impscaletransform.cs

破解的飞信源代码

namespace Imps.Utils
{
    using System;
    using System.Drawing;
    using System.Drawing.Drawing2D;

    public class ImpScaleTransform : IImageTransform
    {
        protected int _height;
        protected bool _keepRatio;
        protected int _width;

        public ImpScaleTransform(int width, int height) : this(width, height, false)
        {
        }

        public ImpScaleTransform(int width, int height, bool keepRatio)
        {
            this._width = width;
            this._height = height;
            this._keepRatio = keepRatio;
        }

        public virtual IImage Transform(IImage image)
        {
            IImage image5;
            if (image == null)
            {
                throw new ArgumentNullException("image");
            }
            int width = this.Width;
            int height = this.Height;
            int x = 0;
            int y = 0;
            IImage image2 = null;
            try
            {
                image2 = (IImage) image.Clone();
                using (Image image3 = image.Image)
                {
                    using (Image image4 = new Bitmap(this.Width, this.Height, image3.PixelFormat))
                    {
                        using (Graphics graphics = Graphics.FromImage(image4))
                        {
                            float num5 = image.Width;
                            float num6 = image.Height;
                            float num7 = num5 / num6;
                            float num8 = ((float) this.Width) / ((float) this.Height);
                            if (this._keepRatio && (num5 != num6))
                            {
                                float num9;
                                if (num7 < num8)
                                {
                                    num9 = ((float) this.Height) / num6;
                                }
                                else
                                {
                                    num9 = ((float) this.Width) / num5;
                                }
                                height = Convert.ToInt32((float) (num6 * num9));
                                width = Convert.ToInt32((float) (num5 * num9));
                                x = (this.Width - width) / 2;
                                y = (this.Height - height) / 2;
                            }
                            graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                            graphics.DrawImage(image3, new Rectangle(x, y, width, height), new Rectangle(0, 0, (int) num5, (int) num6), GraphicsUnit.Pixel);
                        }
                        image2.Image = image4;
                    }
                }
                image5 = image2;
            }
            catch (Exception exception)
            {
                if (image2 != null)
                {
                    image2.Dispose();
                }
                throw exception;
            }
            return image5;
        }

        public int Height
        {
            get
            {
                return this._height;
            }
            set
            {
                this._height = value;
            }
        }

        public bool KeepRatio
        {
            get
            {
                return this._keepRatio;
            }
            set
            {
                this._keepRatio = value;
            }
        }

        public int Width
        {
            get
            {
                return this._width;
            }
            set
            {
                this._width = value;
            }
        }
    }
}