| /* |
| * 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.tools.layoutlib.annotations.LayoutlibDelegate; |
| |
| import android.graphics.PorterDuff.Mode; |
| |
| import java.awt.Graphics2D; |
| import java.awt.image.BufferedImage; |
| |
| import static com.android.layoutlib.bridge.impl.PorterDuffUtility.getComposite; |
| import static com.android.layoutlib.bridge.impl.PorterDuffUtility.getPorterDuffMode; |
| |
| /** |
| * Delegate implementing the native methods of android.graphics.PorterDuffColorFilter |
| * |
| * Through the layoutlib_create tool, the original native methods of PorterDuffColorFilter 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| * been replaced by calls to methods of the same name in this delegate class.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 PorterDuffColorFilter class. |
| * |
| * Because this extends {@link ColorFilter_Delegate}, there's no need to use a |
| * {@link DelegateManager}, as all the Shader classes will be added to the manager |
| * owned by {@link ColorFilter_Delegate}. |
| * |
| * @see ColorFilter_Delegate |
| * |
| */ |
| public class PorterDuffColorFilter_Delegate extends ColorFilter_Delegate { |
| |
| // ---- delegate data ---- |
| |
| private final java.awt.Color mSrcColor; |
| private final Mode mMode; |
| |
| |
| // ---- Public Helper methods ---- |
| |
| @Override |
| public boolean isSupported() { |
| return true; |
| } |
| |
| @Override |
| public String getSupportMessage() { |
| return "PorterDuff Color Filter is not supported for mode: " + mMode.name() + "."; |
| } |
| |
| @Override |
| public void applyFilter(Graphics2D g, int width, int height) { |
| g.setComposite(getComposite(mMode, 0xFF)); |
| g.setColor(mSrcColor); |
| g.fillRect(0, 0, width, height); |
| } |
| |
| // ---- native methods ---- |
| |
| @LayoutlibDelegate |
| /*package*/ static long native_CreatePorterDuffFilter(int srcColor, int porterDuffMode) { |
| PorterDuffColorFilter_Delegate newDelegate = |
| new PorterDuffColorFilter_Delegate(srcColor, porterDuffMode); |
| return sManager.addNewDelegate(newDelegate); |
| } |
| |
| |
| // ---- Private delegate/helper methods ---- |
| |
| private PorterDuffColorFilter_Delegate(int srcColor, int mode) { |
| mSrcColor = new java.awt.Color(srcColor, true /* hasAlpha */); |
| mMode = getCompatibleMode(getPorterDuffMode(mode)); |
| } |
| |
| // For filtering the colors, the src image should contain the "color" only for pixel values |
| // which are not transparent in the target image. But, we are using a simple rectangular image |
| // completely filled with color. Hence some Composite rules do not apply as intended. However, |
| // in such cases, they can usually be mapped to some other mode, which produces an approximately |
| // equivalent result. |
| private Mode getCompatibleMode(Mode mode) { |
| Mode m = mode; |
| // Modes that are directly supported: |
| // CLEAR, DST, SRC_IN, DST_IN, DST_OUT, SRC_ATOP, DARKEN, LIGHTEN, MULTIPLY, SCREEN, |
| // ADD, OVERLAY |
| switch (mode) { |
| // Modes that can be mapped to one of the supported modes. |
| case SRC: |
| m = Mode.SRC_IN; |
| break; |
| case SRC_OVER: |
| m = Mode.SRC_ATOP; |
| break; |
| case DST_OVER: |
| m = Mode.DST; |
| break; |
| case SRC_OUT: |
| m = Mode.CLEAR; |
| break; |
| case DST_ATOP: |
| m = Mode.DST_IN; |
| break; |
| case XOR: |
| m = Mode.DST_OUT; |
| break; |
| } |
| return m; |
| } |
| } |