// Copyright (c) 2014 mogoweb. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/*
* Copyright (C) 2012 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.
*/
package com.mogoweb.chrome.impl;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.chromium.content.common.CleanupReference;
import android.graphics.Canvas;
import android.os.Build;
import android.util.Log;
import android.view.View;
import android.view.ViewParent;
// Simple Java abstraction and wrapper for the native DrawGLFunctor flow.
// An instance of this class can be constructed, bound to a single view context (i.e. AwContennts)
// and then drawn and detached from the view tree any number of times (using requestDrawGL and
// detach respectively). Then when finished with, it can be explicitly released by calling
// destroy() or will clean itself up as required via finalizer / CleanupReference.
public class DrawGLFunctor {
private static final String TAG = DrawGLFunctor.class.getSimpleName();
private static final String HARDWARE_CANVAS_CLASS = "android.view.HardwareCanvas";
private static final String VIEW_ROOT_IMPL_CLASS = "android.view.ViewRootImpl";
// Pointer to native side instance
private CleanupReference mCleanupReference;
private DestroyRunnable mDestroyRunnable;
Class<?> mClassTypeOfHardwareCanvas;
Class<?> mClassTypeOfViewRootImpl;
Method mGetViewRootImplMethod;
Method mCallDrawGLFunction;
Method mAttachFunctor;
Method mDetachFunctor;
public DrawGLFunctor(int viewContext) {
mDestroyRunnable = new DestroyRunnable(nativeCreateGLFunctor(viewContext));
mCleanupReference = new CleanupReference(this, mDestroyRunnable);
try {
mClassTypeOfHardwareCanvas = Class.forName(HARDWARE_CANVAS_CLASS);
mClassTypeOfViewRootImpl = Class.forName(VIEW_ROOT_IMPL_CLASS);
// in Android ICS, getViewRootImpl is not public and attachFunctor/detachFunctor not available
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mGetViewRootImplMethod = View.class.getMethod("getViewRootImpl", new Class[]{});
mAttachFunctor = mClassTypeOfViewRootImpl.getMethod("attachFunctor", new Class[]{int.class});
mDetachFunctor = mClassTypeOfViewRootImpl.getMethod("detachFunctor", new Class[]{int.class});
}
mCallDrawGLFunction = mClassTypeOfHardwareCanvas.getMethod("callDrawGLFunction", new Class[]{int.class});
} catch (ClassNotFoundException exception) {
Log.e(TAG, "ClassNotFoundException occured: " + exception.getMessage());
} catch (NoSuchMethodException exception) {
Log.e(TAG, "NoSuchMethodException occured: " + exception.getMessage());
}
}
public void destroy() {
if (mCleanupReference != null) {
mCleanupReference.cleanupNow();
mCleanupReference = null;
mDestroyRunnable = null;
}
}
public void detach() {
mDestroyRunnable.detachNativeFunctor();
}
public boolean requestDrawGL(Canvas canvas, View view) {
if (mDestroyRunnable.mNativeDrawGLFunctor == 0) {
throw new RuntimeException("requested DrawGL on already destroyed DrawGLFunctor");
}
try {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
View root = view.getRootView();
mDestroyRunnable.mViewRootImpl = root != null ? (ViewParent)root.getParent() : null;
} else {
mDestroyRunnable.mViewRootImpl = (ViewParent)mGetViewRootImplMethod.invoke(view, new Object[]{});
}
if (canvas != null) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
Boolean i = (Boolean)mCallDrawGLFunction.invoke(canvas, new Object[]{Integer.valueOf(mDestroyRunnable.mNativeDrawGLFunctor)});
boolean ret = i.booleanValue();
if (!ret) {
Log.e(TAG, "callDrawGLFunction error: " + ret);
return false;
}
} else {
Integer i = (Integer)mCallDrawGLFunction.invoke(canvas, new Object[]{Integer.valueOf(mDestroyRunnable.mNativeDrawGLFunctor)});
int ret = i.intValue();
if (ret != 0) {
Log.e(TAG, "callDrawGLFunction error: " + ret);
return false;
}
}
} else {
if (mDestroyRunnable.mViewRootImpl != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
mAttachFunctor.invoke(mDestroyRunnable.mViewRootImpl, new Object[]{Integer.valueOf(mDestroyRunnable.mNativeDrawGLFunctor)});
}
} catch (IllegalAccessException exception) {
Log.e(TAG, "IllegalAccessException:" + exception.getMessage());
exception.printStackTrace();
} catch (IllegalArgumentException exception) {
Log.e(TAG, "IllegalArgumentException:" + exception.getMessage());
exception.printStackTrace();
} catch (InvocationTargetException exception) {
Log.e(TAG, "InvocationTargetException:" + exception.getMessage());
exception.printStackTrace();
}
return true;
}
public static void setChromiumAwDrawGLFunction(int functionPointer) {
nativeSetChromiumAwDrawGLFunction(functionPointer);
}
// Holds the core resources of the class, everything required to correctly cleanup.
// IMPORTANT: this class must not hold any reference back to the outer DrawGLFunctor
// instance, as that will defeat GC of that object.
private class DestroyRunnable implements Runnable {
ViewParent mViewRootImpl;
int mNativeDrawGLFunctor;
DestroyRunnable(int nativeDrawGLFunctor) {
mNativeDrawGLFunctor = nativeDrawGLFunctor;
}
// Called when the outer DrawGLFunctor instance has been GC'ed, i.e this is its finalizer.
@Override
public void run() {
detachNativeFunctor();
nativeDestroyGLFunctor(mNativeDrawGLFunctor);
mNativeDrawGLFunctor = 0;
}
void detachNativeFunctor() {
if (mNativeDrawGLFunctor != 0 && mViewRootImpl != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
try {
mDetachFunctor.invoke(mViewRootImpl, new Object[]{Integer.valueOf(mNativeDrawGLFunctor)});
} catch (IllegalAccessException exception) {
Log.e(TAG, "illegalAccessException:" + exception.getMessage());
exception.printStackTrace();
} catch (IllegalArgumentException exception) {
Log.e(TAG, "IllegalArgumentException:" + exception.getMessage());
exception.printStackTrace();
} catch (InvocationTargetException exception) {
Log.e(TAG, "InvocationTargetException:" + exception.getMessage());
exception.printStackTrace();
}
}
mViewRootImpl = null;
}
}
private static native int nativeCreateGLFunctor(int viewContext);
private static native void nativeDestroyGLFunctor(int functor);
private static native void nativeSetChromiumAwDrawGLFunction(int functionPointer);
}