android_view_ThreadedRenderer.cpp revision cec24ae16e9a0a7c3075f1a8d9149bb7fb3813fc 
1/*
2 * Copyright (C) 2010 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 "GLRenderer"
18
19#include "jni.h"
20#include <nativehelper/JNIHelp.h>
21#include <android_runtime/AndroidRuntime.h>
22
23#include <renderthread/RenderTask.h>
24#include <renderthread/RenderThread.h>
25
26namespace android {
27
28#ifdef USE_OPENGL_RENDERER
29
30namespace RT = android::uirenderer::renderthread;
31
32static jmethodID gRunnableMethod;
33
34class JavaTask : public RT::RenderTask {
35public:
36    JavaTask(JNIEnv* env, jobject jrunnable) {
37        env->GetJavaVM(&mVm);
38        mRunnable = env->NewGlobalRef(jrunnable);
39    }
40
41    virtual ~JavaTask() {
42        env()->DeleteGlobalRef(mRunnable);
43    }
44
45    virtual void run() {
46        env()->CallVoidMethod(mRunnable, gRunnableMethod);
47    };
48
49private:
50    JNIEnv* env() {
51        JNIEnv* env;
52        if (mVm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
53            return 0;
54        }
55        return env;
56    }
57
58    JavaVM* mVm;
59    jobject mRunnable;
60};
61
62static void android_view_ThreadedRenderer_postToRenderThread(JNIEnv* env, jobject clazz,
63        jobject jrunnable) {
64    RT::RenderTask* task = new JavaTask(env, jrunnable);
65    RT::RenderThread::getInstance().queue(task);
66}
67
68#endif
69
70// ----------------------------------------------------------------------------
71// JNI Glue
72// ----------------------------------------------------------------------------
73
74const char* const kClassPathName = "android/view/ThreadedRenderer";
75
76static JNINativeMethod gMethods[] = {
77#ifdef USE_OPENGL_RENDERER
78    { "postToRenderThread", "(Ljava/lang/Runnable;)V",   (void*) android_view_ThreadedRenderer_postToRenderThread },
79#endif
80};
81
82int register_android_view_ThreadedRenderer(JNIEnv* env) {
83#ifdef USE_OPENGL_RENDERER
84    jclass cls = env->FindClass("java/lang/Runnable");
85    gRunnableMethod = env->GetMethodID(cls, "run", "()V");
86    env->DeleteLocalRef(cls);
87#endif
88    return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
89}
90
91}; // namespace android
92