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/*
* Copyright (C) 2010 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 android.graphics;
import com.android.layoutlib.bridge.impl.DelegateManager;
import com.android.layoutlib.bridge.impl.PorterDuffUtility;
import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
import android.graphics.PorterDuff.Mode;
import java.awt.Composite;
import static com.android.layoutlib.bridge.impl.PorterDuffUtility.getPorterDuffMode;
/**
* Delegate implementing the native methods of android.graphics.PorterDuffXfermode
*
* Through the layoutlib_create tool, the original native methods of PorterDuffXfermode have been
* replaced by calls to methods of the same name in this delegate class.
*
* This class behaves like the original native implementation, but in Java, keeping previously
* native data into its own objects and mapping them to int that are sent back and forth between
* it and the original PorterDuffXfermode class.
*
* Because this extends {@link Xfermode_Delegate}, there's no need to use a
* {@link DelegateManager}, as all the PathEffect classes will be added to the manager owned by
* {@link Xfermode_Delegate}.
*
*/
public class PorterDuffXfermode_Delegate extends Xfermode_Delegate {
// ---- delegate data ----
private final Mode mMode;
// ---- Public Helper methods ----
public Mode getMode() {
return mMode;
}
@Override
public Composite getComposite(int alpha) {
return PorterDuffUtility.getComposite(mMode, alpha);
}
@Override
public boolean isSupported() {
return true;
}
@Override
public String getSupportMessage() {
// no message since isSupported returns true;
return null;
}
// ---- native methods ----
@LayoutlibDelegate
/*package*/ static long nativeCreateXfermode(int mode) {
PorterDuffXfermode_Delegate newDelegate = new PorterDuffXfermode_Delegate(mode);
return sManager.addNewDelegate(newDelegate);
}
// ---- Private delegate/helper methods ----
private PorterDuffXfermode_Delegate(int mode) {
mMode = getPorterDuffMode(mode);
}
}
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