ImageSharp/src/ImageProcessorCore/Samplers/Rotate.cs

// <copyright file="Rotate.cs" company="James Jackson-South">
// Copyright (c) James Jackson-South and contributors.
// Licensed under the Apache License, Version 2.0.
// </copyright>

namespace ImageProcessorCore
{
    using Processors;

    /// <summary>
    /// Extension methods for the <see cref="Image"/> type.
    /// </summary>
    public static partial class ImageExtensions
    {
        /// <summary>
        /// Rotates an image by the given angle in degrees, expanding the image to fit the rotated result.
        /// </summary>
        /// <param name="source">The image to rotate.</param>
        /// <param name="degrees">The angle in degrees to perform the rotation.</param>
        /// <param name="progressHandler">A delegate which is called as progress is made processing the image.</param>
        /// <returns>The <see cref="Image"/></returns>
        public static Image Rotate(this Image source, float degrees, ProgressEventHandler progressHandler = null)
        {
            return Rotate(source, degrees, true, progressHandler);
        }

        /// <summary>
        /// Rotates an image by the given angle in degrees.
        /// </summary>
        /// <param name="source">The image to rotate.</param>
        /// <param name="degrees">The angle in degrees to perform the rotation.</param>
        /// <param name="expand">Whether to expand the image to fit the rotated result.</param>
        /// <param name="progressHandler">A delegate which is called as progress is made processing the image.</param>
        /// <returns>The <see cref="Image"/></returns>
        public static Image Rotate(this Image source, float degrees, bool expand, ProgressEventHandler progressHandler = null)
        {
            RotateProcessor processor = new RotateProcessor { Angle = degrees, Expand = expand };
            processor.OnProgress += progressHandler;

            try
            {
                return source.Process(source.Width, source.Height, source.Bounds, source.Bounds, processor);
            }
            finally
            {
                processor.OnProgress -= progressHandler;
            }
        }
    }
}