Add sticky transform to surfaceflinger.

Bug: 15116722

- Adds a sticky transform field that can be set from a
  SurfaceFlinger client Surface.  This transform is
  added to any transform applied to the Surface.

Change-Id: Idaa4311dfd027b2d2b8ea5e2c6cba2da5779d753

1 files changed, 9 insertions, 2 deletions

diff --git a/libs/gui/BufferQueueProducer.cpp b/libs/gui/BufferQueueProducer.cpp
index 70c3ff33e8..6feebf72cb 100644
--- a/libs/gui/BufferQueueProducer.cpp
+++ b/libs/gui/BufferQueueProducer.cpp
@@ -37,7 +37,8 @@ namespace android {
 BufferQueueProducer::BufferQueueProducer(const sp<BufferQueueCore>& core) :
     mCore(core),
     mSlots(core->mSlots),
-    mConsumerName() {}
+    mConsumerName(),
+    mStickyTransform(0) {}
 
 BufferQueueProducer::~BufferQueueProducer() {}
 
@@ -509,10 +510,11 @@ status_t BufferQueueProducer::queueBuffer(int slot,
     Rect crop;
     int scalingMode;
     uint32_t transform;
+    uint32_t stickyTransform;
     bool async;
     sp<Fence> fence;
     input.deflate(&timestamp, &isAutoTimestamp, &crop, &scalingMode, &transform,
-            &async, &fence);
+            &async, &fence, &stickyTransform);
 
     if (fence == NULL) {
         BQ_LOGE("queueBuffer: fence is NULL");
@@ -601,6 +603,8 @@ status_t BufferQueueProducer::queueBuffer(int slot,
         item.mFence = fence;
         item.mIsDroppable = mCore->mDequeueBufferCannotBlock || async;
 
+        mStickyTransform = stickyTransform;
+
         if (mCore->mQueue.empty()) {
             // When the queue is empty, we can ignore mDequeueBufferCannotBlock
             // and simply queue this buffer
@@ -701,6 +705,9 @@ int BufferQueueProducer::query(int what, int *outValue) {
         case NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS:
             value = mCore->getMinUndequeuedBufferCountLocked(false);
             break;
+        case NATIVE_WINDOW_STICKY_TRANSFORM:
+            value = static_cast<int>(mStickyTransform);
+            break;
         case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND:
             value = (mCore->mQueue.size() > 1);
             break;