Added PointLights to SkLights::Light

src/core/SkLights.cpp

Index: src/core/SkLights.cpp
diff --git a/src/core/SkLights.cpp b/src/core/SkLights.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..5558cb09c94c9821be861859e74f19fa9393160e
--- /dev/null
+++ b/src/core/SkLights.cpp
@@ -0,0 +1,105 @@
+
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkLights.h"
+#include "SkReadBuffer.h"
+
+SkLights::Light::Light(LightType type, const SkColor3f color, const SkVector3 dir) {
+    fType = type;
+    fColor = color;
+    fDirection = dir;
+}
+
+void SkLights::Builder::add(const SkLights::Light& light) {
+    if (fLights) {
+        fLights->fLights.push_back(light);
+    }
+}
+
+void SkLights::Builder::add(SkLights::Light&& light) {
+    if (fLights) {
+        fLights->fLights.push_back(std::move(light));
+    }
+}
+
+sk_sp<SkLights> SkLights::Builder::finish() {
+    return std::move(fLights);
+}
+
+int SkLights::numLights() const {
+    return fLights.count();
+}
+
+const SkLights::Light& SkLights::light(int index) const {
+    return fLights[index];
+}
+
+SkLights::Light& SkLights::light(int index) {
+    return fLights[index];
+}
+
+sk_sp<SkLights> SkLights::MakeFromBuffer(SkReadBuffer& buf) {
+    int numLights = buf.readInt();
+
+    Builder builder;
+    for (int l = 0; l < numLights; ++l) {
+        bool isAmbient = buf.readBool();
+        bool isPoint = buf.readBool();
+
+        SkColor3f color;
+        if (!buf.readScalarArray(&color.fX, 3)) {
+            return nullptr;
+        }
+
+        if (isAmbient) {
+            builder.add(Light::MakeAmbient(color));
+        } else {
+            SkVector3 dirOrPos;
+            if (!buf.readScalarArray(&dirOrPos.fX, 3)) {
+                return nullptr;
+            }
+
+            sk_sp<SkImage> depthMap;

[robertphillips, 2016/08/12 13:34:48]

Not all lights need to have a shadow map!

[vjiaoblack, 2016/08/12 14:12:10]

Done.

+            if (!(depthMap = sk_ref_sp<SkImage>(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);
+            }
+        }
+    }
+
+    return builder.finish();
+}
+
+void SkLights::flatten(SkWriteBuffer& buf) const {
+
+    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);
+        }
+
+        buf.writeImage(light.getShadowMap());
+    }
+}