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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "SurfaceSession"
     18 
     19 #include <nativehelper/JNIHelp.h>
     20 
     21 #include <android_runtime/AndroidRuntime.h>
     22 #include <android_runtime/android_view_SurfaceSession.h>
     23 #include <utils/Log.h>
     24 #include <utils/RefBase.h>
     25 
     26 #include <gui/SurfaceComposerClient.h>
     27 #include <gui/Surface.h>
     28 
     29 namespace android {
     30 
     31 static struct {
     32     jfieldID mNativeClient;
     33 } gSurfaceSessionClassInfo;
     34 
     35 
     36 sp<SurfaceComposerClient> android_view_SurfaceSession_getClient(
     37         JNIEnv* env, jobject surfaceSessionObj) {
     38     return reinterpret_cast<SurfaceComposerClient*>(
     39             env->GetLongField(surfaceSessionObj, gSurfaceSessionClassInfo.mNativeClient));
     40 }
     41 
     42 
     43 static jlong nativeCreate(JNIEnv* env, jclass clazz) {
     44     SurfaceComposerClient* client = new SurfaceComposerClient();
     45     client->incStrong((void*)nativeCreate);
     46     return reinterpret_cast<jlong>(client);
     47 }
     48 
     49 static jlong nativeCreateScoped(JNIEnv* env, jclass clazz, jlong surfaceObject) {
     50     Surface *parent = reinterpret_cast<Surface*>(surfaceObject);
     51     SurfaceComposerClient* client = new SurfaceComposerClient(parent->getIGraphicBufferProducer());
     52     client->incStrong((void*)nativeCreate);
     53     return reinterpret_cast<jlong>(client);
     54 }
     55 
     56 static void nativeDestroy(JNIEnv* env, jclass clazz, jlong ptr) {
     57     SurfaceComposerClient* client = reinterpret_cast<SurfaceComposerClient*>(ptr);
     58     client->decStrong((void*)nativeCreate);
     59 }
     60 
     61 static void nativeKill(JNIEnv* env, jclass clazz, jlong ptr) {
     62     SurfaceComposerClient* client = reinterpret_cast<SurfaceComposerClient*>(ptr);
     63     client->dispose();
     64 }
     65 
     66 static const JNINativeMethod gMethods[] = {
     67     /* name, signature, funcPtr */
     68     { "nativeCreate", "()J",
     69             (void*)nativeCreate },
     70     { "nativeCreateScoped", "(J)J",
     71             (void*)nativeCreateScoped },
     72     { "nativeDestroy", "(J)V",
     73             (void*)nativeDestroy },
     74     { "nativeKill", "(J)V",
     75             (void*)nativeKill }
     76 };
     77 
     78 int register_android_view_SurfaceSession(JNIEnv* env) {
     79     int res = jniRegisterNativeMethods(env, "android/view/SurfaceSession",
     80             gMethods, NELEM(gMethods));
     81     LOG_ALWAYS_FATAL_IF(res < 0, "Unable to register native methods.");
     82 
     83     jclass clazz = env->FindClass("android/view/SurfaceSession");
     84     gSurfaceSessionClassInfo.mNativeClient = env->GetFieldID(clazz, "mNativeClient", "J");
     85     return 0;
     86 }
     87 
     88 } // namespace android
     89