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| public class FastGetPixel
{
[DllImport("user32.dll", EntryPoint = "ReleaseDC")]
public static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC);
[DllImport("gdi32.dll")]
private static extern int BitBlt(
IntPtr hdcDest, // handle to destination DC
int nXDest, // x-coord of destination upper-left corner
int nYDest, // y-coord of destination upper-left corner
int nWidth, // width of destination rectangle
int nHeight, // height of destination rectangle
IntPtr hdcSrc, // handle to source DC
int nXSrc, // x-coordinate of source upper-left corner
int nYSrc, // y-coordinate of source upper-left corner
UInt32 dwRop // raster operation code
);
[DllImport("gdi32.dll")]
public static extern uint GetPixel(IntPtr hDC, int x, int y);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool GetWindowRect(HandleRef hWnd, out RECT lpRect);
[StructLayout(LayoutKind.Sequential)]
private struct RECT
{
public int Left; // x position of upper-left corner
public int Top; // y position of upper-left corner
public int Right; // x position of lower-right corner
public int Bottom; // y position of lower-right corner
}
[DllImport("user32.dll")]
public static extern IntPtr GetDesktopWindow();
[DllImport("user32.dll")]
public static extern IntPtr GetWindowDC(IntPtr hWnd);
private const Int32 SRCCOPY = 13369376;
private IntPtr hWnd;
private Bitmap innerbitmap;
private bool screenmade = false;
private BitmapData bmpData;
private int byteLen = 4;
private byte[] bitmapBuffer;
private Color col = Color.Empty;
public FastGetPixel()
{
hWnd = GetDesktopWindow();
}
public FastGetPixel(IntPtr hWndsource)
{
hWnd = hWndsource;
}
public IntPtr Handle{
get{ return hWnd;}
set { try { innerbitmap.UnlockBits(bmpData); } catch { } try { innerbitmap.Dispose(); } catch { } bitmapBuffer = null; screenmade = false; hWnd = value; }
}
public Color GetLockedPixel(int Xpos, int Ypos)
{
try
{
int index = bmpData.Stride * Ypos + Xpos * byteLen;
col = Color.FromArgb(bitmapBuffer[index + 2], bitmapBuffer[index + 1], bitmapBuffer[index + 0]);
}
catch { col = Color.Empty; }
return col;
}
public bool LockWindowImage(PixelFormat PF)
{
try
{
if (!screenmade)
{
RECT rectal = new RECT();
GetWindowRect(new HandleRef(null, hWnd), out rectal);
innerbitmap = new Bitmap(rectal.Right, rectal.Bottom);
Graphics loGraphics = Graphics.FromImage(innerbitmap);
IntPtr lnDst = loGraphics.GetHdc();
IntPtr hDC = GetWindowDC(hWnd);
BitBlt(lnDst, 0, 0, rectal.Right - rectal.Left, rectal.Bottom - rectal.Top, hDC, 0, 0, SRCCOPY);
loGraphics.ReleaseHdc(lnDst);
loGraphics.Flush();
loGraphics.Dispose();
ReleaseDC(hWnd, hDC);
bmpData = innerbitmap.LockBits(new Rectangle(0, 0, innerbitmap.Width, innerbitmap.Height), ImageLockMode.ReadOnly, PF);
bitmapBuffer = new byte[bmpData.Stride * bmpData.Height];
Marshal.Copy(bmpData.Scan0, bitmapBuffer, 0, bitmapBuffer.Length);
byteLen = bmpData.Stride / bmpData.Width;
screenmade = true;
}
else { return false; }
}
catch { return false; }
return true;
}
public bool LockWindowImage()
{
try
{
if (!screenmade)
{
RECT rectal = new RECT();
GetWindowRect(new HandleRef(null, hWnd), out rectal);
innerbitmap = new Bitmap(rectal.Right, rectal.Bottom);
Graphics loGraphics = Graphics.FromImage(innerbitmap);
IntPtr lnDst = loGraphics.GetHdc();
IntPtr hDC = GetWindowDC(hWnd);
BitBlt(lnDst, 0, 0, rectal.Right - rectal.Left, rectal.Bottom - rectal.Top, hDC, 0, 0, SRCCOPY);
loGraphics.ReleaseHdc(lnDst);
loGraphics.Flush();
loGraphics.Dispose();
ReleaseDC(hWnd, hDC);
bmpData = innerbitmap.LockBits(new Rectangle(0, 0, innerbitmap.Width, innerbitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
bitmapBuffer = new byte[bmpData.Stride * bmpData.Height];
Marshal.Copy(bmpData.Scan0, bitmapBuffer, 0, bitmapBuffer.Length);
byteLen = 4;
screenmade = true;
}
else { return false; }
}
catch { return false; }
return true;
}
public bool LockWindowImage(int Left, int Top, int Width, int Height, PixelFormat PF)
{
try
{
if (!screenmade)
{
innerbitmap = new Bitmap(Width, Height);
Graphics loGraphics = Graphics.FromImage(innerbitmap);
IntPtr lnDst = loGraphics.GetHdc();
IntPtr hDC = GetWindowDC(hWnd);
BitBlt(lnDst, 0, 0, Width, Height, hDC, Left, Top, SRCCOPY);
loGraphics.ReleaseHdc(lnDst);
loGraphics.Flush();
loGraphics.Dispose();
ReleaseDC(hWnd, hDC);
bmpData = innerbitmap.LockBits(new Rectangle(0, 0, innerbitmap.Width, innerbitmap.Height), ImageLockMode.ReadOnly, PF);
bitmapBuffer = new byte[bmpData.Stride * bmpData.Height];
Marshal.Copy(bmpData.Scan0, bitmapBuffer, 0, bitmapBuffer.Length);
byteLen = bmpData.Stride / bmpData.Width;
screenmade = true;
}
else { return false; }
}
catch { return false; }
return true;
}
public void Clear() { try { innerbitmap.UnlockBits(bmpData); } catch { } try { innerbitmap.Dispose(); } catch { }bitmapBuffer = null; screenmade = false; }
}
} |
