Clean up duplicate shadow lengths in layer snapshot

The shadow length is currently tracked in both the LayerFE
CompositionState and the shadow settings, which are used by the
RenderEngine. We can consolidate these fields and track shadow
settings in the LayerFE CompositionState. This makes sense because
we want the LayerFE CompositionState to contain all relevant
information that it can pass to the RenderEngine without calling
back into the frontend.

Bug: 302551905
Test: presubmit

Change-Id: I583c43993cf73784c6fec9ec2d40f2c76d21adeb
diff --git a/services/surfaceflinger/FrontEnd/LayerSnapshot.cpp b/services/surfaceflinger/FrontEnd/LayerSnapshot.cpp
index f9c8e81..7a85da0 100644
--- a/services/surfaceflinger/FrontEnd/LayerSnapshot.cpp
+++ b/services/surfaceflinger/FrontEnd/LayerSnapshot.cpp
@@ -382,7 +382,6 @@
         sidebandStream = requested.sidebandStream;
     }
     if (forceUpdate || requested.what & layer_state_t::eShadowRadiusChanged) {
-        shadowRadius = requested.shadowRadius;
         shadowSettings.length = requested.shadowRadius;
     }
     if (forceUpdate || requested.what & layer_state_t::eFrameRateSelectionPriority) {
diff --git a/services/surfaceflinger/FrontEnd/LayerSnapshot.h b/services/surfaceflinger/FrontEnd/LayerSnapshot.h
index a1c72a9..80a51ea 100644
--- a/services/surfaceflinger/FrontEnd/LayerSnapshot.h
+++ b/services/surfaceflinger/FrontEnd/LayerSnapshot.h
@@ -69,7 +69,6 @@
     RoundedCornerState roundedCorner;
     FloatRect transformedBounds;
     Rect transformedBoundsWithoutTransparentRegion;
-    renderengine::ShadowSettings shadowSettings;
     bool premultipliedAlpha;
     ui::Transform parentTransform;
     Rect bufferSize;
diff --git a/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp b/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
index a1796e1..03c0993 100644
--- a/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
+++ b/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
@@ -353,7 +353,7 @@
     snapshot.isSecure = false;
     snapshot.color.a = 1.0_hf;
     snapshot.colorTransformIsIdentity = true;
-    snapshot.shadowRadius = 0.f;
+    snapshot.shadowSettings.length = 0.f;
     snapshot.layerMetadata.mMap.clear();
     snapshot.relativeLayerMetadata.mMap.clear();
     snapshot.inputInfo.touchOcclusionMode = gui::TouchOcclusionMode::BLOCK_UNTRUSTED;
@@ -990,9 +990,12 @@
 }
 
 void LayerSnapshotBuilder::updateShadows(LayerSnapshot& snapshot, const RequestedLayerState&,
-                                         const renderengine::ShadowSettings& globalShadowSettings) {
-    if (snapshot.shadowRadius > 0.f) {
-        snapshot.shadowSettings = globalShadowSettings;
+                                         const ShadowSettings& globalShadowSettings) {
+    if (snapshot.shadowSettings.length > 0.f) {
+        snapshot.shadowSettings.ambientColor = globalShadowSettings.ambientColor;
+        snapshot.shadowSettings.spotColor = globalShadowSettings.spotColor;
+        snapshot.shadowSettings.lightPos = globalShadowSettings.lightPos;
+        snapshot.shadowSettings.lightRadius = globalShadowSettings.lightRadius;
 
         // Note: this preserves existing behavior of shadowing the entire layer and not cropping
         // it if transparent regions are present. This may not be necessary since shadows are
@@ -1006,7 +1009,6 @@
         snapshot.shadowSettings.ambientColor *= snapshot.alpha;
         snapshot.shadowSettings.spotColor *= snapshot.alpha;
     }
-    snapshot.shadowSettings.length = snapshot.shadowRadius;
 }
 
 void LayerSnapshotBuilder::updateInput(LayerSnapshot& snapshot,
diff --git a/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.h b/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.h
index 3d64b36..1506913 100644
--- a/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.h
+++ b/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.h
@@ -47,7 +47,7 @@
         const DisplayInfos& displays;
         // Set to true if there were display changes since last update.
         bool displayChanges = false;
-        const renderengine::ShadowSettings& globalShadowSettings;
+        const ShadowSettings& globalShadowSettings;
         bool supportsBlur = true;
         bool forceFullDamage = false;
         std::optional<FloatRect> parentCrop = std::nullopt;
@@ -108,7 +108,7 @@
     void updateLayerBounds(LayerSnapshot& snapshot, const RequestedLayerState& layerState,
                            const LayerSnapshot& parentSnapshot, uint32_t displayRotationFlags);
     static void updateShadows(LayerSnapshot& snapshot, const RequestedLayerState& requested,
-                              const renderengine::ShadowSettings& globalShadowSettings);
+                              const ShadowSettings& globalShadowSettings);
     void updateInput(LayerSnapshot& snapshot, const RequestedLayerState& requested,
                      const LayerSnapshot& parentSnapshot, const LayerHierarchy::TraversalPath& path,
                      const Args& args);