Implement path cover with nv_path_rendering

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 239ae6bd8362d3dbd25a7ca8b76027f8169afb6f..01e097126f37b484aaa7346982383cc64b586d73 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -335,12 +335,17 @@ public:
                                                  // clipping.
     };
 
+    void setStencilPathSettings(const GrStencilSettings& settings) {
+        fStencilPathSettings = settings;
+    }
+
 protected:
     enum DrawType {
         kDrawPoints_DrawType,
         kDrawLines_DrawType,
         kDrawTriangles_DrawType,
         kStencilPath_DrawType,
+        kDrawPath_DrawType,
     };
 
     DrawType PrimTypeToDrawType(GrPrimitiveType type) {
@@ -397,6 +402,7 @@ protected:
 
     // The final stencil settings to use as determined by the clip manager.
     GrStencilSettings fStencilSettings;
+    GrStencilSettings fStencilPathSettings;
 
     // Derived classes need access to this so they can fill it out in their
     // constructors
@@ -440,15 +446,12 @@ private:
 
     // overridden by backend-specific derived class to perform the draw call.
     virtual void onGpuDraw(const DrawInfo&) = 0;
-    // when GrDrawTarget::stencilPath is called the draw state's current stencil
-    // settings are ignored. Instead the GrGpu decides the stencil rules
-    // necessary to stencil the path. These are still subject to filtering by
-    // the clip mask manager.
-    virtual void setStencilPathSettings(const GrPath&,
-                                        SkPath::FillType,
-                                        GrStencilSettings* settings) = 0;
+
     // overridden by backend-specific derived class to perform the path stenciling.
+    virtual const GrStencilSettings& getStencilPathSettings(const GrPath&,
+                                                            SkPath::FillType) = 0;
     virtual void onGpuStencilPath(const GrPath*, SkPath::FillType) = 0;
+    virtual void onGpuDrawPath(const GrPath*, SkPath::FillType) = 0;
 
     // overridden by backend-specific derived class to perform flush
     virtual void onForceRenderTargetFlush() = 0;
@@ -494,6 +497,9 @@ private:
     virtual void onStencilPath(const GrPath* path, const SkStrokeRec& stroke,
                                SkPath::FillType) SK_OVERRIDE;
 
+    virtual void onDrawPath(const GrPath* path, const SkStrokeRec& stroke,
+                               SkPath::FillType) SK_OVERRIDE;
+
     // readies the pools to provide vertex/index data.
     void prepareVertexPool();
     void prepareIndexPool();