[Lut screenshot] backend implementation v2

Relnote: real implementation to call getLuts() binder in screenshot.
1. screenshot compositionengine doesn't have valid hwc composer object,
   we modify `setHwComposer` function to allow hwcomposer object to be
   used in multiple places. and set hwcomposer to screenshot
   compositionengine.
2. extend compositionengine::LayerFE::LayerSettings to include layer
   sequence number, and we use this unique value to identify which Luts
   should be used for which layer.

Bug: 352585077
Test: libcompositionengine_test; libsurfaceflinger_unittest
Flag: android.hardware.flags.luts_api

Change-Id: I4ef43bfd515541d23a8de8785f04e3a21c46b410

1 files changed, 3 insertions, 1 deletions

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index dd1119a5d1..1c185b1dd1 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -920,7 +920,8 @@ void SurfaceFlinger::init() FTL_FAKE_GUARD(kMainThreadContext) {
 
     mCompositionEngine->setTimeStats(mTimeStats);
 
-    mCompositionEngine->setHwComposer(getFactory().createHWComposer(mHwcServiceName));
+    mHWComposer = getFactory().createHWComposer(mHwcServiceName);
+    mCompositionEngine->setHwComposer(mHWComposer.get());
     auto& composer = mCompositionEngine->getHwComposer();
     composer.setCallback(*this);
     mDisplayModeController.setHwComposer(&composer);
@@ -7697,6 +7698,7 @@ ftl::SharedFuture<FenceResult> SurfaceFlinger::renderScreenImpl(
         std::unique_ptr<compositionengine::CompositionEngine> compositionEngine =
                 mFactory.createCompositionEngine();
         compositionEngine->setRenderEngine(mRenderEngine.get());
+        compositionEngine->setHwComposer(mHWComposer.get());
 
         std::vector<sp<compositionengine::LayerFE>> layerFEs;
         layerFEs.reserve(layers.size());