/////////////////////////////////////////////////////////////////////////
 //
 //     www.ultima.smoce.net
 //     Name: Snap
 //
 /////////////////////////////////////////////////////////////////////////
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading;

namespace Phoenix.Plugins
{
    public static partial class Commands
    {
        [Command]
        public static void Snap() { SaveScreenshot(CaptureWindow(Client.HWND)); }

        [Command]
        public static void SnapAll() { SaveScreenshot(CaptureWindow(User32.GetDesktopWindow())); }

        private static void SaveScreenshot(Image img)
        {
            DirectoryInfo dir = new DirectoryInfo(Path.Combine(Core.Directory, "Screenshots"));
            dir.Create();

            string name = "Momentka_" + DateTime.Now.ToString(@"[yyyy-MM-dd]_HH-mm-ss") + ".jpg";

            new Thread(() =>
                       {
                           img.Save(Path.Combine(dir.FullName, name), ImageFormat.Jpeg);
                           UO.Print(0x06EA,"Screenshot byl ulozen.");
                       }).Start();
        }

        private static Image CaptureWindow(IntPtr handle)
        {
            IntPtr hdcSrc = User32.GetWindowDC(handle);
            User32.RECT windowRect = new User32.RECT();
            User32.GetWindowRect(handle, ref windowRect);
            int width = windowRect.right - windowRect.left;
            int height = windowRect.bottom - windowRect.top;
            IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);
            IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width, height);
            IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap);
            GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, GDI32.SRCCOPY);
            GDI32.SelectObject(hdcDest, hOld);
            GDI32.DeleteDC(hdcDest);
            User32.ReleaseDC(handle, hdcSrc);
            Image img = Image.FromHbitmap(hBitmap);
            GDI32.DeleteObject(hBitmap);
            return img;
        }
    }

    public class GDI32
    {
        public const int SRCCOPY = 0x00CC0020;

        [DllImport("gdi32.dll")]
        public static extern bool BitBlt(IntPtr hObject, int nXDest, int nYDest,
                                         int nWidth, int nHeight, IntPtr hObjectSource,
                                         int nXSrc, int nYSrc, int dwRop);

        [DllImport("gdi32.dll")]
        public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth,
                                                           int nHeight);

        [DllImport("gdi32.dll")]
        public static extern IntPtr CreateCompatibleDC(IntPtr hDC);

        [DllImport("gdi32.dll")]
        public static extern bool DeleteDC(IntPtr hDC);

        [DllImport("gdi32.dll")]
        public static extern bool DeleteObject(IntPtr hObject);

        [DllImport("gdi32.dll")]
        public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
    }

    public class User32
    {
        [DllImport("user32.dll")]
        public static extern IntPtr GetDesktopWindow();

        [DllImport("user32.dll")]
        public static extern IntPtr GetWindowDC(IntPtr hWnd);

        [DllImport("user32.dll")]
        public static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC);

        [DllImport("user32.dll")]
        public static extern IntPtr GetWindowRect(IntPtr hWnd, ref RECT rect);

        #region Nested type: RECT
        [StructLayout(LayoutKind.Sequential)]
        public struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }
        #endregion
    }
}