add a way to query whether an ANativeWindow consumer is running ahead of the producer
Change-Id: Ibccfa1feb56db2ab11f0c0934ce2d570a2b65ae2
diff --git a/include/gui/ISurfaceTexture.h b/include/gui/ISurfaceTexture.h
index 929eda2..1e33764 100644
--- a/include/gui/ISurfaceTexture.h
+++ b/include/gui/ISurfaceTexture.h
@@ -107,21 +107,26 @@
struct QueueBufferOutput {
inline QueueBufferOutput() { }
inline void deflate(uint32_t* outWidth,
- uint32_t* outHeight, uint32_t* outTransformHint) const {
+ uint32_t* outHeight,
+ uint32_t* outTransformHint,
+ uint32_t* outNumPendingBuffers) const {
*outWidth = width;
*outHeight = height;
*outTransformHint = transformHint;
+ *outNumPendingBuffers = numPendingBuffers;
}
inline void inflate(uint32_t inWidth, uint32_t inHeight,
- uint32_t inTransformHint) {
+ uint32_t inTransformHint, uint32_t inNumPendingBuffers) {
width = inWidth;
height = inHeight;
transformHint = inTransformHint;
+ numPendingBuffers = inNumPendingBuffers;
}
private:
uint32_t width;
uint32_t height;
uint32_t transformHint;
+ uint32_t numPendingBuffers;
};
virtual status_t queueBuffer(int slot,
diff --git a/include/gui/SurfaceTextureClient.h b/include/gui/SurfaceTextureClient.h
index 6644751..7fd9be5 100644
--- a/include/gui/SurfaceTextureClient.h
+++ b/include/gui/SurfaceTextureClient.h
@@ -187,6 +187,10 @@
// window. this is only a hint, actual transform may differ.
uint32_t mTransformHint;
+ // mConsumerRunningBehind whether the consumer is running more than
+ // one buffer behind the producer.
+ mutable bool mConsumerRunningBehind;
+
// mMutex is the mutex used to prevent concurrent access to the member
// variables of SurfaceTexture objects. It must be locked whenever the
// member variables are accessed.