/*
* 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.uc.webkit.impl;
import com.uc.webkit.helper.CanvasHelper;
import com.uc.webkit.helper.ViewRootHelper;
import android.graphics.Canvas;
import android.util.Log;
import org.chromium.content.common.CleanupReference;
// 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();
// NOTE: The STATUS_* values *must* match the enum in DrawGlInfo.h
/**
* Indicates that the display list is done drawing.
*
* @see HardwareCanvas#drawDisplayList(DisplayList, android.graphics.Rect, int)
*
* @hide
*/
public static final int STATUS_DONE = 0x0;
/**
* Indicates that the display list needs another drawing pass.
*
* @see HardwareCanvas#drawDisplayList(DisplayList, android.graphics.Rect, int)
*
* @hide
*/
public static final int STATUS_DRAW = 0x1;
/**
* Indicates that the display list needs to re-execute its GL functors.
*
* @see HardwareCanvas#drawDisplayList(DisplayList, android.graphics.Rect, int)
* @see HardwareCanvas#callDrawGLFunction(int)
*
* @hide
*/
public static final int STATUS_INVOKE = 0x2;
/**
* Indicates that the display list performed GL drawing operations.
*
* @see HardwareCanvas#drawDisplayList(DisplayList, android.graphics.Rect, int)
*
* @hide
*/
public static final int STATUS_DREW = 0x4;
// Pointer to native side instance
private CleanupReference mCleanupReference;
private DestroyRunnable mDestroyRunnable;
public DrawGLFunctor(int viewContext) {
mDestroyRunnable = new DestroyRunnable(nativeCreateGLFunctor(viewContext));
mCleanupReference = new CleanupReference(this, mDestroyRunnable);
}
public void destroy() {
if (mCleanupReference != null) {
mCleanupReference.cleanupNow();
mCleanupReference = null;
mDestroyRunnable = null;
}
}
public void detach() {
mDestroyRunnable.detachNativeFunctor();
}
public boolean requestDrawGL(Canvas canvas, Object viewRootImpl) {
if (mDestroyRunnable.mNativeDrawGLFunctor == 0) {
throw new RuntimeException("requested DrawGL on already destroyed DrawGLFunctor");
}
mDestroyRunnable.mViewRootImpl = viewRootImpl;
if (canvas != null) {
// int ret = canvas.callDrawGLFunction(mDestroyRunnable.mNativeDrawGLFunctor);
int ret = CanvasHelper.callDrawGLFunction(canvas, mDestroyRunnable.mNativeDrawGLFunctor);
if (ret != STATUS_DONE) {
Log.e(TAG, "callDrawGLFunction error: " + ret);
return false;
}
} else {
// viewRootImpl.attachFunctor(mDestroyRunnable.mNativeDrawGLFunctor);
ViewRootHelper.attachFunctor(viewRootImpl, mDestroyRunnable.mNativeDrawGLFunctor);
}
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 static final class DestroyRunnable implements Runnable {
// ViewRootImpl mViewRootImpl;
Object 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) {
// mViewRootImpl.detachFunctor(mNativeDrawGLFunctor);
ViewRootHelper.detachFunctor(mViewRootImpl, mNativeDrawGLFunctor);
}
mViewRootImpl = null;
}
}
private static native int nativeCreateGLFunctor(int viewContext);
private static native void nativeDestroyGLFunctor(int functor);
private static native void nativeSetChromiumAwDrawGLFunction(int functionPointer);
}