Maintain the active buffer when clearing buffer slots
When an app discards graphic buffers, for example when a MediaCodec
disconnects from a surface, those buffers will be uncached and removed
from HWC buffer slots. The active buffer, however, should still remain
active until the next buffer is queued up.
Bug: 262037933
Bug: 258196272
Test: atest OutputLayerUncacheBufferTest
Test: atest VtsHalGraphicsComposer3_TargetTest
Test: atest VtsHalGraphicsComposerV2_2TargetTest
Change-Id: I7c4eefb17e8bad694d698f9ad6d1d289f4af8d2c
diff --git a/services/surfaceflinger/CompositionEngine/tests/HwcBufferCacheTest.cpp b/services/surfaceflinger/CompositionEngine/tests/HwcBufferCacheTest.cpp
index cf72e8f..c5fb594 100644
--- a/services/surfaceflinger/CompositionEngine/tests/HwcBufferCacheTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/HwcBufferCacheTest.cpp
@@ -115,20 +115,20 @@
EXPECT_EQ(cache.uncache(mBuffer2->getId()), UINT32_MAX);
}
-TEST_F(HwcBufferCacheTest, getHwcSlotAndBufferForOverride_whenCached_returnsSameSlotAndNullBuffer) {
+TEST_F(HwcBufferCacheTest, getOverrideHwcSlotAndBuffer_whenCached_returnsSameSlotAndNullBuffer) {
HwcBufferCache cache;
sp<GraphicBuffer> outBuffer;
- HwcSlotAndBuffer originalSlotAndBuffer = cache.getHwcSlotAndBufferForOverride(mBuffer1);
+ HwcSlotAndBuffer originalSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(mBuffer1);
EXPECT_NE(originalSlotAndBuffer.slot, UINT32_MAX);
EXPECT_EQ(originalSlotAndBuffer.buffer, mBuffer1);
- HwcSlotAndBuffer finalSlotAndBuffer = cache.getHwcSlotAndBufferForOverride(mBuffer1);
+ HwcSlotAndBuffer finalSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(mBuffer1);
EXPECT_EQ(finalSlotAndBuffer.slot, originalSlotAndBuffer.slot);
EXPECT_EQ(finalSlotAndBuffer.buffer, nullptr);
}
-TEST_F(HwcBufferCacheTest, getHwcSlotAndBufferForOverride_whenSlotsFull_returnsIndependentSlot) {
+TEST_F(HwcBufferCacheTest, getOverrideHwcSlotAndBuffer_whenSlotsFull_returnsIndependentSlot) {
HwcBufferCache cache;
sp<GraphicBuffer> outBuffer;
@@ -149,7 +149,7 @@
sp<GraphicBuffer> overrideBuffer =
sp<GraphicBuffer>::make(1u, 1u, HAL_PIXEL_FORMAT_RGBA_8888, 1u, 0u);
- HwcSlotAndBuffer overrideSlotAndBuffer = cache.getHwcSlotAndBufferForOverride(overrideBuffer);
+ HwcSlotAndBuffer overrideSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(overrideBuffer);
// expect us to have a slot number
EXPECT_NE(overrideSlotAndBuffer.slot, UINT32_MAX);
// expect this to be the first time we cached the buffer
@@ -173,7 +173,7 @@
HwcBufferCache cache;
sp<GraphicBuffer> outBuffer;
- HwcSlotAndBuffer hwcSlotAndBuffer = cache.getHwcSlotAndBufferForOverride(mBuffer1);
+ HwcSlotAndBuffer hwcSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(mBuffer1);
ASSERT_NE(hwcSlotAndBuffer.slot, UINT32_MAX);
EXPECT_EQ(cache.uncache(mBuffer1->getId()), hwcSlotAndBuffer.slot);
@@ -184,7 +184,7 @@
HwcBufferCache cache;
sp<GraphicBuffer> outBuffer;
- HwcSlotAndBuffer hwcSlotAndBuffer = cache.getHwcSlotAndBufferForOverride(mBuffer1);
+ HwcSlotAndBuffer hwcSlotAndBuffer = cache.getOverrideHwcSlotAndBuffer(mBuffer1);
ASSERT_NE(hwcSlotAndBuffer.slot, UINT32_MAX);
EXPECT_EQ(cache.uncache(mBuffer2->getId()), UINT32_MAX);
diff --git a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
index c7f9c69..b0b1a02 100644
--- a/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
+++ b/services/surfaceflinger/CompositionEngine/tests/MockHWC2.h
@@ -56,7 +56,7 @@
MOCK_METHOD3(setBuffer,
Error(uint32_t, const android::sp<android::GraphicBuffer>&,
const android::sp<android::Fence>&));
- MOCK_METHOD1(clearBufferSlot, Error(uint32_t));
+ MOCK_METHOD2(setBufferSlotsToClear, Error(const std::vector<uint32_t>&, uint32_t));
MOCK_METHOD1(setSurfaceDamage, Error(const android::Region&));
MOCK_METHOD1(setBlendMode, Error(hal::BlendMode));
MOCK_METHOD1(setColor, Error(aidl::android::hardware::graphics::composer3::Color));
diff --git a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
index f2128c9..0edc226 100644
--- a/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/OutputLayerTest.cpp
@@ -1361,19 +1361,21 @@
Mock::VerifyAndClearExpectations(&mHwcLayer);
// buffer slots are cleared in HWC
- EXPECT_CALL(mHwcLayer, clearBufferSlot(/*slot*/ 0));
- EXPECT_CALL(mHwcLayer, clearBufferSlot(/*slot*/ 1));
+ std::vector<uint32_t> slotsToClear = {0, 1};
+ EXPECT_CALL(mHwcLayer,
+ setBufferSlotsToClear(/*slotsToClear*/ slotsToClear, /*activeBufferSlot*/ 1));
mOutputLayer.uncacheBuffers({kBuffer1->getId(), kBuffer2->getId()});
Mock::VerifyAndClearExpectations(&mHwcLayer);
- // slot 1 is reused for Buffer1
+ // rather than allocating a new slot, the active buffer slot (slot 1) is reused first to free
+ // the memory as soon as possible
mLayerFEState.buffer = kBuffer1;
EXPECT_CALL(mHwcLayer, setBuffer(/*slot*/ 1, kBuffer1, kFence));
mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,
/*zIsOverridden*/ false, /*isPeekingThrough*/ false);
Mock::VerifyAndClearExpectations(&mHwcLayer);
- // slot 0 is reused for Buffer2
+ // rather than allocating a new slot, slot 0 is reused
mLayerFEState.buffer = kBuffer2;
EXPECT_CALL(mHwcLayer, setBuffer(/*slot*/ 0, kBuffer2, kFence));
mOutputLayer.writeStateToHWC(/*includeGeometry*/ false, /*skipLayer*/ false, 0,