commit 95f669a30a74fa519dc9dc760a099d977ebee567
author Sally Qi <sallyqi@google.com> Tue Aug 27 11:31:42 2024 -0700
committer Sally Qi <sallyqi@google.com> Thu Oct 03 22:14:32 2024 -0700
tree 515ab432d63d7c2177b1b4dc0c60427d8fdc3943
parent 9a4c026c402afc2f49856ca6d01f8c6d50a9a56f

[Lut HAL backend] implementation

- Add Lut in HWComposer::DeviceRequestedChanges
- parse lutProperties into overlayProperties
- Add a mapper <layer*, pfd> to store lut fd to avoid dup() ops if
  passing the fds into callees.
- SurfaceComposerClient::Transaction::setLuts interface

Bug: 329472100
Test: builds
Flag: NONE HAL backend interface change
Change-Id: Ib2993ce1eab66ab456388c0d15b032201eac7e91

services/surfaceflinger/CompositionEngine/src/Display.cpp

diff --git a/services/surfaceflinger/CompositionEngine/src/Display.cpp b/services/surfaceflinger/CompositionEngine/src/Display.cpp
index 77b1940..b0164b7 100644
--- a/services/surfaceflinger/CompositionEngine/src/Display.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Display.cpp
@@ -278,6 +278,7 @@
         applyDisplayRequests(changes->displayRequests);
         applyLayerRequestsToLayers(changes->layerRequests);
         applyClientTargetRequests(changes->clientTargetProperty);
+        applyLayerLutsToLayers(changes->layerLuts);
     }
 
     // Determine what type of composition we are doing from the final state
@@ -359,6 +360,25 @@
             static_cast<ui::PixelFormat>(clientTargetProperty.clientTargetProperty.pixelFormat));
 }
 
+void Display::applyLayerLutsToLayers(const LayerLuts& layerLuts) {
+    auto& mapper = getCompositionEngine().getHwComposer().getLutFileDescriptorMapper();
+    for (auto* layer : getOutputLayersOrderedByZ()) {
+        auto hwcLayer = layer->getHwcLayer();
+        if (!hwcLayer) {
+            continue;
+        }
+
+        if (auto lutsIt = layerLuts.find(hwcLayer); lutsIt != layerLuts.end()) {
+            if (auto mapperIt = mapper.find(hwcLayer); mapperIt != mapper.end()) {
+                layer->applyDeviceLayerLut(lutsIt->second,
+                                           ndk::ScopedFileDescriptor(mapperIt->second.release()));
+            }
+        }
+    }
+
+    mapper.clear();
+}
+
 void Display::executeCommands() {
     const auto halDisplayIdOpt = HalDisplayId::tryCast(mId);
     if (mIsDisconnected || !halDisplayIdOpt) {