content: /*
   * Copyright (C) 2018 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.launcher3.icons;
  
  import android.graphics.Bitmap;
  import android.graphics.Rect;
  import android.graphics.Region;
  import android.graphics.RegionIterator;
  import android.util.Log;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  
  import androidx.annotation.ColorInt;
  
  public class GraphicsUtils {
  
      private static final String TAG = "GraphicsUtils";
  
      /**
       * Set the alpha component of {@code color} to be {@code alpha}. Unlike the support lib version,
       * it bounds the alpha in valid range instead of throwing an exception to allow for safer
       * interpolation of color animations
       */
      @ColorInt
      public static int setColorAlphaBound(int color, int alpha) {
          if (alpha < 0) {
              alpha = 0;
          } else if (alpha > 255) {
              alpha = 255;
          }
          return (color & 0x00ffffff) | (alpha << 24);
      }
  
      /**
       * Compresses the bitmap to a byte array for serialization.
       */
      public static byte[] flattenBitmap(Bitmap bitmap) {
          // Try go guesstimate how much space the icon will take when serialized
          // to avoid unnecessary allocations/copies during the write (4 bytes per pixel).
          int size = bitmap.getWidth() * bitmap.getHeight() * 4;
          ByteArrayOutputStream out = new ByteArrayOutputStream(size);
          try {
              bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
              out.flush();
              out.close();
              return out.toByteArray();
          } catch (IOException e) {
              Log.w(TAG, "Could not write bitmap");
              return null;
          }
      }
  
      public static int getArea(Region r) {
          RegionIterator itr = new RegionIterator(r);
          int area = 0;
          Rect tempRect = new Rect();
          while (itr.next(tempRect)) {
              area += tempRect.width() * tempRect.height();
          }
          return area;
      }
  }
  