diff --git a/core/fxge/agg/fx_agg_driver.cpp b/core/fxge/agg/fx_agg_driver.cpp
index b20e46d..5571076 100644
--- a/core/fxge/agg/fx_agg_driver.cpp
+++ b/core/fxge/agg/fx_agg_driver.cpp
@@ -1493,7 +1493,7 @@
 
 bool CFX_AggDeviceDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                     uint32_t argb,
-                                    const FX_RECT* pSrcRect,
+                                    const FX_RECT& src_rect,
                                     int left,
                                     int top,
                                     BlendMode blend_type) {
@@ -1501,14 +1501,14 @@
     return true;
 
   if (pBitmap->IsAlphaMask()) {
-    return m_pBitmap->CompositeMask(left, top, pSrcRect->Width(),
-                                    pSrcRect->Height(), pBitmap, argb,
-                                    pSrcRect->left, pSrcRect->top, blend_type,
+    return m_pBitmap->CompositeMask(left, top, src_rect.Width(),
+                                    src_rect.Height(), pBitmap, argb,
+                                    src_rect.left, src_rect.top, blend_type,
                                     m_pClipRgn.get(), m_bRgbByteOrder, 0);
   }
   return m_pBitmap->CompositeBitmap(
-      left, top, pSrcRect->Width(), pSrcRect->Height(), pBitmap, pSrcRect->left,
-      pSrcRect->top, blend_type, m_pClipRgn.get(), m_bRgbByteOrder);
+      left, top, src_rect.Width(), src_rect.Height(), pBitmap, src_rect.left,
+      src_rect.top, blend_type, m_pClipRgn.get(), m_bRgbByteOrder);
 }
 
 bool CFX_AggDeviceDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource,
@@ -1526,7 +1526,7 @@
   if (dest_width == pSource->GetWidth() &&
       dest_height == pSource->GetHeight()) {
     FX_RECT rect(0, 0, dest_width, dest_height);
-    return SetDIBits(pSource, argb, &rect, dest_left, dest_top, blend_type);
+    return SetDIBits(pSource, argb, rect, dest_left, dest_top, blend_type);
   }
   FX_RECT dest_rect(dest_left, dest_top, dest_left + dest_width,
                     dest_top + dest_height);
diff --git a/core/fxge/agg/fx_agg_driver.h b/core/fxge/agg/fx_agg_driver.h
index bb3062b..00cae08 100644
--- a/core/fxge/agg/fx_agg_driver.h
+++ b/core/fxge/agg/fx_agg_driver.h
@@ -69,7 +69,7 @@
   RetainPtr<CFX_DIBitmap> GetBackDrop() override;
   bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
-                 const FX_RECT* pSrcRect,
+                 const FX_RECT& src_rect,
                  int left,
                  int top,
                  BlendMode blend_type) override;
diff --git a/core/fxge/cfx_renderdevice.cpp b/core/fxge/cfx_renderdevice.cpp
index 11b5c4c..4b082a3 100644
--- a/core/fxge/cfx_renderdevice.cpp
+++ b/core/fxge/cfx_renderdevice.cpp
@@ -664,7 +664,7 @@
   bitmap_device.GetDeviceDriver()->Flush();
 #endif
   FX_RECT src_rect(0, 0, rect.Width(), rect.Height());
-  return m_pDeviceDriver->SetDIBits(bitmap, 0, &src_rect, rect.left, rect.top,
+  return m_pDeviceDriver->SetDIBits(bitmap, 0, src_rect, rect.left, rect.top,
                                     BlendMode::kNormal);
 }
 
@@ -689,7 +689,7 @@
     return false;
   }
   FX_RECT src_rect(0, 0, rect.Width(), rect.Height());
-  m_pDeviceDriver->SetDIBits(bitmap, 0, &src_rect, rect.left, rect.top,
+  m_pDeviceDriver->SetDIBits(bitmap, 0, src_rect, rect.left, rect.top,
                              BlendMode::kNormal);
   return true;
 }
@@ -738,7 +738,7 @@
                    dest_rect.top - top + dest_rect.Height());
   if ((blend_mode == BlendMode::kNormal || (m_RenderCaps & FXRC_BLEND_MODE)) &&
       (!pBitmap->HasAlpha() || (m_RenderCaps & FXRC_ALPHA_IMAGE))) {
-    return m_pDeviceDriver->SetDIBits(pBitmap, 0, &src_rect, dest_rect.left,
+    return m_pDeviceDriver->SetDIBits(pBitmap, 0, src_rect, dest_rect.left,
                                       dest_rect.top, blend_mode);
   }
   if (!(m_RenderCaps & FXRC_GET_BITS))
@@ -761,7 +761,7 @@
     return false;
   }
   FX_RECT rect(0, 0, bg_pixel_width, bg_pixel_height);
-  return m_pDeviceDriver->SetDIBits(background, 0, &rect, dest_rect.left,
+  return m_pDeviceDriver->SetDIBits(background, 0, rect, dest_rect.left,
                                     dest_rect.top, BlendMode::kNormal);
 }
 
@@ -786,7 +786,7 @@
                                   int top,
                                   uint32_t argb) {
   FX_RECT src_rect(0, 0, pBitmap->GetWidth(), pBitmap->GetHeight());
-  return m_pDeviceDriver->SetDIBits(pBitmap, argb, &src_rect, left, top,
+  return m_pDeviceDriver->SetDIBits(pBitmap, argb, src_rect, left, top,
                                     BlendMode::kNormal);
 }
 
diff --git a/core/fxge/renderdevicedriver_iface.h b/core/fxge/renderdevicedriver_iface.h
index 17aa10f..8513f31 100644
--- a/core/fxge/renderdevicedriver_iface.h
+++ b/core/fxge/renderdevicedriver_iface.h
@@ -66,7 +66,7 @@
   virtual RetainPtr<CFX_DIBitmap> GetBackDrop();
   virtual bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                          uint32_t color,
-                         const FX_RECT* pSrcRect,
+                         const FX_RECT& src_rect,
                          int dest_left,
                          int dest_top,
                          BlendMode blend_type) = 0;
diff --git a/core/fxge/skia/fx_skia_device.cpp b/core/fxge/skia/fx_skia_device.cpp
index d4a67be..e0010cd 100644
--- a/core/fxge/skia/fx_skia_device.cpp
+++ b/core/fxge/skia/fx_skia_device.cpp
@@ -2238,7 +2238,7 @@
 
 bool CFX_SkiaDeviceDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                      uint32_t argb,
-                                     const FX_RECT* pSrcRect,
+                                     const FX_RECT& src_rect,
                                      int left,
                                      int top,
                                      BlendMode blend_type) {
@@ -2255,14 +2255,14 @@
 #ifdef _SKIA_SUPPORT_PATHS_
   Flush();
   if (pBitmap->IsAlphaMask()) {
-    return m_pBitmap->CompositeMask(left, top, pSrcRect->Width(),
-                                    pSrcRect->Height(), pBitmap, argb,
-                                    pSrcRect->left, pSrcRect->top, blend_type,
+    return m_pBitmap->CompositeMask(left, top, src_rect.Width(),
+                                    src_rect.Height(), pBitmap, argb,
+                                    src_rect.left, src_rect.top, blend_type,
                                     m_pClipRgn.get(), m_bRgbByteOrder, 0);
   }
   return m_pBitmap->CompositeBitmap(
-      left, top, pSrcRect->Width(), pSrcRect->Height(), pBitmap, pSrcRect->left,
-      pSrcRect->top, blend_type, m_pClipRgn.get(), m_bRgbByteOrder);
+      left, top, src_rect.Width(), src_rect.Height(), pBitmap, src_rect.left,
+      src_rect.top, blend_type, m_pClipRgn.get(), m_bRgbByteOrder);
 #endif  // _SKIA_SUPPORT_PATHS_
 }
 
@@ -2297,7 +2297,7 @@
   if (dest_width == pSource->GetWidth() &&
       dest_height == pSource->GetHeight()) {
     FX_RECT rect(0, 0, dest_width, dest_height);
-    return SetDIBits(pSource, argb, &rect, dest_left, dest_top, blend_type);
+    return SetDIBits(pSource, argb, rect, dest_left, dest_top, blend_type);
   }
   Flush();
   FX_RECT dest_rect(dest_left, dest_top, dest_left + dest_width,
diff --git a/core/fxge/skia/fx_skia_device.h b/core/fxge/skia/fx_skia_device.h
index e3a48b1..7c9dfec 100644
--- a/core/fxge/skia/fx_skia_device.h
+++ b/core/fxge/skia/fx_skia_device.h
@@ -85,7 +85,7 @@
 
   bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
-                 const FX_RECT* pSrcRect,
+                 const FX_RECT& src_rect,
                  int dest_left,
                  int dest_top,
                  BlendMode blend_type) override;
diff --git a/core/fxge/win32/fx_win32_device.cpp b/core/fxge/win32/fx_win32_device.cpp
index 4b0b01e..2bacc44 100644
--- a/core/fxge/win32/fx_win32_device.cpp
+++ b/core/fxge/win32/fx_win32_device.cpp
@@ -767,7 +767,7 @@
 }
 
 bool CGdiDeviceDriver::GDI_SetDIBits(const RetainPtr<CFX_DIBitmap>& pBitmap1,
-                                     const FX_RECT* pSrcRect,
+                                     const FX_RECT& src_rect,
                                      int left,
                                      int top) {
   if (m_DeviceClass == FXDC_PRINTER) {
@@ -778,32 +778,31 @@
     if (pBitmap->IsCmykImage() && !pBitmap->ConvertFormat(FXDIB_Rgb))
       return false;
 
-    int width = pSrcRect->Width(), height = pSrcRect->Height();
     LPBYTE pBuffer = pBitmap->GetBuffer();
     ByteString info = CFX_WindowsDIB::GetBitmapInfo(pBitmap);
     ((BITMAPINFOHEADER*)info.c_str())->biHeight *= -1;
-    FX_RECT dst_rect(0, 0, width, height);
+    FX_RECT dst_rect(0, 0, src_rect.Width(), src_rect.Height());
     dst_rect.Intersect(0, 0, pBitmap->GetWidth(), pBitmap->GetHeight());
     int dst_width = dst_rect.Width();
     int dst_height = dst_rect.Height();
     ::StretchDIBits(m_hDC, left, top, dst_width, dst_height, 0, 0, dst_width,
                     dst_height, pBuffer, (BITMAPINFO*)info.c_str(),
                     DIB_RGB_COLORS, SRCCOPY);
-  } else {
-    RetainPtr<CFX_DIBitmap> pBitmap = pBitmap1;
-    if (pBitmap->IsCmykImage()) {
-      pBitmap = pBitmap->CloneConvert(FXDIB_Rgb);
-      if (!pBitmap)
-        return false;
-    }
-    int width = pSrcRect->Width(), height = pSrcRect->Height();
-    LPBYTE pBuffer = pBitmap->GetBuffer();
-    ByteString info = CFX_WindowsDIB::GetBitmapInfo(pBitmap);
-    ::SetDIBitsToDevice(m_hDC, left, top, width, height, pSrcRect->left,
-                        pBitmap->GetHeight() - pSrcRect->bottom, 0,
-                        pBitmap->GetHeight(), pBuffer,
-                        (BITMAPINFO*)info.c_str(), DIB_RGB_COLORS);
+    return true;
   }
+
+  RetainPtr<CFX_DIBitmap> pBitmap = pBitmap1;
+  if (pBitmap->IsCmykImage()) {
+    pBitmap = pBitmap->CloneConvert(FXDIB_Rgb);
+    if (!pBitmap)
+      return false;
+  }
+  LPBYTE pBuffer = pBitmap->GetBuffer();
+  ByteString info = CFX_WindowsDIB::GetBitmapInfo(pBitmap);
+  ::SetDIBitsToDevice(m_hDC, left, top, src_rect.Width(), src_rect.Height(),
+                      src_rect.left, pBitmap->GetHeight() - src_rect.bottom, 0,
+                      pBitmap->GetHeight(), pBuffer, (BITMAPINFO*)info.c_str(),
+                      DIB_RGB_COLORS);
   return true;
 }
 
@@ -1188,7 +1187,7 @@
 
 bool CGdiDisplayDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                   uint32_t color,
-                                  const FX_RECT* pSrcRect,
+                                  const FX_RECT& src_rect,
                                   int left,
                                   int top,
                                   BlendMode blend_type) {
@@ -1204,33 +1203,35 @@
                                      BlendMode::kNormal, nullptr, false, 0)) {
         return false;
       }
-      FX_RECT src_rect(0, 0, width, height);
-      return SetDIBits(background, 0, &src_rect, left, top, BlendMode::kNormal);
+      FX_RECT alpha_src_rect(0, 0, width, height);
+      return SetDIBits(background, 0, alpha_src_rect, left, top,
+                       BlendMode::kNormal);
     }
-    FX_RECT clip_rect(left, top, left + pSrcRect->Width(),
-                      top + pSrcRect->Height());
-    return StretchDIBits(pSource, color, left - pSrcRect->left,
-                         top - pSrcRect->top, width, height, &clip_rect, 0,
+    FX_RECT clip_rect(left, top, left + src_rect.Width(),
+                      top + src_rect.Height());
+    return StretchDIBits(pSource, color, left - src_rect.left,
+                         top - src_rect.top, width, height, &clip_rect, 0,
                          BlendMode::kNormal);
   }
-  int width = pSrcRect->Width(), height = pSrcRect->Height();
+  int width = src_rect.Width();
+  int height = src_rect.Height();
   if (pSource->HasAlpha()) {
     auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
     if (!bitmap->Create(width, height, FXDIB_Rgb) ||
         !GetDIBits(bitmap, left, top) ||
-        !bitmap->CompositeBitmap(0, 0, width, height, pSource, pSrcRect->left,
-                                 pSrcRect->top, BlendMode::kNormal, nullptr,
+        !bitmap->CompositeBitmap(0, 0, width, height, pSource, src_rect.left,
+                                 src_rect.top, BlendMode::kNormal, nullptr,
                                  false)) {
       return false;
     }
-    FX_RECT src_rect(0, 0, width, height);
-    return SetDIBits(bitmap, 0, &src_rect, left, top, BlendMode::kNormal);
+    FX_RECT alpha_src_rect(0, 0, width, height);
+    return SetDIBits(bitmap, 0, alpha_src_rect, left, top, BlendMode::kNormal);
   }
   CFX_DIBExtractor temp(pSource);
   RetainPtr<CFX_DIBitmap> pBitmap = temp.GetBitmap();
   if (!pBitmap)
     return false;
-  return GDI_SetDIBits(pBitmap, pSrcRect, left, top);
+  return GDI_SetDIBits(pBitmap, src_rect, left, top);
 }
 
 bool CGdiDisplayDriver::UseFoxitStretchEngine(
@@ -1256,8 +1257,8 @@
     return true;
 
   FX_RECT src_rect(0, 0, pStretched->GetWidth(), pStretched->GetHeight());
-  return SetDIBits(pStretched, color, &src_rect, pClipRect->left,
-                   pClipRect->top, BlendMode::kNormal);
+  return SetDIBits(pStretched, color, src_rect, pClipRect->left, pClipRect->top,
+                   BlendMode::kNormal);
 }
 
 bool CGdiDisplayDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource,
@@ -1301,7 +1302,7 @@
     }
 
     FX_RECT src_rect(0, 0, clip_width, clip_height);
-    return SetDIBits(background, 0, &src_rect, image_rect.left + clip_rect.left,
+    return SetDIBits(background, 0, src_rect, image_rect.left + clip_rect.left,
                      image_rect.top + clip_rect.top, BlendMode::kNormal);
   }
   if (pSource->HasAlpha()) {
diff --git a/core/fxge/win32/fx_win32_print.cpp b/core/fxge/win32/fx_win32_print.cpp
index b92a46d..fce378c 100644
--- a/core/fxge/win32/fx_win32_print.cpp
+++ b/core/fxge/win32/fx_win32_print.cpp
@@ -70,19 +70,19 @@
 
 bool CGdiPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pSource,
                                   uint32_t color,
-                                  const FX_RECT* pSrcRect,
+                                  const FX_RECT& src_rect,
                                   int left,
                                   int top,
                                   BlendMode blend_type) {
   if (pSource->IsAlphaMask()) {
-    FX_RECT clip_rect(left, top, left + pSrcRect->Width(),
-                      top + pSrcRect->Height());
-    return StretchDIBits(pSource, color, left - pSrcRect->left,
-                         top - pSrcRect->top, pSource->GetWidth(),
+    FX_RECT clip_rect(left, top, left + src_rect.Width(),
+                      top + src_rect.Height());
+    return StretchDIBits(pSource, color, left - src_rect.left,
+                         top - src_rect.top, pSource->GetWidth(),
                          pSource->GetHeight(), &clip_rect, 0,
                          BlendMode::kNormal);
   }
-  ASSERT(pSource && !pSource->IsAlphaMask() && pSrcRect);
+  ASSERT(pSource && !pSource->IsAlphaMask());
   ASSERT(blend_type == BlendMode::kNormal);
   if (pSource->HasAlpha())
     return false;
@@ -92,7 +92,7 @@
   if (!pBitmap)
     return false;
 
-  return GDI_SetDIBits(pBitmap, pSrcRect, left, top);
+  return GDI_SetDIBits(pBitmap, src_rect, left, top);
 }
 
 bool CGdiPrinterDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource,
@@ -455,7 +455,7 @@
 
 bool CPSPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                  uint32_t color,
-                                 const FX_RECT* pSrcRect,
+                                 const FX_RECT& src_rect,
                                  int left,
                                  int top,
                                  BlendMode blend_type) {
@@ -566,7 +566,7 @@
 
 bool CTextOnlyPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                                        uint32_t color,
-                                       const FX_RECT* pSrcRect,
+                                       const FX_RECT& src_rect,
                                        int left,
                                        int top,
                                        BlendMode blend_type) {
diff --git a/core/fxge/win32/win32_int.h b/core/fxge/win32/win32_int.h
index c23cc8b..43ec605 100644
--- a/core/fxge/win32/win32_int.h
+++ b/core/fxge/win32/win32_int.h
@@ -98,7 +98,7 @@
   void DrawLine(float x1, float y1, float x2, float y2);
 
   bool GDI_SetDIBits(const RetainPtr<CFX_DIBitmap>& pBitmap,
-                     const FX_RECT* pSrcRect,
+                     const FX_RECT& src_rect,
                      int left,
                      int top);
   bool GDI_StretchDIBits(const RetainPtr<CFX_DIBitmap>& pBitmap,
@@ -135,7 +135,7 @@
                  int top) override;
   bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
-                 const FX_RECT* pSrcRect,
+                 const FX_RECT& src_rect,
                  int left,
                  int top,
                  BlendMode blend_type) override;
@@ -174,7 +174,7 @@
   int GetDeviceCaps(int caps_id) const override;
   bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
-                 const FX_RECT* pSrcRect,
+                 const FX_RECT& src_rect,
                  int left,
                  int top,
                  BlendMode blend_type) override;
@@ -233,7 +233,7 @@
   bool GetClipBox(FX_RECT* pRect) override;
   bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
-                 const FX_RECT* pSrcRect,
+                 const FX_RECT& src_rect,
                  int left,
                  int top,
                  BlendMode blend_type) override;
@@ -296,7 +296,7 @@
   bool GetClipBox(FX_RECT* pRect) override;
   bool SetDIBits(const RetainPtr<CFX_DIBBase>& pBitmap,
                  uint32_t color,
-                 const FX_RECT* pSrcRect,
+                 const FX_RECT& src_rect,
                  int left,
                  int top,
                  BlendMode blend_type) override;