content: /*
   * 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 java.awt.AlphaComposite;
  import java.awt.Composite;
  
  /**
   * Provides various utility methods for {@link PorterDuffColorFilter_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);
          }
      }
  }
  