CheckerBoardFast.cs

This code demonstrates how to create an image view in memory and write data into it to create a checkerboard pattern. Tiles are drawn region by region, and is faster than pixel by pixel.

using IOLink;
using System.Diagnostics;
using System;
 
namespace Examples
{
    public class CheckerBoardFast
    {
        static ImageView Build(ulong sideLength)
        {
            // a checker board is always square
            VectorXu64 shape = new VectorXu64(sideLength, sideLength);
            // a checkerboard is black and white, so we use UINT8
            // pixel type
            DataType dtype = DataTypeId.UINT8;
            // create the image view in memory
            ImageView image = ImageViewFactory.Allocate(shape, dtype);
 
            // a checkerboard contains 10 tiles in both direction
            const ulong tileCount = 10;
            VectorXu64 tileSize = shape / tileCount;
            RegionXu64 tileRegion = RegionXu64.CreateFullRegion(tileSize);
 
            byte[] blackTileBuffer = new byte[tileRegion.ElementCount]; // buffer of black pixels
            byte[] whiteTileBuffer = new byte[tileRegion.ElementCount]; // buffer of white pixels
 
            Array.Fill(blackTileBuffer, (byte)0);
            Array.Fill(whiteTileBuffer, (byte)255);
 
            // draw tiles in the image pixel by pixel
            for (ulong i = 0; i < tileCount; ++i)
            {
                for (ulong j = 0; j < tileCount; ++j)
                {
                    // compute the origin position of the region
                    // to write
                    VectorXu64 origin = new VectorXu64(i, j) * tileSize;
                    RegionXu64 currentTileRegion = new RegionXu64(origin, tileSize);
 
                    // write the black or white tile depending on
                    // the tile index parity
                    if ((i + j) % 2 == 0)
                        image.WriteRegion(currentTileRegion, blackTileBuffer);
                    else
                        image.WriteRegion(currentTileRegion, whiteTileBuffer);
                }
            }
 
            return image;
        }
 
        public static void Main(string[] args)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
 
            var imageCheckerBoard = Build(1000);
 
            sw.Stop();
            Console.WriteLine("Checkerboard (faster method) image generated in "
                              + sw.ElapsedMilliseconds + " ms");
 
            // display some information about the image
            Console.WriteLine(imageCheckerBoard.ToString());
 
            Console.WriteLine("SUCCESS");
        }
    }
}