content: /*
   * Copyright (C) 2012 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 androidx.renderscript;
  
  import android.content.Context;
  import android.content.res.Resources;
  import android.util.Log;
  
  /**
   * Intrinsic Gausian blur filter. Applies a gaussian blur of the
   * specified radius to all elements of an allocation.
   *
   *
   **/
  public class ScriptIntrinsicBlur extends ScriptIntrinsic {
      private final float[] mValues = new float[9];
      private Allocation mInput;
      // API level for the intrinsic
      private static final int INTRINSIC_API_LEVEL = 19;
  
      protected ScriptIntrinsicBlur(long id, RenderScript rs) {
          super(id, rs);
      }
  
      /**
       * Create an intrinsic for applying a blur to an allocation. The
       * default radius is 5.0.
       *
       * Supported elements types are {@link Element#U8},
       * {@link Element#U8_4}.
       *
       * @param rs The RenderScript context
       * @param e Element type for inputs and outputs
       *
       * @return ScriptIntrinsicBlur
       */
      public static ScriptIntrinsicBlur create(RenderScript rs, Element e) {
          if ((!e.isCompatible(Element.U8_4(rs))) && (!e.isCompatible(Element.U8(rs)))) {
              throw new RSIllegalArgumentException("Unsupported element type.");
          }
          long id;
          boolean mUseIncSupp = rs.isUseNative() &&
                                android.os.Build.VERSION.SDK_INT < INTRINSIC_API_LEVEL;
  
          id = rs.nScriptIntrinsicCreate(5, e.getID(rs), mUseIncSupp);
  
          ScriptIntrinsicBlur si = new ScriptIntrinsicBlur(id, rs);
          si.setIncSupp(mUseIncSupp);
          si.setRadius(5.f);
  
          return si;
      }
  
      /**
       * Set the input of the blur.
       * Must match the element type supplied during create.
       *
       * @param ain The input allocation
       */
      public void setInput(Allocation ain) {
          if (ain.getType().getY() == 0) {
              throw new RSIllegalArgumentException("Input set to a 1D Allocation");
          }
          mInput = ain;
          setVar(1, ain);
      }
  
      /**
       * Set the radius of the Blur.
       *
       * Supported range 0 < radius <= 25
       *
       * @param radius The radius of the blur
       */
      public void setRadius(float radius) {
          if (radius <= 0 || radius > 25) {
              throw new RSIllegalArgumentException("Radius out of range (0 < r <= 25).");
          }
          setVar(0, radius);
      }
  
      /**
       * Apply the filter to the input and save to the specified
       * allocation.
       *
       * @param aout Output allocation. Must match creation element
       *             type.
       */
      public void forEach(Allocation aout) {
          if (aout.getType().getY() == 0) {
              throw new RSIllegalArgumentException("Output is a 1D Allocation");
          }
          forEach(0, (Allocation) null, aout, null);
      }
  
      /**
       * Get a KernelID for this intrinsic kernel.
       *
       * @return Script.KernelID The KernelID object.
       */
      public Script.KernelID getKernelID() {
          return createKernelID(0, 2, null, null);
      }
  
      /**
       * Get a FieldID for the input field of this intrinsic.
       *
       * @return Script.FieldID The FieldID object.
       */
      public Script.FieldID getFieldID_Input() {
          return createFieldID(1, null);
      }
  }
  
  