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using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.IO;
using System.Net.Sockets;
using System.Collections.Generic;
namespace BigEyes.Server
{
public class UserCapture
{
[DllImport("user32.dll")]
private static extern uint MapVirtualKey(uint uCode, uint uMapType);
[DllImport("user32.dll")]
private static extern IntPtr GetDesktopWindow();
[DllImport("gdi32.dll")]
private static extern bool BitBlt(IntPtr hdcDest,int nXDest,int nYDest,int nWidth,int nHeight,IntPtr hdcSrc,int nXSrc,int nYSrc,int dwRop);
[DllImport("user32.dll")]
private static extern int GetSystemMetrics(int nIndex);
[DllImport("user32.dll")]
private static extern uint SendInput(uint nInputs,ref INPUT input,int cbSize);
[DllImport("user32.dll")]
private static extern void SetCursorPos(int x, int y);
private const int SM_CXSCREEN = 0;
private const int SM_CYSCREEN = 1;
private const uint MOUSEEVENTF_MOVE = 0x0001;
private const uint MOUSEEVENTF_LEFTDOWN = 0x0002;
private const uint MOUSEEVENTF_LEFTUP = 0x0004;
private const uint MOUSEEVENTF_RIGHTDOWN = 0x0008;
private const uint MOUSEEVENTF_RIGHTUP = 0x0010;
private const uint MOUSEEVENTF_MIDDLEDOWN = 0x0020;
private const uint MOUSEEVENTF_MIDDLEUP = 0x0040;
private const uint MOUSEEVENTF_WHEEL = 0x0800;
private const uint MOUSEEVENTF_ABSOLUTE = 0x8000;
private const uint KEYEVENTF_EXTENDEDKEY = 0x0001;
private const uint KEYEVENTF_KEYUP = 0x0002;
private const uint INPUT_MOUSE = 0;
private const uint INPUT_KEYBOARD = 1;
private const int SRCCOPY = 0xCC0020;
struct MOUSE_INPUT
{
public uint dx;
public uint dy;
public uint mouseData;
public uint dwFlags;
public uint time;
public uint dwExtraInfo;
}
struct KEYBD_INPUT
{
public ushort wVk;
public ushort wScan;
public uint dwFlags;
public uint time;
public uint dwExtraInfo;
}
[StructLayout(LayoutKind.Explicit)]
struct INPUT
{
[FieldOffset(0)]
public uint type;
[FieldOffset(4)]
public MOUSE_INPUT mi;
[FieldOffset(4)]
public KEYBD_INPUT ki;
}
private static byte[] _previousBitmapBytes = null;
private int _scaleSize;
public UserCapture(int scalesize)
{
_scaleSize = scalesize;
}
public void PressOrReleaseMouseButton(bool press, bool left, int x, int y)
{
INPUT input = new INPUT();
input.type = INPUT_MOUSE;
input.mi.dx = (uint) x;
input.mi.dy = (uint) y;
input.mi.mouseData = 0;
input.mi.dwFlags = 0;
input.mi.time = 0;
input.mi.dwExtraInfo = 0;
if (left)
{
input.mi.dwFlags = press ? MOUSEEVENTF_LEFTDOWN : MOUSEEVENTF_LEFTUP;
}
else
{
input.mi.dwFlags = press ? MOUSEEVENTF_RIGHTDOWN : MOUSEEVENTF_RIGHTUP;
}
SendInput(1, ref input, Marshal.SizeOf(input));
}
public void MoveMouse(int x, int y)
{
double w = GetSystemMetrics(SM_CXSCREEN);
double h = GetSystemMetrics(SM_CYSCREEN);
SetCursorPos((int)Math.Round((w/(double)_scaleSize) * (double)x,0),(int)Math.Round((h/((h * (double)_scaleSize) / w)) * (double)y,0));
}
public void SendKeystroke(byte virtualKeyCode, bool keyDown, bool extendedKey)
{
INPUT input = new INPUT();
input.type = INPUT_KEYBOARD;
input.ki.wVk = virtualKeyCode;
input.ki.wScan = (byte)MapVirtualKey((uint) virtualKeyCode, 0);
input.ki.dwExtraInfo = 0;
input.ki.time = 0;
if (!keyDown)
{
input.ki.dwFlags |= KEYEVENTF_KEYUP;
}
if (extendedKey)
{
input.ki.dwFlags |= KEYEVENTF_EXTENDEDKEY;
}
SendInput(1, ref input, Marshal.SizeOf(input));
}
private Bitmap GetDesktopBitmap()
{
Size desktopBitmapSize = new Size(GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN));
Graphics graphic = Graphics.FromHwnd(GetDesktopWindow());
Bitmap memImage = new Bitmap(desktopBitmapSize.Width, desktopBitmapSize.Height, graphic);
Graphics memGraphic = Graphics.FromImage(memImage);
IntPtr dc1 = graphic.GetHdc();
IntPtr dc2 = memGraphic.GetHdc();
BitBlt(dc2, 0, 0, desktopBitmapSize.Width, desktopBitmapSize.Height, dc1, 0, 0, SRCCOPY);
graphic.ReleaseHdc(dc1);
memGraphic.ReleaseHdc(dc2);
graphic.Dispose();
memGraphic.Dispose();
return memImage;
}
public byte[] GetDesktopBitmapBytes()
{
Bitmap currentBitmap = GetDesktopBitmap();
currentBitmap = new Bitmap(currentBitmap.GetThumbnailImage(_scaleSize,currentBitmap.Height * _scaleSize / currentBitmap.Width,null,IntPtr.Zero));
MemoryStream ms = new MemoryStream();
currentBitmap.Save(ms,ImageFormat.Jpeg);
byte[] currentBitmapBytes = ms.ToArray();
ms.Close();
byte[] b = compBytes(_previousBitmapBytes, currentBitmapBytes);
_previousBitmapBytes = currentBitmapBytes;
return b;
}
private byte[] compBytes(byte[] old, byte[] now)
{
if (old == null)
{
byte[] b = new byte[now.Length + 1];
b[0] = 0;
Array.Copy(now, 0, b, 1, now.Length);
return b;
}
MemoryStream ms = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms);
bool equality = true;
int min = Math.Min(old.Length, now.Length);
for (int i = 0; i < min; i++)
{
if (old[i] != now[i])
{
bw.Write(i);
bw.Write(now[i]);
equality = false;
}
}
if (equality)
{
return new byte[0];
}
for (int i = min + 1; i < now.Length; i++)
{
bw.Write(i);
bw.Write(now[i]);
}
if (ms.Length >= now.Length)
{
byte[] b = new byte[now.Length + 1];
b[0] = 0;
Array.Copy(now, 0, b, 1, now.Length);
return b;
}
else
{
System.Diagnostics.Debug.WriteLine("Partial image.");
byte[] r = ms.ToArray();
byte[] b = new byte[r.Length + 1];
b[0] = 1;
Array.Copy(r, 0, b, 1, r.Length);
return b;
}
}
}
}
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