content: /*
   * Copyright (C) 2019 Adaptech s.r.o., Robert Pösel
   * Copyright (C) 2011 Google Inc.
   *
   * 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.googlecode.leptonica.android;
  
  import androidx.annotation.IntRange;
  
  /**
   * @author alanv@google.com (Alan Viverette)
   */
  @SuppressWarnings("WeakerAccess")
  public class Rotate {
  	static {
  		System.loadLibrary("jpeg");
  		System.loadLibrary("pngx");
  		System.loadLibrary("leptonica");
  	}
  
  	// Rotation default
  
  	/**
  	 * Default rotation quality is high.
  	 */
  	public static final boolean ROTATE_QUALITY = true;
  
  	/**
  	 * Performs rotation using the default parameters.
  	 *
  	 * @param pixs    The source pix.
  	 * @param degrees The number of degrees to rotate; clockwise is positive.
  	 * @return the rotated source image
  	 */
  	public static Pix rotate(Pix pixs, float degrees) {
  		return rotate(pixs, degrees, false);
  	}
  
  	/**
  	 * Performs rotation with resizing using the default parameters.
  	 *
  	 * @param pixs    The source pix.
  	 * @param degrees The number of degrees to rotate; clockwise is positive.
  	 * @param quality Whether to use high-quality rotation.
  	 * @return the rotated source image
  	 */
  	public static Pix rotate(Pix pixs, float degrees, boolean quality) {
  		return rotate(pixs, degrees, quality, true);
  	}
  
  	/**
  	 * Performs basic image rotation about the center.
  	 * <p>
  	 * Notes:
  	 * <ol>
  	 * <li>Rotation is about the center of the image.
  	 * <li>For very small rotations, just return a clone.
  	 * <li>Rotation brings either white or black pixels in from outside the
  	 * image.
  	 * <li>Above 20 degrees, if rotation by shear is requested, we rotate by
  	 * sampling.
  	 * <li>Colormaps are removed for rotation by area map and shear.
  	 * <li>The dest can be expanded so that no image pixels are lost. To invoke
  	 * expansion, input the original width and height. For repeated rotation,
  	 * use of the original width and height allows the expansion to stop at the
  	 * maximum required size, which is a square with side = sqrt(w*w + h*h).
  	 * </ol>
  	 *
  	 * @param pixs    The source pix.
  	 * @param degrees The number of degrees to rotate; clockwise is positive.
  	 * @param quality Whether to use high-quality rotation.
  	 * @param resize  Whether to expand the output so that no pixels are lost.
  	 *                <strong>Note:</strong> 1bpp images are always resized when
  	 *                quality is {@code true}.
  	 * @return the rotated source image
  	 */
  	public static Pix rotate(Pix pixs, float degrees, boolean quality, boolean resize) {
  		if (pixs == null)
  			throw new IllegalArgumentException("Source pix must be non-null");
  
  		long nativePix = nativeRotate(pixs.getNativePix(), degrees, quality,
  				resize);
  
  		if (nativePix == 0)
  			return null;
  
  		return new Pix(nativePix);
  	}
  
  	/**
  	 * Performs top-level rotation by multiples of 90 degrees.
  	 *
  	 * @param pixs  The source pix (all depths)
  	 * @param quads 0-3; number of 90 degree cw rotations
  	 * @return the rotated source image
  	 */
  	public static Pix rotateOrth(Pix pixs, @IntRange(from = 0, to = 3) int quads) {
  		if (pixs == null)
  			throw new IllegalArgumentException("Source pix must be non-null");
  		if (quads < 0 || quads > 3)
  			throw new IllegalArgumentException("quads not in {0,1,2,3}");
  
  		long nativePix = nativeRotateOrth(pixs.getNativePix(), quads);
  
  		if (nativePix == 0)
  			return null;
  
  		return new Pix(nativePix);
  	}
  
  	// ***************
  	// * NATIVE CODE *
  	// ***************
  
  	private static native long nativeRotateOrth(long nativePix, int quads);
  
  	private static native long nativeRotate(long nativePix, float degrees, boolean quality,
  											boolean resize);
  }
  