Split lighting out of SkiaPipeline

ReorderBarierDrawables includes SkiaPipeline just for the sake of
lighting, however SkiaPipeline brings much more unnecessary
dependencies. Splitting lighting our of SkiaPipeline should
make dependency resolution simpler.

Bug: 117921091
Test: all tests should pass
Change-Id: I6adf7c43555cfa3ff7090a1197fc11160d3a85ec

1 files changed, 86 insertions, 0 deletions

diff --git a/libs/hwui/LightingInfo.h b/libs/hwui/LightingInfo.h
new file mode 100644
index 000000000000..3112eb3e0d73
--- /dev/null
+++ b/libs/hwui/LightingInfo.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "Lighting.h"
+#include "Properties.h"
+
+namespace android {
+namespace uirenderer {
+
+class LightingInfo {
+public:
+
+    static float getLightRadius() {
+        if (CC_UNLIKELY(Properties::overrideLightRadius > 0)) {
+            return Properties::overrideLightRadius;
+        }
+        return mLightRadius;
+    }
+
+    static uint8_t getAmbientShadowAlpha() {
+        if (CC_UNLIKELY(Properties::overrideAmbientShadowStrength >= 0)) {
+            return Properties::overrideAmbientShadowStrength;
+        }
+        return mAmbientShadowAlpha;
+    }
+
+    static uint8_t getSpotShadowAlpha() {
+        if (CC_UNLIKELY(Properties::overrideSpotShadowStrength >= 0)) {
+            return Properties::overrideSpotShadowStrength;
+        }
+        return mSpotShadowAlpha;
+    }
+
+    static Vector3 getLightCenter() {
+        if (CC_UNLIKELY(Properties::overrideLightPosY > 0 || Properties::overrideLightPosZ > 0)) {
+            Vector3 adjustedLightCenter = mLightCenter;
+            if (CC_UNLIKELY(Properties::overrideLightPosY > 0)) {
+                // negated since this shifts up
+                adjustedLightCenter.y = -Properties::overrideLightPosY;
+            }
+            if (CC_UNLIKELY(Properties::overrideLightPosZ > 0)) {
+                adjustedLightCenter.z = Properties::overrideLightPosZ;
+            }
+            return adjustedLightCenter;
+        }
+        return mLightCenter;
+    }
+
+    static Vector3 getLightCenterRaw() {
+        return mLightCenter;
+    }
+
+    static void setLightCenterRaw(const Vector3& lightCenter) {
+        mLightCenter = lightCenter;
+    }
+
+    static void updateLighting(const LightGeometry& lightGeometry, const LightInfo& lightInfo) {
+        mLightRadius = lightGeometry.radius;
+        mAmbientShadowAlpha = lightInfo.ambientShadowAlpha;
+        mSpotShadowAlpha = lightInfo.spotShadowAlpha;
+        mLightCenter = lightGeometry.center;
+    }
+private:
+    static float mLightRadius;
+    static uint8_t mAmbientShadowAlpha;
+    static uint8_t mSpotShadowAlpha;
+    static Vector3 mLightCenter;
+};
+
+} /* namespace uirenderer */
+} /* namespace android */