LightingFP now supports multiple directional lights

include/core/SkLights.h

 
 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkLights_DEFINED
 #define SkLights_DEFINED
@@ skipping 69 matching lines @@
             if (this == &b) {
                 return *this;
             }
 
             fColor = b.fColor;
             fType = b.fType;
             fDirection = b.fDirection;
             fShadowMap = b.fShadowMap;
             return *this;
         }
+
+        bool operator== (const Light& b) {
+            if (this == &b) {
+                return true;
+            }
+
+            return (fColor     == b.fColor) &&
+                   (fType      == b.fType) &&
+                   (fDirection == b.fDirection) &&
+                   (fShadowMap == b.fShadowMap);
+        }
+
+        bool operator!= (const Light& b) { return !(this->operator==(b)); }
+
     private:
         LightType   fType;
         SkColor3f   fColor;           // linear (unpremul) color. Range is 0..1 in each channel.
         SkVector3   fDirection;       // For directional lights, holds the direction towards the
                                       // light (+Z is out of the screen).
                                       // If degenerate, it will be replaced with (0, 0, 1).
                                       // For point lights, holds location of point light
         sk_sp<SkImage> fShadowMap;
 
         Light(LightType type, const SkColor3f& color, const SkVector3& dir) {
@@ skipping 43 matching lines @@
 
     void flatten(SkWriteBuffer& buf) const;
 
 private:
     SkLights() {}
     SkTArray<Light> fLights;
     typedef SkRefCnt INHERITED;
 };
 
 #endif