//// This code is part of Document Solutions for Imaging demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Drawing;using GrapeCity.Documents.Imaging;
namespace DsImagingWeb.Demos{    // This sample demonstrates the use of GcBitmap.GetContentRect() method    // that allows trimming single colored margins off an image.    public class GetContentRect    {        public GcBitmap GenerateImage(Size pixelSize, float dpi, bool opaque, string[] sampleParams = null)        {            // The original goldfish image has white background with margins around the actual fish:            var origImagePath = Path.Combine("Resources", "Stock", "goldfish.jpg");
            // Create the resulting bitmap:            var targetBmp = new GcBitmap(pixelSize.Width, pixelSize.Height, true, dpi, dpi);            using (var origBmp = new GcBitmap())            {                // Load the goldfish image:                using (var stm = new FileStream(origImagePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.RandomAccess))                    origBmp.Load(stm);                // Create graphics on the resulting bitmap, filling it with blue color:                using (var g = targetBmp.CreateGraphics(Color.FromArgb(unchecked((int)0xff004d99))))                {                    // Render the goldfish on white background:                    targetBmp.BitBlt(origBmp, 0, 0);                    // The GetContentRect() method returns the area of the image without                    // margins of the specified color (white in this case):                    var rc = origBmp.GetContentRect(Color.White);                    // Draw a red border on the content rectangle:                    g.DrawRectangle(rc, Color.Red);                }            }            return targetBmp;        }    }}