update external headers

ios/include/common/CallbackUtils.h

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <jni.h>
+
+#include "common/NioUtils.h"
+
+#include <backend/CallbackHandler.h>
+
+#include <filament/Engine.h>
+
+struct CallbackJni {
+#ifdef __ANDROID__
+    jclass handlerClass = nullptr;
+    jmethodID post = nullptr;
+#endif
+    jclass executorClass = nullptr;
+    jmethodID execute = nullptr;
+};
+
+void acquireCallbackJni(JNIEnv* env, CallbackJni& callbackUtils);
+void releaseCallbackJni(JNIEnv* env, CallbackJni callbackUtils, jobject handler, jobject callback);
+
+struct JniCallback : private filament::backend::CallbackHandler {
+    JniCallback(JniCallback const &) = delete;
+    JniCallback(JniCallback&&) = delete;
+    JniCallback& operator=(JniCallback const &) = delete;
+    JniCallback& operator=(JniCallback&&) = delete;
+
+    // create a JniCallback
+    static JniCallback* make(JNIEnv* env, jobject handler, jobject runnable);
+
+    // execute the callback on the java thread and destroy ourselves
+    static void postToJavaAndDestroy(JniCallback* callback);
+
+    // CallbackHandler interface.
+    void post(void* user, Callback callback) override;
+
+    // Get the CallbackHandler interface
+    filament::backend::CallbackHandler* getHandler() noexcept { return this; }
+
+    jobject getCallbackObject() { return mCallback; }
+
+protected:
+    JniCallback(JNIEnv* env, jobject handler, jobject runnable);
+    explicit JniCallback() = default; // this version does nothing
+    virtual ~JniCallback();
+    jobject mHandler{};
+    jobject mCallback{};
+    CallbackJni mCallbackUtils{};
+};
+
+
+struct JniBufferCallback : public JniCallback {
+    // create a JniBufferCallback
+    static JniBufferCallback* make(filament::Engine* engine,
+            JNIEnv* env, jobject handler, jobject callback, AutoBuffer&& buffer);
+
+    // execute the callback on the java thread and destroy ourselves
+    static void postToJavaAndDestroy(void*, size_t, void* user);
+
+private:
+    JniBufferCallback(JNIEnv* env, jobject handler, jobject callback, AutoBuffer&& buffer);
+    virtual ~JniBufferCallback();
+    AutoBuffer mBuffer;
+};
+
+struct JniImageCallback : public JniCallback {
+    // create a JniImageCallback
+    static JniImageCallback* make(filament::Engine* engine, JNIEnv* env, jobject handler,
+            jobject runnable, long image);
+
+    // execute the callback on the java thread and destroy ourselves
+    static void postToJavaAndDestroy(void*, void* user);
+
+private:
+    JniImageCallback(JNIEnv* env, jobject handler, jobject runnable, long image);
+    virtual ~JniImageCallback();
+    long mImage;
+};