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 android.hardware.input;
  
  import android.os.Parcel;
  import android.os.Parcelable;
  
  /**
   * Encapsulates calibration data for input devices.
   *
   * @hide
   */
  public class TouchCalibration implements Parcelable {
  
      public static final TouchCalibration IDENTITY = new TouchCalibration();
  
      public static final @android.annotation.NonNull Parcelable.Creator<TouchCalibration> CREATOR
              = new Parcelable.Creator<TouchCalibration>() {
          public TouchCalibration createFromParcel(Parcel in) {
              return new TouchCalibration(in);
          }
  
          public TouchCalibration[] newArray(int size) {
              return new TouchCalibration[size];
          }
      };
  
      private final float mXScale, mXYMix, mXOffset;
      private final float mYXMix, mYScale, mYOffset;
  
      /**
       * Create a new TouchCalibration initialized to the identity transformation.
       */
      public TouchCalibration() {
          this(1,0,0,0,1,0);
      }
  
      /**
       * Create a new TouchCalibration from affine transformation paramters.
       * @param xScale   Influence of input x-axis value on output x-axis value.
       * @param xyMix    Influence of input y-axis value on output x-axis value.
       * @param xOffset  Constant offset to be applied to output x-axis value.
       * @param yXMix    Influence of input x-axis value on output y-axis value.
       * @param yScale   Influence of input y-axis value on output y-axis value.
       * @param yOffset  Constant offset to be applied to output y-axis value.
       */
      public TouchCalibration(float xScale, float xyMix, float xOffset,
              float yxMix, float yScale, float yOffset) {
          mXScale  = xScale;
          mXYMix   = xyMix;
          mXOffset = xOffset;
          mYXMix   = yxMix;
          mYScale  = yScale;
          mYOffset = yOffset;
      }
  
      public TouchCalibration(Parcel in) {
          mXScale  = in.readFloat();
          mXYMix   = in.readFloat();
          mXOffset = in.readFloat();
          mYXMix   = in.readFloat();
          mYScale  = in.readFloat();
          mYOffset = in.readFloat();
      }
  
      @Override
      public void writeToParcel(Parcel dest, int flags) {
          dest.writeFloat(mXScale);
          dest.writeFloat(mXYMix);
          dest.writeFloat(mXOffset);
          dest.writeFloat(mYXMix);
          dest.writeFloat(mYScale);
          dest.writeFloat(mYOffset);
      }
  
      @Override
      public int describeContents() {
          return 0;
      }
  
      public float[] getAffineTransform() {
          return new float[] { mXScale, mXYMix, mXOffset, mYXMix, mYScale, mYOffset };
      }
  
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          } else if (obj instanceof TouchCalibration) {
              TouchCalibration cal = (TouchCalibration)obj;
  
              return (cal.mXScale  == mXScale)  &&
                     (cal.mXYMix   == mXYMix)   &&
                     (cal.mXOffset == mXOffset) &&
                     (cal.mYXMix   == mYXMix)   &&
                     (cal.mYScale  == mYScale)  &&
                     (cal.mYOffset == mYOffset);
          } else {
              return false;
          }
      }
  
      @Override
      public int hashCode() {
          return Float.floatToIntBits(mXScale)  ^
                 Float.floatToIntBits(mXYMix)   ^
                 Float.floatToIntBits(mXOffset) ^
                 Float.floatToIntBits(mYXMix)   ^
                 Float.floatToIntBits(mYScale)  ^
                 Float.floatToIntBits(mYOffset);
      }
  }
  