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/*
* Copyright (C) 2014 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.android.layoutlib.bridge.impl;
import com.android.ide.common.rendering.api.LayoutLog;
import com.android.layoutlib.bridge.Bridge;
import android.graphics.BlendComposite;
import android.graphics.BlendComposite.BlendingMode;
import android.graphics.PorterDuff;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffColorFilter_Delegate;
import android.graphics.PorterDuffXfermode_Delegate;
import java.awt.AlphaComposite;
import java.awt.Composite;
/**
* Provides various utility methods for {@link PorterDuffColorFilter_Delegate} and {@link
* PorterDuffXfermode_Delegate}.
*/
public final class PorterDuffUtility {
private static final int MODES_COUNT = Mode.values().length;
// Make the class non-instantiable.
private PorterDuffUtility() {
}
/**
* Convert the porterDuffMode from the framework to its corresponding enum. This defaults to
* {@link Mode#SRC_OVER} for invalid modes.
*/
public static Mode getPorterDuffMode(int porterDuffMode) {
if (porterDuffMode >= 0 && porterDuffMode < MODES_COUNT) {
return PorterDuff.intToMode(porterDuffMode);
}
Bridge.getLog().error(LayoutLog.TAG_BROKEN,
String.format("Unknown PorterDuff.Mode: %1$d", porterDuffMode), null);
assert false;
return Mode.SRC_OVER;
}
/**
* A utility method to get the {@link Composite} that represents the filter for the given
* PorterDuff mode and the alpha. Defaults to {@link Mode#SRC_OVER} for invalid modes.
*/
public static Composite getComposite(Mode mode, int alpha255) {
float alpha1 = alpha255 != 0xFF ? alpha255 / 255.f : 1.f;
switch (mode) {
case CLEAR:
return AlphaComposite.getInstance(AlphaComposite.CLEAR, alpha1);
case SRC:
return AlphaComposite.getInstance(AlphaComposite.SRC, alpha1);
case DST:
return AlphaComposite.getInstance(AlphaComposite.DST, alpha1);
case SRC_OVER:
return AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha1);
case DST_OVER:
return AlphaComposite.getInstance(AlphaComposite.DST_OVER, alpha1);
case SRC_IN:
return AlphaComposite.getInstance(AlphaComposite.SRC_IN, alpha1);
case DST_IN:
return AlphaComposite.getInstance(AlphaComposite.DST_IN, alpha1);
case SRC_OUT:
return AlphaComposite.getInstance(AlphaComposite.SRC_OUT, alpha1);
case DST_OUT:
return AlphaComposite.getInstance(AlphaComposite.DST_OUT, alpha1);
case SRC_ATOP:
return AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha1);
case DST_ATOP:
return AlphaComposite.getInstance(AlphaComposite.DST_ATOP, alpha1);
case XOR:
return AlphaComposite.getInstance(AlphaComposite.XOR, alpha1);
case DARKEN:
return BlendComposite.getInstance(BlendingMode.DARKEN, alpha1);
case LIGHTEN:
return BlendComposite.getInstance(BlendingMode.LIGHTEN, alpha1);
case MULTIPLY:
return BlendComposite.getInstance(BlendingMode.MULTIPLY, alpha1);
case SCREEN:
return BlendComposite.getInstance(BlendingMode.SCREEN, alpha1);
case ADD:
return BlendComposite.getInstance(BlendingMode.ADD, alpha1);
case OVERLAY:
return BlendComposite.getInstance(BlendingMode.OVERLAY, alpha1);
default:
Bridge.getLog().fidelityWarning(LayoutLog.TAG_BROKEN,
String.format("Unsupported PorterDuff Mode: %1$s", mode.name()),
null, null /*data*/);
return AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha1);
}
}
}
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