diff --git a/core/fxge/cfx_renderdevice.cpp b/core/fxge/cfx_renderdevice.cpp
index fdfdd6a..b1474c5 100644
--- a/core/fxge/cfx_renderdevice.cpp
+++ b/core/fxge/cfx_renderdevice.cpp
@@ -458,6 +458,10 @@
       m_RenderCaps & FXRC_ALPHA_OUTPUT ? FXDIB_Argb : kPlatformFormat);
 }
 
+void CFX_RenderDevice::SetBaseClip(const FX_RECT& rect) {
+  m_pDeviceDriver->SetBaseClip(rect);
+}
+
 bool CFX_RenderDevice::SetClip_PathFill(const CFX_PathData* pPathData,
                                         const CFX_Matrix* pObject2Device,
                                         int fill_mode) {
diff --git a/core/fxge/cfx_renderdevice.h b/core/fxge/cfx_renderdevice.h
index b8d9221..755f445 100644
--- a/core/fxge/cfx_renderdevice.h
+++ b/core/fxge/cfx_renderdevice.h
@@ -67,13 +67,14 @@
                               int width,
                               int height) const;
   const FX_RECT& GetClipBox() const { return m_ClipBox; }
-  bool SetClip_Rect(const FX_RECT& pRect);
+  void SetBaseClip(const FX_RECT& rect);
   bool SetClip_PathFill(const CFX_PathData* pPathData,
                         const CFX_Matrix* pObject2Device,
                         int fill_mode);
   bool SetClip_PathStroke(const CFX_PathData* pPathData,
                           const CFX_Matrix* pObject2Device,
                           const CFX_GraphStateData* pGraphState);
+  bool SetClip_Rect(const FX_RECT& pRect);
   bool DrawPath(const CFX_PathData* pPathData,
                 const CFX_Matrix* pObject2Device,
                 const CFX_GraphStateData* pGraphState,
diff --git a/core/fxge/renderdevicedriver_iface.cpp b/core/fxge/renderdevicedriver_iface.cpp
index acb81d6..f8fcccf 100644
--- a/core/fxge/renderdevicedriver_iface.cpp
+++ b/core/fxge/renderdevicedriver_iface.cpp
@@ -25,6 +25,8 @@
   return false;
 }
 
+void RenderDeviceDriverIface::SetBaseClip(const FX_RECT& rect) {}
+
 bool RenderDeviceDriverIface::SetPixel(int x, int y, uint32_t color) {
   return false;
 }
diff --git a/core/fxge/renderdevicedriver_iface.h b/core/fxge/renderdevicedriver_iface.h
index 7524f90..69e404b 100644
--- a/core/fxge/renderdevicedriver_iface.h
+++ b/core/fxge/renderdevicedriver_iface.h
@@ -44,6 +44,7 @@
   virtual void SaveState() = 0;
   virtual void RestoreState(bool bKeepSaved) = 0;
 
+  virtual void SetBaseClip(const FX_RECT& rect);
   virtual bool SetClip_PathFill(const CFX_PathData* pPathData,
                                 const CFX_Matrix* pObject2Device,
                                 int fill_mode) = 0;
diff --git a/core/fxge/win32/fx_win32_device.cpp b/core/fxge/win32/fx_win32_device.cpp
index 80b9d36..bb13a76 100644
--- a/core/fxge/win32/fx_win32_device.cpp
+++ b/core/fxge/win32/fx_win32_device.cpp
@@ -1078,6 +1078,10 @@
   return true;
 }
 
+void CGdiDeviceDriver::SetBaseClip(const FX_RECT& rect) {
+  m_BaseClipBox = rect;
+}
+
 bool CGdiDeviceDriver::SetClip_PathFill(const CFX_PathData* pPathData,
                                         const CFX_Matrix* pMatrix,
                                         int fill_mode) {
@@ -1085,6 +1089,10 @@
     CFX_FloatRect rectf;
     if (pPathData->IsRect(pMatrix, &rectf)) {
       FX_RECT rect = rectf.GetOuterRect();
+      // Can easily apply base clip to protect against wildly large rectangular
+      // clips. crbug.com/1019026
+      if (m_BaseClipBox.has_value())
+        rect.Intersect(m_BaseClipBox.value());
       return IntersectClipRect(m_hDC, rect.left, rect.top, rect.right,
                                rect.bottom) != ERROR;
     }
diff --git a/core/fxge/win32/fx_win32_device_embeddertest.cpp b/core/fxge/win32/fx_win32_device_embeddertest.cpp
index 91daa20..cb088e7 100644
--- a/core/fxge/win32/fx_win32_device_embeddertest.cpp
+++ b/core/fxge/win32/fx_win32_device_embeddertest.cpp
@@ -9,6 +9,7 @@
 #include <memory>
 
 #include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/base/ptr_util.h"
 
 namespace {
 
@@ -23,7 +24,7 @@
     m_hDC = CreateCompatibleDC(nullptr);
     ASSERT_TRUE(m_hDC);
     CFX_GEModule::Create(nullptr);
-    m_driver = std::make_unique<CFX_WindowsRenderDevice>(m_hDC, nullptr);
+    m_driver = pdfium::MakeUnique<CFX_WindowsRenderDevice>(m_hDC, nullptr);
     m_driver->SaveState();
   }
 
@@ -75,3 +76,17 @@
   EXPECT_FALSE(
       m_driver->SetClip_PathFill(&path_data, &kIdentityMatrix, FXFILL_WINDING));
 }
+
+TEST_F(CFX_WindowsRenderDeviceTest, GargantuanClipRectWithBaseClip) {
+  CFX_PathData path_data;
+  const FX_RECT kBaseClip(0, 0, 5100, 6600);
+
+  m_driver->SetBaseClip(kBaseClip);
+  path_data.AppendRect(-257698020.0f, -257697252.0f, 257698044.0f,
+                       257698812.0f);
+  path_data.ClosePath();
+  // Use of a reasonable base clip ensures that we avoid getting an error back
+  // from GDI API IntersectClipRect().
+  EXPECT_TRUE(
+      m_driver->SetClip_PathFill(&path_data, &kIdentityMatrix, FXFILL_WINDING));
+}
diff --git a/core/fxge/win32/win32_int.h b/core/fxge/win32/win32_int.h
index 77d746e..7f299ef 100644
--- a/core/fxge/win32/win32_int.h
+++ b/core/fxge/win32/win32_int.h
@@ -19,6 +19,7 @@
 #include "core/fxge/renderdevicedriver_iface.h"
 #include "core/fxge/win32/cfx_psrenderer.h"
 #include "core/fxge/win32/cpsoutput.h"
+#include "third_party/base/optional.h"
 
 class CFX_ImageRenderer;
 class TextCharPos;
@@ -81,6 +82,7 @@
   int GetDeviceCaps(int caps_id) const override;
   void SaveState() override;
   void RestoreState(bool bKeepSaved) override;
+  void SetBaseClip(const FX_RECT& rect) override;
   bool SetClip_PathFill(const CFX_PathData* pPathData,
                         const CFX_Matrix* pObject2Device,
                         int fill_mode) override;
@@ -129,6 +131,7 @@
   int m_nBitsPerPixel;
   const DeviceType m_DeviceType;
   int m_RenderCaps;
+  pdfium::Optional<FX_RECT> m_BaseClipBox;
 };
 
 class CGdiDisplayDriver final : public CGdiDeviceDriver {
diff --git a/fpdfsdk/fpdf_view.cpp b/fpdfsdk/fpdf_view.cpp
index a735554..a4a70f4 100644
--- a/fpdfsdk/fpdf_view.cpp
+++ b/fpdfsdk/fpdf_view.cpp
@@ -107,6 +107,7 @@
       pdfium::MakeRetain<CPDF_OCContext>(pPage->GetDocument(), usage));
 
   pContext->m_pDevice->SaveState();
+  pContext->m_pDevice->SetBaseClip(clipping_rect);
   pContext->m_pDevice->SetClip_Rect(clipping_rect);
   pContext->m_pContext = pdfium::MakeUnique<CPDF_RenderContext>(pPage);
   pContext->m_pContext->AppendLayer(pPage, &matrix);