android_view_SurfaceSession.cpp revision 693f3432ae77d1fcfaaf9d168de861192aacb4c4 
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 "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
29namespace android {
30
31static struct {
32    jfieldID mNativeClient;
33} gSurfaceSessionClassInfo;
34
35
36sp<SurfaceComposerClient> android_view_SurfaceSession_getClient(
37        JNIEnv* env, jobject surfaceSessionObj) {
38    return reinterpret_cast<SurfaceComposerClient*>(
39            env->GetLongField(surfaceSessionObj, gSurfaceSessionClassInfo.mNativeClient));
40}
41
42
43static jlong nativeCreate(JNIEnv* env, jclass clazz) {
44    SurfaceComposerClient* client = new SurfaceComposerClient();
45    client->incStrong((void*)nativeCreate);
46    return reinterpret_cast<jlong>(client);
47}
48
49static 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
56static void nativeDestroy(JNIEnv* env, jclass clazz, jlong ptr) {
57    SurfaceComposerClient* client = reinterpret_cast<SurfaceComposerClient*>(ptr);
58    client->decStrong((void*)nativeCreate);
59}
60
61static void nativeKill(JNIEnv* env, jclass clazz, jlong ptr) {
62    SurfaceComposerClient* client = reinterpret_cast<SurfaceComposerClient*>(ptr);
63    client->dispose();
64}
65
66static 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
78int 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