support gradients and stroke+fill

core/include/fxge/fx_ge.h

Index: core/include/fxge/fx_ge.h
diff --git a/core/include/fxge/fx_ge.h b/core/include/fxge/fx_ge.h
index 8e9df8c5443efe03109f7ece6833d670b4f32148..fd265a37b7460bd2dc9f8629d337db52e109aeed 100644
--- a/core/include/fxge/fx_ge.h
+++ b/core/include/fxge/fx_ge.h
@@ -14,6 +14,7 @@ class CFX_Font;
 class CFX_FontMgr;
 class CFX_FontCache;
 class CFX_FaceCache;
+class CPDF_ShadingPattern;
 class IFX_RenderDeviceDriver;
 class CCodec_ModuleMgr;
 class SkPictureRecorder;
@@ -215,6 +216,8 @@ class CFX_GraphStateData {
 #define FXRC_BITMASK_OUTPUT 0x400
 #define FXRC_BYTEMASK_OUTPUT 0x800
 #define FXRENDER_IMAGE_LOSSY 0x1000
+#define FXRC_FILLSTROKE_PATH 0x2000
+#define FXRC_SHADING 0x4000
 #define FXFILL_ALTERNATE 1
 #define FXFILL_WINDING 2
 #define FXFILL_FULLCOVER 4
@@ -592,6 +595,13 @@ class IFX_RenderDeviceDriver {
   virtual int GetDriverType() { return 0; }
 
   virtual void ClearDriver() {}
+
+  virtual FX_BOOL DrawShading(CPDF_ShadingPattern* pPattern,
+                              CFX_Matrix* pMatrix,
+                              int alpha,
+                              FX_BOOL bAlphaMode) {
+    return false;
+  }
 };
 
 class IFX_PSOutput {