Merge "add a (hidden) api on Surface to query if the consumer is running behind the producer" (80193e77) · Commits · e / os / android_frameworks_base

core/java/android/view/Surface.java

+9 −0

Original line number	Diff line number	Diff line
		@@ -323,6 +323,15 @@ public class Surface implements Parcelable {
		return mSurfaceGenerationId;
		}


		/**
		* Whether the consumer of this Surface is running behind the producer;
		* that is, isConsumerRunningBehind() returns true if the consumer is more
		* than one buffer ahead of the producer.
		* @hide
		*/
		public native boolean isConsumerRunningBehind();

		/**
		* A Canvas class that can handle the compatibility mode. This does two
		* things differently.

+14 −0

Original line number	Diff line number	Diff line
		@@ -316,6 +316,19 @@ static jboolean Surface_isValid(JNIEnv* env, jobject clazz)
		return Surface::isValid(surface) ? JNI_TRUE : JNI_FALSE;
		}

		static jboolean Surface_isConsumerRunningBehind(JNIEnv* env, jobject clazz)
		{
		int value = 0;
		const sp<Surface>& surface(getSurface(env, clazz));
		if (!Surface::isValid(surface)) {
		doThrowIAE(env);
		return 0;
		}
		ANativeWindow* anw = static_cast<ANativeWindow *>(surface.get());
		anw->query(anw, NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND, &value);
		return (jboolean)value;
		}

		static inline SkBitmap::Config convertPixelFormat(PixelFormat format)
		{
		/* note: if PIXEL_FORMAT_RGBX_8888 means that all alpha bytes are 0xFF, then
		@@ -875,6 +888,7 @@ static JNINativeMethod gSurfaceMethods[] = {
		{"setFreezeTint", "(I)V", (void*)Surface_setFreezeTint },
		{"readFromParcel", "(Landroid/os/Parcel;)V", (void*)Surface_readFromParcel },
		{"writeToParcel", "(Landroid/os/Parcel;I)V", (void*)Surface_writeToParcel },
		{"isConsumerRunningBehind", "()Z", (void*)Surface_isConsumerRunningBehind },
		};

		void nativeClassInit(JNIEnv* env, jclass clazz)