[SurfaceFlinger] Implement per layer color transformation.

Previously we introduced a new composer HAL API to set color transform for per
layer and added the plumbing in SurfaceFlinger. This patch implements the
functionality and alwasy mark those layers to fall back to GPU composition
until composer 2.3 is implemented.

BUG: 111562338
Test: Build, boot, flash, tested by setting a greyscale matrix on Settings
Test: adb shell /data/nativetest/SurfaceFlinger_test/SurfaceFlinger_test
Change-Id: If8d5ed52bf920d8cc962602196fb1b0b6e2955da

1 files changed, 9 insertions, 0 deletions

diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index 5a8d8dbc81..2b0a46181b 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -77,6 +77,9 @@ status_t layer_state_t::write(Parcel& output) const
         output.writeBool(false);
     }
 
+    memcpy(output.writeInplace(16 * sizeof(float)),
+           colorTransform.asArray(), 16 * sizeof(float));
+
     return NO_ERROR;
 }
 
@@ -130,6 +133,8 @@ status_t layer_state_t::read(const Parcel& input)
         sidebandStream = NativeHandle::create(input.readNativeHandle(), true);
     }
 
+    colorTransform = mat4(static_cast<const float*>(input.readInplace(16 * sizeof(float))));
+
     return NO_ERROR;
 }
 
@@ -314,6 +319,10 @@ void layer_state_t::merge(const layer_state_t& other) {
         what |= eSidebandStreamChanged;
         sidebandStream = other.sidebandStream;
     }
+    if (other.what & eColorTransformChanged) {
+        what |= eColorTransformChanged;
+        colorTransform = other.colorTransform;
+    }
 
     if ((other.what & what) != other.what) {
         ALOGE("Unmerged SurfaceComposer Transaction properties. LayerState::merge needs updating? "