Moved ambient lights out of SkLight's light array

src/core/SkLights.cpp

Index: src/core/SkLights.cpp
diff --git a/src/core/SkLights.cpp b/src/core/SkLights.cpp
index a172de4fabb52316e0c7c330170f3b6d6aec90e9..8a6dd49c308a90cdbd9e5d8d2afe6d3aa263e8a1 100644
--- a/src/core/SkLights.cpp
+++ b/src/core/SkLights.cpp
@@ -10,11 +10,18 @@
 #include "SkReadBuffer.h"
 
 sk_sp<SkLights> SkLights::MakeFromBuffer(SkReadBuffer& buf) {
+    Builder builder;
+
+    SkColor3f ambColor;
+    if (!buf.readScalarArray(&ambColor.fX, 3)) {
+        return nullptr;
+    }
+
+    builder.setAmbientLightColor(ambColor);
+
     int numLights = buf.readInt();
 
-    Builder builder;
     for (int l = 0; l < numLights; ++l) {
-        bool isAmbient = buf.readBool();
         bool isPoint = buf.readBool();
 
         SkColor3f color;
@@ -22,31 +29,27 @@ sk_sp<SkLights> SkLights::MakeFromBuffer(SkReadBuffer& buf) {
             return nullptr;
         }
 
-        if (isAmbient) {
-            builder.add(Light::MakeAmbient(color));
-        } else {
-            SkVector3 dirOrPos;
-            if (!buf.readScalarArray(&dirOrPos.fX, 3)) {
-                return nullptr;
-            }
+        SkVector3 dirOrPos;
+        if (!buf.readScalarArray(&dirOrPos.fX, 3)) {
+            return nullptr;
+        }
 
-            sk_sp<SkImage> depthMap;
-            bool hasShadowMap = buf.readBool();
-            if (hasShadowMap) {
-                if (!(depthMap = buf.readImage())) {
-                    return nullptr;
-                }
+        sk_sp<SkImage> depthMap;
+        bool hasShadowMap = buf.readBool();
+        if (hasShadowMap) {
+            if (!(depthMap = buf.readImage())) {
+                return nullptr;
             }
+        }
 
-            if (isPoint) {
-                Light light = Light::MakePoint(color, dirOrPos);
-                light.setShadowMap(depthMap);
-                builder.add(light);
-            } else {
-                Light light = Light::MakeDirectional(color, dirOrPos);
-                light.setShadowMap(depthMap);
-                builder.add(light);
-            }
+        if (isPoint) {
+            Light light = Light::MakePoint(color, dirOrPos);
+            light.setShadowMap(depthMap);
+            builder.add(light);
+        } else {
+            Light light = Light::MakeDirectional(color, dirOrPos);
+            light.setShadowMap(depthMap);
+            builder.add(light);
         }
     }
 
@@ -54,24 +57,21 @@ sk_sp<SkLights> SkLights::MakeFromBuffer(SkReadBuffer& buf) {
 }
 
 void SkLights::flatten(SkWriteBuffer& buf) const {
+    buf.writeScalarArray(&this->ambientLightColor().fX, 3);
 
     buf.writeInt(this->numLights());
     for (int l = 0; l < this->numLights(); ++l) {
         const Light& light = this->light(l);
 
-        bool isAmbient = Light::kAmbient_LightType == light.type();
         bool isPoint = Light::kPoint_LightType == light.type();
 
-        buf.writeBool(isAmbient);
         buf.writeBool(isPoint);
         buf.writeScalarArray(&light.color().fX, 3);
-        if (!isAmbient) {
-            buf.writeScalarArray(&light.dir().fX, 3);
-            bool hasShadowMap = light.getShadowMap() != nullptr;
-            buf.writeBool(hasShadowMap);
-            if (hasShadowMap) {
-                buf.writeImage(light.getShadowMap());
-            }
+        buf.writeScalarArray(&light.dir().fX, 3);
+        bool hasShadowMap = light.getShadowMap() != nullptr;
+        buf.writeBool(hasShadowMap);
+        if (hasShadowMap) {
+            buf.writeImage(light.getShadowMap());
         }
     }
 }