[Shadows] Add an api to draw shadows around a surface. (1/n) (d87984df) · Commits · e / os / android_frameworks_base

core/java/android/view/SurfaceControl.java

+25 −0

Original line number	Diff line number	Diff line
		@@ -196,6 +196,8 @@ public final class SurfaceControl implements Parcelable {
		float brightness);
		private static native long nativeReadTransactionFromParcel(Parcel in);
		private static native void nativeWriteTransactionToParcel(long nativeObject, Parcel out);
		private static native void nativeSetShadowRadius(long transactionObj, long nativeObject,
		float shadowRadius);

		private final CloseGuard mCloseGuard = CloseGuard.get();
		private String mName;
		@@ -2545,6 +2547,29 @@ public final class SurfaceControl implements Parcelable {
		return this;
		}

		/**
		* Draws shadows of length {@code shadowRadius} around the surface {@link SurfaceControl}.
		* If the length is 0.0f then the shadows will not be drawn.
		*
		* Shadows are drawn around the screen bounds, these are the post transformed cropped
		* bounds. They can draw over their parent bounds and will be occluded by layers with a
		* higher z-order. The shadows will respect the surface's corner radius if the
		* rounded corner bounds (transformed source bounds) are within the screen bounds.
		*
		* A shadow will only be drawn on buffer and color layers. If the radius is applied on a
		* container layer, it will be passed down the hierarchy to be applied on buffer and color
		* layers but not its children. A scenario where this is useful is when SystemUI animates
		* a task by controlling a leash to it, can draw a shadow around the app surface by
		* setting a shadow on the leash. This is similar to how rounded corners are set.
		*
		* @hide
		*/
		public Transaction setShadowRadius(SurfaceControl sc, float shadowRadius) {
		sc.checkNotReleased();
		nativeSetShadowRadius(mNativeObject, sc.mNativeObject, shadowRadius);
		return this;
		}

		/**
		* Merge the other transaction into this transaction, clearing the
		* other transaction as if it had been applied.

core/jni/android_view_SurfaceControl.cpp

+10 −0

Original line number	Diff line number	Diff line
		@@ -545,6 +545,14 @@ static void nativeSetLayerStack(JNIEnv* env, jclass clazz, jlong transactionObj,
		transaction->setLayerStack(ctrl, layerStack);
		}

		static void nativeSetShadowRadius(JNIEnv* env, jclass clazz, jlong transactionObj,
		jlong nativeObject, jfloat shadowRadius) {
		auto transaction = reinterpret_cast<SurfaceComposerClient::Transaction*>(transactionObj);

		const auto ctrl = reinterpret_cast<SurfaceControl *>(nativeObject);
		transaction->setShadowRadius(ctrl, shadowRadius);
		}

		static jlongArray nativeGetPhysicalDisplayIds(JNIEnv* env, jclass clazz) {
		const auto displayIds = SurfaceComposerClient::getPhysicalDisplayIds();
		jlongArray array = env->NewLongArray(displayIds.size());
		@@ -1308,6 +1316,8 @@ static const JNINativeMethod sSurfaceControlMethods[] = {
		(void*)nativeSetCornerRadius },
		{"nativeSetLayerStack", "(JJI)V",
		(void*)nativeSetLayerStack },
		{"nativeSetShadowRadius", "(JJF)V",
		(void*)nativeSetShadowRadius },
		{"nativeGetPhysicalDisplayIds", "()[J",
		(void*)nativeGetPhysicalDisplayIds },
		{"nativeGetPhysicalDisplayToken", "(J)Landroid/os/IBinder;",