content: /*
   * Copyright (C) 2007 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 android.annotation.ColorInt;
  import android.annotation.ColorLong;
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.annotation.UnsupportedAppUsage;
  
  public class SweepGradient extends Shader {
      @UnsupportedAppUsage
      private float mCx;
      @UnsupportedAppUsage
      private float mCy;
      @UnsupportedAppUsage
      private float[] mPositions;
  
      // @ColorInts are replaced by @ColorLongs, but these remain due to @UnsupportedAppUsage.
      @UnsupportedAppUsage
      @ColorInt
      private int[] mColors;
      @UnsupportedAppUsage
      @ColorInt
      private int mColor0;
      @UnsupportedAppUsage
      @ColorInt
      private int mColor1;
  
      @ColorLong
      private final long[] mColorLongs;
  
      /**
       * A Shader that draws a sweep gradient around a center point.
       *
       * @param cx       The x-coordinate of the center
       * @param cy       The y-coordinate of the center
       * @param colors   The sRGB colors to be distributed between around the center.
       *                 There must be at least 2 colors in the array.
       * @param positions May be NULL. The relative position of
       *                 each corresponding color in the colors array, beginning
       *                 with 0 and ending with 1.0. If the values are not
       *                 monotonic, the drawing may produce unexpected results.
       *                 If positions is NULL, then the colors are automatically
       *                 spaced evenly.
       */
      public SweepGradient(float cx, float cy, @NonNull @ColorInt int[] colors,
              @Nullable float[] positions) {
          this(cx, cy, convertColors(colors), positions, ColorSpace.get(ColorSpace.Named.SRGB));
      }
  
      /**
       * A Shader that draws a sweep gradient around a center point.
       *
       * @param cx       The x-coordinate of the center
       * @param cy       The y-coordinate of the center
       * @param colors   The colors to be distributed between around the center.
       *                 There must be at least 2 colors in the array.
       * @param positions May be NULL. The relative position of
       *                 each corresponding color in the colors array, beginning
       *                 with 0 and ending with 1.0. If the values are not
       *                 monotonic, the drawing may produce unexpected results.
       *                 If positions is NULL, then the colors are automatically
       *                 spaced evenly.
       * @throws IllegalArgumentException if there are less than two colors, the colors do
       *      not share the same {@link ColorSpace} or do not use a valid one, or {@code positions}
       *      is not {@code null} and has a different length from {@code colors}.
       */
      public SweepGradient(float cx, float cy, @NonNull @ColorLong long[] colors,
              @Nullable float[] positions) {
          this(cx, cy, colors.clone(), positions, detectColorSpace(colors));
      }
  
      /**
       * Base constructor. Assumes @param colors is a copy that this object can hold onto,
       * and all colors share @param colorSpace.
       */
      private SweepGradient(float cx, float cy, @NonNull @ColorLong long[] colors,
              @Nullable float[] positions, ColorSpace colorSpace) {
          super(colorSpace);
  
          if (positions != null && colors.length != positions.length) {
              throw new IllegalArgumentException(
                      "color and position arrays must be of equal length");
          }
          mCx = cx;
          mCy = cy;
          mColorLongs = colors;
          mPositions = positions != null ? positions.clone() : null;
      }
  
      /**
       * A Shader that draws a sweep gradient around a center point.
       *
       * @param cx       The x-coordinate of the center
       * @param cy       The y-coordinate of the center
       * @param color0   The sRGB color to use at the start of the sweep
       * @param color1   The sRGB color to use at the end of the sweep
       */
      public SweepGradient(float cx, float cy, @ColorInt int color0, @ColorInt int color1) {
          this(cx, cy, Color.pack(color0), Color.pack(color1));
      }
  
      /**
       * A Shader that draws a sweep gradient around a center point.
       *
       * @param cx       The x-coordinate of the center
       * @param cy       The y-coordinate of the center
       * @param color0   The color to use at the start of the sweep
       * @param color1   The color to use at the end of the sweep
       *
       * @throws IllegalArgumentException if the colors do
       *      not share the same {@link ColorSpace} or do not use a valid one.
       */
      public SweepGradient(float cx, float cy, @ColorLong long color0, @ColorLong long color1) {
          this(cx, cy, new long[] {color0, color1}, null);
      }
  
      @Override
      long createNativeInstance(long nativeMatrix) {
          return nativeCreate(nativeMatrix, mCx, mCy, mColorLongs, mPositions,
                  colorSpace().getNativeInstance());
      }
  
      private static native long nativeCreate(long matrix, float x, float y,
              long[] colors, float[] positions, long colorSpaceHandle);
  }
  
  