CodeTV.Utils.ResizeImage C# (CSharp) Метод

        public static Image ResizeImage(Image image, int newWidth, int newHeight, bool highQuality)
        {
            System.Drawing.Image result = new Bitmap(newWidth, newHeight);
            System.Drawing.Graphics graphic = Graphics.FromImage(result);

            // Set the quality options
            if (highQuality)
            {
                graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                graphic.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
                graphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            }

            // Constraint the sizes
            double originalRatio = (double)image.Width / image.Height;
            double standardRatio = (double)newWidth / newHeight;
            int offsetX = 0, offsetY = 0;
            if (originalRatio > standardRatio)
            {
                newHeight = (int)(image.Height * newWidth / image.Width);
                offsetY = (newWidth - newHeight) >> 1;
            }
            else
            {
                newWidth = (int)(image.Width * newHeight / image.Height);
                offsetX = (newHeight - newWidth) >> 1;
            }

            // Draw the image with the resized dimensions
            graphic.DrawImage(image, offsetX, offsetY, newWidth, newHeight);

            return result;
        }

        //private Image ResizeImage(Image image, int newWidth, int newHeight, bool highQuality)
        //{
        //    System.Drawing.Image result = new Bitmap(newWidth, newHeight);
        //    System.Drawing.Graphics graphic = Graphics.FromImage(result);

        //    // Set the quality options
        //    if (highQuality)
        //    {
        //        graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
        //        graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
        //        graphic.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
        //        graphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
        //    }

        //    // Constraint the sizes
        //    double originalRatio = (double)image.Width / image.Height;
        //    double standardRatio = (double)newWidth / newHeight;
        //    int offsetX = 0, offsetY = 0;
        //    if (originalRatio > standardRatio)
        //    {
        //        newHeight = (int)(image.Height * newWidth / image.Width);
        //        offsetY = (newWidth - newHeight) >> 1;
        //    }
        //    else
        //    {
        //        newWidth = (int)(image.Width * newHeight / image.Height);
        //        offsetX = (newHeight - newWidth) >> 1;
        //    }

        //    // Draw the image with the resized dimensions
        //    graphic.DrawImage(image, offsetX, offsetY, newWidth, newHeight);

        //    return result;
        //}

        internal void AdjustTVLogo(Channel channel)
        {
            if (channel.Tag != null)
            {
                TreeNode treeNode = channel.Tag as TreeNode;

                if (channel is ChannelFolder)
                {
                    treeNode.ImageKey = treeNode.SelectedImageKey = "FolderClosed";
                    return;
                }
                else if (channel is ChannelTV)
                {
                    string logo = (channel as ChannelTV).Logo;
                    if (logo != null && logo.Length > 0)
                    {
                        if (MainForm.imageListLogoTV.Images.ContainsKey(logo))
                        {
                            treeNode.ImageKey = treeNode.SelectedImageKey = logo;
                            return;
                        }
                        else
                        {
                            try
                            {
                                string path = FileUtils.GetAbsolutePath(logo);
                                if (File.Exists(path))
                                {
                                    Bitmap bitmap = new Bitmap(path);
                                    //if (!Bitmap.IsAlphaPixelFormat(bitmap.PixelFormat))
                                    //    bitmap.MakeTransparent(Color.White);
                                    //Image thumbnail = ResizeImage(bitmap, 16, 16, false);
                                    Image thumbnail = Utils.ResizeImage(bitmap, 16, 16, false);
                                    MainForm.imageListLogoTV.Images.Add(logo, thumbnail);
                                    treeNode.ImageKey = treeNode.SelectedImageKey = logo;
                                    thumbnail.Dispose();
                                    bitmap.Dispose();
                                    return;
                                }
                            }
                            catch (ArgumentException) { }
                        }
                    }
                }

                treeNode.ImageKey = treeNode.SelectedImageKey = "LogoTVDefault";
            }
        }