SF: pass Color as float to HWC

In HWC3 Color is represented as a float [0.0 - 1.0] to be consistent
across the stack. SF passes the color as float and it gets translated
back to uint8_t for HWC2.

Bug: 207139550
Test: atest SurfaceFlinger_test
Change-Id: I83867eed70bd3baa3292c9cc099d891ba9cc6183
diff --git a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
index 545e2a2..e8fbe8e 100644
--- a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
@@ -551,10 +551,10 @@
 
 void OutputLayer::writeSolidColorStateToHWC(HWC2::Layer* hwcLayer,
                                             const LayerFECompositionState& outputIndependentState) {
-    hal::Color color = {static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.r)),
-                        static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.g)),
-                        static_cast<uint8_t>(std::round(255.0f * outputIndependentState.color.b)),
-                        255};
+    aidl::android::hardware::graphics::composer3::Color color = {outputIndependentState.color.r,
+                                                                 outputIndependentState.color.g,
+                                                                 outputIndependentState.color.b,
+                                                                 1.0f};
 
     if (auto error = hwcLayer->setColor(color); error != hal::Error::NONE) {
         ALOGE("[%s] Failed to set color: %s (%d)", getLayerFE().getDebugName(),
diff --git a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
index ff68053..6138313 100644
--- a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
+++ b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
@@ -58,7 +58,7 @@
                        const android::sp<android::Fence>&));
     MOCK_METHOD1(setSurfaceDamage, Error(const android::Region&));
     MOCK_METHOD1(setBlendMode, Error(hal::BlendMode));
-    MOCK_METHOD1(setColor, Error(hal::Color));
+    MOCK_METHOD1(setColor, Error(aidl::android::hardware::graphics::composer3::Color));
     MOCK_METHOD1(setCompositionType,
                  Error(aidl::android::hardware::graphics::composer3::Composition));
     MOCK_METHOD1(setDataspace, Error(android::ui::Dataspace));
diff --git a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
index ad7976f..f34b621 100644
--- a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
@@ -864,9 +864,8 @@
     }
 
     void expectSetColorCall() {
-        const hal::Color color = {static_cast<uint8_t>(std::round(kColor.r * 255)),
-                                  static_cast<uint8_t>(std::round(kColor.g * 255)),
-                                  static_cast<uint8_t>(std::round(kColor.b * 255)), 255};
+        const aidl::android::hardware::graphics::composer3::Color color = {kColor.r, kColor.g,
+                                                                           kColor.b, 1.0f};
 
         EXPECT_CALL(*mHwcLayer, setColor(ColorEq(color))).WillOnce(Return(kError));
     }