Use NativeAllocationRegistry for ColorFilter

Bug: 62994689
Test: bit CtsGraphicsTestCases:*

Change-Id: Icea01fa7d4c6e78f3a93434de64bc8ddfe0c7a0e

core/jni/android/graphics/ColorFilter.cpp

@@ -30,9 +30,12 @@ using namespace uirenderer;
 
 class SkColorFilterGlue {
 public:
-    static void SafeUnref(JNIEnv* env, jobject clazz, jlong skFilterHandle) {
-        SkColorFilter* filter = reinterpret_cast<SkColorFilter *>(skFilterHandle);
-        SkSafeUnref(filter);
+    static void SafeUnref(SkShader* shader) {
+        SkSafeUnref(shader);
+    }
+
+    static jlong GetNativeFinalizer(JNIEnv*, jobject) {
+        return static_cast<jlong>(reinterpret_cast<uintptr_t>(&SafeUnref));
     }
 
     static jlong CreatePorterDuffFilter(JNIEnv* env, jobject, jint srcColor, jint modeHandle) {
@@ -57,7 +60,7 @@ public:
 };
 
 static const JNINativeMethod colorfilter_methods[] = {
-    {"nSafeUnref", "(J)V", (void*) SkColorFilterGlue::SafeUnref}
+    {"nativeGetFinalizer", "()J", (void*) SkColorFilterGlue::GetNativeFinalizer }
 };
 
 static const JNINativeMethod porterduff_methods[] = {

graphics/java/android/graphics/ColorFilter.java

@@ -14,19 +14,22 @@
  * limitations under the License.
  */
 
-// This file was generated from the C++ include file: SkColorFilter.h
-// Any changes made to this file will be discarded by the build.
-// To change this file, either edit the include, or device/tools/gluemaker/main.cpp, 
-// or one of the auxilary file specifications in device/tools/gluemaker.
-
 package android.graphics;
 
+import libcore.util.NativeAllocationRegistry;
+
 /**
  * A color filter can be used with a {@link Paint} to modify the color of
  * each pixel drawn with that paint. This is an abstract class that should
  * never be used directly.
  */
 public class ColorFilter {
+
+    private static class NoImagePreloadHolder {
+        public static final NativeAllocationRegistry sRegistry = new NativeAllocationRegistry(
+                ColorFilter.class.getClassLoader(), nativeGetFinalizer(), 50);
+    }
+
     /**
      * @deprecated Use subclass constructors directly instead.
      */
@@ -34,9 +37,11 @@ public class ColorFilter {
     public ColorFilter() {}
 
     /**
-     * Holds the pointer to the native SkColorFilter instance.
+     * Current native SkColorFilter instance.
      */
     private long mNativeInstance;
+    // Runnable to do immediate destruction
+    private Runnable mCleaner;
 
     long createNativeInstance() {
         return 0;
@@ -44,35 +49,28 @@ public class ColorFilter {
 
     void discardNativeInstance() {
         if (mNativeInstance != 0) {
-            nSafeUnref(mNativeInstance);
+            mCleaner.run();
+            mCleaner = null;
             mNativeInstance = 0;
         }
     }
 
-    @Override
-    protected void finalize() throws Throwable {
-        try {
-            if (mNativeInstance != 0) {
-                nSafeUnref(mNativeInstance);
-            }
-            mNativeInstance = -1;
-        } finally {
-            super.finalize();
-        }
-    }
-
     /** @hide */
     public long getNativeInstance() {
-        if (mNativeInstance == -1) {
-            throw new IllegalStateException("attempting to use a finalized ColorFilter");
-        }
-
         if (mNativeInstance == 0) {
             mNativeInstance = createNativeInstance();
+
+            if (mNativeInstance != 0) {
+                // Note: we must check for null here, since it's possible for createNativeInstance()
+                // to return nullptr if the native SkColorFilter would be a no-op at draw time.
+                // See native implementations of subclass create methods for more info.
+                mCleaner = NoImagePreloadHolder.sRegistry.registerNativeAllocation(
+                        this, mNativeInstance);
+            }
         }
         return mNativeInstance;
 
     }
 
-    static native void nSafeUnref(long native_instance);
+    private static native long nativeGetFinalizer();
 }