Extensions/ImageGlass.Core/BitmapBooster.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;

namespace ImageGlass.Core
{
    public class BitmapBooster
    {

        Bitmap src;
        BitmapData bd;
        IntPtr dst;
        int str;

        public BitmapBooster(Bitmap src)
        {
            this.src = src;
            bd = src.LockBits(
                new Rectangle(Point.Empty, src.Size),
                ImageLockMode.ReadWrite,
                PixelFormat.Format32bppArgb);
            dst = bd.Scan0;
            str = bd.Stride;
        }
        public void Dispose()
        {
            src.UnlockBits(bd);
        }

        public Color Get(int x, int y)
        {
            unsafe
            {
                byte* o = (byte*)dst;
                int ofs = str * y + x * 4;
                return Color.FromArgb(
                    o[ofs + 3],
                    o[ofs + 2],
                    o[ofs + 1],
                    o[ofs + 0]);
            }
        }

        public void Set(int x, int y, Color c)
        {
            unsafe
            {
                byte* o = (byte*)dst;
                int ofs = str * y + x * 4;
                o[ofs + 3] = c.A;
                o[ofs + 2] = c.R;
                o[ofs + 1] = c.G;
                o[ofs + 0] = c.B; 
            }
        }

        public void Set(int x, int y, byte alpha)
        {