmap;
   int srcOffset;
   if (srcChannel == FXDIB_Alpha) {
     if (!pSrcBitmap->HasAlpha() && !pSrcBitmap->IsAlphaMask())
@@ -348,7 +348,7 @@
     destOffset = kChannelOffset[destChannel];
   }
   if (srcChannel == FXDIB_Alpha && pSrcClone->m_pAlphaMask) {
-    RetainPtr<CFX_DIBSource> pAlphaMask = pSrcClone->m_pAlphaMask;
+    RetainPtr<CFX_DIBBase> pAlphaMask = pSrcClone->m_pAlphaMask;
     if (pSrcClone->GetWidth() != m_Width ||
         pSrcClone->GetHeight() != m_Height) {
       if (pAlphaMask) {
@@ -446,7 +446,7 @@
   return true;
 }
 
-bool CFX_DIBitmap::MultiplyAlpha(const RetainPtr<CFX_DIBSource>& pSrcBitmap) {
+bool CFX_DIBitmap::MultiplyAlpha(const RetainPtr<CFX_DIBBase>& pSrcBitmap) {
   if (!m_pBuffer)
     return false;
 
@@ -881,7 +881,7 @@
                                    int dest_top,
                                    int width,
                                    int height,
-                                   const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                   const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                    int src_left,
                                    int src_top,
                                    int blend_type,
@@ -952,7 +952,7 @@
                                  int dest_top,
                                  int width,
                                  int height,
-                                 const RetainPtr<CFX_DIBSource>& pMask,
+                                 const RetainPtr<CFX_DIBBase>& pMask,
                                  uint32_t color,
                                  int src_left,
                                  int src_top,
@@ -1266,7 +1266,7 @@
     }
   }
   bool ret = false;
-  RetainPtr<CFX_DIBSource> holder(this);
+  RetainPtr<CFX_DIBBase> holder(this);
   std::unique_ptr<uint32_t, FxFreeDeleter> pal_8bpp;
   ret = ConvertBuffer(dest_format, dest_buf.get(), dest_pitch, m_Width,
                       m_Height, holder, 0, 0, &pal_8bpp);
diff --git a/core/fxge/dib/cfx_dibitmap.h b/core/fxge/dib/cfx_dibitmap.h
index d9afee6..dc6720e 100644
--- a/core/fxge/dib/cfx_dibitmap.h
+++ b/core/fxge/dib/cfx_dibitmap.h
@@ -10,10 +10,10 @@
 #include "core/fxcrt/fx_coordinates.h"
 #include "core/fxcrt/maybe_owned.h"
 #include "core/fxcrt/retain_ptr.h"
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "third_party/base/stl_util.h"
 
-class CFX_DIBitmap : public CFX_DIBSource {
+class CFX_DIBitmap : public CFX_DIBBase {
  public:
   template <typename T, typename... Args>
   friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
@@ -26,9 +26,9 @@
               uint8_t* pBuffer,
               uint32_t pitch);
 
-  bool Copy(const RetainPtr<CFX_DIBSource>& pSrc);
+  bool Copy(const RetainPtr<CFX_DIBBase>& pSrc);
 
-  // CFX_DIBSource
+  // CFX_DIBBase
   uint8_t* GetBuffer() const override;
   const uint8_t* GetScanline(int line) const override;
   void DownSampleScanline(int line,
@@ -47,18 +47,18 @@
   void SetPixel(int x, int y, uint32_t color);
 
   bool LoadChannel(FXDIB_Channel destChannel,
-                   const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                   const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                    FXDIB_Channel srcChannel);
   bool LoadChannel(FXDIB_Channel destChannel, int value);
 
   bool MultiplyAlpha(int alpha);
-  bool MultiplyAlpha(const RetainPtr<CFX_DIBSource>& pAlphaMask);
+  bool MultiplyAlpha(const RetainPtr<CFX_DIBBase>& pAlphaMask);
 
   bool TransferBitmap(int dest_left,
                       int dest_top,
                       int width,
                       int height,
-                      const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                      const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                       int src_left,
                       int src_top);
 
@@ -66,7 +66,7 @@
                        int dest_top,
                        int width,
                        int height,
-                       const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                       const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                        int src_left,
                        int src_top,
                        int blend_type,
@@ -77,7 +77,7 @@
                      int dest_top,
                      int width,
                      int height,
-                     const RetainPtr<CFX_DIBSource>& pMask,
+                     const RetainPtr<CFX_DIBBase>& pMask,
                      uint32_t color,
                      int src_left,
                      int src_top,
@@ -130,21 +130,21 @@
                                   int dest_top,
                                   int width,
                                   int height,
-                                  const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                  const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                   int src_left,
                                   int src_top);
   void TransferWithMultipleBPP(int dest_left,
                                int dest_top,
                                int width,
                                int height,
-                               const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                               const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                int src_left,
                                int src_top);
   void TransferEqualFormatsOneBPP(int dest_left,
                                   int dest_top,
                                   int width,
                                   int height,
-                                  const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                  const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                   int src_left,
                                   int src_top);
 };
diff --git a/core/fxge/dib/cfx_filtereddib.cpp b/core/fxge/dib/cfx_filtereddib.cpp
index 1d5ed62..297a099 100644
--- a/core/fxge/dib/cfx_filtereddib.cpp
+++ b/core/fxge/dib/cfx_filtereddib.cpp
@@ -12,7 +12,7 @@
 
 CFX_FilteredDIB::~CFX_FilteredDIB() {}
 
-void CFX_FilteredDIB::LoadSrc(const RetainPtr<CFX_DIBSource>& pSrc) {
+void CFX_FilteredDIB::LoadSrc(const RetainPtr<CFX_DIBBase>& pSrc) {
   m_pSrc = pSrc;
   m_Width = pSrc->GetWidth();
   m_Height = pSrc->GetHeight();
diff --git a/core/fxge/dib/cfx_filtereddib.h b/core/fxge/dib/cfx_filtereddib.h
index 9c1efa5..ec32a78 100644
--- a/core/fxge/dib/cfx_filtereddib.h
+++ b/core/fxge/dib/cfx_filtereddib.h
@@ -10,9 +10,9 @@
 #include <vector>
 
 #include "core/fxcrt/retain_ptr.h"
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 
-class CFX_FilteredDIB : public CFX_DIBSource {
+class CFX_FilteredDIB : public CFX_DIBBase {
  public:
   template <typename T, typename... Args>
   friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
@@ -26,13 +26,13 @@
                                     int pixels,
                                     int Bpp) const = 0;
 
-  void LoadSrc(const RetainPtr<CFX_DIBSource>& pSrc);
+  void LoadSrc(const RetainPtr<CFX_DIBBase>& pSrc);
 
  protected:
   CFX_FilteredDIB();
   ~CFX_FilteredDIB() override;
 
-  // CFX_DIBSource
+  // CFX_DIBBase
   const uint8_t* GetScanline(int line) const override;
   void DownSampleScanline(int line,
                           uint8_t* dest_scan,
@@ -42,7 +42,7 @@
                           int clip_left,
                           int clip_width) const override;
 
-  RetainPtr<CFX_DIBSource> m_pSrc;
+  RetainPtr<CFX_DIBBase> m_pSrc;
   mutable std::vector<uint8_t> m_Scanline;
 };
 
diff --git a/core/fxge/dib/cfx_imagerenderer.cpp b/core/fxge/dib/cfx_imagerenderer.cpp
index a196068..64c484f 100644
--- a/core/fxge/dib/cfx_imagerenderer.cpp
+++ b/core/fxge/dib/cfx_imagerenderer.cpp
@@ -15,7 +15,7 @@
 
 CFX_ImageRenderer::CFX_ImageRenderer(const RetainPtr<CFX_DIBitmap>& pDevice,
                                      const CFX_ClipRgn* pClipRgn,
-                                     const RetainPtr<CFX_DIBSource>& pSource,
+                                     const RetainPtr<CFX_DIBBase>& pSource,
                                      int bitmap_alpha,
                                      uint32_t mask_color,
                                      const CFX_Matrix* pMatrix,
diff --git a/core/fxge/dib/cfx_imagerenderer.h b/core/fxge/dib/cfx_imagerenderer.h
index 14eaf56..905ff8c 100644
--- a/core/fxge/dib/cfx_imagerenderer.h
+++ b/core/fxge/dib/cfx_imagerenderer.h
@@ -13,8 +13,8 @@
 #include "core/fxcrt/retain_ptr.h"
 #include "core/fxcrt/unowned_ptr.h"
 #include "core/fxge/dib/cfx_bitmapcomposer.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "core/fxge/dib/cfx_dibitmap.h"
-#include "core/fxge/dib/cfx_dibsource.h"
 #include "core/fxge/fx_dib.h"
 #include "third_party/base/stl_util.h"
 
@@ -25,7 +25,7 @@
  public:
   CFX_ImageRenderer(const RetainPtr<CFX_DIBitmap>& pDevice,
                     const CFX_ClipRgn* pClipRgn,
-                    const RetainPtr<CFX_DIBSource>& pSource,
+                    const RetainPtr<CFX_DIBBase>& pSource,
                     int bitmap_alpha,
                     uint32_t mask_color,
                     const CFX_Matrix* pMatrix,
diff --git a/core/fxge/dib/cfx_imagestretcher.cpp b/core/fxge/dib/cfx_imagestretcher.cpp
index 1c54e3f..809d3b1 100644
--- a/core/fxge/dib/cfx_imagestretcher.cpp
+++ b/core/fxge/dib/cfx_imagestretcher.cpp
@@ -9,8 +9,8 @@
 #include <climits>
 #include <tuple>
 
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "core/fxge/dib/cfx_dibitmap.h"
-#include "core/fxge/dib/cfx_dibsource.h"
 #include "core/fxge/dib/cstretchengine.h"
 #include "core/fxge/fx_dib.h"
 #include "third_party/base/ptr_util.h"
@@ -23,7 +23,7 @@
   return !height || width < kMaxProgressiveStretchPixels / height;
 }
 
-FXDIB_Format GetStretchedFormat(const CFX_DIBSource& src) {
+FXDIB_Format GetStretchedFormat(const CFX_DIBBase& src) {
   FXDIB_Format format = src.GetFormat();
   if (format == FXDIB_1bppMask)
     return FXDIB_8bppMask;
@@ -43,7 +43,7 @@
 }  // namespace
 
 CFX_ImageStretcher::CFX_ImageStretcher(ScanlineComposerIface* pDest,
-                                       const RetainPtr<CFX_DIBSource>& pSource,
+                                       const RetainPtr<CFX_DIBBase>& pSource,
                                        int dest_width,
                                        int dest_height,
                                        const FX_RECT& bitmap_rect,
diff --git a/core/fxge/dib/cfx_imagestretcher.h b/core/fxge/dib/cfx_imagestretcher.h
index 1133725..8e86662 100644
--- a/core/fxge/dib/cfx_imagestretcher.h
+++ b/core/fxge/dib/cfx_imagestretcher.h
@@ -16,13 +16,13 @@
 #include "core/fxge/dib/scanlinecomposer_iface.h"
 #include "core/fxge/fx_dib.h"
 
-class CFX_DIBSource;
+class CFX_DIBBase;
 class PauseIndicatorIface;
 
 class CFX_ImageStretcher {
  public:
   CFX_ImageStretcher(ScanlineComposerIface* pDest,
-                     const RetainPtr<CFX_DIBSource>& pSource,
+                     const RetainPtr<CFX_DIBBase>& pSource,
                      int dest_width,
                      int dest_height,
                      const FX_RECT& bitmap_rect,
@@ -32,7 +32,7 @@
   bool Start();
   bool Continue(PauseIndicatorIface* pPause);
 
-  RetainPtr<CFX_DIBSource> source() { return m_pSource; }
+  RetainPtr<CFX_DIBBase> source() { return m_pSource; }
 
  private:
   bool StartQuickStretch();
@@ -41,7 +41,7 @@
   bool ContinueStretch(PauseIndicatorIface* pPause);
 
   UnownedPtr<ScanlineComposerIface> const m_pDest;
-  RetainPtr<CFX_DIBSource> m_pSource;
+  RetainPtr<CFX_DIBBase> m_pSource;
   std::unique_ptr<CStretchEngine> m_pStretchEngine;
   std::unique_ptr<uint8_t, FxFreeDeleter> m_pScanline;
   std::unique_ptr<uint8_t, FxFreeDeleter> m_pMaskScanline;
diff --git a/core/fxge/dib/cfx_imagetransformer.cpp b/core/fxge/dib/cfx_imagetransformer.cpp
index c41ac2b..0042462 100644
--- a/core/fxge/dib/cfx_imagetransformer.cpp
+++ b/core/fxge/dib/cfx_imagetransformer.cpp
@@ -99,7 +99,7 @@
   v_w[3] = SDP_Table[512 - res_y];
 }
 
-FXDIB_Format GetTransformedFormat(const RetainPtr<CFX_DIBSource>& pDrc) {
+FXDIB_Format GetTransformedFormat(const RetainPtr<CFX_DIBBase>& pDrc) {
   if (pDrc->IsAlphaMask())
     return FXDIB_8bppMask;
 
@@ -200,7 +200,7 @@
 
 }  // namespace
 
-CFX_ImageTransformer::CFX_ImageTransformer(const RetainPtr<CFX_DIBSource>& pSrc,
+CFX_ImageTransformer::CFX_ImageTransformer(const RetainPtr<CFX_DIBBase>& pSrc,
                                            const CFX_Matrix* pMatrix,
                                            int flags,
                                            const FX_RECT* pClip)
diff --git a/core/fxge/dib/cfx_imagetransformer.h b/core/fxge/dib/cfx_imagetransformer.h
index a5b8841..61fe1e1 100644
--- a/core/fxge/dib/cfx_imagetransformer.h
+++ b/core/fxge/dib/cfx_imagetransformer.h
@@ -13,14 +13,14 @@
 #include "core/fxcrt/retain_ptr.h"
 #include "core/fxcrt/unowned_ptr.h"
 #include "core/fxge/dib/cfx_bitmapstorer.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "core/fxge/dib/cfx_dibitmap.h"
-#include "core/fxge/dib/cfx_dibsource.h"
 
 class CFX_ImageStretcher;
 
 class CFX_ImageTransformer {
  public:
-  CFX_ImageTransformer(const RetainPtr<CFX_DIBSource>& pSrc,
+  CFX_ImageTransformer(const RetainPtr<CFX_DIBBase>& pSrc,
                        const CFX_Matrix* pMatrix,
                        int flags,
                        const FX_RECT* pClip);
@@ -98,7 +98,7 @@
       int increment,
       std::function<void(const DownSampleData&, uint8_t*)> func);
 
-  const RetainPtr<CFX_DIBSource> m_pSrc;
+  const RetainPtr<CFX_DIBBase> m_pSrc;
   UnownedPtr<const CFX_Matrix> const m_pMatrix;
   const FX_RECT* const m_pClip;
   FX_RECT m_StretchClip;
diff --git a/core/fxge/dib/cfx_scanlinecompositor.h b/core/fxge/dib/cfx_scanlinecompositor.h
index 75ab578..1c373f0 100644
--- a/core/fxge/dib/cfx_scanlinecompositor.h
+++ b/core/fxge/dib/cfx_scanlinecompositor.h
@@ -9,7 +9,7 @@
 
 #include <memory>
 
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 
 class CFX_ScanlineCompositor {
  public:
diff --git a/core/fxge/dib/cstretchengine.cpp b/core/fxge/dib/cstretchengine.cpp
index ad9a356..41a843d 100644
--- a/core/fxge/dib/cstretchengine.cpp
+++ b/core/fxge/dib/cstretchengine.cpp
@@ -10,8 +10,8 @@
 #include <utility>
 
 #include "core/fxcrt/pauseindicator_iface.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "core/fxge/dib/cfx_dibitmap.h"
-#include "core/fxge/dib/cfx_dibsource.h"
 #include "core/fxge/dib/scanlinecomposer_iface.h"
 #include "core/fxge/fx_dib.h"
 
@@ -227,7 +227,7 @@
                                int dest_width,
                                int dest_height,
                                const FX_RECT& clip_rect,
-                               const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                               const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                int flags)
     : m_DestFormat(dest_format),
       m_DestBpp(GetBppFromFormat(dest_format)),
diff --git a/core/fxge/dib/cstretchengine.h b/core/fxge/dib/cstretchengine.h
index c9f11d6..db7a2be 100644
--- a/core/fxge/dib/cstretchengine.h
+++ b/core/fxge/dib/cstretchengine.h
@@ -24,7 +24,7 @@
                  int dest_width,
                  int dest_height,
                  const FX_RECT& clip_rect,
-                 const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                 const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                  int flags);
   ~CStretchEngine();
 
@@ -80,7 +80,7 @@
   const int m_DestBpp;
   const int m_SrcBpp;
   const int m_bHasAlpha;
-  RetainPtr<CFX_DIBSource> const m_pSource;
+  RetainPtr<CFX_DIBBase> const m_pSource;
   const uint32_t* m_pSrcPalette;
   const int m_SrcWidth;
   const int m_SrcHeight;
diff --git a/core/fxge/dib/cstretchengine_unittest.cpp b/core/fxge/dib/cstretchengine_unittest.cpp
index 2c7e034..8169cae 100644
--- a/core/fxge/dib/cstretchengine_unittest.cpp
+++ b/core/fxge/dib/cstretchengine_unittest.cpp
@@ -10,7 +10,7 @@
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
 #include "core/fpdfapi/parser/cpdf_number.h"
 #include "core/fpdfapi/parser/cpdf_stream.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "core/fxcrt/fx_memory.h"
 #include "core/fxge/fx_dib.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -24,7 +24,7 @@
   dict_obj->SetNewFor<CPDF_Number>("Height", 12500);
   std::unique_ptr<CPDF_Stream> stream =
       pdfium::MakeUnique<CPDF_Stream>(nullptr, 0, std::move(dict_obj));
-  auto dib_source = pdfium::MakeRetain<CPDF_DIBSource>();
+  auto dib_source = pdfium::MakeRetain<CPDF_DIBBase>();
   dib_source->Load(nullptr, stream.get());
   CStretchEngine engine(nullptr, FXDIB_8bppRgb, 500, 500, clip_rect, dib_source,
                         0);
diff --git a/core/fxge/fx_dib.h b/core/fxge/fx_dib.h
index 3475e5c..7d8ca5f 100644
--- a/core/fxge/fx_dib.h
+++ b/core/fxge/fx_dib.h
@@ -45,7 +45,7 @@
 using FX_CMYK = uint32_t;
 
 class CFX_ClipRgn;
-class CFX_DIBSource;
+class CFX_DIBBase;
 class CStretchEngine;
 
 extern const int16_t SDP_Table[513];
diff --git a/core/fxge/renderdevicedriver_iface.cpp b/core/fxge/renderdevicedriver_iface.cpp
index 7023e02..646851f 100644
--- a/core/fxge/renderdevicedriver_iface.cpp
+++ b/core/fxge/renderdevicedriver_iface.cpp
@@ -81,8 +81,8 @@
 }
 
 bool RenderDeviceDriverIface::SetBitsWithMask(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
-    const RetainPtr<CFX_DIBSource>& pMask,
+    const RetainPtr<CFX_DIBBase>& pBitmap,
+    const RetainPtr<CFX_DIBBase>& pMask,
     int left,
     int top,
     int bitmap_alpha,
diff --git a/core/fxge/renderdevicedriver_iface.h b/core/fxge/renderdevicedriver_iface.h
index a0c148d..62287ab 100644
--- a/core/fxge/renderdevicedriver_iface.h
+++ b/core/fxge/renderdevicedriver_iface.h
@@ -14,7 +14,7 @@
 #include "core/fxcrt/retain_ptr.h"
 
 class CFX_DIBitmap;
-class CFX_DIBSource;
+class CFX_DIBBase;
 class CFX_Font;
 class CFX_GraphStateData;
 class CFX_ImageRenderer;
@@ -63,13 +63,13 @@
                          int left,
                          int top);
   virtual RetainPtr<CFX_DIBitmap> GetBackDrop();
-  virtual bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  virtual bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                          uint32_t color,
                          const FX_RECT* pSrcRect,
                          int dest_left,
                          int dest_top,
                          int blend_type) = 0;
-  virtual bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  virtual bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                              uint32_t color,
                              int dest_left,
                              int dest_top,
@@ -78,7 +78,7 @@
                              const FX_RECT* pClipRect,
                              uint32_t flags,
                              int blend_type) = 0;
-  virtual bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  virtual bool StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                            int bitmap_alpha,
                            uint32_t color,
                            const CFX_Matrix* pMatrix,
@@ -100,8 +100,8 @@
                            const FX_RECT& clip_rect,
                            int alpha,
                            bool bAlphaMode);
-  virtual bool SetBitsWithMask(const RetainPtr<CFX_DIBSource>& pBitmap,
-                               const RetainPtr<CFX_DIBSource>& pMask,
+  virtual bool SetBitsWithMask(const RetainPtr<CFX_DIBBase>& pBitmap,
+                               const RetainPtr<CFX_DIBBase>& pMask,
                                int left,
                                int top,
                                int bitmap_alpha,
diff --git a/core/fxge/skia/fx_skia_device.cpp b/core/fxge/skia/fx_skia_device.cpp
index 0b96cdc..db18100 100644
--- a/core/fxge/skia/fx_skia_device.cpp
+++ b/core/fxge/skia/fx_skia_device.cpp
@@ -60,7 +60,7 @@
                                 int dest_top,
                                 int width,
                                 int height,
-                                const RetainPtr<CFX_DIBSource>& pSrcBitmap,
+                                const RetainPtr<CFX_DIBBase>& pSrcBitmap,
                                 int src_left,
                                 int src_top) {
   if (!pBitmap)
@@ -566,7 +566,7 @@
   paint->setAlpha(bitmap_alpha);
 }
 
-bool Upsample(const RetainPtr<CFX_DIBSource>& pSource,
+bool Upsample(const RetainPtr<CFX_DIBBase>& pSource,
               std::unique_ptr<uint8_t, FxFreeDeleter>& dst8Storage,
               std::unique_ptr<uint32_t, FxFreeDeleter>& dst32Storage,
               SkBitmap* skBitmap,
@@ -2256,7 +2256,7 @@
   return m_pBackdropBitmap;
 }
 
-bool CFX_SkiaDeviceDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CFX_SkiaDeviceDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                      uint32_t argb,
                                      const FX_RECT* pSrcRect,
                                      int left,
@@ -2286,16 +2286,15 @@
 #endif  // _SKIA_SUPPORT_PATHS_
 }
 
-bool CFX_SkiaDeviceDriver::StretchDIBits(
-    const RetainPtr<CFX_DIBSource>& pSource,
-    uint32_t argb,
-    int dest_left,
-    int dest_top,
-    int dest_width,
-    int dest_height,
-    const FX_RECT* pClipRect,
-    uint32_t flags,
-    int blend_type) {
+bool CFX_SkiaDeviceDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource,
+                                         uint32_t argb,
+                                         int dest_left,
+                                         int dest_top,
+                                         int dest_width,
+                                         int dest_height,
+                                         const FX_RECT* pClipRect,
+                                         uint32_t flags,
+                                         int blend_type) {
 #ifdef _SKIA_SUPPORT_
   m_pCache->FlushForDraw();
   if (!m_pBitmap->GetBuffer())
@@ -2339,7 +2338,7 @@
 }
 
 bool CFX_SkiaDeviceDriver::StartDIBits(
-    const RetainPtr<CFX_DIBSource>& pSource,
+    const RetainPtr<CFX_DIBBase>& pSource,
     int bitmap_alpha,
     uint32_t argb,
     const CFX_Matrix* pMatrix,
@@ -2472,8 +2471,8 @@
 
 #ifdef _SKIA_SUPPORT_
 bool CFX_SkiaDeviceDriver::DrawBitsWithMask(
-    const RetainPtr<CFX_DIBSource>& pSource,
-    const RetainPtr<CFX_DIBSource>& pMask,
+    const RetainPtr<CFX_DIBBase>& pSource,
+    const RetainPtr<CFX_DIBBase>& pMask,
     int bitmap_alpha,
     const CFX_Matrix* pMatrix,
     int blend_type) {
@@ -2513,8 +2512,8 @@
 }
 
 bool CFX_SkiaDeviceDriver::SetBitsWithMask(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
-    const RetainPtr<CFX_DIBSource>& pMask,
+    const RetainPtr<CFX_DIBBase>& pBitmap,
+    const RetainPtr<CFX_DIBBase>& pMask,
     int dest_left,
     int dest_top,
     int bitmap_alpha,
@@ -2614,8 +2613,8 @@
 }
 
 bool CFX_DefaultRenderDevice::SetBitsWithMask(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
-    const RetainPtr<CFX_DIBSource>& pMask,
+    const RetainPtr<CFX_DIBBase>& pBitmap,
+    const RetainPtr<CFX_DIBBase>& pMask,
     int left,
     int top,
     int bitmap_alpha,
@@ -2629,7 +2628,7 @@
 }
 #endif  // _SKIA_SUPPORT_
 
-void CFX_DIBSource::DebugVerifyBitmapIsPreMultiplied(void* opt) const {
+void CFX_DIBBase::DebugVerifyBitmapIsPreMultiplied(void* opt) const {
 #ifdef SK_DEBUG
   SkASSERT(32 == GetBPP());
   const uint32_t* buffer = (const uint32_t*)(opt ? opt : GetBuffer());
diff --git a/core/fxge/skia/fx_skia_device.h b/core/fxge/skia/fx_skia_device.h
index 692199f..ce6ca6b 100644
--- a/core/fxge/skia/fx_skia_device.h
+++ b/core/fxge/skia/fx_skia_device.h
@@ -83,15 +83,15 @@
 
   RetainPtr<CFX_DIBitmap> GetBackDrop() override;
 
-  bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
                  const FX_RECT* pSrcRect,
                  int dest_left,
                  int dest_top,
                  int blend_type) override;
 #ifdef _SKIA_SUPPORT_
-  bool SetBitsWithMask(const RetainPtr<CFX_DIBSource>& pBitmap,
-                       const RetainPtr<CFX_DIBSource>& pMask,
+  bool SetBitsWithMask(const RetainPtr<CFX_DIBBase>& pBitmap,
+                       const RetainPtr<CFX_DIBBase>& pMask,
                        int dest_left,
                        int dest_top,
                        int bitmap_alpha,
@@ -102,7 +102,7 @@
   void SetClipMask(const FX_RECT& clipBox, const SkPath& skClipPath);
 #endif
 
-  bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                      uint32_t color,
                      int dest_left,
                      int dest_top,
@@ -112,7 +112,7 @@
                      uint32_t flags,
                      int blend_type) override;
 
-  bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                    int bitmap_alpha,
                    uint32_t color,
                    const CFX_Matrix* pMatrix,
@@ -123,8 +123,8 @@
   bool ContinueDIBits(CFX_ImageRenderer* handle,
                       PauseIndicatorIface* pPause) override;
 
-  bool DrawBitsWithMask(const RetainPtr<CFX_DIBSource>& pBitmap,
-                        const RetainPtr<CFX_DIBSource>& pMask,
+  bool DrawBitsWithMask(const RetainPtr<CFX_DIBBase>& pBitmap,
+                        const RetainPtr<CFX_DIBBase>& pMask,
                         int bitmap_alpha,
                         const CFX_Matrix* pMatrix,
                         int blend_type);
diff --git a/core/fxge/win32/cfx_psrenderer.cpp b/core/fxge/win32/cfx_psrenderer.cpp
index 036cb43..f5970a3 100644
--- a/core/fxge/win32/cfx_psrenderer.cpp
+++ b/core/fxge/win32/cfx_psrenderer.cpp
@@ -337,7 +337,7 @@
   WriteToStream(&buf);
 }
 
-bool CFX_PSRenderer::SetDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CFX_PSRenderer::SetDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                uint32_t color,
                                int left,
                                int top) {
@@ -348,7 +348,7 @@
   return DrawDIBits(pSource, color, &matrix, 0);
 }
 
-bool CFX_PSRenderer::StretchDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CFX_PSRenderer::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                    uint32_t color,
                                    int dest_left,
                                    int dest_top,
@@ -361,7 +361,7 @@
   return DrawDIBits(pSource, color, &matrix, flags);
 }
 
-bool CFX_PSRenderer::DrawDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CFX_PSRenderer::DrawDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                 uint32_t color,
                                 const CFX_Matrix* pMatrix,
                                 uint32_t flags) {
@@ -423,7 +423,7 @@
     output_buf.release();
   } else {
     CFX_DIBExtractor source_extractor(pSource);
-    RetainPtr<CFX_DIBSource> pConverted = source_extractor.GetBitmap();
+    RetainPtr<CFX_DIBBase> pConverted = source_extractor.GetBitmap();
     if (!pConverted)
       return false;
     switch (pSource->GetFormat()) {
diff --git a/core/fxge/win32/cfx_psrenderer.h b/core/fxge/win32/cfx_psrenderer.h
index 4116dd4..e54c2f8 100644
--- a/core/fxge/win32/cfx_psrenderer.h
+++ b/core/fxge/win32/cfx_psrenderer.h
@@ -16,7 +16,7 @@
 #include "core/fxcrt/retain_ptr.h"
 #include "core/fxge/cfx_graphstatedata.h"
 
-class CFX_DIBSource;
+class CFX_DIBBase;
 class CFX_FaceCache;
 class CFX_Font;
 class CFX_FontCache;
@@ -52,18 +52,18 @@
                 uint32_t fill_color,
                 uint32_t stroke_color,
                 int fill_mode);
-  bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
                  int dest_left,
                  int dest_top);
-  bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                      uint32_t color,
                      int dest_left,
                      int dest_top,
                      int dest_width,
                      int dest_height,
                      uint32_t flags);
-  bool DrawDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool DrawDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                   uint32_t color,
                   const CFX_Matrix* pMatrix,
                   uint32_t flags);
diff --git a/core/fxge/win32/fx_win32_device.cpp b/core/fxge/win32/fx_win32_device.cpp
index ed03101..c8f0497 100644
--- a/core/fxge/win32/fx_win32_device.cpp
+++ b/core/fxge/win32/fx_win32_device.cpp
@@ -1187,7 +1187,7 @@
   return ret;
 }
 
-bool CGdiDisplayDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CGdiDisplayDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                   uint32_t color,
                                   const FX_RECT* pSrcRect,
                                   int left,
@@ -1235,7 +1235,7 @@
 }
 
 bool CGdiDisplayDriver::UseFoxitStretchEngine(
-    const RetainPtr<CFX_DIBSource>& pSource,
+    const RetainPtr<CFX_DIBBase>& pSource,
     uint32_t color,
     int dest_left,
     int dest_top,
@@ -1261,7 +1261,7 @@
                    pClipRect->top, FXDIB_BLEND_NORMAL);
 }
 
-bool CGdiDisplayDriver::StretchDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CGdiDisplayDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                       uint32_t color,
                                       int dest_left,
                                       int dest_top,
@@ -1328,7 +1328,7 @@
                            dest_height, flags);
 }
 
-bool CGdiDisplayDriver::StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CGdiDisplayDriver::StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                     int bitmap_alpha,
                                     uint32_t color,
                                     const CFX_Matrix* pMatrix,
diff --git a/core/fxge/win32/fx_win32_print.cpp b/core/fxge/win32/fx_win32_print.cpp
index 1e2b2d4..83a1627 100644
--- a/core/fxge/win32/fx_win32_print.cpp
+++ b/core/fxge/win32/fx_win32_print.cpp
@@ -69,7 +69,7 @@
   return CGdiDeviceDriver::GetDeviceCaps(caps_id);
 }
 
-bool CGdiPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CGdiPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                   uint32_t color,
                                   const FX_RECT* pSrcRect,
                                   int left,
@@ -96,7 +96,7 @@
   return GDI_SetDIBits(pBitmap, pSrcRect, left, top);
 }
 
-bool CGdiPrinterDriver::StretchDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CGdiPrinterDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                       uint32_t color,
                                       int dest_left,
                                       int dest_top,
@@ -159,7 +159,7 @@
                            dest_height, flags);
 }
 
-bool CGdiPrinterDriver::StartDIBits(const RetainPtr<CFX_DIBSource>& pSource,
+bool CGdiPrinterDriver::StartDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                     int bitmap_alpha,
                                     uint32_t color,
                                     const CFX_Matrix* pMatrix,
@@ -454,7 +454,7 @@
   return true;
 }
 
-bool CPSPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CPSPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                  uint32_t color,
                                  const FX_RECT* pSrcRect,
                                  int left,
@@ -465,7 +465,7 @@
   return m_PSRenderer.SetDIBits(pBitmap, color, left, top);
 }
 
-bool CPSPrinterDriver::StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CPSPrinterDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                      uint32_t color,
                                      int dest_left,
                                      int dest_top,
@@ -480,7 +480,7 @@
                                     dest_width, dest_height, flags);
 }
 
-bool CPSPrinterDriver::StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CPSPrinterDriver::StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                    int bitmap_alpha,
                                    uint32_t color,
                                    const CFX_Matrix* pMatrix,
@@ -565,7 +565,7 @@
   return false;
 }
 
-bool CTextOnlyPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+bool CTextOnlyPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                        uint32_t color,
                                        const FX_RECT* pSrcRect,
                                        int left,
@@ -583,7 +583,7 @@
 }
 
 bool CTextOnlyPrinterDriver::StretchDIBits(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
+    const RetainPtr<CFX_DIBBase>& pBitmap,
     uint32_t color,
     int dest_left,
     int dest_top,
@@ -596,7 +596,7 @@
 }
 
 bool CTextOnlyPrinterDriver::StartDIBits(
-    const RetainPtr<CFX_DIBSource>& pBitmap,
+    const RetainPtr<CFX_DIBBase>& pBitmap,
     int bitmap_alpha,
     uint32_t color,
     const CFX_Matrix* pMatrix,
diff --git a/core/fxge/win32/win32_int.h b/core/fxge/win32/win32_int.h
index fe0e7f3..76a1d88 100644
--- a/core/fxge/win32/win32_int.h
+++ b/core/fxge/win32/win32_int.h
@@ -197,13 +197,13 @@
   bool GetDIBits(const RetainPtr<CFX_DIBitmap>& pBitmap,
                  int left,
                  int top) override;
-  bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
                  const FX_RECT* pSrcRect,
                  int left,
                  int top,
                  int blend_type) override;
-  bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                      uint32_t color,
                      int dest_left,
                      int dest_top,
@@ -212,14 +212,14 @@
                      const FX_RECT* pClipRect,
                      uint32_t flags,
                      int blend_type) override;
-  bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                    int bitmap_alpha,
                    uint32_t color,
                    const CFX_Matrix* pMatrix,
                    uint32_t render_flags,
                    std::unique_ptr<CFX_ImageRenderer>* handle,
                    int blend_type) override;
-  bool UseFoxitStretchEngine(const RetainPtr<CFX_DIBSource>& pSource,
+  bool UseFoxitStretchEngine(const RetainPtr<CFX_DIBBase>& pSource,
                              uint32_t color,
                              int dest_left,
                              int dest_top,
@@ -236,13 +236,13 @@
 
  protected:
   int GetDeviceCaps(int caps_id) const override;
-  bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
                  const FX_RECT* pSrcRect,
                  int left,
                  int top,
                  int blend_type) override;
-  bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                      uint32_t color,
                      int dest_left,
                      int dest_top,
@@ -251,7 +251,7 @@
                      const FX_RECT* pClipRect,
                      uint32_t flags,
                      int blend_type) override;
-  bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                    int bitmap_alpha,
                    uint32_t color,
                    const CFX_Matrix* pMatrix,
@@ -295,13 +295,13 @@
                 int fill_mode,
                 int blend_type) override;
   bool GetClipBox(FX_RECT* pRect) override;
-  bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
                  const FX_RECT* pSrcRect,
                  int left,
                  int top,
                  int blend_type) override;
-  bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                      uint32_t color,
                      int dest_left,
                      int dest_top,
@@ -310,7 +310,7 @@
                      const FX_RECT* pClipRect,
                      uint32_t flags,
                      int blend_type) override;
-  bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                    int bitmap_alpha,
                    uint32_t color,
                    const CFX_Matrix* pMatrix,
@@ -358,13 +358,13 @@
                 int fill_mode,
                 int blend_type) override;
   bool GetClipBox(FX_RECT* pRect) override;
-  bool SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
                  const FX_RECT* pSrcRect,
                  int left,
                  int top,
                  int blend_type) override;
-  bool StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StretchDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                      uint32_t color,
                      int dest_left,
                      int dest_top,
@@ -373,7 +373,7 @@
                      const FX_RECT* pClipRect,
                      uint32_t flags,
                      int blend_type) override;
-  bool StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
+  bool StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                    int bitmap_alpha,
                    uint32_t color,
                    const CFX_Matrix* pMatrix,
diff --git a/fpdfsdk/fpdf_editimg.cpp b/fpdfsdk/fpdf_editimg.cpp
index 8235a8c..3709da7 100644
--- a/fpdfsdk/fpdf_editimg.cpp
+++ b/fpdfsdk/fpdf_editimg.cpp
@@ -14,7 +14,7 @@
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_name.h"
 #include "core/fpdfapi/parser/cpdf_stream_acc.h"
-#include "core/fpdfapi/render/cpdf_dibsource.h"
+#include "core/fpdfapi/render/cpdf_dibbase.h"
 #include "fpdfsdk/cpdfsdk_customaccess.h"
 #include "fpdfsdk/cpdfsdk_helpers.h"
 #include "third_party/base/ptr_util.h"
@@ -170,7 +170,7 @@
   if (!pImg)
     return nullptr;
 
-  RetainPtr<CFX_DIBSource> pSource = pImg->LoadDIBSource();
+  RetainPtr<CFX_DIBBase> pSource = pImg->LoadDIBBase();
   if (!pSource)
     return nullptr;
 
@@ -313,11 +313,11 @@
   if (!pPage || !pPage->GetDocument() || !pImg->GetStream())
     return true;
 
-  auto pSource = pdfium::MakeRetain<CPDF_DIBSource>();
-  CPDF_DIBSource::LoadState ret = pSource->StartLoadDIBSource(
+  auto pSource = pdfium::MakeRetain<CPDF_DIBBase>();
+  CPDF_DIBBase::LoadState ret = pSource->StartLoadDIBBase(
       pPage->GetDocument(), pImg->GetStream(), false, nullptr,
       pPage->m_pPageResources.Get(), false, 0, false);
-  if (ret == CPDF_DIBSource::LoadState::kFail)
+  if (ret == CPDF_DIBBase::LoadState::kFail)
     return true;
 
   metadata->bits_per_pixel = pSource->GetBPP();
diff --git a/xfa/fxfa/cxfa_ffdoc.h b/xfa/fxfa/cxfa_ffdoc.h
index 88becb4..50888b8 100644
--- a/xfa/fxfa/cxfa_ffdoc.h
+++ b/xfa/fxfa/cxfa_ffdoc.h
@@ -29,12 +29,12 @@
 struct FX_IMAGEDIB_AND_DPI {
   FX_IMAGEDIB_AND_DPI();
   FX_IMAGEDIB_AND_DPI(const FX_IMAGEDIB_AND_DPI& that);
-  FX_IMAGEDIB_AND_DPI(const RetainPtr<CFX_DIBSource>& pDib,
+  FX_IMAGEDIB_AND_DPI(const RetainPtr<CFX_DIBBase>& pDib,
                       int32_t xDpi,
                       int32_t yDpi);
   ~FX_IMAGEDIB_AND_DPI();
 
-  RetainPtr<CFX_DIBSource> pDibSource;
+  RetainPtr<CFX_DIBBase> pDibSource;
   int32_t iImageXDpi;
   int32_t iImageYDpi;
 };
@@ -44,7 +44,7 @@
     const FX_IMAGEDIB_AND_DPI& that) = default;
 
 inline FX_IMAGEDIB_AND_DPI::FX_IMAGEDIB_AND_DPI(
-    const RetainPtr<CFX_DIBSource>& pDib,
+    const RetainPtr<CFX_DIBBase>& pDib,
     int32_t xDpi,
     int32_t yDpi)
     : pDibSource(pDib), iImageXDpi(xDpi), iImageYDpi(yDpi) {}
diff --git a/xfa/fxfa/cxfa_imagerenderer.cpp b/xfa/fxfa/cxfa_imagerenderer.cpp
index f90ea64..9f65eaa 100644
--- a/xfa/fxfa/cxfa_imagerenderer.cpp
+++ b/xfa/fxfa/cxfa_imagerenderer.cpp
@@ -7,23 +7,20 @@
 #include "xfa/fxfa/cxfa_imagerenderer.h"
 
 #include "core/fxge/cfx_renderdevice.h"
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "core/fxge/dib/cfx_imagerenderer.h"
 #include "core/fxge/dib/cfx_imagetransformer.h"
 #include "third_party/base/ptr_util.h"
 
-CXFA_ImageRenderer::CXFA_ImageRenderer(
-    CFX_RenderDevice* pDevice,
-    const RetainPtr<CFX_DIBSource>& pDIBSource,
-    const CFX_Matrix* pImage2Device)
-    : m_pDevice(pDevice),
-      m_ImageMatrix(*pImage2Device),
-      m_pDIBSource(pDIBSource) {}
+CXFA_ImageRenderer::CXFA_ImageRenderer(CFX_RenderDevice* pDevice,
+                                       const RetainPtr<CFX_DIBBase>& pDIBBase,
+                                       const CFX_Matrix* pImage2Device)
+    : m_pDevice(pDevice), m_ImageMatrix(*pImage2Device), m_pDIBBase(pDIBBase) {}
 
 CXFA_ImageRenderer::~CXFA_ImageRenderer() {}
 
 bool CXFA_ImageRenderer::Start() {
-  if (m_pDevice->StartDIBitsWithBlend(m_pDIBSource, 255, 0, &m_ImageMatrix,
+  if (m_pDevice->StartDIBitsWithBlend(m_pDIBBase, 255, 0, &m_ImageMatrix,
                                       FXDIB_INTERPOL, &m_DeviceHandle,
                                       FXDIB_BLEND_NORMAL)) {
     if (m_DeviceHandle) {
@@ -38,11 +35,11 @@
   int dest_height = image_rect.Height();
   if ((fabs(m_ImageMatrix.b) >= 0.5f || m_ImageMatrix.a == 0) ||
       (fabs(m_ImageMatrix.c) >= 0.5f || m_ImageMatrix.d == 0)) {
-    RetainPtr<CFX_DIBSource> pDib = m_pDIBSource;
-    if (m_pDIBSource->HasAlpha() &&
+    RetainPtr<CFX_DIBBase> pDib = m_pDIBBase;
+    if (m_pDIBBase->HasAlpha() &&
         !(m_pDevice->GetRenderCaps() & FXRC_ALPHA_IMAGE) &&
         !(m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
-      m_pCloneConvert = m_pDIBSource->CloneConvert(FXDIB_Rgb);
+      m_pCloneConvert = m_pDIBBase->CloneConvert(FXDIB_Rgb);
       if (!m_pCloneConvert)
         return false;
 
@@ -62,15 +59,15 @@
   int dest_left, dest_top;
   dest_left = dest_width > 0 ? image_rect.left : image_rect.right;
   dest_top = dest_height > 0 ? image_rect.top : image_rect.bottom;
-  if (m_pDIBSource->IsOpaqueImage()) {
+  if (m_pDIBBase->IsOpaqueImage()) {
     if (m_pDevice->StretchDIBitsWithFlagsAndBlend(
-            m_pDIBSource, dest_left, dest_top, dest_width, dest_height,
+            m_pDIBBase, dest_left, dest_top, dest_width, dest_height,
             FXDIB_INTERPOL, FXDIB_BLEND_NORMAL)) {
       return false;
     }
   }
-  if (m_pDIBSource->IsAlphaMask()) {
-    if (m_pDevice->StretchBitMaskWithFlags(m_pDIBSource, dest_left, dest_top,
+  if (m_pDIBBase->IsAlphaMask()) {
+    if (m_pDevice->StretchBitMaskWithFlags(m_pDIBBase, dest_left, dest_top,
                                            dest_width, dest_height, 0,
                                            FXDIB_INTERPOL)) {
       return false;
@@ -83,7 +80,7 @@
   FX_RECT dest_clip(
       dest_rect.left - image_rect.left, dest_rect.top - image_rect.top,
       dest_rect.right - image_rect.left, dest_rect.bottom - image_rect.top);
-  RetainPtr<CFX_DIBitmap> pStretched = m_pDIBSource->StretchTo(
+  RetainPtr<CFX_DIBitmap> pStretched = m_pDIBBase->StretchTo(
       dest_width, dest_height, FXDIB_INTERPOL, &dest_clip);
   if (pStretched)
     CompositeDIBitmap(pStretched, dest_rect.left, dest_rect.top);
diff --git a/xfa/fxfa/cxfa_imagerenderer.h b/xfa/fxfa/cxfa_imagerenderer.h
index 236c3cc..0b727c9 100644
--- a/xfa/fxfa/cxfa_imagerenderer.h
+++ b/xfa/fxfa/cxfa_imagerenderer.h
@@ -15,7 +15,7 @@
 #include "core/fxge/fx_dib.h"
 
 class CFX_RenderDevice;
-class CFX_DIBSource;
+class CFX_DIBBase;
 class CFX_DIBitmap;
 class CFX_ImageTransformer;
 class CFX_ImageRenderer;
@@ -23,7 +23,7 @@
 class CXFA_ImageRenderer {
  public:
   CXFA_ImageRenderer(CFX_RenderDevice* pDevice,
-                     const RetainPtr<CFX_DIBSource>& pDIBSource,
+                     const RetainPtr<CFX_DIBBase>& pDIBBase,
                      const CFX_Matrix* pImage2Device);
   ~CXFA_ImageRenderer();
 
@@ -38,7 +38,7 @@
   UnownedPtr<CFX_RenderDevice> m_pDevice;
   int m_Status = 0;
   CFX_Matrix m_ImageMatrix;
-  RetainPtr<CFX_DIBSource> m_pDIBSource;
+  RetainPtr<CFX_DIBBase> m_pDIBBase;
   RetainPtr<CFX_DIBitmap> m_pCloneConvert;
   std::unique_ptr<CFX_ImageTransformer> m_pTransformer;
   std::unique_ptr<CFX_ImageRenderer> m_DeviceHandle;
diff --git a/xfa/fxfa/fxfa.h b/xfa/fxfa/fxfa.h
index 254d99f..9030e87 100644
--- a/xfa/fxfa/fxfa.h
+++ b/xfa/fxfa/fxfa.h
@@ -12,7 +12,7 @@
 
 #include "core/fxcrt/fx_coordinates.h"
 #include "core/fxcrt/retain_ptr.h"
-#include "core/fxge/dib/cfx_dibsource.h"
+#include "core/fxge/dib/cfx_dibbase.h"
 #include "core/fxge/fx_dib.h"
 #include "xfa/fxfa/fxfa_basic.h"
 
diff --git a/xfa/fxgraphics/cxfa_graphics.cpp b/xfa/fxgraphics/cxfa_graphics.cpp
index 47e4b6b..628bd44 100644
--- a/xfa/fxgraphics/cxfa_graphics.cpp
+++ b/xfa/fxgraphics/cxfa_graphics.cpp
@@ -412,7 +412,7 @@
   }
 }
 
-void CXFA_Graphics::SetDIBitsWithMatrix(const RetainPtr<CFX_DIBSource>& source,
+void CXFA_Graphics::SetDIBitsWithMatrix(const RetainPtr<CFX_DIBBase>& source,
                                         const CFX_Matrix& matrix) {
   if (matrix.IsIdentity()) {
     m_renderDevice->SetDIBits(source, 0, 0);
diff --git a/xfa/fxgraphics/cxfa_graphics.h b/xfa/fxgraphics/cxfa_graphics.h
index 3eba531..3c9b269 100644
--- a/xfa/fxgraphics/cxfa_graphics.h
+++ b/xfa/fxgraphics/cxfa_graphics.h
@@ -87,7 +87,7 @@
                            FX_FillMode fillMode,
                            const CFX_Matrix& matrix);
 
-  void SetDIBitsWithMatrix(const RetainPtr<CFX_DIBSource>& source,
+  void SetDIBitsWithMatrix(const RetainPtr<CFX_DIBBase>& source,
                            const CFX_Matrix& matrix);
 
   CFX_RenderDevice* const m_renderDevice;  // Not owned.