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-rw-r--r--services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp19
-rw-r--r--services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp17
2 files changed, 26 insertions, 10 deletions
diff --git a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
index 3e983f3b20..723593d7ac 100644
--- a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
@@ -325,7 +325,8 @@ void OutputLayer::updateCompositionState(
// For hdr content, treat the white point as the display brightness - HDR content should not be
// boosted or dimmed.
if (isHdrDataspace(state.dataspace) ||
- getOutput().getState().displayBrightnessNits == getOutput().getState().sdrWhitePointNits) {
+ getOutput().getState().displayBrightnessNits == getOutput().getState().sdrWhitePointNits ||
+ getOutput().getState().displayBrightnessNits == 0.f) {
state.dimmingRatio = 1.f;
state.whitePointNits = getOutput().getState().displayBrightnessNits;
} else {
@@ -506,9 +507,18 @@ void OutputLayer::writeOutputDependentPerFrameStateToHWC(HWC2::Layer* hwcLayer)
to_string(error).c_str(), static_cast<int32_t>(error));
}
- // Don't dim cached layers
- const auto dimmingRatio =
- outputDependentState.overrideInfo.buffer ? 1.f : outputDependentState.dimmingRatio;
+ // Cached layers are not dimmed, which means that composer should attempt to dim.
+ // Note that if the dimming ratio is large, then this may cause the cached layer
+ // to kick back into GPU composition :(
+ // Also note that this assumes that there are no HDR layers that are able to be cached.
+ // Otherwise, this could cause HDR layers to be dimmed twice.
+ const auto dimmingRatio = outputDependentState.overrideInfo.buffer
+ ? (getOutput().getState().displayBrightnessNits != 0.f
+ ? std::clamp(getOutput().getState().sdrWhitePointNits /
+ getOutput().getState().displayBrightnessNits,
+ 0.f, 1.f)
+ : 1.f)
+ : outputDependentState.dimmingRatio;
if (auto error = hwcLayer->setBrightness(dimmingRatio); error != hal::Error::NONE) {
ALOGE("[%s] Failed to set brightness %f: %s (%d)", getLayerFE().getDebugName(),
@@ -788,6 +798,7 @@ std::vector<LayerFE::LayerSettings> OutputLayer::getOverrideCompositionList() co
}};
settings.sourceDataspace = getState().overrideInfo.dataspace;
settings.alpha = 1.0f;
+ settings.whitePointNits = getOutput().getState().sdrWhitePointNits;
return {static_cast<LayerFE::LayerSettings>(settings)};
}
diff --git a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
index dda0822b1f..8eb1946b67 100644
--- a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
@@ -657,7 +657,7 @@ TEST_F(OutputLayerUpdateCompositionStateTest, setsOutputLayerColorspaceCorrectly
EXPECT_EQ(ui::Dataspace::V0_SCRGB, mOutputLayer.getState().dataspace);
}
-TEST_F(OutputLayerUpdateCompositionStateTest, setsWhitePointNitsCorrectly) {
+TEST_F(OutputLayerUpdateCompositionStateTest, setsWhitePointNitsAndDimmingRatioCorrectly) {
mOutputState.sdrWhitePointNits = 200.f;
mOutputState.displayBrightnessNits = 800.f;
@@ -665,12 +665,15 @@ TEST_F(OutputLayerUpdateCompositionStateTest, setsWhitePointNitsCorrectly) {
mLayerFEState.isColorspaceAgnostic = false;
mOutputLayer.updateCompositionState(false, false, ui::Transform::RotationFlags::ROT_0);
EXPECT_EQ(mOutputState.sdrWhitePointNits, mOutputLayer.getState().whitePointNits);
+ EXPECT_EQ(mOutputState.sdrWhitePointNits / mOutputState.displayBrightnessNits,
+ mOutputLayer.getState().dimmingRatio);
mLayerFEState.dataspace = ui::Dataspace::BT2020_ITU_PQ;
mLayerFEState.isColorspaceAgnostic = false;
mOutputLayer.updateCompositionState(false, false, ui::Transform::RotationFlags::ROT_0);
EXPECT_EQ(mOutputState.displayBrightnessNits, mOutputLayer.getState().whitePointNits);
+ EXPECT_EQ(1.f, mOutputLayer.getState().dimmingRatio);
}
TEST_F(OutputLayerUpdateCompositionStateTest, doesNotRecomputeGeometryIfNotRequested) {
@@ -750,9 +753,10 @@ struct OutputLayerWriteStateToHWCTest : public OutputLayerTest {
static constexpr bool kLayerGenericMetadata1Mandatory = true;
static constexpr bool kLayerGenericMetadata2Mandatory = true;
static constexpr float kWhitePointNits = 200.f;
+ static constexpr float kSdrWhitePointNits = 100.f;
static constexpr float kDisplayBrightnessNits = 400.f;
static constexpr float kLayerBrightness = kWhitePointNits / kDisplayBrightnessNits;
- static constexpr float kFullLayerBrightness = 1.f;
+ static constexpr float kOverrideLayerBrightness = kSdrWhitePointNits / kDisplayBrightnessNits;
static const half4 kColor;
static const Rect kDisplayFrame;
@@ -798,6 +802,7 @@ struct OutputLayerWriteStateToHWCTest : public OutputLayerTest {
mLayerFEState.acquireFence = kFence;
mOutputState.displayBrightnessNits = kDisplayBrightnessNits;
+ mOutputState.sdrWhitePointNits = kSdrWhitePointNits;
EXPECT_CALL(mOutput, getDisplayColorProfile())
.WillRepeatedly(Return(&mDisplayColorProfile));
@@ -1117,7 +1122,7 @@ TEST_F(OutputLayerWriteStateToHWCTest, overriddenSkipLayerDoesNotSendBuffer) {
expectGeometryCommonCalls(kOverrideDisplayFrame, kOverrideSourceCrop, kOverrideBufferTransform,
kOverrideBlendMode, kSkipAlpha);
expectPerFrameCommonCalls(SimulateUnsupported::None, kOverrideDataspace, kOverrideVisibleRegion,
- kOverrideSurfaceDamage, kFullLayerBrightness);
+ kOverrideSurfaceDamage, kOverrideLayerBrightness);
expectSetHdrMetadataAndBufferCalls();
expectSetCompositionTypeCall(Composition::DEVICE);
EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
@@ -1133,7 +1138,7 @@ TEST_F(OutputLayerWriteStateToHWCTest, overriddenSkipLayerForSolidColorDoesNotSe
expectGeometryCommonCalls(kOverrideDisplayFrame, kOverrideSourceCrop, kOverrideBufferTransform,
kOverrideBlendMode, kSkipAlpha);
expectPerFrameCommonCalls(SimulateUnsupported::None, kOverrideDataspace, kOverrideVisibleRegion,
- kOverrideSurfaceDamage, kFullLayerBrightness);
+ kOverrideSurfaceDamage, kOverrideLayerBrightness);
expectSetHdrMetadataAndBufferCalls();
expectSetCompositionTypeCall(Composition::DEVICE);
EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
@@ -1149,7 +1154,7 @@ TEST_F(OutputLayerWriteStateToHWCTest, includesOverrideInfoIfPresent) {
expectGeometryCommonCalls(kOverrideDisplayFrame, kOverrideSourceCrop, kOverrideBufferTransform,
kOverrideBlendMode, kOverrideAlpha);
expectPerFrameCommonCalls(SimulateUnsupported::None, kOverrideDataspace, kOverrideVisibleRegion,
- kOverrideSurfaceDamage, kFullLayerBrightness);
+ kOverrideSurfaceDamage, kOverrideLayerBrightness);
expectSetHdrMetadataAndBufferCalls(kOverrideHwcSlot, kOverrideBuffer, kOverrideFence);
expectSetCompositionTypeCall(Composition::DEVICE);
EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
@@ -1165,7 +1170,7 @@ TEST_F(OutputLayerWriteStateToHWCTest, includesOverrideInfoForSolidColorIfPresen
expectGeometryCommonCalls(kOverrideDisplayFrame, kOverrideSourceCrop, kOverrideBufferTransform,
kOverrideBlendMode, kOverrideAlpha);
expectPerFrameCommonCalls(SimulateUnsupported::None, kOverrideDataspace, kOverrideVisibleRegion,
- kOverrideSurfaceDamage, kFullLayerBrightness);
+ kOverrideSurfaceDamage, kOverrideLayerBrightness);
expectSetHdrMetadataAndBufferCalls(kOverrideHwcSlot, kOverrideBuffer, kOverrideFence);
expectSetCompositionTypeCall(Composition::DEVICE);
EXPECT_CALL(*mLayerFE, hasRoundedCorners()).WillRepeatedly(Return(false));
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-08 13:35:53 +0000