Add interface for controlling single buffer auto refresh
- Adds a boolean to BufferQueue that controls whether or not auto
refresh is enabled in SurfaceFlinger when in single buffer mode.
- Adds plumbing up to ANativeWindow.
- When enabled, it will cache the shared buffer slot in Surface in
order to prevent the Binder transaction with SurfaceFlinger.
Bug 24940410
Change-Id: I83142afdc00e203f198a32288f071d926f8fda95
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index d39075f..6574898 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -88,7 +88,7 @@
mQueueItems(),
mLastFrameNumberReceived(0),
mUpdateTexImageFailed(false),
- mSingleBufferMode(false)
+ mAutoRefresh(false)
{
mCurrentCrop.makeInvalid();
mFlinger->getRenderEngine().genTextures(1, &mTextureName);
@@ -1260,7 +1260,7 @@
// ----------------------------------------------------------------------------
bool Layer::shouldPresentNow(const DispSync& dispSync) const {
- if (mSidebandStreamChanged || mSingleBufferMode) {
+ if (mSidebandStreamChanged || mAutoRefresh) {
return true;
}
@@ -1284,7 +1284,7 @@
bool Layer::onPreComposition() {
mRefreshPending = false;
- return mQueuedFrames > 0 || mSidebandStreamChanged || mSingleBufferMode;
+ return mQueuedFrames > 0 || mSidebandStreamChanged || mAutoRefresh;
}
void Layer::onPostComposition() {
@@ -1341,7 +1341,7 @@
}
Region outDirtyRegion;
- if (mQueuedFrames > 0 || mSingleBufferMode) {
+ if (mQueuedFrames > 0 || mAutoRefresh) {
// if we've already called updateTexImage() without going through
// a composition step, we have to skip this layer at this point
@@ -1507,7 +1507,7 @@
// buffer mode.
bool queuedBuffer = false;
status_t updateResult = mSurfaceFlingerConsumer->updateTexImage(&r,
- mFlinger->mPrimaryDispSync, &mSingleBufferMode, &queuedBuffer,
+ mFlinger->mPrimaryDispSync, &mAutoRefresh, &queuedBuffer,
mLastFrameNumberReceived);
if (updateResult == BufferQueue::PRESENT_LATER) {
// Producer doesn't want buffer to be displayed yet. Signal a
@@ -1563,7 +1563,7 @@
// Decrement the queued-frames count. Signal another event if we
// have more frames pending.
if ((queuedBuffer && android_atomic_dec(&mQueuedFrames) > 1)
- || mSingleBufferMode) {
+ || mAutoRefresh) {
mFlinger->signalLayerUpdate();
}