BBQSurface: Give client a chance to observe transform hint earlier
The client may be observing the transform hint through the Surface.cpp
codepath however Surface#mTransformHint will only be updated on
queueBuffer. However imagine a scenario like this:
1. transform hint changes on server
2. queue buffer
2. repeat queue buffer
3. callback for queue buffer 1 and 2, updates transform hint on
client
4. queue buffer 4
5. Client now observes transform hint
6. Queue buffer 5(!) will finally contain the transform hint.
With this change we give the client a chance to observe the tranform
hint in this scenario before queue buffer 4. In the case of the
ScreenDecorOverlay's which rarely redraw, this seems to fix some
persistent pre-rotation issues.
Bug: 184842607
Test: Existing tests pass.
Change-Id: I34524ee40c6076f497bb0c60af901e9c93798a48
diff --git a/libs/gui/BLASTBufferQueue.cpp b/libs/gui/BLASTBufferQueue.cpp
index 3d854c2..a023067 100644
--- a/libs/gui/BLASTBufferQueue.cpp
+++ b/libs/gui/BLASTBufferQueue.cpp
@@ -316,6 +316,11 @@
std::unique_lock _lock{mMutex};
BQA_LOGV("releaseBufferCallback graphicBufferId=%" PRIu64, graphicBufferId);
+ if (mSurfaceControl != nullptr) {
+ mTransformHint = mSurfaceControl->getTransformHint();
+ mBufferItemConsumer->setTransformHint(mTransformHint);
+ }
+
auto it = mSubmitted.find(graphicBufferId);
if (it == mSubmitted.end()) {
BQA_LOGE("ERROR: releaseBufferCallback without corresponding submitted buffer %" PRIu64,
@@ -608,6 +613,14 @@
status_t setFrameTimelineInfo(const FrameTimelineInfo& frameTimelineInfo) override {
return mBbq->setFrameTimelineInfo(frameTimelineInfo);
}
+ protected:
+ uint32_t getTransformHint() const override {
+ if (mStickyTransform == 0 && !transformToDisplayInverse()) {
+ return mBbq->getLastTransformHint();
+ } else {
+ return 0;
+ }
+ }
};
// TODO: Can we coalesce this with frame updates? Need to confirm
@@ -777,4 +790,12 @@
return convertedFormat;
}
+uint32_t BLASTBufferQueue::getLastTransformHint() const {
+ if (mSurfaceControl != nullptr) {
+ return mSurfaceControl->getTransformHint();
+ } else {
+ return 0;
+ }
+}
+
} // namespace android
diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index 2fc9d47..83aaf36 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -1288,7 +1288,7 @@
mUserHeight ? mUserHeight : mDefaultHeight);
return NO_ERROR;
case NATIVE_WINDOW_TRANSFORM_HINT:
- *value = static_cast<int>(mTransformHint);
+ *value = static_cast<int>(getTransformHint());
return NO_ERROR;
case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND: {
status_t err = NO_ERROR;
@@ -1822,7 +1822,7 @@
return getExtraBufferCount(extraBuffers);
}
-bool Surface::transformToDisplayInverse() {
+bool Surface::transformToDisplayInverse() const {
return (mTransform & NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY) ==
NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY;
}
diff --git a/libs/gui/include/gui/BLASTBufferQueue.h b/libs/gui/include/gui/BLASTBufferQueue.h
index 139dbb7..c4ca399 100644
--- a/libs/gui/include/gui/BLASTBufferQueue.h
+++ b/libs/gui/include/gui/BLASTBufferQueue.h
@@ -103,6 +103,8 @@
void setSidebandStream(const sp<NativeHandle>& stream);
+ uint32_t getLastTransformHint() const;
+
virtual ~BLASTBufferQueue();
private:
diff --git a/libs/gui/include/gui/Surface.h b/libs/gui/include/gui/Surface.h
index d22bdaa..89e1909 100644
--- a/libs/gui/include/gui/Surface.h
+++ b/libs/gui/include/gui/Surface.h
@@ -278,7 +278,6 @@
int dispatchGetLastQueuedBuffer(va_list args);
int dispatchSetFrameTimelineInfo(va_list args);
int dispatchGetExtraBufferCount(va_list args);
- bool transformToDisplayInverse();
protected:
virtual int dequeueBuffer(ANativeWindowBuffer** buffer, int* fenceFd);
@@ -490,6 +489,8 @@
// mTransformHint is the transform probably applied to buffers of this
// window. this is only a hint, actual transform may differ.
uint32_t mTransformHint;
+ virtual uint32_t getTransformHint() const { return mTransformHint; }
+ bool transformToDisplayInverse() const;
// mProducerControlledByApp whether this buffer producer is controlled
// by the application