Add support for background blurs

Bug: 141640413
Fixes: 146384234
Test: adb shell setprop debug.sf.disableBlurs 1
Test: adb shell setprop debug.sf.gaussianBlur 0
Test: adb shell setprop ro.surface_flinger.supports_background_blur 1
Test: ./SurfaceFlinger_test --gtest_filter=Layer*Tests/Layer*Test.SetBackgroundBlur*
Test: ./librenderengine_test --gtest_filter=*BlurBackground*"
Test: atest SurfaceFlinger_test:SurfaceInterceptorTest#InterceptBackgroundBlurRadiusUpdateWorks
Change-Id: I5194c910fe7062f33e70943867012539e6c6626a
diff --git a/services/surfaceflinger/layerproto/LayerProtoParser.cpp b/services/surfaceflinger/layerproto/LayerProtoParser.cpp
index ef27847..8fce0c9 100644
--- a/services/surfaceflinger/layerproto/LayerProtoParser.cpp
+++ b/services/surfaceflinger/layerproto/LayerProtoParser.cpp
@@ -106,6 +106,7 @@
     layer.refreshPending = layerProto.refresh_pending();
     layer.isProtected = layerProto.is_protected();
     layer.cornerRadius = layerProto.corner_radius();
+    layer.backgroundBlurRadius = layerProto.background_blur_radius();
     for (const auto& entry : layerProto.metadata()) {
         const std::string& dataStr = entry.second;
         std::vector<uint8_t>& outData = layer.metadata.mMap[entry.first];
@@ -290,6 +291,7 @@
     StringAppendF(&result, "isOpaque=%1d, invalidate=%1d, ", isOpaque, invalidate);
     StringAppendF(&result, "dataspace=%s, ", dataspace.c_str());
     StringAppendF(&result, "defaultPixelFormat=%s, ", pixelFormat.c_str());
+    StringAppendF(&result, "backgroundBlurRadius=%1d, ", backgroundBlurRadius);
     StringAppendF(&result, "color=(%.3f,%.3f,%.3f,%.3f), flags=0x%08x, ",
                   static_cast<double>(color.r), static_cast<double>(color.g),
                   static_cast<double>(color.b), static_cast<double>(color.a), flags);
diff --git a/services/surfaceflinger/layerproto/include/layerproto/LayerProtoParser.h b/services/surfaceflinger/layerproto/include/layerproto/LayerProtoParser.h
index 774b0e1..52b9165 100644
--- a/services/surfaceflinger/layerproto/include/layerproto/LayerProtoParser.h
+++ b/services/surfaceflinger/layerproto/include/layerproto/LayerProtoParser.h
@@ -110,6 +110,7 @@
         bool refreshPending;
         bool isProtected;
         float cornerRadius;
+        int backgroundBlurRadius;
         LayerMetadata metadata;
         LayerProtoParser::FloatRect cornerRadiusCrop;
         float shadowRadius;
diff --git a/services/surfaceflinger/layerproto/layers.proto b/services/surfaceflinger/layerproto/layers.proto
index 41ecafa..8afe503 100644
--- a/services/surfaceflinger/layerproto/layers.proto
+++ b/services/surfaceflinger/layerproto/layers.proto
@@ -104,6 +104,8 @@
   ColorTransformProto color_transform = 50;
 
   bool is_relative_of = 51;
+  // Layer's background blur radius in pixels.
+  int32 background_blur_radius = 52;
 }
 
 message PositionProto {