LGES-OC5-PtoP-Welder/WeldingComponents/LASA/GUI/Canvas/Utils/GDIWrapper.cs

using System;
using System.Drawing;

namespace CoreUnit.Control.UserControl.Canvas
{
    // GDI class copied from http://www.codeproject.com/vcpp/gdiplus/gdiandgdiplusmixed.asp
    public enum PenStyles
    {
        PS_SOLID = 0
        , PS_DASH = 1
        , PS_DOT = 2
        , PS_DASHDOT = 3
        , PS_DASHDOTDOT = 4
        , PS_NULL = 5
        , PS_INSIDEFRAME = 6
        , PS_USERSTYLE = 7
        , PS_ALTERNATE = 8
        , PS_STYLE_MASK = 0x0000000F

        , PS_ENDCAP_ROUND = 0x00000000
        , PS_ENDCAP_SQUARE = 0x00000100
        , PS_ENDCAP_FLAT = 0x00000200
        , PS_ENDCAP_MASK = 0x00000F00
        , PS_JOIN_ROUND = 0x00000000
        , PS_JOIN_BEVEL = 0x00001000
        , PS_JOIN_MITER = 0x00002000
        , PS_JOIN_MASK = 0x0000F000

        , PS_COSMETIC = 0x00000000
        , PS_GEOMETRIC = 0x00010000
        , PS_TYPE_MASK = 0x000F0000
    }
    public enum drawingMode
    {
        R2_BLACK = 1   /*  0       */
        , R2_NOTMERGEPEN = 2   /* DPon     */
        , R2_MASKNOTPEN = 3   /* DPna     */
        , R2_NOTCOPYPEN = 4   /* PN       */
        , R2_MASKPENNOT = 5   /* PDna     */
        , R2_NOT = 6   /* Dn       */
        , R2_XORPEN = 7   /* DPx      */
        , R2_NOTMASKPEN = 8   /* DPan     */
        , R2_MASKPEN = 9   /* DPa      */
        , R2_NOTXORPEN = 10  /* DPxn     */
        , R2_NOP = 11  /* D        */
        , R2_MERGENOTPEN = 12  /* DPno     */
        , R2_COPYPEN = 13  /* P        */
        , R2_MERGEPENNOT = 14  /* PDno     */
        , R2_MERGEPEN = 15  /* DPo      */
        , R2_WHITE = 16  /*  1       */
        , R2_LAST = 16
    }

    public class GDI
    {
        private IntPtr hdc;
        private System.Drawing.Graphics grp;
        public void BeginGDI(System.Drawing.Graphics g)
        {
            grp = g;
            hdc = grp.GetHdc();
        }
        public void EndGDI()
        {
            grp.ReleaseHdc(hdc);
        }
        public IntPtr CreatePEN(PenStyles fnPenStyle, int nWidth, int crColor)
        {
            return CreatePen(fnPenStyle, nWidth, crColor);
        }
        public bool DeleteOBJECT(IntPtr hObject)
        {
            return DeleteObject(hObject);
        }
        public IntPtr SelectObject(IntPtr hgdiobj)
        {
            return SelectObject(hdc, hgdiobj);
        }

        public void MoveTo(int X, int Y)
        {
            MoveToEx(hdc, X, Y, 0);
        }
        public void LineTo(int X, int Y)
        {
            LineTo(hdc, X, Y);
        }
        public int SetROP2(drawingMode fnDrawMode)
        {
            return SetROP2(hdc, fnDrawMode);
        }
        public void SetPixel(int x, int y, int color)
        {
            SetPixelV(hdc, x, y, color & 0x00ffffff);
        }

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern void SetPixelV(IntPtr hdc, int x, int y, int color);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern int SetROP2(IntPtr hdc, drawingMode fnDrawMode);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern bool MoveToEx(IntPtr hdc, int X, int Y, int oldp);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern bool LineTo(IntPtr hdc, int nXEnd, int nYEnd);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern IntPtr CreatePen(PenStyles fnPenStyle, int nWidth, int crColor);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern bool DeleteObject(IntPtr hObject);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern void Rectangle(IntPtr hdc, int X1, int Y1, int X2, int Y2);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern IntPtr GetStockObject(int brStyle);

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern int SetBkMode(IntPtr hdc, int iBkMode);

        public static int RGB(int R, int G, int B)
        {
            return (R | (G << 8) | (B << 16));
        }
    }

    public static class XorGdi
    {
        private static int NULL_BRUSH = 5;
        private static int TRANSPARENT = 1;
        public static void DrawLine(PenStyles penStyle, int penWidth, Color col,
            Graphics grp, int X1, int Y1, int X2, int Y2)
        {
            // Extract the Win32 HDC from the Graphics object supplied.
            IntPtr hdc = grp.GetHdc();

            // Create a pen.
            IntPtr gdiPen = GDI.CreatePen(penStyle, penWidth, GDI.RGB(col.R, col.G, col.B));
            GDI.SetROP2(hdc, drawingMode.R2_XORPEN);
            GDI.SetBkMode(hdc, TRANSPARENT);

            // Set the ROP cdrawint mode to XOR.
            GDI.SetROP2(hdc, drawingMode.R2_XORPEN);

            // Select the pen into the device context.
            IntPtr oldPen = GDI.SelectObject(hdc, gdiPen);

            // Draw the line.
            GDI.MoveToEx(hdc, X1, Y1, 0);
            GDI.LineTo(hdc, X2, Y2);

            // Put the old stuff back where it was.
            GDI.SelectObject(hdc, oldPen);
            GDI.DeleteObject(gdiPen);

            // Return the device context to Windows.
            grp.ReleaseHdc(hdc);
        }
        public static void DrawRectangle(Graphics dc, PenStyles penStyle, int penWidth, Color col,
            int X1, int Y1, int X2, int Y2)
        {
            // Extract the Win32 HDC from the Graphics object supplied.
            IntPtr hdc = dc.GetHdc();

            // Create a pen.
            IntPtr gdiPen = GDI.CreatePen(penStyle, penWidth, GDI.RGB(col.R, col.G, col.B));
            GDI.SetROP2(hdc, drawingMode.R2_XORPEN);
            GDI.SetBkMode(hdc, TRANSPARENT);

            // Set the ROP cdrawint mode to XOR.
            GDI.SetROP2(hdc, drawingMode.R2_XORPEN);

            // Select the pen into the device context.
            IntPtr oldPen = GDI.SelectObject(hdc, gdiPen);

            // Create a stock NULL_BRUSH brush and select it into the device
            // context so that the rectangle isn't filled.
            IntPtr oldBrush = GDI.SelectObject(hdc, GDI.GetStockObject(NULL_BRUSH));

            // Now XOR the hollow rectangle on the Graphics object with
            // a dotted outline.
            GDI.Rectangle(hdc, X1, Y1, X2, Y2);

            // Put the old stuff back where it was.
            GDI.SelectObject(hdc, oldBrush); // no need to delete a stock object
            GDI.SelectObject(hdc, oldPen);
            GDI.DeleteObject(gdiPen);        // but we do need to delete the pen

            // Return the device context to Windows.
            dc.ReleaseHdc(hdc);
        }
        public static void DrawRectangle(Graphics dc, PenStyles penStyle, int penWidth, Color col,
            PointF topleft, PointF bottomright)
        {
            DrawRectangle(dc, penStyle, penWidth, col, (int)topleft.X, (int)topleft.Y, (int)bottomright.X, (int)bottomright.Y);
        }
    }
}