{
  "name": "GuassianLockUpdate",
  "language": 0,
  "code": "using System;\r\nusing System.Collections.Generic;\r\nusing System.Diagnostics;\r\nusing System.Drawing;\r\nusing System.Drawing.Imaging;\r\nusing System.IO;\r\nusing System.Threading.Tasks;\r\nusing System.Windows.Forms;\r\nusing System.Runtime.InteropServices;\r\n\r\n// requires the following registry key setting:\r\n//[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\PersonalizationCSP]\r\n//\"LockScreenImagePath\"=\"C:\\\\Temp\\\\BlurredLockScreen.jpg\"\r\npublic static class DisplayFusionFunction\r\n{\r\n\tpublic static void Run(IntPtr windowHandle) {\r\n        if (!BFS.General.IsDesktopLocked()) {\r\n            using (Bitmap bmpScreenCapture = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height)) {\r\n                using (Graphics g = Graphics.FromImage(bmpScreenCapture)) {\r\n                    g.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y,\r\n                             0, 0,\r\n                             bmpScreenCapture.Size,\r\n                             CopyPixelOperation.SourceCopy);\r\n                }\r\n                var blurredbmp = bmpScreenCapture.FastGaussianBlurAsync(5);\r\n                blurredbmp.Save(@\"C:\\Temp\\BlurredLockScreen.jpg\", ImageFormat.Jpeg);\r\n            }\r\n        }\r\n\t}\r\n}\r\n\r\npublic class GaussianBlur {\r\n    private readonly int[] _alpha;\r\n    private readonly int[] _red;\r\n    private readonly int[] _green;\r\n    private readonly int[] _blue;\r\n\r\n    private readonly int _width;\r\n    private readonly int _height;\r\n\r\n    private readonly ParallelOptions _pOptions = new ParallelOptions { MaxDegreeOfParallelism = 16 };\r\n\r\n    public GaussianBlur(Bitmap image) {\r\n        var rct = new Rectangle(0, 0, image.Width, image.Height);\r\n        var source = new int[rct.Width * rct.Height];\r\n        var bits = image.LockBits(rct, ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);\r\n        Marshal.Copy(bits.Scan0, source, 0, source.Length);\r\n        image.UnlockBits(bits);\r\n\r\n        _width = image.Width;\r\n        _height = image.Height;\r\n\r\n        _alpha = new int[_width * _height];\r\n        _red = new int[_width * _height];\r\n        _green = new int[_width * _height];\r\n        _blue = new int[_width * _height];\r\n\r\n        Parallel.For(0, source.Length, _pOptions, i => {\r\n            _alpha[i] = (int)((source[i] & 0xff000000) >> 24);\r\n            _red[i] = (source[i] & 0xff0000) >> 16;\r\n            _green[i] = (source[i] & 0x00ff00) >> 8;\r\n            _blue[i] = (source[i] & 0x0000ff);\r\n        });\r\n    }\r\n\r\n    public Bitmap Process(int radial) {\r\n        var newAlpha = new int[_width * _height];\r\n        var newRed = new int[_width * _height];\r\n        var newGreen = new int[_width * _height];\r\n        var newBlue = new int[_width * _height];\r\n        var dest = new int[_width * _height];\r\n\r\n        Parallel.Invoke(\r\n            () => gaussBlur_4(_alpha, newAlpha, radial),\r\n            () => gaussBlur_4(_red, newRed, radial),\r\n            () => gaussBlur_4(_green, newGreen, radial),\r\n            () => gaussBlur_4(_blue, newBlue, radial));\r\n\r\n        Parallel.For(0, dest.Length, _pOptions, i => {\r\n            if (newAlpha[i] > 255) newAlpha[i] = 255;\r\n            if (newRed[i] > 255) newRed[i] = 255;\r\n            if (newGreen[i] > 255) newGreen[i] = 255;\r\n            if (newBlue[i] > 255) newBlue[i] = 255;\r\n\r\n            if (newAlpha[i] < 0) newAlpha[i] = 0;\r\n            if (newRed[i] < 0) newRed[i] = 0;\r\n            if (newGreen[i] < 0) newGreen[i] = 0;\r\n            if (newBlue[i] < 0) newBlue[i] = 0;\r\n\r\n            dest[i] = (int)((uint)(newAlpha[i] << 24) | (uint)(newRed[i] << 16) | (uint)(newGreen[i] << 8) | (uint)newBlue[i]);\r\n        });\r\n\r\n        var image = new Bitmap(_width, _height);\r\n        var rct = new Rectangle(0, 0, image.Width, image.Height);\r\n        var bits2 = image.LockBits(rct, ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);\r\n        Marshal.Copy(dest, 0, bits2.Scan0, dest.Length);\r\n        image.UnlockBits(bits2);\r\n        return image;\r\n    }\r\n\r\n    private void gaussBlur_4(int[] source, int[] dest, int r) {\r\n        var bxs = boxesForGauss(r, 3);\r\n        boxBlur_4(source, dest, _width, _height, (bxs[0] - 1) / 2);\r\n        boxBlur_4(dest, source, _width, _height, (bxs[1] - 1) / 2);\r\n        boxBlur_4(source, dest, _width, _height, (bxs[2] - 1) / 2);\r\n    }\r\n\r\n    private int[] boxesForGauss(int sigma, int n) {\r\n        var wIdeal = Math.Sqrt((12 * sigma * sigma / n) + 1);\r\n        var wl = (int)Math.Floor(wIdeal);\r\n        if (wl % 2 == 0) wl--;\r\n        var wu = wl + 2;\r\n\r\n        var mIdeal = (double)(12 * sigma * sigma - n * wl * wl - 4 * n * wl - 3 * n) / (-4 * wl - 4);\r\n        var m = Math.Round(mIdeal);\r\n\r\n        var sizes = new List<int>();\r\n        for (var i = 0; i < n; i++) sizes.Add(i < m ? wl : wu);\r\n        return sizes.ToArray();\r\n    }\r\n\r\n    private void boxBlur_4(int[] source, int[] dest, int w, int h, int r) {\r\n        for (var i = 0; i < source.Length; i++) dest[i] = source[i];\r\n        boxBlurH_4(dest, source, w, h, r);\r\n        boxBlurT_4(source, dest, w, h, r);\r\n    }\r\n\r\n    private void boxBlurH_4(int[] source, int[] dest, int w, int h, int r) {\r\n        var iar = (double)1 / (r + r + 1);\r\n        Parallel.For(0, h, _pOptions, i => {\r\n            var ti = i * w;\r\n            var li = ti;\r\n            var ri = ti + r;\r\n            var fv = source[ti];\r\n            var lv = source[ti + w - 1];\r\n            var val = (r + 1) * fv;\r\n            for (var j = 0; j < r; j++) val += source[ti + j];\r\n            for (var j = 0; j <= r; j++) {\r\n                val += source[ri++] - fv;\r\n                dest[ti++] = (int)Math.Round(val * iar);\r\n            }\r\n            for (var j = r + 1; j < w - r; j++) {\r\n                val += source[ri++] - dest[li++];\r\n                dest[ti++] = (int)Math.Round(val * iar);\r\n            }\r\n            for (var j = w - r; j < w; j++) {\r\n                val += lv - source[li++];\r\n                dest[ti++] = (int)Math.Round(val * iar);\r\n            }\r\n        });\r\n    }\r\n\r\n    private void boxBlurT_4(int[] source, int[] dest, int w, int h, int r) {\r\n        var iar = (double)1 / (r + r + 1);\r\n        Parallel.For(0, w, _pOptions, i => {\r\n            var ti = i;\r\n            var li = ti;\r\n            var ri = ti + r * w;\r\n            var fv = source[ti];\r\n            var lv = source[ti + w * (h - 1)];\r\n            var val = (r + 1) * fv;\r\n            for (var j = 0; j < r; j++) val += source[ti + j * w];\r\n            for (var j = 0; j <= r; j++) {\r\n                val += source[ri] - fv;\r\n                dest[ti] = (int)Math.Round(val * iar);\r\n                ri += w;\r\n                ti += w;\r\n            }\r\n            for (var j = r + 1; j < h - r; j++) {\r\n                val += source[ri] - source[li];\r\n                dest[ti] = (int)Math.Round(val * iar);\r\n                li += w;\r\n                ri += w;\r\n                ti += w;\r\n            }\r\n            for (var j = h - r; j < h; j++) {\r\n                val += lv - source[li];\r\n                dest[ti] = (int)Math.Round(val * iar);\r\n                li += w;\r\n                ti += w;\r\n            }\r\n        });\r\n    }\r\n}\r\n\r\npublic static class BitmapExt {\r\n    public static Bitmap FastGaussianBlurAsync(this Bitmap bmp, int radius) {\r\n        var gb = new GaussianBlur(bmp);\r\n        return gb.Process(radius);\r\n    }\r\n}",
  "description": "Update Lock Screen background with gaussian blur of main screen",
  "references": "System.Core.dll|System.Data.dll|System.dll|System.Drawing.dll|System.Management.dll|System.Web.dll|System.Windows.Forms.dll|System.Xml.dll"
}