public static BitmapSource HwndToBitmap(IntPtr hwnd, GrayscaleParameters parameters)
{
IntPtr dc = NativeMethods.GetWindowDC(hwnd);
IntPtr memDC = NativeMethods.CreateCompatibleDC(dc);
int l = 0;
int t = 0;
Kaxaml.Controls.NativeMethods.RECT rct;
NativeMethods.GetWindowRect(hwnd, out rct);
int w = rct.Right - rct.Left;
int h = rct.Bottom - rct.Top;
IntPtr hbm = NativeMethods.CreateCompatibleBitmap(dc, w, h);
IntPtr oldbm = NativeMethods.SelectObject(memDC, hbm);
bool b = NativeMethods.BitBlt(memDC, l, t, w, h, dc, l, t, 0x00CC0020);
BitmapSource src = Imaging.CreateBitmapSourceFromHBitmap(hbm, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
NativeMethods.SelectObject(memDC, oldbm);
NativeMethods.DeleteObject(hbm);
NativeMethods.DeleteDC(memDC);
NativeMethods.ReleaseDC(hwnd, dc);
if (parameters != null)
{
int Width = (int)src.Width;
int Height = (int)src.Height;
byte[] pixels = new byte[Width * Height * 4];
src.CopyPixels(pixels, (Width * 4), 0);
for (int p = 0; p < pixels.Length; p += 4)
{
// compute grayscale
double pixelvalue =
(((double)pixels[p + 0] * parameters.RedDistribution) +
((double)pixels[p + 1] * parameters.GreenDistribution) +
((double)pixels[p + 2] * parameters.BlueDistribution));
// compute compression
pixelvalue = (pixelvalue * parameters.Compression) + (256 * ((1 - parameters.Compression) / 2));
// compute washout
pixelvalue = Math.Min(256, pixelvalue + (256 * parameters.Washout));
byte v = (byte)pixelvalue;
pixels[p + 0] = v;
pixels[p + 1] = v;
pixels[p + 2] = v;
}
return(BitmapSource.Create(Width, Height, 96, 96, PixelFormats.Bgr32, null, pixels, Width * 4));
}
else
{
return(src);
}
}
public static BitmapSource ElementToBitmap(FrameworkElement e, GrayscaleParameters parameters)
{
if (e.ActualWidth == 0 || e.ActualHeight == 0)
{
return(null);
}
return(VisualToBitmap(e, (int)e.ActualWidth, (int)e.ActualHeight, parameters));
}
public static BitmapSource HwndToBitmap(IntPtr hwnd, GrayscaleParameters parameters)
{
IntPtr dc = NativeMethods.GetWindowDC(hwnd);
IntPtr memDC = NativeMethods.CreateCompatibleDC(dc);
int l = 0;
int t = 0;
Kaxaml.Controls.NativeMethods.RECT rct;
NativeMethods.GetWindowRect(hwnd, out rct);
int w = rct.Right - rct.Left;
int h = rct.Bottom - rct.Top;
IntPtr hbm = NativeMethods.CreateCompatibleBitmap(dc, w, h);
IntPtr oldbm = NativeMethods.SelectObject(memDC, hbm);
bool b = NativeMethods.BitBlt(memDC, l, t, w, h, dc, l, t, 0x00CC0020);
BitmapSource src = Imaging.CreateBitmapSourceFromHBitmap(hbm, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
NativeMethods.SelectObject(memDC, oldbm);
NativeMethods.DeleteObject(hbm);
NativeMethods.DeleteDC(memDC);
NativeMethods.ReleaseDC(hwnd, dc);
if (parameters != null)
{
int Width = (int)src.Width;
int Height = (int)src.Height;
byte[] pixels = new byte[Width * Height * 4];
src.CopyPixels(pixels, (Width * 4), 0);
for (int p = 0; p < pixels.Length; p += 4)
{
// compute grayscale
double pixelvalue =
(((double)pixels[p + 0] * parameters.RedDistribution) +
((double)pixels[p + 1] * parameters.GreenDistribution) +
((double)pixels[p + 2] * parameters.BlueDistribution));
// compute compression
pixelvalue = (pixelvalue * parameters.Compression) + (256 * ((1 - parameters.Compression) / 2));
// compute washout
pixelvalue = Math.Min(256, pixelvalue + (256 * parameters.Washout));
byte v = (byte)pixelvalue;
pixels[p + 0] = v;
pixels[p + 1] = v;
pixels[p + 2] = v;
}
return BitmapSource.Create(Width, Height, 96, 96, PixelFormats.Bgr32, null, pixels, Width * 4);
}
else
{
return src;
}
}
public static string VisualToFile(Visual e, int Width, int Height, GrayscaleParameters parameters, string Filename)
{
BitmapSource src = VisualToBitmap(e, Width, Height, parameters);
using (System.IO.FileStream fs = new System.IO.FileStream(Filename, System.IO.FileMode.Create))
{
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(src));
encoder.Save(fs);
}
return(Filename);
}
public static BitmapSource VisualToBitmap(Visual e, int Width, int Height, GrayscaleParameters parameters)
{
Contract.Requires(e != null);
e.VerifyAccess();
RenderTargetBitmap src = new RenderTargetBitmap(Width, Height, 96, 96, PixelFormats.Pbgra32);
src.Render(e);
if (parameters != null)
{
byte[] pixels = new byte[Width * Height * 4];
src.CopyPixels(pixels, (Width * 4), 0);
for (int p = 0; p < pixels.Length; p += 4)
{
// compute grayscale
double pixelvalue =
(((double)pixels[p + 0] * parameters.RedDistribution) +
((double)pixels[p + 1] * parameters.GreenDistribution) +
((double)pixels[p + 2] * parameters.BlueDistribution));
// compute compression
pixelvalue = (pixelvalue * parameters.Compression) + (256 * ((1 - parameters.Compression) / 2));
// compute washout
pixelvalue = Math.Min(256, pixelvalue + (256 * parameters.Washout));
byte v = (byte)pixelvalue;
pixels[p + 0] = v;
pixels[p + 1] = v;
pixels[p + 2] = v;
}
return(BitmapSource.Create(Width, Height, 96, 96, PixelFormats.Bgr32, null, pixels, Width * 4));
}
else
{
return(src);
}
}
public static BitmapSource ElementToBitmap(FrameworkElement e, GrayscaleParameters parameters)
{
if (e.ActualWidth == 0 || e.ActualHeight == 0) return null;
return VisualToBitmap(e, (int)e.ActualWidth, (int)e.ActualHeight, parameters);
}
public static string VisualToFile(Visual e, int Width, int Height, GrayscaleParameters parameters, string Filename)
{
BitmapSource src = VisualToBitmap(e, Width, Height, parameters);
using (System.IO.FileStream fs = new System.IO.FileStream(Filename, System.IO.FileMode.Create))
{
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(src));
encoder.Save(fs);
}
return Filename;
}
public static BitmapSource VisualToBitmap(Visual e, int Width, int Height, GrayscaleParameters parameters)
{
Contract.Requires(e != null);
e.VerifyAccess();
RenderTargetBitmap src = new RenderTargetBitmap(Width, Height, 96, 96, PixelFormats.Pbgra32);
src.Render(e);
if (parameters != null)
{
byte[] pixels = new byte[Width * Height * 4];
src.CopyPixels(pixels, (Width * 4), 0);
for (int p = 0; p < pixels.Length; p += 4)
{
// compute grayscale
double pixelvalue =
(((double)pixels[p + 0] * parameters.RedDistribution) +
((double)pixels[p + 1] * parameters.GreenDistribution) +
((double)pixels[p + 2] * parameters.BlueDistribution));
// compute compression
pixelvalue = (pixelvalue * parameters.Compression) + (256 * ((1 - parameters.Compression) / 2));
// compute washout
pixelvalue = Math.Min(256, pixelvalue + (256 * parameters.Washout));
byte v = (byte)pixelvalue;
pixels[p + 0] = v;
pixels[p + 1] = v;
pixels[p + 2] = v;
}
return BitmapSource.Create(Width, Height, 96, 96, PixelFormats.Bgr32, null, pixels, Width * 4);
}
else
{
return src;
}
}
