NDBGJK5.0/Kingo.Plugins/KGIS.Plugin.LayerProperty/Utils/Win32Util.cs

using KGIS.Plugin.LayerProperty.Model;
using System;
using System.Drawing;

namespace KGIS.Plugin.LayerProperty.Utils
{
    public class Win32Util
    {
        public static short COLORONCOLOR = 3;
        public static short HORZSIZE = 4;
        public static short VERTSIZE = 6;
        public static short HORZRES = 8;
        public static short VERTRES = 10;
        public static short ASPECTX = 40;
        public static short ASPECTY = 42;
        public static short LOGPIXELSX = 88;
        public static short LOGPIXELSY = 90;
        public static int InnerDC = 0;
        private static int hdcSrc = 0;
        private static int tempBitmap = 0;
        public static void InitBitmap(int w, int h)
        {
            Win32Util.hdcSrc = User32.GetWindowDC(User32.GetDesktopWindow());
            Win32Util.InnerDC = GDI32.CreateCompatibleDC(Win32Util.hdcSrc);
            Win32Util.tempBitmap = GDI32.CreateCompatibleBitmap(Win32Util.hdcSrc, w, h);
            GDI32.SelectObject(Win32Util.InnerDC, Win32Util.tempBitmap);
        }
        public static Bitmap GetBitmap(int w, int h)
        {
            return new Bitmap(Image.FromHbitmap(new IntPtr(Win32Util.tempBitmap)), w, h);
        }
        public static void ReleaseDC()
        {
            User32.ReleaseDC(User32.GetDesktopWindow(), Win32Util.hdcSrc);
            GDI32.DeleteDC(Win32Util.InnerDC);
            GDI32.DeleteObject(Win32Util.tempBitmap);
        }
        public static void ClearDC(int hDc, Color backgroundColor, int xmin, int ymin, int xmax, int ymax)
        {
            int num = 0;
            RECT rECT;
            rECT.Left_Renamed = xmin;
            rECT.Top = ymin;
            rECT.Right_Renamed = xmax;
            rECT.Bottom = ymax;
            int crColor = ColorTranslator.ToOle(backgroundColor);
            try
            {
                num = GDI32.CreateSolidBrush(crColor);
                User32.FillRect(hDc, ref rECT, num);
            }
            catch (Exception value)
            {
                Console.Write(value);
            }
            finally
            {
                if (num != 0)
                {
                    GDI32.DeleteObject(num);
                }
            }
        }
    }
}