2 files changed, 4 insertions, 1 deletions
diff --git a/core/fpdfapi/page/cpdf_page.cpp b/core/fpdfapi/page/cpdf_page.cpp
index 092a1cad41..075aa9023d 100644
--- a/core/fpdfapi/page/cpdf_page.cpp
+++ b/core/fpdfapi/page/cpdf_page.cpp
@@ -183,7 +183,9 @@ int CPDF_Page::GetPageRotation() const {
 bool GraphicsData::operator<(const GraphicsData& other) const {
   if (fillAlpha != other.fillAlpha)
     return fillAlpha < other.fillAlpha;
-  return strokeAlpha < other.strokeAlpha;
+  if (strokeAlpha != other.strokeAlpha)
+    return strokeAlpha < other.strokeAlpha;
+  return blendType < other.blendType;
 }
 
 bool FontData::operator<(const FontData& other) const {
diff --git a/core/fpdfapi/page/cpdf_page.h b/core/fpdfapi/page/cpdf_page.h
index 77cc793d81..0a080a58ae 100644
--- a/core/fpdfapi/page/cpdf_page.h
+++ b/core/fpdfapi/page/cpdf_page.h
@@ -26,6 +26,7 @@ class CPDF_PageRenderContext;
 struct GraphicsData {
   float fillAlpha;
   float strokeAlpha;
+  int blendType;
   bool operator<(const GraphicsData& other) const;
 };