content: /*
   * 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.Shader.TileMode;
  
  import libcore.util.NativeAllocationRegistry_Delegate;
  
  /**
   * Delegate implementing the native methods of android.graphics.Shader
   *
   * Through the layoutlib_create tool, the original native methods of Shader 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 Shader class.
   *
   * This also serve as a base class for all Shader delegate classes.
   *
   * @see DelegateManager
   *
   */
  public abstract class Shader_Delegate {
  
      // ---- delegate manager ----
      protected static final DelegateManager<Shader_Delegate> sManager =
              new DelegateManager<Shader_Delegate>(Shader_Delegate.class);
      private static long sFinalizer = -1;
  
      // ---- delegate helper data ----
  
      // ---- delegate data ----
      private Matrix_Delegate mLocalMatrix = null;
      private float mAlpha = 1.0f;
  
      // ---- Public Helper methods ----
  
      public static Shader_Delegate getDelegate(long nativeShader) {
          return sManager.getDelegate(nativeShader);
      }
  
      /**
       * Returns the {@link TileMode} matching the given int.
       * @param tileMode the tile mode int value
       * @return the TileMode enum.
       */
      public static TileMode getTileMode(int tileMode) {
          for (TileMode tm : TileMode.values()) {
              if (tm.nativeInt == tileMode) {
                  return tm;
              }
          }
  
          assert false;
          return TileMode.CLAMP;
      }
  
      public abstract java.awt.Paint getJavaPaint();
      public abstract boolean isSupported();
      public abstract String getSupportMessage();
  
      // ---- native methods ----
  
      @LayoutlibDelegate
      /*package*/ static long nativeGetFinalizer() {
          synchronized (Shader_Delegate.class) {
              if (sFinalizer == -1) {
                  sFinalizer = NativeAllocationRegistry_Delegate.createFinalizer(
                          sManager::removeJavaReferenceFor);
              }
          }
          return sFinalizer;
      }
  
      // ---- Private delegate/helper methods ----
  
      protected Shader_Delegate(long nativeMatrix) {
          setLocalMatrix(nativeMatrix);
      }
  
      public void setLocalMatrix(long nativeMatrix) {
          mLocalMatrix = Matrix_Delegate.getDelegate(nativeMatrix);
      }
  
      protected java.awt.geom.AffineTransform getLocalMatrix() {
          if (mLocalMatrix != null) {
              return mLocalMatrix.getAffineTransform();
          }
  
          return new java.awt.geom.AffineTransform();
      }
  
      public void setAlpha(float alpha) {
          mAlpha = alpha;
      }
  
      public float getAlpha() {
          return mAlpha;
      }
  }
  