[Lut HAL backend] implementation 2nd patch

1. add gui/DisplayLuts.h structure. Mimic DisplayLuts.java.
2. add Lut parameter into Layer side. When SurfaceControl#setLuts is
   called, in native code, the lut information is passed to
   SurfaceFlinger and RenderEngine side via LayerState::eLutsChanged.
3. in OutputLayer::updateCompositionState, we compare the Lut
   requested from the app and the Lut from the HWC to decide GPU
   composition or not.
4. DPU or GPU composition? If the Lut from the app exactly matches the
   Lut from the hwc, do DPU. Otherwise, GPU composition instead.

Bug: 329472856
Test: libcompositionengine_test
Flag: NONE HAL backend interface change
Change-Id: I8295fe419c6237d90b7ff9f02f62bafd6cd2cecf

1 files changed, 6 insertions, 0 deletions

diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index 422c57bc87..4b531345b0 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -664,6 +664,10 @@ void layer_state_t::merge(const layer_state_t& other) {
         what |= eShadowRadiusChanged;
         shadowRadius = other.shadowRadius;
     }
+    if (other.what & eLutsChanged) {
+        what |= eLutsChanged;
+        luts = other.luts;
+    }
     if (other.what & eDefaultFrameRateCompatibilityChanged) {
         what |= eDefaultFrameRateCompatibilityChanged;
         defaultFrameRateCompatibility = other.defaultFrameRateCompatibility;
@@ -821,6 +825,8 @@ uint64_t layer_state_t::diff(const layer_state_t& other) const {
     CHECK_DIFF(diff, eColorSpaceAgnosticChanged, other, colorSpaceAgnostic);
     CHECK_DIFF(diff, eDimmingEnabledChanged, other, dimmingEnabled);
     if (other.what & eBufferReleaseChannelChanged) diff |= eBufferReleaseChannelChanged;
+    if (other.what & eLutsChanged) diff |= eLutsChanged;
+
     return diff;
 }