Files
filament/android/common/CallbackUtils.cpp
Philip Rideout 94b4f92bc5 Android: move JNI C++ utils into a common folder.
No need for a proper library, this is just a common location to simplify
JNI bindings in other projects like filamat and gltfio.

There is no need to move the one Java source file (`NioUtils.java`)
since downstream libraries will have a dependency on Filament, and
FindClass should work fine.
2019-06-17 08:47:27 -07:00

111 lines
3.9 KiB
C++

/*
* 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.
*/
#include <functional>
#include "CallbackUtils.h"
struct {
#ifdef ANDROID
jclass handlerClass;
jmethodID post;
#endif
jclass executorClass;
jmethodID execute;
} gCallbackUtils;
JniCallback* JniCallback::make(filament::Engine* engine,
JNIEnv* env, jobject handler, jobject callback) {
void* that = engine->streamAlloc(sizeof(JniCallback), alignof(JniCallback));
return new (that) JniCallback(env, handler, callback);
}
JniCallback::JniCallback(JNIEnv* env, jobject handler, jobject callback)
: mEnv(env)
, mHandler(env->NewGlobalRef(handler))
, mCallback(env->NewGlobalRef(callback)) {
}
JniCallback::~JniCallback() {
if (mHandler && mCallback) {
#ifdef ANDROID
if (mEnv->IsInstanceOf(mHandler, gCallbackUtils.handlerClass)) {
mEnv->CallBooleanMethod(mHandler, gCallbackUtils.post, mCallback);
}
#endif
if (mEnv->IsInstanceOf(mHandler, gCallbackUtils.executorClass)) {
mEnv->CallVoidMethod(mHandler, gCallbackUtils.execute, mCallback);
}
}
mEnv->DeleteGlobalRef(mHandler);
mEnv->DeleteGlobalRef(mCallback);
}
void JniCallback::invoke(void*, size_t, void* user) {
JniCallback* data = reinterpret_cast<JniCallback*>(user);
// don't call delete here, because we don't own the storage
data->~JniCallback();
}
JniBufferCallback* JniBufferCallback::make(filament::Engine* engine,
JNIEnv* env, jobject handler, jobject callback, AutoBuffer&& buffer) {
void* that = engine->streamAlloc(sizeof(JniBufferCallback), alignof(JniBufferCallback));
return new (that) JniBufferCallback(env, handler, callback, std::move(buffer));
}
JniBufferCallback::JniBufferCallback(JNIEnv* env, jobject handler, jobject callback,
AutoBuffer&& buffer)
: mEnv(env)
, mHandler(env->NewGlobalRef(handler))
, mCallback(env->NewGlobalRef(callback))
, mBuffer(std::move(buffer)){
}
JniBufferCallback::~JniBufferCallback() {
if (mHandler && mCallback) {
#ifdef ANDROID
if (mEnv->IsInstanceOf(mHandler, gCallbackUtils.handlerClass)) {
mEnv->CallBooleanMethod(mHandler, gCallbackUtils.post, mCallback);
}
#endif
if (mEnv->IsInstanceOf(mHandler, gCallbackUtils.executorClass)) {
mEnv->CallVoidMethod(mHandler, gCallbackUtils.execute, mCallback);
}
}
mEnv->DeleteGlobalRef(mHandler);
mEnv->DeleteGlobalRef(mCallback);
}
void JniBufferCallback::invoke(void*, size_t, void* user) {
JniBufferCallback* data = reinterpret_cast<JniBufferCallback*>(user);
// don't call delete here, because we don't own the storage
data->~JniBufferCallback();
}
void registerCallbackUtils(JNIEnv *env) {
#ifdef ANDROID
gCallbackUtils.handlerClass = env->FindClass("android/os/Handler");
gCallbackUtils.handlerClass = (jclass) env->NewGlobalRef(gCallbackUtils.handlerClass);
gCallbackUtils.post = env->GetMethodID(gCallbackUtils.handlerClass,
"post", "(Ljava/lang/Runnable;)Z");
#endif
gCallbackUtils.executorClass = env->FindClass("java/util/concurrent/Executor");
gCallbackUtils.executorClass = (jclass) env->NewGlobalRef(gCallbackUtils.executorClass);
gCallbackUtils.execute = env->GetMethodID(gCallbackUtils.executorClass,
"execute", "(Ljava/lang/Runnable;)V");
}